JP2019063805A - Solid-liquid separation system - Google Patents

Abstract

To provide a solid-liquid separation system capable of transferring much more tramp materials to an accumulation part.SOLUTION: A solid-liquid separation system is equipped with: a trough 3 extending toward a sand collection pit 42 in a basin bottom part 10; a space formation member 8 provided along the trough 3, having an upper end portion forming a closed space S2 and having a suction port 8b provided below the upper end portion; and a discharge port 7a discharging water in the space S2. The discharge port 7a discharges water at a discharge pressure of 0.05 MPa or more but 0.3 MPa or less, and the opening length W of the discharge port in a width direction is longer than that L of the suction port 8b in the same direction as above.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a solid-liquid separation system in which the contaminants contained in the received liquid are sedimented to the bottom, the sedimented contaminants are transferred to the accumulation unit, and the contaminants are removed from the accumulation unit.

  It is one of the solid-liquid separation systems that separates the individual contained in the liquid from the liquid, regardless of whether it is a settling basin or settling basin provided in a sewage treatment facility. The settling basin receives sewage or sewage such as rainwater, sinks the sand contained in the sewage to the bottom of the pond, transfers the sedimented sand to the sand collecting pit, and lifts the sand collected in the sand collecting pit It is removed by a pump. In addition, the sedimentation basin received the water from which sand was removed in the sedimentation basin, allowed the sludge contained in the received water to settle to the bottom of the pond, transported the sedimented sludge to the sludge pit, and collected it in the sludge pit The sludge is removed by a sludge pump. Furthermore, various solid-liquid separation systems are used other than sewage treatment facilities, for example, metal powder contained in factory drainage is transferred to a predetermined accumulation unit, and collected metal powder is removed by a pump etc. It is also conceivable to transport the soil and the like flowing into a reservoir such as a dam lake to a predetermined accumulation unit and remove the collected soil and the like by a pump or the like. Hereinafter, solids that can be separated from liquids by a solid-liquid separation system, such as sand and sludge contained in waste water, metal powders contained in industrial drainage, or earth and sand flowing into a reservoir with water, may be referred to as contaminants is there.

  In these solid-liquid separation systems, a discharge port is provided for discharging fluid toward the transport direction downstream of the contaminants, and the contaminant is transferred by discharging the fluid from the discharge port toward the deposited contaminants. Are known. In the aspect in which the fluid is discharged toward the deposited contaminants, the deposited contaminants may be rolled up by the discharged fluid. On the other hand, if the amount of fluid discharged from the discharge port is reduced in order to suppress the winding-up of the contamination, the contamination may not be sufficiently transported this time, and so on, so as to suppress the winding-up of the contamination. It is difficult to balance transport and contamination sufficiently. Therefore, there has been proposed a solid-liquid separation system in which the contaminating material is sufficiently transferred while suppressing the rolling up of the contaminating material (see, for example, Patent Document 1).

  The solid-liquid separation system described in Patent Document 1 includes, at a bottom portion such as a pond bottom portion, a groove extending toward an accumulation portion such as a sedimentation pit and opening upward, and a groove defining surface that defines the groove. On the other hand, it has a space forming member having a gap and disposed along the groove, and a discharge port for discharging a fluid. The space forming member is, for example, a lower side portion of the cylindrical body cut away, and an upper end portion forms a closed space, and a lower end has a suction port opened downward. The suction port is spaced from the bottom of the groove. The discharge port has, for example, a flat shape in which the height direction is collapsed and spreads in the width direction, and the fluid is discharged from the discharge port toward the downstream side in the transfer direction of the contaminants. In the solid-liquid separation system described in Patent Document 1, contaminants such as sand contained in dirty water or the like enter the gap between the groove defining surface and the space forming member and are deposited at the bottom of the groove. Then, when the fluid is discharged from the discharge port into the space of the space forming member, a pressure difference occurs between the inside and the outside of the space forming member, and the contaminants deposited on the bottom of the groove are sucked into the space from the suction port. Furthermore, in the space, the sucked contaminants are moved downstream in the transfer direction by the fluid flow and transferred to the accumulation portion. Contaminants moving in the space are less likely to come out of the space forming member in the part where the pressure difference is generated, and the rolling up of the contaminates is suppressed. Therefore, it is possible to suppress the rolling up of sand while sufficiently transporting the contaminants. The contaminants transferred to the accumulation unit are removed from the accumulation unit by a removal means such as a pump.

JP, 2014-24055, A

  By the way, in the solid-liquid separation system described in Patent Document 1, the end on the accumulation unit side in the groove, the end on the accumulation unit side in the space forming member, and the inlet end on the groove side in the accumulation unit coincide with each other. The fluid discharged from the outlet diffuses into the space of the accumulation part immediately after reaching the accumulation part. For this reason, in the vicinity of the accumulation portion of the space formation member, the pressure difference between the inside and the outside of the space formation member becomes small and the suction force decreases, and the mixture moves toward the accumulation portion in the space of the space formation member It has been found that some of the material may come out of the suction port into the groove before reaching the accumulation unit, and the contaminants may not reach the accumulation unit.

  An object of the present invention is to provide a solid-liquid separation system capable of transferring more contaminants to the accumulation unit.

The solid-liquid separation system according to the present invention for solving the above-mentioned objects causes the contaminants contained in the received liquid to settle to the bottom, transfers the sedimented contaminants to the accumulation unit, and the contaminants from the accumulation unit A solid-liquid separation system for removing
A groove extending toward the accumulation portion at the bottom and opening upward,
A space forming member provided along the groove, forming a closed space at the upper end, and provided with a suction port below the upper end and spaced from the bottom of the groove;
And a discharge port for discharging the fluid in the space toward the downstream side in the transfer direction of the contaminants,
The discharge port discharges the fluid at a discharge pressure of 0.05 MPa or more and 0.3 MPa or less, and the opening length in the width direction is longer than the opening length in the width direction of the suction port. I assume.

  According to the solid-liquid separation system of the present invention, it is possible to provide a solid-liquid separation system capable of transferring more contaminants to the accumulation unit.

It is the top view which looked at the sedimentation basin equivalent to one Embodiment of this invention from upper direction. It is AA sectional drawing of the sedimentation basin shown in FIG. (A) is BB sectional drawing of the sedimentation basin shown in FIG. 2, (b) is CC sectional drawing of (a). (A) is a top view of a discharge member, (b) is the side view which looked at the discharge member shown to (a) from the downward direction. (A) is a front view (figure seen from the downstream side) of an auxiliary trough, (b) is the side view which looked at the auxiliary trough shown to (a) from the left side. (A) is a front view (figure seen from the downstream side) of an auxiliary space formation member, (b) is the side view which looked at the auxiliary space formation member shown to (a) from the left side. It is DD sectional drawing of the sedimentation basin shown in FIG. (A) is EE sectional drawing of the sedimentation basin shown in FIG. 2, (b) is an expanded sectional view which expands and shows the F section enclosed by the circle in the sedimentation basin shown in FIG. (A) is a figure which expands and shows G part which encloses the sand gathering pit of the sedimentation basin shown in FIG. 1 and its peripheral part with a circle, (b) is HH sectional drawing of (a), (C) is an I-I cross-sectional view of (a), (d) is a perspective view of the wedge member shown in (a) as viewed from the upper left on the upstream side. It is a figure which shows the modification of a partition member. It is a figure which shows the modification of the space formation member shown in FIG.8 (b). (A) And (b) is a figure which shows a mode corresponding to FIG.9 (c) and the figure (d) about the 1st modification of the wedge member shown in FIG. It is a figure which shows a mode corresponding to FIG. 9 about the 2nd modification of the wedge member shown in FIG. 9, and the modification of the 2nd support plate shown in FIG. In the wedge member of the second modification shown in FIG. 13 and the second support plate of the variation, the aspect in which the wedge member of the second modification is the third variation corresponds to FIGS. 13 (a) to 13 (c). FIG. (A) is a cross-sectional view in the width direction in a mode in which a plurality of troughs and a plurality of space forming members are connected in the transfer direction and a plurality of discharge members are provided in the transfer direction. It is -N sectional drawing. It is a figure which shows the modification of the discharge port which changed the shape and position with respect to the discharge port shown to Fig.3 (a) or FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The solid-liquid separator according to the present invention is an apparatus for removing sediments and sedimentation tanks in a sewage treatment facility, metal powder and the like contained in industrial wastewater, and sediment and the like installed in a reservoir such as a dam lake. Can be adopted in the device for removing In the present embodiment, the present invention will be described using an example in which a settling basin is adopted. This sediment settling basin is disposed upstream of the sewage treatment facility, and after settling sand contained in sewage or sewage such as rainwater, the sedimented sand is moved to a sand collecting pit and removed from the sewage.

