JPS5999100A - Thrust generating device - Google Patents

Abstract

PURPOSE:To obtain the thrust generating device having a high operating efficiency by a method wherein a suction tube and a transporting tube, having a diameter larger than the suction tube, are connected coaxially and communicated with each other while nozzles for high-pressure liquid and high-pressure gas are opened respectively on the surface of the connecting step of both tubes. CONSTITUTION:The suction tube 1, sucking up a material to be transported, is connected to the transporting tube 2, having the larger diameter than the tube 1, coaxially through a connecting tube 3 and both of the tubes are communicated with each other. The connecting tube 3 is a tapered tubular body and the surface 4 of the tapered connecting step is formed on the internal surface thereof at the connecting part between the suction tube 1 and the transporting tube 2 while the surface 4 is provided the nozzles 5 for the high-pressure liquid and the nozzles 6 for the high-pressure gas respectively. The nozzles 5 are circular small holes and are provided on a circle concentric with the inner diameter surface 7 of the suction tube 1 with equal intervals while the nozzles 6 are flat fan type slits and are provided on a concentric circle having a larger diameter than the circle for the nozzles 5 so as to oppose the nozzles 5 respectively. Both of the nozzles 5, 6 are provided so that the injecting directions of both nozzles are arranged parallel to the central axial line of the suction tube 1.

Description

Detailed Description of the Invention This invention uses a high-pressure gas-liquid two-phase flow as a driving force to suck up and transport liquids such as water and sludge, and solids such as earth, sand, rocks, trees, and grass, or This invention relates to a thrust generating device that propels a ship, etc.

Various devices of this type have existed in the past, and the transport principle is (
a) Sand pumps and slurry pumps using rotation of an impeller, 伽) Diaphragm pumps using reciprocating motion of a diaphragm, (C) Air lift pumps using pressure differences due to air-water mixing, (d) Jet pumps using suction of high-pressure jet water, and ( θ) There are moisture jet pumps that use air-fuel mixture and high-pressure jet water suction.

However, each of these conventional devices has the following drawbacks.

That is, in the case of the device (a), there is a limit to the particle size of the transported object, and the driving impeller itself is subject to wear and tear.

In the case of the device (b), there is a limit on the particle size of the transported object due to the "valve", and the capacity is low and the range of use is narrow. In the case of the device (C)', the pumping force is small and it cannot be used on water.

In the case of the device (d), there is a limit to the particle size of the transported object due to the presence of the "metal part", and cavitation will occur if the pressure of the jet water is increased too much. In the case of the device in (,), high efficiency of the driving force is achieved by eliminating cavitation, but since the center of the driving force is placed on the central axis of the conveying tube, in exchange for this advantage, the above-mentioned conveying tube The transport pipe must be connected to the suction pipe on the front side in a bent manner, which prevents the transported objects from flowing in a straight line and increases the frictional resistance. Furthermore, in the case of the devices (d) and (e), since the driving force is required only from the liquid, the liquid becomes the object to be conveyed after the driving force is combined with the liquid, and an additional driving liquid is required to convey it. There is a disadvantage in that a vicious cycle occurs, and the flow velocity decreases in the vicinity of the inner wall due to frictional resistance with the inner wall of the conveying pipe, and the jet flow velocity at the central axis is also affected.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a thrust generating device that is highly versatile and has extremely high operating efficiency. Therefore, the key feature of the present invention is that a suction pipe and a conveying pipe having a larger diameter than the suction pipe are connected and communicated on the same central axis, and a high-pressure liquid is provided on the connecting step surface of both pipes. An injection port and a high-pressure gas injection port are each opened, and the positions of the injection ports are concentric with the inner diameter circle of the suction pipe, and the high-pressure gas injection port is set higher than the still-pressure liquid injection port. It is located on the large diameter side, and the injection direction of both the injection ports is parallel to the central axis.

Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings.

In FIGS. 1 and 2, (1) is a suction pipe for sucking up objects to be transported;
1) Larger diameter conveyance* (2) is connected and communicated on the same central axis via the connecting tube (3).

The connecting tube (3) is a tapered tube, and the connecting tube (3) is a tapered tube.
The inner surface of the pipe forms a tapered connecting step surface (4) at the joint between the suction pipe (1) and the conveying pipe (2). A high-pressure liquid injection port (5) and a high-pressure gas injection port (6) are respectively opened in the connection step surface (4).

