JP2024009432A - Ramp and ramp sedimentation device - Google Patents

Abstract

To provide a ramp capable of improving strength and enabling a suspended mater to appropriately slide down.SOLUTION: A ramp 10 comprises: a ramp body 50 formed into an arch shape in a horizontal direction; a peripheral edge 52 including upper and lower sides 10a and 10b and both lateral sides 10c and 10d formed to surround the ramp body; and a first arch plate 54 formed to close an arch opening of the upper end of the ramp body. The upper side of the ramp is formed on the same plane as that of both the lateral sides. The first arch plate is formed to incline closer to the center side of the ramp body than a surface orthogonal to the plane.SELECTED DRAWING: Figure 6

Description

The present invention relates to a tilted plate and a tilted plate sedimentation device, and more particularly to a tilted plate and a tilted plate sedimentation device including the same, which are used for increasing the removal efficiency of suspended solids in water.

An example of a conventional inclined plate is disclosed in Patent Document 1. The inclined plate of Patent Document 1 has an inclined plate main body formed in a flat plate shape, and a plurality of ribs such as a convex portion and an inclined portion are formed on the inclined plate main body.

Further, another example of the conventional inclined plate is disclosed in Patent Document 2. The inclined plate of Patent Document 2 has an inclined plate main body formed in an arch shape in the lateral direction.

Utility Model Publication No. 5-13502 Design registration No. 1587090

In the technique of Patent Document 1, a plurality of ribs are provided on the inclined plate in order to increase the strength of the inclined plate. However, if the number of ribs formed on the inclined plate is large, suspended substances tend to accumulate on the inclined plate, and the ribs become resistant to water flow.

On the other hand, according to the technique disclosed in Patent Document 2, by forming the inclined plate main body in an arch shape, it is possible to promote the sliding down of suspended solids such as sludge. In addition, since the strength against loads from above is higher than when the inclined plate body is formed into a flat plate shape, suspended solids can accumulate on the inclined plate while reducing the number of reinforcing ribs formed on the inclined plate. Deflection caused by this can be prevented.

However, in the technique of Patent Document 2, since the inclined plate main body is simply formed in an arch shape, there is a risk of insufficient strength. Furthermore, if the inclined plate main body is formed in an arch shape as in the technique of Patent Document 2, as shown in FIG. 11, when the inclined plates A are installed in multiple stages, the upper surface of the upper inclined plate A and the lower inclined plate A The distance a1 between the top surface and the top surface becomes narrow. For this reason, there is a possibility that the suspended solids may be prevented from sliding down from the upper inclined plate A to the lower inclined plate A. In order to prevent this, it is necessary to increase the distance a2 between adjacent inclined plates A, which reduces the number of inclined plates A that can be installed.

Therefore, a primary object of the present invention is to provide a novel ramp and ramp settling device.

Another object of the present invention is to provide an inclined plate and an inclined plate sedimentation device equipped with the same, which can improve strength and allow suspended matter to slide down appropriately.

The first invention is a tilted plate used in a tilted plate settling device, which includes a tilted plate main body formed in an arch shape in the lateral direction, and an upper side, a lower side, and both sides formed to surround the inclined plate main body. and a first arch plate-shaped part formed to close the arcuate opening at the upper end of the inclined plate main body, the upper side is formed on the same plane as both sides, and the first arch plate-shaped part is provided with: This is an inclined plate that is formed so as to be inclined toward the center of the inclined plate main body than a plane orthogonal to the same plane.

In the first invention, the inclined plate is used in an inclined plate sedimentation device installed in a sedimentation tank such as a water purification plant. This slanted plate has a slanted plate main body formed in a laterally arched shape, that is, a curved plate shape with a lateral center convex upward, and an upper side, a lower side, and both sides formed to surround the slanted plate main body. and a peripheral portion including the sides. Further, the inclined plate has a first bow plate-shaped portion formed so as to close the arcuate opening at the upper end of the inclined plate main body. The upper side is formed on the same plane as both side sides, and the first bow plate-shaped part is formed so as to be inclined toward the center of the inclined plate main body rather than a plane perpendicular to the same plane.

