JP4538582B2 - Scum remover - Google Patents

Description

  The present invention relates to a scum removing device.

  For example, FIG. 24 (corresponding to the rear view of the apparatus of FIG. 25) shows a configuration in which three rows of sedimentation basins (which may be one sedimentation basin in three rows of waterways) 200 are arranged side by side. However, the sedimentation basin 200 includes end side walls 201 at the left end and the right end, and a partition side wall 202 therebetween. Reference numeral 203 denotes a water surface, and skimmer pipes (scum discharge rods) 204 are horizontally mounted across each water surface 203, and both ends of the pipe 204 are supported by bearings 205 so as to be reciprocally rotatable around an axis. Yes. Reference numeral 206 denotes a communication pipe that is passed through the partition side wall 202. Reference numeral 207 denotes a rightmost end pipe, and the right end thereof faces the scum pit 208. Reference numeral 209 denotes a drive source composed of an electric cylinder, which is one of drive means. A rod 210 protruding from the drive source 209 is responsive to the skimmer pipe 204 via a link 211 as shown in a side sectional view of FIG. It is connected freely.

Problems to be solved by the invention

In such a scum removing apparatus, the skimmer pipe 204 is rotated counterclockwise by pulling up the rod 210 from the state shown in FIG. 25 by the drive source 209, so that the attracting port 204 a opened at the upper part of the skimmer pipe 204 is below the water surface 203. The scum floating on the water surface is swallowed into the pipe. On the other hand, when the rod 210 is pushed down by the drive source 209 and the pipe 204 is returned clockwise in FIG. 25, the attracting port 204a comes on the water surface and enters a damming state. Repeat the above operation. Note that the scum and water (sometimes referred to as scum water) swallowed through the attracting port 204a are removed from the skimmer pipe 204 set to a slight right downward in FIG. 24 into the scum pit 208 through the end pipe 207. .
By the way, in the conventional apparatus provided with a plurality of skimmer pipes 204 as described above, all of them are configured to rotate at the same time and all of them are driven by a single drive source 209. The scum inflow into the downstream skimmer pipe 204 with the end pipe 207 precedes, and as a result, the swallowing into the two skimmer pipes 204 on the upstream side of the scum is not performed positively and is delayed. 24, the scum in the sedimentation basin 200 in the left two rows in FIG. 24 could not be effectively attracted / excluded. Further, since it is rotatably supported by the bearing 205, not only is the structure complicated, but if a series of three-pipe type is used, the centering of these is a difficult task.
In view of the above, an object of the present invention is to provide a scum removing device having a simple structure capable of attracting and removing scum evenly from any sedimentation basin.

Means for solving the problem

In order to solve the above-mentioned problem, the invention according to claim 1 is a scum that is horizontally installed in a plurality of rows of rectangular sedimentation ponds adjacent to each other so as to be above and below the water surface and communicates with each other and flows in with water. A plurality of fixed troughs connected in series so that the spillage always flows in one direction, and the scum that floats on the water surface during the descending motion is swallowed together with the water by moving up and down on the water surface provided on each trough A plurality of dam members for stopping stagnation during operation; and a driving means for alternately moving the dam members up and down. The driving means includes a plurality of dam members by a driving means having a single driving source. In the scum removing device configured to selectively move up and down, the driving means extends along the upper side of the trough while penetrating the side wall, and is rotatably mounted and supported on the trough side. A single drive shaft that is rotationally driven by a drive source, and a drive arm that has a plurality of protruding outer circumferential positions corresponding to the weir members of the drive shaft and are in a relationship in which the phases are shifted in the circumferential direction; while and a drive roller provided in each drive arm, on the upper side of the dam member, characterized in that the plate profiling changing the rotational movement of the drive roller up and down movements of the dam member is eclipsed set.
According to a second aspect of the present invention, in the first aspect of the present invention, the drive arm is provided so as to be switchable to an idle state around the drive shaft.

