JPS62191700A - Suction nozzle - Google Patents

Abstract

PURPOSE:To remove snow and/or water easily by connecting an aux. cylinder with one end of a main cylinder with a ring-shaped thin gap interposed, supplying pressurized gas to the outer side of this thin gap, and thereby generating a gas flow oriented from said aux. cylinder to main cylinder. CONSTITUTION:An aux. cylinder 2 is connected with the right end of a main cylinder 1 with a ring-shaped thin gap 3 interposed. The wall surface 31 of thin gap 3 on the main cylinder 1 side shall lead to the inner wall 11 of the main cylinder 1 through mild curvature transient, and the wall surface 32 on the aux. cylinder 2 side shall lead to the inner wall 21 of the aux. cylinder 2 through right angle transition at the point where the first named wall surface 31 begins said mild curvature transient. The other ends 12, 22 of the main and aux. cylinders 1, 2 are left open so as to serve as an exhaust and an intake hole, respectively, for snow and/or water. A gas chamber 4 is provided in such a way as surrounding the main cylinder 1 and put in communication with the outer side of said thin gap 3 through a communication hole 41, and pressurized gas is fed to the outer side of the thin gap 3 from a piping 5 via said communication hole 41. Thereby a gas flow is generated which is oriented from the intake 12 to exhaust hole 22.

Description

[Detailed description of the invention] Purpose of the invention Industrial application! ? This invention can be used in snowy, cold regions, etc.
This invention relates to a suction nozzle that can easily remove fallen snow, melted snow, etc.

Traditional branch techniques Although large-scale snow removal equipment is used to remove snow that has fallen on main roads, manual labor is still required to remove snow that has fallen on paths and roofs. Because of this, the burden on residents in areas with heavy snowfall is a large 1u.Also, it can be dangerous when removing snow from roofs.

Also, if 4i melted water accumulates in lowlands, it will freeze at night and be dangerous, so remove it quickly!9! Unfortunately, at present, the only thing that can be done is sweep it out with a broom.

Problems to be solved by the invention IJ1 is a lightweight and easy-to-handle snow removal/drainage mound.
That is, the purpose is to provide a suction nozzle.

Invention composition problem? In the suction nozzle invented by L.Nariki to solve the problem, an auxiliary cylinder is connected to one end of the main cylinder across an annular slit, and the wall surface of the annular slit on the main cylinder side is curved and smooth. The slit changes to the inner wall of the main cylinder, and the wall surface on the auxiliary cylinder side of the slit changes at a right angle or an acute angle at the position where the wall surface on the r side begins to change smoothly in a curved manner, or at a point L before that point. The main cylinder and the other ends of the auxiliary cylinder are open, and the main cylinder and the auxiliary cylinder are open at the other ends, and have a step for supplying pressurized gas to the outside of the annular slit. It is characterized by

To explain this with reference to Fig. 1, the auxiliary cylinder 2 is connected to the right end of the main cylinder l across a narrow annular slit M (slit) 3, and the wall surface 31 of the annular slit on the main cylinder side has a smooth curve. and moves to the inner wall 11 of the main cylinder l, and the wall surface 3 on the auxiliary cylinder side of the gap.
2 is such that the 1V plane 31 on the -LH side of the slit begins to change smoothly into a curve, or changes at a right angle (or at an acute angle) at a point r before that point and transitions to the inner wall 21 of the auxiliary cylinder 2. It is formed.

The other end 22 of the auxiliary tube is opened and serves as an inlet for snow and water, and the other end 12 of the L tube which is opened serves as an outlet for discharging snow and water.

11 on the auxiliary cylinder side of the slit? When the inner wall 32 changes at a right angle and moves to the inner wall 21 of the auxiliary cylinder 2, the inner wall V of the auxiliary cylinder 2 becomes cylindrical, and the wall surface 32 on the auxiliary cylinder side of the gap changes at an acute angle and becomes the auxiliary cylinder. 2, the inner wall of the auxiliary cylinder 2 has a trumpet shape that opens outward. A trumpet shape is preferable because the suction range is wider, but in that case, as shown in FIG. However, it may then be formed into a trumpet shape that opens outward.

FIGS. 2 and 3 show enlarged views of the slit when the wall surface 32 on the auxiliary cylinder side of the slit changes at right angles. In FIG. 2, the wall surface 31 on the main cylinder side of the slit is curved. This shows the case where the wall surface 32 of the slit on the auxiliary cylinder side changes at a right angle and transitions to the inner wall 21 of the auxiliary cylinder at the position (A) where the slit starts to change smoothly. Formed so that the wall surface 32 on the auxiliary cylinder side of the gap changes at a right angle and transitions to the inner wall 21 of the auxiliary cylinder at a position (CB) before the position (A) where the wall surface 31 on the main cylinder side begins to change smoothly in a curved manner. Indicates the case where

In addition, Fig. 4 shows that at the position where the wall surface on the main cylinder side of the slit begins to curve smoothly, the wall on the auxiliary cylinder side of the slit +ni 32
The figure shows a case in which the angle changes sharply and transitions to the inner wall of the auxiliary cylinder.