According to the first invention, since the inclined plate main body is formed in an arch shape and has the first bow plate-shaped portion, the strength of the inclined plate can be improved. In addition, the upper side of the inclined plate is formed on the same plane as both sides, and the first bow plate-shaped part is formed to be inclined toward the center of the inclined plate main body, so that when multiple inclined plates are installed, , it is possible to ensure an appropriate distance between the upper surface of the upper inclined plate and the upper surface of the lower inclined plate. Therefore, the suspended matter that has settled on the inclined plate can be appropriately slid down.

A second invention is dependent on the first invention, and includes a second bow plate-shaped part formed to close an arcuate opening at the lower end of the inclined plate main body, and the lower side is formed on the same plane as both sides. , the second bow plate-shaped portion is formed to be inclined toward the center of the inclined plate main body with respect to a plane orthogonal to the same plane.

According to the second invention, the strength of the inclined plate can be improved more appropriately, and the suspended matter that has settled on the inclined plate can be more appropriately slid down.

A third invention is dependent on the first or second invention, and includes a groove-shaped groove formed in a support frame for supporting the inclined plate, which is formed to protrude laterally from both ends of the inclined plate main body. It has a sleeve plate that is slidably fitted into the guide member.

According to the third invention, since the sleeve plate portions formed on both sides of the inclined plate are supported by the guide members, deformation in which the arch-shaped inclined plate main body expands laterally (the arch collapses) is more reliably prevented. can. Therefore, the suspended matter that has settled on the inclined plate can be more appropriately slid down, and the inclined plate can be appropriately prevented from falling off from the guide member.

A fourth invention is dependent on the first or second invention, and includes first ribs formed on both sides of the inclined plate main body and extending along each of both sides.

According to the fourth invention, the strength of the inclined plate against vertical deflection can be improved, and deformation of the inclined plate can be more appropriately prevented.

A fifth invention is dependent on the first or second invention, and includes a second rib formed on the upper side of the inclined plate main body and extending along the upper side.

According to the fifth invention, the strength of the upper part of the inclined plate against vertical deflection can be improved, and deformation of the upper part of the inclined plate can be more appropriately prevented.

A sixth invention is dependent on the first or second invention, and the height of the arch of the inclined plate main body is set to a size of 50 mm or less.

A seventh invention is dependent on the second invention, and the curvature of the arcuate end of the first bow plate-shaped portion is larger than the curvature of the arcuate end of the second bow plate-shaped portion.

An eighth invention is dependent on the third invention, and includes a third rib formed on the sleeve plate portion and locked by a locking portion formed on the guide member.

According to the eighth invention, even if a force is applied to the sleeve plate in the direction of detachment from the guide member due to the influence of water flow or the like, the sleeve plate is prevented from coming off from the guide member. It is possible to properly prevent the board from falling.

A ninth aspect of the present invention is a tilted plate settling device including a plurality of tilted plates, including a tilted plate main body formed in an arch shape in the lateral direction, and a sleeve plate portion that projects laterally from both ends of the tilted plate main body. This is a tilted plate settling device including a tilted plate having a tilted plate, a support frame for supporting the tilted plate, and a groove-shaped guide member provided on the support frame and into which a sleeve plate portion is slidably fitted.

In a ninth invention, the inclined plate settling device includes a plurality of inclined plate bodies, a support frame that is a main frame for supporting the inclined plates, and a guide member provided on the support frame. The slanted plate includes a slanted plate main body formed in a laterally arched shape, that is, a curved plate shape whose lateral center portion is convex upward, and sleeve plate portions that protrude laterally from both ends of the slanted plate main body. have Further, the guide member is formed in a groove shape into which the sleeve plate portion of the inclined plate is slidably inserted.