The invention's effect

  According to the present invention, it is possible to provide a scum removing device having a simple structure capable of attracting and removing scum evenly from any sedimentation basin.

BEST MODE FOR CARRYING OUT THE INVENTION

1 to 4 show an embodiment of a scum removing device according to the present invention.
Reference numeral 1 denotes a rectangular sedimentation basin. In this embodiment, three rows of sedimentation basins 1, 2 and 3 are arranged adjacent to each other. The sedimentation basins 1, 2, and 3 are called water channels, and there are cases where these three rows of water channels are one sedimentation basin. Of course, these sedimentation basins 1 , 2, and 3 may have two rows, four rows, or other numbers of rows. The sedimentation basins 1, 2, and 3 are provided with end side walls 4 at the left end and the right end in FIGS. 1 to 3, and a partition side wall 5 between them. Reference numerals 4a and 5a denote stepping wall surfaces on the upper surface.
Further, the left direction in FIG. 1 corresponds to the upstream side, and sewage flows to the downstream side beyond the intermediate partition wall 6 (see FIG. 4) which is the right direction. Similarly, the scum flows in the downstream direction. 7 is an intermediate walkway.
In each sedimentation basin 1, 2 and 3, a chain flight type sludge scraping device is constructed, for example, as illustrated in FIG. 9 and scrapes floating scum to the downstream side when the flight comes upward. To send. The present scum removing device is arranged so as to face the scraped portion.
In addition, 8 is a water surface and 9 is a scum pit (right end falling water space of FIG. 1 thru | or 3).

  Reference numeral 10 denotes a communication pipe having both ends open, and the pipe 10 is a rectangular tube body having flanges F at both ends, and is open to the intermediate partition walls 6 and 6 as shown by broken lines in FIGS. After passing through the hole 11 ′, it is buried and fixed with mortar as shown by a broken line 11. Note that the bottom surface of the right communication pipe 10 in FIG. 3 is slightly lower than the left communication pipe 10 for the purpose of flowing scum water in the right direction.

  Reference numeral 12 denotes an end pipe having both ends open, and the pipe 12 is passed through the right end side wall 4 and embedded and fixed in the same manner as the communication pipe 10 as shown in FIGS. The pipe 12 is provided with a flange F at one end, while the other end has an open port without a flange facing the scum pit 9.

  Reference numeral 15 denotes a trough (scum discharge rod). As shown in FIG. 4, the cross section is formed into a J-shaped square rod shape with a front wall a, a bottom wall b, and a back wall c. Are provided with a front flange d below the water surface 8, and a back flange c is also provided with a rear flange e above the water surface 8. The trough 15 includes flanges F at both ends thereof, and includes a fixed front plate 16 at the inner corner portion formed by the flange F and the front flange d so as to form a pair of left and right. As shown in FIG. 3, one such trough 15 is provided with an adjuster 19 between the closing flange F at one end via an upper angle 17 and an end side wall 4 via a lower angle 18. On the other hand, the open flange F at the other end is connected and fixed to the flange F of the communication pipe 10 in a continuous manner by a fastening device.

  The intermediate trough 15 is horizontally fixed by connecting the left and right flanges F to the flange F of the communication pipe 10. The right trough 15 is horizontally fixed by joining one end to the flange F of the communication pipe 10 and the other end to the flange F of the terminal pipe 12. In FIG. 3, the bottom surface of the trough 15 is gradually lowered from the left to the right so that the scum water flows easily in the right direction.

  Inside each trough 15, as shown in the cross section of FIG. 4, a weir joint plate 21 bent in a rubber shape and attached to a front wall a is attached to the front wall a. The sides are provided so as to rise and incline toward the trough 15. The dam joint plate 21 is long on the left and right, and a hollow dam member (damming means) 22 is attached via the swash plate portion. The weir member 22 has a triangular hollow portion, and a movable side plate 23 is integrated in a closed shape at both ends thereof. While the movable side plate 23 and the fixed front plate 16 are in a bellows shape as shown on the left side of FIG. A pair of left and right side seals 25 that prevent water from entering from the front are provided.

