RU2292249C2 - Rolled strip accumulating apparatus - Google Patents

Abstract

FIELD: apparatuses for accumulating rolled strip used in continuous tube welding and shape bending aggregates.

SUBSTANCE: apparatus includes vertical shaft; drive pulling rollers with bases mounted in staggered fashion on cross beams. Said cross beams and roller bases are in the form of common frames. Lateral centering rollers are mounted in said frames at both sides from drive pulling rollers with possibility of adjusting along width of rolled piece. Levers rotated from drive unit and carrying idle rollers are also mounted in frames. Arm value of said lever is selected in range of elastic deformation of accumulated rolled strip. Levers with idle rollers may be placed in different position by means of drive unit depending upon volume of accumulated strip.

EFFECT: simplified design, lowered metal consumption, reduced cost of making and maintaining apparatus, enhanced operational reliability, increased volume of accumulated strip, possibility for accumulated rolled strip of wide assortment.

3 dwg

Description

The invention relates to equipment for the production of pipes, and more specifically to a device for the accumulation of strip products and can most effectively be used in continuous tube welding and roll forming units.

In continuous pipe-welding and roll-forming units, as well as in units for coating, it becomes necessary to weld the strip ends of coils, the cycle time of which, depending on the type of welding (arc, continuous reflow), is 0.5-3 min.

For the non-stop operation of the above units, it is necessary to accumulate a sufficient length of the strip in the storage devices for docking rolls.

For the production of welded pipes with a diameter of 6-220 mm, spiral drives with vertical and horizontal axes of rotation are currently used.

Because of the high cost and structural complexity of spiral storage rings, electric-horizontal welding units (TESA 114-245, Vyksa Steel Works OJSC) and pit loop (TESA 203-530, Vyksunsky OJSC) are used in pipe-welding units for the production of pipes with a diameter of more than 220 mm metal plant ").

A device for the accumulation of strip hire (see French patent No. 1202297, class. 21 D, application. 13.03.58, publ. 08.01.60).

The known device contains a means of forming and aligning the loop, a vertical shaft with a variable pitch of the loops and movable in the horizontal plane from the drive carts, bearing rollers.

The disadvantages of the known device for the accumulation of strip products are the design complexity, large dimensions, metal consumption and the cost of manufacture and operation.

When using this design in the production of pipes with a diameter of 530 mm with a wall thickness of 12.3 mm and a welding speed of 30 m / min, the dimensions of the storage pit will be:

- width - 2000 mm;

- height - 14000 mm;

- length - 52000 mm.

In this case, the largest mass of accumulated tape will be 35 tons. With a tape length of 210 m in a roll and a surge speed of 60 m / min, significant dynamic loads occur in the elements of mechanical equipment and the foundation with a cycle of 7 minutes, which lead to the rapid destruction of mechanical equipment and the foundation of the pit.

To use the drive for a wide range of thicknesses, which require eliminating plastic deformations of the strip of the corresponding loop pitch, it is necessary to have several sets of interchangeable equipment. The drive requires considerable time to move from one step of the loops to another.

Of the known devices for the accumulation of strip products, the closest in technical essence is the device described in A.S. USSR No. 186951, class At 21 At 41/10, stated 04/29/63, publ. 10/11/1966

This device for the accumulation of strip products contains a vertical shaft, mounted in stepwise order on the transverse beams, drive pulling rollers with bases and tensioning rollers. The lower rollers of each odd pair of pulling rollers are non-driven and reclining with the help of hydraulic cylinders mounted on the walls of the shaft. Guides are fixed in the vertical side walls of the shaft, along which carriages with tension rollers can be moved in the vertical direction, suspended on chains.

A disadvantage of the known design of a device for the accumulation of strip products is the lack of reliability and durability of its operation due to low maintainability, since the carriage guides and the hydraulic cylinders for turning the lower pulling rollers are placed on the walls of a vertical shaft having a depth of 10-15 m.

Other disadvantages of this device design are the complexity of the design, high metal consumption and the cost of manufacture and operation, as well as the inability to use it for the accumulation of strip products with a thickness of 10-12 mm.

The objective of the present invention is to provide a device for the accumulation of strip products, which allows to increase the reliability and durability of its work, to ensure the accumulation of strip products of a wide range of thicknesses and to increase the volume of accumulated rental.

The next objective of the present invention is to simplify the design, reducing the metal consumption and the cost of manufacture and operation.