According to the ninth invention, since the inclined plate main body is formed in an arch shape, the strength of the inclined plate can be improved. Further, since the sleeve plate portions formed on both sides of the inclined plate are supported by the guide members, it is possible to more reliably prevent deformation of the arch-shaped inclined plate main body from expanding in the lateral direction (arch collapse). Therefore, the suspended matter that has settled on the inclined plate can be appropriately slid down, and the inclined plate can be appropriately prevented from falling off from the guide member.

According to this invention, the strength of the inclined plate can be improved, and suspended matter that has settled on the inclined plate can be appropriately slid down.

The above objects, other objects, features and advantages of the present invention will become more apparent from the detailed description of the embodiments given below with reference to the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram schematically showing an example of a settling tank in which a tilted plate sedimentation device including a tilted plate according to an embodiment of the present invention is installed. It is a perspective view showing a part of inclined plate sedimentation device. It is a longitudinal cross-sectional view showing a part of an inclined plate sedimentation device. It is a cross-sectional view showing a guide member and an inclined plate with which an inclined plate settling device is provided. FIG. 3 is an enlarged view showing the peripheral portion of the lower end of the guide member of the inclined plate settling device. It is a perspective view showing an inclined plate. It is a front view showing an inclined plate. 8 is a vertical sectional view showing a cross section of the inclined plate taken along line VIII-VIII in FIG. 7. FIG. 8 is a cross-sectional view showing a cross section of the inclined plate taken along line IX-IX in FIG. 7. FIG. It is a perspective view which shows a part of inclined plate sedimentation device which is another Example of this invention. It is a figure for explaining the problem with the inclined plate provided with the conventional arch-shaped inclined plate main body.

Referring to FIGS. 1 and 2, an inclined plate 10 according to an embodiment of the present invention is applied to an inclined plate sedimentation device 14 installed in a sedimentation tank 12 of a water purification plant, etc., and is used in raw water (water to be treated). It is used to promote the sedimentation of suspended solids such as sludge in order to increase their removal efficiency.

First, prior to a specific explanation of the inclined plate 10, an example of the settling basin 12 and the inclined plate settling device 14 used in this embodiment will be briefly explained. However, the configurations of the sedimentation basin 12 and the inclined plate sedimentation device 14 described below are merely examples, and are not limited thereto.

As shown in FIG. 1, the sedimentation basin 12 has an inlet 12a formed on one side wall and an outlet 12b formed on the other side wall opposite to the one side wall. An inclined plate sedimentation device 14 including a plurality of inclined plates 10 is installed in the sedimentation basin 12 . The inclined plate sedimentation device 14 is installed using leg members 16 or hanging members so that a predetermined space is secured between it and the bottom surface of the sedimentation tank 12. In such a sedimentation tank 12, the raw water that has flowed into the sedimentation tank 12 from the inlet 12a enters the channel formed between the slope plates 10 from one side of the slope plate sedimentation device 14 and flows to the other side. It slips away. At this time, suspended substances contained in the raw water are separated from the raw water by settling on the inclined plate 10 and sliding down. The raw water from which suspended matter has been removed is discharged from the outlet 12b as treated water.

In addition, in FIG. 1, although the inclined plate settling device 14 is of a horizontal flow type, the inclined plate 10 is also applicable to an upward flow type inclined plate settling device. In the upward flow type inclined plate sedimentation device, raw water enters the flow path formed between the inclined plates 10 from the lower surface side and escapes to the upper surface side.

As shown in FIGS. 2 to 4, the inclined plate settling device 14 includes a plurality of inclined plates 10, a support frame 20 which is a main frame for supporting the inclined plates 10, and a guide member provided on the support frame 20. 22.

The inclined plates 10 are formed into a rectangular plate shape as a whole, and are arranged in parallel at a predetermined interval D1 in the thickness direction while being inclined at a predetermined inclination angle θ with respect to the horizontal direction (that is, standing diagonally). Ru. A flow path for raw water is formed between these inclined plates 10 arranged in the thickness direction, and in the horizontal flow type inclined plate sedimentation device 14 of this embodiment, the raw water flows along the width direction of the inclined plates 10. The inclination angle θ is not particularly limited as long as it is an angle that allows suspended matter to slide down the incline plate 10, but it is preferably set to, for example, 30 degrees to 70 degrees. Further, the interval D1 is not particularly limited, but is preferably set to, for example, 60 mm or more and 120 mm or less. In this example, the inclination angle θ is 60 degrees and the distance D1 is 100 mm.

