CN113351648B

CN113351648B - Cooling water guide device for working roll of heavy plate mill

Info

Publication number: CN113351648B
Application number: CN202110823793.7A
Authority: CN
Inventors: 孙凯; 胡学忠; 邱兵; 杜炼; 唐家扬; 张陆鹏; 刘勇; 陈建波; 党平刚; 罗伟; 曾浩
Original assignee: Pangang Group Panzhihua Steel and Vanadium Co Ltd
Current assignee: Pangang Group Panzhihua Steel and Vanadium Co Ltd
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2022-06-10
Anticipated expiration: 2041-07-21
Also published as: CN113351648A

Abstract

The invention relates to the field of metal smelting, in particular to a heavy plate mill; the technical problem to be solved by the invention is to provide the cooling water guide device for the working roll of the heavy plate mill, which has a better water retaining effect. The cooling and water guiding device for the working roll of the heavy plate mill comprises a bearing seat and a roller, wherein the roller is fixed on the bearing seat, a guide plate frame, a water guide plate and a locking mechanism are arranged, the water guide plate is fixed on the guide plate frame and is tightly attached to the surface of the roller, the locking mechanism comprises a pawl and a ratchet wheel, the ratchet wheel is rotatably fixed on the bearing seat, two ends of the guide plate frame are rotatably arranged on the bearing seat, the pawl is fixedly connected with the guide plate frame, and the pawl is meshed with the ratchet wheel.

Description

Cooling water guide device for working roll of heavy plate mill

Technical Field

The invention relates to the field of metal smelting, in particular to a heavy plate mill.

Background

At present, the poor water retaining effect of the roller system of the heavy plate rolling mill at home and abroad becomes a common phenomenon, the cooling control quality of the roller system is a key link for controlling each procedure of hot rolling, and the method is particularly important for rolling high-quality hot rolled products. Because the roll system cooling water is improperly controlled, the difficulty of managing the precision of the roll system of the rolling mill is increased, and particularly, the roll system cooling water and the carried product iron scale powder act on the lower roll system to cause the precision of the rolling mill to be lost seriously, so that roll shifting is caused, and the series faults of the rolling mill are caused.

Firstly, a large amount of cooling water of the supporting rolls and the working rolls flows downstream through roll necks and shaft necks of the working rolls, so that the cooling water acts on the edges of hot rolled plate products, and large temperature deviation of the cross sections of the same plates is caused; the roller system cooling water mainly leaks from gaps among a roller neck of a working roller, a shaft neck and an upper guide frame, the cooling water carries oxide scales to seal four positions on the side of a bearing roller of the working roller and tightly abut against a retainer ring static sealing ring of the working roller, the retainer ring and a circular ring as well as 3 lip-shaped dynamic sealing functions of the retainer ring and a bearing seat, so that failure occurs in multiple sealing positions, the cooling water and the oxide scales enter the bearing to cause frequent wear and blocking faults, and a fault source for assembling the bearing of the working roller is formed;

secondly, due to the defects of design and assembly of the guide frame on the working roll, the cooling water of the working roll leaks seriously from the contact gap between the roll surface and the wiping block, the cooling water of the working roll acts on the cross section of the hot rolled plate product, the temperature drop difference of the cooled product occurs when the rolling speed drops, and the stability of the product structure performance is reduced. The design defect problem is shown in the figure, the gap between the clamping plate and the upper guide frame is not sealed, the problem that roller cooling water carries iron scales to enter the gap to block the clamping plate and a driving spring mechanism of the clamping plate exists, the wiping block cannot follow up with the roller surface to keep contact, water leakage occurs, sometimes the upper guide frame and the clamping plate are blocked, even the upper guide frame cannot be normally assembled and disassembled when the roller is taken off, and the assembly difficulty is high; the upper guide frame and the roll surface are designed to have a wedge-shaped dynamic pressure area structure, the cooling water of the roll cannot achieve the sealing effect through mechanism analysis, the contact force requirement of a fast-wiping material and the roll surface is high, even if the sealing is good, iron scales are accumulated at the bottom of the dynamic pressure area to form secondary abrasion on the roll surface and a block, and in addition, when the sealing is good, the cooling water flows out of the two sides of the guide frame to the roll surface to influence the temperature drop of the edge of a hot-rolled product;

thirdly, the cooling water of the working roll leaks from the gap between the outer side of the special-shaped upper guide frame and the guide device, so that the cooling water is scattered around the assembly of the working roll after the roll system is cooled, the surface of a hot-rolled product is cooled unevenly, and the product performance is influenced.

In conclusion, the technical management of the modern rolling mill on the roll system cooling water is very important, the existing design mode technology for cooling the roll system of the heavy plate rolling mill has the defects that the water guide method is backward, the fault rate is high, the improvement of the production quality of hot rolling products is restricted, the maintenance and repair difficulty is high, the operation has a safe hazard source, and the development requirements of high-quality cost reduction and efficiency improvement of modern enterprises cannot be met.

Disclosure of Invention

The technical problem to be solved by the invention is to provide the cooling water guide device for the working roll of the heavy plate mill, which has a better water retaining effect.

The technical scheme adopted by the invention for solving the technical problems is as follows: the cooling and water guiding device for the working roll of the heavy plate mill comprises a bearing seat and a roller, wherein the roller is fixed on the bearing seat, a guide plate frame, a water guide plate and a locking mechanism are arranged, the water guide plate is fixed on the guide plate frame and is tightly attached to the surface of the roller, the locking mechanism comprises a pawl and a ratchet wheel, the ratchet wheel is rotatably fixed on the bearing seat, two ends of the guide plate frame are rotatably arranged on the bearing seat, the pawl is fixedly connected with the guide plate frame, and the pawl is meshed with the ratchet wheel.

