JPS5950880B2 - Pressure source device using jet pump - Google Patents

Description

Detailed Description of the Invention The present invention relates to a pressure source device using a jet pump, and its purpose is to pressurize or source pressure the inside of a tank with an extremely simple device so that it can be used as a pressure source. Another object of the present invention is to provide an apparatus in which pressure adjustment can be performed simply by adjusting the flow rate.

Conventionally, pressurization has been carried out exclusively using a compressor, a blower fan, etc., but this is uneconomical because the device cannot be used as a pressure source or a pressure reduction source.

The present invention has been made with this in mind, and its gist is to draw out water from a partially filled closed tank, make it high-pressure water, and turn this high-pressure water into high-pressure water. A jet nozzle is used to inject it into the flow path toward the tank of a return pipe with one end as a vacuum connection port, and the product is returned to the sealed tank, using the tank internal pressure as a pressure source and the vacuum connection port as a pressure reduction source. The gist of this paper is a pressure source device using a jet pump, which is characterized by the following.

To explain the present invention in detail with reference to the drawings, reference numeral 1 denotes a closed tank, the inside of which is approximately 1/2 filled with water 2, and baffle plates 4 and 4 that serve to separate gas and liquid in the water and in the empty space 3. ' is placed.

A water supply pipe 6 closed by a valve 5a and a pressurizing passage 8 provided with a check valve 7a are provided above the hermetic tank 1, and these are connected to a pressurizing tank 9.

Further, a drain 10a which can be opened and closed by a valve 5b is provided below the sealed tank 1, and a water drain pipe 11 and a return pipe 12 are respectively exposed from the side wall of the portion filled with water.

The water draw-out pipe 11 and the return pipe 12 are connected by a passage connecting the high-pressure pump 13 and the jet pump 14, and the connection position is in the middle of the return pipe 12.
One end of 2 is connected to a pressure reducing tank 15 via a check valve 7b.

As an example is shown in FIG. 2, the jet pump 14 projects a nozzle 18 into a protection tube 17 to which an atmospheric air introduction tube 16 is attached, aligned with the axis of the protection tube 17, and the protection tube 17 extends into a return tube 12. are connected with their axes aligned.

At the bottom of each of the pressurized tank 9 and the reduced pressure tank 15,
Drain drain 10b opened and closed by valves 5C and 5d,
IOC and valve 5e on the top.

Pressure source connecting pipes 19 and 19' which are opened and closed by 5f are connected.

Incidentally, each of the above tanks is equipped with a pressure gauge, a level meter, etc., but these are not shown.

Further, the atmosphere introduction pipe 16 is opened to the atmosphere via a check valve 7C and a control valve 5g.

3 to 7 show other embodiments, and FIG. 3 is composed of a closed tank 1 and a pressurized tank 9, in which a water draw-out pipe 11 is connected to the bottom, and a return pipe 12 is connected from the top to the closed tank. Main body 1
The other end of the return pipe 12 is not connected to the decompression tank, but is connected to the required low-pressure equipment via the check valve 7b. showing something.

In Fig. 4, the closed tank 1 itself is used as a pressurized tank, the return pipe 12 is passed from above the closed tank 1 into the empty chamber 3, opened at a position close to the water surface, and the other end of the return pipe 12 is reversed. It is configured to be connected to a pressure reducing tank 15 via a stop valve 7b.

FIG. 5 shows an example in which the water draw-out pipe 11 connected to the bottom of the closed tank 1 is used only as a pressurization source.
Connected to jet pump 14 via high pressure pump 13,
This jet pump 14 is connected to the water 2 in a sealed tank 1 at the tip.
The configuration is such that the return pipe 12 opened inward is connected to the rear end of the return pipe 12 so that its axes coincide with each other, and pressurized gas is taken out from the empty space 3 of the closed tank 1.

FIG. 6 shows a case where the jet pump 14 is placed inside the closed tank 1, and the open end of the return pipe 12 opens into the empty chamber 3.
A contact plate 4'' is opposed to this.

One end of the return pipe 12 and one end of the atmosphere introduction pipe 16 are each pulled out to the outside and opened via check valves 7b, 7C, etc.

In FIG. 7, a common tank 20 is installed in parallel with the closed tank 1, and they are connected to each other by a pressurizing passage 8 with a check valve or valve 5e interposed therebetween, and one end of the return pipe 12 is connected to a three-way valve 21 and a common tank 20. A configuration connected via a check valve 7b,
By switching the valve 5e and the three-way valve 21, the common tank 20 can be used as a pressurized tank or a depressurized tank.

Note that the jet pump 14 shown in FIG. 7 is different from the previously described embodiments in that the axes of the protective tube 17 and the return tube 12 intersect.

To explain the operation of the device of the present invention as described above, water in the closed tank 1 is taken out by the water draw-out pipe 11, and this is made into high-pressure water by the high-pressure pump 13 and is jetted into the return pipe 12 from the nozzle 18 of the jet pump 14. By this,
Gas is sucked from one end of the return pipe 12 or from the atmosphere introduction pipe 16, and is introduced into the closed tank 1 together with high-pressure water.

Therefore, the pressure inside the reduced pressure tank on one end side of the return pipe 12 becomes negative, whereas the inside of the empty space 3 of the sealed tank 1 becomes pressurized.

In particular, the configuration in which the nozzle 18 of the jet pump 13 is exposed to the protective cylinder 17 and the atmospheric air introduction pipe 16 is connected to the protective cylinder 17 eliminates the negative pressure formed around the nozzle injection port and inhibits the momentum of the jet stream. Instead, the suction force from the other end of the return pipe is increased and the sucked atmospheric air is forced into the sealed tank.

The pressure can be easily adjusted by adjusting the flow rate.

As described above, by circulating the water in a closed tank partially filled with water, a pressurized source or depressurized source can be easily obtained, so it is an extremely simple device that does not require a separate water supply tank, etc. With this, a pressure source can be obtained.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of the configuration of the device of the present invention, Figure 2 is a detailed diagram of the jet pump section, and Figures 3, 4, 5, 6, and 7 are schematic diagrams of the configuration of other embodiments. be. 1... Sealed tank, 2... Water, 3...
...vacant room, 9...pressurized tank, 11...
... Water withdrawal pipe, 12 ... Return pipe, 13.
... High pressure pump, 14 ... Jet pump, 15 ... Decompression tank, 16 ... Atmospheric introduction pipe, 17 ... Protection tube, 18・・・・・・
Nozzle, 20... Common tank.

Claims (1)

[Claims] 1. Pull out water from a partially filled sealed tank to make it high-pressure water, inject this high-pressure water from a jet nozzle, and pass this injected water through a return pipe whose one end is a depressurization connection port. A pressure source device using a jet pump that is returned to a closed tank and uses the tank internal pressure as a pressurization source and the decompression connection port as a depressurization source.