Further, in this embodiment, the inclined plates 10 are arranged in a plurality of stages in the vertical direction, and in a plurality of rows in the lateral direction (width direction of the inclined plates 10). At this time, the vertically arranged inclined plates 10 are provided to be inclined in opposite directions (staggered) with respect to the vertical direction.

However, in FIGS. 2 and 3, in order to simplify the drawings, four inclined plates 10 are shown lined up in the thickness direction, and other inclined plates 10 lined up in the thickness direction are omitted. The number of inclined plates 10 to be arranged can be changed as appropriate. Further, the number of stages of inclined plates 10 arranged in the vertical direction and the number of rows of inclined plates 10 arranged in the horizontal direction can also be changed as appropriate. The specific configuration of the inclined plate 10 will be described later.

The support frame 20 includes a plurality of vertical frames 24 extending in the vertical direction and a plurality of horizontal frames 26 extending in the horizontal direction, and is constructed by appropriately combining pipe materials, round bars, long plate materials, or the like.

The guide members 22 are a pair of groove-shaped members into which both sides of the inclined plate 10 (sleeve plate parts 58 described later) are slidably fitted, and guide the inclined plate 10 to the mounting position and guide the supporting frame 20. It is used to connect and fix the inclined plate 10 at a predetermined inclination angle θ. Specifically, the guide member 22 has an upper piece 22a, a side piece 22b, and a lower piece 22c, and is formed in a groove shape that opens toward the inside (towards the inclined plate 10 to be held). Furthermore, a locking portion 22d that protrudes downward is formed on the inner surface of the guide member 22 (specifically, the tip of the upper piece 22a). The length of the guide member 22 is set to be approximately the same as the length of the inclined plate 10 in the vertical direction (that is, the length of the side sides 10c and 10d, which will be described later). That is, the guide member 22 supports both sides of the inclined plate 10 over its entire length.

Such a guide member 22 is fixed to the horizontal frame 26 using a first fixing pin 28 (see FIG. 5) or the like so as to bridge the horizontal frames 26 arranged vertically in a diagonal direction. When attaching the inclined plate 10 to the support frame 20 and the guide member 22, hold the lower end of the inclined plate 10, and insert the inclined plate 10 from the bottom (however, from the top) between the pair of guide members 22. and push it upward. At this time, by fitting both sides of the inclined plate 10 into the grooves of the guide member 22 and sliding it, the inclined plate 10 is properly guided to its mounting position. When the inclined plate 10 reaches the attachment position, the inclined plate 10 is fixed to the guide member 22 using the second fixing pin 30 (see FIG. 5) or the like.

Next, the configuration of the inclined plate 10 will be specifically explained with reference to FIGS. 6 to 9. As shown in FIGS. 6 to 9, the inclined plate 10 includes an arch-shaped inclined plate main body 50, a first bow plate-shaped portion 54, a second bow plate-shaped portion 56, and the like. The inclined plate 10 is manufactured, for example, by vacuum forming a rectangular flat plate. Various synthetic resins, metals, and the like can be used as the material for the inclined plate 10, and although not particularly limited, it is preferable to use hard vinyl chloride.

The inclined plate 10 is formed into a rectangular plate shape as a whole as described above. The upper side 10a and the lower side 10b of the inclined plate 10 extend linearly parallel to each other, and the first side 10c and the second side 10d of the inclined plate 10 (hereinafter collectively referred to as "both sides 10c, 10d"). ) extend linearly parallel to each other in a direction perpendicular to the upper side 10a and the lower side 10b. Moreover, the upper side 10a and the lower side 10b of the inclined plate 10 are formed on the same plane as both side sides 10c and 10d.

