RU2409436C1 - Device for improving for controlled cooling of rolled stock - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention aims at improving performances of rolled sheet cooling device. Proposed device comprises consecutive sections of intensive and low-intensity cooling, each comprising top and bottom drive rolls running in bearings fitted on bottom stationary frame and top frame moving vertically. Each section includes top and bottom collectors with water jets. Drive of each vertical moving frame is made up of four individual drives hinged in dual housing of bearing supports of the bottom drive rolls and pivoted to top moving frames and the beginning and end of each section. Proposed device incorporates guide rolls interacting with vertical guides of moving frames, and protective shields arranged on dual housings of bearing supports. Low-intensity cooling has horizontal guides secured on top moving frame. Bottom collectors are arranged to displace in horizontal plane, while each vertical collector incorporates support beams and is arranged to displace vertically and horizontally relative to the frames. Collectors incorporates water nozzles to feed air, while first drive roll runs in spring-loaded bearing support.

EFFECT: reduced overall dimensions, ease of maintenance.

9 cl, 9 dwg

Description

The invention relates to the field of sheet rolling production and can be used for controlled cooling of sheet metal with various heat treatment modes and in the line of the rolling mill, and as a stand-alone device.

A device for cooling sheet metal is known, comprising lower and upper drive rollers mounted respectively on a lower support beam and upper movable frames provided with screw drives for vertical movement along vertical guide columns mounted on both sides of the device. Between the rollers of the device are built-in nozzles for supplying water to the upper and lower surfaces of the chilled steel (Japanese Application No. 62-2884, B21B 45/02, C21D 8/573, publication 01/22/1987).

A disadvantage of the known device is the location of the drives for vertical movement of the upper frames above the rental (the drives are located in the zone of evaporation and elevated temperatures), and the cooling nozzles become available for repair only after dismantling the upper movable frames and rollers of the device, which complicates the maintenance of the sheet cooling system, and leaks are also possible oils from the drives of the vertical movement of the frames, their heating and deformation, there is no protection against the ingress of excess water (accumulates on the upper movable frames ah low-intensity cooling zones in the interval between sheets) on the end of the cooling plate, since it can disrupt the uniformity of mechanical properties along the length of the sheet.

The closest in technical essence and the achieved results is a device for cooling a steel sheet, consisting of at least one section of intensive cooling of the rolling stock, successively mounted along the rolling direction, containing lower and upper drive rollers installed in the bearing housing, respectively the lower stationary frame and the upper movable frame, and at least one section of low-intensity cooling of the rental containing the lower drive rollers installed in bearing housings on the lower stationary frame, the upper movable frame, each section containing upper and lower manifolds with nozzles for supplying water, drives for the vertical movement of the upper movable frames (article in the Japanese journal Tetsu-to-Hagane, 1984, v. 70, N11, p.A209-212 of the company Sumitomo Kinzoku Koge - prototype).

A disadvantage of the known device is that when servicing, cooling nozzles become accessible for repair only after dismantling the upper movable frames and rollers of the device, which complicates the maintenance of the sheet cooling system, there is no protection of the surrounding area from water splashes and direct thermal radiation, there is no protection against ingress of excess water (accumulates on the upper movable frames in areas of low-intensity cooling in the pause between sheets) at the ends of the sheet to be cooled, since uniformity of the mechanical properties along the length of the sheet.

The objective of the proposed device is to reduce its size, weight and provide convenient, fast and safe maintenance of the most important components of the device and the cooling system of rolled products, increasing the reliability of the design and meeting the requirements of technology for cooling and heat treatment of rolled products, for example, in part regarding rolling of rolled products in the intensive cooling and protection zone from the ingress of excess water (accumulates on the upper movable frames in the zones of low-intensity cooling in the pause between the leaves) on the ends of the cooled foxes This, since the uniformity of mechanical properties along the length of the sheet may be disturbed.

