JP2002346437A - Rotating nozzle unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology capable of spraying high pressure water only within a predetermined range and repeating to spray high pressure water straightly in one direction within the range. SOLUTION: A rotating nozzle unit comprises a fixed axis pipe 1 which has a spray nozzle for high pressure water on the outer surface of the pipe, a ring-shaped body 6, which is installed rotatably on the outer surface of the axis pipe covering a spray nozzle 4 with the inner surface of the orifice, and whose flow path communicated with the spray nozzle, when rotated, passes through the outer surface, multiple nozzles 12 communicated with the flow path 8 of the ring-shaped body and fixed onto the same circumference of the outer surface of the ring-shaped body, a rotating pipe 18 enveloping the ring- shaped body except the foreside of the nozzles and the axis pipe as a unit, and a locking member 19 to connect the ring-shaped body to the rotating pipe. An orifice for pressure balancing can be made on the opposite side of the nozzle of the axis pipe and the end of the axis pipe can be communicated with the end of an identically shaped axis pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary nozzle unit which injects high-pressure water only within a predetermined range, and in which the injection is repeated linearly in one direction within this range.

[0002]

2. Description of the Related Art Heretofore, when high-pressure water is repeatedly jetted from a nozzle to the same place, there has been a method in which the nozzle is turned at a predetermined radius.

[0003]

However, when the nozzle is swiveled in a predetermined range, the structure can be easily formed. However, since the high-pressure water is injected in all directions from the rotation center axis, the impact direction is reduced. However, there is a problem that the method cannot be applied to the case where repeated injection is required by directing the nozzle in only one direction. In addition, the jet water in the direction that does not require impact is completely wasted, and there is a problem that a loss of pump energy for producing high-pressure water, a loss of used water, and unnecessary wear of the nozzle orifice occur. Instead of rotating the nozzle in a predetermined range, a plurality of flow paths are provided in the axial direction of the rotating body to communicate the nozzles with each other, and high-pressure water supplied from one end side of the body via a rotary joint,
By supplying only to the flow path that sequentially goes to the predetermined position,
There is also a method of repeatedly injecting high-pressure water only to a predetermined position. However, in this method, since the other flow paths are vacant, it is difficult to make an instantaneous injection even at the injection position, and when it is necessary to change the number of nozzles provided in the pipe axis direction, , All have to be rebuilt.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. It is an object of the present invention to obtain a straight hitting locus by directing high-pressure water only within a predetermined range. It is an object of the present invention to provide an economical rotary nozzle unit which can be repeatedly used in this injection range, can be easily used in various places, and has a simple structure. Another object of the present invention is to provide a rotary nozzle unit having a wide application range in which the range of impact by injection can be freely set.

[0005]

In order to solve the above-mentioned problems, in the rotary nozzle unit according to the first aspect of the present invention, high-pressure water is introduced into a pipe, and a discharge port of the high-pressure water is provided on an outer peripheral surface. A pipe shaft having a fixed and supported state, and the discharge port is rotatably mounted on the pipe shaft outer peripheral surface while covering the discharge port with an inner peripheral surface of the hole, and a flow path communicating with the discharge port during rotation is extended to the outer peripheral surface. A ring-shaped body provided therethrough, a nozzle communicating with a flow path of the ring-shaped body, and fixed to an outer peripheral surface side of the ring-shaped body; and a rotating means for the ring-shaped body. Features.

According to a second aspect of the present invention, in the rotary nozzle unit according to the first aspect,
When the pressure-balancing opening whose sum of the opening areas is substantially the same as the discharge port area is viewed around the axis of the tube axis, the nozzle of the ring-shaped body is rotated when the ring-shaped body is rotated on the discharge port and the target side. It is characterized in that it is provided at a position that does not overlap with the communication channel.

According to a third aspect of the present invention, in the rotary nozzle unit according to the first or second aspect, the nozzle communicating with the discharge port via the flow path during rotation is the same circle as the ring-shaped body. It is characterized in that a plurality are arranged on the circumference.

