JP3471307B2 - Sawtooth type lattice plate of step type filter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a saw-toothed grid plate for a step type filtering machine.

[0002]

2. Description of the Related Art Conventionally, a step-type filter is installed in a waterway such as a sewer with an inclination with respect to the waterway to remove solid matter such as foreign matters flowing on the surface of the wastewater or the wastewater. It is designed to be collected and discharged outside the waterway.

FIG. 2 is a perspective view showing an arrangement state of a conventional step type filter, FIG. 3 is a side sectional view of the conventional step type filter, and FIG.
Is a side view of the movable grid plate in the conventional staircase filter, FIG. 5 is an enlarged view showing the main part of the movable grid plate in the conventional staircase filter, and FIG. 6 is the transfer of solid matter in the conventional staircase filter. FIG. 8 is a first side view showing a state, FIG. 7 is a first perspective view showing a state in which a solid material is transferred in a conventional stair type filter, and FIG.
Is a second side view showing the transfer state of solid matter in the conventional staircase filter, FIG. 9 is a second perspective view showing the transfer state of solid matter in the conventional staircase filter, and FIG. 10 is a conventional staircase. FIG. 11 is a third side view showing the transfer state of the solid matter in the conventional filter, FIG. 11 is a third perspective view showing the transfer condition of the solid matter in the conventional step filter, and FIG. 12 is the conventional step filter. FIG. 13 is a diagram showing a first improved example, and FIG. 13 is a diagram showing a second improved example in the conventional stair type filtering machine.

In the figure, 10 is a movable lattice part, 20 is a fixed lattice part, 30 is a drive mechanism, and 40 is a filter frame. The movable lattice part 10, the fixed lattice part 20, and the drive mechanism 3 are shown.
0, the filter frame 40, and the like form a step-type filter that is arranged so as to be inclined with respect to the water channel.

The fixed grid portion 20 is formed by fixing a plurality of fixed grid plates 21 made of a long plate material to a fixed frame F, and each fixed grid plate 21 is processed into a step shape at right angles. The step surface 21A is provided. Further, the movable grid portion 10 is made of a long plate material, and is fixed grid plate 2
1 is formed by fixing a plurality of movable lattice plates 11 having the same shape and dimensions as those of No. 1 to the moving frame R, and each movable lattice plate 11 is processed into a step shape of a right angle, and the step surface 11
A and a step surface 11B are provided. The movable lattice plates 11 and the fixed lattice plates 21 are alternately arranged, and the movable lattice plates 11 are inserted between the adjacent fixed lattice plates 21.

The drive mechanism 30 comprises a motor 3A, a speed reducer 3B and a motion mechanism 3C. The motor 3A is driven, the generated rotation is decelerated by the speed reducer 3B, and the movable lattice part is moved through the motion mechanism 3C. When transmitted to 10, the movable grid portion 10 is caused to move circularly.

By the way, in FIGS. 4 and 5, the broken line is
It is a locus Q of a circular movement of the movable lattice portion 10, and the locus Q is represented by a perfect circle. Then, as the movable lattice part 10 is circularly moved in the direction of the arrow along the locus Q, the movable lattice part 10 lifts the solid object S on each stair surface 21A of the fixed lattice plate 21, Place them on the upper stairs 21A. In this way, the step-type filter collects the solid matter S such as impurities flowing on the surface of the wastewater or the wastewater and discharges it to the outside of the water channel.

In this case, when the points of the adjacent peaks of the movable grid plate 11 and the fixed grid plate 21 are A and B, and the point of the valley between the adjacent peaks is C, the locus Q is , The movable grid plate 11 is set so as to pass slightly outside the points A to C around the center point P between the points A and B. Therefore, since the locus Q passes slightly outside the point B, the solid object S is placed on the staircase surface 2 on the fixed grid plate 21.
It can be placed a little inward on 1A with stability. Further, since the locus passes slightly outside the point C, the points A and B on the movable lattice plate 11 are the points C on the fixed lattice plate 21.
It does not touch the solid object S placed in the vicinity of.

