JPS59202000A - Liquid injection mixture gas type suction device - Google Patents

Abstract

PURPOSE:To facilitate starting without considerable dropping of injection flow speed by injecting fluid through a fluid lead-in tube with higher speed than the liquid injection flow when starting. CONSTITUTION:A fluid feed-in tube such as an air feed tube 15 is provided at the core section of a liquid injection tube 14 while coaxially with said tube 14 such that the leading edge will project from the leading edge of said tube 14. The air injection flow B will inject in front of the delivery tube with higher speed than the liquid injection flow A'. The liquid contacting with said flow B will increase the speed to increase the dynamic pressure at the liquid side while to drop the static pressure and the air injection flow B will decrease the speed to increase the static pressure which will be higher than the static pressure of air. Consequently the air will push the liquid outward to product gas/liquid mixture ambient thus to realize quick starting easily.

Description

Detailed Description of the Invention Technical Field The present invention relates to suction that utilizes suction targets such as fluids such as gases and liquids, solids such as powder or granules, or solids mixed in the fluid. Type ti'! Regarding "suction" used in jet pumps, vacuum pumps, compression, etc.

In general, when a liquid jet is injected into a liquid <1il-r, a vortex of the liquid is generated near the outlet of the injection pipe, and the flow velocity of the jet is greatly reduced. It is known that there is a current φ in which the loss of energy increases and the suction force of the jet to attract foreign objects decreases.

As a solution to all the above conventional problems,
Publication No. 2682i provides a mixed liquid suction device.

FIG. 1 shows this moisture suction device for liquids. J!,
] Preventing the generation of vortices in a part of the IC at the exit of the tube 4'ff: Characteristic. In more detail,
In the figure, 2 is a discharge pipe, a suction pipe 1 is connected to a predetermined location on the side wall of the discharge pipe 2, and one liquid injection pipe 4 is connected to the rear end wall 2b of the suction pipe connection part of the discharge pipe 2. At the same time, the air introduction pipe 3 is connected to the rear end side wall 21, and the liquid, that is, the jet A is directed forward from the liquid ejection pipe 4 to the discharge pipe 20, and the air is passed through the air introduction pipe 3. By injecting while inhaling, the object to be attracted is suctioned from the suction pipe 1 and transported forward to the discharge pipe 2 with kinetic energy, that is, thrust J corresponding to the velocity of the liquid jet.

In this configuration, the air taken in from the air introduction pipe 3 wraps around the jet jet injected from the liquid jet pipe 4, and as a result, almost no vortex is generated at the outlet of the liquid jet pipe 4. If this does not occur and the jet stream 7~ has an extreme velocity of 1°C, the jet stream A will be ejected toward the front of the discharge pipe 2 with extremely large kinetic energy.

Although the above-mentioned improved suction device achieves its purpose within minutes during steady operation and is very excellent, it has a major problem when starting up.

That is, in order to start this suction/placement, it is necessary to generate a negative pressure sufficient to suction the object to be suctioned at the outlet portion 1a of the suction tube 1. However, in the above-mentioned improved suction device, introducing air through the air introduction pipe 3 is itself contrary to the negative pressure generation condition, and the jet flow A is sufficient to remove the air from the outside to counteract this condition. need to be cleaned. However, as a result of jet A being surrounded by an air layer,
Since the jet stream A flows through the discharge pipe 2 as a single flux without being distorted over a long distance, it is difficult for spray-like water droplets or scattered water droplets to occur within the discharge pipe 2. A thick air layer exists between the jet stream A and the wall surface of the discharge pipe 2 over a long distance of the discharge pipe 2, and therefore a situation occurs in which sufficient negative pressure is not generated at the outlet portion 1a of the suction pipe 1. Therefore, in this improved suction device, it becomes difficult or very difficult to operate, and it is necessary to use a so-called "priming water".

In order to eliminate the problem between the above-mentioned improved suction devices, an annular protuberance 6 is provided at a predetermined location within the discharge pipe 2 (:1Y), as shown by the dashed line in FIG. Fountain 1A
-1 An improved proposal is provided in which an annular raised portion 5 is formed on the inner wall near the outlet of the tube 4. By forming such an annular ridge 5 or 6, the fluid guided to the outlet of the liquid 1 column IA, J pipe 4 collides with and is disturbed by the annular ridge + I'' 4 part 5 (() 4, or the jet stream A jetted from the liquid pipe 4 collides with the annular protrusion 6 in the discharge pipe 2. Spout-like water droplets and scattered water droplets are generated around the pipe. Therefore, the inside of the discharge pipe 2 is filled with the jet flow A, spray-like water droplets, and scattered water droplets, etc., which generates a strong fluid suction force, and the suction 1'1 sufficient for the outlet 1a of the tube 1
There are many ways to gain pressure.

