JPH1164580A - Air push-out liquid transfer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of bubbles or a two-phase liquid flow and surely and efficiently transfer a liquid by providing a jet flow energy dissipating member in opposition to the air inlet of a pumping chamber. SOLUTION: A pumping chamber 40 is formed of a vertical cylindrical part 41 and a funnel-like connecting part 43, and a liquid outlet 43a is connected to a driving liquid pipe. A jet flow energy dissipating plate 47 is mounted in opposition to an air inlet 45a. When an opening and closing valve is opened, and a release valve is closed in the compressing process of the pumping chamber 40, high-pressure air is carried thereto to push up the level of a driving liquid 23, and the driving liquid 23 is pushed into the driving liquid tube through the liquid outlet 43a. When the level reduction of the driving liquid 23 within the pumping chamber 40 reaches a prescribed value, the opening and closing valve is closed, and the release valve is opened to charge the driving liquid 23. In the compression process, since the air flow injected into the pumping chamber 40 is collided to the jet flow energy dissipating plate 47 and shifted sideways, it never rushes into the driving liquid 23, and no bubble is generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for transferring a corrosive or radioactive solution such as a solution in a nuclear fuel reprocessing facility, and more particularly to a structure of a pumping chamber used therein.

[0002]

2. Description of the Related Art When a strongly corrosive liquid or a radioactive liquid is transferred, a jet pump has no moving parts, and therefore does not require much repair or the like. For example, FIG. 6 shows a system of a device for transferring liquid in a nuclear fuel reprocessing facility. In this liquid transfer device, a supply liquid tank 1 is connected to a liquid supply pipe 5 via a reverse flow diverter 3. The internal solution 9 is sent to the liquid receiving tank 7 by the reverse flow diverter 3. The driving power is provided by a pumping chamber 13 which communicates with the reverse flow diverter 3 via a driving liquid pipe 11, which is supplied through an air supply pipe 19 provided with an on-off valve 15 and a relief valve 17. Contact To explain the liquid transfer principle, if the relief valve 17 is closed and the on-off valve 15 is opened,
Compressed air enters the pumping chamber 13 from the air supply pipe 19 and pushes down the driving liquid 13 inside. As a result, the driving liquid passes through a reverse flow diverter 3 which is a kind of a jet pump, and at that time, flows at a high speed. The high-speed flow of the driving fluid
The solution 9 inside the supply liquid tank 1 is sucked, and is sucked into the liquid receiving tank 7.
Send to Next, when the on-off valve 15 is closed and the relief valve 17 is opened, the air in the pumping chamber 13 is released, and the level of the driving liquid in the pumping chamber 13 and the air supply pipe 19 is restored. If the opening and closing of the on-off valve 15 and the relief valve 17 are sequentially repeated, the driving liquid 23 reciprocates in the driving liquid pipe 11, and the solution 9 is transferred from the supply liquid tank 1 to the liquid receiving tank 7.

[0003]

As described above, the driving liquid 23 in the pumping chamber 13 is driven downward by the air from the compressed air source 21.
When the liquid therein is pushed into the pumping chamber 13, air is pushed into the driving liquid 23 as shown in FIG. 7 to generate air bubbles. Then, the driving liquid 23 containing these air bubbles enters the driving liquid pipe 11 as a gas-liquid two-phase flow as shown in FIG. 8 and passes through the reverse flow diverter 3.
In such a situation, the pressure loss in the reverse flow diverter 3 becomes large, and there is a possibility that the liquid sending function is lost. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an air extruding type liquid transfer device in which a liquid sending function of a reverse flow diverter 3 which is a kind of pump is not impaired. An object of the present invention is to provide a pumping chamber for a liquid transfer device.

[0004]

According to the present invention, there is provided a driving liquid pipe connected to a supply liquid tank via a reverse flow diverter, and an opening extending from the reverse flow diverter to the liquid receiving tank. In an air-extrusion type liquid transfer device having a pumping chamber provided intermittently to receive compressed air provided at an inlet of the liquid sending pipe and the driving liquid pipe, the pumping chamber has a jet flow reducing member opposed to the air inlet. It is characterized by being provided inside.
Further, according to the present invention, the distal end of the air introduction pipe connected to the pumping chamber extends into the interior thereof and is opened upward.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to the accompanying drawings. The same parts are denoted by the same reference numerals throughout the drawings, including the drawings related to the above-mentioned conventional one. First, the overall system of the liquid transfer device 30 according to the present invention will be described with reference to FIG. In this figure, a supply liquid tank 1 containing a solution 9 to be transferred inside is connected to a liquid sending pipe 5 via a reverse flow diverter 3,
The outlet of the liquid sending pipe 5 is opened in a liquid receiving tank 7 located relatively above the supply liquid tank 1. On the other hand, the driving liquid pipe 1 connected to the reverse flow diverter 3 so as to face the liquid feeding pipe 5
1 communicates with the characteristic pumping chamber 40 of the present invention. Although the details of the pumping chamber 40 will be described later, the air supply pipe 19 connected to the upper end thereof includes an on-off valve 15 and a relief valve 17, and the on-off valve 15 side communicates with the compressed air source 21, and the relief valve 17 side communicates with the atmosphere. It is open.

