JPH0120765B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a metering device used, for example, to direct a volume of wastewater into an inclined screen as part of a water treatment system.

Conventionally, inclined screens have been used, for example, for the purpose of separating solids from sewage, but in this case the amount of sewage introduced into the screen must be kept constant at all times in order to improve screen efficiency. For this purpose, a metering device is used in front of the screen, and this metering device is usually constructed with a long overflow weir installed in the tank and a notch in the form of a long overflow weir. However, the amount of sewage flowing into the raw water storage tank varies widely depending on the time of day, and therefore the amount of sewage sent from the raw water tank to the metering device also varies greatly.
No matter how long an overflow weir is installed, it is impossible to maintain a constant flow rate from a metering device, and especially when the required flow rate is small, fluctuations have an even greater effect. .

In view of the above-mentioned current situation, the present invention aims to obtain a metering device that always maintains a constant amount of outflow regardless of the amount of inflow from the raw water tank, by dividing the inside of the adjustment tank by an overflow plate and a rectifying plate. An inflow pipe is connected to the chamber between the overflow plate and the current plate to form an inflow chamber, and a reflux port is provided at the bottom of the chamber divided through the inflow chamber and the overflow plate to form a reflux chamber, An outflow pipe is provided at the bottom of the chamber divided into the inflow chamber and the rectifying plate, protruding and fixed into the tank as appropriate, and the inflow section is connected to the upper part of the outflow pipe via a telescopic bellows tube, and the inflow section is located above the inflow section. The present invention relates to a measuring device characterized in that a measuring chamber is formed by attaching a float body in an adjustable manner.

To explain in detail based on the example shown in the figure, 1 is a regulating tank;
The overflow plate 2 and rectifying plate 3 create a reflux chamber 4, an inflow chamber 5,
It is divided into measuring chambers 6, 7 is a reflux port, and 8 is an inflow pipe through which water is fed from a raw water tank (not shown) by an appropriate pump.

Reference numeral 9 denotes an outflow pipe fixed to the bottom of the measuring chamber 6, which projects into the measuring chamber 6 at an appropriate height.A flexible bellows tube 10, which can be freely expanded and contracted, is fastened to the upper part with a band. Inflow part 1 formed in a hopper shape
1 is fastened with a band.

An appropriate number of long bolts 12 are erected and fixed on the outer periphery of the inflow portion 11, and the long bolts 1
2, and insert the float body 13 into the nut 1.
The position is determined by 4.

Numerals 15 and 16 are discs fixed to the outflow pipe 9 and the inflow part 11, and an appropriate number of guide rods 17 fixed upright on the disc 15 are loosely inserted into the disc 16, and the bellows pipe 10 is inserted into the disc 16.
The verticality of the inflow section 11 with respect to the outflow pipe 9 is maintained regardless of the expansion and contraction of the inflow section 11.

Thus, the sewage that has flowed into the inflow chamber 5 from the inflow pipe 8 is rectified by the rectifying plate 3 and flows into the measuring chamber 6 from below, and the excess sewage that has exceeded the overflow plate 2 passes through the reflux chamber 4 and exits from the reflux port 7. Returns to the raw water tank.

The wastewater that has entered the measuring chamber 6 is transferred to the float body 1.
The liquid flows from the outer periphery of the hopper of the inflow part 11 suspended by the pipe 3, passes through the bellows pipe 10, and flows out from the outflow pipe 9 toward a target screen part (not shown).

In this case, the inflow part 11 is suspended by a float body 13 that moves up and down according to fluctuations in the water surface height of the wastewater stored in the measuring chamber 6, so that it is always located below a constant water surface. , therefore the inflow part 11
The amount of water flowing into the tank is constant. Of course, bellows tube 1
0 means that the material is made of an extremely soft material that exerts almost no tension upon expansion and contraction.

In addition, the sewage flowing into the measuring chamber 6 from the inflow chamber 5 is rectified by the rectifying plate 3, and the water surface inside the measuring chamber 6 becomes flat without ripples.
5 and 16 and the guide rod 17, the verticality of the inflow part 11 is maintained, so that the amount of inflow into the inflow part 11 is not affected by the slight force of the inflowing wastewater from the inflow chamber 5.

