CN216614786U

CN216614786U - Anti-falling charging roller for large-bar-line heating furnace

Info

Publication number: CN216614786U
Application number: CN202122862339.0U
Authority: CN
Inventors: 杜书清; 孟亚北; 安文泰; 李林鹏
Original assignee: Gansu Jiu Steel Group Hongxing Iron and Steel Co Ltd
Current assignee: Gansu Jiu Steel Group Hongxing Iron and Steel Co Ltd
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2022-05-27
Anticipated expiration: 2031-11-19

Abstract

The utility model belongs to the technical field of steel rolling equipment, and relates to a cantilever roller assembly of a heating furnace of a bar rolling line, in particular to an anti-falling charging roller for a large bar heating furnace. The material loading roller is sleeved on the roller shaft, a key groove parallel to the length direction of the roller shaft is formed in the inner end face of the material loading roller, two threaded holes perpendicular to the length direction of the roller shaft are further formed in the inner end face of the material loading roller, the threaded holes are formed in two sides of the key groove, and an included angle of 120 degrees is formed between the threaded holes and the key groove. The utility model has the advantages of good anti-drop effect, simple processing operation and the like.

Description

Anti-falling charging roller for large-bar-line heating furnace

Technical Field

The utility model belongs to the technical field of steel rolling equipment, relates to a cantilever roller assembly of a bar rolling line heating furnace, and particularly relates to an anti-falling charging roller for the bar rolling line heating furnace.

Background

The material of the roller shaft of the cantilever roller of the heating furnace of the wine steel bar rolling line is as follows: 40Cr, charging roller material: ZG40Cr25Ni31W3 NbRe. Adopt the parallel key to be connected between roller and the roller of feeding, the cooperation between roller and the roller of feeding is: 130H7/130e 7; 140H7/140e7, interference: 0.081-0.125 mm, transmits torque by phi 36 x 100 flat key, realizes rotary motion. The cantilever roller is used on line after being assembled, the charging roller extends into the furnace, and the roller shaft is cooled by water in a circulating cooling mode. Because the charging roller works for a long time in the high-temperature environment of 1100 ℃ in the furnace, the connecting part of the charging roller and the roller shaft is heated to expand and deform, and the charging roller on the cantilever roller falls off under the action of impact load and self-rotation load when the bar billet is discharged from the furnace.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an anti-falling charging roller for a large-bar-line heating furnace, which solves the problem that a cantilever roller charging roller in the heating furnace is easy to fall off when being heated.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the anti-falling charging roller for the large-rod-line heating furnace comprises a roller shaft, wherein a charging roller is sleeved on the roller shaft, a key groove parallel to the length direction of the roller shaft is formed in the inner end face of the charging roller, two threaded holes perpendicular to the length direction of the roller shaft are further formed in the inner end face of the charging roller, and the threaded holes are formed in two sides of the key groove and form an included angle of 120 degrees with the key groove.

Further, an arc-shaped groove is formed in the transmission center of the charging roller.

The utility model has the following beneficial effects:

1. the threaded holes symmetrically formed in the positions of 120 degrees on the two sides of the key groove of the charging roller can be used for installing the fastening bolts to realize radial fixation between the charging roller and the roller shaft, so that the charging roller is guaranteed to form a stable connection structure in three directions on the roller shaft, and the anti-falling device is simple, reliable and good in anti-falling effect.

2. The arc-shaped groove is formed in the transmission central position of the charging roller, so that the bar blank can be guaranteed to move in the transmission central position of the charging roller all the time in the transmission process, the bar blank cannot generate outward thrust on the charging roller due to different positions of the bar blank on the charging roller, and the charging roller is prevented from being impacted and falling off by the bar blank under the condition of thermal expansion.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

in the figure, 1 is a charging roller, 2 is a roller shaft, 3 is a groove, 4 is a key groove and 5 is a threaded hole.

Detailed Description

The utility model is further explained below with reference to the drawings and the detailed description.

As shown in fig. 1-2, the anti-falling charging roller for the large-rod-line heating furnace comprises a roller shaft 2, a charging roller 1 is sleeved on the roller shaft 2, a key groove 4 parallel to the length direction of the roller shaft is formed in the inner end face of the charging roller 1, two threaded holes 5 perpendicular to the length direction of the roller shaft are further formed in the inner end face of the charging roller 1, and the threaded holes 5 are formed in two sides of the key groove 4 and form an included angle of 120 degrees with the key groove 4. The driving center of the charging roller 1 is also provided with an arc-shaped groove 3.

The specific implementation is that two threaded holes 5 with the diameter of 36mm are machined on two sides of a key groove 4 along the circumferential direction at the inner end of the existing charging roller 1, and threaded holes are also machined at the corresponding positions on a roller shaft 2; then, an arc-shaped groove 3 is processed at the transmission center position of the charging roller 1, and the depth of the groove 3 is determined according to the width of the bar blank transmitted on site. Then will load roller 1 and install on roller 2, load roller 1 the inner through the parallel key of arranging in keyway 4 and install the bolt in screw hole 5, realize that roller 1 inner and roller 2 are fixed to load, load roller 1 outer end and roller 2 end welded fastening. For safety reasons, the bolts can be welded to the charging roller 1 after tightening in the threaded holes 5. When the loading roller is used, the bar blank is always positioned in the groove 3 on the loading roller 1, so that outward thrust generated when the bar blank impacts the edge of the loading roller is avoided, meanwhile, the flat key in the key groove 4 and the bolt arranged in the threaded hole 5 can effectively eliminate the rotation load and expansion deformation borne by the loading roller, and the stable operation of the loading roller 1 on a cantilever roller in a heating furnace is ensured.

Claims

1. The utility model provides a big stick line is anticreep charging roller for heating furnace, includes roller (2), the cover is equipped with charging roller (1) on roller (2), its characterized in that: the inner end face of the charging roller (1) is provided with a key groove (4) parallel to the length direction of the roller shaft, the inner end face of the charging roller (1) is further provided with two threaded holes (5) perpendicular to the length direction of the roller shaft, and the threaded holes (5) are arranged on two sides of the key groove (4) and form an included angle of 120 degrees with the key groove (4).

2. The anti-drop charging roller for the large-rod-line heating furnace is characterized by comprising the following components in parts by weight: and an arc-shaped groove (3) is arranged at the transmission center of the charging roller (1).