In this way, the movable grid portion 20 is circularly moved, and from the first stage shown in FIGS. 6 and 7, the second stage shown in FIGS. 8 and 9, and the third stage shown in FIGS. 10 and 11. By repeating this cycle, the solid objects S on each stair surface 21A are placed one by one on the upper stair surface 21A and are transferred upward. Then, the solid matter S transferred to the uppermost staircase surface 21A is discharged to the outside of the water channel via a conveyor (not shown).

[0010]

However, in the above-mentioned conventional staircase type filtering machine, since the movable lattice plate 11 and the fixed lattice plate 21 are formed in a stepwise manner at right angles, the solid material S
In order to stably transfer the sheet to the front side (the right side in FIG. 5) without slipping off, it is necessary to make each stair surface 11A, 21A horizontal, and as a result, the inclination of the movable lattice plate 11 and the fixed lattice plate 21 is increased. That is, it is necessary to set the installation angle of the step filter to 45 [°].

By the way, in recent years, in urban sewage treatment facilities, the depth of the water channel should be set to 2.5 to 7 [m] in consideration of the time of heavy rainfall and the time of frequent occurrence of floods. There are many. However, the installation angle of the staircase type filter is 45
In the case of [°], when the water channel becomes deep, the movable grid plate 11
Since the fixed grid plate 21 becomes longer by that amount, the size of the step filter becomes large and the step filter becomes structurally unstable. Therefore, for example, if the depth of the water channel is 2.7 [m] or more, it becomes impossible to design the step filter.

Therefore, as in the first modified example shown in FIG. 12, the installation angle of the step type filter is increased to, for example,
It is possible to set it to 75 [°]. In this case, even if the depth of the water channel is 2.7 [m] or more, it is not necessary to lengthen the movable grid plate 11 and the fixed grid plate 21, and the size of the step filter can be reduced, and The step type filter can be structurally stabilized.

However, the installation angle of the step type filter is set to 75
When set to [°], each of the stair surfaces 11A and 21A inclines obliquely downward in the direction opposite to the flow direction of the wastewater (left direction in FIG. 12), and the solid object S moves to the front side (right side in FIG. 12). It slips off.

Therefore, as in the second improved example shown in FIG. 13, it is conceivable to make each step surface horizontal.

In FIG. 13, reference numeral 41 denotes a sawtooth type lattice plate (movable lattice plate and fixed lattice plate), and the sawtooth type lattice plate 41.
Is a plurality of step surfaces 41A that are horizontal to the water surface, and a step that is formed by inclining inward (left side in the figure) from the tip end portion of the step surfaces 41A and that connects the step surfaces 41A. With surface 41B.

Then, the installation angle of the stair type filter equipped with the saw-tooth grid plate 41 is increased (for example, 75 [°]).
Then, the locus of the circular movement of the sawtooth grid plate 41 indicated by the broken line is E and F at the points of the adjacent peak portions of the sawtooth grid plate 41, and G is the point of the valley portion sandwiched by the respective peak portions.
Then, the center point P between the points E and F is set as the center, and the points are set so as to pass slightly outside the points E and F and inside the point G.

In this case, the shaded area in the vicinity of the point G shown in FIG. 13 deviates outside the locus. Therefore, when the sawtooth grid plate 41 is circularly moved, points E and F are obtained.
Touches a solid object (not shown) placed near the point G. Therefore, when the saw-toothed grating plate 41 is lowered, the solid object in the area is pressed downward by the step surface 41B. As a result, it becomes impossible to transfer the solid matter in the area upward.

The present invention solves the above-mentioned problems of the conventional staircase type filtering machine, can increase the installation angle, and can reliably transfer solid objects upward. It is intended to provide a lattice plate.

[0019]

To this end, the saw-toothed lattice plate of the step type filter of the present invention is made of a long plate material. Further, it has a plurality of staircase surfaces and a step surface having a concave shape that connects the respective staircase surfaces. Further, each of the stair surfaces is formed by inclining downward at a predetermined angle toward the flow direction of the wastewater in a state where the installation angle of the sawtooth grid plate is set to 45 [°] or more.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an enlarged view showing a main part of a movable lattice plate according to an embodiment of the present invention, FIG. 14 is a perspective view showing an arrangement state of a step filter according to the embodiment of the present invention, and FIG.
FIG. 3 is a side view of the movable grid plate in the embodiment of the present invention.