FIG. 3 shows an embodiment for use with a small amount of water, and the inflow part 111 has a straight pipe shape and has an appropriate number of elongated hole openings 111a opened in the vertical direction in the middle part. Float body 113 integrally formed with flanged reinforcing ring 113a
is fitted and positioned and fixed with push bolts 114. In addition, the bellows tube 110 and the disc 115
(not shown) 116, guide rod 117, and other means for maintaining the verticality of the inflow portion 111 are the same as those in FIG. 1 described above.

Although the current plate 3 in the above-mentioned embodiment has a communication section formed at the bottom, the present invention is not limited to this, and an appropriate number of openings may be provided in the middle part, or a plurality of current plates may be used. By providing one or more rectifying chambers with different communication positions between the inflow chamber and the metering chamber, the water stored in the metering chamber can be maintained in a quiet state and accurate metering can be performed.

Further, the guide rod of the vertical holding means of the inflow portion may be fixed to a disk on either side, or the upper disk may be eliminated and the guide rod may be directly suspended from the lower surface of the inflow portion hopper.

Further, in the above description, the device is used to adjust the amount of inflow into an inclined screen, but the present invention is not limited to this, and the same effect can be achieved even if the device is used for other purposes having the same purpose.

As described above, the present invention divides the inside of a regulating tank by an overflow plate and a current plate, connects an inflow pipe to the chamber between the overflow plate and the current plate to form an inflow chamber, and creates an inflow chamber and an overflow A reflux port is provided at the bottom of the chamber divided by a plate to form a reflux chamber, and an outflow pipe protruding into the tank is provided at the bottom of the chamber divided by an inflow chamber and a rectifier plate, and the top of the outflow pipe is expandable and retractable. The inflow parts are connected through a bellows pipe, and a float body is installed above the inflow part so that the position can be adjusted freely to create a measuring chamber.The water surface in the measuring chamber is flat with no ripples due to the current plate, and the amount of sewage inflow is reduced. Even if the water level fluctuates, excess wastewater will flow back over the overflow plate and back into the raw water tank via the reflux chamber, and even if the water level in the metering chamber fluctuates slightly, the position of the inlet relative to the water surface will remain constant due to the float body. The outflow amount can be kept constant at all times, the outflow amount can be easily changed by adjusting the float position, and it is a simple, accurate, and inexpensive measuring device.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the overall arrangement of one embodiment of the device of the present invention, FIG. 2 is an enlarged detailed view of the main parts in FIG. 1, and FIG. 3 is a cross-sectional view showing only the main parts of another embodiment. be. In the figure, 1 is an adjustment tank, 2 is an overflow plate, 3 is a rectifier plate, and 4
1 is a reflux chamber, 5 is an inflow chamber, 6 is a measurement chamber, 9 is an outflow pipe, 10 is a bellows tube, 11 is an inflow portion, and 13 is a float body.

Claims (1)

[Claims] 1. The inside of the adjustment tank is divided by an overflow plate and a current plate,
An inflow tube is connected to the chamber between the overflow plate and the current plate to form an inflow chamber, and a reflux port is provided at the bottom of the chamber divided through the inflow chamber and the overflow plate to form a reflux chamber, and the inflow An outflow pipe that protrudes and is fixed into the tank is provided at the bottom of the chamber divided by the chamber and the rectifying plate, and the inflow section is connected to the top of the outflow pipe via a telescopic bellows tube, and the position is adjusted above the inflow section. A measuring device characterized by a measuring chamber by freely attaching a float body. 2. The measuring device according to claim 1, wherein the baffle plate can communicate with each other through a lower opening. 3. The measuring device according to claim 1, wherein the current plate can communicate with each other through an intermediate opening. 4. The measuring device according to claim 1, wherein the rectifying plate is a plurality of one or more rectifying chambers having different communication positions between the inflow chamber and the measuring chamber. 5. The bellows pipe has two discs fixedly provided near the connection between the outflow pipe and the inflow part, and an appropriate number of guide rods that are erected or vertically installed on one side of the other disc. 5. A measuring device according to any one of claims 1 to 4, which allows for loose insertion and maintains the verticality of the inflow section. 6. Any one of Claims 1 to 5, wherein the inflow portion is formed into a hopper shape, and is loosely inserted into a plurality of long bolts and a float body provided upright on the outer peripheral edge, and whose position can be freely adjusted with nuts. Weighing device as described in section. 7. Any one of Claims 1 to 5, wherein the inflow portion is in the shape of a straight tube, with an appropriate opening provided in the intermediate portion, and a float body loosely fitted above the straight tube is fixed in a position adjustable manner with an appropriate push bolt. Weighing device as described in section.