The injection port (5) for high-pressure liquid is a small hole with a planar circular shape shown in FIG. A plurality of them are arranged at equal intervals on the top. Further, as shown in Fig. 2, the high-pressure gas injection port (6) is a planar fan-shaped slit hole, and the injection port (6) has a larger diameter than the high-pressure liquid injection port (5). A high-pressure liquid injection port (5) is located concentrically with the inner diameter circle on the side.
. . . and the same number of them are arranged in correspondence with each other. υ1 nochi, 1☆ injection port for high-pressure liquid (5)... and injection port for high-pressure gas (6)
)...They are arranged so that they are respectively positioned correspondingly on the same radial line from the center of the above concentric circles.

(3) is a high-pressure liquid supply pipe for supplying high-pressure liquid, such as water, from a liquid supply source (not shown) into the conveying pipe (2),
The supply pipe (8) communicates via an annular communication pipe 00 with all the injection nozzles (9), which are respectively opened in communication with the high-pressure liquid injection D(5). 0υ is the injection nozzle (9
) is the communication port of the annular communication pipe 0 (υ).
The injection nozzle (9) is set and arranged so that its central axis is parallel to the same central axis of the suction pipe (1) and the conveying pipe (2). 9
)... will be injected in parallel to the central axis through the injection ports (5)...

A'4 is a high-pressure gas supply pipe for supplying high-pressure gas, such as air, from a gas supply source (not shown) into the conveying pipe (2), and the supply pipe is connected to a high-pressure gas injection port (6). ...to each? All of the injection nozzles α4 that open 1ff7 communicate with each other through an annular communication pipe (14). Q51 is a communication port of an annular communication pipe 0 which opens into the injection nozzle (I3...).

Incidentally, the injection nozzle (14...) is set and arranged so that its central axis is parallel to the same central axis as described above, similar to the above-mentioned injection nozzle (9) for high-pressure liquid. The high-pressure air supplied from the supply pipe a to the injection nozzles u4 is injected through the injection ports (6) parallel to the central axis.

Therefore, the high pressure liquid supply pipe (8) and the high pressure gas supply pipe (1
High-pressure water and high-pressure air are simultaneously conveyed through the pipes (2
), these high-pressure water and high-pressure air form a high-pressure gas-liquid two-phase flow and exert an extremely high driving force. That is, between the approximately cylindrical jet flow layer formed by the high-pressure water injected from the injection ports (5) and the inner diameter surface of the conveying pipe (2), the water from the injection ports (6)... Since there is a jet flow layer in the approximately cylindrical IIj' formed by the injected high-pressure air, the high-pressure water has the effect as if it were being injected into a cylinder traveling at high speed in the direction of the injection. Not only is there no frictional resistance like that which occurs in a stopped cylinder, but due to the synergistic effect with the negative pressure (suction direction) generated by the actual delivery of the high-pressure air in the conveying pipe (2), the high-pressure water is The jet stream maintains the initial velocity at the time of injection, rather increasing speed, and actually runs inside the conveying pipe (2), creating an extremely large negative pressure (suction blade) inside the jet stream layer. .

Next, the operation of the thrust generating device configured as described above will be explained.

For example, the device can be used with liquids such as water, sludge, etc., earth, sand, rocks, etc.
When used as a suction pump to suck up and transport solid objects such as trees and grass, the above-mentioned The object to be conveyed is conveyed at high speed within the suction pipe (1) and within a substantially cylindrical jetted flow layer formed by high-pressure water without receiving any resistance.

Further, for example, when the device is used as a propulsion device for a ship's hull, etc., when the suction pipe (1) is submerged in water, the water sucked up as a transported object is mixed with the high-pressure gas-liquid two-phase flow. When the vessel actually travels inside the conveyor pipe (2), the reaction force causes the above-mentioned hull to gain propulsion, and when the water is in the suction pipe (1), the air that is sucked in also -Propulsion force can be obtained through reaction with the high-pressure gas-liquid two-phase flow during actual running.

FIG. 6 shows a second embodiment of the present invention, in which the high-pressure gas injection port (6) has a planar ring shape.

Along with this change, the injection nozzle (13) is also formed into an annular shape, eliminating the need for the aforementioned annular connection pipe (14).
Other configurations and effects are the same as in the first embodiment.

If the shape of the high-pressure gas injection port (6) is set as in this embodiment, the high-pressure air injected from the injection port (6) will form a complete cylindrical jet flow layer, as described above. The effect of high-pressure gas-liquid two-phase flow becomes more pronounced.

