JPH075845Y2 - Settling inclined plate - Google Patents

Description

TECHNICAL FIELD The present invention relates to a settling inclined plate used in an inclined plate settling device for settling and separating suspended solids in wastewater in a settling tank, for example.

2. Description of the Related Art Generally, solid-liquid separation for separating suspended solids in wastewater is indispensable in wastewater treatment processes. Among them, sedimentation separation operation is particularly important in water supply and industrial water supply. First of all, it is widely used for sewage treatment and industrial wastewater treatment.

In recent years, settling basins equipped with sloping plate settling devices have become widespread, and attention has been focused on the downsizing of the settling basins and the drastic improvement of the precipitation efficiency.

As a settling slant plate used in such a slanting plate settling device, conventionally, a large annular rib is provided on the peripheral portion of the settling slanting plate body that is square when viewed from the front and tilted at a required angle when viewed from the side. It is already known that a small annular rib is provided on the inside of the annular rib, and connecting ribs whose both ends are connected to the both annular ribs are provided (for example, Kokoku Shosho).
53-21809).

Problems to be Solved by the Invention Such a conventional settling inclined plate has a large number of ribs, and therefore has a high mechanical strength, but the connecting rib has four corner portions of the inner and outer annular ribs. Connected to
Since the upper and lower lateral ribs of the small annular rib are inclined at 45 °, the smooth sedimentation of suspended solids is hindered by these ribs, and there is a problem that the wastewater treatment efficiency is poor.

Moreover, the end parts of the settling inclined plates arranged in two steps above and below,
Since they are only butted against each other, the back flow that rises along the back surface of the lower settling ramps collides with suspended solids that descend in the wide gap between the upper ramps, resulting in There was a problem that the wastewater was agitated and the wastewater treatment efficiency was lowered.

The object of the present invention is to solve the above-mentioned problems of the prior art and to have very high mechanical strength and therefore excellent durability,
Moreover, the upper and lower settling inclined plates can be firmly connected, and since there are few horizontal ribs, the smooth settling of suspended solids can be promoted, and the wastewater treatment efficiency is remarkably excellent. The backflow that rises along the backside of the lower settling sloping plate can be quickly guided to the backside of the upper sloping plate, so that the wastewater to be treated is not agitated and the solid-liquid is separated very quickly. There is an object to provide a settling sloping plate whose processing efficiency is greatly increased.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention is provided with an annular rib at a peripheral portion of a settling sloping plate main body which is rectangular when viewed from the front and is inclined at a required angle when viewed from the side. A plurality of reinforcing vertical ribs that connect the upper horizontal ribs and the lower horizontal ribs of the annular rib are provided at predetermined intervals, and the side vertical ribs and the reinforcing vertical ribs of the annular rib are adjacent to each other. An inclined surface part for preventing flock deposits is provided at the lower end of the flock sinking concave part formed between each of the two reinforcing vertical ribs, and a vertical wall part is provided continuously to the upper edge of the upper horizontal rib of the annular rib. At the lower edge of the lower horizontal rib of the annular rib, a hanging wall portion including both hanging end portions and an intermediate bulging portion that bulges toward the surface side in the middle thereof is provided in a row. Vertical wall of settling sloping plate placed in Between the portion and the hanging wall portion, there is formed a clearance for passage of the back flow rising along the back surface of the lower settling inclined plate,
The main point is a settling inclined plate.

The upper lateral rib of the annular rib of the body of the settling slant plate is provided with a reinforcing convex portion having a cross section of approximately 7 shape projecting to the back side of the rib over substantially the entire length of the horizontal rib, thereby making the machine of the settling slant plate. Target strength is further increased.

As the material of the above-mentioned settling inclined plate, it is preferable to use a material that is lightweight, has excellent corrosion resistance and is inexpensive, and for this, a synthetic resin such as polyethylene, polypropylene or polyvinyl chloride is used. Of these, it is preferable to use hard polyvinyl chloride.

Embodiment Next, an embodiment of the present invention will be described with reference to the drawings.

In this specification, front and rear, left and right are based on FIG. 4,
The front means the front side of the sheet in FIG. 4, the rear means the back side, the left means the left side in the figure, and the right means the right side.

First, referring to FIG. 5, the slant plate settling device (10) includes support columns (1) arranged at four corners and at required intermediate positions so as to face each other.
And up and down 3 between the pillars (1) (1) that face each other on the left and right
Horizontal crosspieces (3) and (3) that are horizontally stopped on the steps, and the horizontal crosspieces (3) and (3) are inclined in parallel to each other through attachments (6) and (7) at about 60 °. It is provided with a settling sloping plate (2) of a square shape when viewed from the front according to the present invention, which is delivered to the above state.