However, although the above improvement plan achieves the purpose of starting the suction device without any problem, the jet flow A receives a large resistance from the annular protuberance 5 or 6, and its flow velocity decreases, and its kinetic energy decreases. This results in a large loss, which defeats the original purpose of the liquid injection air-fuel mixture suction device.

OBJECTS OF THE INVENTION Accordingly, an object of the present invention is to provide a liquid injection mixture suction device that can be easily started without any problems, without impairing the original purpose of the liquid injection mixed air suction device, which is to prevent a significant decrease in jet velocity and maintain kinetic energy. The goal is to be able to do this.

Structure, operation, and effects of the invention In order to achieve the above object, the present invention was constructed as follows.

That is, a fluid introduction pipe is provided at the internal axis of the liquid injection pipe connected to the rear end wall of the suction pipe connection part of the discharge pipe,
At the time of discharge, a fluid such as a gas such as air or a liquid is injected from the fluid introduction pipe at high speed as well as the liquid jet jetted from the liquid injection pipe, and the liquid jet is spread out and sprayed on the discharge pipe wall surface. When the gas is exposed to the air, atomized droplets and scattered droplets are present in the gas inside the discharge pipe.
A'jl blasphemy so as to generate 8 Qi/Buddha in the above composition)=・l Hate 1 is from liquid jet 1a, J tube:
By colliding with one jet of injected liquid and mixing with the liquid or gas, the gas-liquid contact area increases, and the air in the discharge pipe and It is possible to strongly suction the dregs, generate sufficient negative pressure at the exit part of the suction tube, and achieve the above-mentioned L1 goal by smoothly performing the starting (Samurai's suction action). can do.

Furthermore, according to the configuration described in J-, the exit of the suction tube [-north
Since it is possible to generate a gas-liquid mixed atmosphere near the loaf, the length of the 11-pronged eyebrows' can be relatively small, and therefore the suction I-mugi 11°'1'' itself can be miniaturized.

Also, 1! Since there are no obstacles in the J1 pipe, there is no loss of energy due to obstacles, and kinetic energy is
II (J1-could be supported.

Example Below, examples of firearms of the present invention will be explained in detail.

The first embodiment will be explained based on FIG. 2.

The schematic structure of the suction device according to the first embodiment is shown in FIG. 1. From the surface of the conventional example, in FIGS.
1 is the discharge pipe 12; 11 wall predetermined f; ji, 'i'〒
13 is a gas introduction pipe connected to the rear side wall 12a of the suction pipe connecting portion of the discharge pipe 12.

Air may be introduced into this gas introduction pipe 13 as in the conventional example described above, or another gas such as steam may be introduced 1-. As clearly shown in FIG. 2, in this embodiment, a liquid jet pipe 14 is connected to the rear end g1 of the discharge pipe 12. This 7'υ-body jet tube 14 has a structure such as a water jet A''ti: l exit tube axial direction l'
Lend one to the liJ side. -1: / B, liquid / [tributary +4.1';'414 In the center of the tube and coaxially with the liquid injection tube 14, there is a fluid introduction tube, that is, an air center in the case of a firearm.
It・15・、The tip of the tube 1" is τ nocturnal jet j1. The tip of pipe 1-1 of pipe 14 is rusted, provided so as to protrude from 1, and is empty.
X jet stream B 7&, body] 1〆1 stream 8' higher speed and discharge 'ij, ', '! III force direction [) l in one direction
put out As a result of this, the liquid jet A' is ejected with an annular cross section.

As mentioned above, the air jet I3 ejected approximately at the center of the liquid jet A' has a faster flow velocity than the liquid jet A', so the speed of the liquid in contact with the air jet B increases and the dynamic pressure on the liquid side increases. As the static pressure decreases, the air jet (AゎI((rf
lIH rises and the i purifier increases, and the liquid i As ♂1'-■ becomes unstable and enters a mixed state, the force body is pushed outward from the middle and b sides by the difference in static pressure between air and liquid. In particular, the liquid collides with the wall surface and creates a liquid mixed atmosphere in the discharge pipe, i.e., a state in which water droplets and splashed water are mixed in the air.
Full, 'H: 1 to cause lW, therefore 3'! When the body is exposed, the pressure difference is used to spread it to the surface side.
In case of doing so, liquid jet → i from the tip of pipe 11 of pipe I4.
lJ exit'RAj, (the distance to the collision with the surface 1s:l!l',+'l1tlik can be shortened').