Next, the detailed structure of the pumping chamber 40 will be described with reference to FIGS. 1 and 2, the pumping chamber 40 includes an upright cylindrical portion 41 and a funnel-shaped connecting portion 43, and a liquid outlet 43 at the tip of the connecting portion 43.
a is connected to the driving liquid pipe 11. Also, the upright cylindrical portion 41
An air inlet 45a connected to the air supply pipe 19
Is formed, and a jet flow reducing plate 47 is attached to the air inlet 45 a via a support column 49. As is clear from the figure, the jet flow attenuating plate 4
The periphery of 7 and the lower surface of the top plate 45 are sufficiently spaced so as not to prevent the outflow of air.

The operation of the liquid transfer device 30 having the above-described structure will be described. In the compression step of the pumping chamber 40, the on-off valve 15 is opened and the relief valve 17 is closed. In this case, the high-pressure air from the compressed air source 21 flows in through the on-off valve 15 and pushes down the liquid surface of the driving liquid 23 in the air supply pipe 19, and finally pumps as shown in FIG. A free liquid surface of the driving liquid 23 is formed in the chamber 40, and this is further depressed. In this way, the driving liquid 23 in the pumping chamber 40 is pushed out into the driving liquid pipe 11 through the liquid outlet 43a, and flows into the liquid feeding pipe 5 through the driving liquid pipe 11 and the reverse flow diverter 3. I do.
The reverse flow diverter 3 is a kind of jet pump and has a throttle formed therein, so that the driving liquid 23 flowing therethrough becomes a high-speed flow and reduces the static pressure. For this reason, the solution 9 in the supply liquid tank 1 is involved and flows into the liquid supply pipe 5,
Together, they are transferred to the liquid receiving tank 7. Note that the driving liquid 23 and the solution 9 to be transferred are componentally the same, and are merely distinguished in terms of function. Pumping chamber 40
When the liquid level of the driving liquid 23 in the inside reaches a predetermined value, the process proceeds to the pressure reducing step. In the pressure reducing step, the on-off valve 15 is closed and the relief valve 17 is opened. Therefore, the liquid level of the driving liquid 23 returns from the pressure balance, but at this time, the supply liquid tank 1
A part of the solution 9 in the inside is charged into the pumping chamber 40 through the driving liquid pipe 11 to become the driving liquid 23. In the above-described compression step, the air flow ejected from the air supply pipe 19 to the pumping chamber 40 collides with the ejected flow energy reducing plate 47 as shown in FIG. Does not penetrate inside and therefore does not generate bubbles.

In the pumping chamber 40 described above,
The jet flow attenuating plate 47 is provided so as to face the air inlet. However, as in a pumping chamber 140 shown in FIGS. 5 and 6, an inlet connection pipe 147 is provided in an upright cylindrical portion 141 in an airtight manner, and the outlet thereof is connected to the outlet. You may make it oppose the lower surface of the top plate 145. The inlet of the introduction connection pipe 147 is connected to a pipe similar to the air supply pipe 19. In this case, the introduction connection pipe 1
The air jetted from 47 hits the top plate 145 and is deenergized, and an undisturbed liquid surface of the driving liquid is formed.

[0009]

As described above, according to the present invention,
In the pumping chamber of the air extrusion type liquid transfer device,
A jet flow damping member is provided opposite to the compressed air inlet to prevent the compressed air from entering the driving liquid, thereby preventing the generation of bubbles or a two-phase liquid flow and reliably and efficiently transferring the liquid. Can be.

[Brief description of the drawings]

FIG. 1 is a partially cutaway elevation view showing a main part of an embodiment of the present invention.

FIG. 2 is a top view corresponding to FIG.

FIG. 3 is a system diagram of a liquid transfer device according to the embodiment.

FIG. 4 is a partially cutaway elevation view showing a main part of a modified embodiment in which a part of the embodiment is modified.

FIG. 5 is a top view corresponding to FIG. 4;

FIG. 6 is a system diagram of a conventional liquid transfer device.

FIG. 7 is an operation explanatory view for explaining a conventional problem.

FIG. 8 is an operation explanatory diagram for explaining a conventional problem.

[Explanation of symbols]

 Reference Signs List 1 supply liquid tank 3 reverse flow diverter 5 liquid supply pipe 7 liquid reception tank 11 drive liquid pipe 15 on-off valve 17 relief valve 19 air supply pipe 21 compressed air source 30 liquid transfer device 40 pumping chamber 41 upright cylindrical part 43 connecting part 43a liquid Outlet 45 Top plate 45a Air inlet 47 Ejection flow attenuating plate 49 Support column 140 Pumping chamber 141 Upright cylindrical portion 143 Connecting portion 143a Liquid outlet 145 Top plate 147 Introducing connection pipe

Claims (2)

[Claims] 1. A driving liquid pipe connected to a supply liquid tank via a reverse flow diverter, a liquid feed pipe extending from the reverse flow diverter and opening to a liquid receiving tank, and compressed air provided at an inlet of the driving liquid pipe. An air-extrusion type liquid transfer device having an intermittently-pumped pumping chamber, wherein the pumping chamber includes a jet-flow-attenuating member inside the air-exhaust member facing the air inlet. 2. A driving liquid pipe connected to a supply liquid tank via a reverse flow diverter, a liquid feeding pipe extending from the reverse flow diverter and opening to a liquid receiving tank, and a compressed air provided at an inlet of the driving liquid pipe. An air extruding liquid transfer device having a pumping chamber for intermittently receiving, wherein a tip of an air introduction pipe connected to the pumping chamber extends into the pumping chamber and is opened upward. Liquid transfer device.