JPH0723197B2 - Gas-liquid separation chamber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention has an atmosphere communication hole in the upper part of a case, a gas outflow control valve for opening and closing the atmosphere communication hole, and a liquid containing gas. The present invention relates to a gas-liquid separation chamber for separating gas.

[Prior Art] As is well known, a gas-liquid separation chamber is provided with an inflow port for a gas-mixed liquid, and a liquid outflow control valve for controlling outflow of liquid in a lower part and a gas outflow control for controlling outflow of a gas in an upper part. And a valve is provided. A technique for independently controlling these control valves is disclosed in Japanese Patent Laid-Open No. 61-262282, and
The technique of controlling in conjunction is disclosed in Japanese Examined Patent Publication No. 51-27483.

In such a known gas-liquid separation chamber, if the inside of the chamber is filled with liquid due to some inconvenience such as failure of the liquid outflow control valve or inflow of liquid from another pump device, the gas outflow control valve is closed, and thereafter The liquid (the one that flows in from the gas-liquid mixture inlet and the one that flows backward due to the other pump device) does not flow into the device, and the liquid is prevented from being blown out from the gas outflow control valve.

However, the known gas outflow control valve of the gas-liquid separation chamber is a float-operated valve, and after the liquid level in the gas-liquid separation chamber rises and is closed, even if the liquid level drops, the float is light. The pressure in the gas-liquid separation chamber becomes high while the valve is closed, and the valve may not be opened because the internal pressure is high.

Therefore, it is necessary to make the float heavy or increase the lever ratio of the float rod. However, if it is made heavy, the valve will not close due to bubbles or the like, so the liquid will blow out, and if the lever ratio is made large, the gas-liquid separation chamber becomes large.

Further, the gas-liquid separation chamber disclosed in Japanese Patent Publication No. 51-27483 has the same drawback.

[Problem to be Solved by the Invention] Therefore, an object of the present invention is to provide a gas-liquid separation chamber which is small even if a float is used and whose valve closed state is not maintained by internal pressure.

[Means for Solving the Problem] According to the present invention, an atmosphere communication hole is provided in an upper portion of a case, and a gas outflow control valve for opening and closing the atmosphere communication hole is provided, and
In a gas-liquid separation chamber for separating gas from a liquid containing gas, a float is fixed to a float rod pivotally attached to the case, and a lower end of a valve rod having a cone-shaped upper end is pivoted in the middle of the float rod. A pin provided near the upper end of the valve rod is engaged with an elongated hole formed in the side of the valve disc loosely fitted on the valve rod, and the valve disc has a hemispherical upper end and a tip end. A small-diameter valve hole is formed in the valve body, and the valve body opens and closes the atmosphere communication hole.

[Explanation of Action and Effect] Therefore, in normal operation, as is well known, the gas separated in the gas-liquid separation chamber is released to the atmosphere through the atmosphere communication hole, and when the gas-liquid separation chamber is filled with the liquid, the atmosphere communication is performed. A gas outflow control valve closes the atmosphere communication hole so as to prevent the liquid from being discharged from the hole into the atmosphere.

However, in the prior art, when the liquid level in the gas-liquid separation chamber drops after the gas outflow control valve is closed, the float also moves downward, but the gas outflow control valve closes the atmosphere communication hole and the gas-liquid separation chamber is closed. If the pressure is high, the float does not drop with the gas outflow control valve blocking the atmosphere communication hole due to the internal pressure.

However, according to the present invention, when the float moves downward due to the drop in the liquid level even when the internal pressure is high in the state where the valve body closes the atmosphere communication hole, the valve rod also moves slightly downward due to the pin being guided by the elongated hole. To do. Then, the cone-shaped upper end of the valve rod opens a small-diameter valve hole. When the small-diameter valve hole is opened in this way, the gas in the gas-liquid separation chamber is released into the atmosphere through the valve hole, and the pressure in the gas-liquid separation chamber is lowered. Therefore, the valve body is released from the holding state by the internal pressure and can move downward together with the float.

In this way, when the liquid fills up, the valve rod with a cone-shaped upper end closes the small-diameter valve hole, and if the liquid level drops, the valve rod will be closed even if the valve body closes the atmosphere communication hole. Can be moved downward by being guided by the long hole. Therefore, when the float moves downward, the pressure in the gas-liquid separation chamber is released to the atmosphere, and the valve body can be separated from the atmosphere communication hole.