According to a fourth aspect of the present invention, in the rotary nozzle unit according to any one of the first to third aspects, the nozzle spreads the fluid in a fan shape and ejects the fluid. And

According to a fifth aspect of the present invention, there is provided a rotary nozzle unit according to any one of the first to fourth aspects, wherein the outer diameter of the pipe shaft and the inner diameter of the hole of the ring-shaped body are different from each other. The diameter gap is formed in a range of 30 μm to 1 μm.

According to a sixth aspect of the present invention, there is provided a rotary nozzle unit according to any one of the first to fifth aspects, wherein the end of the tube shaft has the same shape as the end of the tube shaft. It is characterized by being provided so that connection is possible.

According to a seventh aspect of the present invention, there is provided a rotary nozzle unit according to any one of the first to sixth aspects, wherein the rotating means comprises a ring-shaped body and a pipe shaft except for a front surface of the nozzle. And a locking member for connecting the ring-shaped body to the rotating tube.

[0012]

In the rotary nozzle unit according to the first and third aspects of the present invention, the ring-shaped body rotates around the pipe axis. Since the pipe shaft is fixed, the discharge port of the high-pressure water opened on the outer peripheral surface is stopped at a certain position.
Due to the rotation of the ring-shaped body, the flow path is always connected to the discharge port at a fixed position, and high-pressure water is supplied to the nozzle. Therefore,
The nozzle injects high-pressure water only to the extent that the flow path of the ring-shaped body is connected to the discharge port. in this case,
Since the nozzle is rotating around the axis, when the jetting destination is viewed on a plane, the jetting is performed so as to show a linear trajectory within a certain range. When a plurality of nozzles are arranged on the same circumference of the ring-shaped body, the continuous rotation of the ring-shaped body connects each flow path to the discharge port at a fixed position sequentially, so that the injection is performed in the same direction in the same range. It will be repeatedly performed for.

In the rotary nozzle unit according to the second and fifth aspects of the present invention, when only the discharge port is opened in the pipe shaft, the pipe shaft receives a force in the direction opposite to the discharge port due to water pressure. The pipe shaft is pressed to one side in the ring-shaped body, but the pressure balance opening provided in substantially the same area as the discharge port cancels out, and smooth rotation can be obtained. In this case, the pressure balance opening is
Since the ring-shaped body is located outside the nozzle communication flow path, even if the ring-shaped body provided with a plurality of nozzles rotates, high-pressure water can be ejected from the nozzles other than the nozzle corresponding to the discharge port. Absent. Further, as described above, since the pressure in the pipe shaft is balanced, the diameter gap between the outer diameter of the pipe shaft and the hole diameter of the ring-shaped body is 30 μm to 1 μm.
That is, the leakage can be suppressed even with high-pressure water.

In the rotary nozzle unit according to the fourth and sixth aspects of the present invention, high-pressure water is sprayed in a fan shape to the object, and a wide spray range is ensured even with nozzles arranged in a line on the circumference. Can be. In addition, a plurality of nozzle rows can be provided in the axial direction by connecting the pipe shafts in a row, and the nozzles can be jetted over a wide range without gaps. In this method, the length can be freely adjusted to a desired length without newly providing a long tube shaft.

In the rotary nozzle unit according to a seventh aspect of the present invention, the ring-shaped body and the pipe shaft are inserted inside the rotary pipe as the rotating means, and the locking member engages the ring-shaped body. It will stop and rotate. Since this rotating pipe covers the ring-shaped body and pipe shaft,
At the same time that the ring-shaped body is rotated, the ring-shaped body also serves as a protective tube for protecting the high-pressure water from splashing.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. 1 is an axial sectional view showing a rotary nozzle unit according to an embodiment, FIG. 2 is a sectional view at right angles to a coaxial axis, and FIG. 3 is an enlarged view of a main part showing the same operation.