  As shown in FIG. 1, the left and right troughs 15 are provided with an intermediate bracket 27 having an L shape at an intermediate position in the longitudinal direction, and a lower portion of the front end is fixed on the front flange F, while a rear end thereof is a back. It is fixed to the wall c. A receiving plate 28 and a bearing 29 are fixed to the bracket 27, and the receiving plate 28 and the bearing 29 are also provided on the flange F side so as to face each other. Between these opposed surfaces, a round pipe-shaped drive shaft 31 is supported by a bearing 29 and is rotatable. Reference numeral 32 denotes a connecting flange.

  The intermediate trough 15 is provided with a receiving plate 28 and a bearing 29 opposite to each other via a flange F, and a long drive shaft 31 is provided therebetween. Connection flanges 32 are also provided at both ends of the shaft 31. Reference numeral 35 denotes a joint pipe, and the pipe 35 connects the drive shafts 31 to each other via a connection flange 32 so as to be rotatable. The pipe 35 is rotatably inserted through a through hole 36 (see a broken line in FIG. 3) opened on the upper side together with the chip hole 11 ′.

These three drive shafts 31 are connected by a joint pipe 35 to form a single shaft and are rotated at the same time. A drive arm 39 with a drive roller 38 is provided on each outer periphery of the drive shaft 31. Is protruding. There are a total of three drive arms 39, and they are provided with a phase shift (120.degree.) In the circumferential direction as shown in FIG. In the case of this embodiment, for example, in FIG. 1, the left side roller 38, the right side intermediate drive roller 38, and the right side drive roller 38 are provided so as to sequentially follow.
This arrangement is not limited. For example, the rotation is performed in any order such that the left driving roller 38, the rightmost driving roller 38, and then the central driving roller 38 rotate in this order in FIG. May be.

  On the other hand, as shown in FIG. 4, a copying plate (transmission member) 41 that gets on the driving roller 38 when the driving roller 38 comes down and gradually pushes it away is formed as an upper concave curved plate at the intermediate position in the longitudinal direction of the weir member 22. The copying plate 41 is provided with a lower bending portion 41a for smooth operation that is bent downward by a quarter arc of a narrow plate and bent downward at the rear end thereof. Single plate-like lower brackets 42 and 43 are fixed to each other through a pair of front and rear so as to be between the widths of the plate 41. The front lower bracket 42 is fixed by welding via the upper surface of the weir member 22, and the rear lower bracket 43 is fixed by welding via the rear end surface of the weir member 22.

  Between the copying plate 41 and the upper end of the dam member 22, a more positive clearance may be provided than shown in FIG. 4. In addition, the copying plate 41 is a plate having a plate surface parallel to a surface crossing the weir member 22 (a surface parallel to the paper surface of FIG. 4) and having a curved edge as shown in FIG. May be. The edge may be formed by adding a rod having a square cross section instead of a plate surface as a reinforcing edge.

  45 is a driven sprocket, which is provided around the central drive shaft 31, and a drive sprocket 46 for this is provided in a drive source 47 which is a motor with a speed reducer installed on the pond, as shown in FIGS. A chain 48 is hung between them. The drive source 47 is always continuously driven in a constant direction or intermittently driven by a timer.

  As shown in FIG. 1 and FIG. 4, a stay 50 is projected from the front lower portion of each trough 15 so as to form a pair of left and right, and a guide bar 51 is provided vertically. 52, a pair of left and right sides are formed, and the water level follower plate 53 is movable up and down via the left and right elevating pipes 52. The water level follower plate 53 is constituted by a plate body 53a and a float 53b. The upper end of the plate 53 is configured to ensure a level h that is constantly lowered even when the water surface 8 fluctuates, so that the amount of circulating water can be regulated and controlled constantly.

