Inclined plate and inclined plate sinking device

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

Technical Field

[0001] This invention relates to inclined plates and inclined plate sedimentation devices, and more particularly, to inclined plates and inclined plate sedimentation devices used for enhancing the removal efficiency of suspended substances in water, for example.

Background Art

[0002] An example of a conventional inclined plate is disclosed in Patent Document 1. The inclined plate of Patent Document 1 has an inclined plate body formed in a flat plate shape, and a plurality of ribs such as convex portions and inclined portions are formed on the inclined plate body.

[0003] Another example of a conventional inclined plate is disclosed in Patent Document 2. The inclined plate of Patent Document 2 has an inclined plate body formed in an arch shape in the lateral direction.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the technology of Patent Document 1, in order to increase the strength of the inclined plate, a plurality of ribs are provided on the inclined plate. However, if the number of ribs formed on the inclined plate is large, suspended substances are likely to accumulate on the inclined plate, and the ribs become resistant to the water flow.

[0006] On the other hand, according to the technology of Patent Document 2, by forming the inclined plate body in an arch shape, the sliding of suspended substances such as sludge can be promoted. Also, since the strength against the load from above is increased compared to forming the inclined plate body in a flat plate shape, it is possible to prevent deflection caused by the accumulation of suspended substances on the inclined plate while reducing the number of reinforcing ribs formed on the inclined plate.

[0007] However, in the technology described in Patent Document 2, the inclined plate body is only formed in an arch shape, which may result in insufficient strength. Furthermore, if the inclined plate body is formed in an arch shape as in the technology described in Patent Document 2, as shown in Figure 11, when inclined plates A are installed in multiple stages, the gap a1 between the upper surface of the upper inclined plate A and the upper surface of the lower inclined plate A becomes narrow. This may hinder the sliding of suspended matter from the upper inclined plate A to the lower inclined plate A. To prevent this, the gap a2 between adjacent inclined plates A must be made larger, which reduces the number of inclined plates A that can be installed.

[0008] Therefore, the main objective of this invention is to provide a novel inclined plate and an inclined plate sinking device.

[0009] Another object of this invention is to provide an inclined plate and an inclined plate sinking device equipped therewith, which can improve strength and allow suspended material to slide off properly. [Means for solving the problem]

[0010] The first invention is an inclined plate used in an inclined plate sinking device, comprising an inclined plate body formed in an arch shape in the lateral direction, a peripheral portion including an upper edge, a lower edge, and both sides formed to surround the inclined plate body, and a first bow-shaped plate portion formed to close the bow-shaped opening at the upper end of the inclined plate body, wherein the upper edge is formed on the same plane as both sides, and the first bow-shaped plate portion is formed to be inclined toward the center of the inclined plate body from a plane perpendicular to the same plane.

[0011] In the first invention, the inclined plate is used in an inclined plate sedimentation device installed in a sedimentation tank at a water treatment plant or the like. This inclined plate includes an inclined plate body formed in an arch shape in the lateral direction, that is, a curved plate shape with the lateral central part convex upward, and a peripheral portion including an upper edge, a lower edge, and both side edges formed to surround the inclined plate body. The inclined plate also has a first arched plate portion formed to close the arched opening at the upper end of the inclined plate body. The upper edge is formed on the same plane as both side edges, and the first arched plate portion is formed to be inclined toward the center of the inclined plate body from a plane perpendicular to that same plane.

[0012] According to the first invention, the inclined plate body is formed in an arch shape and has a first bow-shaped portion, thereby improving the strength of the inclined plate. Furthermore, since the upper edge of the inclined plate is formed on the same plane as both sides and the first bow-shaped portion is formed to tilt towards the center of the inclined plate body, when multiple inclined plates are installed in stages, an appropriate gap can be secured between the upper surface of the upper inclined plate and the upper surface of the lower inclined plate. Therefore, suspended matter that has settled on the inclined plate can be appropriately slid down.

