JPS631471A - Spray nozzle for cement and amorphous refractory - Google Patents

Abstract

PURPOSE:To prevent the clogging of a nozzle or a dripping phenomenon by promoting the uniform mixing of a spray material and moisture, by mounting a vibration member in a spray nozzle pipe and providing a supply port of compressed gas for vibration. CONSTITUTION:The material transferred into a spray nozzle pipe 1 from a material transfer pipe 3 is mixed with water injected from the water injection part 4 provided to the base end part of the nozzle pipe 1 in a mist form to be injected from the jet orifices 8 provided to the leading end part of the nozzle pipe 1. At this time, the vibration member 6 mounted in the nozzle pipe 1 is vibrated by the feed energy of the material supplied and further strongly vibrated by the slits 9 formed to the vibration member 6 so as to drive the same into a large number of sections to promote the mixing of the spray material. Since compressed gas is supplied to the nozzle pipe 1 from the gas supply part 10 for vibration of the vibration member 6, the material is perfectly mixed to be efficiently sprayed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a spray nozzle for cement, monolithic refractories, etc.

[Conventional technology]

Conventionally, one method of spraying cement or monolithic refractories is water. There is a method in which a binder or the like is mixed into a spray material and then sprayed, and these methods can be roughly divided into dry methods and wet methods.

[Problem that the invention seeks to solve]

In the wet method, that is, in the method in which the spray material is made into a slurry in advance and is injected from a nozzle using air pressure, sagging often occurs at the end of the nozzle due to the high moisture content. On the other hand, in the dry method, in which water is added or binder is added at the spray nozzle, the shorter the distance from the addition part to the spout, the less water is mixed with the material. The material separates and the water drips from the tip of the spray nozzle, and the falling material generally contains unevenly large amounts of components such as fine powder materials and binders. As the adhesion rate decreases, there is a lack of matrix in the adhesion area, resulting in a decrease in quality. Furthermore, if the spraying material and the curable binder are poorly mixed, the nozzle portion may be blocked and the spraying operation may be hindered. Furthermore, if the space at the spraying work site is narrow and short and small spray nozzles must be used, the above-mentioned materials and moisture will not mix well with each other, resulting in a large amount of dust, which can seriously harm the working environment. It had become. As a countermeasure for this, various measures have been taken in the past, and in the old Japanese Patent Publication No. 35-11621, a cylindrical body made of rubber or synthetic resin was attached to the nozzle part so that it would vibrate due to the forced passage of fluid. There is a known spraying device that prevents coating inside the nozzle hole, but since the nozzle was formed of a thick-walled cylindrical body, the vibration caused by the passage of the fluid is small, and such vibration cannot prevent coating. Moreover, it was not useful for preventing the "sagging" phenomenon.

The purpose of the present invention is to solve the problems of the prior art, and to help uniformly mix the spray material and moisture, thereby completely preventing nozzle clogging and "sagging" phenomena. The object of the present invention is to provide a spray nozzle that can thereby improve the adhesion rate of spray material and improve the working environment.

[Means for solving problems]

In the spray nozzle for cement and monolithic refractories of the present invention, a vibrating member is installed in a spray nozzle pipe that is connected to a material transfer hose and has a fluid supply section, and a gas supply section for blowing into vibrating material B is attached to the nozzle pipe. The above objective was achieved by providing the following.

The vibrating member may be made of a core steel plate, rubber, or a flexible or elastic material, and its base end may be provided at any location between the fluid supply section and the nozzle outlet.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the nozzle of the present invention is applied to a dry method will be described below with reference to the attached drawings. FIG. 1 is a diagram showing the overall structure of a spray nozzle of the present invention, and FIG. 2 is a diagram showing a vibrating member and the manner in which it is attached.

Referring to FIG. 1, 1 is a spray nozzle pipe whose base end is connected to a material transfer hose 3 via a nipple 2, 4 is a water injection part provided in the spray nozzle pipe 1, and 5 is a water injection pipe 14 for spraying water. A water supply pipe that spouts water into the nozzle pipe 1; 6 is a spray nozzle pipe l;
shows the vibrating member attached via the flange 7.

As shown in FIG. 2, in the vibrating member 6, slits 9 can be cut in the periphery of the spout 8 at approximately equal circumferential intervals in a direction parallel to the @ line, and the cutting length of the slits 9 depends on the working conditions. It can be changed arbitrarily.

The gas supply section 10 provided on the mounting flange 7 of the vibration member 6 provided on the spray nozzle pipe 1 forms an annular gas flow path 11 between the spray nozzle pipe 1 and the vibration member 6, and A compressed air inflow space 12 communicating with the annular gas flow path 11 is formed around the base, and the air inflow space l
2, an inert gas such as compressed air, nitrogen gas, argon gas, etc. is blown onto the vibrating member 6 from the gas supply pipe 13.

In the nozzle of the present invention, the material transferred from the material transfer hose 3 into the spray nozzle pipe l is mixed with water in the form of a spray at the water injection part 4 provided at the base end of the nozzle pipe, and is further mixed into the nozzle. The vibrating member 6 attached to is vibrated by the conveying energy of the feed material. By dividing the vibrating member 6 into a plurality of parts with the slit 9, the vibrating member 6 is vibrated strongly by the conveyance energy. As a result, the spraying material is completely mixed and ejected from the ejection port 8, and is sprayed onto the workpiece.

Further, the compressed gas supplied from the vibration gas supply unit 10 of the vibrating material 6 is ejected from the ejection port 8 through the inflow space l2 and the flow path l1.

In the embodiments described above, the nozzle of the present invention is applied to a dry method, but it is of course applicable to a wet method as well.

〔Effect of the invention〕

As described above, the spray nozzle according to the present invention can achieve the following effects.

(1) A vibrating member is installed inside the spray nozzle pipe, and the vibrating member can be strongly vibrated by the vibrating gas supplied through the gas passage, which can promote mixing, completely prevent the "sagging" phenomenon, and increase the adhesion rate. It is possible to improve the

(2) Since the mixing state of the spray material is improved, dust generation can be reduced and the working environment can be improved.

(3) Since the loss of the matrix due to the "sag" phenomenon is minimized, the quality of the adhered refractory can also be improved.

[4] Since the refractory spray from the spray nozzle is highly dispersed and uniform, the smoothness of the surface to which it is sprayed is improved.

(5) Since the vibrating member vibrates strongly, coating inside the nozzle can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the overall structure of a spray nozzle of the present invention, and FIG. 2 is a diagram showing a vibrating member and the manner in which it is attached. 1: Spray nozzle pipe 2: Nipple 3: Material transfer hose 4: Water injection part 5: Water supply pipe 6: Vibrating member 7: Flange 8: Spout 9: Slit 10: Gas supply part 11:! L-shaped gas flow path 12: Compressed air inflow space 13: Gas supply pipe Patent applicant Kurosaki Ceramics Co., Ltd. Representative Masu Kobori (2 idiots) No. 1
Figure 2

Claims (1)

[Claims] 1. Cement and monolithic refractory, characterized in that a vibrating member is attached to a blowing nozzle pipe connected to a material transfer hose and having a fluid supply part, and a gas supply part for blowing into the vibrating member is provided in the nozzle pipe. Spray nozzle for objects.