FIG. 1 showing the details of the settling inclined plate (2) according to the present invention.
In FIG. 4, the settling inclined plate (2) is provided with an annular rib (13) on the peripheral edge of the settling inclined plate body (12) which is rectangular when viewed from the front and inclined about 60 ° when viewed from the side. The upper horizontal rib (13a) and the lower horizontal rib (13) of the annular rib (13)
Two reinforcing vertical ribs (14) for connecting with b) are provided at a predetermined interval from each other. Then, a flock sinking recess ((a) formed between the side vertical ribs (13c) and the reinforcing vertical ribs (14) of the annular rib (13) and between two adjacent reinforcing vertical ribs (14), respectively. An inclined surface portion (16) for preventing flock deposits is provided at the lower end of 15). In addition, the upper horizontal rib (13a) has a substantially horizontal cross section protruding toward the back surface side of the rib (13a). Reinforcing protrusions (21) having a shape are provided over substantially the entire length of the lateral ribs (13a).

Further, a vertical wall portion (17) is provided continuously on the upper edge portion of the upper horizontal rib (13a) of the annular rib (13), and at the lower edge portion of the lower horizontal rib (13b) of the annular rib (13), A hanging wall portion (18) composed of both hanging end portions (18a) (18a) and an intermediate bulging portion (18b) bulging to the surface side in the middle between them is provided in series, and is arranged in two steps above and below. Between the vertical wall portion (17) and the hanging wall portion (18) of the settling inclined plates (2) (2), there is a clearance for passage of a back flow rising along the back surface of the lower settling inclined plate (2) ( 20) is formed.

The settling inclined plate (2) is made of hard polyvinyl chloride by vacuum / pressure forming or flat plate press forming. Further, all of the columns (1), the horizontal rails (3) and the vertical rails (4) are made of a rigid polyvinyl chloride pipe.

In the middle part of the inclined plate settling device (10), the four corner portions (2a) of the settling inclined plate (2) are respectively attached to the cross rails (3) and (3) by the fittings (6) and (7). It is fixed.

In addition, at both left and right ends of the settling device (10), a horizontal vertical bar (4) is provided between columns (1) (1) facing each other in the front-rear direction.
Are vertically stacked at predetermined intervals in a multi-stage manner, and the inclined plates (2) near the left and right ends of the sedimentation device become narrower in order as they approach the left and right ends.

These settling inclined plates (2) are sequentially passed to the horizontal bars (3) (3) and the vertical bars (4) of a predetermined level, so that each settling inclined plate (2).
The projecting width from the vertical bar (4) is substantially constant.

Then, the upper edge or the lower edge of each sinking inclined plate (2) is attached to the horizontal crosspieces (3) and (3) through the fittings (6) and (7), and below the sinking inclined plate (2). Hooks (8) are attached to the edge portion or the upper edge portion, and these hooks (8) are hooked on the vertical rails (4).

In addition, the settling slant plate (2) having a narrow vertical width at both left and right ends of the slant plate settling device (10) is, for example, a normal size settling slant plate (2) cut into a predetermined width, or a flat synthetic resin. Since it is enough to cut the plate to a predetermined width and use it,
The production of these inclined plates (2) is easy.

FIG. 6 to FIG. 8 show details of the settling inclined plate attachments (6) and (7).

First, the slant plate mounting tool (6) shown in FIGS. 6 and 7 has two corner plates (2a) (2a) of the front and rear slant plates (2) (2).
Are fixed together on a horizontal cross rail (3).

The fitting (6) is made of a synthetic resin, has a substantially horseshoe shape when viewed from the front in which the inside is enlarged from the lower end opening, and is attached to a predetermined position of the cross rail (3) so as to be covered.
And at a right angle to the top of this mounting part (23),
In addition, a plate-like connecting portion (24) provided so as to extend upward and to both sides, and a settling inclined plate fixing overhanging portion (provided at both ends of the plate-like connecting portion (24) for extending these ( 2
5) and (25) are provided.

Further, a positioning projection (27) is provided in a downward protruding shape at the center of the inner surface of the mounting portion (23), while positioning holes (28) are provided at predetermined intervals at the center of the upper surface of the horizontal rail (3). It is opened every other time. In addition, each overhanging part (2
A bolt hole (26) is drilled in the center of 5), while
A bolt hole (22) is also formed in the corner portion (2a) of each inclined plate (2).