The inclined plate main body 50 is a main part that occupies most of the inclined plate 10, and is formed into an arch shape extending in the lateral direction (width direction), that is, a curved plate shape whose lateral center portion is convex upward. . The upper surface of this inclined plate main body 50 (the surface on which the suspended matter slides down) is a smooth curved surface with no irregularities (that is, no ribs or the like are formed). The peripheral edge 52 of the inclined plate 10 including the above-mentioned upper side 10a, lower side 10b, and both sides 10c, 10d is formed so as to surround the inclined plate main body 50.

Further, a first bow plate-like portion 54 having an arcuate flat plate shape is formed at the upper end of the inclined plate main body 50 so as to close an arcuate opening formed on the lower surface side of the inclined plate main body 50 by making it into an arch shape. . The first bow plate-shaped portion 54 is formed so as to be inclined toward the center of the inclined plate main body 50 with respect to a plane F that is orthogonal to the same plane on which the upper side 10a, the lower side 10b, and both sides 10c and 10d are formed. That is, the first bow plate-shaped portion 54 is not formed in the direction of the plane F, but is formed to be inclined downward with respect to the direction of the plane F so as to enter the inclined plate main body 50 side.

On the other hand, at the lower end of the inclined plate main body 50, a second arcuate plate-shaped portion 56 having an arcuate flat plate shape is formed so as to close an arcuate opening formed at the lower end. This second bow plate-shaped portion 56 is also formed so as to be inclined toward the center of the inclined plate main body 50 with respect to a plane F that is orthogonal to the same plane on which the upper side 10a, the lower side 10b, and both side sides 10c and 10d are formed. That is, the second bow plate-shaped portion 56 is not formed in the direction of the plane F, but is formed to be inclined upward with respect to the direction of the plane F so as to enter the inclined plate main body 50 side.

The curvature of the arc end 54a of the first bow plate-shaped portion 54 is set to be larger than the curvature of the arc end 56a of the second bow plate-shaped portion 56. That is, the inclination angle θ1 of the first bow plate-shaped portion 54 with respect to the plane F direction is set to be larger than the inclination angle θ2 of the second bow plate-shaped portion 56 with respect to the plane F direction. Further, the inclination angle θ1 of the first bow plate-shaped portion 54 is set so that the upper surface of the first bow plate-shaped portion 54 can maintain a predetermined downward slope when the inclined plate 10 is installed at a predetermined inclination angle θ. be done. In this embodiment, the inclination angle θ1 of the first bow plate-shaped portion 54 is 78 degrees, and the inclination angle θ2 of the second bow plate-shaped portion 56 is 60 degrees.

The inclined plate 10 also includes sleeve plate portions 58 in the form of rectangular plates that are formed to protrude laterally (outward) from both ends of the inclined plate main body 50 and are long in the vertical direction (vertical direction). The outer portions of these sleeve plate portions 58 become portions that are slidably fitted into the guide member 22. Further, on the inner side of each sleeve plate portion 58, that is, on both sides of the inclined plate main body 50, ribs 60 are formed in a substantially trapezoidal shape convex upward and extend along both sides 10c and 10d of the inclined plate 10. (first rib) is formed. Further, on the outer side of each sleeve plate portion 58, that is, the portion fitted into the guide member 22, a small rib 62 (a third rib ) is formed. This small rib 62 is locked by the locking portion 22d of the guide member 22 when the sleeve plate portion 58 is fitted into the groove of the guide member 22 (see FIG. 4).

By having these ribs 60 and 62, the strength of the inclined plate 10 against vertical bending can be improved, so that deformation of the inclined plate 10 can be appropriately prevented. Further, the suspended matter (sediment) that settles on the upper surface of the arch-shaped inclined plate main body 50 will slide down while separating into left and right sides, but it is preferable to have ribs 60 on both sides of the inclined plate main body 50. The suspended solids separated into left and right sides on the upper surface of the inclined plate main body 50 are dammed up by the ribs 60 and slide down in the groove between the side part of the inclined plate main body 50 and the ribs 60 in a lump. This allows suspended substances to slide down more appropriately. Furthermore, even if a force is applied to the sleeve plate portion 58 in the direction of removal from the guide member 22 (in other words, inward) due to the influence of water flow, the small rib 62 is locked by the locking portion 22d of the guide member 22. By doing so, the sleeve plate portion 58 is prevented from coming off from the guide member 22, and the inclined plate 10 is prevented from falling.

