JPS6225762Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a minute liquid flow rate regulating device using a float.

A conventional liquid flow rate controller generally consists of an indicator that detects the flow rate and a control valve that controls the flow rate according to the indicator. Such liquid flow rate controllers have a wide range of appropriate flow rates and are often not suitable for adjusting minute amounts of flow rate. Furthermore, when a predetermined minute flow rate of liquid is taken out from a storage tank by gravity, the flow rate varies slightly due to fluctuations in the liquid level within the storage tank. One example is the first
In the figure, the liquid level in storage tank 1 is controlled by an automatic valve for introducing liquid by a pump or the like using a normal liquid level control method.
It is controlled by turning V ₁ on and off,
The liquid in the storage tank is discharged by gravity through valves V ₂ and V ₃ , and when trying to keep the liquid flowing from the middle valve V ₃ at a very small and constant amount, the liquid flowing from the valve V ₂ will be discharged by the flow rate of the valve V ₃ . The liquid level in the storage tank fluctuates considerably, often by several times to several hundred times. This inevitably causes a change in the flow rate of the liquid coming out of the valve _V3 .

The present invention is a device for improving these drawbacks, and will be explained with reference to the embodiments shown in FIGS. 2 and 3. Figure 2 shows the float part of the device of the present invention. A synthetic resin or metal float 2 is integrally attached to a holding tube 3 that passes through its center, and the holding tube 3 has an upper opening. The tube 4 is removably held by a holder such as a screw 5. The upper opening tube 4 has a side port 6 for liquid inflow at a position below the liquid surface when the float 2 floats on the liquid surface, and its base is connected to a flexible tube 7 made of soft synthetic resin, rubber, etc. has been done. FIG. 3 shows a schematic view of the device of the present invention attached to the storage tank 1 of FIG. 1, and the float part of FIG. 2 is attached to the outlet 8 via the flexible tube 7.

As described above, liquid is continuously introduced into the storage tank 1, a small amount of liquid is taken out through valve _V3 , and a large amount of excess liquid is removed through valve _V2.
When discharging more water, the float 2 floats up and down due to fluctuations in the liquid level. At this time, since the top opening tube 4 is open at the top to vent air, a small amount of liquid flows smoothly into the side port 6 and is discharged through the flexible tube 7. In other words, the float 2 floats in accordance with the vertical fluctuations of the liquid level, and at the same time, the upper opening tube 4 fixed to it also floats, so the head difference h between the side port 6 position and the liquid level is always kept constant, and a constant, minute amount is The flow liquid will be discharged. In this case, a guide 9 surrounding the float 2 is attached to the side wall of the storage tank 1 to prevent the float 2 from swinging. This guide 9 may have any shape as long as it allows the float 2 to move up and down smoothly inside it when the liquid level goes up and down. Further, the float 2 may have any shape since its position relative to the liquid level is determined by the capacity and weight of the hollow portion. The holding tube 3 and the upper opening tube 4 are made of hard synthetic resin or metal. Further, by changing the tightening position of the screw 5 and changing the relative position between the float 2 and the upper opening tube 4, the head difference h can be increased or decreased, so that the flow rate of a small amount of liquid can be easily changed.

Since the device of the present invention is constructed as described above, when the liquid in the storage tank is continuously discharged in a small amount by gravity, the flow rate can be maintained at a constant level without being affected by fluctuations in the liquid level. Since the structure is simple, it is extremely useful industrially.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing the conventional adjusting device, Fig. 3 is a schematic diagram showing the device of the present invention, Fig. 2 a is a longitudinal sectional view of the float part of the device of the present invention, and Fig. 2 b is a cross-sectional view taken along the line A-A' in Fig. 1. It is a front view. 1: Storage tank, 2: Float, 3: Holding tube, 4: Top opening tube, 5: Screw, 6: Side port, 7: Flexible tube.

Claims (1)

[Scope of utility model registration request] A micro liquid flow rate regulating device for continuously introducing liquid into a storage tank and discharging a predetermined amount of liquid from a lower discharge port by gravity, and discharging excess liquid from another lower discharge port, which floats on the liquid surface. The float is integrated with a holding tube that passes through its center, and inside the holding tube, an upper opening tube having a side port for liquid inflow located below the liquid level of the float is attached and detached using a screw provided on the holding tube. An apparatus characterized in that the float is freely held, the upper open tube base is connected to the outlet via a flexible tube, and the float is surrounded by a guide.