JPH0681467A - Ultra high pressure water injection nozzle - Google Patents

Abstract

PURPOSE:To provide an ultra high pressure water injection nozzle which ensures flatness of a working surface when laitance is scraped off by injection of ultra high pressure water against a concrete surface and is advantageous in recovery of the scraped off laitance and sludge. CONSTITUTION:In an ultra high pressure water injection nozzle 511 having a plurality of injection nozzles 511B which have openings 5115 formed in a body 511A and through which ultra high pressure water is injected toward a working surface C, the openings 5115 of a plurality of the injection nozzles 511B are formed at the same distance from the working surface C. The axes of a plurality of the injection nozzles 511B are extended in parallel to each other at an oblique angle theta with the working surface C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrahigh pressure water jet nozzle suitable for green cutting work and the like.

[0002]

2. Description of the Related Art When constructing a dam, the seam processing work for removing the leitance on the concrete surface, that is, the green cutting work is conventionally performed by rotating a brush and scraping off the concrete surface with this brush. Since the work of mechanical shaving is done, there is a limit to the work efficiency. Therefore, the applicant has filed Japanese Patent Application No.
In No. 280655 and Japanese Patent Application No. 3-298158, super high pressure water was jetted from the super high pressure water jet to scrape off the leitance, and the scraped leitance was collected together with polluted water to improve work efficiency. A green cutting work method is proposed.

[0003]

On the other hand, when jetting super high pressure water from the super high pressure water jet nozzle onto the concrete surface to scrape off the laitance, when the super high pressure water is jetted from a direction perpendicular to the concrete surface, As shown in FIG. 8, the kinetic energy of the super-high pressure water all acts in the direction of vertically excavating the concrete surface C, so that the laitance is scraped off, but fine irregularities tend to occur on the concrete surface C1 where the laitance is scraped off. Therefore, it is difficult to secure flatness.

Further, when the ultra-high pressure water is jetted from the direction orthogonal to the concrete surface C, as shown in FIG. 9, the scraped leitance and the polluted water scatter in all directions, and the scattering direction is specified. Since it is not performed, it is not preferable from the viewpoint of recovering the scraped leitance and the polluted water. The present invention has been devised in view of the above circumstances, and an object of the present invention is to ensure flatness of a work surface when jetting ultra high pressure water onto a concrete surface to scrape off the leitance, and An object of the present invention is to provide an ultra-high-pressure water injection nozzle that is advantageous in collecting scraped off raitance and polluted water.

[0005]

To achieve the above object, the present invention relates to an ultrahigh pressure water injection nozzle for injecting ultrahigh pressure water toward a work surface from a plurality of injection holes formed in a body. The openings of the injection holes are provided at the same distance from the work surface, and the axes of the plurality of injection holes are provided parallel to each other at an oblique angle with respect to the work surface. Characterize.

Further, according to the present invention, an inclined surface that obliquely intersects with the work surface is provided at a position where the body faces the work surface, and the ejection hole is formed perpendicularly to the inclined surface. And

[0007]

EXAMPLES Examples in which the present invention is applied to a green cutting device will be described below. FIG. 1 is an explanatory diagram of the green cutting device, and FIG. 2 is a schematic configuration diagram thereof. The green cut device 1 includes an ultra high pressure water supply unit 3 and a work vehicle unit 5.
And a mud collection unit 7 are included.

The ultra-high pressure water supply unit 3 includes an engine 30.
1, a water supply pump 303, an ultrahigh pressure water pump 305, a filtration device 307, a water supply tank 309, and the like. Water pump 3
03 and the ultra high pressure water pump 305 are driven by the engine 301, and the construction water is filtered by the water supply pump 303.
07 is supplied to the water supply tank 309, and the water in the water supply tank 309 is sent out by the ultra high pressure water pump 305 via the ultra high pressure water hose 311. The ultra-high pressure water supply unit 3 having such a configuration can be mounted on the automatic guided vehicle 313 for the ultra-high pressure water supply unit, as shown in FIG.