[0013] The second invention is dependent on the first invention and includes a second arched plate-like portion formed to close the arched opening at the lower end of the inclined plate body, the lower edge being formed on the same plane as both sides, and the second arched plate-like portion being formed to be inclined toward the center of the inclined plate body from a plane perpendicular to that same plane.

[0014] According to the second invention, the strength of the inclined plate can be improved more effectively, and suspended matter that has settled on the inclined plate can be slid down more effectively.

[0015] The third invention is dependent on the first or second invention and has sleeve plate portions that are formed to protrude laterally from both ends of the inclined plate body and are slidably fitted into groove-shaped guide members provided on a support frame for supporting the inclined plate.

[0016] According to the third invention, 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 the arch-shaped inclined plate body from deforming in the lateral direction (the arch collapsing). Therefore, the suspended substances sedimented on the inclined plate can be more appropriately slid down, and the inclined plate can be appropriately prevented from falling off the guide members.

[0017] The fourth invention is dependent on the first or second invention, and includes first ribs formed on both sides of the inclined plate body and extending along each of the two side edges.

[0018] According to the fourth invention, the strength of the inclined plate against vertical deflection can be improved, and the deformation of the inclined plate can be more appropriately prevented.

[0019] The fifth invention is dependent on the first or second invention, and includes second ribs formed on the upper side of the inclined plate body and extending along the upper side.

[0020] According to the fifth invention, the strength of the upper part of the inclined plate against vertical deflection can be improved, and the deformation of the upper part of the inclined plate can be more appropriately prevented.

[0021] The sixth invention is dependent on the first or second invention, and the height of the arch of the inclined plate body is set to a size of 50 mm or less.

[0022] The seventh invention is dependent on the second invention, and the curvature of the arc end of the first bow-shaped portion is larger than the curvature of the arc end of the second bow-shaped portion.

[0023] The eighth invention is dependent on the third invention, and includes third ribs formed on the sleeve plate portion and locked by locking portions formed on the guide members.

[0024] According to the eighth invention, even if a force in the direction of coming off from the guide member acts on the sleeve plate portion due to the influence of water flow or the like, the sleeve plate portion is prevented from coming off the guide member, so that the inclined plate can be appropriately prevented from falling.

Advantages of the Invention

[0028] According to this invention, the strength of the inclined plate can be improved, and the suspended substances deposited on the inclined plate can be appropriately slid down.

[0029] The above object, other objects, features, and advantages of this invention will become clearer from the following detailed description of the embodiments made with reference to the drawings.

Brief Description of the Drawings

[0030] [Figure 1] It is a diagram schematically showing an example of a sedimentation tank in which a sedimentation device with an inclined plate according to an embodiment of this invention is installed. [Figure 2] It is a perspective view showing a part of the inclined plate sedimentation device. [Figure 3] It is a longitudinal sectional view showing a part of the inclined plate sedimentation device. [Figure 4] It is a cross-sectional view showing a guide member and an inclined plate provided in the inclined plate sedimentation device. [Figure 5] It is a diagram showing an enlarged view of the peripheral part of the lower end of the guide member of the inclined plate sedimentation device. [Figure 6] It is a perspective view showing the inclined plate. [Figure 7] It is a front view showing the inclined plate. [Figure 8] It is a longitudinal sectional view showing the cross-section of the inclined plate cut along line VIII-VIII in FIG. 7. [Figure 9] It is a cross-sectional view showing the cross-section of the inclined plate cut along line IX-IX in FIG. 7. [Figure 10] It is a perspective view showing a part of an inclined plate sedimentation device according to another embodiment of this invention. [Figure 11] It is a diagram for explaining the problems in an inclined plate having a conventional arch-shaped inclined plate body.

Modes for Carrying Out the Invention

[0031] Referring to Figures 1 and 2, an inclined plate 10, which is one embodiment of this invention, is applied to an inclined plate sedimentation device 14 installed in a sedimentation tank 12 at a water treatment plant or the like, and is used to promote the sedimentation of suspended solids such as sludge in raw water (water to be treated) and to improve the removal efficiency.