In FIG. 1, reference numeral 1 denotes a tube shaft supported in a fixed state. The pipe shaft 1 is provided in a cylindrical shape so as to penetrate the high-pressure water introduction passage 2 in the axial direction, and has a discharge port 4 penetrating from the introduction passage 2 to the outer peripheral surface 3 only at one location in the center in the longitudinal direction. Is provided. Reference numeral 5 denotes a discharge surface provided at an opening of the outer peripheral surface 3 of the discharge port 4. The discharge surface 5 has a shape in which a part of the outer peripheral surface 3 is flattened and provided to set an injection range described later. In FIG. 5, reference numeral 4a denotes a pressure balancing opening. This pressure balance opening 4a is located near the target position of the discharge port 4 when viewed about the axis of the tube shaft 1, that is,
When the ring-shaped body 6 described later rotates close to a position where the ring-shaped body 6 does not overlap the nozzle communication flow path 8 when the ring-shaped body 6 rotates,
The openings are formed at half the size of the outlets 4 so that the total area of the openings is the same as the area of the outlets 4.

Reference numeral 6 denotes a ring-shaped body rotatably mounted on the tube shaft 1. The ring-shaped body 6 includes:
Six passages 8 are provided at the center of the outer peripheral surface from the insertion hole 7 for the tube shaft 1 provided at the shaft center. 9 is the flow path 8
Is a flow path opening opening in the insertion hole 7 (FIG. 1 shows a cross-sectional shape along the line AOB in FIG. 2).
Further, in the insertion hole 7, only a very small gap is provided with respect to the outer peripheral surface 3 of the tube shaft 1. The diameter gap between the outer diameter of the pipe shaft and the hole diameter of the ring-shaped body is 30 μm to 1 μm.
By setting the amount as small as μm and a gap suitable for various conditions such as the degree of pressure and the thickness of the shaft, it is possible to suppress leakage even with high-pressure water. Reference numeral 10 denotes a rolling bearing for supporting both ends of the ring-shaped body 6 on the tube shaft 1, and reference numeral 11 denotes a seal for preventing high-pressure water from leaking in the direction of the rolling bearing 10. The rolling bearing 10 may not be necessary depending on the use condition (low frequency, high frequency, etc., when appropriateness and fitting of both materials are considered). Numeral 12 is a nozzle inserted on the outer peripheral surface side of the flow channel 8, and jets high-pressure water in a fan shape.

Here, the relationship between the discharge surface 5 of the tube shaft 1 and the flow passage 9 of the ring-shaped body 6 will be described in detail. The discharge surface 5 is formed by cutting the outer peripheral surface 3 of the tube shaft 1 into a flat shape, and this flat portion has a shape in which a space is formed between the flat surface and the insertion hole 7 of the ring-shaped body 6. I have. While the discharge surface 5 is provided at one place on the tube shaft 1, the flow paths 8 of the ring-shaped body 6 are equally arranged at six places, so that the flow path openings 9 opening to the insertion holes 7 are mutually connected. That is, they are arranged at intervals 13 of 60 degrees. That is, the nozzles discharge high-pressure water every time the rotation angle exceeds 60 degrees. In the present embodiment, the ejection surface 5
3, the width in the rotation direction, that is, the width in which the flow path port 9 communicates with the discharge surface 5 and can discharge high-pressure water, as shown in FIG.
2, when the flow path opening 9a of the preceding nozzle 12a approaches the end 5b of the discharge surface 5 in the rotation direction (open arrow in the figure), the flow path opening 9 of the nozzle 12b which continues to that end.
b is provided so as to reach the start end 5 a of the discharge surface 5. In other words, the preceding nozzle 12a is still discharging high-pressure water, and the next nozzle 12b starts discharging high-pressure water near the end of discharge.

