JPH119906A - Tilting plate device - Google Patents

Abstract

(57) [Problem] To provide an inclined plate device 1 installed in a sedimentation basin 21 that can be easily and quickly installed in the sedimentation basin 21,
In addition, it prevents the inclined plate 7 from falling off or being damaged during water injection or drainage. SOLUTION: A plurality of inclined plates 7 are held in a frame 2 to constitute an inclined plate device 1 and can be mounted in a settling tank 21 in a unit shape. The inclined plate 7 is made of plastic,
It is formed in a waveform in the width direction. The frame 2 is
A plastic pipe member 3 is connected by a plastic joint 4 and includes a pair of parallelogram-shaped side frames 5 and 5 and a connection frame 6. It is inclined parallel to the side. The side frame 5 is provided with auxiliary frames 9 and 10, and the connecting frame 6 is provided with an auxiliary frame 11. The auxiliary frame 11 and the upper and lower sides of the side frame 5 have one inclined plate 7. Six holders 13 are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inclined plate device which is disposed in a sedimentation pond of a water purification plant, a sewage treatment plant or the like, and which sediments sludge particles and the like from treated water.

[0002]

2. Description of the Related Art As an inclined plate device of this kind, there is known an inclined plate device described in, for example, Japanese Patent Application Laid-Open No. Sho 60-166011. In the inclined plate device described in this publication, a plurality of angled plate-shaped inclined plates are stacked at appropriate intervals in an inverted V shape, and a plurality of shielding plates are provided on side portions of the inclined plate. The inclined plate device thus constructed is suspended from a suspension member passed to a sedimentation basin such as a water purification plant or a sewage treatment plant, installed in the sedimentation basin, and supplied to the sedimentation basin. The sludge particles are settled and separated from the suspended suspension by the inclined plate, and the separated sludge is gently settled at the bottom of the pond through the space between the shield plates.

[0003]

The work of installing such a sloping plate apparatus in a sedimentation basin is conventionally performed by attaching a single sloping plate or shielding plate to the hanging member at a work site having a sedimentation basin. However, there is a problem that the installation requires a lot of time and labor. Furthermore, these inclined plates and shielding plates are only supported in the sedimentation basin in a state of being suspended from the suspension member, and the water injection speed at the time of pouring water into the sedimentation basin and the drainage speed at the time of drainage are too fast. In such a case, the inclined plate or the shield plate may be detached from the suspension member due to the strong water flow. In addition, although the suspended weight of the inclined plate is reduced by buoyancy when it is immersed in the suspension, when the suspension is drained from the sedimentation tank, it attaches in addition to its own weight. Since the weight of the sludge thus produced acts as it is, there is a possibility that the suspended member may not be able to withstand the weight and may be damaged, or the inclined plate itself may be damaged.

The present invention has been made under such a background, and in the inclined plate device installed in the above-described sedimentation basin, installation in the sedimentation basin can be performed easily and in a short time. It is another object of the present invention to provide an inclined plate device capable of preventing the inclined plate from falling off or being damaged during water injection or drainage.

[0005]

In order to solve the above-mentioned problems and to achieve the above object, an inclined plate apparatus of the present invention is configured by holding a plurality of inclined plates in a frame, and is provided in a sedimentation tank. It can be placed in a unit shape. Therefore, the above-mentioned inclined plate is held by the frame, thereby improving the mounting strength of the inclined plate, thereby preventing the inclined plate from falling off or being damaged. By arranging them one after another or by stacking them three-dimensionally, the work on site can be greatly simplified, and the time and labor required for installing the inclined plate can be reduced.

