JP3788233B2 - Cleaning the concrete surface - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a concrete surface cleaning method, and more particularly to an improved technique of a cleaning method for cleaning a concrete surface with high-pressure water.
[0002]
[Prior art]
When constructing a concrete structure such as a dam body, the concrete surface is transferred over a considerably large area. In this case, the joint surface of the concrete is usually subjected to cleaning and cleaning processes to remove surface latency wrinkles and sand.
[0003]
In such cleaning and processing, since the area to be processed is large, high-pressure injection of water by a water jet is generally employed. Conventionally, a water jet cleaning and cleaning method has been mainly performed by a method in which an operator grips a hose provided with a nozzle for spraying high-pressure water in a fan shape at the tip, and is manually performed.
[0004]
When cleaning and cleaning by this method, the nozzles of the latency were swung away from the front, back, left and right, scraping the latency dredging and sand, and accumulating them toward the sand pump and vacuum pump.
[0005]
However, such conventional cleaning and cleaning methods have problems described below.
[0006]
[Problems to be solved by the invention]
That is, in the method in which the nozzle is gripped and the jet nozzle is sprayed by human power, the same portion must be cleaned about 5 to 6 times so as not to cause a lagance dredging or leaving behind sand. Even with a simple cleaning method, a leftover occurs, and if there is a leftover, it has to be scraped off with a brush or the like, which requires time and personnel for the cleaning work, and is an inefficient work.
[0007]
The present invention has been made in view of such conventional problems, and the object of the present invention is to provide a concrete surface that can efficiently perform cleaning operations without leaving any latency sand or sand. It is to provide a cleaning method.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has a plurality of nozzles for injecting high-pressure water in a row at a predetermined interval above the concrete surface to be cleaned, and fan-shaped from the nozzles adjacent in the axial direction. an injection region of the high-pressure water is injected to each other by overlap, in the cleaning method of one concrete move in parallel toward the side on the other side surface of the nozzle the concrete surface, of the nozzle relative to the concrete surface A cleaning method for setting an injection range of high-pressure water within a predetermined angle on the front side with respect to a parallel movement direction of the nozzle, wherein the nozzle includes a plurality of rotating bodies supported rotatably on a support shaft. Are arranged at equiangular intervals, and a plurality of the nozzle units are arranged along the axial direction of the support shaft, and the support shaft includes Provided bifurcated grooves corresponding to the predetermined angle at which communication between the supply passage of the high pressure water is provided inside said nozzle.
[0009]
According to the concrete surface cleaning method configured in this way, a plurality of nozzles for injecting high-pressure water are installed in a line, and the injection regions of high-pressure water to be injected in a fan shape from nozzles adjacent in the axial direction are mutually exceeded. Wrap and set the injection range of the high pressure water of the nozzle to the concrete surface within a predetermined angle on the front side with respect to the parallel movement direction of the nozzle, so the nozzle is moved from one side of the concrete surface to the other side. When moving in parallel, the latency ridges and sand are pushed by the high-pressure water and collected on the other side, thereby completing the cleaning of the concrete surface in a range corresponding to the plurality of nozzles arranged in a row.
[0011]
According to the configuration of the present invention, the size of the surface of the concrete to be cleaned can be easily accommodated by increasing or decreasing the nozzle unit.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. 1 to 4 show an embodiment of a concrete surface cleaning method according to the present invention.
[0013]
The cleaning method shown in the figure is a method that is applied when, for example, a concrete structure such as a dam dam body is constructed, in which concrete is transferred over a considerably large area, and the concrete surface to be cleaned A plurality of nozzles 12 for injecting high-pressure water W are installed above 10 at a predetermined interval.
[0014]
In the case of the present embodiment, the nozzle 12 is a nozzle unit 16 integrated with the rotating body 14, and in the case of the present embodiment, a total of six nozzle units 16 are made of concrete. It is arranged in a line above the surface 10.
[0015]
Each nozzle 12 injects fan-shaped or planar high-pressure water W having a predetermined angle α. As shown in FIG. 4, the nozzle 12 outwards from the center at equal angular intervals on the outer periphery of the rotating body 14. 6 are arranged in a radial pattern so that
[0016]
The rotating body 14 is rotatably supported on the outer periphery of a support shaft 20 in which a supply passage 18 for high-pressure water W is provided. A communication hole 22 that communicates with the supply passage 18 is formed inside the support shaft 20, and a bifurcated concave groove 24 that communicates with the communication hole 22 is curved on the surface side of the support shaft 20.