Returning to the previous description, 14
Is a collet-type joint in which the tube shaft 1 is connected in the axial direction and a plurality of nozzles are arranged in the lateral direction. 1
5 is an adapter for adjusting the interval between the nozzle rows and for connecting from the left and right using joints of the same shape,
16 is a positioning pin, and 17 is a union nut. Both ends of the connected tube shafts 1 are fixed by brackets (not shown) such that the discharge surface 5 faces substantially toward the working position, and one end thereof is connected to a high-pressure water source. Reference numeral 18 denotes a ring-shaped body 6 inserted over the entire length of the pipe shaft fixed and connected.
Is formed so as to integrally cover the ring-shaped body 6 and the tube shaft 1 except for the front surface of the nozzle 12, and is formed so as to be bisected in the axial direction. 2
Reference numeral 2 denotes an opening for exposing the nozzle 12 to the outside. Reference numeral 19 denotes a pin (locking member) for connecting the ring-shaped body 6 to the rotating pipe 18. The pin 19 protrudes from flanges 20 fixed to both sides of the ring-shaped body 6.
Is loosely inserted into the small hole 21 of the rotary tube 18.

Next, the operation will be described. In the rotary nozzle unit of the present embodiment, first, all the ring-shaped bodies 6 are simultaneously driven to rotate via the pins 19 by the rotational force of the rotary tube 18. Of the nozzles 12 of the ring-shaped body 6, the flow passage 9a of the preceding nozzle 12a in the rotation direction
Continues to jet high-pressure water until it reaches the start end 5a of the discharge surface 5 and passes through the end 5b. In other words, when the high-pressure water is injected such that the discharge surface 5 faces obliquely downward and forward, and the ring-shaped body 6 rotates so as to pass the discharge surface 5 with the flow path opening 9 directed upward from below, the high-pressure water is injected. A linear trajectory is formed from the near side to the forward side. Then, the next injection is performed so as to form the same trajectory shortly after the end of the injection of the nozzle. That is, the injection of high-pressure water is performed many times so as to trace the same position. In this case, the orifice of the nozzle 12 injects high-pressure water in a fan shape to the object, and a wide injection range can be ensured even with nozzles arranged in a single row on the circumference.

In such an injection mode, since the high-pressure water sends the exfoliated material to the back and the back, the finished state can be checked at a glance, and unnecessary work can be avoided and work can be performed efficiently. become. The ring-shaped body 6
The adjustment of the number of revolutions is simple, and an optimum injection state can be formed according to the content of the work. Injection angle is also tube axis 1
It can be easily changed simply by adjusting the fixing position of. The ejection mode of the preceding nozzle and the nozzle following it can be variously changed according to the size of the ejection surface 5. In the present embodiment, since the tube shaft 1 is provided in series, a plurality of nozzle rows can be provided in the axial direction, and the nozzle can be jetted over a wide range without gaps. In this method, the length can be freely adjusted to a desired length without newly providing a long tube shaft.
Further, when the pipe shaft receives a force in the direction opposite to the discharge port 4 by water pressure and is pressed to one side in the ring-shaped body, a pressure balancing opening 4a provided in the same area as the discharge port 4 is formed.
Cancel each other out and smooth rotation can be obtained. Since the pressure balancing opening 4a is located at a position deviated from the flow path 8 of the ring-shaped body 6, the rotary nozzle unit sprays only in a predetermined direction.

The embodiment of the present invention has been described above, but the specific configuration of the present invention is not limited to this embodiment. For example, the nozzles 12 are arranged at six places on the ring-shaped body 6, but the number of nozzles 12 can be set arbitrarily and may be one or more. The discharge surface 5 of the pipe shaft is
Although the outer peripheral surface is formed by cutting it into a plane, the outer peripheral surface may be formed in a round spot facing shape or a long groove shape. The joint shape between the tube shafts 1 can be set arbitrarily. Although the nozzles 12 are provided in one line on the same outer peripheral surface of the ring-shaped body, a plurality of nozzles 12 may be provided. In this case, the injection positions of the rows can be arbitrarily set. When it is not necessary to protect the pipe shaft or ring-shaped body, such as when the discharge pressure of high-pressure water is low or the bounce is small, do not use a rotating pipe, insert a rod and connect each ring-shaped body to rotate. You may do so. Also, the tube axis is short,
If they can be supported on the way, they can be driven by belts, chains, gears, etc.