In the figure, 10 is a movable lattice part, 20 is a fixed lattice part, 300 is an elliptical drive mechanism as a driving means, 40 is a filter frame, and the movable lattice part 1 is
0, the fixed grid portion 20, the elliptical drive mechanism 300, the filter frame 40, and the like constitute a step-type filter that is arranged to be inclined with respect to the water channel.

The fixed grid portion 20 is a fixed grid plate 2 as a plurality of fixed sawtooth grid plates made of a long plate material.
It is formed by fixing 00 to the fixed frame F. In addition, the movable grid portion 10 is made of a long plate material, and has the same shape and size as the fixed grid plate 200. The movable grid plate 100 is a plurality of movable sawtooth grid plates.
Is fixed to a moving frame (not shown). The movable lattice plate 100 and the fixed lattice plate 200 are alternately arranged, and the movable lattice plate 100 is
It is inserted between each adjacent fixed lattice plate 200.

The elliptical drive mechanism 300 includes a motor, a speed reducer, and a motion mechanism (not shown). The motor is driven, the generated rotation is reduced by the speed reducer, and the movable grid unit 10 is moved through the motion mechanism. Upon transmission, the movable lattice part 10 is caused to move in an elliptical manner.

The movable grid plate 100 has a plurality of stair surfaces 100 which are formed by inclining downward at a predetermined angle in the flow direction of the wastewater (leftward in FIGS. 1 and 15).
A and a step surface 100B having a concave shape that connects the stair surfaces 100A.

Further, the fixed grid plate 200 connects a plurality of stair surfaces 200A formed by inclining downward at a predetermined angle in the flow direction of the wastewater, and connecting the respective stair surfaces 200A to form a concave shape. And a stepped surface 200B having.

The alternate long and short dash line is the locus Y of the elliptic movement of the movable lattice portion 10, and the locus Y is represented by an ellipse. The concave surfaces of the step surfaces 100B and 200B are curved along the locus Y.

Then, as the movable grid portion 10 is caused to make an elliptical motion along the locus Y in the direction of the arrow, the movable grid portion 10 lifts a solid object (not shown) on each stair surface 200A to move it upward. Place it on the stairs surface 200A. In this way, the step-type filter collects solid substances such as contaminants flowing on the surface of the waste water or the waste water and discharges them to the outside of the water channel.

In this case, the points of the adjacent peaks in each movable grid plate 100 and fixed grid plate 200 are designated as K and L,
When the point of the valley part sandwiched between adjacent mountain parts is M,
The locus Y is set so as to pass slightly outside the points K to M around the center point P of the points K and L on the movable lattice plate 100.

Therefore, since the locus Y passes slightly outside the point L, it is possible to place a solid object on the stepped surface 200A above the fixed grid plate 200 a little inside in a stable manner.
Further, since the locus Y passes slightly outside the point M, the points K and L of the movable lattice plate 100 do not touch a solid object placed near the point M of the fixed lattice plate 200. Therefore,
The solid object in the area near the point M is not pushed downward by the step surface 100B. As a result, the solid matter can be surely moved upward.

Further, since the step surfaces 100B and 200B have a concave shape, the step surfaces 100A and the step surfaces 2 are formed.
It is possible to sufficiently secure the space formed between 00A and storing the solid matter. Therefore, it is possible to collect solid substances such as impurities flowing on the surface of the waste water or the waste water sufficiently and stably, and discharge the solid substances to the outside of the water channel.

Then, even if the installation angle of the stair type filter is increased to 45 [°] or more, for example, near 90 [°], the stair surfaces 100A and 200A face downward in the flow direction of the wastewater. Since it is formed by inclining at a predetermined angle,
The solid matter is reliably transferred upward without being interfered by the corners (points K and L) of the movable lattice plate 100. Therefore, even if the water channel becomes deep, the movable grid plate 10
Since it is not necessary to lengthen the 0 and the fixed grid plate 200, the size of the step filter can be reduced, and
The step type filter can be structurally stabilized. Therefore, for example, even if the depth of the water channel is 2.7 [m] or more, the step type filter can be designed.

Further, it is possible to adjust the angle of the locus Y by the elliptical motion mechanism 300 and the installation angle of the staircase type filter in accordance with the depth of the water channel.

The present invention is not limited to the above-mentioned embodiments, but can be variously modified within the scope of the present invention, and they are not excluded from the scope of the present invention.

[0035]

As described in detail above, according to the present invention, the saw-toothed lattice plate of the step type filter is made of an elongated plate material. Further, it has a plurality of staircase surfaces and a step surface having a concave shape that connects the respective staircase surfaces. In addition, the installation angle of the saw-toothed lattice plate is 45 for each of the stair surfaces
[°] or more, in the direction of wastewater flow,
It is formed by inclining downward at a predetermined angle.

In this case, each step surface is formed by inclining downward at a predetermined angle toward the flow direction of the waste water in a state where the installation angle of the sawtooth grid plate is set to 45 ° or more. Therefore, the solid matter on the staircase surface can be reliably transferred upward without being interfered by the corners of the saw-toothed grating plate on the movable side. Therefore, even if the water channel becomes deep, the size of the step filter can be reduced and the step filter can be structurally stabilized. As a result, for example, even if the depth of the water channel is 2.7 [m] or more, the step type filter can be designed.

Further, since the step surfaces having a concave shape are formed by connecting the respective step surfaces, it is possible to stably place the solid object on the step surface of the sawtooth type lattice plate on the fixed side. You can

Then, a space formed between the stair surfaces to store solid objects can be sufficiently secured. Therefore, it is possible to collect solid substances such as impurities flowing on the surface of the waste water or the waste water sufficiently and stably, and discharge the solid substances to the outside of the water channel.

[Brief description of drawings]

FIG. 1 is an enlarged view showing a main part of a movable lattice plate according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an arrangement state of a conventional stair type filtration machine.

FIG. 3 is a side sectional view of a conventional step filter.

FIG. 4 is a side view of a movable lattice plate in a conventional stair type filtration machine.

FIG. 5 is an enlarged view showing a main part of a movable lattice plate in a conventional staircase type filtering machine.

FIG. 6 is a first side view showing a transfer state of solid matter in a conventional step type filter.

FIG. 7 is a first perspective view showing a transfer state of solid matter in a conventional step type filter.

FIG. 8 is a second side view showing a transfer state of solid matter in the conventional step-type filter.

FIG. 9 is a second perspective view showing a transfer state of solid matter in the conventional step-type filter.

FIG. 10 is a third side view showing a transfer state of solid matter in the conventional step-type filter.

FIG. 11 is a third perspective view showing a transfer state of solid matter in the conventional staircase type filtering machine.

FIG. 12 is a diagram showing a first improvement example of a conventional step-type filter.

FIG. 13 is a diagram showing a second improved example of the conventional step-type filter.

FIG. 14 is a perspective view showing an arrangement state of a step type filter in the embodiment of the present invention.

FIG. 15 is a side view of the movable grid plate according to the embodiment of the present invention.

[Explanation of symbols]

100 movable grid plate 100A, 200A stairs 100B, 200B step surface 200 fixed grid plate

Front page continuation (51) Int.Cl. ⁷ identification code FI E03F 5/14 B01D 29/42 520 (58) Fields investigated (Int.Cl. ⁷ , DB name) B01D 29/01 E02B 5/08

Claims (2)

(57) [Claims] 1. A saw toothed grating plate of stepped filtration device consisting of an elongated plate member has a multiple stepped face, the (b) connecting between respective stepped surface, a concave shape (a) and having a stepped surface, the (c) each of said stepped surface, the installation angle of the saw toothed grating plate 45
[°] or more, in the direction of wastewater flow,
A saw-tooth grid plate for a step type filter, which is formed by inclining downward at a predetermined angle . 2. A center point of the points of adjacent mountain portions
A valley part where the locus of the elliptical motion is sandwiched between adjacent mountain parts.
The floor according to claim 1, which is set to pass outside the point of
Saw-toothed grid plate for a stage filter.