Furthermore, fixing holes 64 into which the second fixing pins 30 described above are inserted are formed at both ends of the sleeve plate portion 58 . By inserting the second fixing pin 30 into the fixing hole 64, the inclined plate 10 is fixed to the guide member 22 in a state where the inclined plate 10 is prevented from slipping down.

Further, the inclined plate 10 has a laterally long rectangular plate-shaped extension portion that is formed to protrude upward (outward) from the upper ends of the inclined plate main body 50 and the first bow plate-shaped portion 54. There is. A rib 66 (second rib) is formed on this extending portion, and is formed in a substantially triangular shape convex upward and extends along the upper side 10a of the inclined plate 10. By having this rib 66, the strength of the upper end portion of the inclined plate 10 against lateral deflection can be improved, so that deformation of the upper part of the inclined plate 10 can be more reliably prevented.

In particular, the above-mentioned ribs 60, 62, and 66 exhibit their effects when attaching the inclined plate 10 to the guide member 22. When holding the lower end of the inclined plate 10 and pushing it up from below, the inclined plate 10 is prevented from being bent downward (sagging), and the upper end of the inclined plate 10 is prevented from being bent in the lateral direction. This is because it becomes easier to insert the inclined plate 10 between the pair of guide members 22.

Further, the size of the inclined plate 10 and each part of the inclined plate 10 is not particularly limited, but considering ease of installation of the inclined plate 10, the length of each side of the inclined plate 10 is, for example, 600 mm to 600 mm. It is desirable to set the size to 1500 mm. In this embodiment, the length L1 in the vertical direction of the inclined plate 10 (that is, the length of both sides 10c and 10d) is 1200 mm, and the length W1 in the lateral direction of the inclined plate 10 (that is, the length of the upper side 10a and the lower side 10b) is 1200 mm. The length) is 1000 mm. Further, in this embodiment, the vertical length L2 of the inclined plate main body 50 is 1120 mm, and the lateral length W2 of the inclined plate main body 50 is 840 mm.

Furthermore, the height T of the arch of the inclined plate main body 50 is preferably set to, for example, 10 mm or more and 50 mm or less, and more preferably set to, for example, 20 mm or more and 50 mm or less. If the height T of the arch of the inclined plate main body 50 is greater than 50 mm, installation and replacement work of the inclined plates 10 will be hindered when the inclined plates 10 are arranged in parallel at the minimum interval d1 (for example, 60 mm) in the thickness direction. This is because there is a risk of causing Furthermore, if the height T of the arch of the inclined plate main body 50 is smaller than 20 mm, the effect of improving the strength (that is, making it difficult to deform) by making the inclined plate main body 50 into an arch shape becomes small, and the arch of the inclined plate main body 50 becomes smaller. This is because if the height T is smaller than 10 mm, the effect of improving strength will be significantly reduced. In this embodiment, the arch height T of the inclined plate main body 50 is 50 mm.

In such an inclined plate 10, since the inclined plate main body 50 is formed in an arch shape, the strength against loads from above is increased compared to when the inclined plate main body 50 is formed in a flat plate shape. Therefore, while reducing the number of reinforcing ribs formed on the inclined plate 10, it is possible to prevent the inclined plate 10 from being bent (deformed) due to the accumulation of suspended matter on the inclined plate 10. In particular, in this embodiment, both sides of the inclined plate 10 (sleeve plate parts 58) are supported by the guide members 22 over the entire length in the longitudinal direction, so this is compared to simply fixing the four corners of the inclined plate 10. This allows it to appropriately support the reaction force that occurs when a load is applied from above. Thereby, it is possible to more reliably prevent deformation of the arch-shaped inclined plate main body 50 from expanding laterally (the arch is crushed), and it is possible to appropriately prevent the inclined plate 10 from falling off from the guide member 22.