[0017]
According to the nozzle unit 16 configured in this manner, when the rotating body 14 rotates in the direction of the arrow in FIG. 4, only the nozzle 12 positioned within the angular range in which the concave groove 24 is provided is connected to the high pressure from the supply passage 18. Water W is supplied.
[0018]
That is, in FIG. 4, the high pressure water W is supplied only to the two nozzles 12 communicating with the concave groove 24, and the high pressure water W is not supplied to the other four nozzles 12.
[0019]
Therefore, the injection range in the vertical section of the high-pressure water W injected from each nozzle unit 16 to the concrete surface 10 is determined by the angle θ with respect to the center of the support shaft 20 of the concave groove 24, and the concrete surface is only within this angle range. High pressure water W is jetted to 10.
[0020]
In addition, rotation of the rotary body 14 shown by the present Example can also be rotated by reaction force at the time of injecting the high pressure water W, or can be rotated using power, such as a motor.
[0021]
The injection range in the vertical cross section of the high-pressure water W injected from each nozzle unit 16 to the concrete surface 10 is forward of the perpendicular to the concrete surface 10 extending from the center of the nozzle unit 16 as shown in FIG. The position B separated by a predetermined angle β is the injection start position, and the injection is performed within the range of the angle θ (the length on the concrete surface 10 is L) from this position.
[0022]
This angle θ is located on the front side of the moving direction (indicated by a white arrow in FIG. 1) when the nozzle unit 16 is translated from one side of the concrete surface 10 to the other side.
[0023]
Further, on the support shaft 20 side of the nozzle units 16 arranged in a line at predetermined intervals, as shown in FIG. 3, the horizontal distribution of the high-pressure water W sprayed in a fan shape from each nozzle unit 16 at an angle α. The injection regions in the cross section are adjacent to each other in the axial direction and partially overlap each other on the outer peripheral side.
[0024]
When cleaning the concrete surface 10 using the nozzle unit 16 configured as described above, a plurality of nozzles 12 for injecting the high-pressure water W are installed in a line, and the nozzles 12 adjacent in the axial direction are fan-shaped. The injection regions of the high-pressure water W to be injected overlap each other, and the injection range of the high-pressure water W of the nozzle 12 with respect to the concrete surface 10 is set at a predetermined angle with respect to the parallel movement direction of the nozzle 12 Since it is set within the range of θ, when the nozzle 12 is moved in parallel from one side of the concrete surface 10 toward the other side, the latency sand and sand are pushed by the high-pressure water W and collected on the other side. Thus, cleaning of the concrete surface 10 in a range corresponding to the number of nozzles 12 arranged in a row and the injection angle α is completed by one operation.
[0025]
In the case of the present embodiment, the nozzle 12 is a nozzle unit 16 in which a plurality of nozzles 16 are installed at equal angular intervals on a rotating body 14 that is rotatably supported by the support shaft 20. Since the unit 16 is disposed along the axial direction, the size of the concrete surface 10 to be cleaned can be easily accommodated by increasing or decreasing the nozzle unit 16.
[0027]
【The invention's effect】
As described above in detail, according to the method for cleaning a concrete surface according to the present invention, there is no latency residue or sand remaining, and the cleaning operation can be performed efficiently.
[Brief description of the drawings]
FIG. 1 is a side view of a cleaning operation state showing an embodiment of a concrete surface cleaning method according to the present invention.
FIG. 2 is a front view of FIG. 1;
3 is a plan view of FIG. 1. FIG.
4 is an enlarged cross-sectional view of the nozzle unit shown in FIG.
[Explanation of symbols]
10 Concrete surface 12 Nozzle 14 Rotating body
20 support shafts

Claims (1)

A plurality of nozzles for injecting high-pressure water are installed in a row at a predetermined interval above the concrete surface to be cleaned,
The high pressure water spray regions sprayed in a fan shape from the nozzles adjacent in the axial direction overlap each other,
In the concrete surface cleaning method of moving the nozzle parallel from one side of the concrete surface to the other side ,
A cleaning method for setting the spray range of the high-pressure water of the nozzle to the concrete surface within a predetermined angle on the front side with respect to the parallel movement direction of the nozzle ,
The nozzle is a nozzle unit in which a plurality of nozzles are installed at equal angular intervals on a rotating body rotatably supported by a support shaft.
While arranging the plurality of nozzle units along the axial direction of the support shaft,
A method for cleaning a concrete surface, wherein the support shaft is provided with a forked groove corresponding to the predetermined angle for communicating between a supply passage of high-pressure water provided therein and the nozzle. .

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