Here, if the inclined plate is formed in a corrugated shape in the width direction, the area of the inclined plate can be increased and the efficiency of separating sludge particles can be further improved. In addition, regarding the above-mentioned frame body, this is to be constituted by connecting pipe materials,
It is desirable to provide a pair of square side frames and a connecting frame connecting the corresponding corners of these side frames, whereby the unitized inclined plate device is densely arranged in the sedimentation basin. As a result, the sedimentation and separation of the sludge particles can be more reliably achieved, and the strength of the frame can be sufficiently ensured. Furthermore, when such a configuration is adopted, the connection frame includes an auxiliary frame that connects the central portions of the connection frames to upper and lower sides of a square formed by the side frames in parallel,
By providing each of the auxiliary frame and the upper and lower sides of the side frame with six holders that bite and fix the inclined plate with respect to one inclined plate, the frame body strength can be further improved. Thus, the inclined plate can be securely and stably held for a long period of time.

Further, in order to prevent rust and reduce weight, it is desirable that the inclined plate is made of plastic. Furthermore, if the above-mentioned frame is constituted by connecting a plastic pipe material with a plastic joint, it is possible to ensure rust prevention for the entire inclined plate device and to further reduce the weight. This makes it possible to provide an inclined plate device which is extremely easy to handle.

[0008]

1 to 4 show an inclined plate device 1 according to an embodiment of the present invention. In the inclined plate device 1 of the present embodiment, the frame body 2 is configured by connecting pipe members 3 by joints 4, and these pipe members 3 are combined into a horizontally long parallelogram. Side frames 5, 5 and a connecting frame 6 for connecting four mutually corresponding corners of the parallelogram formed by these side frames 5, 5 with a pipe member 3 in a direction perpendicular to the parallelogram. And a large number of inclined plates 7 are held in the frame 1. In the present embodiment, the size of the frame 2 is such that its width W, that is, the length in the extending direction of the connection frame 6 is about 1 to 1.5 m, and its height H, that is, The height of the parallelogram formed by the frame 5 is 1 to 1.
5 m, and the distance between the parallel corners of the parallelogram formed by the side frame 5 in the direction perpendicular to the length L, that is, the direction of the height H, is 2 to 2.5 m. Range.

Here, in the inclined plate device 1 of the present embodiment, the frame 2 is mounted on the sedimentation basin with the long sides of the four sides of the parallelogram formed by the side frames 5 and 5 up and down respectively. The mounting surface 8 is a rectangular surface (lower surface) defined by the lower sides of the side frames 5, 5 and a pair of connecting frames 6, 6 connecting the corners at both ends of the lower sides. You. Accordingly, two short sides of the parallelogram formed by the side frames 5 are inclined sides inclined with respect to the mounting surface 8, and the inclination angle α is set in the range of 50 ° to 60 ° in the present embodiment. ing. The inclined plates 7 are attached in a direction parallel to the inclined sides of the side frame 5 and perpendicular to the parallelogram formed by the side frames 5, and are arranged in parallel along the upper and lower sides of the parallelogram. It is arranged in. Accordingly, these inclined plates 7 are also arranged with respect to the mounting surface 8 at an inclination angle α equal to the inclined side.

In the present embodiment, the inclined plate 7 is made of plastic, and the upper and lower sides of the parallelogram formed by the side frames 5 are oriented in the width direction, that is, in the direction along the connecting frame 6. It is formed in a corrugated plate shape that is uneven in the extending direction. In the present embodiment, the waveform formed by the inclined plate 7 is one side in the direction in which the upper and lower sides extend between one side frame 5 and the other side frame 5 along the connection frame 6. The period from the most protruding position (left side in FIGS. 2 and 3) to the most protruding position via the most retreated position and the most protruding position again is formed so as to have an amplitude corresponding to two periods while being curved in a substantially uneven arc shape. . Further, the inclined plates 7 are formed to have substantially the same shape as each other, and are arranged at equal intervals along the upper and lower sides. In the present embodiment,
The pipe member 3 and the joints 4 are also made of plastic, and the joint 4 is manufactured by injection molding and has a shape obtained by appropriately combining a plurality of cylinders. The pipe members 3 are connected by fitting.