It should be noted that the present invention is of course not limited to the above-described embodiments, and is open to various design changes. For example, high-pressure liquid injection port (5)... and high-pressure gas injection port (6)...
As long as the shape, location, number, etc. of the two have the same function,
It can be changed depending on the purpose (application, usage capacity, etc.), and the high pressure liquid injection port (5) can be moved closer to the inner diameter side to reduce the high pressure from the injection port (5). It is also preferable that the inner diameter of the cylindrical jet layer formed by water is approximately the same as the inner diameter of the suction pipe (1). Further, in accordance with the above changes, the shape and number of the injection nozzles (9) and the supply pipes (8) C2 can also be changed. especially,
For large-sized products that require extremely large driving force, each injection nozzle (9) (9) 03... has an independent structure, and each injection nozzle (9) (13...K) has a corresponding number of supply pipes ( 8) Arrange C1 in a corresponding manner, and also make the connections between each supply pipe (8) u''2I and the injection nozzle (9) μ■ and the injection port (5) (6) the same. If it is carried out on the central axis and parallel to the same central axis of the suction pipe (1) and the conveying pipe (2), the energy loss in these flow paths can be extremely reduced. A large desired driving force can be obtained. It is also preferable to attach a means for preventing cavitation, such as an air introduction pipe, to the nozzle (9).

Further, the liquid and gas used are not limited to water and air, respectively, and can be changed as long as they have the same function. Further, the shape of the connecting step surface (4) is not limited to the tapered shape shown in the illustrated example. Of course, it is also possible to use only a high-pressure jet stream of only high-pressure liquid or only high-pressure gas.

The present invention has the configuration as described in detail above, and has effectively achieved its intended purpose. In particular, the suction pipe (1) and the suction pipe (1)
Since the conveyor pipe (2) with a larger diameter than the conveyor tube (2) is connected and communicated on the same central axis, the conveyed object can flow in a straight line, so there is no unnecessary frictional resistance that occurs at bends. , Gokugiku enables efficient transportation. In addition, the above straight pipe (1
) (2) connection stage direction (4) K high pressure liquid injection port (5
)... and high-pressure gas injection 1] (6)... are opened respectively, and both injection ports (5) and (6)... are placed on a concentric circle with the inner diameter circle of the two pipes (1). In addition, the high-pressure gas injection port (6)... is arranged in the high-pressure liquid injection port (5).
..., and furthermore, these injection ports (5
) (6) Since the injection direction of... is parallel to the same central axis of the suction pipe (1) and the conveying pipe (2), there is no obstruction of the conveyed object in the conveying pipe (2). There is no such thing, and if it is up to the inner diameter of the suction pipe (1), suction and conveyance is possible.

In addition, since the objects to be conveyed are conveyed inside a substantially cylindrical or cylindrical jet flow layer formed by high-pressure liquid, a vicious cycle occurs in which the high-pressure liquid becomes the object to be conveyed and reduces the conveyance capacity. Unfortunately, a jet layer of high-pressure gas is formed between the jet layer of the interpressure liquid and the inner diameter surface of the conveying pipe (2), so the high-pressure liquid encounters no resistance. Not only is it not affected by the above-mentioned high-pressure gas, but due to the synergistic effect of the high-pressure gas-liquid two-phase flow with the above-mentioned high-pressure gas, an extremely large driving force can be exerted. In addition, its range of use is extremely versatile, regardless of whether it is underwater or above water.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of side 1 of an embodiment of the present invention, and FIG. 2 is a sectional view of side 1 taken along line X--X in FIG. The sealed view and FIG. 6 are sectional views showing the second embodiment and corresponding to FIG. 2. (1)... Suction pipe, (2)... Conveyance pipe, (4)...
・Connection step surface, (5)... High-pressure liquid injection port, (6)
...High-pressure gas injection port. Patent applicant Toshiaki Kezuka

Claims (1)

[Claims] / A suction pipe (1) and a conveying pipe (2) having a larger diameter than the suction pipe (1) are connected and communicated on the same central axis, and both pipes (1)
There is a high-pressure liquid injection port (5) in the direction of the connection stage (4) of (2).
. . . and high-pressure gas injection ports (6) . The high pressure gas injection ports (6) are concentric with the high pressure liquid injection ports (5)...
, and both injection ports (51(6)
A thrust generator @ characterized in that the injection direction of... is parallel to the central axis.