Here, the operation of the scum removing device will be described.
2 to 4 in FIG. 1 is a state where the scum is swallowed in the leftmost settling basin 1 as shown in FIG. 1, whereas the one shown in FIGS. In FIG. 2, the scum is in a state of being swallowed, and although they do not coincide with each other, the operation will be described with reference to these drawings.
As shown in FIG. 4, when the driven sprocket 45 is rotated slowly and continuously in the counterclockwise direction, the series of three drive shafts 31 and the three drive rollers 38 protruding therefrom are also slowly moved in the same direction. Driven by rotation.

  In FIG. 1, the driving roller 38 comes downward in the settling basin 1 and pushes down the copying plate 41, and accordingly, the weir member 22 is in a stagnation state slightly lower than the water surface 8 as indicated by an imaginary line in FIG. 4. Yes. As a result, as shown in FIG. 1, the scum floating on the water surface in the sedimentation basin 1 is swallowed into the trough 15 over the weir member 22 as indicated by an arrow A. However, in the other sedimentation basins 2 and 3, the scum does not stagnate because the dam member 22 is in the dammed state in which the driving roller 38 has not yet pushed down the copying plate 41 and is lifted as shown in FIG.

  Accordingly, only the scum water swallowed from the settling basin 1 in the state of FIG. 1 flows in the series of troughs 15, 15, 15, and there is no possibility that the scum water stays in the trough 15. The scum water in the trough 15 in FIG. 1 passes through the troughs 15 and 15 corresponding to the sedimentation basins 2 and 3 and the communication pipes 10 and 10 and is finally discharged into the scum pit 9 from the opening of the end pipe 12.

  When the drive shaft 31 further rotates from the state shown in FIG. 1, the drive roller 38 corresponding to the settling basin 2 and the drive roller 38 corresponding to the settling basin 3 push down the respective copying plates 41 and 41 next to the weirs. The member 22 is pushed down and the scum is squeezed as shown by arrows B → C.

In some cases, the stagnation in the two sedimentation basins 1 and 2 is performed while the stagnation in the sedimentation basin 3 is stopped. In this case, the drive roller 38 corresponding to the sedimentation basin 1 and the drive roller 38 corresponding to the sedimentation basin 2 may be in phase with each other in the circumferential direction or may be slightly shifted back and forth.
In some cases, the timing of pressing the driving roller 38 can be adjusted afterwards. For that purpose, the angle of the drive shaft 31 is adjusted, the angle of the drive arm 39 is adjusted, or the position of the drive roller 38 is adjusted relative to the drive arm 39.
As shown in FIG. 4, a seal packing, a stop plate, or the like may be interposed between the troughs 15 in order to eliminate a gap in the rear portion of the trough 15.
The length of the drive arm 39 may be adjustable, or the drive roller 38 may be exchangeable. In this case, there are a case where a new one is exchanged and a case where an exchange is made for adjustment such as one having a different diameter or width.

The power supply to the drive source can also be performed from the solar panel 54 as shown in FIG.
The drive shaft 31 corresponding to the sedimentation basins 1 and 3 was slightly shortened and supported at the end by the intermediate bracket 27. However, as shown in FIG. 29 may be supported.
As shown in the figure, a plurality of (two or more) drive rollers 38 are provided on the drive shaft 31 in one trough 15, and a copying plate 41 is also provided on the side of the dam member 22 so that the dam member 22 is well balanced. You may comprise so that it may push down.