Further, the roller neck baffle is further included, the roller neck baffle is fixed at two ends of the guide plate frame, and the roller neck baffle is tightly attached to the roller neck of the roller.

Furthermore, one end of the water guide plate close to the roller is provided with a flexible material.

The invention has the beneficial effects that: the cooling and water guiding device for the working roll of the heavy plate mill comprises a bearing seat and a roller, wherein the roller is fixed on the bearing seat, a guide plate frame, a water guide plate and a locking mechanism are arranged, the water guide plate is fixed on the guide plate frame and is tightly attached to the surface of the roller, the locking mechanism comprises a pawl and a ratchet wheel, the ratchet wheel is rotatably fixed on the bearing seat, two ends of the guide plate frame are rotatably arranged on the bearing seat, the pawl is fixedly connected with the guide plate frame, and the pawl is meshed with the ratchet wheel.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a sectional view A-A;

FIG. 3 is a structural elevation view of the water guide assembly;

FIG. 4 is a schematic structural view of the locking mechanism;

parts, positions and numbers in the figures: the device comprises a bearing seat 1, a roll neck baffle 2, a roll 3, a water guide plate 4, a guide plate frame 5, a locking mechanism 6, a pawl shaft 601, a ratchet 602, a pawl 603, a sealing wiping plate 7 and a water cutting plate 8.

Detailed Description

The invention will be further explained with reference to the drawings.

As shown in fig. 1 to 4, the cooling and water guiding device for the heavy plate mill work roll comprises a bearing seat 1 and a roll 3, the roll 3 is fixed on the bearing seat 1, a guide plate frame 5, a water guide plate 4 and a locking mechanism 6, the water guide plate 4 is fixed on the guide plate frame 5, the water guide plate 4 is tightly attached to the surface of the roll 3, the water guide plate 4 is used for scraping cooling water on the surface of the roll 3, the locking mechanism 6 comprises a pawl 603 and a ratchet 602, the ratchet 602 is rotatably fixed on the bearing seat 1, two ends of the guide plate frame 5 are rotatably arranged on the bearing seat 1, the pawl 603 is fixedly connected with the guide plate frame 5, the pawl 603 is meshed with the ratchet 602, the ratchet 602 applies torque to the pawl 603 under the action of a torsion spring, so that the guide plate frame 5 fixedly connected with the pawl 603 rotates in a direction close to the roll 3, and the water guide plate 4 is tightly attached to the roll 3, even if the surface of the roll 3 is worn, the water guide plate 4 can be tightly attached to the surface of the roll 4, so that the cooling water on the surface of the roll 4 is scraped off onto the guide plate frame 5 and conducted out of the guide plate frame 5 to the outside of the rolling mill.

In order to prevent the cooling water on the roll neck of the roll 3 from being thrown out of the rolling mill, the invention also comprises roll neck baffle plates 2, the roll neck baffle plates 2 are fixed at two ends of the guide plate frame 5, the roll neck baffle plates 2 are tightly attached to the roll neck of the roll 3, and the roll neck baffle plates 2 scrape the cooling water on the roll neck of the roll 3 and guide the cooling water out of the rolling mill from the guide plate frame 5.

In order to improve the sealing performance between the water guide plate 4 and the roller 3 and improve the water wiping effect, a flexible material, such as a rubber strip, a sponge strip, or the like, is arranged at one end of the water guide plate 4 close to the roller 3, or a sealing wiping plate 7 and a water cutting plate 8 are arranged on the water guide plate 4, that is, a cavity is arranged on the water guide plate 4, a spring with one fixed end is arranged in the cavity, the other end of the spring is fixedly connected with the sealing wiping plate 7, the sealing wiping plate 7 is slidable in the cavity, the sealing wiping plate 7 is pressed on the roller 3 under the action of the elastic force of the spring so as to wipe off the cooling water on the roller 3, and the water cutting plate 8 is fixed at the end of the sealing wiping plate 7 and is generally made of a flexible material, such as rubber, sponge, or the like, preferably a wear-resistant flexible material, so as to improve the sealing performance between the sealing wiping plate 7 and the roller 3.

Claims

1. Heavy plate mill working roll cooling water guide device, including bearing frame (1) and roll (3), roll (3) are fixed on bearing frame (1), its characterized in that: guide plate frame (5), water deflector (4) and locking mechanism (6), water deflector (4) are fixed on guide plate frame (5), the surface of roll (3) is hugged closely in water deflector (4), locking mechanism (6) include pawl (603), ratchet (602) and torsional spring, ratchet (602) are rotationally fixed on bearing frame (1), the both ends of guide plate frame (5) rotationally set up on bearing frame (1), pawl (603) and guide plate frame (5) fixed connection, pawl (603) and ratchet (602) meshing, the torsional spring passes through ratchet (602) and exerts the moment of torsion to pawl (603) and makes guide plate frame (5) to the direction rotation that is close to roll (3).

2. The cooling water guide of the slab mill work roll according to claim 1, wherein: the roll neck baffle (2) is fixed at two ends of the guide plate frame (5), and the roll neck baffle (2) is tightly attached to the roll neck of the roll (3).

3. The cooling water guide of the slab mill work roll according to claim 1, wherein: one end of the water guide plate (4) close to the roller (3) is provided with a flexible material.