[0032] First, before giving a detailed description of the inclined plate 10, we will briefly describe an example of the sedimentation tank 12 and inclined plate settling device 14 used in this embodiment. However, the configuration of the sedimentation tank 12 and inclined plate settling device 14 described below is merely an example and is not limited to this configuration.

[0033] As shown in Figure 1, the sedimentation tank 12 has an inlet 12a formed in one side wall and an outlet 12b formed in the other side wall opposite to the one side wall. An inclined plate sedimentation device 14 equipped with a plurality of inclined plates 10 is installed inside the sedimentation tank 12. The inclined plate sedimentation device 14 is installed using leg members 16 or suspension members, etc., so as to ensure a predetermined space between it and the bottom surface of the sedimentation tank 12. In such a sedimentation tank 12, raw water flowing into the sedimentation tank 12 from the inlet 12a enters a channel formed between the inclined plates 10 from one side of the inclined plate sedimentation device 14 and exits to the other side. At this time, suspended solids contained in the raw water are separated from the raw water by settling and sliding down onto the inclined plates 10. The raw water from which the suspended solids have been removed is discharged as treated water from the outlet 12b.

[0034] Although Figure 1 shows a horizontal flow type as an example of the inclined plate settling device 14, the inclined plates 10 can also be applied to an upward flow type inclined plate settling device. In an upward flow type inclined plate settling device, raw water enters the flow path formed between the inclined plates 10 from the bottom side and exits to the top side.

[0035] As shown in Figures 2 to 4, the inclined plate sinking device 14 comprises a plurality of inclined plates 10, a support frame 20 which is the main frame for supporting the inclined plates 10, and guide members 22 provided on the support frame 20.

[0036] The inclined plates 10 are formed in a rectangular plate shape as a whole, and are arranged in parallel in the thickness direction at a predetermined interval D1, inclined at a predetermined angle θ with respect to the horizontal direction (i.e., upright at an angle). A flow path for raw water is formed between these inclined plates 10 arranged in the thickness direction, and in the lateral flow type inclined plate settling device 14 of this embodiment, the raw water flows along the width direction of the inclined plates 10. The angle of inclination θ is not particularly limited as long as it is an angle at which suspended matter can slide down the inclined plates 10, but it is preferably set to, for example, 30 to 70 degrees. The interval D1 is also not particularly limited, but it is preferably set to, for example, 60 mm or more and 120 mm or less. In this embodiment, the angle of inclination θ is 60 degrees and the interval D1 is 100 mm.

[0037] In this embodiment, the inclined plates 10 are arranged in multiple rows in the vertical direction and in multiple columns in the horizontal direction (the width direction of the inclined plates 10). In this case, the inclined plates 10 arranged vertically are inclined in opposite directions (alternating) to the vertical direction.

[0038] However, in Figures 2 and 3, for the sake of simplifying the drawings, four inclined plates 10 are shown arranged in the thickness direction, and other inclined plates 10 arranged in the thickness direction are omitted. However, the number of inclined plates 10 arranged in the thickness direction can be changed as appropriate. In addition, the number of rows of inclined plates 10 arranged in the vertical direction and the number of columns of inclined plates 10 arranged in the horizontal direction can also be changed as appropriate. The specific configuration of the inclined plates 10 will be described later.

[0039] 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 material, round bar material or long plate material, etc.

[0040] The guide member 22 is a pair of groove-shaped members into which both sides of the inclined plate 10 (the sleeve plate portion 58 described later) are slidably fitted. It is used to guide the inclined plate 10 to the mounting position and to connect and fix the inclined plate 10 to the support frame 20 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 inward (towards the side of the inclined plate 10 being held). In addition, 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 vertical length of the inclined plate 10 (i.e., the lengths of the side edges 10c and 10d described later). In other words, the guide member 22 supports both sides of the inclined plate 10 along its entire length.