The problem is solved in that in a device for controlled cooling of sheet metal, consisting of at least one section of intensive cooling of the sheet, successively installed along the rolling direction, containing lower and upper drive rollers installed in bearing housings, respectively, on the lower stationary the frame and the upper movable in the vertical guide frame, and at least one section of low-intensity cooling of the rental, containing the lower drive rollers are installed e in the bearing housings on the lower stationary frame, the upper movable in the vertical guide frame, each section contains upper and lower manifolds with nozzles for supplying water, vertical movement drives of each upper movable frame, according to the invention, the drive of movement of each upper movable frame is made in the form of four individual drives, for example piston hydraulic cylinders, or in the form of four linear servo drives pivotally mounted on the bearing housings of the lower drive rollers, you doubled for two rollers at the beginning and at the end of each section and pivotally attached to the upper movable frames, the device is additionally equipped with guide rollers and protective shields mounted also on the double bearing housings, while the guide rollers are mounted to interact with the vertical guides of the moving frames , the section of low-intensity cooling is equipped with protective horizontal guides mounted on the upper movable frame, each lower collector with mounted between the lower drive rollers in horizontal guides of the lower stationary frames with the possibility of displacement in the horizontal plane, and each upper collector with nozzles is equipped with support beams, which are combined in the collector module and installed in vertical guide cells made on the upper movable frames, with the possibility of vertical and horizontal movement relative to these frames, while the nozzles of adjacent collectors are mounted with the possibility of displacement relative to each other ug, the device is also equipped with manifolds with nozzles for supplying air mounted on the upper movable frames at the beginning and at the end of each section as part of the corresponding upper collector modules for water supply, while the first upper drive roller is installed on the spring-loaded bearing bearings with the possibility of rolling vertical movement, and the remaining upper drive rollers are rigidly fixed to the movable frame by a wedge mechanism.

Also, the second and third upper drive rollers and the lower drive rollers opposite them are ribbed, while the ribs of the second and third rollers are offset from each other, and the steps of the first five lower drive rollers are larger than the next and their inter-roller space is overlapped by plates.

Also, from the side of the drives of the lower rollers, the guide rollers are made with flanges, and the axis of the drives of vertical movement of the upper movable frames are tilted towards the rolled.

Also, the protective screens of the intensive and low-intensity cooling sections are made with grooves for installing plates between adjacent lower drive rollers and form non-contact labyrinth seals with the necks of the drive lower and upper rollers and with movable upper frames.

Also, protective horizontal guiding sections of low-intensity cooling are connected to the upper movable frame through support-trays, which are installed between the nozzles of the water collectors, and the bottom of each support-tray is made with a slope to the non-drive side of the upper and lower drive rollers.

Due to the presence of these signs, it is possible to use the minimum steps of the drive upper and lower rollers, the dimensions of the device are also reduced, the conditions are improved and the service time of the sheet cooling systems is reduced, the reliability of the device is increased, technological requirements that improve the quality of the rolled products processed in the device are met, and installation electric drives of vertical movement of the upper movable frames when it is impossible to provide power to hydraulic drives or In the absence of hydraulics specialists. The proposed device for controlled cooling of sheet metal is shown in the drawings.

Figure 1 shows a side view of the sections of the device,

figure 2 is a section aa of figure 1,

figure 3 is a section bB of figure 2,

figure 4 - place D of figure 1,

figure 5 is a section bb In figure 2,

figure 6 is a section GG of figure 2,

figure 7 - place E of figure 3,

on Fig - place C of figure 3,

figure 9 - installation diagram of the ribbed rollers and water nozzles.

The device for controlled cooling of sheet metal consists of at least one section of intensive cooling of the sheet, successively installed along the rolling direction, containing lower and opposite upper drive rollers 1, 2 for covering rolling rolling, mounted respectively on the lower stationary frame 3 and on the upper movable frame 4, and at least one section of low-intensity cooling of the rental containing the lower drive rollers 1 mounted on the lower stationary frame 5, the upper movable frame 6. In this case, the first upper drive roller 2 of the intensive cooling section along the rolling direction is mounted with its bearings on the springs 7 with the possibility of vertical movement along the guide pins (not shown) of these supports under the influence of the rolling stock entering the device, and the remaining upper drive rollers 2 are rigidly fixed to the upper movable frame 4 by means of guide pins of the bearing bearings by a wedge mechanism (not shown in the drawing).

The second and third upper drive rollers 2 and the lower drive rollers 1 opposite to them, the intensive cooling section 1 are ribbed, the ribs of the second and third rollers are offset from each other, and the steps of the first five lower drive rollers 1 are larger than the next.

The lower drive rollers of the 1 sections of intensive and low-intensity cooling form the roller table of the device for controlled cooling of sheet metal.

Each cooling section contains upper 8 and lower 9 manifolds with nozzles 10 for water supply, vertical movement drives of the upper movable frames 4, 6. The drive of each section consists, for example, of four piston hydraulic cylinders 11 with integrated piston displacement sensors (not shown in the drawing) pivotally mounted on the housings 12 of the bearing bearings of the lower drive rollers 1, made double at the ends of each section and pivotally mounted on the corresponding upper movable frames 4, 6. Low-intensity cooling section I am equipped with protective horizontal guides 13, which are connected to the upper movable frame 6 through the support-trays 14 and are located between the nozzles 10 of the water collectors 8, and the bottom of each support-tray 14 is made with a slope to the non-drive side of the lower drive rollers 2 for the removal of reflected from the frame 6 of water coming from the lower nozzles 10 in a pause between passing rolling. In this case, the nozzles 10 do not protrude beyond the dimensions of the protective guides 13, which are located at a considerable distance from the barrel of the lower drive rollers 1, that is, the rolling passes through a zone of low-intensity cooling without being overwhelmed.