  FIG. 1 is a plan view of a sand settling basin 1 corresponding to an embodiment of the present invention as viewed from above, and FIG. 2 is a cross-sectional view of the sand settling basin 1 shown in FIG.

  As shown in FIG. 1, the sediment settling basin 1 is a pond having a rectangular shape in a plan view provided with a dust collector 2, a trough 3 and a sand collecting pit 42. Hereinafter, the long side direction of the sedimentation basin 1 may be referred to as the longitudinal direction, and the short side direction may be referred to as the width direction. The sediment settling basin 1 shown in FIG. 1 receives waste water from the left side of the figure, and the received water flows slowly toward the right side of the figure (see arrows shown in FIGS. 1 and 2). That is, the longitudinal direction of the sedimentation basin 1 is the direction of the flow of water, and in FIGS. 1 and 2, the left side of the figure is the upstream side and the right side is the downstream side.

  The dust remover 2 is for removing stone blocks and sediments having a predetermined size or more out of contaminants mixed in the wastewater flowing into the sedimentation tank 1, and the trough 3 and sand collecting pits. It is installed upstream of 42. The dust remover 2 has an endless chain 21, a plurality of rake 22 attached to the endless chain 21 at intervals, and a filtration screen 23 submerged in water. The endless chain 21 is provided in a state of being erected obliquely on both sides in the width direction of the sand settling basin 1, and as shown in FIG. 2, it is wound around the ground side sprocket 211 and the pond bottom side sprocket 212. There is. When the endless chain 21 is driven, the rake 22 moves in and out of the water. The filtration screen 23 is disposed downstream of the endless chain 21. In the filtration screen 23, bars extending in the vertical direction are arranged at a predetermined interval (for example, 25 mm to 75 mm) to block passage of contaminants having a size equal to or greater than the predetermined interval. In the present embodiment, vertically extending bars are arranged at intervals of 75 mm. The contaminants blocked by the filtration screen 23 are scraped off by the lake 22, and the scraped contaminants are placed on the ground side on a conveying means such as a belt conveyor (not shown) on the ground side.

  On the downstream side of the dust remover 2, an upstream pond bottom 10a, a sand collecting pit 42, and a downstream pond bottom 10b are provided in the order listed from the upstream side to the downstream side. Hereinafter, when it is not necessary to distinguish between the upstream pond bottom 10a and the downstream pond bottom 10b, it may be collectively referred to as a pond bottom 10. WL shown in FIG. 2 represents the surface of the sewage. The position of the water surface WL changes, for example, in the range from 1 m to 5 m from the height of the pond bottom 10 depending on the amount of sewage flowing into the sedimentation basin 1. The sand in the sewage flowing into the sedimentation basin 1 settles in the pond bottom 10 and the sand collecting pit 42, and the sand settled in the pond bottom 10 is a sand collecting pit by water discharged from the discharge port 7a as described later. Transfer to 42 As a result, the sand in the sewage flowing into the sedimentation basin 1 is collected in the sand collection pit 42. That is, the direction from the discharge port 7a toward the sand collecting pit 42 corresponds to the transfer direction, and in the sediment settling basin 1 shown in FIGS. 1 and 2, the right direction becomes the transfer direction in the upstream pond bottom 10a, and the downstream pond In the bottom portion 10b, the left direction is the transfer direction. In addition, the pond bottom 10 corresponds to an example of the bottom, the sand collecting pit 42 corresponds to an example of the accumulation section, and sand in the sewage flowing into the sedimentation basin 1 is a contaminant contained in the received liquid. It corresponds to an example.

  The pond bottom portion 10 is provided with inclined surfaces 41 and 41 inclined downward from both sides in the width direction toward the center in the width direction, and the trough 3 is provided to be connected to the inclined surfaces 41 and 41. In the present embodiment, the inclined surface 41 is formed by placing concrete. The trough 3 corresponds to a groove extending toward the sand collecting pit 42 and opening upward in the pond bottom portion 10. On the upstream side of the trough 3 provided on the upstream side pond bottom portion 10a and on the downstream side of the trough 3 provided on the downstream side pond bottom portion 10b, a discharge member 7 provided with a discharge port 7a described later in detail is provided ing. Further, the downstream side of the trough 3 provided in the upstream side pond bottom portion 10a and the upstream side of the trough 3 provided in the downstream side pond bottom portion 10b are connected to the sand collecting pit 42. A space forming member 8 is provided in the trough 3. The space forming member 8 extends along the trough 3 and is provided at the downstream end of the space forming member 8 provided in the upstream pond bottom 10a and in the space provided in the downstream pond bottom 10b. Each upstream end of the forming member 8 projects into the sand collecting pit 42. The detailed description about the trough 3 and the space formation member 8 is mentioned later.

  A sand raising pump 51 is provided in the sand collecting pit 42. The sand raising pump 51 is disposed at the bottom of the sand collecting pit 42 and transports the sand collected in the sand collecting pit 42 to the outside of the sedimentation basin 1. The sand pump 51 is detachably connected to the sand pipe 52 (see FIG. 1), and the sand sucked into the sand pump 51 from the suction port located in the vicinity of the bottom surface of the sand collecting pit 42 is It is sent to the outside of the sedimentation basin 1 through the sand pumping pipe 52. That is, the sand raising pump 51 corresponds to an example of the removing means. The sand pump 51 can be pulled up from the sand collecting pit 42 to the ground for maintenance or the like by removing it from the sand tube 52 with the wire attached to the upper end portion and then pulling up the wire. Further, the weir member 6 is attached to the sand raising pump 51. When the sand pump 51 is pulled up to the ground, the wedge member 6 can also be pulled up to the ground together. The wedge member 6 corresponds to an example of a surrounding member, and the detailed description will be described later. Further, inside the sand collecting pit 42, a stirring member 53 for discharging water toward the lower side of the suction port of the sand raising pump 51 is provided. The stirring member 53 discharges water toward the sand deposited under the suction port of the sand pump 51 and disturbs the sand deposited under the suction port, whereby the suction port of the sand pump 51 is blocked. It prevents the peeling and promotes the suction of sand.

  A pump well (not shown) is provided further downstream than the downstream pond bottom 10b. In the pump wells, waste water from which sand has been removed is stored. A pumping pump is provided inside the pump well, and the sewage sucked by the pumping pump is sent to a sedimentation tank (not shown).

  Next, the configuration of the discharge member 7 and the periphery where the discharge member 7 is disposed will be described with reference to FIGS. 3 to 6. The upstream pond bottom portion 10 a and the downstream pond bottom portion 10 b are configured symmetrically with the sand collecting pit 42 interposed therebetween. Therefore, in the following description, when the configuration provided in the upstream pond bottom portion 10a and the configuration provided in the downstream pond bottom portion 10b are common, the configuration provided in the upstream pond bottom portion 10a is taken as an example. It mentions and demonstrates and description of the structure provided in the downstream pond bottom part 10b may be abbreviate | omitted.

  Fig.3 (a) is BB sectional drawing of the sedimentation basin 1 shown in FIG. 2, FIG.3 (b) is CC sectional drawing of the figure (a). In FIG. 3A, the lateral direction of the figure is the width direction, and the direction from the back side of the figure toward the near side of the figure is the transfer direction. Further, in FIG. 3B, the right direction in the drawing is the transfer direction.

