JPH11255296A - Apparatus for supplying constant quantity - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily supply a constant quantity without requiring an electric and air sources, enable setting for a plurality of demanded quantities, enable supply by a single operation and reduce supply distribution time compared with a conventional apparatus. SOLUTION: A plurality of sub tanks 2A to 2C each formed in a predetermined capacity are provided, a connection pipe L for successively connecting the sub tanks 2A to 2C with an end connected to a main tank 1 is provided, and three-way valves 3A to 3C having an end connected to a supply port 4A to 4C are interposed between the respective sub tanks 2A to 2C of the connection pipe L and between the final sub tank 2A to 2C and the main tank 1. The respective three-way valves 3A to 3C are connected between the tanks normally with a supply port closed and connect the main tank 1 with the respective sub tanks 3a to 3C, and one of the three-way valves 3A to 3C is selectively operated to open a sub tank 2A to 2C on an upstream of the valve 3A to 3C to the supply port 4A to 4C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixed amount supply device for supplying a fixed amount of liquid.

[0002]

2. Description of the Related Art Heretofore, for example, oil stored in a central tank or a poly tank has been distributed to necessary places while being measured by an operator using a mug.

[0003] As described above, since the metering and distribution are performed, the amount of supply / discharge (speed) from the tank is limited, and it takes time. During this time, the operator needed to monitor the scale of the mug, which caused a waiting time, and if the timing of stopping the cock was incorrect, oil overflowed from the mug.

Incidentally, Japanese Patent Application Laid-Open Nos. Hei 5-272694, Hei 6-42327, and Hei 9-13823
No. 7 discloses techniques for measuring and supplying a predetermined amount from a tank, but none of these techniques corresponds to the problem to be solved by the present invention.

[0005]

SUMMARY OF THE INVENTION The present invention does not require an electric or air source, can easily supply a fixed amount, can set a plurality of required amounts, can supply in one operation, and can supply and distribute the supply time. It is an object of the present invention to provide an apparatus for quantitatively supplying a liquid that can reduce the amount of liquid to be supplied.

[0006]

According to the present invention, in a quantitative supply device for supplying a constant amount of liquid from a tank, a plurality of sub-tanks each having a predetermined volume are provided, and these sub-tanks are sequentially communicated. A three-way valve, one of which communicates with the supply port, is provided between each sub-tank of the communication pipe and between the last sub-tank and the main tank. The three-way valve is normally connected to the main tank and each sub-tank as a tank-to-tank connection with the supply port closed, and one of the three-way valves is selectively operated to open the sub-tank upstream of that valve to the supply port. ing.

Further, according to the present invention, there is provided a volume variable means capable of changing the volume of the sub tank.

Therefore, according to the present invention, if the volume of each sub-tank is set such that the sum of the volumes of the sub-tanks upstream of each three-way valve becomes a predetermined supply amount, the volume of each sub-tank from the main tank is always maintained. Is supplied, and a predetermined supply amount can be reliably and easily supplied by selectively operating the three-way valve.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, a plurality of sub-tanks 2A to 2C in the illustrated example are provided at the bottom of the main tank 1 each having a predetermined volume. Pipes K,... Are provided at the bottoms of the sub tanks 2A to 2C and the main tank 1, respectively. These pipes K,. , K are provided with three-way valves 3A to 3C (3 in the case of representative description) having supply ports 4A to 4C below.

As shown in FIGS. 2 and 3, the three-way valve 3 closes the supply port 4 by operating the cock 3a to communicate the upstream and downstream communication pipes L (FIG. 2) and upstream (left in the figure). The communication (FIG. 3) between the communication pipe L and the supply port 4 is switched. In each of the sub-tanks 2A to 2C, an air vent pipe 6 extending upward from the liquid level M of the main tank 1 is provided upright.

Next, an example of the fixed amount supply will be described with reference to FIGS. In the illustrated example, the first sub-tank 2A
Is 2 liters, the volume of the second sub-tank 2B is 0.5 liter, and the volume of the third sub-tank 2C is 1.5 liters. First, as shown in FIG. 4, the three-way valves 3A to 3C are always in communication with each other, and the sub-tanks 2A to
Since 2C is communicated with the atmosphere by an air vent pipe 6, oil is supplied from the main tank 1.