The work vehicle unit 5 is movably supported by an automated guided vehicle 501 (corresponding to a work vehicle), and is arranged on a bank 9 on which green cutting work is performed. The work vehicle unit 5 includes a carriage 50 connected to a front portion of an automated guided vehicle 501.
3, a housing 505 having an open lower part supported by a trolley 503; a super-abrasive rubber plate 507 that hangs down on the side surface of the housing 505 to contact a concrete surface to form a closed space in the housing 505; The injection nozzle 5 connected to the hose 509 and arranged in the housing 505.
11, a vacuum hose 515 connected to the suction port 513 of the housing 505, and the like.

FIG. 3 is a schematic side view of the injection nozzle, FIG. 4 is a side view of the injection nozzle, FIG. 5 is a bottom view of the injection nozzle, and FIG. 6 is an enlarged view of the ejection hole portion. The injection nozzle 511 is
Nozzle body 511A and a large number of ejection holes 511B (48 in the embodiment) formed in this nozzle body 511A.
And the super high pressure water from the super high pressure water hose 509 is discharged through the passages 511C in the nozzle body 511A.
Ejected from 11B.

More specifically, as shown in an enlarged view in FIG. 6, the nozzle body 511A has a bottom surface 5101 parallel to the concrete surface C which is a working surface, and the bottom surface 511.
A plurality of recesses 5103 are formed at 01. And
On the slope 5105 that constitutes this recess 5103 and intersects the bottom surface 5101 obliquely, the hole 5 that is orthogonal to the slope 5105 is formed.
107 is formed, and an O-ring 5109 is formed in this hole 5107.
And the nozzle tip 511 through the set bolt 5111.
3 is embedded and fixed, and the ejection hole 511 is formed on the slope 5105.
The B opening 5115 is located. The large number of injection holes 5
The openings 5115 of 11B are provided at the same height from the concrete surface C, and the axes of the numerous injection holes 511B are provided parallel to each other at an angle θ with respect to the concrete surface C.

The angle θ of the axis of the ejection hole 511B with respect to the concrete surface C is set so that the traveling direction F side of the vehicle becomes an obtuse angle in the embodiment. In this embodiment, at the time of green cutting, the jet nozzle 511 reciprocates together with the carriage 503 to the left and right of the automatic guided vehicle 501, and the jet nozzle 511 has a surface in which the trajectory of the ultrahigh pressure water is a predetermined width. As a whole, it is configured to move on a circular locus (it does not rotate on its own).

The ultra-high pressure water hose 311 and the ultra-high pressure water hose 509 are connected to each other via a winding / unwinding mechanism 517 mounted on the automatic guided vehicle 501, and the vacuum hose 515 is mounted on the automatic guided vehicle 501. The vacuum hose 515 is supported by the winding and unwinding mechanism 519 so as to be able to be wound and unwound, and this vacuum hose 515 is connected to the vacuum hose 701 on the mud collecting unit 7 side through the winding and unwinding mechanism 519.

As shown in FIGS. 1 and 2, the mud collecting unit 7 includes a vacuum pump 703 and a vacuum pump for sucking the leitance scraped off by the ultra-high pressure water together with the polluted water through the vacuum hoses 515 and 701. An engine 704 for driving the pump 703, a latance recovery tank 705 provided in the vacuum hose 701 portion in front of the vacuum pump 703, and a vacuum hose 701 portion provided between the vacuum pump 703 and the recovery tank 705. A drainage pump 707 and the like are provided, and the mud collection unit 7 is arranged at a location apart from the bank body 9.

Next, the operation will be described. While the carriage 503 is driven by the automatic guided vehicle 501, the housing 50
In 5, the super-high pressure water is jetted from the jet nozzle 511 to the concrete surface C, and the leitance is scraped off.
The scraped raitans is sucked together with the polluted water from the suction port 513 by the force of the polluted water in which the ultra-high pressure water is jetted to the concrete surface C and bounces back and the vacuum action of the vacuum pump 703, and the vacuum hoses 515, 7
It is sent to the vacuum pump 703 side via 01.
Then, in the recovery tank 705, the leitance and the shear are removed, and the polluted water from which the leitance and the shear are removed is discharged from the drainage pump 707 and the drainage hose 707A into the drainage pit of the muddy water, and only the air is discharged after the drainage pump 707. It is sucked from the vacuum hose 701 to the vacuum pump 703.