In particular, in this embodiment, since the first bow plate-shaped portion 54 is formed to close the arcuate opening at the upper end of the inclined plate main body 50, the load from above on the inclined plate main body 50 is transferred to the tangent of the arcuate end 54a. The strength of the upper part of the inclined plate 10 can be improved. As a result, deformation of the upper part of the inclined plate 10 can be appropriately prevented, and the suspended solids can be prevented from being deposited on the inclined plate 10 due to deterioration of the sliding performance of the suspended substances due to the deformation of the inclined plate 10. Further, the upper side 10a of the inclined plate 10 is formed on the same plane as the both side sides 10c, 10d, and the first bow plate-shaped portion is formed so as to be inclined toward the center of the inclined plate main body 50 than the plane F perpendicular to the same plane. 54, when multiple stages of inclined plates 10 are installed, the distance D2 between the upper surface of the upper inclined plate 10 and the upper surface of the lower inclined plate 10 can be appropriately secured (Fig. 3 reference). Therefore, suspended matter can be appropriately slid down. Furthermore, by providing the first bow plate-shaped portion 54, the arch-shaped inclined plate main body 50 does not protrude from the upper fixing position of the inclined plate 10, so that the work of fixing the inclined plate 10 is facilitated.

Furthermore, in this embodiment, since the second arcuate plate-shaped portion 56 is formed to close the arcuate opening at the lower end of the inclined plate main body 50, the load from above on the inclined plate main body 50 is transferred in the tangential direction of the arcuate end 56a. The strength of the lower part of the inclined plate 10 can be improved. Thereby, deformation of the lower part of the inclined plate 10 can be appropriately prevented, and it is possible to more appropriately prevent suspended substances from being deposited on the inclined plate 10 due to deterioration of the sliding performance of suspended substances due to deformation of the inclined plate 10. . Further, the lower side 10b of the inclined plate 10 is formed on the same plane as the both side sides 10c, 10d, and the second bow plate-shaped portion is formed so as to be inclined toward the center of the inclined plate main body 50 than the plane F perpendicular to the same plane. 56, when multiple stages of inclined plates 10 are installed, the distance D2 between the upper surface of the upper inclined plate 10 and the upper surface of the lower inclined plate 10 can be more appropriately secured (Fig. (See 3). Therefore, suspended matter can be slid down more appropriately. Further, by providing the second bow plate-shaped portion 56, the arch-shaped inclined plate main body 50 does not protrude from the lower fixing position of the inclined plate 10, so that the work of fixing the inclined plate 10 is facilitated.

Furthermore, in this embodiment, no ribs are formed on the inclined plate main body 50, which is the main part of the inclined plate 10 (the part where suspended matter in water mainly settles), and the upper surface of the inclined plate main body 50 is made smooth without unevenness. Since it has a curved surface, resistance to water flow can be reduced and flow characteristics can be improved. Furthermore, since the amount of sediment that accumulates on the inclined plate 10 can be reduced, it is possible to prevent performance degradation due to deflection of the inclined plate 10, and to reduce maintenance costs such as cleaning.

As described above, according to this embodiment, since the inclined plate main body 50 is formed in an arch shape and has the first bow plate-shaped portion 54, the inclined plate main body 50 is not provided with reinforcing ribs or the like. The strength of the plate 10 can be appropriately improved. Further, since the upper side 10a of the inclined plate 10 is formed on the same plane as the both side sides 10c and 10d, and the first bow plate-shaped portion 54 is formed to be inclined toward the center of the inclined plate main body 50, the inclined plate 10 are installed in multiple stages, the distance D2 between the upper surface of the upper inclined plate 10 and the upper surface of the lower inclined plate 10 can be appropriately secured. Therefore, the suspended matter that has settled on the inclined plate 10 can be appropriately slid down.