Each lower water collector 9 with nozzles 10 is mounted with its own guides (not shown) between the lower drive rollers 1 in horizontal guides 15 made on the lower stationary frames 3, 5 with the possibility of displacement of adjacent collectors 9 relative to each other in a horizontal plane. In the cooling sections, each upper collector 8 with nozzles 10 is equipped with two support beams 16, with which it is combined in the collector module and installed in vertical guide cells 17 on the upper movable frames 4, 6 with the possibility of vertical and horizontal movement at the time of its installation and dismantling. The collector modules mounted on the upper movable frames 4, 6 at the beginning and at the end of each cooling section are additionally equipped with air working manifolds 18 with nozzles 19 for supplying air. In the upper part of the movable frames 4, 6, distribution water and air manifolds 20 are installed, supplying the corresponding collector modules.

The upper movable frames 4, 6 of the cooling sections are also equipped with basic support protrusions (not shown) for setting the initial position of these frames and vertical guides 21 interacting with the guide rollers 22 mounted on the corresponding (at the edges of each cooling section) double housings 12 of the lower drive rollers 1. Moreover, from the side of the drives of the lower rollers 1, the guide rollers 22 are made with flanges.

On the double housings 12 of the lower drive rollers 1, shields 23 are installed, the joints of the shields 23 of the intensive and low-intensity cooling sections with necks (not shown in Fig.) Of the drive lower and upper rollers 1, 2 with movable upper frames 4, 6 form non-contact labyrinth seals moreover, the protective screens have grooves for installing plates 24 between adjacent lower drive rollers 1.

The drive movement of each upper movable frame 4, 6 instead of hydraulic cylinders 11 may contain four individual linear servos.

The operation of the device for controlled cooling of sheet and strip products is as follows.

Before the task of rolling the product heated to the desired temperature, in the device for controlled cooling in the intensive cooling section, a gap is established between the upper and lower drive rollers 1, 2 a little more than the thickness of the specified hire; In this case, the gap between the first along the metal upper 2 and opposite lower 1 drive rollers is set less than the thickness of the specified rental, which allows you to reliably set the rental in the device and cut off the flow of cooling water (the first upper roller lies on the outer surface of the rental) in the dimensions of the device, this it also contributes to blowing air on the outer surface of the rolled metal in the direction of its transportation in front of the first ribbed upper drive roller 2. In sections of low-intensity cooling, a significant the technological gap between the horizontal protective guides 13 and the lower drive rollers 1. These gaps in the intensive and low-intensity cooling sections change by the difference in thicknesses of the previous and subsequent rolled products for any thickness of the specified rolled products, which ensures a constant distance of the outer surface of the rolled products from the upper cooling nozzles 10 of the water collectors 8 , and hence the constancy of the cooling conditions of the hire. The adjustment of these distances is carried out by moving the upper movable frames 4, 6 by the hydraulic cylinders 11. The established gap in each section is fixed by locking the corresponding cavities of the hydraulic or pneumatic cylinders, and if the set pressure in these cavities is exceeded, the device increases the established clearances to the maximum using the hydraulic cylinders 11 and warped rolling is removed by the lower drive rollers 1 from the device.

Then the water supply to the upper 8 and lower 19 water collectors is turned on and a command is given for the task of the next rental to the device. At the same time, water from the lower collectors 9, reflected from the upper movable frame 6, is discharged by the support trays 14, protecting the front end of the rental included in the device from excess water and, therefore, from uneven mechanical properties along the length of the rental. The inclination of the axes of the hydraulic cylinders 11 in the direction of the axis of the roller table of the device can increase the lateral stability of the frames 4, 6 and reduce the load on the vertical guides 21.

The movement of each of the upper frames 4, 6 without significant distortions in the guides 21 is provided by the linear displacement sensors of the actuators 11 by comparing the displacement of the three actuators with the displacement of the fourth basic actuator.

The displacement of the water nozzles 10 of the adjacent collectors 8 relative to each other allows to obtain a more uniform cooling of the rolled surface and, accordingly, the minimum dispersion of the mechanical properties of the rental and its minimum deviation from flatness.

The inter-roll space of the first five lower drive rollers is covered by plates 24 in order to exclude the possibility of hot plastic rolling getting under the lower rollers 1.

Protective shields provide protection for service personnel and drives 11 of the upper and lower rollers 1, 2 during operation of the device from water jets and direct thermal radiation.

Any upper collector module 8 is replaced by a crane after it is disconnected from the corresponding distribution water 20 and air (not shown) collectors and from frames 4 or 6 without dismantling these frames.