  As shown in FIG. 1, FIG. 2 and FIG. 3 (a), the discharge member 7 is connected to a water supply pipe 70 at its rear end, and has a discharge port 7a at its tip. Water supplied from the water supply pipe 70 to the discharge member 7 is discharged from the discharge port 7a in the transfer direction. In the present embodiment, the discharge flow velocity of water discharged from the discharge port 7a is set to 8 m / sec or more, and the discharge pressure is set to 0.05 MPa or more and 0.3 MPa or less. Further, as described later, in the present embodiment in which the total length of the trough 3 is set to about 10 m, the flow rate of water discharged from the discharge port 7 a is adjusted to about 2000 liters per minute. Here, when the total length of the trough 3 is set to about 5 m, the flow rate of water discharged from the discharge port 7 a is adjusted to about 1500 liters per minute. As described above, the flow rate of water discharged from the discharge port 7 a may be appropriately adjusted in accordance with the total length of the trough 3 and the like. The water discharged from the discharge port 7a may use the waste water received in the waste water treatment site, but may be other fluid.

  Further, as shown in FIGS. 3A and 3B, the auxiliary trough 30, the auxiliary space forming member 80, and the first support plate 91 are provided in the area where the discharge member 7 is disposed. The auxiliary trough 30 has the same cross-sectional shape as the trough 3 in the width direction, but has a length in the transport direction much shorter than that of the trough 3 (see FIGS. 1 and 2). Further, the auxiliary space forming member 80 also has the same cross-sectional shape in the width direction as the space forming member 8, but the length in the transfer direction is significantly shorter than that of the space forming member 8 (see FIGS. 1 and 2) Furthermore, compared with the auxiliary trough 30, the length in the transfer direction is about half. The auxiliary trough 30 and the auxiliary space forming member 80 are fixed on the upstream side in the transfer direction of the first support plate 91 by a fastening member 913 consisting of a bolt and a nut. The trough 3 and the space forming member 8 are fixed by welding on the downstream side of the first support plate 91 in the transfer direction.

  4 (a) is a plan view of the discharge member 7, and FIG. 4 (b) is a side view of the discharge member 7 shown in FIG. 4 (a) as viewed from below. In FIG. 4A, the vertical direction is the width direction, and in FIG. 4B, the direction orthogonal to the paper surface is the width direction, and the right direction is the transfer direction. As shown in FIG. 4A and FIG. 4B, the discharge member 7 is configured by connecting two L-shaped pipes 71 and 72, a straight pipe 73 and a nozzle portion 74. In the present embodiment, the nozzle portion 74 is formed by crushing a round pipe into a flat shape, and the discharge port 7a is formed at the tip thereof. If the embodiment in which the round pipe is squeezed into a flat shape to form the nozzle portion 74 in this manner, the manufacture thereof is facilitated. The straight pipes 73 are provided with mounting pieces 731 and 731 extending outward in the width direction.

  Fig.5 (a) is a front view (figure seen from the downstream side) of the auxiliary trough 30, and the figure (b) is the side view which looked at the auxiliary trough 30 shown to the figure (a) from the left side. . In FIG. 5A, the lateral direction of the figure is the width direction, and in FIG. 5B, the right direction of the figure is the transfer direction. As shown in FIG. 5 (a) and FIG. 5 (b), the auxiliary trough 30 has a shape in which the upper portion of the round pipe is cut out, like the trough 3 described later in detail. Further, the auxiliary trough 30 is provided with a plate-like flange portion 31 at an end portion on the downstream side in the transfer direction (right side in FIG. 5B). The flange portion 31 is formed with a bolt hole 31 a through which a bolt fixed to the first support plate 91 is passed. The auxiliary trough 30 corresponds to a groove in the same manner as the trough 3, and the groove defining surface 30a defining the groove is provided with a pair of support pieces 32, 32 extending inwardly in the width direction.

  FIG. 6 (a) is a front view (a view from the downstream side) of the auxiliary space forming member 80, and FIG. 6 (b) is a view from the left of the auxiliary space forming member 80 shown in FIG. It is a side view. In FIG. 6 (b), the right direction of the figure is the transfer direction. As shown in FIGS. 6 (a) and 6 (b), the auxiliary space forming member 80 has a shape in which the lower portion of the round pipe is cut out in the same manner as the space forming member 8 described later in detail. Further, the auxiliary space forming member 80 is provided with a plate-like flange portion 81 at an end portion on the downstream side in the transfer direction (right side in FIG. 6B). The flange portion 81 is formed with a bolt hole 81 a for passing a bolt fixed to the first support plate 91.

  As shown in FIG. 3A and FIG. 3B, the auxiliary trough 30 has four flanges 31 in the present embodiment, with the flange portion 31 joined to the surface of the first support plate 91 on the downstream side in the transfer direction. It is fixed to the first support plate 91 by a fastening member 913. Further, the auxiliary space forming member 80 is fixed to the first support plate 91 by the five fastening members 913 in the present embodiment in a state where the flange portion 81 is joined to the downstream surface of the first support plate 91 in the transfer direction. ing. By these, the device which does not produce a clearance carelessly between the auxiliary | assistant trough 30 and the auxiliary | assistant space formation member 80, and the 1st support plate 91 is made. Furthermore, as described above, the trough 3 is fixed to the surface on the upstream side in the transfer direction of the first support plate 91, and the auxiliary trough 30 and the trough 3 are continuous in the transfer direction with the first support plate 91 interposed therebetween. Are connected in the In addition, the space forming member 8 is fixed to the surface of the first support plate 91 on the upstream side in the transfer direction, and the auxiliary space forming member 80 and the space forming member 8 are also continuous in the transfer direction with the first support plate 91 interposed therebetween. Are connected in the

  The discharge member 7 is fixed to the auxiliary trough 30 by the fastening member 732 in a state where the mounting piece 731 is mounted on the support piece 32 of the auxiliary trough 30. As a result, as shown in FIG. 3B, the discharge port 7a is disposed at a position where it enters the auxiliary space forming member 80, and in the present embodiment, as shown by the solid arrow, the transfer direction from the discharge port 7a The discharge member 7 is supported in a posture in which water is discharged in a substantially horizontal direction. When the auxiliary space forming member 80 is removed from the first support plate 91 and the discharge member 7 is removed from the auxiliary trough 30 and the water supply pipe 70, the discharge port 7a which has entered the auxiliary space forming member 80 is used as an auxiliary space forming member. It can be taken out from the inside of 80. Thus, for example, when the discharge port 7a is clogged with contaminants, maintenance such as removing the contaminants can be performed.

  As shown in FIG. 3A, the first support plate 91 is a plate member whose lower portion is rectangular and whose upper portion has a trapezoidal outer shape. In the figure, the part 911 embedded in the cast concrete is indicated by cross hatching. Further, of the space S10 (see FIG. 3B) in the auxiliary trough 30 and the space S1 in the trough 3 of the first support plate 91, the space S20 in the auxiliary space forming member 80 (see FIG. 3B). And the space S2 of the space forming member 8 are continuous with each other, the first opening 91a is formed, and further, the second opening 91b is formed in the lower portion in a donut shape of about 1/3. Thus, of the space S1 in the trough 3 and the space S10 in the auxiliary trough 30, parts other than the first opening 91a and the second opening 91b are partitioned by the first support plate 91 in the transfer direction. This partitioned portion is indicated by hatching with a large interval in the figure, and may be hereinafter referred to as a first partition portion 912. The auxiliary space forming member 80 is supported by the first support plate 91 by fixing the auxiliary space forming member 80 to the surface on the upstream side in the transfer direction of the first partition portion 912 by the fastening member 913. Further, the space forming member 8 is fixed to the surface of the first partition portion 912 on the downstream side in the transfer direction by welding so that the space forming member 8 is supported by the first support plate 91. The first support plate 91 is a plate having a thickness of about 3 mm provided along the direction (vertical direction in the present embodiment) intersecting the extending direction of the space forming member 8 and is perpendicular to the thickness direction (height The length in the thickness direction is shorter than the length in the longitudinal direction). Thus, contaminants such as sand are less likely to be deposited on the first support plate 91, and string-like contaminants are less likely to be wound around. That is, the first support plate 91 corresponds to an example of the support member.