On the other hand, a pipe member 3 is attached to the side frame 5 by joints 4 and 4 so as to connect the center of the upper and lower sides of the parallelogram formed by the side frame 5 to form an auxiliary frame 9. And these joints 4,4
And the joint 4, which is located at the obtuse angle of the parallelogram
Auxiliary frames 10 and 10 are formed by attaching pipe members 3 and 3 so as to connect them to the frame 4. Therefore, in the present embodiment, these auxiliary frames 9, 10, 10 have a "W" shape together with the other inclined side (the right inclined side in FIG. 2) of the side frame 5 as shown in FIG. The side frames 5 and the auxiliary frames 9, 10, 10 have a truss structure.

The connecting frames 6 are provided with the side frames 5,
The center portions of the connection frames 6 and 6 connecting the corners at both ends of the upper side and the center portions of the connection frames 6 and 6 connecting the corners at both ends of the lower side are respectively connected to the upper and lower sides of the side frames 5 and 5. A pipe member 3 is attached by a joint 4 so as to be connected to the side in parallel, and thereby auxiliary frames 11 and 11 are formed on the upper surface of the frame 2 and the mounting surface 8 described above. Further, on the upper surface and the mounting surface 8 of the frame 2, the auxiliary frame is connected so that the central portions of the upper sides and the central portions of the lower sides of the side frames 5 and 5 are connected in parallel to the connecting frames 6. The pipe members 3 are attached to joints 4 for attaching the 9, 9 to the side frames 5, and auxiliary frames 12, 12 are formed. The auxiliary frames 12, 12 and the auxiliary frame 1
The upper and lower surfaces of the frame 2 and the mounting surface 8 are connected to each other at right angles through a cross-shaped joint 4.

The upper and lower sides of the side frames 5, 5 and the auxiliary frames 11, 11, which are parallel to the upper and lower sides, are provided with the same number of holders 13 as the inclined plates 7, respectively. A total of six holders are provided at equal intervals along the sides and the direction in which the auxiliary frame 11 extends, and one each of the upper and lower sides of the side frames 5 and 5 and one attached to the auxiliary frame 11. 13 are adapted to hold one inclined plate 7. Here, these holders 13 are inclined in accordance with the inclination angle α.
The inclined plate 7 is fixed by inserting the edge of the inclined plate 7 between the comb plates. Since the inclined plate 7 is formed into a waveform that is curved by two periods as described above,
The inclined plate 7 has upper and lower portions at positions most protruding on one side (the left side in FIGS. 2 and 3) in the direction in which the upper and lower sides of the side frame 5 extend, that is, upper and lower portions at both end positions in the width direction and a central position. Are fixed by the above-mentioned six holders 13 and are held in the frame 2.

In the inclined plate device 1 of the present embodiment configured as described above, the above-mentioned frame 2 forms one unit, and the inclined plate device 1 forming such a unit is used for water purification as shown in FIG. A large number of them are placed in a sedimentation basin 21 of a sewage treatment plant or a sewage treatment plant and used for sedimentation and separation of sludge particles. Here, in the sedimentation basin 21 shown in FIG.
A large number of beams 23 are passed about above, and the inclined plate devices 1 are stacked and mounted in two stages on the beams 23 over the width direction and the longitudinal direction of the sedimentation basin 21. And
In these inclined plate devices 1 and 1 stacked in two stages, the directions of the inclined plates 7 are opposite to each other. A rail 24 is laid on the bottom 22 of the sedimentation basin 21 along its longitudinal direction, and a sludge scraping device 25 is provided on the rail 24 so as to be able to run along the rail 24. The beams 2 are settled and separated by the inclined plate devices 1.
3. Sludge settled on the bottom 22 of the pond is raked from the gap between the two and discharged to a sludge pit 26 provided at one end of the bottom 22 of the pond. A baffle 27 is provided between the beams 23 adjacent to each other in the longitudinal direction of the sedimentation basin 21 to prevent a short-circuit flow of the water to be treated.