The problem is achieved in that in the device for the accumulation of strip products containing a vertical shaft and installed in stepwise order on the transverse beams, the drive pulling rollers with bases, according to the invention, the cross beams and the bases of the drive pulling rollers are made in the form of single common frames, equipped with both sides of the drive pulling rollers with lateral centering rollers, adjustable along the width of the strip, and rotary levers from the drive with idle rollers, while lever arm elichina chosen within the elastic strain accumulated rolled strip.

Such a constructive implementation of the device for the accumulation of strip products will increase its reliability and durability, to ensure the accumulation of strip products of a wide range of thicknesses and increase the volume of accumulated strip products.

This is achieved through the implementation of the transverse beams and the bases of the drive pulling rollers in the form of a single common frame, which allows to increase the rigidity and reliability of mounting the equipment on the foundation, and as a result, prevent breakdowns of both equipment and the foundation, and reduce the cost of maintenance (operation).

Side centering rollers more accurately set and accept the strip, which positively affects the durability of the equipment. Placement of idle rollers on the levers turning from the drive, deflecting the strip to the walls of the vertical shaft, makes it possible to more fully fill the shaft space and increase the amount of stock of the accumulated strip in the device. This circumstance is important in the reconstruction of operating units, when there is a need for the production of thicker-walled pipes and profiles in the absence of the possibility of expanding the production area.

The value of the lever arm is selected within the elastic deformations of the accumulated strip from the condition of the inadmissibility of the appearance of a strip of residual stresses in the body, which positively affects the durability of the equipment due to the limitation of the magnitude of bending moments acting on the strip during kinks, as well as the quality of the products (welded pipes , profiles, tape coatings).

In addition, the proposed design of a device for the accumulation of strip products has a lower metal consumption and manufacturing cost.

To explain the invention, a specific embodiment of the invention is provided below with reference to the accompanying drawings, in which:

figure 1 - shows a device for the accumulation of strip products;

figure 2 - place I in figure 1;

figure 3 is a view along arrow a in figure 1.

The device for the accumulation of strip products is a concrete recess in the form of a vertical shaft 1, elongated along the axis of the unit (not shown). On top of the vertical shaft 1 and on its sidewalls, pulling rollers 3 with bases 4 and rotational drives 5 are installed in stepwise order (step “c”) on the transverse beams 5. The cross beams 2 and the bases 4 of the pulling rollers 3 are made in the form of single common frames 6. Side centering rollers 7, adjustable in width of strip products, are placed on both sides of the pulling rollers 3. Depending on the width and the margin of the strip on the common frames 6, support rollers 8 can be installed. In addition, the levers rotary from the drive 9 are mounted on the common frames 6 10 s x Lost rollers 11, the magnitude of the lever arm 10 is selected within the elastic strain accumulated rolled strip. The levers 10 with idle rollers 11 using the actuators 9 can occupy three positions:

- "c" - when refueling a strip into an accumulation device;

- "d" - when the device is running with less bandwidth and in steady state;

- "e" - when the device is operating with a large amount of band accumulation.

The device operates as follows.

The strip 12 entering the device is threaded into the pulling rollers 3 and then centered by the side centering rollers 7. When working with the strip of the smallest accumulation volume, the levers 10 with idle rollers 11 occupy the “d” position. The concentrated strip 12 enters the support rollers 8 and then to the idle rollers 11 and, vertically freely lowering, forms a loop, and then goes to the next pulling rollers.

During the accumulation process, the strip is continuously removed from the output side.

When working with the strip with the largest accumulation volume, the levers 10 with idle rollers 11 occupy the “e” position and shift the strip 12 from the vertical position, while each loop practically fills the entire space of the shaft part limited by the vertical axis of steps and, thus, the accumulated stock is significantly increased. strips, which will increase the speed of welding strips of small thicknesses.

The proposed device for the accumulation of strips in comparison with the known ones will increase the reliability and durability of its work, ensure the accumulation of strip products of a wide range of thicknesses and increase the volume of accumulated rental.

In addition, the device will reduce the intensity and cost of manufacture and operation.

Claims (1)

A device for accumulating strip products, comprising a vertical shaft and drive pulling rollers with bases mounted in stepwise order on the transverse beams, characterized in that the cross beams and the bases of the driving pulling rollers are made in the form of single common frames provided with drive pulling rollers located on both sides side centering rollers, adjustable across the width of the strip, and rotary from the drive levers with idle rollers, while the size of the lever arm is selected within ugih strain accumulated rolled strip.

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