  The first support plate 91 is disposed at a position close to the discharge port 7a in the transfer direction, and the water discharged from the discharge port 7a passes through the first opening 91a of the first support plate 91 in a strong state. As a result, compared with the second support plate 92 described later, which supports the downstream end portion of the space forming member 8 in the transfer direction, the first support plate 91 has a relatively adverse effect due to the space S1 in the trough 3 being partitioned. small. For this reason, in the present embodiment, emphasis is placed on the support of the space forming member 8 and the auxiliary space forming member 80, and the second opening 91b of the first support plate 91 is a donut shaped opening of about 1/3. A mode is employed in which a portion for fixing the space 8 and the auxiliary space forming member 80 is sufficiently secured.

  Further, the first partition portion 912 has a portion located above the space forming member 8 and the auxiliary space forming member 80. Hereinafter, a portion of the first partition portion 912 located above the space forming member 8 and the auxiliary space forming member 80 may be referred to as a partition portion 9121. In FIG. 3A, the partition portion 9121 is distinguished from the other portions by using an alternate long and short dash line. When a stone mass R (indicated by a two-dot chain line in the figure) larger than the distance C between the auxiliary trough 30 and the auxiliary space forming member 80 is received in the sedimentation basin 1, the upper edge of the groove defining surface 30a in the auxiliary trough 30 And the auxiliary space forming member 80 may be caught. In the present embodiment, such a large stone mass R can be blocked by the partition portion 9121 particularly in the first partition portion 912 of the first support plate 91. That is, at least the partition portion 9121 of the first partition portion 912 of the first support plate 91 corresponds to a partition member.

  FIG. 7: is DD sectional drawing of the sedimentation basin 1 shown in FIG. In FIG. 7, the lateral direction is the width direction, and the direction from the back side to the front side of the sheet is the transfer direction. Further, in FIG. 7, in order to simplify the drawing, only the discharge port 7a of the discharge member 7 is shown, and the first support plate 91 is omitted.

  As shown in FIG. 7, the inclined surfaces 41 provided on both sides in the width direction of the trough 3 are inclined downward about 30 degrees toward the trough 3. The trough 3 has a space S1 formed therein and has an arc-like groove defining surface 3a that defines a groove, and has an upper edge 3b at the upper end portion of the groove defining surface 3a. Further, the trough 3 has a shape in which approximately one-third of the upper part of a stainless steel cylinder having a total length of 10 m, a diameter of 300 mm, and a plate thickness of about 3 mm is cut away and opens upward. Hereinafter, the part opening upward is referred to as the opening of the trough 3. In addition, the cross-sectional shape of the width direction of the trough 3 is not restricted to circular arc shape, U shape, V shape, etc. may be sufficient.

  The space forming member 8 divides the space S1 in the trough 3 and forms a space S2 in which a portion above the lower end is closed. The space forming member 8 has a shape of a stainless steel cylinder with a diameter of 150 mm and a plate thickness of about 3 mm cut away approximately 1/6 and has an arc-shaped side surface 8a and is directed downward. It is open. Hereinafter, the open portion is referred to as a suction port 8b. The suction port 8b is an opening having an opening length L in the width direction, and in the present embodiment, the opening length L in the width direction of the suction port 8b is a bar of the filtration screen 23 of the dust collector 2 (see FIGS. The distance is set to, for example, about 80 mm, which is larger than the interval 2). The size of the opening length L in the width direction of the suction port 8b is not particularly limited, but in order to prevent the contaminants passing through the filter screen 23 from clogging the suction port 8b, the size of the suction port 8b is not limited. It is preferable to set the opening length L in the width direction to be equal to or greater than the bar interval (mesh width) in the filtration screen 23 of the dust collector 2. In the present embodiment, the lower end portion of the space S2 connected to the suction port 8b is narrower as it approaches the suction port 8b. In order to adopt this aspect, the opening length of the suction port 8b in the width direction L may be smaller than the diameter of the space forming member 8. Although the details will be described later, the space forming member 8 has a total length slightly longer than the total length of the trough 3.

  As described above, the space forming member 8 is supported at its upstream end in the transfer direction by the first support plate 91 (see FIG. 3), and its downstream end in the transfer direction is the second described later in detail. It is supported by a support plate 92 (see FIG. 8). As shown in FIG. 7, in the present embodiment, the radial center of the space forming member 8 is made to coincide with the radial center of the trough 3. Therefore, the distance C between the trough 3 and the space forming member 8 in the radial direction is substantially the same at any location, and in the present embodiment, 80 mm or more is secured. As described above, as with the opening length L in the width direction of the suction port, the spacing C between the trough 3 and the space forming member 8 is also secured at least the eye width (75 mm here) of the filtration screen 23. It is suppressed that the contaminant which has passed through the filter member of (2) is clogged in the interval C. Further, in the present embodiment, since the center of the space forming member 8 in the radial direction is matched with the center of the trough 3 in the radial direction, the interval C equal to or larger than the eye width of the filtration screen 23 is secured at any location. It becomes easy.

  The sand contained in the sewage flowing into the sedimentation basin 1 settles in the pond bottom portion 10 and the sand collecting pit 42 in a process in which the sewage flows downstream. Of the sand that has settled in the upstream pond bottom 10a, sand that has settled on the inclined surface 41 flows further down the inclined surface 41 toward the trough 3 as shown by the straight arrows in the figure, and the opening of the trough 3 Into the gap between the trough 3 and the space forming member 8. Although sand also settles on the space forming member 8, it is difficult to deposit sand because it is arc-shaped, and sand which has settled on the space forming member 8 forms a space with the trough 3 through the arc-shaped side surface 8a. It enters into the gap with the member 8. Therefore, the sand which has settled to the upstream pond bottom 10 a is deposited in the trough 3. In addition, when a stone mass R or the like larger than the distance C between the trough 3 and the space forming member 8 flows in, it is caught between the upper edge 3 b of the groove defining surface 3 a and the space forming member 8 . In the present embodiment, since the dust remover 2 is provided on the upstream side of the sedimentation basin 1, a stone block R or the like which is larger than the mesh width of the filter screen 23, that is, the space C between the trough 3 and the space forming member 8 is There is little possibility of passing through the filter screen 23 and flowing into the upstream pond bottom 10a. However, depending on the direction of the stone block when passing through the filter screen 23, the stone block R having a size that is caught between the upper edge 3 b of the trough 3 and the space forming member 8 may be carelessly filtered. And may flow into the upstream pond bottom 10a. Moreover, when the dust remover 2 is provided not on the upstream side of the sedimentation basin 1 but on the downstream side, a stone block R or the like larger than the distance C between the trough 3 and the space forming member 8 may flow in Get higher.

  As shown in FIG. 7, in the present embodiment, the discharge port 7 a is disposed such that the position as viewed in the transfer direction is at the center of the space S2 in the space forming member 8. As described above, the discharge port 7a is a long hole formed by crushing the end of the pipe-like water supply pipe flat, and the opening length W in the width direction is the width direction of the suction port 8b. It is set longer than the opening length L of. Specifically, the opening length W in the width direction of the discharge port 7a in the present embodiment is about 120 mm, and the height H thereof is about 20 mm. By making the discharge port 7a into such a flat shape, it is possible to secure a wider range in which the flow velocity is increased than that of a perfect circular shape. Note that the opening length in the width direction of the discharge port 7a can be increased to the inside of the space forming member 8 as shown by a two-dot chain line in the drawing. However, as the opening length in the width direction of the discharge port 7a is increased, the gap with the auxiliary trough 30 (see FIG. 3) becomes smaller, dust and the like are easily clogged in the gap, and the discharge member When removing 7 (see FIG. 3), there may be a disadvantage that the auxiliary trough 30 may be interfered. For this reason, it is preferable to determine the opening length W in the width direction of the discharge port 7a within a range where such a problem does not occur. Water is discharged from the discharge port 7 a in parallel or substantially parallel to the axial center of the space forming member 8. That is, water is discharged in the horizontal direction or in the substantially horizontal direction (see the arrow directed to the right of the solid line in FIG. 3B).