As described above, in the inclined plate device 1 having the above-described structure, the plurality of inclined plates 7 are held in the frame 2 to form a unit as described above.
1, the inclined plate 7...
It is only necessary to place it inside the workplace.For example, it is possible to greatly reduce the time and labor required for installation as compared with the case where the inclined plate is attached to the suspending member one by one and suspended at the work site as in the conventional case. It becomes possible. Further, even when the inclined plate devices 1 are installed in the sedimentation basins 21 having different sizes, it is possible to cope by changing the number of units of the inclined plate devices 1 to be mounted. The present invention can be applied to the sedimentation basins 21 of various sizes, and the advantage of high versatility can be obtained. Further, since the inclined plates 7 are held by the frame body 2 as described above, the inclined plate device 1 is provided as described above.
Are stacked and installed in the sedimentation basin 21, the weight of the upper inclined plate device 1 is received by the frame 2 of the lower inclined plate device 1 and does not reach the inclined plates 7. It is possible to stack the inclined plate devices 1 in multiple stages according to the depth of the sedimentation basin 21, and it is possible to more reliably settle and separate the water to be treated supplied to the sedimentation basin 21.

In addition, the inclined plate device 1 is unitized in this way, and the inclined plate 7 is held by the frame 2 in each unit, so that the inclined plate is simply suspended by the suspension member and held as in the conventional case. As compared with the case, the mounting strength of the inclined plate 7 can be improved, and even if a strong water flow occurs when pouring or draining the sedimentation basin 21, the inclined plate 7 is prevented from coming off and falling off. It becomes possible. Moreover, even when the weight of the sludge attached to the inclined plate 7 in addition to its own weight acts on the inclined plate 7 during draining, the inclined plate 7 may be damaged due to the high mounting strength of the inclined plate 7. And the weight of the slanted plates 7 and the sludge are dispersed and received by the frame 2, so that the slanted plate device 1 itself is damaged as compared with the conventional slanted plate device in which the weight is concentrated on the suspension member. Can be prevented. Therefore, according to the above-mentioned inclined plate device 1, not only the installation work to the sedimentation basin 21 can be simplified, but also the sedimentation basin 2 for treating raw water having high turbidity.
Even in the case of the use of 1, the repair work due to such falling, breakage and damage of the inclined plate 7 can be reduced, and it is possible to promote stable settling of the water to be treated over a long period of time.

By the way, in the inclined plate device 1 of the present embodiment, the inclination angle α of the inclined plate 7 with respect to the mounting surface 8 on the frame 2 is set in the range of 50 ° to 60 °. If the inclination is gentler as the angle α falls below 50 °, the sludge particles that have settled and separated and adhered to the inclined plate 7 are less likely to slide down along the inclined plate 7 and are deposited as they are,
There is a possibility that the separation between the adjacent sludge plates 7 and 7 may be hindered, and the subsequent separation of sludge may be hindered. On the other hand, if the inclination of the inclined plate 7 is steeper as the inclination angle α exceeds 60 °,
Conversely, the sludge particles hardly adhere to the inclined plate 7, but the effective projection area of the inclined plate 7 in the settling direction of the sludge particles becomes extremely small, and the performance of the sedimentation basin 21 may be impaired. Therefore, in the present embodiment, the inclination angle α is set to 50 ° to 60 °.
Thus, it is possible to promote rapid sedimentation while maintaining the sludge separation efficiency.

In this embodiment, the inclined plate 7 is
It is formed so as to form a waveform in the width direction,
As compared with the case where a flat inclined plate is used, the area can be increased and the separation efficiency of sludge particles can be further improved. In addition, in the present embodiment, since the waveform formed by the inclined plate 7 is formed so as to have a substantially circular arc shape and is uneven, a portion that is angular or narrow on the inclined plate 7 is formed. Therefore, it is possible to prevent a situation in which the sludge particles are concentrated on such a portion and the waveform shape is impaired. Further, in the present embodiment, the plurality of inclined plates 7 held by the frame 2 are arranged at equal intervals, so that each inclined plate 7 can promote uniform settling and separation of sludge. It is also possible to prevent a situation in which the gap between the narrow inclined plates 7, 7 is blocked by sludge particles attached to the slanted plates 7 and 7 and clogging, thereby hindering sedimentation and separation of sludge.

