JPS6028848A - Sprayer for preventing dust in natom method - Google Patents

Abstract

PURPOSE:To assure clean working environment in the case of applying spray concrete in an NATOM method by cleaning the powder generated in said case by water pressure or steam spraying. CONSTITUTION:A circular water feed pipe or steam pipe is disposed in the range where the diffusing cone of gushing concrete is not interfered and several spray nozzles 5 are attached approximately in parallel to the circular pipe in the case of applying spray concrete by a concrete nozzle 1 in an NATOM method. The water feed pipe or steam pipe ring is supported by a series of sprayers attached to the nozzle 1 and operates cooperatively with the nozzle 1. The air or steam is thus sprayed near the source for generating the dust and the greater part of the dust is captured at the source for generating the same, by which an extremely high effect is obtd. in cleaning the working environment in a mine.

Description

[Detailed Description of the Invention] In recent years, when constructing tunnels, natom construction has become the mainstay, compared to the traditional shoring construction method. In the case of the Natomue method, the strength of the other piles is effectively utilized by roughly combining one blown Iq concrete with rock bolts I + steel shoring for the other piles,
It is a very rational construction method that collectively retains the ground (after excavation, the principle is to apply shotcrete to suppress the loosening of other mountains); It is a construction method that builds concrete walls and suppresses the above-mentioned loosening, and there are 9 cases in which the concrete collides with other walls (at the same time, some parts are rebound,
In addition, some of it is dispersed into the air as dust (wet methods produce less dust), creating a very poor work environment in the work area, which is a serious problem in terms of health management for workers. Of course, this could be solved by installing expensive dust collectors and ventilation equipment, but it would be difficult to implement if you also consider medication issues and workability issues. As a countermeasure, the aim is to reduce dust and ensure a healthy working environment using simple equipment.

Figure 1 is a schematic diagram of concrete being sprayed inside a tunnel.The original form is that the concrete nozzle blows at a right angle about IM away from the wall surface, and as a matter of course in the heat of the year, the sprayed concrete spreads over a certain width. Since the cone collides with the wall, place a circular water supply pipe or a steam pipe in a range that does not interfere with this diffusion cone, and install several spray nozzles in this circular pipe parallel to the wall (spray 1) This water pipe or steam pipe ring is supported by a series of spouting devices, which are attached to the concrete nozzle as shown in Figure 2, to prevent the new wall from becoming unnecessarily wet. Works together with concrete nozzle.

As described above, this invention operates in unison with the concrete nozzle, and moreover, it ejects spray near the source of the dust and catches most of the dust at the source.
It is extremely effective in purifying the industrial environment, and is an effective device for the construction of a single tunnel, as well as for occupational safety and health.

[Brief explanation of the drawing]

The figures show the outline of this dust control system. Figure 1 is a schematic diagram of the tunnel interior blowing 4"I jrlA construction, Figure 2 is an elevation view of the equipment, Figure 3 is a detailed side view, The drawing is a detailed front view. 1. Teikoku Concrete Spraying X/L. 2. Concrete hose 36. Blow-up robot 4000 sprays, equipment 5000 sprays, 6000 water (steam) hose drawings. - (Changes to the content/No changes) 431 ← Written amendment to complaint procedure (method) January/2nd, 1980 Commissioner of the Japan Patent Office Kazuo Wakasugi Indication of case 1 Patent application No. 58 of 1988- 135098
Relationship with 111 persons making amendments to the name of the patent applicant 4. Oral notice of the order for amendment to patent applicant 4. October 25, 1988 5. Symmetry of the sleeve correction Drawing 6. Contents of the sleeve correction )

Claims (1)

[Claims] When applying shotcrete using the Natomue method,
A spray device that cleans generated dust using water pressure or steam spray.