Replacement of any lower water collector 9 is carried out by rigging after disconnecting it from the corresponding distribution manifold 20 with the collector 9 shifted in a horizontal plane along the guides 15 perpendicular to the supply direction of the rental outside the device.

The replacement of the upper and lower drive rollers 1, 2 is carried out after dismantling the upper movable frames 4 or 6 with a crane.

The use of a device for cooling and heat strengthening of sheet and strip products of the proposed design allows to improve the reliability and operating conditions of the device, to reduce its weight, dimensions and downtime during repairs, to expand its technological capabilities.

In the drawings, the positions indicated:

1 - lower drive rollers;

2 - upper drive rollers;

3 - lower stationary frame of the intensive cooling section;

4 - upper movable frame of the intensive cooling section;

5 - lower stationary frame section of low-intensity cooling;

6 - upper movable frame section of low-intensity cooling;

7 - spring;

8 - upper working water collector;

9 - lower working water collector;

10 - water nozzle;

11 - piston hydraulic cylinder with a built-in linear piston displacement sensor;

12 - a double housing of bearing bearings of the lower drive rollers;

13 - horizontal protective guides of the upper frame 6;

14 - support tray;

15 - horizontal guides for the lower manifold 9 on stationary frames 3, 5;

16 - supporting beam of the upper collector;

17 - vertical guide cells of the movable upper frames 4, 6;

18 - an air working collector;

19 - air nozzle;

20 - distribution water collector;

21 - vertical guides;

22 - guide rollers;

23 - a protective screen;

24 - inter-roller plate.

Claims (9)

1. Device for controlled cooling of sheet metal, consisting of at least one section of intensive cooling of rolled products, sequentially installed in the course of rolling, containing lower and upper drive rollers installed in bearing housings, respectively, on the lower stationary frame and the upper movable vertical guide rails of the frame, and at least one section of low-intensity cooling of the rolling stock, containing lower drive rollers installed in the bearing housing on the lower a stationary frame, an upper movable frame in vertical guides, each section containing upper and lower manifolds with nozzles for supplying water, vertical displacement drives of the upper movable frames, characterized in that the drive for moving each upper movable frame is made in the form of four individual drives - hydraulic drives or screw drives pivotally mounted on the bearing housings of the lower drive rollers, made double at the beginning and at the end of each section and pivotally attached to the upper movable frames, the device is equipped with guide rollers and protective shields mounted on the double housings of the bearing bearings, while the guide rollers are mounted with the possibility of interaction with the vertical guides of the moving frames, the low-intensity cooling section has protective horizontal guides mounted on the upper movable frame, each lower a manifold with nozzles is installed between the lower drive rollers with the possibility of displacement in the horizontal plane, and each upper the manifold with nozzles has support beams with which it is combined in the collector module and installed in vertical guide cells made on the upper movable frames, with the possibility of vertical and horizontal movement relative to these frames, while the nozzles of adjacent collectors are mounted with the possibility of displacement relative to each other, the device is equipped with manifolds with nozzles for air supply mounted on the upper movable frames at the beginning and at the end of each section as part of the corresponding upper ollektornyh water supply modules, while moving the first upper driving roller rolled intensive cooling section is mounted on spring-loaded bearing assemblies with the possibility of vertical movement, while the remaining upper drive rollers are rigidly fixed to the movable frame. 2. The device according to claim 1, characterized in that the upper drive rollers are rigidly fixed to the movable frame by a wedge mechanism. 3. The device according to claim 1, characterized in that the second and third upper drive rollers and the lower drive rollers opposite them are ribbed, the ribs of the second and third rollers being offset relative to each other, and the steps of the first five lower drive rollers more subsequent ones and their inter-roller space is blocked by plates. 4. The device according to claim 1, characterized in that the guide rollers on the side of the drives of the lower rollers are made with flanges. 5. The device according to claim 1, characterized in that the axis of the vertical movement drives of the upper movable frames are tilted towards the rental side. 6. The device according to claim 1, characterized in that the protective screens of the intensive and low-intensity cooling sections are made with slots for installing plates between adjacent lower drive rollers and form non-contact labyrinth seals with the necks of the drive lower and upper rollers and with movable upper frames. 7. The device according to claim 1, characterized in that the protective horizontal guide sections of low-intensity cooling are connected to the upper movable frame through the support-trays installed between the nozzles of the water collectors, and the bottom of each support-tray is made with a slope to the non-drive side of the upper and lower drive clips. 8. The device according to any one of claims 1 to 7, characterized in that each hydraulic displacement actuator is made in the form of a piston hydraulic cylinder with integrated sensors for linear displacement of the piston. 9. The device according to any one of claims 1 to 7, characterized in that each screw movement drive is made in the form of a servo drive.

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