JPH01308799A - Vapor-liquid separation chamber - Google Patents

Abstract

PURPOSE:To secure the function of gas flow control valve and reduce size by a method wherein a gas mixing liquid inlet port is provided, a liquid flow control valve is mounted at the lower part, and the gas flow control valve which opens and closes in two stages by a float is installed at the upper part. CONSTITUTION:When a vapor-liquid separation chamber 8 is filled with liquid due to malfunction such as a failure of a liquid flow control valve 10 or liquid flow-in from another pump device, for example, a float 21 floats to a position shown by a chain line. This swings a float lever 20 counterclockwise, arises a valve lever 22 to close an opening 14b with a valve body 30 to prevent liquid from flowing out. In case of liquid flow-in from another pump device, the liquid level drops when this pump 3 is driven to permit the liquid to flow out to a flow path 15. At this time, the float lever 20 slightly swings clockwise with the own wt. of the float 21 to have the valve lever lowered to open a valve hole 31. If gas escapes from the small hole 31 into a path 14a and the inner pressure drops to a level low enough to open the valve body 30, the float lever 20 further swings with the own weight of the float 21. This permits a pin 22a to be engaged with a lower rim of a long hole 32 to have the valve body 30 lowered and open the valve.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a gas-liquid separation chamber provided, for example, on the discharge side of a pump.

[Prior Art] Regarding such a gas-liquid separation chamber, Japanese Patent Publication No. 51-27483 discloses a type in which the operation of the re-control valve is linked and a type in which the operation is independent, and JP-A-61-F62282 discloses a type in which the operation of the re-control valve is linked. Independent actuation of the control valves is shown.

In these gas-liquid separation chambers, if the chamber is about to be filled with liquid due to a malfunction of the liquid outflow control valve or liquid flowing in from another pump device, the gas outflow control valve closes, and from then on, the gas flows into the room. This eliminates the inflow of liquid (those flowing in from the gas-liquid mixing inlet and those flowing backward due to other pump devices), and the blowing out of liquid from the gas outflow control valve is prevented.

[Problems to be Solved by the Invention] Since the gas outflow control valve of the gas-liquid separation chamber is opened in one stage,
After the liquid level rises and the valve closes, even if the liquid level falls, if the float is light, the valve may not open due to internal pressure. Therefore, it is necessary to make the float heavier or to increase the lever ratio of the float rod. However, if the valve is made heavier, the valve will not close due to bubbles, etc., and liquid will blow out.If the lever ratio is increased, the gas-liquid separation chamber will become larger.

An object of the present invention is to provide a small-sized gas-liquid separation chamber in which the gas outflow control valve operates reliably.

[Means for Solving the Problems] According to the present invention, a gas a-human liquid inlet is provided, a liquid outflow control valve is provided at the lower part, and a gas outflow control valve which is opened and closed in 92 stages by a float is provided at the upper part. There is.

The above gas outflow control valve is provided with a valve body that closes an opening on the air vent side, a small valve hole is bored in the valve body, a valve rod that closes the valve hole is provided, and one end of the valve rod is attached to the valve body. It is preferable to connect them so that they can move relative to each other in the axial direction, and to connect the other end to a float rod of a gas outflow control valve or a liquid outflow control valve.

[Function] In the gas-liquid separation chamber configured as described above, when the liquid level drops after the gas outflow control valve closes, the float rod rotates due to the float's own weight and the valve closes, even if the internal pressure is high. The rod opens the valve hole. When this causes gas to escape from the valve hole and the internal pressure drops to the valve opening pressure of the valve body, the float rod further rotates due to the float's own weight and opens the valve body.

[Example] The present invention will be described in detail below with reference to the drawings.

In FIG. 1, the oil supply IIA 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. The discharge pipe P2 has a flowmeter G.
Further, a nozzle N is connected to the discharge pipe P2 via a hose H. In addition, on the front of refueling machine A,
A display B that displays the amount of oil supplied based on a signal from a flowmeter G is provided, and an air vent 14, which will be described later and is connected to a casing C of the pump device U, is opened at the top of the nozzle hook S.

In FIG. 2, a casing C of the pump device is provided with a liquid inlet I and an outlet 0.

A check valve 1 is provided at the inner end of the inlet port and opens into a chamber 2 provided with a strainer 2a on the inlet side. A pump 3 is provided approximately in the center of the casing C.

This pump 3 has a suction port 3a and a discharge port 3b, and the discharge port 3b of the pump 3 communicates with a gas-liquid separation device 4. In this gas-liquid separator 4, a liquid path is configured such that the liquid without bubbles flows into a chamber 5 provided with a strainer 5a on the outflow side, and between the strainer chamber 5 on the outflow side and the outflow port 0. is provided with a control valve 6. A bypass valve 12 is provided in a liquid passage 11 of the gas-liquid separation device 4, and this liquid passage 11 communicates with the suction port 3a of the pump 3.

On the other hand, the liquid containing air bubbles in the gas-liquid separator 4 flows through the liquid path 13.
It is designed to flow. This liquid path 13 is formed in the side cover of the casing C. And this liquid path 1
3 communicates with a gas-liquid separation chamber 8, which will be described later. The gas separated in the gas-liquid separation chamber 8 is released into the atmosphere from the air vent 14, and the liquid from which the gas has been separated flows into the liquid path 15. This liquid path 15 communicates with the strainer chamber 2 on the inflow side. A gas outflow control valve 7 is provided in the gas-liquid separation chamber 8 to control the outflow of gas released into the atmosphere from the air vent 14, and a liquid outflow control valve to control the liquid flowing from the liquid path 15 to the strainer chamber 2. 10 are provided.

