JPS5840165A - Spray nozzle - Google Patents

Abstract

PURPOSE:To attempt the inhibition of dust formation during spraying a material, improvement in an adhesion rate, the inhibition of plugging caused by the adhesion of the material, etc., by attaching oscillating members to the front and the rear of the bent part of a nozzle. CONSTITUTION:In the case of a nozzle aimed at spraying at a right angle to a conveying pipe, the first oscillating body 3 is extended from a liquid-injecting part 2 to the vicinity of a bent part while the second oscillating body 5 is provided at the bent part from the rear of the bent part toward a spraying nozzle 1, and air injecting parts 4, 6 are provided to effectively operate each oscillating body. Consequently, each oscillating body 3, 5 has effects on the sufficient dispersion of a fluid into a material and the protection of the interior of the pipe from being coated with the material as well as the inhibition of dust formation because of the sufficient dispersion of the material water. In addition, the length l2 from the bent part to the spraying nozzle 1 can be shortened.

Description

[Detailed description of the invention] The present invention prevents dust generation during material spraying, improves adhesion rate, structure,
This invention relates to a spray nozzle whose main purpose is to prevent clogging and dripping due to material coating inside the nozzle and transport pipe.

One of the conventional methods of spraying various materials such as monolithic refractories for building materials is a dry method in which air (water or other liquid or gas such as oxygen, inert gas, air, etc.) is added at a nozzle.

When using a conventional nozzle in this dry method, the shorter the distance from the fluid addition part to the nozzle tip (spout opening), the shorter the
Dust generation increases, the adhesion rate to the surface to be blown decreases, and furthermore, the structure and quality of the adhering material deteriorates, and the tip of the nozzle sags.

The longer the distance from the fluid addition part to the nozzle tip, the more these conditions will be alleviated, but a new problem is that the inner wall of the transport pipe and nozzle will be coated with material, increasing the tendency for blockage. .

In particular, for a nozzle with a bent part intended for spraying in a direction perpendicular to (or at an angle close to) the transport pipe, (a) If there is a fluid addition part behind the bent part, block the bent part. Easy to occur. (Even if this does not occur, uneven ejection will occur) (Figure 1) (a) If the fluid addition part is located in front of the bend (on the ejection port side), there will be an increase in dust generation, a decrease in the adhesion rate, poor quality,
This causes the nozzle tip to droop. (FIG. 2) In the past, proposals have been made to use a vibrating body at the tip of a nozzle, and this has also been carried out by attaching a vibrating body to the tip (from the bent part to the spout) of nozzles having a bent part. (FIG. 3) As a result, the above-mentioned effects of preventing sagging, improving the adhesion rate, and reducing dust generation were achieved to some extent. However, in this case, the fluid (water) injection part is limited to between the bending part and the nozzle tip;
Water) and the material were not mixed sufficiently, and there were limits to reducing dust generation and improving the adhesion rate. Because of this pairing, it is necessary to increase the distance from the water injection part to the nozzle tip, and the DH
It was not suitable for spraying in narrow places such as the inner wall of the throat and the inner wall of the RH circulation pipe.

The present invention solves all of the above-mentioned problems at once, and also achieves a significant reduction in dust generation, a significant improvement in the adhesion rate, an improvement in structure and quality, and a uniform and stable ejection condition, while also improving the bending area. It is an object of the present invention to provide a spray nozzle in which the length of the portion from the bending part to the ejection port can be shortened.

The present invention relates to a spray nozzle characterized in that vibrating members are attached before and after a bent portion.

The structure of the spray nozzle according to the present invention is shown in FIGS. 4 and 7 below.
This will be specifically explained with reference to the embodiment shown in the drawings.

FIGS. 4 and 5 relate to the first embodiment and are schematic external views of a spray nozzle intended to be used perpendicularly to a transport pipe. In the figure, (1) is the injection part (where non-hydrogen bodies, air, inert gas, oxygen, binder, etc. are injected), (3) is the first vibrating body, and (4) is the first vibrating body. (5) is the air injection part (air, inert gas, oxygen, water and air may be used depending on the type of spray material and construction method) to make the vibrating body (rubber in the example) work effectively; (5) is the second vibration part. body (rubber in the example), (6) is an air injection part to make the second vibrating body work effectively (air, inert gas, oxygen, water and air may be used depending on the type of spray material and construction method), +71
is the 21st metal fitting for fixing the moving body, (8) is the metal fitting for fixing the first vibrating body, and (9) is the material pipe. In the above configuration, the first vibrating body (3) is effective in sufficiently dispersing the fluid (water) to the material and preventing coating of the material inside the pipe, and also prevents dust generation by sufficiently dispersing the material water. .

Further, the second vibrating body (5) provides the same effect as the 11i-th moving body. However, what is important here is that this vibrating body is installed from behind the bending part.

This makes it possible to completely eliminate material coating clogging at the bent portion, and furthermore, it is possible to shorten the length 12 from the bent portion to the spout.

FIG. 5 is a schematic view of the case where the nozzle is applied to a nozzle having a bent portion in order to eject at a certain angle θ° with respect to the transport pipe.

FIG. 6 relates to the second embodiment, in which the second vibrating body (5
) into which the first vibrating body (3) is inserted to form a double structure, and between the first vibrating body (3) and the second vibrating body (5) and the second vibrating body (5) at the rear of the bending part. Both vibrating bodies are mounted with a gap between them and the pipe α. In this case, the slits are located before and after the bent portion. Further, although the pipe is a rigid pipe, it can also be made flexible.

FIG. 7 is related to the third embodiment, and shows a pipe (10'
) is made flexible, and the pipe (10') can be bent freely by the drive rod (11), specifically, it can be brought to the dotted line position. In this embodiment, the slits of both vibrators partially overlap each other.

Although the first vibrating body (3) and the second vibrating body (5) were used in the above embodiments (first to third embodiments), two or more vibrating bodies can be provided at the bending part or before and after the bending part. In this case, a corresponding number of air inlets are preferably provided.

In addition to dry materials, spray materials include materials containing moisture called semi-dry materials. It can also be used when pitch, resin, etc. are used simply with gas without using sprayed water.

Further, the vibrating body is not limited to rubber, and may be made of other materials.

A spraying test was conducted to examine the spraying effect of the spraying nozzle according to the present invention, and the results are shown in Table 1.

Example: Sprayed refractory material use test Table 1

[Brief Description of the Drawings] Figures 1 to 3 are explanatory diagrams of various spray nozzles according to the prior art, Figure 4 is a longitudinal sectional front view of the nozzle according to the present invention, and Figure 5 is an explanatory diagram of various spray nozzles according to the prior art.
The figure is a longitudinal sectional front view of the modified example. FIGS. 6 and 7 are longitudinal sectional views of the second and third embodiments. 4rlA Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] 1. A spray nozzle having a bent part, characterized in that a vibrating member is attached before and after the bent part.