JPS5939252Y2 - Sewage treatment tank flow rate adjustment device - Google Patents

Description

[Detailed description of the invention] [Technical field] The invention has two types, a storage tank and a liquid tank, such as a sewage treatment tank having a separation chamber and an aeration chamber, and the liquid is transferred from the storage tank to the liquid tank. The present invention relates to a flow rate adjustment device for supplying water.

[Background technology] Generally, when it is necessary to store liquid flowing into a storage tank for a predetermined period of time or longer and transfer it to the liquid tank at a constant flow rate or less, the flow rate of the liquid flowing into the storage tank is always constant and continuous. There is no problem if the liquid is used regularly, but if liquid is poured into a storage tank irregularly, such as in a sewage treatment tank, a flow rate adjustment device is required between the storage tank and the liquid tank.

In other words, in a sewage treatment tank, wastewater is first introduced into a separation chamber, which is a storage tank, to separate the liquid phase and solids, and the liquid phase is advected to an aeration chamber, which is a liquid tank, for aeration treatment. However, if a large amount of sewage enters the storage tank at once and advects from the storage tank to the liquid tank in a short period of time, the sewage will become liquid before the liquid phase and solids are separated. This will cause the liquid to flow into the tank, and the residence time in the liquid tank will also be shortened, resulting in a decrease in purification ability.

Therefore, a flow rate adjustment device is required.

And as a flow rate adjustment device for a sewage treatment tank, the conventional hole 3
Seeds were used.

The tank shown in Fig. 5 has a large water surface area for the wastewater 1 in the storage tank 2, so that fluctuations in the water level are small relative to the amount of inflow water, and the storage tank functions not only as a separation chamber but also as a flow rate adjustment chamber. It is designed for tank 2 to have,
Due to the water level difference between the storage tank 2 and the liquid tank 3 serving as an aeration chamber and a settling chamber, the flow rate of the liquid advected from the storage tank 3 to the liquid tank 3 via the advection pipe 4 is slowed down, and the amount of advection water is also made uniform. It was designed so that

However, in this case, the tank itself is quite large,
This is disadvantageous for small tanks for home use.

The device shown in FIG. 6 uses a so-called air lift, in which air is sent into the advection pipe 4, and the liquid in the storage tank 2 is advected to the liquid tank 3 by the rise of air bubbles. However, this type requires a pump to send air, which requires maintenance costs and maintenance.In addition, the amount of advection water is affected not only by the amount of air but also by changes in the water level in the storage tank 2, and when the water level is high ( The amount of advection water will be slightly larger when the water pressure is low (H, W, L) than when it is low (L, W, L).

Furthermore, the one shown in Figure 7 is a level switch, etc.
The water level is detected, and if the detected water level exceeds a certain water level, the pump P sends a constant flow rate to the liquid tank 3, but this requires a water level detector, a pump, and the cost and maintenance of these. .

[Purpose of the invention] The present invention has been made in view of the points mentioned above, and the purpose of the invention is to eliminate the need for an enlarged storage tank or a pump, and to have a simple structure. To provide a flow rate adjustment device for a sewage treatment tank that can adjust the amount of water advected from a storage tank to a liquid tank in accordance with fluctuations in the water level of the storage tank, although it is small.

[Disclosure of the invention] (Structure of the invention) The flow rate adjustment device for a sewage treatment tank of the present invention includes a storage tank 2 into which a liquid such as sewage is input irregularly, and a liquid tank into which the liquid is supplied from the storage tank 2. 3, and a control valve 6 interlocked with the float 5 in the storage tank 2 via an interlocking rod 10 is provided in the advection pipe 4 communicating from the storage tank 2 to the liquid tank 3.
The opening area of the control valve 6 is reduced in conjunction with the upward movement of the control valve 6, and the drawbacks of the conventional example are solved by configuring it as described above.

That is, the float 5 moves up and down in response to fluctuations in the water level in the storage tank 2, and the control valve 6 is linked via the interlocking rod 10 in accordance with the up and down movements of the float 5. The opening area has been reduced.

Because of this, when the water level in the storage tank 2 becomes high, the float 5 rises to reduce the opening area of the control valve 6, and when the water level in the storage tank 2 becomes low, the float 5 moves down. The opening area of the control valve 6 can be increased, and the wastewater 1 can be sent at a substantially constant flow rate even if the water level in the storage tank 2 changes.