In the above, when the super-high pressure water is jetted, the super-high pressure water is jetted at an angle θ with respect to the concrete surface C. Therefore, as shown in FIG. It acts like peeling off the leitance of C, so that minute irregularities are unlikely to occur on the concrete surface C1 from which the leitance has been scraped off, and its flatness can be secured.

Further, although the super-high pressure water is obliquely jetted from the large number of jetting holes 511B, the jetting holes 511B are parallel to each other, and the openings 5115 of the jetting holes 511B are provided at the same height. Therefore, the distances from the openings 5115 along the axis of each injection hole 511B to the concrete surface C are all equal, and therefore, there is no unevenness in the green cutting work, which is advantageous in ensuring the flatness.

Further, since all of the kinetic energy of the ultrahigh pressure water acts as a force for peeling off the leitance, compared to the case where all of the kinetic energy of the ultrahigh pressure water is directed in the vertical direction and acts as excavating force, the scraping of the leitance is carried out. The work efficiency is high, and therefore the traveling speed of the automatic guided vehicle 501 can be increased, and the efficiency of the green cutting work can be improved.

Further, since the direction in which the ultra-high pressure water bounces on the concrete surface is constant and specified, by providing the suction port 513 in the bounce direction, the scraped laitance and polluted water can be efficiently collected.

Further, in the embodiment, since the ultra-high pressure water is jetted to the concrete surface C at an angle θ where the traveling direction F side of the work vehicle becomes an obtuse angle, the concrete surface C can be seen from diagonally rearward to frontward. The kinetic energy of the ultra-high pressure water acts so as to remove the leitance, and the efficiency of the green cutting work can be further enhanced.

Further, the nozzle body 511A is formed with an inclined surface 5105 which intersects the concrete surface C at an angle, and the ejection hole 511B is formed orthogonally to the inclined surface 5105. It is possible to easily form a large number of ejection holes 511B that are located and are parallel to each other at an oblique angle with respect to the concrete surface C.

[0022]

As is apparent from the above description, according to the present invention, in the ultra high pressure water injection nozzle for injecting the ultra high pressure water toward the work surface from the plurality of injection holes opened in the body, The openings of the injection holes are provided at the same distance from the work surface, and each axis of the plurality of injection holes is
Since they are provided parallel to each other at an oblique angle with respect to the work surface, the work surface whose surface has been scraped off does not cause fine unevenness or unevenness, and its flatness can be ensured. Since the direction in which the high-pressure water bounces on the work surface is constant and specified, it is advantageous in collecting polluted water and the like, and is particularly suitable for use in a green cut device.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a green cutting device.

FIG. 2 is a schematic configuration diagram of a green cutting device.

FIG. 3 is a schematic side view of an injection nozzle.

FIG. 4 is a side view of an injection nozzle.

FIG. 5 is a bottom view of the injection nozzle.

FIG. 6 is an enlarged view of an ejection hole portion.

FIG. 7 is a diagram showing the relationship between ultra high pressure water and the surface of concrete.

FIG. 8 is a diagram showing the relationship between ultra high pressure water and the surface of concrete.

FIG. 9 is a diagram showing the relationship between ultra high pressure water and the surface of concrete.

[Explanation of symbols]

 1 Green Cut Device 3 Ultra High Pressure Water Supply Unit 5 Work Vehicle Unit 7 Mud Collection Unit 511 Injection Nozzle 511A Nozzle Body 511B Injection Hole 5115 Opening

Claims (2)

[Claims] 1. From a plurality of injection holes opened in the body,
In an ultra-high-pressure water jet nozzle that jets ultra-high-pressure water toward a work surface, openings of the plurality of jet holes are provided at the same distance from the work surface, and each axis of the plurality of jet holes is An ultrahigh-pressure water jet nozzle, wherein the ultrahigh-pressure water jet nozzles are provided parallel to each other at an oblique angle with respect to the work surface. 2. The ultra-high pressure according to claim 1, wherein a sloped surface that obliquely intersects the work surface is provided at a position where the body faces the work surface, and the ejection hole is formed perpendicularly to the sloped surface. Water injection nozzle.