A watertight rotary joint 56 may be attached to the drive shaft 31 so that water can be supplied into the drive shaft 31, and water may be sprayed from the nozzles 57 of the drive shaft 31 toward the assumed scum residence.
Depending on the settling basin, scum may be generated only slightly when installed and operated. In this case, the driving roller 38 that does not need to be driven can be put into a resting state by the method shown in FIG. The base pipe 60 of the drive arm 39 is fastened by a pin 61, and the pin 61 corresponding to an unnecessary sedimentation basin is pulled out to make it idle.
In the above embodiment, the square trough 15 has been described, but other shapes such as a round bottom (U shape) and a V shape may be used.
In the above embodiment, the fixed trough 15 has been described. However, as shown in FIGS. 22 and 23, the rotating skimmer pipe (with damming means) is supported in an individually rotating manner, and these are communicated and driven as described above. In some cases, the shaft 31 and the driving roller 38 may be individually driven.

As shown in FIG. 4, the scum passing over the weir member 22 is various in addition to a fine one, such as a thickened layer by consolidation or a large one in plan view. In order to cope with such a situation, as shown in FIG. 7, in addition to crushing the scum by the driving roller 38, a rubber-like or spring-like crushing member 63... The upper scum may be crushed.
As shown in FIG. 8, the copying plate 41 may be formed with uneven portions 65 in one step or several steps, and the weir member 22 vibrates up and down accordingly, so that the scum can be easily dropped. The drive roller 38 side may be uneven.
As shown in the figure, the manual arm 66 may be erected from the dam member 22 side. Further, balancing may be performed by projecting a weight 67 interlocking from the dam member 22 side.

  FIG. 9 shows another drive system of the drive shaft 31. A chain 71 that is circulated and driven by a drive sprocket 70 or the like is provided in the settling pond, and the flight 72 is circulated and driven over the pond bottom and the pond. The driving force of such a chain flight type sludge scraping device is used. A rotary plate 75 with an eccentric pin 74 is mounted on the upper part of the drive chain 73, and this is coaxially arranged on the output shaft of an existing drive motor, and the rotary motion of the eccentric pin 74 is converted into a back and forth reciprocating motion. Therefore, the groove cam 76 of the lower fulcrum is engaged, and the pond is passed through the cam 76 via the interlocking rod 77, and the rod 77 can be reciprocated by the spring 78. By this reciprocation, the drive shaft 31 is driven to rotate in one direction continuously via the ratchet device 79.

As shown in FIG. 10, the interlocking sprocket 82 may be meshed around the driving chain 81, and the driving sprocket 84 may be continuously rotated via the interlocking chain 83, whereby the driving shaft 31 may be interlocked.
In the chain flight type, the intermediate shaft 86 is provided as an existing one, but an interlocking sprocket 87 may be provided around the coaxial 86 so that the drive shaft 31 is rotationally interlocked.

  As shown in FIG. 11, the lever 90 may be swung by one-way motion of the flight 89, and the interlocking chain 92 may be converted into intermittent one-way motion by the ratchet device 91 to interlock the drive shaft 31.

  In FIG. 12, the water wheel 94 is rotationally driven by falling water, and the drive shaft 31 is interlocked via the deceleration booster mechanism 95. The water wheel 94 may be installed at another location.

  13 and 14 include an interlocking sprocket 97 in addition to the driven sprocket 45 around the drive shaft 31, and an interlocking receiving sprocket 98 around a shaft 96 that is rotatably mounted in front of the scum removing device. By rotating the shaft 96, the scum scraping material 100 made of a spring bar, a spring plate, or a rubber material projecting around the shaft 96 is rotationally interlocked to scrape the scum on the water surface toward the scum removing device. It is what I did. As shown in FIG. 14, the intermediate shaft 101 may be far from the scum removing device. In such a case, the shaft 96 is provided with two shafts, and the conveyor 102 with the scum scraping material 100 is provided between the shafts 96 so that the intermediate shaft 101 is fed. Sometimes. It is to be noted that the scum can be quickly fed into these drives by interlocking with the speed increasing mechanism 103.

  As shown in FIG. 15, the speed increasing chain mechanism 105 is extended forward from the side of the driven sprocket 45, and the rotation lever 107 is provided around the drive shaft 106 at the tip thereof to drive the scraping plate 108 to scrape the scum. You may do it.

  In the embodiment shown in FIG. 16, the driving method is applied to a structure in which weir members 22 are arranged before and after the trough 15 and scum is alternately swallowed from the front and rear. That is, the drive shaft 31 is arranged at the front and rear, and the drive roller 38 is provided on the outer periphery thereof. The front and rear drive rollers 38 press the copying plate 41 at different timings.

  In the embodiment of FIG. 17, the front and rear copying plates 41 are alternately pressed by the driving roller 38 around the single driving shaft 31. One copying plate 41 is transferred to the other copying plate 41.

  FIG. 18 shows that the drive roller 38 moves in the direction of the arrow in order to crush the scum accumulated or passed on the front side of the scum removing device having the above-described configuration. 112 is vibrated up and down to get over the scum caught on the same plate 112. In other words, 113 is an auxiliary float that moves up and down together with the water level follower plate 112, but a diaphragm 115 such as a spring or rubber plate is attached via the float shaft 114, and the diaphragm 115 is attached to the drive roller 38. The water level follower plate 112 is caused to vibrate up and down by being placed on the rotation orbit. The tip of the diaphragm 115 may be uneven. The diaphragm 115 may be struck by a rotating arm other than the driving roller 38.

19 and 20 show a proposed example of a monorail sludge scraping device.
117 is a sedimentation basin, and one guide rail 118 is laid through the bottom of the sedimentation basin 117 so as to pass through the center in the pond width direction. The sludge pit 119 provided at the bottom of the sedimentation basin 117 is usually 1 It is a place, but here it is deployed at a total of 3 places, before and after and in the middle. The pit 119 may be further arranged. The pits 119 are configured so that the accumulated sludge can be extracted to the outside by extracting means.

  On the guide rail 118, a total of three carriages 120 in the front and rear and between them are allowed to run on the wheels 121, and the front and rear are connected at the same time with a connecting rod 122 so as to freely advance and retreat. A sludge scraper 123 is provided in front of each carriage 120. The scraper 123 is fixed to the carriage 120 instead of being switchable up and down. This greatly simplifies the structure.

  As shown in FIG. 21, a sludge scraping device having a short front and rear may be used instead of the long sludge scraping device. Reference numeral 124 denotes a drive wire (or a link chain) device for moving back and forth.

  FIG. 22 and FIG. 23 (sectional view taken along line XX in FIG. 22) show another example of a scum removing device with a scum scraping device, and a trough 130 is provided with a weir member 132 via a weir joint 131, A rotatable drive shaft 133 is mounted so as to pass above the weir member 132, and a copying plate 136 provided on the weir member 132 is provided with a drive roller 135 on a drive arm 134 provided around the drive shaft 133. In the structure in which the weir member 132 is pushed down by kicking, a drive sprocket 138 for scraping is provided around the drive shaft 133 in addition to the driven sprocket 137, while at the opposite side of the side wall 139 in front of the scum removing device. Rotating pipes 141 that rotate around a fixed shaft 140 are provided, and each of the rotating pipes 141 is provided with a rotating arm 142. Sag-like scum raking plates 143 between the arms 142 in which was mounted.

Then, the driven sprocket 144 for scraping provided on the outer periphery of one of the rotating pipes 141 is provided, and the interlocking chain 145 is spanned between the driving sprocket 138 for scraping, and the rotating pipe 141 is more than the driving shaft 133. Is rotating at a higher speed. Alternatively, the speed increasing chain mechanism 105 may be projected forward from the side of the scum, and a scum may be scraped by providing a rotation lever 107 around the drive shaft 106 at the tip thereof to drive the scraping plate 108 to rotate.
2, the scraping drive sprocket 38, the scraping driven sprocket 144, and the interlocking chain 145 may be provided on the other side wall 139 side.

