JPS5925450Y2 - Inclined plate sedimentation device with baffle plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the prevention of short-circuit flow passing below the inclined plate apparatus in a horizontal counterflow type inclined plate sedimentation apparatus.

Generally, an inclined plate sedimentation device requires a space below the inclined plate device for depositing sludge, and a sludge scraper is often provided in this space.

However, especially in the case of horizontal counterflow inclined plate settling equipment,
Since the resistance to the water flow below the inclined plate device is lower than that at the inclined plate portion, a short circuit flow is generated that passes under the inclined plate device, resulting in a reduction in processing efficiency.

Conventionally, as a means to prevent such a short-circuit flow, as shown in Utility Model Publication No. 55-9366, a rotary silt scraper installed below the inclined plate device is used to prevent the inclined plate from reaching the vicinity of the lower end of the inclined plate. It is known to provide an elongated cylindrical baffle wall.

However, the above-mentioned conventional short-circuit flow prevention means has the disadvantage that it can only be applied when a rotary sludge scraper is provided below the inclined plate device, and its range of use is extremely narrow.

The present invention solves the above-mentioned drawbacks, regardless of the type of sludge scraper installed, and even if it is a type that simply drains accumulated sludge without a sludge scraper. ,
It is an object of the present invention to make it possible to reliably prevent the occurrence of short circuit currents using a simple device.

That is, in the present invention, a baffle plate consisting of a large number of fins arranged in parallel like a blind or shutter, which can be freely tilted from outside the tank, is installed so that the distance between at least the inner wall on the raw water inflow side of the tank and the vicinity of the lower end of the inclined plate device is approximately The present invention provides an inclined plate sedimentation device with a baffle plate that is installed substantially horizontally so as to be buried.

Hereinafter, the present invention will be explained in more detail with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment of the inclined plate sedimentation device with a baffle plate according to the present invention, and FIG. 2 is an enlarged sectional view of the baffle plate.

In the figure, 1 is a horizontal counterflow inclined plate sedimentation tank equipped with a water supply part 2 on one side and a drainage part 3 on the other side.
In between are porous rectifying walls 4, 4'.

A tilted plate device 5 is provided in the tank 1, and below the tilted plate device 5 is a settling section 6 for storing the removed sludge.

A baffle plate 7 is attached to the inflow side and the outflow side of the tank 1, respectively, so as to substantially fill the gap between the inner wall of the tank 1 and the vicinity of the lower end of the inclined plate device 5.

As shown in FIG. 2, this baffle plate 7 is made up of a large number of flat plate-shaped fins 8 arranged in a blind or shutter-like manner, and the lower and upper ends of each fin 8 are connected to a frame 9 and is pivotally supported by a shaft 11 supported by a connecting rod 10.

One end of the connecting rod 10 is pulled diagonally downward by a spring 12, and a wire 13 is attached to the other end of the connecting rod 10.

This wire 13 passes through a pulley 14 provided on the frame 9 and extends to a performance device 15 provided outside the tank 1.

Therefore, each fin 8 of the baffle plate 7 can be freely tilted by pulling or loosening the wire 13 with the hoist 15.

Next, to explain the function and effect, the raw water flowing into the tank 1 from the water supply part 2 through the rectifying wall 4 is blocked by the baffle plate 7 between the vicinity of the lower end of the inclined plate device 5 and the inner wall of the tank 1. Therefore, it is reliably sent into the inclined plate device 5 without creating a short circuit flow passing below the inclined plate device 5.

The sludge separated by the inclined plate device 5 is deposited in the settling section 6, and the settled sludge can be collected and discharged using any type of scraper.

That is, since the baffle plate 7 is located approximately horizontally near the lower end of the inclined plate device 5 and is not installed inside the settling section 6, what type of scraper is installed in the settling section 6? It does not get in the way when installed, and furthermore, the shape of the bottom of the tank 1 can be arbitrarily determined to be flat, forest-like, or one-sided.

