CN1714958A

CN1714958A - Water cooling method for guide and guards

Info

Publication number: CN1714958A
Application number: CN 200410023357
Authority: CN
Inventors: 任立军; 吴波; 向勇; 唐永辉
Original assignee: Central South University
Current assignee: Central South University
Priority date: 2004-06-28
Filing date: 2004-06-28
Publication date: 2006-01-04
Anticipated expiration: 2024-06-28
Also published as: CN100581669C

Abstract

The present invention belongs to the field of metallurgical machine, and is the cooling method of guide and guards for hot rolling steel rod or wire. On the support plate, in the planes corresponding to the circumference surface of the guide roller and in the planes corresponding to the upper and the lower end planes of the guide roller, water jetting holes and connected water pipes are set, so that cooling water is jetted directly to the circumference surface, upper end, lower end, upper bearing and lower bearing of the guide roller. The direct water jetting cooling method of the present invention has greatly improved cooling effect and makes the service life of the guide roller and the bearings over 20 hr.

Description

The guide and guards water-cooling method

[technical field] the invention belongs to field of metallurgical machine, relates to the cooling means of rolled steel bar or the used guide and guards of wire rod.

[background technology] steel rolling mill's rolled steel bar or wire rod all need to use guide and guards, with the high temperature billet steel exactly send into roll Pass.Deflector roll on the guide and guards directly contacts with the high temperature billet steel of high-speed motion, and it is overheated very easily to take place, and causes the hardness of deflector roll material to descend, and the deflector roll wearing and tearing aggravate and too fast inefficacy.The rolling bearing of installing on the deflector roll is in the hot operation state by the deflector roll indirect, also wear out failure very easily.Existing guide and guards all is provided with water cooling system.The method of being used widely is in the face of on the plane of deflector roll periphery hole for water spraying to be set in the gripper shoe of deflector roll, and the water of hole for water spraying ejection is directly injected on the periphery of deflector roll, and the periphery of deflector roll is cooled off.Also having a kind of method is on the mandrel that deflector roll is installed hole for water spraying to be set, and the water of hole for water spraying ejection changes direction under the effect of baffle plate, flow on the end face dividing plate of deflector roll, then flows on the periphery of deflector roll.The shortcoming of existing guide and guards water cooling system is: do not have cooling water to be directly injected on bearing and the deflector roll end face, two end faces of bearing and deflector roll can not be cooled off fully, the operating temperature that causes bearing is than higher, and the service life of bearing is very short, often has only 3 to 6 hours.

[summary of the invention] the objective of the invention is to improve significantly the deflector roll on the guide and guards and the water cooling effect of bearing, avoid deflector roll and bearing that the excessive phenomenon of hardness decline phenomenon and thermal stress takes place because of operating temperature is too high, thereby improve the wearability of deflector roll and bearing, avoid deflector roll and bearing to produce heat fatigue cracking, thus the service life of further improving deflector roll and bearing.

For achieving the above object, the method that the present invention taked is: on the gripper shoe of guide and guards, corresponding on the plane of deflector roll periphery and on the plane corresponding to the upper and lower end face of deflector roll, the feed pipe that hole for water spraying is set and links to each other with hole for water spraying, the cooling water of hole for water spraying ejection is directly injected to respectively on the periphery, upper surface, lower surface, upper bearing (metal), lower bearing of deflector roll, and guide and guards is cooled off.

In order to strengthen cooling to the upper and lower end face of deflector roll, on the plane of the upper and lower end face of the corresponding deflector roll of gripper shoe, feed pipe is the ring-type water pipe, corresponding hole for water spraying is evenly distributed on the ring-type water pipe, the hole for water spraying diameter is 4-6mm, and on the plane of the corresponding deflector roll periphery of gripper shoe, corresponding hole for water spraying is evenly distributed on the feed pipe, the hole for water spraying diameter is 4-6mm, and the hole for water spraying spacing is 15-20mm.

Adopt the present invention, make periphery, upper surface, lower surface, upper bearing (metal), the lower bearing of deflector roll all obtain directly water spray cooling, cooling effect is greatly improved, and all reach more than 20 hours the service life of deflector roll and bearing.

[description of drawings]

Fig. 1: structural representation of the present invention;

Fig. 2: A-A profile.

[specific embodiment]

Present invention is described below in conjunction with accompanying drawing.

1. as shown in Figure 1, deflector roll mandrel 5 is fixed on the gripper shoe 1, is provided with feed pipe in gripper shoe 1, and cooling water enters water pipe 10 by feed pipe 9, is ejected on the periphery of deflector roll 2 by 3 hole for water sprayings 6, and the periphery of deflector roll is implemented cooling; Cooling water enters water pipe 11 by water pipe 10, enters into annular conduit 13 again, is ejected into by 6 hole for water sprayings 7 on the upper surface and upper bearing (metal) 3 of deflector roll 2, and the upper surface and the upper bearing (metal) 3 of deflector roll 2 are implemented cooling; Cooling water enters water pipe 12 by water pipe 10, enters into annular conduit 14 again, is ejected into by 6 hole for water sprayings 8 on the lower surface and lower bearing 4 of deflector roll 2, and the lower surface and the lower bearing 4 of deflector roll 2 are implemented cooling.Use this cooling means, deflector roll service life is 20 hours, and existing cooling means improves 15 hours service life of deflector roll.

Claims

1. guide and guards water-cooling method, it is characterized in that: on the gripper shoe of guide and guards, corresponding on the plane of deflector roll periphery and on the plane corresponding to the upper and lower end face of deflector roll, the feed pipe that hole for water spraying is set and links to each other with hole for water spraying, the cooling water of hole for water spraying ejection is directly injected to respectively on the periphery, upper surface, lower surface, upper bearing (metal), lower bearing of deflector roll, and guide and guards is cooled off.

2. method according to claim 1 is characterized in that: on the plane of the upper and lower end face of the corresponding deflector roll of gripper shoe, described feed pipe is the ring-type water pipe, and corresponding hole for water spraying is evenly distributed on the ring-type water pipe.

3. according to claim 1 and 2 described methods, it is characterized in that: the hole for water spraying diameter that is distributed on the ring-type water pipe is 4-6mm, and on the plane of the corresponding deflector roll periphery of gripper shoe, corresponding hole for water spraying diameter is 4-6mm, and the hole for water spraying spacing is 15-20mm.