Therefore, the operation of the float valve can be ensured without making the float heavy or lengthening the length of the float rod.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, a refueling machine A has a pump device U driven by a motor M, and a suction pipe P1 and a discharge pipe P2 connected to an underground tank (not shown) are connected to the pump device U. A flow meter G is provided on the discharge pipe P2, and a nozzle N is connected to the discharge pipe P2 via a hose H. Further, on the front surface of the fueling machine A, a display B for displaying the amount of fueling based on a signal from the flow meter G is provided, and an air vent 14 (described later) connected to the casing C of the pump device U is connected to the nozzle hook S. It is opened at the top.

In FIG. 2, a casing C of the pump device is provided with a liquid inlet I and a liquid outlet O. A check valve 1 is provided at the inner end of the inflow port I, and opens to a chamber 2 provided with a strainer 2a on the inflow side. A pump 3 is provided in the substantially center of the casing C. The pump 3 has a suction port 3a and a discharge port 3b.
3b communicates with the gas-liquid separator 4. In this gas-liquid separation device 4, the liquid containing no bubbles is strainer 5a on the outflow side.
The flow path is configured so as to flow into the chamber 5 provided with the control valve 6, and a control valve 6 is provided between the outflow-side stoner chamber 5 and the outlet O. A bypass valve 12 is provided in the liquid passage 11 of the liquid of the gas-liquid separator 4, and the liquid passage 11 communicates with the suction port 3a of the pump 3.

On the other hand, in the gas-liquid separating device 4, the liquid containing bubbles flows in the liquid passage 13. The liquid passage 13 is formed in the side cover of the casing C. The liquid path 13 communicates with a gas-liquid separation chamber 8 described later. The gas separated in the gas-liquid separation chamber 8 is discharged into the atmosphere from the atmosphere communicating portion, that is, the atmosphere communicating portion 14 in the illustrated example, and the liquid separated from the gas flows into the liquid passage 15. The liquid passage 15 communicates with the strainer chamber 2 on the inflow side. And gas-liquid separation chamber 8
A gas outflow control valve 7 for controlling the outflow of the gas released from the atmosphere communicating portion 14 to the atmosphere is provided therein, and a liquid outflow control valve 10 for controlling the liquid flowing from the liquid passage 15 to the strainer chamber 2 is provided therein. ing.

Therefore, when the pump 3 is rotated by the motor M, the liquid passes from the inflow port I through the check valve 1, the inflow side strainer chamber 2, the pump 3, the gas-liquid separator 4, the outflow side strainer chamber 5, and the control valve 6. It is discharged from the outlet O. A part of the liquid from the gas-liquid separator 4 passes through the bypass valve 12 and is bypassed to the pump 3. On the other hand, in the gas-liquid separation device 4, the liquid containing gas flows into the gas-liquid separation chamber 8, where the gas is discharged from the atmosphere communicating portion 14, and the liquid is returned to the strainer chamber 2 on the inflow side.

At that time, the gas outflow control valve 7 of the gas-liquid separation chamber 8 is closed when the liquid is filled in the gas-liquid separation chamber 8 due to an unexpected situation, so that the liquid is not discharged from the atmosphere communicating portion 14. . The liquid outflow control valve 10 is adapted to flow the liquid into the liquid passage 15 when a certain amount of the liquid has accumulated in the gas-liquid separation chamber 8.

FIG. 3 shows the details of the gas-liquid separation chamber 8. The lid 16 is provided with an atmosphere communication passage 14a which communicates with the atmosphere communication portion 14, and this atmosphere communication passage 14a faces downward inside the lid 16. Atmosphere communication hole 1
It ends at 4b. A gas outflow control valve, generally designated by 7, is provided to open and close the atmosphere communication hole 14b.

The gas outflow control valve 7 is provided with a float 21 fixed to a float rod 20 pivotally attached to a mounting portion 16a of a lid 16 which constitutes a case of the gas-liquid separation chamber 8. The valve rod 22 is pivotally attached. An upper end of the valve rod 22 is formed in a cone shape, and a pin 22a is projected to one side near the upper end. The valve body 30 is formed into a hemispherical tubular shape at the upper end, has a small-diameter valve hole 31 at the tip, and has a long hole 32 at one side. The valve rod 22 is provided in the inner hole of the valve body 30.
Is loosely inserted, and its pin 22a is engaged with and guided by the long hole 32.

Next, a liquid outflow control valve indicated by reference numeral 10 is provided with a float rod 25 pivotally attached by a pin 24 to a bracket 23 integrally formed with a lid body 16 which also constitutes a case.
A float 26 is attached to 25. A valve body 27 is pivotally attached to the float rod 25 on the float 26 side of the pivotally mounted pin 24 via another pin 28. The valve body 27 is adapted to open and close the opening 15a of the liquid passage 15.