The flow rate can now be adjusted with a simple structure in which a control valve 6 is provided on the advection pipe 4 and the float 5 and the control valve 6 are interlocked by an interlocking rod 10.

(Embodiment of the invention) The storage tank 2 and the liquid tank 3 are separated by a partition plate 7, and a horizontal portion 8 of a substantially T-shaped advection pipe 4 is inserted into a through hole bored in the partition plate 7. One opening of the advection pipe 4 is introduced into the liquid tank 3 through the insertion.

A vertical portion 9 of the advection pipe 4 is disposed within the storage tank 2, and a portion interlocked with the float 5 is located in the vertical portion 9 slightly below the branch position of the vertical portion 9 and the horizontal portion 8 of the advection pipe 4. A control valve 6 is incorporated therein.

This control valve 6 is linked with a float 5 in the storage tank 2 by an interlocking rod 10, and when the float 5 is in a low position as shown in FIG. When the water level of the waste water 1 rises, and the float 5 rises accordingly as shown in FIG. 2, the control valve 6 gradually closes, thereby reducing the surface area.

As shown in FIG. 2, the control valve 6 is formed so that even when it is closed, there is a slight gap between the control valve 6 and the advection pipe 4, and the wastewater 1 gradually accumulates. Tank 2
The water is supplied from the liquid tank 3 of the sewage treatment tank to the liquid tank 3 of the sewage treatment tank.

Figures 3a and 3d show the basic mechanism of the control valve 6, in which the control valve 6 is pivotally supported in the center and is rotatable.

Figures 4a and 4b show specific interlocking mechanisms between the control valve 6 and the float 5, respectively, and Figure 4a shows the linkage mechanism of the advection pipe 4 connected to the rotating shaft of the control valve 6 using the H rule. gear 11
The control valve 6 is opened and closed through two gears 11 and 12 in accordance with the vertical movement of the float 5 by meshing with a gear 12 attached to the tip of the interlocking rod 10.

In this figure, gears 11 and 12 are not provided, and the end of the interlocking rod 10 is directly connected to the rotation shaft of the control valve 6.

In the flow rate adjustment device for a sewage treatment tank configured as described above, when the amount of liquid in the storage tank 2, that is, the amount of sewage 1 is small, the float 5 is in a low position and the control valve 6 is wide open as shown in FIG. However, when a large amount of wastewater 1 is suddenly introduced into the storage tank 2, the position of the float 5 becomes higher as shown in FIG. 2, and the opening area of the control valve 6 becomes smaller.
The amount of wastewater flowing is slightly suppressed, and a large amount of wastewater 1 does not suddenly flow into the liquid tank 3.

[Effect of the invention] As mentioned above, the present invention provides a control valve that is linked to the float in the storage tank via the interlocking rod in the advection pipe that communicates from the storage tank to the liquid tank. The control valve can be controlled to open and close through the interlocking rod, float,
It has the advantage of being able to downsize the device with a simple structure of interlocking rods and control valves, as well as ensuring operational accuracy.
Furthermore, since there is no need to use a power supply drive unit such as a pump, there are advantages in that there are fewer failures and no upkeep and maintenance is required.

In addition, since the opening of the control valve is made smaller in conjunction with the upward movement of the float, even if a large amount of wastewater is put into the storage tank at once, the wastewater will not suddenly flow into the liquid tank where the wastewater is treated. This has the advantage of eliminating

[Brief explanation of the drawing]

Fig. 1 is a partially omitted sectional view of an embodiment of the present invention, Fig. 2 is a sectional view showing one operating state of the same, Figs. b is a cross-sectional view showing a specific example of an interlocking mechanism between a control valve and a float, and FIGS. 5, 6, and 7 are cross-sectional views of conventional examples. 1 is sewage, 2 is a storage tank, 3 is a liquid tank, 4 is an advection pipe, 5
is a float, 6 is a control valve, and 10 is an interlocking rod.

Claims (1)

[Scope of utility model registration request] A storage tank into which a liquid such as sewage is input irregularly, and a liquid tank to which liquid is supplied from the storage tank are provided. A flow rate adjustment device for a sewage treatment tank, which is provided with a control valve that is interlocked with the float via an interlocking rod, and in which the opening area of the control valve is reduced in conjunction with the upward movement of the float.