JPH11270799A - Fluid injector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction type transport system that carries transport materials such as spray reliably without causing clogs and backflows in its transport pipe. SOLUTION: An air injector 10A comprises an internal cylinder 11 and an external cylinder 12 placed in opposition to each other at their taper faces tapering in the transport direction. A ringlike space 5 is defined between the internal cylinder 11 and the external cylinder 12 on the upstream end in the transport direction to receive pressure fluid supplied, and the internal cylinder taper face is formed thereon with spiral passages that connect the ringlike space 5 down to the tip 11b of the internal cylinder 11, so that the pressure fluid is jetted spirally along the interior surface of a transport pipe 2B as streams t-A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid ejecting apparatus which is mounted on a transport pipe used in a fluid transport apparatus for transporting an object using compressed air or other pressure fluid, and in which a pressure fluid is jetted into the transport pipe. Related to the device.

[0002]

2. Description of the Related Art As an object to be transported using a pressure fluid, for example, there is a spray material such as a spraying method. Conventionally,
The suction transport of the sprayed material by the transport pipe is performed by interposing a so-called "air ring" in the middle of the transport pipe or providing a Y-shaped pipe, and the compressed air, liquid, In this case, a mixture of air and a liquid is ejected.

Here, the conventional air ring system is shown in FIG.
As shown in the schematic diagram of FIG. 1, from the internal space 5 of the air ring 10 interposed in the transport pipe 1,
The air A was blown toward the center of the transport pipe 1 in the traveling direction, and the transport material Z was transported. For example, in the case of dry concrete spraying, a nozzle (not shown in FIG. 7) provided at the end of the transport pipe 1 is provided near the tip of the transport pipe 1 for the purpose of adding water or a quick setting agent and mixing and stirring. An air (water) ring was attached.

FIG. 9 shows an example of an apparatus for transporting greening materials cut by a greening material cutting and spreading machine. Hose 2
A transport pipe 1 provided with air rings 10 to which air is supplied at 5 at three places is connected to one end of a cutting machine 20. At the tip of the transport pipe 1, an erosion inhibitor is supplied with a hose 26.
Supplied in. The greening material is fed into the other end of the cutting machine 20 by the upper roller 21 and the lower roller 22, and is cut by the fixed blade 23 and the rotary blade 24,
It is sucked into the transport pipe 1, mixed with the erosion inhibitor at the tip of the transport pipe, and sprayed.

In the example shown in FIG. 10, the greening material cut by the cutting machine 20 is put into a material storage hopper 27 to be a composite material, and is transported and dispersed by the transport pipe 1 in the same manner as described above. .

On the other hand, in the Y-tube method, as shown in FIG.
The ejection pipe 8 is connected from the oblique side of the transport pipe 1A toward the transport direction, and the air A is ejected to transport the transport material Z.

[0007] These prior arts are useful.
However, in the prior art as described above, the flow of the object to be transported (for example, the transport material Z or the greening material described above) and the pressure fluid is uneven and concentrated in one direction, and the object to be transported is located on the inner wall surface of the pipe. It will be pressed. Then, the transport object comes into contact with the inner wall surface of the pipe and immediately adheres. Then, it becomes difficult for the fluid to flow at the location where the transport target adheres, and eventually the transport pipe is closed. Here, in the prior art described above, since a high-pressure fluid is used, when the fluid becomes difficult to flow or the transport pipe is closed, a backflow occurs immediately.

Conventionally, the necessity of preventing such a backflow was recognized, but a definitive solution has been proposed since it is impossible to prevent the object to be transported from coming into contact with the inner wall surface of the pipe. It is not at present.

Further, the conventional air ring 10 (FIG. 7) and the Y-shaped tube (FIG. 8) have a problem that a suction action for drawing an object to be transported into the transport tube cannot be expected.

In addition, in the prior art, the flow of the transporting material and air is uneven and concentrated in one direction, so that the material is conveyed while being agitated and mixed to one side in the transporting pipe. Separation easily occurs. For this reason, there is a problem in mixing and stirring the materials, especially when the spraying method is applied.

[0011]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems in the prior art, and ensures reliable spraying without transport blockage or backflow in a transport pipe when transported by a fluid. It is an object of the present invention to provide a fluid ejecting apparatus capable of transporting a transport material.