At the time of operation, the liquid containing the gas from the liquid passage 13 is separated into the gas-liquid separation chamber
When flowing in, the gas and the liquid are separated in the gas-liquid separation chamber 8. Then, the gas passes through the upper atmosphere communication hole 14b opened by the valve body 30 at the position shown in the drawing, and the atmosphere communication unit 1
Released from 4 into the atmosphere. On the other hand, the liquid accumulates below the gas-liquid separation chamber 8. As a result, the float 26 floats in the direction indicated by the chain line 26a. Then, the valve body 27 opens and the gas-liquid separation chamber 8
The liquid accumulated inside flows out into the liquid passage 15 through the opening 15a.

For example, if the gas-liquid separation chamber 8 is filled with liquid due to some inconvenience such as a failure of the liquid outflow control valve 10 or the inflow of liquid from another pump device, the float 21 floats to the position indicated by the chain line. As a result, the float rod 20 rotates counterclockwise, the valve rod 22 is raised, and the atmosphere communicating hole 14b is closed by the valve body 30 to prevent the liquid from flowing out.

Now, for example, if the float 21 does not operate and the flow path 15 is closed due to some failure, or if a large amount of liquid flows in by another pump device, as described above, the inside of the gas-liquid separation chamber 8 is And the valve body 30 closes the atmosphere communication hole 14b. When the liquid further flows into the gas-liquid separation chamber 8, the internal pressure of the gas-liquid separation chamber 8 inevitably rises above atmospheric pressure because the atmosphere communication hole 14b is closed. When the float 21 operates normally in such a state, or when the inflow of the liquid from another pump device is stopped, the liquid in the gas-liquid separation chamber 8 is driven by the pump 3 and the liquid passage 15 Flows out and the liquid level drops.

At that time, according to the conventional technique, the valve body 30 causes the atmosphere communication hole due to the internal pressure.
Although 14b is maintained in the closed state, in the present invention, even if the internal pressure in the room is high, the float rod 20 slightly rotates clockwise by the length of the long hole 32 due to the weight of the float 21, and the valve is closed. Rod 22
Down to open the valve hole 31. When gas escapes from the valve hole 31 to the atmosphere communication passage 14a and the internal pressure decreases to near atmospheric pressure, the valve body 30 is no longer held at the internal pressure, the float rod 20 further rotates due to the weight of the float 21, and the pin 22a moves. The valve body 30 is pulled down and opened by engaging with the lower edge of the long hole 32.

As described above, according to the present invention, the inoperability of the float valve can be reliably prevented by the internal pressure.

[Effects of the Invention] As described above, the present invention has the following excellent effects.

(I) When the float of the gas outflow control valve moves downward, first, the small-diameter valve hole opens to allow the atmosphere communication portion and the gas-liquid separation chamber to communicate with each other, so that the valve body is held in the closed position by the internal pressure. Never.

(Ii) Since the valve body is opened and closed reliably, the float can be made smaller and lighter, and the lever ratio of the float rod can be made smaller.

(Iii) Therefore, the gas-liquid separation chamber can be downsized, the valve can be reliably closed even when bubbles or the like are present on the liquid surface, and the liquid does not blow out into the atmosphere through the atmosphere communicating portion.

[Brief description of drawings]

FIG. 1 is a front view showing an oil dispenser equipped with a gas-liquid separation chamber embodying the present invention, FIG. 2 is a schematic diagram showing the entire gas-liquid flow of FIG. 1, and FIG. It is a sectional side view showing an example. 7 ... Gas outflow control valve, 8 ... Gas-liquid separation chamber, 10 ... Liquid outflow control valve, 20 ... Float rod, 22 ... Valve rod, 22a ...
Pin, 30 ... Valve element, 31 ... Valve hole, 32 ... Oval hole

Claims (1)

[Claims] 1. A case in a gas-liquid separation chamber for separating a gas from a liquid containing a gas, comprising an atmosphere communication hole in an upper part of the case, a gas outflow control valve for opening and closing the atmosphere communication hole, A float is fixed to the float rod pivotally attached to the valve rod, the lower end of the valve rod having a cone-shaped upper end is pivotally attached in the middle of the float rod, and a pin provided near the upper end of the valve rod is loosely attached to the valve rod. The valve body is engaged with a long hole formed in the side portion of the valve body, the valve body has a hemispherical upper end and a small diameter valve hole is formed at the tip, and the valve body communicates with the atmosphere. A gas-liquid separation chamber characterized by opening and closing holes.