CN-114798748-B - Roll collar cooling water nozzle

CN114798748BCN 114798748 BCN114798748 BCN 114798748BCN-114798748-B

Abstract

The application discloses a roll collar cooling water nozzle which is used for the technical field of bar hot rolling and comprises a spray header and a connecting rod connected with a water pipe, wherein the end face of the spray header, which faces to a material, is a working face, the working face is provided with a water spraying hole, the water spraying hole axially penetrates through the spray header and the connecting rod and is communicated with the water pipe, and the working face is also provided with a diffusion groove which is positioned at the periphery of the water spraying hole and used for diffusing cooling water. The connecting rod is connected with the water pipe, and the cooling water flows along the water spraying holes and finally is sprayed to the surface of the roll collar from the water spraying holes. The periphery of the roll collar is provided with a diffusion groove, when cooling water enters the diffusion groove, the pressure is reduced, and the cooling water flows along the diffusion groove in a diffusion way under the action of internal pressure and finally is sprayed to the surface of the roll collar. The diffusion groove plays a guiding role when cooling water diffuses and flows, so that the coverage area of spraying is enlarged, and the cooling effect of the roll collar is further improved.

Inventors

WANG ZONGBIN
ZHAO LISHENG
LIN CHUN
LI XIAOLONG
ZHANG WENTAO
FAN JIAWEN
CHEN SHUZHEN

Assignees

山东钢铁股份有限公司
山东钢铁股份有限公司

Dates

Publication Date: 20260421
Application Date: 20220608
Priority Date: 20220608

Claims (4)

1. The roll collar cooling water nozzle is characterized by comprising a spray header (1) and a connecting rod (2) connected with a water pipe, wherein the end face of the spray header (1) facing a material is a working surface, the working surface is provided with a water spraying hole (11), the water spraying hole (11) axially penetrates through the spray header (1) and the connecting rod (2) to be communicated with the water pipe, the working surface is also provided with a diffusion groove (12) which is positioned at the periphery of the water spraying hole (11) and used for diffusing cooling water, and the diffusion groove (12) can increase the spraying angle of the cooling water to more than 90 degrees; The bottom surface of the diffusion groove (12) is an arc-shaped surface, and the curvature radius of the arc-shaped surface is larger than the radius of the water spraying hole (11); The diffusion groove (12) is arranged along the diameter of an inscribed circle of the working surface, and the water spraying hole (11) is arranged at the center of the inscribed circle of the working surface; The width of the diffusion groove (12) gradually decreases from the middle to the two ends, and the cooling water can also fill the end parts of the diffusion groove (12) under the action of smaller pressure, so that the diffusion groove (12) is ensured to be filled with the cooling water; An arc transition surface is arranged between the bottom surface of the diffusion groove (12) and the side wall of the water spraying hole (11), and after cooling water flows out of the water spraying hole (11), the cooling water flows into the diffusion groove (12) along the arc transition surface under the action of the coanda effect, so that the cooling water is reduced to be directly sprayed out.
2. The roll collar cooling water nozzle according to claim 1, characterized in that the diameter of the water spray holes (11) is greater than or equal to 8mm.
3. The roll collar cooling water nozzle according to any one of claims 1 to 2, characterized in that the spray header (1) is in a hexagonal prism shape, the spray header (1) and the connecting rod (2) are coaxially arranged, and the water spray hole (11) extends along the axes of the spray header (1) and the connecting rod (2).
4. A roll collar cooling water nozzle according to claim 3, characterized in that the connecting rod (2) is cylindrical and provided with external threads on its outer periphery for connection to a water pipe.

Description

Roll collar cooling water nozzle Technical Field The application relates to the technical field of bar hot rolling, in particular to a roll collar cooling water nozzle. Background In the hot rolling production process of bars, the roll collar of the roll is the most important wearing part, and the condition of the roll collar in the use process can directly influence the production efficiency of the production line and the surface quality of the bars. In the hot rolling production process, heat is transferred to the roll collar, and the strength of the roll collar is reduced after being heated, so that the roll collar needs to be cooled. The cooling condition of the roll collar is the most important influencing factor in the hot rolling production process. Inadequate or insufficient cooling can directly lead to accelerated wear of the roll collar, severe cracking and falling off of the surface or roll breakage accidents. If the cooling effect of the roller collar is poor, after surface defects appear, the quality problems of scab, folding, pitting and the like can appear on the surface of the rolled material, and the apparent quality of the steel is directly affected. The cooling water nozzle in the prior art has the advantages of small cooling surface, small water quantity and poor cooling effect. The problem of serious roll collar fracture or abrasion often occurs in the production process. Therefore, how to improve the cooling effect of the cooling water nozzle on the roll collar is a technical problem which needs to be solved by the person skilled in the art. Disclosure of Invention The application aims to provide a roll collar cooling water nozzle, which is provided with a diffusion groove at the periphery of a water spraying hole, so that the cooling range of cooling water is enlarged, and the cooling effect of a roll collar is improved. In order to achieve the above purpose, the application provides a roll collar cooling water nozzle, which comprises a spray header and a connecting rod connected with a water pipe, wherein the end face of the spray header, which faces to a material, is a working face, the working face is provided with a water spraying hole, the water spraying hole axially penetrates through the spray header and the connecting rod to be communicated with the water pipe, and the working face is also provided with a diffusion groove which is positioned at the periphery of the water spraying hole and used for diffusing cooling water. In some embodiments, the bottom surface of the diffusion channel is arcuate with a radius of curvature greater than the radius of the water jet. In some embodiments, the diffusion channel is disposed along a diameter of an inscribed circle of the working surface, and the water jet hole is disposed at a center of the inscribed circle of the working surface. In some embodiments, the width of the diffusion channel tapers from the middle to the ends. In some embodiments, the diameter of the water jet is greater than or equal to 8mm. In some embodiments, the showerhead is hexagonally shaped, the showerhead is coaxially disposed with the connecting rod, and the water jet holes extend along the axes of the showerhead and the connecting rod. In some embodiments, the connecting rod is cylindrical and has external threads on its outer periphery for connection to the water tube. The application provides a roll collar cooling water nozzle which comprises a spray header and a connecting rod connected with a water pipe, wherein the end face of the spray header, which faces to a material, is a working face, the working face is provided with a water spray hole, the water spray hole axially penetrates through the spray header and the connecting rod to be communicated with the water pipe, and the working face is also provided with a diffusion groove which is positioned at the periphery of the water spray hole and used for diffusing cooling water. The connecting rod is connected with the water pipe, and the cooling water flows along the water spraying holes and finally is sprayed to the surface of the roll collar from the water spraying holes. The periphery of the roll collar is provided with a diffusion groove, when cooling water enters the diffusion groove, the pressure is reduced, and the cooling water flows along the diffusion groove in a diffusion way under the action of internal pressure and finally is sprayed to the surface of the roll collar. The diffusion groove plays a guiding role when cooling water diffuses and flows, so that the coverage area of spraying is enlarged, and the cooling effect of the roll collar is further improved. Drawings In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embod