Further, according to this embodiment, since the second bow plate-shaped portion 56 is provided, the strength of the inclined plate 10 can be improved more appropriately, and the suspended solids that have settled on the inclined plate main body 50 can be more appropriately slid down. I can do it.

Further, according to this embodiment, since both sides of the inclined plate 10 are supported by the guide members 22, it is possible to more reliably prevent deformation of the arch-shaped inclined plate main body 50 from expanding laterally (the arch is crushed), and Falling off of the inclined plate 10 from the member 22 can be appropriately prevented.

In the embodiment described above, the inclined plates 10 are arranged in two stages in the vertical direction, but as described above, the number of stages of the inclined plates 10 is not particularly limited, and as in the embodiment shown in FIG. The plates 10 may be arranged in only one stage. Even when the inclined plate 10 is arranged in one stage, the strength of the inclined plate 10 can be appropriately improved by forming the inclined plate main body 50 in an arch shape and having the first arched plate-shaped portion 54. Deformation of the plate 10 can be prevented, and the suspended matter that has settled on the inclined plate 10 can be appropriately slid down. Further, since the suspended solids that have settled on the upper surface of the inclined plate main body 50 are more likely to collect on the left and right sides (on both sides in the width direction), the secondary aggregation effect is increased and the suspended solids can be slid down more appropriately.

Note that the specific numerical values such as the dimensions and the specific shape listed above are merely examples, and can be changed as appropriate depending on the needs of the product specifications and the like.

DESCRIPTION OF SYMBOLS 10... Inclined plate 12... Sedimentation basin 14... Inclined plate sedimentation device 20... Support frame 22... Guide member 50... Inclined plate main body 52... Peripheral part 54... First bow plate-shaped part 56... Second bow plate-shaped part 58... Sleeve Plate portion 60...Rib (first rib)
62...Small rib (3rd rib)
66...Rib (second rib)

Claims (9)

An inclined plate used in an inclined plate sedimentation device,
A slanted plate body formed in an arch shape in the lateral direction,
a peripheral edge including an upper side, a lower side, and both sides formed to surround the inclined plate main body; and a first bow plate-shaped part formed to close an arcuate opening at the upper end of the inclined plate main body,
The upper side is formed on the same plane as the both side sides,
The first bow plate-shaped portion is an inclined plate formed so as to be inclined toward the center of the inclined plate main body with respect to a plane orthogonal to the same plane. a second arcuate plate-shaped portion formed to close the arcuate opening at the lower end of the inclined plate main body;
The lower side is formed on the same plane as the both sides,
The inclined plate according to claim 1, wherein the second bow plate-shaped portion is formed to be inclined toward the center of the inclined plate main body with respect to a plane orthogonal to the same plane. a sleeve plate portion that is formed to protrude laterally from both ends of the inclined plate main body and is slidably fitted into a groove-shaped guide member provided on a support frame for supporting the inclined plate; The inclined plate according to claim 1 or 2, having: The inclined plate according to claim 1 or 2, further comprising first ribs formed on both sides of the inclined plate main body and extending along each of the both sides. The inclined plate according to claim 1 or 2, further comprising a second rib formed on the upper side of the inclined plate main body and extending along the upper side. The inclined plate according to claim 1 or 2, wherein the height of the arch of the inclined plate main body is set to a size of 50 mm or less. The inclined plate according to claim 2, wherein the curvature of the arcuate end of the first bow plate-shaped portion is greater than the curvature of the arcuate end of the second bow plate-shaped portion. The inclined plate according to claim 3, further comprising a third rib formed on the sleeve plate portion and locked by a locking portion formed on the guide member. A tilted plate sedimentation device comprising a plurality of tilted plates,
The inclined plate has an inclined plate main body formed in an arch shape in the lateral direction, and sleeve plate parts projecting laterally from both ends of the inclined plate main body,
An inclined plate settling device comprising: a support frame for supporting the inclined plate; and a groove-shaped guide member provided on the support frame and into which the sleeve plate portion is slidably inserted.

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