SU1371953A1 - Rollerway roller - Google Patents

Abstract

The invention relates to a lifting and transport machinery and m. used to transport pipes through cooling devices. The goal is to increase the reliability of the video. The body 2 of the roller is made with a biconical surface formed by annular protrusions 5 and cavities (c) 4. The latter are made with a depth equal to 0.25-0.4 of the smallest diameter of the biconical surface. The width of each B 4 and each protrusion 5 is 0.05-0.08 of the smallest diameter of the biconical surface. Thanks to the protrusions 5 located along the helix, the walls (c) 4 are the same. are provided with a tangential direction of water jets cooling the pipes. This reduces the resistance to the passage of water through the roller and does not create wedging stagnant zones that cause uneven cooling of the perimeter; Tubes. The ratio of depth B 4 to the smallest diameter of the biconical surface is optimal for irrigation densities in the zone of active cooling of pipes. The widths of the protrusion 5 and 4 are selected from the conditions of the operational durability of the protrusion 5 and the uniform cooling of the perimeter of the pipes. 1 hp f-ly, 3 ill. Miselium from € (L with vj cio 01 with Jig.1

Description

The invention relates to an overhead transport engineering, in particular to the construction of a roller used on roller conveyors transporting pipes through cooling devices.

The aim of the invention is to improve the reliability of the roller.

Figure 1 shows the roller of the roller conveyor ,, General view; figure 2 - section aa in figure 1; on fig.Z - roller, with the location of the projections on a helix general view.

The roller of the roller conveyor comprises an axis 1 with a casing 2 mounted on it with a biconical surface fixed against displacement by two stops 3.

On the surface of the housing 2, end depressions 4 and protrusions 5 are formed. The protrusions 5 are made in the form of closed rings.

In the middle part of the end of the roller casing there are holes in which the fingers 6 are mounted, rigidly connected to the roller casing, for example, by welding. Five to eight fingers 6 with a diameter of 10-15 mm are installed along the perimeter. The installation of the pins 6 makes it possible to increase the rigidity of the roller of the roller table when making pits with a maximum depth. The troughs are filled with a depth of 1 equal to 0.25-0.4 of the smallest diameter of the biconical surface, and the width of each trough and each protrusion is 0.05-0.08 of the smallest diameter of the biconical surface.

When pipes are cooled by jets that have, in addition to the axial direction of movement, also tangential, the protrusions 5 are made along a helical line (Fig. 3), which allows to obtain cavities with walls coinciding with the direction of movement of the jets and reduce the resistance to the passage of water through the roller.

When pipes are transported on rollers, water entering the gap between the surface of the roller and the pipe located on it has the ability to freely pass through depressions 4 and does not create wedging stagnant zones that cause uneven cooling of the pipe perimeter and, as a result, its curvature.

The ratio of depth 1 of trough 4 to the smallest diameter dB of roller 2 in the range of 0.25-0.4 is optimal

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for irrigation densities in the active cooling zone of 800-2000 .h when the supply angles of the cooler are 30-60 to the surface of the cooled tube and the distance from the sprayer to the roller of the roller table is 0.4-1.2 m. Decrease depth 1 of the troughs 4 is less than 0.25 The dB diameter of roller 2 causes uneven cooling of the perimeter of the pipe on the roller, due to the fact that as the depth of depression 4 decreases, the gap for water passage decreases and between the cooled pipe and roller, stagnant zones form and the intensity of cooling of this part of the perimeter increases. This, in turn, leads to a spiral-shaped curvature of the pipes during the quenching process, which is difficult to correct.

Increasing the depth of depression 4 to more than 0.4 dB in diameter of roller 2 is undesirable from structural considerations, since a further increase in the depth of depression 4 does not cause an increase in the uniformity of cooling of the pipe on roller 2, at the same time there is a danger of the roller 2 breaking. operation.

The width of the protrusion b and the hollow h within 0.05-0.08 of the dB diameter of roller 2 was chosen experimentally because of the operational durability of the protrusion 5 of the roller 2 of the roller table and uniform cooling of the perimeter of pipes up to 200 mm in diameter with a wall thickness of 14 mm transported on roller 2 ,

When reducing the width in and h less than 0.05 dB, the protrusions are observed during operation by the pipes being transported. Increasing the width in and h more than 0.08 dB leads to an increase in the non-uniformity of cooling along the perimeter of the pipe surface running on the roller. This is due to the fact that the contact area of the protrusion surface of the roller and the pipe increases - in these areas, stagnant zones from the incident flow of cooling water from the sprayer are formed, which leads to the surface being supercooling, i.e. increases the uneven cooling of the perimeter of the pipe.

The design of the proposed roller is more efficient in operation, since it allows the pipes to be transported, excluding their curvature during the quenching process.

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Claims (1)

1. A roller of the roller table, comprising a housing with a biconical surface formed by annular projections and valleys, characterized in that, in order to increase the reliability of the roller, the cavities are filled with a depth equal to 0.25-0.4 the least the diameter of the biconical surface, and the width of each trough and each protrusion is 0.05-0.08 of the smallest diameter of the biconical surface. 2 „Video 1, which differs from the fact that the protrusions are located along a helix. ////// h / srig.z