  Water was discharged from the discharge port 7a into the space S2 of the space forming member 8, so that a pressure difference occurred between the inside (space S2) and the outside of the space forming member 8, and the water was deposited in the trough 3 (space S1). The sand is sucked into the space S2 from the suction port 8b as indicated by the curved arrow shown in FIG. Furthermore, in the space S2 of the space forming member 8, the sucked sand moves toward the sand collecting pit 42 (see FIGS. 1 and 2) by the flow of water discharged from the discharge port 7a. By the way, although the suction port 8b of the space formation member 8 functions as a suction port which sucks sand deposited in the trough 3 into the space S2 by discharging water from the discharge port 7a, the discharge port 7a Depending on the shape of the nozzle and the relationship with the size of the discharge port 7a, it may function as a discharge port for discharging the sand sucked into the space S2 by the force of the fluid discharged from the discharge port 7a. In the present embodiment, since the opening length W in the width direction of the discharge port 7a is longer than the opening length L in the width direction of the suction port 8b, compared with the suction force for sucking something from the suction port 8b into the space S2. The spouting force for spouting the sand in the space S2 from the suction port 8b is relatively weakened. Thus, the suction port 8 b can be prevented from functioning as a spout port that spits out the sand in the space S 2, and sand can be sufficiently sent to the sand collection pit 42. Even if the opening length W in the width direction of the discharge port 7a is smaller than the opening length L in the width direction of the suction port 8b, the sand accumulated in the trough 3 is sucked into the space S2 from the suction port 8b. You can However, as described above, when the suction port 8b functions as a discharge port, sand moving in the space S2 may come out of the suction port 8b before reaching the sand collecting pit 42. is there. For this reason, in order to move sand further, it is preferable to make the opening length W of the width direction of the discharge port 7a longer than the opening length L of the width direction of the suction port 8b.

  In the present embodiment, the position in the height direction of the discharge port 7a is disposed at the center of the space S2 of the space forming member 8, and as shown in FIG. 3B, the horizontal direction or substantially horizontal from the discharge port 7a. Although the structure for discharging water in the direction is adopted, the position in the height direction of the discharge port 7a is lower than the center of the space S2 of the space forming member 8 as shown by the one-dot chain line in FIG. It is also possible to adopt a configuration in which water is discharged from the discharge port 7a slightly upward. This makes it possible to improve the suction force for sucking sand from the suction port 8b into the space S2, particularly in the vicinity of the discharge port 7a.

  Moreover, especially when there is a large amount of sand deposited in the space S1 of the trough 3, the sand deposited outside the space S2 moves toward the sand collecting pit 42 along with the movement of the sand in the space S2 of the space forming member 8 Do. The rock mass R caught between the upper edge 3 b of the trough 3 and the space forming member 8 may also move toward the sand collecting pit 42 so as to be dragged by the movement outside the space S 2.

  Next, with reference to FIG. 8, the structure of the downstream end of the trough 3 in the transfer direction and the structure of the downstream end of the space forming member 8 in the transfer direction, and the second support plate 92 for supporting them will be described. .

  Fig.8 (a) is EE sectional drawing of the sedimentation basin 1 shown in FIG. 2, FIG.8 (b) is an expanded cross section which expands and shows the part F enclosed by the circle in the sedimentation basin 1 shown in FIG. FIG. In FIG. 8A, the lateral direction is the width direction, and the wedge member 6 described later is omitted in detail. In FIG. 8B, the right direction is the transfer direction.

  As shown in FIG. 8A and FIG. 8B, the second support plate 92 is a rectangular plate. Further, as shown in FIGS. 1, 2 and 8B, the second support plate 92 is provided at a position where the surface on the downstream side in the transfer direction faces the sand collecting pit 42, as shown in FIG. In the), the cast concrete is present on the transfer direction upstream side (the back surface side in FIG. 8A) of the portion 921 indicated by cross hatching. As shown in FIG. 8 (b), the space forming member 8 penetrates the second support plate 92 in the transfer direction, and the end on the sand collecting pit 42 side is the sand collecting pit 42 than the second support plate 92. Projecting inward, that is, the space forming member 8 projects more to the sand collecting pit 42 side (transfer direction) than the end of the trough 3 on the sand collecting pit 42 side. Hereinafter, the portion of the space forming member 8 protruding into the sand collecting pit 42 may be referred to as a protruding portion 8 c. The space forming member 8 is supported by the second support plate 92 by being fixed by welding while penetrating the second support plate 92.

  By the way, when the end on the sand collecting pit 42 side of the space forming member 8 is aligned with the end on the sand collecting pit 42 side of the trough 3, the water discharged from the discharge port 7 a reaches the sand collecting pit 42 Immediately after, it diffuses into the space of the collecting pit 42. For this reason, in a portion near the sand collecting pit 42 of the space forming member 8, the pressure difference between the inside and the outside of the space forming member 8 becomes small and the suction force decreases, and the sand collecting pit in the space S2 of the space forming member 8 It has been found that, before reaching the collecting pit 42, part of the sand moving toward 42 may come out of the suction port 8b and the sand may not reach the collecting pit 42. Since the space forming member 8 of the present embodiment has the projecting portion 8c, as shown by the most upstream arrow among the arrows of the three curves showing the flow of water in FIG. Even when the sand moving in the S2 toward the sand collecting pit 42 falls from the suction port 8b on the upstream side of the downstream end of the space forming member 8, the sand collecting pit 42 The structure which makes it easy to reach it is adopted. Thereby, in the present embodiment, more sand can be transferred to the sand collection pit 42.

  In the second support plate 92, like the first support plate 91, in the space S1 in the trough 3, a first opening 92a is formed in a region where the space S2 of the space forming member 8 is connected to the sand collecting pit 42, Furthermore, the second opening 92 b is formed in a donut shape of about 1⁄2 in the lower portion. As a result, in the space S1 in the trough 3, parts other than the first opening 92a and the second opening 92b are partitioned by the second support plate 92 in the transfer direction. This partitioned portion is indicated by hatching with a large interval in the figure, and may be hereinafter referred to as a second partition portion 922. The space forming member 8 is supported in a state of penetrating the second partition portion 922. Similarly to the first support plate 91, the second support plate 92 is also a plate material having a thickness of about 3 mm provided along the direction (vertical direction in the present embodiment) intersecting the extension direction of the space forming member 8, The length in the thickness direction is shorter than the length in the direction (height direction) orthogonal to the thickness direction. As a result, contaminants such as sand are less likely to be deposited on the second support plate 92, and string-like contaminants are less likely to be wound around. That is, the second support plate 92 also corresponds to an example of the support member. The first support plate 91 and the second support plate 92 may be inclined with respect to the vertical direction.

  As described above, the momentum of the water discharged from the discharge port 7 a relatively weakens toward the downstream side, so in the second support plate 92 of the present embodiment, the water is more supported than the space forming member 8 is supported. Of the second opening 92 b is set larger than the second opening 91 b of the first support plate 91.

  In addition, the second partition portion 922 also has a partition portion 9221 positioned above the space forming member 8 as shown by being distinguished by an alternate long and short dash line in FIG. 8A. Even if a stone mass R larger than the distance C between the auxiliary trough 30 and the auxiliary space forming member 80 flows, it can be blocked particularly by the partition portion 9221. That is, at least the partition portion 9221 in the second partition portion 922 of the second support plate 92 corresponds to a partition member. Further, the partition portion 9221 is formed larger than the partition portion 9121 of the first support plate 91 shown in FIG. This is a large stone block immediately before the sand collection pit 42 in order to prevent the sand pump 51 (see FIGS. 1 and 2) disposed in the sand collection pit 42 from being clogged with contaminants such as large stone blocks. The intention is to hold back R firmly. In addition, as shown to FIG. 2 and FIG. 3 (a), the partition part 9121 of the 1st support plate 91 is the height of the upper end 41a (refer FIG. 9 (a), FIG.13 (c) etc.) of the inclined surface 41. The height position of the upper end 41a of the inclined surface 41 is provided even at the partition portion 9221 of the second support plate 92, provided at a position lower than the position, as shown in FIGS. 2 and 8A. It is provided at a lower position. Here, when the flow of water is stopped in the transfer direction, the flow velocity of the water is increased at that portion, and the problem that sand is difficult to settle occurs. Therefore, the heights of the partition portions 9121 and 9221 are limited by the partition portions 9121 and 9221 so as not to block the flow of water more than necessary.