[0041] Such guide members 22 are fixed to the horizontal frames 26, which are arranged vertically, using a first fixing pin 28 (see Figure 5) or the like, so as to span diagonally between the horizontal frames 26. When attaching the inclined plate 10 to the support frame 20 and the guide members 22, the lower end of the inclined plate 10 is held, and the inclined plate 10 is inserted between the pair of guide members 22 from below (although it may also be inserted from above) and pushed upward. At this time, both sides of the inclined plate 10 are fitted into the grooves of the guide members 22 and slid, so that the inclined plate 10 is properly guided to its mounting position. When the inclined plate 10 reaches the mounting position, the inclined plate 10 is fixed to the guide member 22 using a second fixing pin 30 (see Figure 5) or the like.

[0042] Next, the configuration of the inclined plate 10 will be specifically described with reference to Figures 6 to 9. As shown in Figures 6 to 9, the inclined plate 10 comprises an arch-shaped inclined plate body 50, a first bow-shaped plate portion 54, a second bow-shaped plate portion 56, and the like. The inclined plate 10 is manufactured, for example, by processing a rectangular flat plate base sheet by vacuum forming. Various synthetic resins and metals can be used as the material for the inclined plate 10, and there are no particular limitations, but it is preferable to use rigid polyvinyl chloride.

[0043] As described above, the inclined plate 10 is formed in a rectangular plate shape overall. The upper edge 10a and lower edge 10b of the inclined plate 10 extend in a straight line parallel to each other, and the first side edge 10c and second side edge 10d of the inclined plate 10 (hereinafter sometimes collectively referred to as "both sides 10c, 10d") extend in a straight line parallel to each other in a direction perpendicular to the upper edge 10a and lower edge 10b. In addition, the upper edge 10a and lower edge 10b of the inclined plate 10 are formed on the same plane as both sides 10c, 10d.

[0044] The inclined plate body 50 is the main part that makes up most of the inclined plate 10, and is formed in an arch shape that extends laterally (width direction), that is, a curved plate shape in which the central part in the later direction is convex upward. The upper surface of this inclined plate body 50 (the surface on which suspended material slides off) is a smooth curved surface without irregularities (i.e., no ribs are formed). The peripheral edge 52 of the inclined plate 10, including the upper edge 10a, lower edge 10b and both side edges 10c, 10d described above, is formed to surround the inclined plate body 50.

[0045] Furthermore, a first arched plate-like portion 54 is formed at the upper end of the inclined plate body 50, so as to close the arched opening formed on the lower surface side of the inclined plate body 50. This first arched plate-like portion 54 is formed to be inclined toward the center of the inclined plate body 50 than the plane F which is perpendicular to the same plane on which the upper edge 10a, lower edge 10b and both side edges 10c, 10d are formed. In other words, the first arched plate-like portion 54 is not formed in the direction of plane F, but is formed to be inclined downward with respect to the direction of plane F so as to recede into the inclined plate body 50.

[0046] On the other hand, a second bow-shaped plate portion 56 is formed at the lower end of the inclined plate body 50 so as to close the bow-shaped opening formed at the lower end. This second bow-shaped plate portion 56 is also formed to be inclined toward the center of the inclined plate body 50 than the plane F which is perpendicular to the same plane on which the upper edge 10a, lower edge 10b and both side edges 10c, 10d are formed. In other words, the second bow-shaped plate portion 56 is not formed in the direction of plane F, but is formed to be inclined upward with respect to the direction of plane F so as to recede into the inclined plate body 50.

[0047] The curvature of the arc end 54a of the first arch-shaped portion 54 is set to be greater than the curvature of the arc end 56a of the second arch-shaped portion 56. That is, the inclination angle θ1 of the first arch-shaped portion 54 with respect to the direction of plane F is set to be greater than the inclination angle θ2 of the second arch-shaped portion 56 with respect to the direction of plane F. Furthermore, the inclination angle θ1 of the first arch-shaped portion 54 is set so that when the inclined plate 10 is installed at a predetermined inclination angle θ, the upper surface of the first arch-shaped portion 54 maintains a predetermined downward slope. In this embodiment, the inclination angle θ1 of the first arch-shaped portion 54 is 78 degrees, and the inclination angle θ2 of the second arch-shaped portion 56 is 60 degrees.