Therefore, when the pump 3 is rotated by the motor M, the liquid flows from the inlet I through the check valve 1, the strainer chamber 2 on the inflow side, the pump 3, the gas-liquid separator 4, the strainer chamber 5 on the outflow side, and the control valve 6. It is discharged from the outlet O. Further, 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, the gas-liquid separator 4
The liquid containing gas flows into the gas-liquid separation chamber 8, where the gas is discharged from the air vent 14, and the liquid is returned to the strainer chamber 2 on the inflow side.

At this time, the gas outflow control valve 7 of the gas-liquid separation chamber 8 closes when the gas-liquid separation chamber 8 becomes filled with liquid due to an unexpected situation, so that the liquid is not released from the air vent 14. The outflow control valve 10 allows liquid to flow into the liquid path 15 when a certain amount of liquid accumulates in the gas-liquid separation chamber 8.

FIG. 3 shows details of the gas-liquid separation chamber 8. The lid 16 is provided with a passage 14a that communicates with the air vent 14, and this passage 14a ends inside the lid 16 at a downward opening 14b. ing. A gas outflow control valve, generally indicated by the reference numeral 7, is provided to open and close this opening 14b.

The control valve 7 includes a float 21 fixed to a float rod 20 pivotally connected to a mounting portion 16a of the lid body 16, and a valve rod 22 is pivotally connected to the middle of the float rod 20. The upper end of the valve rod 22 is formed into a cone shape, and a bottle 22a protrudes to one side near the upper end. Valve body 30
is formed into a cylindrical shape with a hemispherical upper end, a small diameter valve hole 31 is bored at the tip, and a long hole 32 is bored in one side. The valve rod 22 is loosely inserted into the inner hole of the valve body 30, and the pin 22a is engaged with and guided by the elongated hole 32.

Next is the liquid outflow, which is indicated by the symbol 10! '] The valve is the lid body 1
A float rod 25 is provided which is pivotally connected to a bracket 23 formed integrally with the float rod 6 by means of a pin 24, and a float 26 is attached to the float rod 25.

A valve body 27 is pivotally connected to the float rod 25 via another pin 28 closer to the float 26 than the pin 24 for the pin. This valve body 27 is connected to the opening 15 of the liquid path 15.
It is designed to open and close a.

Therefore, the liquid containing gas flows from the liquid path 13 into the gas-liquid separation chamber 8.
When the gas and liquid flow into the gas-liquid separation chamber 8, the gas and liquid are separated. Then, the gas flows through the valve body 30 at the position shown in the figure.
Air vent 1 passes through upper opening 14b opened by
4 is released 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 shown by the chain line 26a. Then, the valve body 27 opens, and the liquid accumulated in the gas-liquid separation chamber 8 flows out into the liquid path 15 from the opening 15a.

For example, when the gas-liquid separation chamber 8 becomes full of liquid due to some problem such as failure of the liquid outflow control valve 10 or inflow of liquid from another pump device, the float 21 floats to the position shown by the chain line. This causes the float rod 20 to rotate counterclockwise,
The valve rod 22 is raised to close the opening 14b with the valve body 30 to prevent liquid from flowing out.

If the liquid outflow control valve 10 is out of order, the valve will return to normal, and if liquid is flowing in from another pump device, this pump 3 will be driven and the liquid will flow! ! 81 When sea urchins flow out, the liquid level drops. At this time, even if the internal pressure in the room is high, the float rod 20 rotates slightly clockwise due to the weight of the float 21, descends the valve rod 22, and opens the valve hole 31. Gas flows through the small hole 31. 14a and the internal pressure drops to the opening pressure of the valve body 30, the float rod 20 further rotates due to the weight of the float 21, and the bottle 22a engages with the lower edge of the elongated hole 32, pulling down the valve body 3o. Open the valve.

FIG. 4 shows another embodiment of the present invention, in which the valve rod 22a is connected to the float rod 25 of the liquid outflow control valve 10, and the other components are configured in the same manner as in FIG.

[Effects of the Invention] Since the present invention is configured as described above, it produces effects as described below.

That is, since the gas outflow control valve is a two-stage valve made up of a valve rod and a valve body, it can be opened even when the internal pressure is high.

In addition, the gas-liquid separation chamber can be made smaller by making the float smaller and lighter, or by reducing the lever ratio of the float rod, and even if there are bubbles on the liquid surface, the valve can be reliably closed to prevent liquid from blowing out. be able to.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a tank oil tank equipped with a gas-liquid separation chamber in which the present invention is implemented, Fig. 2 is a schematic diagram showing the overall flow of gas and liquid in Fig. 1, and Figs. 3 and 4. 2A and 2B are side sectional views showing different embodiments of the present invention. 7... Gas outflow control valve 8... Gas-liquid separation chamber 1
0...Liquid outflow control valve 22.22a...Valve rod
30... Valve body 31... Valve hole

Claims (1)

[Claims] A gas-liquid separation chamber comprising a gas-mixed liquid inlet, a liquid outflow control valve at the bottom, and a gas outflow control valve opened and closed in two stages by a float at the top.