  The downstream side pond bottom portion 10 b has a symmetrical configuration with the upstream side pond bottom portion 10 a described above by way of example and the sand collecting pit 42 interposed therebetween. Therefore, the discharge port 7a in the downstream side pond bottom portion 10b is disposed at the downstream end of the downstream side pond bottom portion 10b, and water is discharged from the discharge port 7a toward the upstream side. Thereby, the discharge direction of water of the discharge port 7a, that is, the transfer direction is opposite to that of the upstream pond bottom 10a, and sand moves from the downstream side to the upstream side in the space S2 in the space forming member 8 Collected in sand collecting pit 42. In addition, when a large contaminant flows into the sedimentation basin 1, there is a high possibility of settling in the upstream pond bottom 10a, and the downstream pond bottom 10b is larger than the distance C between the trough 3 and the space forming member 8 The possibility that stone blocks R etc. will flow in is low. Further, even if a large stone block R or the like is sandwiched between the trough 3 and the space forming member 8 at the downstream side pond bottom 10b, the water flow from the upstream side to the downstream side, so the sandwiched stone The lump R and the like are difficult to move to the sand collecting pit 42. For this reason, in the downstream side pond bottom portion 10b, it is also possible to adopt a mode in which the partition portion 9121 of the first support plate 91 shown in FIG. 3A is omitted or the area is reduced, and FIG. A mode may be adopted in which the partitioning portion 9221 of the second support plate 92 shown in FIG.

  Furthermore, as shown in FIG. 1, FIG. 2 and FIG. 8 (b), in the present embodiment, partition portions 9121 and 9221 are used as a device to suppress clogging of the sand pump 51 with contaminants such as large stone blocks. In addition to this, the wedge member 6 is also provided. The wedge member 6 will be described with reference to FIG.

  Fig.9 (a) is a figure which expands and shows G part which encloses the sand gathering pit 42 of the sedimentation basin 1 shown in FIG. 1 and its peripheral part with a circle, and FIG.9 (b) is the figure (a). H-H sectional view of the same, (c) of the figure is an I-I sectional view of (a) of the same figure. In FIG. 9A and FIG. 9B, the left side is the upstream side, and the right side is the downstream side. In FIG. 9C, the lateral direction is the width direction. FIG. 9 (d) is a perspective view of the wedge member 6 shown in FIG. 9 (a) as viewed from the upper left on the upstream side.

  As shown in FIGS. 9 (a) to 9 (c), the weir member 6 is a sand rising pump in a state in which a flow path connecting the trough 3 and the space forming member 8 to the sand raising pump 51 of the sand collecting pit 42 is secured. It surrounds 51. That is, the wedge member 6 corresponds to an example of a surrounding member. As a surrounding member, a portion other than the flow path leading from the trough 3 and the space forming member 8 to the sand raising pump 51 of the sand collecting pit 42 may be closed to surround the sand raising pump 51, but this embodiment The weir member 6 surrounds the lift sand pump 51 with a predetermined gap.

  As shown in FIG. 9A to FIG. 9D, the wedge member 6 has a ceiling 61 located on the upper surface, partition walls 62 and 62 provided on the upstream side and downstream of the ceiling 61, and lifting It has a first side wall 63 constituting a side wall on the side where the sand tube 52 is located, and a second side wall 64 constituting the other side wall. The weir member 6 of this embodiment surrounds the sand raising pump 51 and covers the sand raising pump 51 with a ceiling portion 61.

  The ceiling portion 61 has a substantially rectangular shape, and avoids the projecting portions 611 and 611 protruding to the upstream side and the downstream side, the through hole 61 a provided in the approximate center in plan view, and the sand rising pipe 52. And a substantially U-shaped notch 61b. The weir member 6 is attached to the sand raising pump 51 by a fastening member (not shown) in a state where the sand raising pump 51 passes through the through hole 61 a of the ceiling part 61. Thus, as described above, by pulling up the sand raising pump 51 from the sand collecting pit 42, the weir member 6 can also be pulled up from the sand collecting pit 42.

  The partition wall 62 is suspended in a substantially inverted triangle shape from the projecting portion 611 of the ceiling portion 61, and the lower end portion is cut away in an arc shape. Further, as shown in FIG. 9 (a) and FIG. 9 (b), the partition wall 62 is the upstream side of the second support plate 92 in the upstream pond bottom 10a and the second support plate in the downstream pond bottom 10b. They are respectively located downstream of 92. That is, the partition wall 62 is positioned upstream of the second support plate 92 in the transfer direction. Thus, as described above, the rock mass R (see FIG. 8A, etc.) that has moved toward the sand collection pit 42 along with the transfer of sand by the water discharged from the discharge port 7a is, first, the partition wall Stopped by 62. If there is a stone mass R that has passed through the partition wall 62, it is finally blocked by the second support plate 92. The partition wall 62 may be located downstream of the second support plate 92 in the transfer direction. However, in this embodiment, if a stone block or the like is caught between the partition wall 62 and the second support plate 92, the partition wall 62 moves due to vibration or the like when the sand raising pump 51 is driven, A stone block or the like sandwiched between the second support plate 92 may fall into the sand collecting pit 42. On the other hand, as shown in FIG. 9, if the partition wall 62 is positioned upstream of the second support plate 92 in the transfer direction, even if the partition wall 62 moves, the partition wall 62 and the second support Stone blocks and the like caught between the plate 92 and the like do not fall into the sand collecting pit 42.

  Further, since the lower end portion of the partition wall 62 is notched in an arc shape, as shown in FIG. 9C, the space between the partition wall 62 and the space forming member 8 forms a space with the trough 3 A gap of substantially the same size as the gap with the member 8 is provided.

  The first side wall portion 63 is a position sandwiched by a pair of rectangular wall portions 631, 631 spaced apart in the transfer direction and the rectangular wall portions 631, 631, and the cutout portion of the ceiling portion 61 It has a U-shaped wall portion 632 suspended from 61b. When the sand pump 51 is removed from the sand tube 52 and the wedge member 6 is taken out of the sand collecting pit 42 together with the sand pump 51, the U-shaped wall portion 632 contacts the sand tube 52 with the sand member 6. And the flow path leading to the suction port of the sand raising pump 51 from the first side wall 63 side is blocked to some extent. The second side wall 64 is a single rectangular wall. The first side wall portion 63 and the second side wall portion 64 are arranged with a gap to the bottom of the sand collecting pit 42. By setting this gap, it is possible to adjust the lower limit value of the size of the contaminant that prevents reaching the sand raising pump 51.

  The wedging member 6 makes it possible to prevent the contaminants that cause the sand pump 51 from reaching the sand pump 51. Although the ceiling portion 61 is not necessarily required, if it encloses the sand pump 51 and is covered by the ceiling portion 61 as in the present embodiment, not only contaminants flowing from the side but also sediment from above Can also block out any contaminants.

  Next, modifications of the above-described embodiment will be described. In the following description, differences from the above-described embodiment will be mainly described, and components having the same names as the components described so far will be described with the reference numerals used so far, Duplicate descriptions may be omitted.

  FIG. 10 is a view showing a modified example of the partition member. In FIG. 10, the left and right direction is the width direction.

  In the embodiment described above, as shown in FIGS. 3A and 8A, the partition portion 9121 which is a portion of the first support plate 91 and the partition portion 9221 which is a portion of the second support plate 92 have Although it has a function as a partition member, it may be configured as a partition member which does not have a function of supporting the space forming member 8. In FIG. 10, the modification which provided the partition member which does not have a function which supports the space formation member 8 is shown.

  The lower end portion 931 of the partition member 93 shown in FIG. 10A is provided in a substantially linear shape in the width direction and is connected to the upper end of the space forming member 8 and the upper edge of the groove defining surface 3a of the trough 3, ie, It is provided in a state of being connected to the upper end of the space forming member 8 and the upper edge 3 b of the trough 3. Thereby, the partitioning member 93 is provided in the upper area from the area connected to the upper end of the space forming member 8 and the upper edge 3 b of the trough 3. The height dimension of the partition member 93 is set to substantially the same length as the minimum distance C between the upper edge 3 b of the trough 3 and the space forming member 8, and the upper end portion 932 is provided substantially linearly in the width direction There is. When the height position of the space forming member 8 in the trough 3 is changed, the lower end portion of the partition member 93 is the upper end of the space forming member 8 as shown by a two-dot chain line in FIG. It may be inclined to be connected to the upper edge 3 b of the trough 3. According to the partition member 93, the stone mass R sandwiched between the space forming member 8 and the upper edge 3b of the trough 3 can be stably blocked.