[0012]

A fluid ejecting apparatus according to the present invention is mounted on a transport pipe used in a fluid transport apparatus for transporting an object using a pressurized fluid, and ejects a pressurized fluid into the transport pipe. In the fluid ejecting apparatus, an inner cylinder and an outer cylinder that are opposed to each other with a tapered surface that decreases in diameter in the transport direction are provided, and a ring-shaped ring in which pressure fluid is supplied between the outer cylinder and the inner cylinder at the front end in the transport direction. A space is provided, and a helical passage is provided in the tapered surface so as to communicate from the ring-shaped space to the tip of the inner cylinder, and pressurized fluid is helically ejected along the inner circumference of the transport pipe.

Here, it is preferable that the helical passage is constituted by a helical groove formed on the outer periphery of the inner cylinder taper surface and an outer cylinder taper surface.

Alternatively, it is preferable that the helical passage is constituted by a helical projection protruding from an outer periphery of the inner cylinder taper surface and an outer cylinder taper surface.

According to the present invention having such a configuration, the pressure fluid supplied to the ring-shaped space is helically ejected from the tip of the inner cylinder along the inner circumference of the transport pipe. The helically ejected pressure fluid forms a layer of the pressure fluid on the inner wall surface of the transport pipe, and the layer of the pressure fluid acts as a barrier for preventing the transport material from contacting the inner wall surface of the pipe. As a result, the transport material is smoothly guided to the downstream side and transported without adhering to the inner wall surface of the pipe.

The present invention is, for example, a greening method for sucking latent topsoil (seed, plant propagation body), transporting it to a destination, spraying or spraying, cutting a plant body or a mixture thereof with a culture soil. It is suitable for a greening method of sucking and spraying or spraying the target surface, or material transport using a liquid material such as mud and compressed air supplied through means attached to a transport pipe. Long-distance transportation can be dealt with by interposing a plurality of fluid ejection devices of the present invention in the middle of the transportation pipe.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, an air injection device indicated generally by reference numeral 10A relates to one embodiment of the fluid injection device of the present invention, and includes an inner cylinder 11 and an outer cylinder 12. One end of the inner cylinder 11 is connected to the transport pipe 2A on the upstream side (left side in FIG. 1) by a coupling 16A. As shown in FIG. 2, on the outer periphery of the other end (the right side in FIG. 2),
A tapered surface 11t whose diameter is reduced in the transport direction (downstream side: rightward in FIG. 2) is formed.

At the large-diameter end (upstream end: right end in FIG. 2) of the tapered surface 11t, a groove 11c for forming the ring-shaped space 5 in cooperation with the outer cylinder 12 is provided. . A groove for mounting the ring-shaped packing 17 is provided in the large-diameter portion 11 a on the upstream side, and a screw portion 11 av that is screwed with the outer cylinder 12 is provided.

As shown in FIG. 3, the outer cylinder 12 has a tapered surface 12 fitted on its inner periphery with the tapered surface 11t of the inner cylinder.
t, a screw portion 12 screwed with the screw portion 11av of the inner cylinder 11
a are formed. As is clear from FIG. 1, the other end on the downstream side of the air injection device 10A is connected to the downstream transport pipe 2B by a coupling 16B.

On the tapered surface 11t of the inner cylinder 11, a plurality of spiral grooves 13 (FIGS. 1 and 2) are cut. The ring-shaped space 5 formed by the groove 11c and the outer cylinder 12 communicates with the inner cylinder tip 11b via a spiral passage formed by the groove 13 and the outer cylinder tapered surface 12t.

An air injection port 7 (FIG. 1) is provided outside the ring-shaped space 5 of the outer cylinder 12. Referring to FIG. 1, pressure air is injected from the injection port 7,
Since it is guided by the spiral groove 13 and is ejected from the distal end portion 11b to generate a spiral flow (indicated by an arrow "t-A" in FIG. 1) flowing downstream along the inner periphery of the transport pipe 2B. is there.

Next, in an air injection device 10B according to another embodiment of the present invention shown in FIG. 4, the transport pipe 2C on the upstream side and the inner cylinder 11A are connected by a screw joint (not shown). . As shown in FIG. 5, the inner cylinder 11A is provided with a screw 12a for screwing with the outer cylinder 12A at one end and a tapered surface 11t at the other end.

On the other hand, as shown in FIG. 6, the outer cylinder 12A has a ring-shaped space 5 adjacent to a screw portion 12b provided at one end (a screw portion to be screwed with the screw portion 12a of the inner cylinder 11A).
Is formed. The tapered surface 11t of the inner cylinder 11A is provided in front of the groove 12c (to the right in FIG. 6).
Is formed, and a screw portion 12d (FIG. 6) that is screwed to the screw portion 2D-a (FIG. 4) of the downstream transport pipe 2D (FIG. 4) is formed.