[0048] Furthermore, the inclined plate 10 is provided with vertically elongated rectangular side plate portions 58 that protrude laterally (outward) from both ends of the inclined plate body 50. The outer portions of these side plate portions 58 are fitted into the guide member 22 so as to be slidable. In addition, on the inner portion of each side plate portion 58, that is, on both sides of the inclined plate body 50, ribs 60 (first ribs) are formed in a substantially trapezoidal shape that is convex upward and extend along the side edges 10c and 10d of the inclined plate 10, respectively. Furthermore, on the outer portion of each side plate portion 58, that is, the portion fitted into the guide member 22, small ribs 62 (third ribs) are formed that are convex upward and extend along the side edges 10c and 10d of the inclined plate 10, respectively. These small ribs 62 are locked by the locking portion 22d of the guide member 22 when the side plate portion 58 is fitted into the groove of the guide member 22 (see Figure 4).

[0049] The presence of these ribs 60 and 62 improves the strength of the inclined plate 10 against vertical deflection, thereby effectively preventing deformation of the inclined plate 10. Furthermore, while suspended matter (sediment) that settles on the upper surface of the arch-shaped inclined plate body 50 will slide downwards while separating to the left and right, the presence of ribs 60 on both sides of the inclined plate body 50 prevents the suspended matter that separates to the left and right on the upper surface of the inclined plate body 50 from sliding down as a clump in the groove between the side of the inclined plate body 50 and the ribs 60. This allows the suspended matter to slide down more effectively. In addition, even if a force acting in the direction of detachment (i.e., inward) from the guide member 22 is applied to the sleeve plate portion 58 due to the influence of water flow or the like, the small ribs 62 are locked by the locking portion 22d of the guide member 22, preventing the sleeve plate portion 58 from detaching from the guide member 22 and preventing the inclined plate 10 from falling.

[0050] Furthermore, fixing holes 64 are formed at both ends of the sleeve plate portion 58, through which the second fixing pin 30 described above is inserted. By inserting the second fixing pin 30 through these fixing holes 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.

[0051] Furthermore, the inclined plate 10 has a laterally elongated rectangular plate-shaped extension formed to project upward (outward) from the upper end of the inclined plate body 50 and the first bow-shaped plate portion 54. A rib 66 (second rib) is formed on this extension, which is roughly triangular in shape and convex upward, and extends along the upper edge 10a of the inclined plate 10. The presence of this rib 66 improves the strength of the upper end of the inclined plate 10 against lateral deflection, thereby more reliably preventing deformation of the upper part of the inclined plate 10.

[0052] Furthermore, the ribs 60, 62, and 66 mentioned above are particularly effective when attaching the inclined plate 10 to the guide member 22. When the lower end of the inclined plate 10 is held and pushed up from below, the ribs prevent the inclined plate 10 from bending (sagging) downwards and also prevent the upper end of the inclined plate 10 from bending laterally, making it easier to insert the inclined plate 10 between the pair of guide members 22.

[0053] Furthermore, the size of the inclined plate 10 and each part of the inclined plate 10 is not particularly limited, but considering the ease of installation of the inclined plate 10, it is desirable that the length of each side of the inclined plate 10 be set to a size of, for example, 600 mm to 1500 mm. In this embodiment, the vertical length L1 of the inclined plate 10 (i.e., the lengths of both sides 10c and 10d) is 1200 mm, and the horizontal length W1 of the inclined plate 10 (i.e., the lengths of the top side 10a and the bottom side 10b) is 1000 mm. Also in this embodiment, the vertical length L2 of the inclined plate body 50 is 1120 mm, and the horizontal length W2 of the inclined plate body 50 is 840 mm.