  The lower end portion 941 and the upper end portion 942 of the partition member 94 shown in FIG. 10B are formed in an arc shape convex upward. The space forming member 8 is disposed at the same distance from any upper edge 3 b of the groove defining surface 3 a in the direction crossing the extending direction of the trough 3, and between the space forming member 8 and the lower end 941. Has a distance of substantially the same size as the minimum distance C between the upper edge 3 b of the trough 3 and the space forming member 8. Further, the height dimension of the partition member 94 is set to be substantially the same as the distance C. According to the partition member 94, even if a large stone block R flows, it can be stably stopped, and in particular, the sediment settling tank in a mode in which the dust remover 2 is provided on the downstream side and a large stone block or the like easily flows in Useful for

  The partition member 95 shown in FIG. 10C is used in a mode in which the space forming member 8 is not disposed at the center in the width direction in the trough 3 but at a position biased in the width direction. The space forming member 8 shown in FIG. 10C is disposed closer to the first upper edge 3b1 shown on the right side in the figure than the second upper edge 3b2 shown on the left side in the figure in the groove defining surface 3a. . Thus, the minimum distance C2 between the second upper edge 3b2 and the space forming member 8 is larger than the minimum distance C1 between the first upper edge 3b1 and the space forming member 8. The lower end 951 and the upper end 952 of the partition member 95 are formed in a convex arc shape upward, and the minimum distance between the space forming member 8 and the lower end 951 is the second upper edge 3 b 2 and the space forming member 8 And is set to be substantially the same as the minimum interval C2. Here, as shown in FIG. 10 (c), one of the upper edges of the space defining member 8 in the direction intersecting the extending direction of the trough 3 of the groove defining surface 3a (here, shown on the left side of the figure) In the aspect arranged closer to the other upper edge (here, the first upper edge 3b1 shown on the right side of the figure) than the second upper edge 3b2, the minimum of the first upper edge 3b1 and the space forming member 8 The minimum distance C2 between the second upper edge 3b2 and the space forming member 8 is larger than the distance C1. In this embodiment, even if a block R or the like smaller than the minimum distance between the second upper edge 3 b 2 and the space forming member 8 is blocked by the partition member 95, a stone having the same size as the blocked block R The lumps R and the like may intrude from the gap between the second upper edge 3b2 and the space forming member 8 and variations occur in the size of the stone blocks R and the like to be blocked. In the modification shown in FIG. 10C, the lower end 951 of the partition member 95 is provided above the upper end of the space forming member 8 by a distance C2 which is the minimum distance between the second upper edge 3b2 and the space forming member 8. By this, the lower limit value of the size of the rock mass R etc. to be blocked can be made constant.

  FIG. 11 is a view showing a modification of the space forming member 8 shown in FIG. 8 (b).

  The projecting portion 8c 'of the space forming member 8' shown in FIG. 11 is not provided with the suction port 8b at the lower end portion, and is formed in an annular shape as viewed in the transfer direction. By doing this, it is possible to further reduce the sand that falls from the suction port 8 b before reaching the sand collection pit 42.

  12 (a) and (b) are views showing a first modification of the wedge member 6 shown in FIG. 9 corresponding to FIG. 9 (c) and FIG. 9 (d).

  As shown in FIG. 12 (a) and FIG. 12 (b), in the wedge member 6 'of the first modification, the partition walls 62' and 62 'hanging down from the projecting portions 611 and 611 of the ceiling portion 61 are rectangular. The rectangular transfer direction side partition walls 621 and 621 hanging from the ceiling portion 61 are provided on both sides in the width direction across the partition walls 62 ′ and 62 ′. In the wedge member 6 ′ of the first modification, the transfer direction side partition wall 621 can block the contaminants flowing into the sand collecting pit 42.

  FIG. 13 is a view showing a second modification of the wedge member 6 shown in FIG. 9 and a modification of the second support plate 92 shown in FIG. 9 corresponding to FIG. 13 (b) is a cross-sectional view taken along the line J-J of FIG. 13 (a), and FIG. 13 (c) is a cross-sectional view taken along line K-K of FIG. 13 (a).

  As shown in FIGS. 13 (a) to 13 (d), the wedge member 6 '' of the second modification includes an upstream side wall 65 on the upstream side and a downstream side wall 66 on the downstream side. A rectangular opening 65 a is formed in the upstream side wall 65, and an opening 66 a is similarly formed in the downstream side wall 66.

  The second support plate 92 ′ of the modified example has a bent portion 923 located on the upper side of the space forming member 8 and bent toward the sand collecting pit 42. The bent portion 923 enters into the wedge member 6 "from the openings 65a and 66a of the wedge member 6". Thus, the upstream side of the sand collecting pit 42 is blocked by the upstream side wall 65 of the weir member 6 '' and the bent portion 923 of the second support plate 92 ', and the downstream side of the sand collecting pit 42 is a weir member It is blocked by the downstream side wall 66 of 6 ′ ′ and a bent portion 923 of the second support plate 92 ′. Although the bent portion 923 may be slightly inserted at its tip 923a into the wedge member 6 '', in the present modification, the tip 923a of the bent portion 923 is sufficiently contained in the wedge member 6 '' for safety. It is set to the length to get into. In addition, the tip end 923a of the bent portion is not inserted into the wedge member 6 ′ ′, and is configured to face the upstream sidewall portion 65 and the downstream sidewall portion 66 with a predetermined gap between them and outside the wedge member 6 ′ ′. It is also good. However, a stone block or the like fitted between the tip 923a of the bent portion and the upstream side wall portion 65 etc. collects sand pits 42 due to the displacement of the upstream side wall portion 65 etc. due to vibration when the sand pump 51 is driven. May fall into the Therefore, a mode in which the tip end 923a of the bent portion is inserted into the wedge member 6 '' is more preferable.

  FIG. 14 shows an aspect in which, in the wedge member 6 ′ ′ of the second modified example shown in FIG. 13 and the second support plate 92 ′ of the modified example, the wedge member 6 ′ ′ of the second modified example is the third modified example It is a figure which shows the mode corresponding to (a)-(c) of FIG. Fig. 14 (b) is a cross-sectional view taken along the line L-L of Fig. 14 (a), and Fig. 14 (c) is a cross-sectional view taken along the line M-M of Fig. 14 (a).

  As shown in FIGS. 14 (a) to 14 (c), in the wedge member 60 of the third modification, the notch 61b 'formed in the ceiling 61' is largely cut away so as to avoid the sand pump 51. The U-shaped wall portion 632 'is suspended from the notch 61b'. As shown in FIG. 14 (a) and FIG. 14 (b), the weir member 60 is separated from the sand pump 51, and as shown in FIG. 14 (a) to FIG. 14 (c), one end is collected. Four support pieces 67 fixed to the side wall 421 of the sand pit 42 are provided, and the other ends of the support pieces 67 are fixed to the ceiling portion 61 '. Thereby, as shown in FIG. 14 (b) and FIG. 14 (c), the weir member 60 is disposed with a gap from the bottom of the sand collecting pit 42. In the embodiment shown in FIG. 14, the sand pump 51 is independently pulled up from the sand collection pit 42.

  So far, the sedimentation basin 1 in which one trough 3 and one space forming member 8 are provided in each of the upstream pond bottom 10a and the downstream pond bottom 10b has been described as an example. Here, when the lengths of the upstream pond bottom 10a and the downstream pond bottom 10b in the transfer direction are long, the plurality of troughs 3 are connected in the transfer direction, and the plurality of space forming members 8 are also connected in the transfer direction. It is good also as a mode to do. Further, instead of providing a sand collecting pit 42 between the upstream pond bottom portion 10 a and the downstream pond bottom portion 10 b as shown in FIGS. 1 and 2, the sand collecting pit 42 is located at the downstream end of the sand settling basin 1. It is the same also when it provides in a part and length of the pond bottom part 10 is lengthened. In these cases, a plurality of discharge members 7 may be provided at intervals in the transfer direction.

