UA17356U - Device for cooling the rolled product on the sheet hot mills - Google Patents

Abstract

A device for cooling the rolled product on the sheet hot mills contains a closed container for cooling of fluid, supply conduit and U-shaped tubes. Closed container on entire length is divided by transverse partitions into airtight section, to each of which is provided the supply of cooling fluid bythe conduit, on which is mounted a cutoff valve. The removal of cooling fluid from each section is made at least through two U-shaped tubes located along the container in two staggered rows.

Description

Description of the invention

The useful model is related to rolling production and can be used for cooling rolled products 2 during transportation on intermediate and outlet roller conveyors of wide-strip and thick-sheet mills.

A well-known device for cooling wide-strip rolled products (patent OE 4335710A1, IPC 821845/02), which is a container with a rectangular side slot for cooling liquid. On the side of the exit of the cooling liquid (water) from the container, a device is installed in the form of a directional plate, which is located vertically to the cooled wide strip and two adjustable plates, as well as a pressure plate 70, which together form a flow channel that is adjustable in width. Such a device allows you to adjust the width of the gap, which is adjusted depending on the width of the cooled rolled product.

Disadvantages of this solution: - narrow range of changes in water flow; - in cooling modes, which involve a small flow of water, a rupture of the water curtain 75 across the width may be observed; - the use of sealing material for the manufacture of adjustable plates, which work in the zone of increased thermal load, leads to a change in their shape, compared to other steel parts.

This significantly affects the formation of a water curtain.

A cooling device was chosen as the closest analogue (patent EP 0235015U1, MPK B821845/021, which is a closed container along which O-shaped tubes (syphons) are located. When water is supplied, the container is filled with cooling liquid and then it is poured out from the O-shaped tubes in circular jets on surface of the rolled product. On both sides of the container under the siphons there are movable catch devices that divert part of the water flow. At the same time, the part of the flow that merges outside the width of the cooled rolled product is diverted. The catching devices are installed to the required width depending on the width of the cooled rolled product.

In the nearest analog, the shortcomings inherent in the previous design are excluded. The design of the device with

O-shaped tubes (siphons) allow: - to provide a wider range of coolant (water) consumption; - to exclude such a phenomenon as the rupture of the water curtain across the width, in cooling modes involving a small flow of coolant. yu

A significant disadvantage of the closest analogue is that the consumption of the coolant used in the cooling device does not depend on the width of the cooled rolled product. When cooling a wide rolled product, in order to ensure the necessary cooling regime, the water consumption is selected based on the cooling calculation of its maximum width. The closest analogue does not provide energy saving, i.e. coolant 3o (water), which is consumed in full, as in the mode of cooling rolled steel of maximum width. --

The useful model is based on the task of saving energy, i.e. coolant, and accordingly reducing the cost of finished rolled products while simultaneously improving its quality.

This task is solved due to the technical result, which consists in reducing the volume of supplied water "when cooling rolled products with a width less than the maximum. C 70 To achieve the above-mentioned result, a device for cooling rolled steel on sheet mills of hot rolling, which includes a closed container for cooling liquid, a supply pipeline and O-shaped

From" the tube, according to the useful model, the closed container along its entire length is divided by transverse partitions into hermetic sections, each of which is supplied with coolant through a pipeline on which a shut-off valve is installed, the coolant is removed from each section through at least two O-shaped шщ 45 tubes, located along the tank in two rows in a staggered order with a step of GI, which is chosen constructively from the condition: -и И «2а where 4 is the inner diameter of the O-shaped tubes, mm. o As a result of a comparative analysis of the proposed device for cooling wide-strip rolled products with 20 closest analogues, it was established that they have the following common features: - closed container for cooling liquid; ши - water pipeline; - O-shaped tubes; as well as distinguishing features: 29 - a closed container along its entire length divided by transverse partitions into airtight sections; c - coolant is supplied to each section through a pipeline on which a shut-off valve is installed; - cooling fluid is drained from each section through at least two O-shaped tubes; - O-shaped tubes located along the tank in two rows in a staggered order with step I, which is chosen 60 constructively from the condition:

And "2a where 4 is the inner diameter of O-shaped tubes, mm.