In the inclined plate mounting member (6), the side wall lower end portions (23a) (23a) of the mounting portions (23) on both sides of the lower end opening have a spring action based on the elasticity of the material, and the mounting portion (23) A horizontal rail (3)
Then, when the crosspiece (3) is fitted over the lower end opening thereof, the lower end portions (23a) (23a) of the side walls of the mounting portion (23) are spread out against the elastic force of the material. The fitting (6) can be attached to the cross rail (3) with one touch. At this time, by fitting the positioning projection (27) of the fixture (6) into the positioning hole (28) of the horizontal rail (3), the fixture (6) can be positioned with respect to the horizontal rail (3). It is certainly done.

Then, in this state, the protrusions (25) on both sides of the fixture (6)
The corners (2a) (2a) of the two inclined plates (2) (2) on the front and rear sides are superposed on the (25), and the bolts (29) are fitted into these bolt holes (26) (22). By being inserted and tightened with a nut (not shown), the two inclined plates (2) and (2) are attached to the horizontal crosspiece (3) via one fixture (6).
Are fixed together.

Next, the inclined plate attachment (7) shown in FIG. 8 has a configuration in which the corner portion (2a) of one inclined plate (2) is horizontal at the front edge or the rear edge of the settling device (10). It is fixed to the horizontal rail (3).

Here, the point different from the case of the attachment (6) is that a protrusion for fixing the settling inclined plate that extends the plate-like connecting portion (24) provided on the approximately horseshoe-shaped attaching portion (23) is provided. A portion (25) is provided, and the corner portion (2a) of one inclined plate (2) is superposed on the overhanging portion (25) and is fixed by tightening with a bolt (29) and a nut (not shown). There is a point to be.

Although the detailed illustration of the hook (8) is omitted,
This is made of synthetic resin, and is composed of a strip-plate-shaped mounting wall portion having an engaging protrusion on the back surface, and a hooking portion which is connected to the lower edge of the strip-shaped mounting wall portion and has a substantially rectangular shape when viewed from the front. Hook (8)
The hook (8) can be attached to the inclined plate (2) by one-touch by inserting the engaging protrusion of (3) into the insertion hole formed in the predetermined position of the sedimentation inclined plate (2).

In the middle part of the inclined plate settling device (10), the four corner portions (2a) of the settling inclined plate (2) are respectively attached to the cross rails (3) and (3) by the fittings (6) and (7). It is firmly fixed.

At both left and right ends of the settling device (10), a settling inclined plate (2) having a narrower vertical width in order is attached to the cross rail (3) by means of the fittings (6) (7) and the hook (8).
It is firmly fixed to (3) and the vertical bar (4) of a predetermined level. Therefore, during operation of the settling device (10), these inclined plates (2) do not vibrate up and down, so that the wastewater to be treated is not stirred and the solid-liquid is separated very quickly, and the wastewater is drained. The processing efficiency is greatly increased.

It should be noted that, of the settling inclined plates (2) and (2) arranged in two steps, the two corners (2a) at the upper end of the lower inclined plate (2) and the two corners at the lower end of the upper inclined plate (2). By attaching the corners (2a) to the common fixtures (6) and (7), respectively, the intermediate bulge (18) between the vertical wall (17) and the depending wall (18) is attached.
b) and are opposed to each other, and a back flow passage gap (20) is formed between them.

For this reason, when this inclined plate settling device (10) is installed in, for example, a sedimentation tank, as shown in FIG. 4, suspended solids in the wastewater are disposed in two opposed inclined plates (2) ( 2) Between the comrades, they settle and separate through a wide space,
The back flow that rises along the back surface of the lower sedimentation sloping plate (2) rises through the passage gap (20) between the upper and lower sloping plates (2) and (2), and solid-liquid is separated very quickly. It is done like this.

Effect of the Invention As described above, the sinking inclined plate according to the present invention is provided with an annular rib on the periphery of the sinking inclined plate main body that is rectangular when viewed from the front and inclined at the required angle when viewed from the side. Since a plurality of reinforcing vertical ribs connecting the horizontal ribs and the lower horizontal ribs are provided at a predetermined interval from each other, the mechanical strength is very high and therefore the durability is also excellent. Since the number of horizontal ribs is small and the number of horizontal ribs is small, smooth sedimentation of suspended solids can be promoted. Further, a floc sedimentation preventing inclined surface portion is provided at a lower end portion of a floc sinking concave portion formed between the side vertical ribs and the reinforcing vertical ribs of the annular rib and between two adjacent reinforcing vertical ribs. Therefore, the accumulation of flocs in the drainage can be effectively prevented.