In addition, since the baffle plate 7 is installed approximately horizontally, the tank 1
Not only can short circuit flow be prevented without disturbing the water flow inside, but
Each fin 8 of the baffle plate 7 can be tilted from the outside of the tank 1, so if sludge accumulates on the baffle plate 7, simply wind up or loosen the wire 13 and tilt the fin 8. The sludge on the baffle plate 7 can be easily brushed off.

Here, each fin 8 of the baffle plate 7 can be used with it completely laid down so that there is no gap between the fins 8, or each fin 8 can be slightly raised to leave a gap between the fins 8. It is up to you whether to use the fins 8 or not, but if the fins 8 are laid down, sludge tends to accumulate on the baffle plate 7, and the accumulated sludge must be frequently brushed off. It is more convenient to use.

In this case, it is preferable to adjust the inclination of the fins 8 so that the resistance to the flow in the tank 1 is equal to or greater than that of the inclined plate device 5, but in the case of the present invention, each fin 8
Since it can be easily tilted from the outside of the tank 1, there is also the advantage that it can be optimally adjusted in consideration of the flow rate, etc.

In the illustrated example, baffle plates 7 are provided on both the inflow and outflow sides of the tank 1, but a considerable short-circuit flow blocking effect can be obtained even if only the inflow side is used, so in some cases, the baffle plate 7 is provided only on the inflow side. You can also use it as

Furthermore, the fins 8 of the baffle plate 7 are normally arranged at right angles to the flow and are used lying in the flow direction, but the fins 8 may also be arranged parallel to the flow.

Furthermore, the current baffle plate 7 may be installed as a large one piece, but since it is easier to obtain one with excellent strength, it is generally preferable to divide it into a plurality of pieces and install them side by side. preferable.

FIG. 3 is a sectional view showing another embodiment of the baffle plate, in which the fins 8 have a rhombic cross-sectional shape.

Each fin 8 is fixed to a shaft 11 supported by a frame 9.

An arm 16 is fixed to the end of the shaft 11, and the upper end of each arm 16 is connected to the connecting rod 10 by a pin 17.

One end of the connecting rod 10 is similar to that shown in FIG.
It is pulled diagonally downward by a spring 12, and a wire 13 is attached to the other end of the connecting rod 10, which extends through a pulley 14 to a hoist 15 shown in FIG.

This baffle plate 7 also allows the fins 8 to be tilted freely by pulling or loosening the wire 13, and it is easy to obtain a relatively large resistance to water flow without having to lie down each fin 8 that much. This reduces the risk of sludge accumulating on the baffle plate 7.

Another aspect of the present invention is to adjust the resistance to water flow while preventing the accumulation of sludge by making the cross-sectional shape of the fin triangular or by forming a large number of holes in the fin.

Furthermore, the mechanism for tilting the fins is not limited to the one shown in Figures 2 and 3, and may be a manual mechanism or a powered mechanism as long as it can be operated from outside the tank. Various mechanisms can be adopted.

As explained above, according to the present invention, regardless of the type of sludge scraper, it is possible to reliably prevent the occurrence of short-circuit flow that would pass under the inclined plate device with an extremely simple configuration. It has many advantages, such as the fact that even the internal equipment can be improved with relatively simple construction.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the inclined plate sedimentation device with a baffle plate according to the present invention, and FIG. 2 is an enlarged sectional view of the baffle plate.
FIG. 3 is a sectional view showing another embodiment of the baffle plate.

Claims (3)

[Scope of utility model registration request] (1) In the horizontal counterflow type inclined plate sedimentation device, the baffle plate 7 is installed substantially horizontally so as to substantially fill the gap between at least the inner wall of the raw water inflow side of the tank 1 and the vicinity of the lower end of the inclined plate device 5, and The inclined plate sedimentation device with a baffle plate is characterized in that the baffle plate 7 is a large number of fins 8 arranged in parallel like a blind or a shutter, which can be freely tilted from outside the tank 1. (2) The inclined sedimentation apparatus with a baffle plate according to claim 1, wherein the baffle plate 7 is divided into a plurality of parts. (3) An inclined plate with a baffle plate according to claim 1 of the utility model registration claim, characterized in that a baffle plate 7 similar to that attached to the inflow side of the raw water is also attached to the outflow side. Precipitation equipment.