The basic idea regarding the structure of this slit exit part is that at the part where the gas flow that has flowed through the slit leaves the slit, one side (auxiliary cylinder side) becomes a free space without walls, and the other side ( The structure is such that there is a continuous wall surface on the main cylinder side).

In such a configuration, the gas flow that has flowed through the slit flows along the continuum 1 as shown by the arrow α in FIG. This characteristic is known as the Coanda effect (ILI).

Any suitable structure can be adopted as a means for supplying pressurized gas to the outside of the annular gap (the outer wall side of the main cylinder 1 and the auxiliary cylinder 2), but as shown in Fig. If a chamber 4 is provided and this gas chamber 4 is communicated with the outside of the slit 3 through the l+ gas communication port 41, gas can be introduced into this gas chamber from the outside through the pressurized gas supply pipe 5. Gas is supplied to the outside of the slit through the communication port 41.

The pressure of the gas fed into the slit is usually 2~l OKg/Cm
Approximately 2G is sufficient.

Although any gas can be used to operate the suction nozzle, air is usually used. You can also consider using other methods such as high-pressure steam.

In order to use this suction nozzle continuously for a long time to remove snow and cold water near freezing point, it is necessary that at least the inner wall surface of the L cylinder is made of fluororesin or organosilicon steel. Delicious.

Of course, the entire structure may be made of 7-, base resin, or organosilicon resin.

This is because the temperature drops particularly at the nozzle where the pressurized gas undergoes heat insulation, so it prevents snow or ice from accumulating on the inner wall of the nozzle during suction work, causing malfunction. It is effective for marketing.

Prevents snow and ice from forming on the inner wall of the nozzle.
As another f-stage for heating the inner wall surface of the main cylinder 1, for example, an electric heater 6 may be placed inside the main cylinder 11 as shown in FIG.

It is ideal if at least the inner wall surface of the 1 mm cylinder is made of fluororesin or organosilicon resin, and furthermore, a means for heating the inner wall surface of the -1-1 cylinder, such as an electric heater, is used.

ft' III When pressurized gas is introduced from the outside to the inside of the slit 3, the gas swirls through the slit at high speed, and at the exit of the slit, the gas curves in a curved line due to the hydrodynamic action known as the Coanda effect. The streamline that slopes toward the L side along the wall surface that changes smoothly (the first
As a result, a negative pressure region is created on the auxiliary cylinder side of the streamline. External air flows into the negative pressure region from the outside (open end) of the auxiliary cylinder, and the motion vector of the gas flow from the slit and the iJ! of the air flow from outside the auxiliary cylinder!
The motion vector is combined to form a gas velocity that advances toward the outlet side of the main cylinder (left side in FIG. 1).

Gas j- moving through the pipe is joined with air l,1 sucked from the outside of the auxiliary cylinder, so gas F, which is sent into the slit,
It is amplified several times more than before.

When the outer open end (right side in Figure 1) of the auxiliary cylinder is brought close to the snow surface or water surface, di and water are sucked into the gas flow and released from the exposed end of the main cylinder.

If you connect a pipe or hose to one end of the main cylinder, you can discharge snow or water to any location.

The transportation distance using the nozzle of the present invention is 30~Lo unless snow or water sticks in the middle of the connected pipe or hose.
om level is easy, and normal snow removal/drainage l] is 1
- minutes. If it is necessary to transport the product over a longer distance, multiple suction nozzles of the final type III may be installed at intervals.

Effects of the invention 1) If the pressurized gas generating means 4 is used, for example, a baby compressor, accumulated snow and accumulated trees can be easily removed, and regular labor is not required.

2) The device is simple and light, so it is easy to handle.1. %.

4. Detailed explanation of U4 Figure 1 is a sectional view for explaining the present invention, Figures 2 and 3 are
1 and 4 are partially enlarged cross-sectional views of the structure near the slit.

Claims (1)

[Claims] 1. An auxiliary cylinder is connected to one end of the main cylinder across an annular slit, and the wall surface of the annular slit on the main cylinder side changes smoothly into a curve to meet the inner wall of the main cylinder. The wall surface on the auxiliary cylinder side of the slit is formed so that it changes at a right angle or an acute angle at a position where the wall surface on the main cylinder side begins to change smoothly into a curve, or at a point before that, and transitions to the inner wall of the auxiliary cylinder. A suction nozzle characterized in that the other ends of the main cylinder and the auxiliary cylinder are open, and further comprising means for supplying pressurized gas to the outside of the annular slit. 2. The suction nozzle according to claim 1, wherein at least the inner wall surface of the main cylinder is made of a fluororesin or an organosilicon resin. 3. The suction nozzle according to claim 1 or 2, comprising means for heating the inner wall surface of the main cylinder.