On the other hand, in the inclined plate device 1 of the present embodiment, the frame 2 is formed by connecting the pipe members 3 with the joints 4, and the frame 2 is formed of a pair of parallelogram-shaped side frames. 5, 5 and a connecting frame 6 for connecting them, an outer shape is formed, and the inclined side of this parallelogram is inclined at an inclination angle α equal to the inclined plate 7 with respect to the mounting surface 8 described above. , That is, the inclined plates 7 are inclined in parallel with the inclined sides of the side frame 5. Therefore, the plurality of inclined plate devices 1
Are placed in the sedimentation basin 21 in a unit shape, as shown in FIG. 5, the inclined plate devices 1 are moved in the direction in which the upper and lower sides of the side Can be densely arranged in the sedimentation basin 21, and the interval between the mutually facing inclined plates 7, 7 of the adjacent inclined plate devices 1, 1 can be arranged. Can be prevented from becoming too large.
It is possible to surely settle and separate sludge evenly over the entirety of 1.

In this embodiment, the side frame 5 has an auxiliary frame 9 for connecting the central portions of the upper and lower sides of the parallelogram formed by the side frame 5 to each other. An auxiliary frame 10 is provided to connect the obtuse corners of the shape, and the side frame 5 has a truss structure as described above, so that the strength of the frame body 2 particularly against a load from the vertical direction is improved. Even when the inclined plate devices 1 are stacked in multiple stages, the inclined plate devices 1 can sufficiently bear the weight and the like of the inclined plate device 1 in the upper stage, and the occurrence of breakage or the like can be reliably prevented. Further, in the present embodiment, the connection frame 6 is provided with an auxiliary frame 11 for connecting the central portions of the connection frames 6 to each other in parallel with the upper and lower sides of a parallelogram formed by the side frames 5. 2 is further improved in strength, and the auxiliary frame 9
The auxiliary frame 12 is also attached so as to connect the connecting portion of the frame 2 and the side frame 5. Since the auxiliary frame 12 is also connected to the auxiliary frame 11, the strength of the frame 2 can be further secured. it can.

Further, in the present embodiment, holding members 13 are provided on the auxiliary frame 11 and the upper and lower sides of the side frame 5 to bite and fix the inclined plate 7. , 5 and one pair of holding frames 11, 11, one holding plate 13 is used one by one so that a single inclined plate 7 is held by a total of six holding members 13. This makes it possible to securely attach the inclined plate 7 to the frame 2 and also causes a problem such as peeling of the bonded portion due to aging as in the case where the inclined plate is adhered to the frame and held. Therefore, the inclined plate 7 can be stably held for a long period of time. Moreover, in the present embodiment, the six holders 13 are configured to bite and hold the inclined plate 7 curved in a waveform at a position where the waveform is most protruded. There is no displacement in the width direction as well as in the thickness direction and the vertical direction, so that the inclined plate 7 can be more securely and stably attached to the frame 2.

Further, in the present embodiment, the size of the frame 2 of each inclined plate device 1 is 1 to 1.5 m in width and 2 to 1.5 m in length.
The height is set in the range of 2.5 m and the height is in the range of 1 to 1.5 m, and the workability and handleability when installing the inclined plate device 1 are enhanced while securing the strength of the frame 2 as described above. In addition, the advantage that the inclined plate device 1 can be provided at a relatively low cost and is economical can be obtained. That is, if the size of the frame 2 is larger than the above range, the weight of the inclined plate device 1 is increased, and the workability and handleability at the time of installation are impaired. When placed in a unit, there is a possibility that the size of the sedimentation basin 21 may not be adjusted. On the contrary, if the size of the frame 2 is smaller than the above range, many sedimentation basins 21 of the same size may be used. It is uneconomical to install the inclined plate devices 1... When the inclined plate devices 1 are stacked, an unnecessarily large load acts on the frame 2 of the lower inclined plate device 1. Is not preferred.