In this way, the proposed device for cooling rolled steel on sheet mills of hot rolling has a new structural design of nodes and parts, new connections of nodes and parts, as well as a new arrangement of them relative to each other.

There is a cause and effect relationship between distinctive features and the technical result achieved.

Due to the fact that O-shaped tubes (syphons) are located in two rows along the container in a staggered order with a GI step, it became possible to ensure a guaranteed overlap of the jets of cooling liquid (water) on the rolled surface. Due to this arrangement of siphons, water is evenly distributed across the width of the surface of the rolled product and the formation of temperature bands along the width of the surface of the rolled product is excluded, which will ensure an increase in the quality of the rolled product.

Due to the fact that the water supply to each section of the container is carried out through a separate pipeline, on which a shut-off valve with pneumatic control is provided, it became possible to provide the required width of the 7/0 cooling zone depending on the width of the rolled product.

The exclusion of at least one of the above-mentioned distinguishing features does not ensure the achievement of a technical result.

A useful model is explained by drawings that show:

Fig. 1 - a diagram of a device for cooling wide-strip rolled products;

Fig. 2 - view A of Fig. 1;

Fig. 3 - section B-B of Fig. 1.

The device for cooling rolled products on hot rolling mills consists of a closed container 1, which is a rectangular welded metal structure. On the upper surface of the container 17 there are O-shaped tubes (siphons) 2 (Fig. 1). Inside the container 1, transverse partitions 3 are installed, which 2o divide the tank into sealed sections 4 (Fig. 2). In each section 4 there are at least two O-shaped tubes 2, which are located along the container in a staggered manner. Siphons 2 are located with a step Y, which is determined constructively from the condition: I "24, where a is the inner diameter of the O-shaped tubes, mm (Fig. 3). The coolant is supplied to each section via pipeline 5, which is located under tank 1. On each pipeline 5, a shut-off valve 6 with pneumatic control is installed, which ensures the supply (or stopping of the supply) of coolant to the corresponding section in tank 1. Each pipeline is fed from the distributor collector 7. t

The device for cooling rolled products on hot rolling mills works as follows.

By supplying water through pipeline 5, each section 4 of container 1 is filled with cooling liquid, which flows through siphons 2 in a laminar stream onto the upper surface of the rolled product 8. Water is supplied to each pipeline 5 Gezo from the distribution manifold 7. By supplying cooling liquid through pipeline 9 to the central section in container 1, siphons 2 are activated and the first (minimum) cooling zone is formed. The central section with a capacity of 1 is configured for cooling rolled products of minimum width. The second cooling zone is formed by the flow of water from the siphons of the 2 central sections and from the siphons of the two sections that adjoin the central section on both sides. With the help of the second zone, cooling of rolled products with dimensions larger than the minimum size is provided. uh-

The developed design provides at least seven cooling zones across the width of the rolled product. Thanks to the location "-

of MO-like tubes in two rows along the container in a staggered order with a step of GI, which is chosen constructively from the condition: И "24, it became possible to ensure a guaranteed overlapping of the entire rolled surface with water jets (Fig. 3), thereby ensuring effective cooling of the finished rolled product and improve its quality.

Thus, the technical solution, which is implemented in the device for cooling rolled steel on hot rolling mills, according to the formula of the useful model, allows saving energy, that is, water, and with c, accordingly, reducing the cost of finished rolled steel while simultaneously increasing its quality.

Claims (1)

;" The formula of the invention is that , , - A device for cooling rolled products on sheet mills of hot rolling, containing a closed container for cooling liquid, a supply pipeline and O-shaped tubes, which is characterized by the fact that the closed container is divided by transverse partitions along its entire length into hermetic sections, to each of in which the cooling liquid is supplied through the pipeline, on which the shut-off valve is installed, the cooling liquid is removed from each section through at least two O-shaped tubes, located along the tank in two rows in a staggered order with step I, which is selected constructively from the condition: Ф І «29 where a is the inner diameter of O-shaped tubes, mm. p. 60 b5