[0024]

As described above, in the rotary nozzle unit of the present invention, the injection can be performed so as to show a linear trajectory in one direction within a certain range.
It is possible to always accurately grasp the finished state of the striking surface by feeding off the separated material or water by the spraying. When the injection is repeatedly performed from the same position, the operation of stopping the injection and returning the nozzle to the original position is not required, and the operation can be performed extremely efficiently without wasting time. Since a plurality of nozzles are arranged on the same circumference of the ring-shaped body, the continuous rotation of the ring-shaped body connects each flow path to the discharge surface at a fixed position sequentially, so that the injection is performed in the same direction in the same range. It is possible to perform the work efficiently by repeatedly performing the operation. It has a very simple structure for rotating and driving a large number of nozzles to perform injection within a certain range, so that it is easy to handle and can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is an axial sectional view showing a rotary nozzle unit according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view at right angles to an axis showing the rotary nozzle unit according to the embodiment;

FIG. 3 is an enlarged view of a main part showing the operation of the rotary nozzle unit according to the embodiment.

FIG. 4 is a front view showing a connecting portion for connecting the rotary nozzle unit of the embodiment in a continuous manner.

FIG. 5 is a cross-sectional view showing the periphery of a pressure balancing opening according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipe shaft 2 High pressure water introduction path of tube shaft 3 Outer peripheral surface of tube shaft 4 Discharge port of pipe shaft 4a Pressure balance opening 5 Discharge face of discharge port 5a Start of discharge face 5b End of discharge face 6 Ring-shaped body 7 ring Insertion hole of ring-shaped body 8 Ring-shaped body passage 9 Ring-shaped body passage 12 Nozzle 18 Rotating tube 22 Nozzle exposure opening

Claims (7)

[Claims] 1. A pipe shaft in which high-pressure water is introduced into a pipe and has a discharge port on the outer peripheral surface thereof and is supported in a fixed state, and the discharge port is covered by an inner peripheral surface of the hole and an outer peripheral surface of the pipe shaft. A ring-shaped body which is rotatably mounted on the body and which is provided with a flow path communicating with the discharge port at the time of rotation and penetrating to the outer peripheral surface; and an outer periphery of the ring-shaped body which communicates with the flow path of the ring-shaped body. A rotary nozzle unit comprising: a nozzle fixed to a surface side; and means for rotating the ring-shaped body. 2. A pressure-balancing opening having a total opening area substantially equal to a discharge port area is formed when said ring-shaped body is rotated when said ring-shaped body is located on said discharge port and a target side when viewed about the axis of a tube axis. The rotary nozzle unit according to claim 1, wherein the ring-shaped body is provided at a position that does not overlap with the nozzle communication flow path. 3. The rotary nozzle according to claim 1, wherein a plurality of nozzles communicating with the discharge port via a flow path during rotation are arranged on the same circumference of the ring-shaped body. unit. 4. The rotary nozzle unit according to claim 1, wherein the nozzle sprays the fluid in a fan-shaped manner. 5. The method according to claim 1, wherein a diameter gap between the outer diameter of the tube shaft and the inner diameter of the hole of the ring-shaped body is formed in a range of 30 μm to 1 μm. The rotating nozzle unit as described. 6. The rotary nozzle unit according to claim 1, wherein an end of the tube shaft is provided so as to be connected to an end of the tube shaft having the same shape. 7. The rotating means is formed by a rotating pipe that integrally covers the ring-shaped body and the pipe shaft except for the nozzle front face, and a locking member that connects the ring-shaped body to the rotating pipe. The rotary nozzle unit according to any one of claims 1 to 6, wherein: