JP2002102612A - Saw-toothed lattice plate of stepped filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a saw-toothed lattice plate of a stepped filter, capable of being increased in its installation angle and capable of certainly transferring a solid upwardly. SOLUTION: The saw-toothed lattice plate comprising a long plate material has a plurality of step surfaces 100A and 200A formed so as to be downwardly inclined at a predetermined angle in a wastewater flow direction and stepped surfaces 100B and 200B connecting the respective step surfaces 100A and 200A and having recessed surface shapes. Since a plurality of the step surfaces 100A and 200A formed so as to be downwardly inclined at the predetermined angle in the wastewater flow direction, even if the installation angle of a stepped filter is made large, the solid on the fixed step surface 200A is certainly transferred upwardly without being interfered with the corner of the saw-toothed lattice plate on a movable side. Even if a water channel becomes deep, the dimension of the stepped filter can be reduced and the stepped filter can be structurally stabilized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, a step-type filter has been provided in a waterway such as a sewage channel so as to be inclined with respect to the waterway to remove solid matter such as the surface of wastewater or foreign matters flowing through the wastewater. They are collected and discharged outside the waterways.

FIG. 2 is a perspective view showing an arrangement of a conventional step-type filter, FIG. 3 is a side sectional view of the conventional step-type filter, and FIG.
FIG. 5 is a side view of a movable grid plate in the conventional step filter, FIG. 5 is an enlarged view showing a main part of the movable grid plate in the conventional step filter, and FIG. 6 is a solid matter transfer in the conventional step filter. FIG. 7 is a first perspective view showing a state of transferring solids in a conventional step-type filter, and FIG.
FIG. 9 is a second side view showing a state of transferring solids in a conventional step-type filter, FIG. 9 is a second perspective view showing a state of transfer of solids in a conventional step-type filter, and FIG. FIG. 11 is a third perspective view showing a transfer state of solid matter in a conventional step filter, and FIG. 12 is a third perspective view showing a transfer state of solid matter in a 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 a conventional step filter.

In the drawing, reference numeral 10 denotes a movable grid portion, 20 denotes a fixed grid portion, 30 denotes a driving mechanism, and 40 denotes a filter frame. The movable grid portion 10, the fixed grid portion 20, and the driving mechanism 3
0, the filter frame 40 and the like constitute a step-type filter disposed 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. Each fixed grid plate 21 is processed into a right-angled step shape. It has a stair surface 21A. The movable grid portion 10 is made of a long plate material, and the fixed grid plate 2
The movable grid plate 11 is formed by fixing a plurality of movable grid plates 11 having the same shape and dimensions to the movable frame R, and each movable grid plate 11 is processed into a right-angled step shape, and a step surface 11 is formed.
A and a step surface 11B. The movable lattice plates 11 and the fixed lattice plates 21 are arranged alternately, and the movable lattice plates 11 are inserted between adjacent fixed lattice plates 21 respectively.

The drive mechanism 30 includes a motor 3A, a speed reducer 3B, and a motion mechanism 3C. The drive mechanism 30 drives the motor 3A to reduce the generated rotation by the speed reducer 3B. When transmitted to the movable grid 10, the movable grid 10 is moved circularly.

In FIGS. 4 and 5, a broken line indicates
The trajectory Q of the circular movement of the movable lattice unit 10 is represented by a perfect circle. Then, as the movable grid portion 10 is made to circularly move in the direction of the arrow along the trajectory Q, the movable grid portion 10 lifts the solid object S on each step surface 21A of the fixed grid plate 21, and It is placed on the upper stair surface 21A. In this manner, the step-type filter collects the solids S such as impurities on the surface of the wastewater or in the wastewater and discharges the solids S to the outside of the waterway.

In this case, when the points of adjacent peaks in the movable grid plate 11 and the fixed grid plate 21 are A and B, and the point of a valley between adjacent peaks is C, the trajectory Q is Are set so as to pass slightly outside the points A to C around the center point P between the points A and B on the movable lattice plate 11. Therefore, since the trajectory Q passes slightly outside the point B, the solid object S is moved to the stepped surface 2 on the fixed grid plate 21.
It can be stably placed slightly inside on 1A. Also, since the trajectory passes slightly outside the point C, the points A and B on the movable grid plate 11
Does not touch the solid object S placed in the vicinity of.

As described above, the movable grating portion 20 is moved in a circular motion, and the movable grating portion 20 is moved 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. By repeating the cycle described above, the solid objects S on each step surface 21A are placed on the upper step surface 21A one by one and transferred upward. Then, the solid matter S transferred to the uppermost stair surface 21A is discharged to the outside of the water channel via a conveyor (not shown).

[0010]

However, in the above-mentioned conventional step filter, since the movable grid plate 11 and the fixed grid plate 21 are formed in the shape of a right-angled step, the solid material S
In order to stably transfer the stairs 11A and 21A to the front side (right side in FIG. 5) without slipping, the step surfaces 11A and 21A need to be horizontal. As a result, the inclination of the movable grid plate 11 and the fixed grid plate 21 That is, it is necessary to set the installation angle of the step filter to 45 °.

In recent years, in urban sewage treatment facilities, the depth of waterways has been set to 2.5 to 7 [m] in consideration of periods of high rainfall and periods when floods are likely to occur. There are many. However, the installation angle of the stair filter was 45
[°], when the channel becomes deeper, the movable grid plate 11
In addition, since the length of the fixed grid plate 21 is increased by that amount, the dimensions of the step-type filter are increased, and the step-type filter is structurally unstable. Therefore, for example, when the depth of the water channel is 2.7 [m] or more, it becomes impossible to design a step-type filter.

Therefore, as shown in a first improvement example shown in FIG. 12, the installation angle of the step-type filter is increased, for example,
It can be considered to be 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. The step-type filter can be structurally stabilized.

[0013] However, the installation angle of the step type filter is set to 75.
When set to [°], each of the step surfaces 11A and 21A is inclined obliquely downward toward the direction opposite to the flow direction of the wastewater (the left direction in FIG. 12), and the solid matter S moves toward the near side (the right side in FIG. 12). I slip down.

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

In FIG. 13, reference numeral 41 denotes a sawtooth grid plate (movable grid plate and fixed grid plate).
Are formed so as to be inclined inward (left side in the drawing) from a plurality of stair surfaces 41A and a front end portion of the stair surfaces 41A, and a step connecting the respective stair surfaces 41A is formed. The surface 41B is provided.

The installation angle of the step filter provided with the saw-toothed lattice plate 41 is increased (for example, 75 °).
Then, the trajectory of the circular motion of the sawtooth-shaped lattice plate 41 indicated by the broken line is such that the points of adjacent peaks in the sawtooth-shaped lattice plate 41 are E and F, and the point of a valley portion sandwiched between the peaks is G
Is set so as to pass slightly outside the points E and F and inside the point G around the center point P between the points E and F.

In this case, the hatched area near the point G shown in FIG. 13 deviates outside the locus, so that when the saw-tooth type lattice plate 41 is circularly moved, the points E and F
Touches a solid object (not shown) placed near the point G. Therefore, when the saw-tooth type lattice plate 41 is lowered, the solid object in the region is pressed downward by the step surface 41B. As a result, the solid matter in the area cannot be transferred upward.

The present invention solves the above-mentioned problems of the conventional step-type filter, and makes it possible to increase the installation angle and to surely transfer solids upward. It is an object to provide a lattice plate.

[0019]

For this purpose, in the saw-toothed grid plate of the step filter according to the present invention, the saw-toothed grid plate of the step filter made of a long plate material is arranged in the flow direction of the wastewater. There are a plurality of step surfaces formed to be inclined downward at a predetermined angle toward the bottom, and a step surface having a concave shape connecting the respective step surfaces.

[0020]

Embodiments of the present invention will be described below 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-type filter according to an embodiment of the present invention, and FIG.
FIG. 2 is a side view of the movable grid plate according to the embodiment of the present invention.

In the drawing, reference numeral 10 denotes a movable grid portion, 20 denotes a fixed grid portion, 300 denotes an elliptical drive mechanism as a driving means, 40 denotes a filter frame, and the movable grid portion 1
The staircase-type filter disposed so as to be inclined with respect to the water channel is constituted by the 0, the fixed grid portion 20, the elliptical drive mechanism 300, the filter frame 40 and the like.

The fixed grid portion 20 is a fixed grid plate 2 as a plurality of fixed-side saw-tooth grid plates made of a long plate material.
00 is fixed to the fixing frame F. The movable grid portion 10 is formed of a long plate material, and has a plurality of movable saw-toothed grid plates having the same shape and dimensions as the fixed grid plate 200.
Is fixed to a moving frame (not shown). The movable grid plate 100 and the fixed grid plate 200 are alternately arranged, and the movable grid plate 100 is
It is inserted between each adjacent fixed grid plate 200.

The elliptical drive mechanism 300 includes a motor, a speed reducer, and a motion mechanism (not shown). The motor is driven to reduce the generated rotation by the speed reducer. Upon transmission, the movable lattice portion 10 is moved in an elliptical manner.

The movable lattice plate 100 has a plurality of step surfaces 100 formed to be inclined downward at a predetermined angle in the flow direction of the waste water (left direction in FIGS. 1 and 15).
A, and a step surface 100B that connects the step surfaces 100A and has a concave shape.

The fixed grid plate 200 has a plurality of stepped surfaces 200A formed by inclining downward at a predetermined angle in the flow direction of the wastewater, and connects between the stepped surfaces 200A to form a concave shape. Is formed of the stepped surface 200B.

The dashed line is the trajectory Y of the elliptical motion of the movable grating section 10, and the trajectory Y is represented by an ellipse. The concave surfaces of the step surfaces 100B and 200B are formed by bending along the locus Y.

Then, as the movable grid portion 10 is moved elliptically in the direction of the arrow along the trajectory Y, the movable grid portion 10 lifts a solid object (not shown) on each step surface 200A, and raises the solid object by one. Place on staircase 200A. In this way, the step-type filter collects solids such as contaminants flowing on the surface of the wastewater or the wastewater and discharges them to the outside of the waterway.

In this case, the points of adjacent ridges on each movable grid plate 100 and fixed grid plate 200 are K and L,
When a point of a valley portion sandwiched between adjacent mountain portions is M,
The trajectory 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 trajectory Y passes slightly outside the point L, the solid object can be stably placed slightly inside the stepped surface 200A on the fixed grid plate 200.
Further, since the trajectory Y passes slightly outside the point M, the points K and L of the movable grid plate 100 do not touch a solid object placed near the point M of the fixed grid 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 object can be reliably moved upward.

Since the step surfaces 100B and 200B have a concave shape, each step surface 100A and each step surface 2A have a concave shape.
A space formed between 00A and accommodating a solid object can be sufficiently secured. Therefore, solid substances such as contaminants flowing on the surface of the wastewater or in the wastewater can be sufficiently and stably collected and discharged to the outside of the water channel.

When the installation angle of the step-type filter is increased to 45 ° or more, for example, even close to 90 °, the step surfaces 100A and 200A face downward in the flow direction of the wastewater. Since it is formed to be inclined at a predetermined angle,
The solid object is reliably transported upward without interference by the corners (points K and L) of the movable grid plate 100. Therefore, even if the channel becomes deep, the movable grid plate 10
Since there is no need to lengthen the zero and fixed grid plate 200, the size of the step filter can be reduced,
The step-type filter can be structurally stabilized. Therefore, for example, even if the depth of the water channel becomes 2.7 [m] or more, a step-type filter can be designed.

Further, it is possible to adjust the angle of the trajectory Y by the elliptical motion mechanism 300 or the installation angle of the step filter in accordance with the depth of the water channel.

It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified based on the gist of the present invention, and they are not excluded from the scope of the present invention.

[0035]

As described above in detail, according to the present invention, in the saw-toothed lattice plate of the step-type filter, the saw-toothed lattice plate of the step-type filter made of a long plate material is provided.
It has a plurality of step surfaces formed to be inclined downward at a predetermined angle in the flow direction of the wastewater, and a step surface having a concave shape connecting the respective step surfaces.

In this case, since there are a plurality of step surfaces formed to be inclined downward at a predetermined angle toward the flow direction of the wastewater, even if the installation angle of the step filter is increased,
The solid object on the step surface is surely transported upward without being interfered by the corners of the sawtooth lattice 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 becomes 2.7 [m] or more, it is possible to design a step-type filter.

Further, since a step surface having a concave shape is formed by connecting the respective step surfaces, it is possible to stably place the solid object slightly inside on the step surface of the fixed saw-tooth lattice plate. Can be.

[0038] A space formed between the step surfaces and accommodating the solid object can be sufficiently ensured. Therefore, solid substances such as contaminants flowing on the surface of the wastewater or in the wastewater can be sufficiently and stably collected and discharged to the outside of the water channel.

[Brief description of 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. 2 is a perspective view showing an arrangement state of a conventional step-type filter.

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

FIG. 4 is a side view of a movable lattice plate in a conventional step filter.

FIG. 5 is an enlarged view showing a main part of a movable lattice plate in a conventional step-type filter.

FIG. 6 is a first side view showing a state of transferring solids in a conventional step 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 state of transferring solids in the conventional step filter.

FIG. 9 is a second perspective view showing a state of transferring solids in the conventional step filter.

FIG. 10 is a third side view showing a state in which solid matter is transferred in a conventional step-type filter.

FIG. 11 is a third perspective view showing a state of transferring solids in a conventional step-type filter.

FIG. 12 is a diagram showing a first improved example of a conventional step filter.

FIG. 13 is a view showing a second improved example of the conventional step filter.

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

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

[Explanation of symbols]

 Reference Signs List 100 movable grid plate 100A, 200A stepped surface 100B, 200B stepped surface 200 fixed grid plate

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) E03F 5/14 B01D 29/42 520

Claims (1)

[Claims] 1. A saw-toothed lattice plate of a step filter comprising a long plate material, wherein (a) in the direction of flow of wastewater,
A staircase filter characterized by having a plurality of stairways formed inclined downward at a predetermined angle, and (b) a step surface having a concave shape connecting between the respective stairways. Sawtooth type lattice plate.