A plurality of helical projections 13A (FIGS. 4 and 5) protrude from the tapered surface 11t of the inner cylinder 11A. As shown in FIG. 4, when the inner cylinder 11A and the outer cylinder 12A are combined, the helical projection 13A comes into contact with the tapered surface 12t of the outer cylinder, and the helical passage between the adjacent projections 13A, 13A. Is formed. The tip end 11b is communicated from the ring-shaped space 5 by the spiral passage. In addition,
An air injection port 7 is provided outside the ring-shaped space 5 of the outer cylinder 12A.

The compressed air supplied from the air inlet 7 is jetted from the tip 11b through a spiral passage formed by the projections 13A, 13A. The compressed air guided through the spiral passage is shown in FIG. It becomes a spiral airflow as shown by an arrow tA and flows through the downstream transport pipe 2D.

The air injection device 1 configured as described above
If compressed air or a mixture of compressed air and a liquid is supplied to the injection port 7 of the air injection device by inserting 0A or 10B into the transport pipe, the spiral passage 13 formed between the inner and outer cylinders 11 and 12 is supplied. A spiral air jet is generated along the inner circumference of the transport pipe from the tip 11b of the inner cylinder being guided.

This spiral air jet flows along the inner wall surface of the transport pipe and forms a layer of compressed air radially inside the inner wall surface of the transport pipe. The presence of this layer of compressed air prevents contact between the transport material and the inner wall surface. As a result, the transport material is transported downstream without contacting or adhering to the inner wall surface of the transport pipe. Therefore, the transport pipe is not blocked, and the compressed air does not flow backward.

In the illustrated embodiment, transportation by compressed air is described, but the present invention is not limited to this. For example, the present invention can be applied to transportation by liquid, transportation to a mixture of liquid and gas, and the like.

[0030]

According to the present invention, as described above, the compressed air supplied to the ring-shaped space, or the liquid or a mixture of both, is transferred from the distal end of the inner cylinder along the inner circumference of the transport pipe. Spiral is spouted, and the transport material can be smoothly guided downstream and transported without adhering to the inner wall surface of the pipe.

In particular, the present invention can be suitably applied to sucking cut pieces of plant bodies in the field of greening and spraying / spraying them on the target surface.

[Brief description of the drawings]

FIG. 1 is a partial sectional view showing an embodiment of the present invention.

FIG. 2 is a side view showing an inner diameter portion of FIG. 1;

FIG. 3 is a sectional view showing an outer diameter portion of FIG. 1;

FIG. 4 is a partial cross-sectional view showing another embodiment of the present invention.

FIG. 5 is a side view showing the inner diameter part of FIG. 4;

FIG. 6 is a sectional view showing the outer diameter portion of FIG. 4;

FIG. 7 is a diagram illustrating an air ring.

FIG. 8 is a diagram illustrating a Y-tube.

FIG. 9 is a cross-sectional view showing a greening material cutting and spreading machine as an example of a conventional suction transport device.

FIG. 10 is a sectional view showing another example of FIG. 9;

[Explanation of symbols]

 1, 1A ... transport pipe 2A, 2B, 2C, 2D ... transport pipe 5 ... ring-shaped space 7 ... air injection port 10, 10A, 10B ... air ring 11, 11A ... Inner cylinder 11t: tapered surface 12, 12A: outer cylinder 12t: tapered surface 13: spiral groove 13A: spiral projection

Claims (3)

[Claims] 1. A fluid ejecting apparatus mounted on a transport pipe used in a fluid transport apparatus for transporting an object using a pressure fluid and ejecting the pressure fluid into the transport pipe, the diameter of which is reduced in the transport direction. An inner cylinder and an outer cylinder that are opposed to each other with a tapered surface are provided, a ring-shaped space to which a pressure fluid is supplied is provided between the outer cylinder and the inner cylinder at the front end in the transport direction, and a spiral passage is formed in the tapered surface. A fluid ejecting apparatus, wherein the fluid ejecting apparatus is provided so as to communicate from the ring-shaped space to the distal end of the inner cylinder, and to eject a pressurized fluid spirally along the inner circumference of the transport pipe. 2. The fluid ejecting apparatus according to claim 1, wherein the helical passage includes a helical groove formed on an outer periphery of the inner cylinder taper surface and an outer cylinder taper surface. 3. The fluid ejecting apparatus according to claim 1, wherein the helical passage includes a helical projection protruding from an outer periphery of the inner cylinder taper surface and an outer cylinder taper surface.