SU1285027A1 - Device for cooling hollow cylindrical articles - Google Patents

Abstract

The invention relates to heat treatment and can be used for hollow articles, for example pipes. The purpose of the invention is to increase the uniformity and intensity of cooling. The device comprises a bath 1, in which a rotor 2 with gear wheels 4 is installed and a water supply system comprising feed pipes and nozzles 7.8. The tooth of the adjacent gear wheels 4 are shifted around the perimeter in one direction relative to each other. The tangent of the angle of displacement (rotation) of the teeth is 0.01775 - 0.035, the ratio of the distance between adjacent wheels to their radius. Such an offset ensures the transportation of products in bath 1 in the initial period at an angle of 1-2 °. to the horizon and the rapid removal of steam bubbles from the internal cavity. 6 Il. 0

Description

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The invention relates to the field of heat treatment and can be used to cool hollow articles, such as pipes.

The purpose of the invention is to increase the uniformity and intensity of cooling.

Figure 1 shows the proposed device; figure 2 - section aa in figure 1, fig.Z - section aa in figure 1 in figure 4 - section bb in figure 1 | on fig.Z - section bb In figure 1; figure 6 - section GG in figure 1

The device comprises a bath 1, in which a rotor 2 is rotatably mounted. The rotor is made in the form of a hollow hermetic barrel 3 with gear wheels 4 located around the perimeter. In the bath are installed slits 5 bent along the radius exceeding the radius of gear wheels 4. Bath equipped with a water supply system 6, made in the form of pipes with internal 7 and external 8 cooling nozzles mounted on them. A stop 9 is installed in front of the nozzles with holes 10 for the passage of water. Above the sides of the bath are beams 11 and 12, which are sloped to a horizontal plane in the transverse and longitudinal direction, respectively, 20-30 and. The longitudinal inclination of the beams 11 is opposite to the inclination of the beams 12.

Tooth, adjacent gears are offset along the perimeter in one direction - Lenin is a friend. relative to a friend by an angle, the tangent of which is 0.01775-0.035 of the ratio of the distance between adjacent wheels to their radius., t

The device works as follows.

A rotor 2 is rotated by a drive (not shown). The water supply from nozzles 7 and 8 is turned on. A tube 13 is heated along inclined beams 11 and rolls into bath 1 and is placed between the teeth of the wheels 4. Due to the offset around the wheels 4, each at a specified angle, the pipe is positioned between the teeth of the wheels at an angle of 1-2 to the horizontal plane. As the rotor turns, the inclination of the tube changes and on the lower forming part of the slide 5 it assumes a horizontal position. At the same time, the teeth of the wheels 4 of the rotor 2 that supported the pipe lose contact with it.

Further movement of the pipe 13 is carried out by the next number of teeth of the wheels 4. When the pipe 13 is raised upwards, it assumes an inclined position. The inclination of the pipe to the horizontal plane when lifting it up is the same as when lowering down, but in the opposite direction. Upon exit of the pipe 13 from the water due to its inclination from the internal cavity of the pipe flows into the bath. When the pipe 13 reaches the upper level of the slide 5, it rolls from the inclined surface the teeth of the wheels onto the beams 12, the slope of which in the transverse and longitudinal direction is the same as the inclined beams 11 for loading the pipe (in the longitudinal direction in the opposite direction).

In the process of continuous passage of the pipes 13 through the bath, their end sections pass by the nozzles 7, and during the step-by-step process of movement they stop against these nozzles. When the pipe ends coincide with the cross section of nozzles 7, the water coming from them passes through the internal cavity of pipes 13 at high speed. When the pipes leave the end nozzles, water jets wash the outer surface of pipes 13, accelerate the movement of water in the volume between the barrel 3 the rotor 2 and the body of the bath 1.

The water flowing out of the nozzles 8 (for external cooling) washes the outer surface of the pipes, creating: directional flow in the gap between the body of the bath 1 and the barrel 3 of the rotor 2

The number, shape and location of the end nozzles are chosen such that the ends of the pipes are as large as possible within the area of action of these nozzles (jets). In the stepping process of moving, the rotor stops with the pipes occur at the points where the axes of the nozzles and the pipes coincide.

An angle of inclination of a pipe of 1-2 ° (when loaded) is achieved by displacing gear wheels around the perimeter relative to each other by an angle whose tangent is in the range of 0.0175-0, 035 of the distance between adjacent wheels to their radius. The assigned values of the tangents of the displacement angles correspond to the indicated limits of the angles of inclination. The effectiveness of the proposed angles of inclination of the pipe and, accordingly, the angles of displacement of the wheels

was previously conducted experimentally. In comparison with the horizontal position of the pipe, its inclination equal to 1 ° (the difference in the levels of the front and rear ends of a pipe 12 m long is mm) reduces, all other things being equal, the time for steam removal from the internal cavity in 2- 3 times . Naturally, a further increase in the angle of inclination additionally reduces the time for removal of vapor formations, however, a structural angle of more than 2 ° cannot be performed, since for this it is necessary, such a significant displacement of the gear wheels.

Placing pipes at an angle of 1-2 on the loading side (in the first part of the bath) contributes to a more complete and quick removal of steam plugs from the internal cavity of the pipes, increases

uniformity and intensity of cooling.

Claims (1)

Invention Formula A device for cooling hollow cylindrical articles, comprising a bath, a rotor mounted therein, with gear wheels fixed along it with a certain pitch along the perimeter, and a cooling supply system with nozzles, characterized in that, in order to increase the uniformity and intensity of cooling Thus, the teeth of adjacent rings are displaced relative to each other along the perimeter in one direction by an angle whose tangent is 0.01775-0.035 of the ratio of the pitch between adjacent wheels to their radius. / l Phi ".3 13 at ; AND - „t with. P- . ff bJyS .. frfrrrrrrr rr n and in g V g 89do 6 in-in in to FIG. Fm.u Yr 6