A vertical wall is continuously provided at the upper edge of the upper horizontal rib of the annular rib, and at the lower edge of the lower horizontal rib of the annular rib, both ends of the hanging shape and bulge toward the surface side in the middle thereof. By connecting the vertical wall of the settling inclined plate and the both ends of the settling wall, which are arranged in two steps, the lower and upper settling plates are connected in series. In addition to being able to firmly connect, there is formed a gap between the vertical wall portion and the hanging wall portion for the passage of the back flow that rises along the back surface of the lower settling sloping plate. Therefore, the back flow that rises along the back surface of the lower settling sloping plate can be promptly guided to the back surface of the upper sloping plate, so that the wastewater to be treated is not stirred and the solid-liquid is separated very quickly. The effect of significantly increasing wastewater treatment efficiency. Achieve the.

The intermediate bulging portion provided on the lower edge of the lower horizontal rib of the annular rib so as to bulge toward the surface side also functions as a reinforcing rib, and the upper lateral rib of the annular rib has Cross section protruding to the back side By providing the reinforcing protrusions in the shape over substantially the entire length of the lateral rib, the strength of the settling inclined plate is further increased.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is an enlarged front view of a sinking inclined plate according to the present invention, and FIG. 2 is a side view of the same.
FIG. 3 is an enlarged cross-sectional view taken along the line III-III in FIG. 1, and FIG. 4 is an enlarged cross-sectional view of the sedimentation sloping plate, showing an arrangement state of the upper and lower sedimentation sloping plates. FIG. 5 is a partial perspective view of the slanting plate sinking device, FIG. 6 is an enlarged perspective view of a sinking slanting plate mounting part by a fixture, FIG. 7 is an enlarged sectional view taken along line VII-VII of FIG. The figure is an enlarged perspective view of the mounting portion of the sinking slope plate by another mounting tool. (1) ... Posts, (2) ... Settling inclined plate, (3) ... Horizontal bars,
(6) (7) ... Mounting fixture, (10) ... Slanting plate settling device, (1
2) ... Settling inclined plate body, (13) ... Annular rib, (13a) ... Upper lateral rib, (13b) ... Lower lateral rib, (13c) ... Side vertical rib, (14) ... Reinforcing vertical rib, (15) ) ... Floc sinking concave part, (16) ... Floc sedimentation preventing inclined surface part, (17) ... Vertical wall part, (18) ... Suspending wall part, (18a) (18a) ... Suspending end parts, (18b) ... Intermediate bulge, (20) ... Back flow passage gap, (21) ... Reinforcement protrusion.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Sadao Nomura 3-13-2 Tomigaoka, Nara, Nara

Claims (2)

[Scope of utility model registration request] 1. An annular rib (13) is provided on a peripheral edge of a settling inclined plate body (12) which is rectangular as viewed from the front and is inclined at a required angle when viewed from the side, and an upper lateral rib of the annular rib (13). A plurality of reinforcing vertical ribs (14) connecting the (13a) and the lower horizontal ribs (13b) are provided at predetermined intervals, and the reinforcing vertical ribs (13c) and the side vertical ribs (13c) of the annular rib (13) are provided. Ribs (14)
And a pair of reinforcing vertical ribs (14) adjacent to each other, a floc sedimentation preventing inclined surface portion (16) is provided at a lower end portion of a flock sinking concave portion (15) formed respectively, A vertical wall portion (17) is provided continuously on the upper edge portion of the upper horizontal rib (13a) of the rib (13), and a hanging shape is formed on the lower edge portion of the lower horizontal rib (13b) of the annular rib (13). Settling slopes arranged in two steps, in which a hanging wall portion (18) consisting of both end portions (18a) (18a) and an intermediate bulging portion (18b) bulging to the surface side in the middle thereof is provided in series Between the vertical wall part (17) and the depending wall part (18) of the plates (2) (2), a clearance (20) for passage of the back flow rising along the back surface of the lower settling inclined plate (2). Settling sloping plate that is designed to form. 2. A cross-section of an upper portion of a rib (13a) of an annular rib (13) of a settling inclined plate body (12), the cross-section of which protrudes toward the back side of the rib (13a). The settling inclined plate according to claim 1, wherein the reinforcing protrusions (21) having a shape are provided over substantially the entire length of the lateral ribs (13a).