[0054] Furthermore, the arch height T of the inclined plate body 50 is preferably set to a size of, for example, 10 mm or more and 50 mm or less, and more preferably set to a size of, for example, 20 mm or more and 50 mm or less. This is because if the arch height T of the inclined plate body 50 is greater than 50 mm, it may interfere with the installation and replacement work of the inclined plates 10 when the inclined plates 10 are arranged in parallel at the minimum spacing d1 (for example, 60 mm) in the thickness direction. Also, if the arch height T of the inclined plate body 50 is less than 20 mm, the effect of improving strength (i.e., making it less prone to deformation) by making the inclined plate body 50 arched will be reduced, and if the arch height T of the inclined plate body 50 is less than 10 mm, the effect of improving strength will be greatly reduced. In this embodiment, the arch height T of the inclined plate body 50 is 50 mm.

[0055] In this inclined plate 10, since the inclined plate body 50 is formed in an arch shape, its strength against loads from above is increased compared to when it is formed in a flat shape. Therefore, the number of reinforcing ribs formed on the inclined plate 10 can be reduced, while preventing the inclined plate 10 from bending (deforming) due to the accumulation of suspended matter on the inclined plate 10. In particular, in this embodiment, both sides of the inclined plate 10 (side plate portions 58) are supported by guide members 22 along their entire length in the longitudinal direction, so compared to simply fixing the four corners of the inclined plate 10, the reaction force generated when a load is applied from above can be appropriately supported. As a result, deformation in which the arch-shaped inclined plate body 50 expands laterally (the arch collapses) can be more reliably prevented, and the inclined plate 10 can be appropriately prevented from falling off the guide members 22.

[0056] In particular, this embodiment includes a first arched plate portion 54 formed to close the arched opening at the upper end of the inclined plate body 50. This allows the load from above on the inclined plate body 50 to be released in the tangential direction of the arc end 54a, thereby improving the strength of the upper part of the inclined plate 10. This effectively prevents deformation of the upper part of the inclined plate 10, preventing the sliding performance of suspended matter from decreasing due to deformation of the inclined plate 10 and preventing the accumulation of suspended matter on the inclined plate 10. Furthermore, since the upper edge 10a of the inclined plate 10 is formed on the same plane as both side edges 10c and 10d, and the first arched plate portion 54 is formed to be inclined toward the center of the inclined plate body 50 from a plane F perpendicular to that same plane, when multiple inclined plates 10 are installed in stages, the gap 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 (see Figure 3). Therefore, suspended matter can be appropriately slid off. Furthermore, by providing the first arched plate portion 54, the arched inclined plate body 50 does not protrude from the upper fixing position of the inclined plate 10, making it easier to fix the inclined plate 10.

[0057] Furthermore, in this embodiment, a second arched plate portion 56 is provided that is formed to close the arched opening at the lower end of the inclined plate body 50. This allows the load from above on the inclined plate body 50 to be released in the tangential direction of the arc end 56a, thereby improving the strength of the lower part of the inclined plate 10. This effectively prevents deformation of the lower part of the inclined plate 10, and more effectively prevents the accumulation of suspended material on the inclined plate 10 due to a decrease in the sliding performance of suspended material caused by deformation of the inclined plate 10. In addition, since the lower edge 10b of the inclined plate 10 is formed on the same plane as both side edges 10c and 10d, and the second arched plate portion 56 is formed so as to be inclined toward the center of the inclined plate body 50 than the plane F perpendicular to that same plane, when multiple inclined plates 10 are installed in stages, the gap D2 between the upper surface of the upper inclined plate 10 and the upper surface of the lower inclined plate 10 can be more effectively secured (see Figure 3). Therefore, suspended material can be slid off more effectively. Furthermore, by providing the second arched plate portion 56, the arched inclined plate body 50 does not protrude from the lower fixing position of the inclined plate 10, making it easier to fix the inclined plate 10.

[0058] Furthermore, in this embodiment, ribs are not formed on the main body 50 of the inclined plate 10 (the part where suspended solids in water mainly settle), and the upper surface of the inclined plate body 50 is a smooth curved surface without irregularities. This reduces water flow resistance and improves flow characteristics. In addition, it reduces the amount of sediment that accumulates on the inclined plate 10, preventing performance degradation due to bending of the inclined plate 10 and reducing maintenance costs such as cleaning.