Further, in the present embodiment, the inclined plate 7
, The pipe members 3 and the joints 4 are made of plastic, do not rust or corrode unlike metal members, can greatly extend the life thereof, and have the inclined plate device 1. Can be manufactured lightly, and the workability at the time of installation can be further improved. Moreover, in the present embodiment, the joints 4 for connecting the pipe members 3 are integrally formed by injection molding of a shape obtained by combining a plurality of cylinders, and the joints 4 are formed separately. Since it is stronger and more inexpensive to manufacture than the one in which the parts are joined, and the pipe members 3 can be connected only by inserting the pipe members 3 into the cylinder, the frame 2 Is also very easy to assemble.

In this embodiment, as described above, the side frame 5 of the frame 2 is formed by combining the pipe members 3 in a horizontally long parallelogram, and the inclined plates 7 are formed by the parallelograms. Although it is arranged in parallel with the inclined side of the shape, for example, the side frame is formed in another rectangular shape such as a rectangular shape, and the inclined plate is arranged so as to be inclined with respect to the short side of this square. You may do so. In the inclined plate device configured as described above, particularly when the side frame 5 is formed in a rectangular shape or a square shape, even when the inclined plate devices are stacked in a sedimentation tank and arranged in multiple stages, the inclined plate on the upper stage side is provided. Since the weight of the device can be supported vertically along the short side of the side frame of the lower inclined plate device, it is possible to more reliably prevent the lower inclined plate device from being damaged during draining. It becomes possible. In the present embodiment, the lower surface of the frame 2 of the inclined plate device 1 is placed on the mounting surface 8.
However, since the side frame 5 has a parallelogram shape, the frame body 2 is symmetrical in the upside down direction, and accordingly, the inclined plate device 1
It is of course possible to turn the surface upside down and use the surface shown as the upper surface of the frame 2 in FIGS. 1 to 3 as the mounting surface 8.

[0025]

As described above, according to the present invention,
The inclined plate is held in the frame, and the inclined plate device forms a unit. By mounting this inclined plate device on the sedimentation basin, the inclined plate can be easily arranged in the sedimentation basin. , The time and labor required for installing the inclined plate can be greatly reduced. In addition, since the mounting strength of the inclined plate is improved by being held by the frame, when sedimentation and separation of raw water with high turbidity is performed, or when severe water flow occurs when pouring or draining the sedimentation basin However, it is possible to prevent the inclined plate from coming off or being damaged, to prevent a situation where repair work is required, and to achieve stable sedimentation and separation for a long period of time.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a side view of the embodiment shown in FIG.

FIG. 3 is a plan view of the embodiment shown in FIG. 1;

FIG. 4 is an enlarged view of the embodiment shown in FIG.

5 is a sectional view of a sedimentation basin 21 on which the inclined plate devices 1 of the embodiment shown in FIG. 1 are installed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inclined plate apparatus 2 Frame 3 Pipe material 4 Joint 5 Side frame 6 Connection frame 7 Inclined plate 8 Mounting surface 9,10,11,12 Auxiliary frame 13 Holder 21 Settling pond

Claims (6)

[Claims] 1. An inclined plate device comprising a plurality of inclined plates held in a frame, and capable of being mounted in a settling tank in a unit shape. 2. The inclined plate device according to claim 1, wherein the inclined plate is formed in a wavy shape in a width direction thereof. 3. The frame body is formed by connecting pipe members, and includes a pair of square side frames and a connecting frame connecting the corresponding corners of these side frames. The inclined plate device according to claim 1 or 2, wherein: 4. The connecting frame is provided with an auxiliary frame for connecting a central portion of the connecting frame to upper and lower sides of a square formed by the side frames in parallel with each other. The inclined plate device according to claim 3, wherein each of the sides is provided with six holding members that bite and fix the inclined plate with respect to one of the inclined plates. 5. The inclined plate device according to claim 1, wherein the inclined plate is made of plastic. 6. The inclined plate device according to claim 1, wherein the frame is formed by connecting a plastic pipe member with a plastic joint.