JPS5922581B2 - Blow nozzle for cement and monolithic refractories - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a spray nozzle whose main purpose is to prevent nozzle clogging and ``sagging'' during spraying for tonnage or monolithic refractories.

[Background technology and problems]

One of the conventional methods of spraying cement or monolithic refractories is to mix water, binder, etc. into the spraying material and then spray the material, and these methods are divided into dry methods and wet methods.

In the wet method, in which a slurry is made in advance and sprayed from a nozzle using air pressure, sagging often occurs at the end of the nozzle due to the high moisture content.
In the case of a 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 the material and water are mixed, and even if the water is mixed, the water will not be absorbed again. The material separates from the spray nozzle, causing moisture to drip from the tip of the spray nozzle and fall, resulting in a decrease in adhesion.In addition, the falling material generally contains many components such as fine powder materials and binders. However, there is a lack of matrix in the adhesion area, resulting in a decrease in quality. In addition, when the space at the spraying work site is narrow and it is necessary to use short and small spray nozzles, the miscibility of the material and moisture becomes worse and more dust is generated, which seriously harms the work environment. . In the old days, it was designated as a special public service.
No. 1621 discloses a spraying device in which a cylindrical body made of rubber or synthetic resin is attached to the nozzle part to prevent coating in the nozzle hole, which inevitably vibrates due to the forced passage of fluid. However, in reality, the level of vibration caused by the passage of fluid cannot prevent coating, and is not useful for preventing the ``sag'' phenomenon. [Object of the invention]
The present invention is intended to solve the problems of the prior art, and its purpose is to completely prevent the above-mentioned problems, especially the coating inside the nozzle and the "sag" phenomenon, and to prevent adhesion. It is an object of the present invention to provide a spray nozzle that can improve efficiency and work environment.

[Summary of the invention]

The present invention provides a spray nozzle that has a fluid injection part at a required distance rearward from the tip, and a vibrating member is attached to the tip and an outer cylindrical body is attached to the outer periphery thereof with a gap for a gas flow path. By allowing gas to pass through the vibrating member, the vibrating force of the vibrating member is increased and sagging is prevented.

〔Example〕

The spray nozzle structure according to the present invention will be specifically described below with reference to the embodiments shown in FIGS. 1 and 2.

This embodiment is characterized in that the vibrating member 8 is vibrated not only by conveying (pressure feeding) energy but also by energy from compressed air flow.

In this embodiment, in the figure, 1 is a spray nozzle main body whose base end is connected to a material transfer hose 4 via a nipple 3, 5 is a water injection part provided on the base end side of the spray nozzle main body 1, and 6 is the water injection part. A water supply pipe 7 that spouts water into the spray nozzle body 1 through the water supply pipe 7 is a vibrating part that is detachably attached to the tip 2 of the spray nozzle body 1.

The vibrating part 7 is constructed by disposing an outer cylinder 10 concentrically around a vibrating member 8 having a truncated conical shape and having a vertically elongated slit 9.

The outer cylindrical body 10 has its base end attached to the tip 2 of the spray nozzle body 1 via the flange 20 in the same way as the vibrating member 8, and an annular compressed air passage 11 is formed between the vibrating member 8 and the outer cylindrical body 10. Furthermore, a compressed air inflow space 12 is formed around the base of the outer cylindrical body 10 and communicates with the compressed air flow path, and compressed air is allowed to flow into the air inflow space from an air supply pipe 13. . With the above configuration, the compressed air passes through the compressed air inflow space 12 and the compressed air inflow path 11 and is ejected from the jet port 8a, but in the above process, the compressed air can forcibly vibrate the vibrating member 8, and is conveyed. The vibration of the vibrating member 8 can be further doubled together with the vibration due to energy.

In the above embodiment, the vibrating member 8 may be made not only of rubber but also of a thin steel plate, and in this case, it is used with a rectangular notch cut at the tip.

Furthermore, the vibrating member 8 is not limited to a cylindrical body, but may also be sheet-shaped or chain-shaped. Further, although compressed air is used in the embodiments, an inert gas such as nitrogen gas or argon gas may also be used. Further, the length of the vibrating member 8 can be arbitrarily selected regardless of whether it is within or outside the length of the outer cylinder.

〔effect〕

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

(1) By strongly vibrating the vibrating member using conveyance energy and compressed gas energy, the mixing state can be promoted, the 1-sag phenomenon can be completely prevented, and the adhesion rate can be improved. can.

(2) Since the mixing state is improved as described above, dust generation can be reduced and the working environment can be improved.

(3) The quality of the deposited refractory can also be improved because the loss of the matrix due to the sagging phenomenon is reduced.

(4) Since the refractory sprayed from the spray nozzle is highly dispersed and uniform, the smoothness of the sprayed surface is improved. (5) Since the vibrating member vibrates strongly, coating inside the nozzle can be prevented.

[Brief explanation of the drawing]

FIG. 1 is an overall view showing a spray nozzle according to the present invention, and FIG. 2 is an enlarged explanatory view of essential parts of the spray nozzle shown in FIG. DESCRIPTION OF SYMBOLS 1...Spray nozzle body, 2...Tip part, 5...Water injection part, 7...Vibration part, 8...
... Vibration member, 9 ... Vertical slit, 1
0... Outer cylindrical body, 11... Annular compressed air flow path, 12... Compressed air inflow space.

Claims (1)

[Claims] 1. In a spray nozzle that has a fluid injection part at a required distance rearward from the tip, a special feature is that a vibrating member is attached to the tip and an outer cylindrical body is provided with a gap for a gas flow path on its outer circumference. Blow nozzle for cement and monolithic refractories.