[0059] As described above, according to this embodiment, since the inclined plate body 50 is formed in an arch shape and has a first bow-shaped plate portion 54, the strength of the inclined plate 10 can be appropriately improved without forming reinforcing ribs or the like on the inclined plate body 50. Furthermore, since the upper edge 10a of the inclined plate 10 is formed on the same plane as both side edges 10c and 10d, and the first bow-shaped plate portion 54 is formed to tilt towards the center of the inclined plate body 50, when the inclined plates 10 are installed in multiple stages, the gap 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, suspended matter that has settled on the inclined plate 10 can be appropriately slid down.

[0060] Furthermore, according to this embodiment, since the second bow-shaped portion 56 is present, the strength of the inclined plate 10 can be improved more appropriately, and suspended matter that has settled on the inclined plate body 50 can be slid down more appropriately.

[0061] Furthermore, according to this embodiment, since both sides of the inclined plate 10 are supported by the guide members 22, deformation such as the arch-shaped inclined plate body 50 expanding laterally (collapse of the arch) can be prevented more reliably, and the inclined plate 10 can be properly prevented from falling off the guide members 22.

[0062] In the above embodiment, the inclined plates 10 are arranged in two stages vertically, but as mentioned above, the number of stages of the inclined plates 10 is not particularly limited, and as shown in the embodiment in Figure 10, the inclined plates 10 may be arranged in only one stage. Even when the inclined plates 10 are arranged in only one stage, the strength of the inclined plates 10 can be appropriately improved by forming the inclined plate body 50 in an arch shape and having the first bow-shaped plate portion 54, thereby preventing deformation of the inclined plates 10 and, consequently, allowing suspended matter that has settled on the inclined plates 10 to slide off appropriately. In addition, since the suspended matter that has settled on the upper surface of the inclined plate body 50 tends to gather on the left and right sides (both sides in the width direction), the secondary coagulation effect is increased, allowing the suspended matter to slide off more appropriately.

[0063] Please note that the specific dimensions and shapes mentioned above are merely examples and can be modified as needed according to product specifications and other requirements. [Explanation of Symbols]

[0064] 10...slanted plate 12... sedimentation tank 14. Inclined plate sinking device 20 ... Support frame 22 ... Guide member 50...Slanted plate body 52 ... Peripheral area 54...first arcuate section 56...Second arcuate section 58...Sleeve plate part 60... Rib (1st rib) 62... Small rib (3rd rib) 66... ​​Rib (2nd rib)

Claims

1. An inclined plate used in an inclined plate sinking device, The main body of the inclined plate is formed in an arch shape in the horizontal direction. Peripheral portions including the upper edge, lower edge and both sides formed to surround the inclined plate body, It comprises a first arched plate-shaped portion formed to close the arched opening at the upper end of the inclined plate body, The upper edge is formed on the same plane as the two side edges. An inclined plate in which the first bow-shaped portion is formed to be inclined toward the center of the inclined plate body than a plane perpendicular to the same plane.

2. It includes a second arched plate-shaped portion formed to close the arched opening at the lower end of the inclined plate body, The lower edge is formed on the same plane as the two side edges. The inclined plate according to claim 1, wherein the second bow-shaped portion is formed to be inclined toward the center of the inclined plate body than the plane perpendicular to the same plane.

3. The inclined plate according to claim 1 or 2, having sleeve plate portions formed to protrude laterally from both ends of the inclined plate body and fitted into groove-shaped guide members provided on a support frame for supporting the inclined plate in a slidable manner.

4. The inclined plate according to claim 1 or 2, further comprising first ribs formed on both sides of the inclined plate body and extending along each of the two side edges.

5. The inclined plate according to claim 1 or 2, further comprising a second rib formed on the upper side of the inclined plate body and extending along the upper edge.

6. The inclined plate according to claim 1 or 2, wherein the height of the arch of the inclined plate body is set to a size of 50 mm or less.

7. The inclined plate according to claim 2, wherein the curvature of the arc end of the first arch-shaped portion is greater than the curvature of the arc end of the second arch-shaped portion.

8. 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.

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