  FIG. 15A is a cross-sectional view in the width direction in a mode in which the plurality of troughs 3 and the plurality of space forming members 8 are connected in the transfer direction, and the discharge members 7 are provided in plurality. It is NN sectional drawing of a figure (a). In the figure (a), the left-right direction is the width direction, and in the figure (b) the right direction is the transfer direction. That is, in FIG. 6B, the left side is the upstream side in the transfer direction, and the right side is the downstream side in the transfer direction.

  As shown in FIG. 15B, the trough 3 and the space forming member 8 provided on the upstream side in the transfer direction are supported by the third support plate 96 at their downstream end in the transfer direction. The end portions on the upstream side in the transfer direction of the trough 3 and the space forming member 8 are supported by the first support plate 91 shown in FIG. Further, as shown in FIG. 15 (b), the trough 3 and the space forming member 8 provided on the downstream side in the transfer direction are supported by the third support plate 96 at their upstream end portions in the transfer direction. . The end portions of the trough 3 and the space forming member 8 on the downstream side in the transfer direction are supported by a second support plate 92 shown in FIG. 8A.

  As shown in FIG. 15 (b), by overlapping the third support plates 96 with each other and fixing them with the fastening members 963, the two troughs 3 are connected in the transfer direction, and the two space forming members 8 are connected in the transfer direction. ing. Accordingly, the space S1 in the trough 3 and the space S2 in the space forming member 8 are also connected in the transfer direction. The discharge member 7 is inserted from an insertion port 8d formed at the upper end portion of the space forming member 8, and is supported in a posture in which water is discharged in a substantially horizontal direction from the discharge port 7a.

  As shown in FIG. 15 (a), the third support plate 96 is the same as the second support plate 92 shown in FIG. 8 (a), of the space S1 in the trough 3, the space S2 of the space forming member 8 A first opening 96a is formed in the region, and a second opening 96b is formed in a donut shape of about 1⁄2 in the lower portion. As a result, in the space S1 in the trough 3, the portion other than the first opening 96a and the second opening 96b is also partitioned by the third support plate 96 in the transfer direction.

  FIG. 16 is a view showing a modification of the discharge port having the shape and position changed with respect to the discharge port 7a shown in FIG. 3A and FIG. In FIG. 16, the lateral direction is the width direction, and only the space forming member 8 and the discharge port of the discharge member are shown.

  The discharge port 70a of the first modified example shown by a solid line in FIG. 16 is deformed in an arc shape so that both end portions in the width direction face downward. By doing this, the central portion in the width direction of the discharge port 70a is moved away from the suction port 8b of the space forming member 8, and the suction port 8b functions as a discharge port for discharging sand sucked into the space S2. Can be expected to reduce

  The discharge port 70a 'of the second modified example shown by a dashed dotted line in FIG. 16 changes the position in the height direction until it abuts on the inner peripheral surface 8e of the space forming member 8. Furthermore, the discharge port 70a ′ ′ of the third modification shown by a two-dot chain line in FIG. 16 has the opening length W in the width direction reduced to be slightly larger than the opening length L in the width direction of the suction port 8b. The position in the height direction is changed until it abuts on the inner peripheral surface 8 e of the space forming member 8. By doing this, the range in which the position in the height direction of the discharge port 70 a ′ ′ of the third modification is changed more than the discharge port 70 a ′ of the second modification can be expanded.

  As in these modifications, the discharge port has a flat shape in which the height direction expands in the collapsing width direction, and the opening length W in the width direction is greater than the opening length L in the width direction of the suction port 8b. Within the range of the requirement of being long, its shape and arrangement position can be changed.

  The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the claims. For example, slits may be formed in a part or all of the first support plate 91, the second support plate 92, the third support plate 96, the partition members 93, 94, 95, and further the wedge member 6, The aspect which suppresses that the flow of the water in the sedimentation basin 1 is inhibited by these 1st partition members 93 grade | etc., May be employ | adopted by comprising a rod-shaped member etc. which connected the rod material.

  In addition, even if it is the component required contained only in each description of embodiment and each modification which were demonstrated above, you may apply the component to embodiment and another modification.

  The following is a supplementary note including the matters described so far.

(Supplementary Note 1) The other solid-liquid separation system causes the contaminants contained in the received liquid to settle to the bottom, transfers the sedimented contaminants to the accumulation portion, and removes the contamination from the accumulation portion A solid-liquid separation system,
A groove extending toward the accumulation portion at the bottom and opening upward,
A space forming member provided along the groove, forming a closed space at the upper end, and provided with a suction port below the upper end and spaced from the bottom of the groove;
And a discharge port for discharging the fluid in the space toward the downstream side in the transfer direction of the contaminants,
The suction port is opened in the groove, and functions as an opening that sucks the contaminants accumulated in the groove into the space by discharging the fluid from the discharge port.
The space forming member functions as a path along which the contaminant sucked into the space moves toward the accumulation portion by discharging the fluid from the discharge port, and the end portion of the accumulation portion is, It is characterized in that the groove protrudes more than the end of the accumulation portion side.

(Supplementary Note 2) Also, another solid-liquid separation system causes the contaminants contained in the received liquid to settle to the bottom, transfers the sedimented contaminants to the accumulation portion, and removes the contamination from the accumulation portion A solid-liquid separation system for removing
A groove extending toward the accumulation portion at the bottom and opening upward,
A space forming member provided along the groove, forming a closed space at the upper end, and provided with a suction port below the upper end and spaced from the bottom of the groove;
And a discharge port for discharging the fluid in the space toward the downstream side in the transfer direction of the contaminants,
The space forming member has an end on the side of the stacking portion that protrudes more than an end on the side of the stacking portion in the groove,
The discharge port is characterized in that the fluid is discharged at a discharge pressure of 0.05 MPa or more and 0.3 MPa or less.

  That is, the space forming member protrudes in the transfer direction more than the groove.

  According to this solid-liquid separation system, since the space formation member has the end on the accumulation unit side protruding more than the end on the accumulation unit side in the groove, the accumulation of the space formation member is performed. Even if the contaminants drop at the end portion of the part side, the contaminants can easily reach the accumulation portion, and more contamination can be transferred to the accumulation portion.

  (Supplementary Note 3) In the solid-liquid separation system according to Supplementary Note 2, a support member is provided at an end of the groove on the accumulation portion side, the space forming member penetrates, and supports the space forming member. It may be one.

  If the end portion of the space forming member on the stacking portion side protrudes more than the end portion of the groove on the stacking portion side, the position of the space forming member with respect to the groove may be difficult to stabilize. . By supporting the space forming member by the support member, the position of the space forming member with respect to the groove can be stabilized.

  (Supplementary Note 4) Furthermore, in the solid-liquid separation system according to Supplementary Note 2, the space forming member is provided at an end of the groove on the accumulation portion side, and the space forming member penetrates in a direction crossing the extending direction of the groove. It may be provided with a partition member that partitions the bottom.

  It is possible to make it easy to reach the accumulation portion about the contaminants which enter through the gap and are accumulated in the bottom of the groove while blocking large contaminants which do not enter the gap by the partition member.

DESCRIPTION OF SYMBOLS 1 sedimentation basin 2 dust remover 3 trough 3a groove demarcation surface 41 inclined surface 42 sand collecting pit 51 raising sand pump 6 6 member 7 discharge member 7a discharge port 8 space formation member 8b suction port 91 1st support plate 92 2nd support plate 93 , 94, 95 Partition members S1, S2 space

Claims (1)

What is claimed is: 1. A solid-liquid separation system for settling to a bottom portion contaminants contained in a received liquid, transferring the sedimented contaminants to an accumulation portion, and removing the contamination from the accumulation portion,
A groove extending toward the accumulation portion at the bottom and opening upward,
A space forming member provided along the groove, forming a closed space at the upper end, and provided with a suction port below the upper end and spaced from the bottom of the groove;
And a discharge port for discharging the fluid in the space toward the downstream side in the transfer direction of the contaminants,
The discharge port discharges the fluid at a discharge pressure of 0.05 MPa or more and 0.3 MPa or less, and the opening length in the width direction is longer than the opening length in the width direction of the suction port. Solid-liquid separation system.