  The rotating pipe 141 is rotated at a slightly increased speed in the counterclockwise direction in FIG. 23, and accordingly, the rotating arm 142 is also rotated in the same direction, whereby the scum scraping plate 143 is also rotated counterclockwise while being suspended. Then, when the scum scraping plate 143 comes downward, the scum of the water surface 146 is pushed in the direction of the arrow and sent in the direction of the scum removing device. The scraping driven sprocket 144 may be driven by a separate chain 147 from a unique drive source, as indicated by an imaginary line in FIG. For example, in the case where a long rotating pipe 141 is mounted between the side walls 139 and the scum scraping plate 143 protrudes directly on the outer periphery, the scum scraping plate 143 scrapes and rotates to lift the scum. Although these scums may adhere around the scraping plate 143 and the rotating pipe 141, in the case of the embodiment of FIGS. 22 and 23, since the scum scratching plate 143 is suspended, the scum is scum on the same plate surface. Since the scum scraping plate 143 is positioned and rotates between the short rotating pipes 141, there is no possibility that the scum adheres around the pipes 141. Reference numeral 148 denotes a water level tracking weir plate.

  The perspective view of the scum removal apparatus which shows one Embodiment of this invention.   II-II sectional view taken on the line of FIG.   III-III sectional view taken on the line of FIG.   IV-IV sectional view taken on the line of FIG.   The top view which shows other embodiment.   The perspective view which shows embodiment which can make a drive roller into a power cutting state.   The perspective view which shows other embodiment for scum crushing.   The cross-sectional view which shows other embodiment.   The cross-sectional view which shows other embodiment.   The cross-sectional view which shows other embodiment.   The cross-sectional view which shows other embodiment.   The cross-sectional view which shows other embodiment.   The top view which shows embodiment for scum scraping.   FIG. 14 is a cross-sectional view of FIG. 13.   The cross-sectional view which shows other embodiment for scum scraping.   The cross-sectional view which shows embodiment about the scum removal apparatus which can be inserted from front and back.   The cross-sectional view which shows other embodiment about the scum removal apparatus which can be inserted from front and back.   The cross-sectional view which shows embodiment which prevents the retention of a scum on a water level tracking board.   The top view which shows the proposal example about a monorail type sludge scraping apparatus.   FIG. 20 is a side sectional view of FIG. 19.   The sectional side view which shows embodiment about another monorail type sludge scraping apparatus.   The top view which shows other embodiment of the scum removal apparatus with a scum scraping apparatus.   XX sectional drawing of FIG.   The rear view which shows an example about the conventional scum removal apparatus.   The LL sectional view taken on the line of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1, 2, 3 ... Precipitation pond 8 ... Water surface 15 ... Trough 22 ... Weir member 31 ... Drive shaft 38 ... Drive roller 41 ... Copying plate 47 ... Drive source.

Claims (2)

In multiple rows of rectangular sedimentation ponds adjacent to each other, a plurality of scum horizontally connected to each other so as to be above and below the water surface and connected to each other so as to flow in one direction always flows in one direction. A fixed trough, and a plurality of weir members provided on each trough to move up and down with respect to the water surface so as to swallow the scum floating on the water surface during the lowering operation together with water and stop the swallowing during the ascending operation; Drive means for alternately moving the members up and down, wherein the drive means is configured to selectively move up and down a plurality of weir members by a drive means having a single drive source. The drive means extends along the upper side of the trough while penetrating the side wall, and is rotatably attached to and supported by the trough side and is driven to rotate by a drive source. A plurality of projecting projections at a longitudinal outer peripheral position corresponding to the weir member of the drive shaft and a drive arm in which the phases are shifted from each other in the circumferential direction, and a drive roller provided in each drive arm, A scum removing device , characterized in that a copying plate is provided on the upper side of the weir member to change the rotational movement of the driving roller to the vertical movement of the weir member . 2. The scum removing device according to claim 1, wherein the drive arm is provided so as to be switchable to an idle state around the drive shaft .

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