It's ox, the above liquid jet Δl or Ill,, fi, I'm angry・1
I'm at a position one block away from the second wall La1.
I! , :The flow rate of the liquid jet A' from 1'i # 14 to 1111? i,' determined by Yoko Kan's =J-method design in 12',? And this one city j
It is preferable that the protrusion b'L position 1 is drawn so that it is located near the outlet 1 part 11-1 of the suction tube 11.

2, a gas-liquid mixed atmosphere C is generated and filled in the vicinity of the outlet 11a of the suction '1f11, and advances toward the discharge pipe itself, causing the suction fluid, which is the suction r1 in the suction pipe 11, to flow through the suction pipe 11. The liquid is sucked and the suction fluid is transported toward the discharge pipe 121jiJ by the thrust of the liquid jet 8'. Therefore, the device can be started up quickly and easily.

Note that after startup, the jet of steam from the air introduction pipe 15 η, 1
Either stop the air flow or introduce atmospheric air.

The suction device having the above structure can suitably be applied to a jet pump, a vacuum pump, or a fluid compressor. In addition, if one vacuum pump or compressor other than air is used, it is sufficient to introduce an appropriate suction or gas from the gas pipe 13.

”What is the example of blood in Nikiten I? X'7 body introduction bone introduction tube air core included]
4: I have explained the case where ' is used, but instead of the air core tube, a liquid core tube is provided to eject the liquid v's flow 13', and this liquid'', 'j 1Ilj '3
' may become a part of the liquid jet A' which is emitted from the liquid jets a and j pipes, thereby increasing the non-kinetic energy of the liquid qE flow A'.

Next, a second embodiment will be described with reference to FIG.

The difference from the first embodiment is that the inner wall surface of the tube opening tip 14a of the liquid jet qζ tube 14 is a tapered surface that widens toward the end, and the 4' and HY of the tube opening tip 15a of 15
+Mik It is a tapered surface that widens at the end.

As a result, compared to the first actual gun example, the liquid jet A' is 1iJ of liquid 12. At a shorter distance from the tip of the I pipe 14, the discharge pipe λ1. II on the Y side? However, the length of the discharge pipe can be made shorter.

In any of the b(1) examples, the desired 1-1 goal can be achieved with the above configuration.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of a liquid jet equalization according to a conventional example, a vertical cross-sectional view of a mixed air suction tube, and Fig. 2 is a liquid jet according to an embodiment of the present invention.
'! IM *j, vertical cross-sectional view of type suction 1iii, 3rd
The figure is a vertical cross-sectional view of the suction, 1 & position according to the embodiment of the song. 11. Suction pipe, 12. Discharge pipe, 13. Waste core entry i
i'Q;, 14...Liquid 1 separate tube, 15...Air introduction compensation.

Claims (1)

[Claims] (1) Connect a suction pipe to the side wall of the discharge pipe, connect a liquid jet pipe to the rear end wall of the suction pipe connection part of the discharge pipe, and connect the gas [phase] pipe to the rear side wall of the discharge pipe. ] Connect the immigration bureau,
Liquid BJY N, 1. By directing the liquid toward the front of the discharge pipe and injecting the gas while inhaling the gas from the gas introduction pipe, the object to be sucked is sucked from above and in front of the Suction that was made to be pumped to?
〉A ((In the above-mentioned liquid jet)],] a fluid introduction pipe is provided in the 8th part of the pipe inner tube,
At the time of startup, a liquid jet is ejected from the liquid injection pipe η,j, and at the same time, fluid is ejected from the fluid introduction pipe at a faster speed than the liquid jet, so that the liquid jet is ejected in a divergent manner. A liquid jet mixture suction device (:2, liquid jet mixture according to claim 1) characterized by a gas-liquid mixed atmosphere in the discharge pipe by colliding with a wall surface. In the pneumatic suction device, the inner wall surface of the mouth of the single liquid injection pipe is formed into a tapered shape that widens towards the end, and the outer wall surface of the mouth of the fluid introduction pipe is formed into a tapered shape that spreads towards the end. Special air mixture suction.