Then, as shown in FIG. 5, the first three-way valve 3
A operates the oil (Q) in the first sub tank 2A.
1) 2 liters are supplied from the supply port 4A. As shown in FIG. 6, when the second three-way valve 3B is operated, the total (Q2) of 2 liters of oil in the first sub-tank 2A and 0.5 liters of oil in the second sub-tank 2B is (Q2) 2.5.
Liters are supplied from the supply port 4B. Further, as shown in FIG. 7, when the third three-way valve 3C is operated, 2 liters of oil in the first sub-tank 2A and the second sub-tank 2
0.5 liter of oil in B and third sub tank 2C
A total of 4 liters (Q3) of 1.5 liters of the oil is supplied from the supply port 4C.

In the embodiment shown in FIG. 8, the main tank 1 is divided into three sections for supplying different kinds of oil,
Each of the tanks 1A to 1C is provided with a sub-tank 2D to 2I having a volume corresponding to the required amount. In the illustrated example, the volume of each sub-tank is 2 liters for 2 liters, 2E, 2E,
F is 2 liters, 2G is 2 liters, 2H is 0.5 liters, and 2I is 1.5 liters. Therefore, the liquid in tank 1A is 2 liters from valve 3D, and the liquid in tank 1B is valves 3E and 3F. Can supply 2, 2.5 and 4 liters of liquid from the tanks 3C, 3H and 3I respectively.

FIG. 9 and FIG. 10 show an embodiment of the volume changing means 10. A cylinder 13 on which a piston 14 is slidably fitted is provided on the side of the main tank 1, and lids 11 and 12 are fixed to both ends thereof via O-rings 22. Reference numeral 21 denotes an O-ring for sealing between the cylinder 13 and the piston 14.

A communication pipe L is connected to one lid 11 from the main tank 1 through a three-way valve 4, and a rod 15 having one end fixed to the piston 14 is connected to the other lid 12. Air vent pipes 6, 6 are penetrated from above the respective lids 11, 12 and communicate with the upper part of the main tank 1.

A screw rod 16 screwed to a support member 17 is connected to the other end of the rod 15, and a handle 18 is fixed to the other end of the screw rod 16. Note that reference numeral 19 is
4 shows a scale for reading the extension position of the rod 15.

With such a configuration, the volume S formed by the piston 14 in the cylinder 13 and the lid 11 can be arbitrarily set by operating the handle 18, and the sub-tank described in the above embodiment can be set. The volume can be changed, and the supply amount of the liquid in the tank 1 can be changed.

[0018]

The present invention is configured as described above,
The following effects are obtained. (1) There is no need for weighing work and there is no risk of overflow. In addition, since the operation is stopped at a fixed rate, the discharge amount (speed) can be increased, the supply time can be shortened, and other work can be performed during this time. (2) Reliable quantitative supply is possible with a simple mechanism without using electricity and air. In addition, the capacity can be easily changed, and it is versatile. (3) Compared to providing a tank for each required supply amount, the total amount of each tank volume is supplied, so that the total amount of the sub-tank can be reduced.

[Brief description of the drawings]

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

FIG. 2 is a view showing a state in which the three-way valve of FIG. 1 is closed.

FIG. 3 is a diagram showing a supply state of the three-way valve of FIG. 1;

FIG. 4 is a diagram showing a filling state of each sub tank.

FIG. 5 is a diagram showing a state where a first three-way valve is open.

FIG. 6 is a diagram showing a state where a second three-way valve is open.

FIG. 7 is a diagram showing a state in which a third three-way valve is open.

FIG. 8 is a diagram showing another embodiment.

FIG. 9 is a perspective view showing a variable capacitance means.

FIG. 10 is a sectional view of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Main tank 2A-2C ... Sub tank 3A-3C ... Three-way valve 4A-4C ... Supply port 5 ... Communication pipe 6 ... Air release pipe 10 ... Volume variable means L * ..Communication pipes

Claims (2)

[Claims] 1. A fixed-rate supply device for supplying a fixed amount of liquid from a tank, comprising a plurality of sub-tanks each having a predetermined volume, and communicating these sub-tanks sequentially and connecting one end thereof to a main tank. Set up a tube,
A three-way valve, one of which communicates with the supply port, is interposed between each sub-tank of the communication pipe and the last between the sub-tank and the main tank. A fixed-quantity supply device, wherein a tank is connected to each sub-tank, and one of the three-way valves is selectively operated to open a sub-tank upstream of the valve to a supply port. 2. The fixed-quantity supply device according to claim 1, further comprising a volume changing means capable of changing a volume of the sub-tank.