CN-121988744-A - Tightly-coupled gas atomization nozzle device with adjustable spray angle

Abstract

The invention provides a spray angle adjustable tight coupling gas atomization nozzle device, which comprises a square metal melt flow guide pipe 2, a gas resonance chamber 3, internal and external threads 4, an internal thread adjusting knob 5, a sliding cushion block 6, an adjusting wedge block 7, an air passage slide block 8, an air passage 9, an air guide groove 10 and an air vent. The invention relates to a fine design and improvement of a tightly-coupled gas atomization nozzle structure, and aims to provide a tightly-coupled gas atomization nozzle device with an adjustable spray angle, which improves the operability of powder preparation.

Inventors

• PAN JIAJING
• WANG JIYUAN
• ZHANG JUNMEI
• WANG ZIFU
• XIAO YANLING

Assignees

• 青岛科技大学
• 青岛天惠辰科技有限公司

Dates

Publication Date

20260508

Application Date

20241101

Claims (4)

1. 1. A spray angle adjustable close-coupled aerosolizing nozzle device, the device comprising: The device comprises a gas resonance chamber, a square metal melt honeycomb duct, a sliding cushion block, an air passage sliding block, an adjusting wedge block and the like.
2. 2. The apparatus of claim 1 wherein the four faces of the nozzle end of the metal melt conduit are formed with concave arcs of a radius, the concave arc on each face being adapted for rotation of the air passage slide on the abutment face.
3. 3. The apparatus of claim 1, wherein a sliding pad is fixedly arranged at the lower part of the gas resonance chamber, the pad is processed into an inward concave arc shape with the same radius for sliding the air passage slide block, the sliding pad is communicated with the gas resonance chamber, and a strip-shaped air guide groove is processed.
4. 4. The device of claim 1, wherein the air passage slide is a circular arc sphere with an inner side being more than one quarter circle, the radius is equal to the circular arc surface of the sliding cushion block, and one side of the air passage slide is processed into an inclined surface to be in close fit with the adjusting wedge block. The adjusting wedge block is tightly attached to the rotatable air passage sliding block, the adjusting wedge block is in an outer circular arc shape, the inner tangent plane is a planar wedge-shaped piece, and the outer circular surface is provided with a sealing external thread. The wedge block is moved by rotating the adjusting knob, and the air passage slide block is pushed to rotate.

Description

Tightly-coupled gas atomization nozzle device with adjustable spray angle Technical Field The invention relates to an atomization powder preparation nozzle device, in particular to a tightly coupled gas atomization nozzle device with an adjustable spray angle. Background The types of nozzles currently in widespread use in powder manufacturing technology mainly include free-fall nozzles and close-coupled nozzles. The free-falling nozzle, although of compact construction, is capable of handling the melt in a large tundish and achieving the process of pouring atomization, however, has a relatively low atomization efficiency, and the powder particles produced are relatively coarse, thus having limited applicability to the need for producing fine powders in a large-volume tundish. Early studies on close-coupled aerosolization techniques focused on exploring the correlation between median particle size and key process parameters (such as aerosolization pressure, gas flow rate, and melt flow rate, etc.), and revealed the positive effect of increasing gas-to-liquid flow ratio on refinement of powder particles. The current research trend focuses on the fine design and improvement of the tightly coupled gas atomization spray disc structure so as to further improve the atomization efficiency and the powder quality and meet the increasingly severe industrial production requirements. In the actual gas atomization pulverizing process, the gas flow speed is a key parameter of atomization breaking, the higher the speed is, the more favorable the fine powder yield is improved, but if the static pressure at the outlet of the flow guide pipe exceeds the atmospheric pressure, the outflow of the melt is blocked, and the melt back-spraying phenomenon occurs when serious, so that the atomization failure is caused. In practice, the preparation of powder with different fine powder rates is often difficult to realize by increasing the airflow speed at the outlet of the nozzle, and the fine powder yield is difficult to control, so most of the methods for preparing fine powder are to reasonably determine the jet angle of the air jet, so that the jet angle of the air jet needs to be selected by comprehensively considering the airflow speed and the static pressure, the outflow speed of the liquid flow in the tundish from the bottom of the guide pipe is slowed down, the gas-liquid phase ratio is increased, and the aim of preparing different fine powder rates can be achieved. However, this method generally designs a fixed injection angle, i.e. one nozzle is adapted to only one injection angle, and the nozzle needs to be replaced according to different requirements of molten liquid or powder preparation, which often has limitation in operation. Therefore, the design of the tight coupling gas atomization nozzle with the adjustable spray angle has urgent and important practical significance in the powder preparation process. Disclosure of Invention In order to solve the problems and improve the operability of powder preparation, the invention aims to provide a spray angle adjustable close-coupled gas atomization nozzle device which can adjust and provide a reasonable spray angle according to actual powder preparation requirements, thereby meeting corresponding working requirements and improving the efficiency of powder preparation. Therefore, the invention provides the following technical scheme: the spray angle adjustable tight coupling gas atomization nozzle device comprises a gas resonance chamber, a square metal melt flow guide pipe, a sliding cushion block, an air passage sliding block and the like, and is characterized in that the metal melt flow guide pipe is thick in pipe wall, the appearance of the metal melt flow guide pipe is square, and through holes in the metal melt flow guide pipe are used for circulating molten metal. A spray angle adjustable close-coupled gas atomization nozzle device is characterized in that four surfaces of a nozzle end of a metal melt conduit are processed into concave arcs with a certain radius, and the concave arc on each surface is used for rotating an air passage sliding block on the joint surface. A spray angle adjustable tight coupling gas atomization nozzle device is characterized in that a sliding cushion block is fixedly arranged at the lower part of a gas resonance chamber, the cushion block is processed into an inward concave arc shape with the same radius and is used for sliding an air passage sliding block, the sliding cushion block is communicated with the gas resonance chamber, and a strip-shaped gas guide groove is processed. A spray angle adjustable tight coupling gas atomization nozzle device is characterized in that a gas resonance chamber is in sealing connection with a sliding cushion block through argon arc welding. A spray angle adjustable tight coupling gas atomization nozzle device is characterized in that an air passage sliding block is a round surface with the inner side being m