JPS6032884Y2 - Stepped roller conveyor for cooling wire rods - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a roller conveyor for cooling wire rods, and particularly to a stepped roller conveyor that can transfer coils of hot-rolled steel wire rods without any trouble.

In order to improve the conventional cooling method and equipment for steel wire rod after hot rolling, the present inventors used the heat retained in the wire rod to perform precise slow cooling of the steel wire rod to soften the material. Perfect slow cooling method and cooling device that can be timed.
A separate application has been filed (for example, Japanese Patent Application No. 116678/1984).

The outline of the cooling equipment will be explained based on FIG. 1.

In FIG. 1, 1 is a laying head of a winding machine installed following a hot rolling mill and a cooling device (not shown), and 2 is a wire ring that is continuously fed in a ring shape from the laying head 1. 3 is a roller conveyor on which the wire ring 3 is placed and transferred; 4 is a step conveyor (elevating conveyor) following the roller conveyor 2; 5 is a heat insulating cover that surrounds the wire ring 3 together with the step conveyor 4; The wire ring 5 is divided into a plurality of zones, and the wire ring 3 passing through the zone is cooled stepwise along a desired cooling curve to undergo transformation.

Further, 6 is a conveyor that transfers the wire ring 3 that has finished cooling after coming out of the heat insulating cover 5, 7 is an air blast cooling unit that rapidly cools the ring 3 on the conveyor 6, and 8 is a wire convergence device.

Wire ring 3 on the step conveyor 4 inside the heat insulation cover 5
The coils are transported in the form of non-concentric thick coils overlapping each other, and are unraveled at the step portions of the step conveyor 4 to remove heat (promote heat dissipation) from near the center of both sides of the coil where the coil density is high.

FIG. 2 shows the details of the stepped portion of the stepped roller conveyor 4. The thick coiled wire ring 3 that has reached the stepped position falls from the upper conveyor 4a onto the lower conveyor 4b, and at this time The rings are unraveled one by one and cooled by a refrigerant (air, inert gas, mist, water, etc. whose temperature is above atmospheric temperature or below the atmospheric temperature inside the heat insulating cover 5) from a refrigerant spray nozzle (not shown).

When the wire ring 3 falls, the leading edge of the ring may fall between the rollers of the lower conveyor 4b, as shown in 3a, and may impede the transfer of the ring.

Since the wire needs to be cooled while being transported at a predetermined speed, such a plunging phenomenon is undesirable because it causes interruption of the line and reduces productivity.

The object of the present invention is to provide a stepped roller conveyor for transferring and cooling wire rods that can almost completely prevent such a phenomenon in which a group of wire rod rings sticks between the rollers, and that can be easily modified to an existing roller conveyor. With the goal.

To achieve this purpose, the stepped roller conveyor of the present invention is a stepped conveyor that cools hot-rolled wire coils while continuously transporting them. The present invention is characterized in that a coil thrust prevention device made of a plate-like member is provided.

In this way, when the coil thrust prevention device is constructed of a plate-like member, if the plate-like member is made of a heat storage and/or reflective material, thermal compensation for the lower surface of the wire coil where the temperature drop is particularly large can be improved. It is also effective.

If the step conveyor 4 is movable up and down, as in the case of a tilting cheeple system, for example, the step value can be appropriately selected depending on the quality target of the wire to be cooled.

A specific example of the present invention will be explained below based on the drawings.

That is, as shown in FIG. 3, a coil thrust prevention plate 11 is interposed between each roller 9 constituting the step conveyor 4, thereby preventing the wire ring 3 from thrusting between the buttons.

The thrust prevention plate 11 may be formed in a T-shape as shown in FIG. 4 and fill at least the gap between the rollers at the center of the rollers 9, but it may also be provided over the entire length of the rollers in the axial direction.

If the thrust prevention plate 11 shown in FIGS. 3 and 4 is made of an iron plate or a stainless steel plate, the prevention plate 11 will also have the function of a heat storage plate or a reflection plate, and the wire rods transferred on the roller conveyor. It is also possible to suppress the temperature drop on the lower surface of the coil.

If it is desired to satisfy such a heat accumulation or reflection effect as well as the impact prevention effect, this prevention plate 11 is not only installed at the position corresponding to the fall of the coil on the lower conveyor, but also installed between all the rollers of the step conveyor. It is desirable to install a prevention plate 11 (see Figure 3).

In addition, when the thrust prevention plate 11 is made of a material that has a heat storage or reflection effect, it is extremely effective to compensate for the temperature of the lower surface of the coil if electric heaters (not shown) are placed on both sides of the prevention plate 11 in the roller axial direction. It is.

Since the present invention is constructed as described above, the wire ring 3
When a thick coil is transferred on a stepped roller conveyor, the tip of the coil does not stick between the rollers of the lower conveyor at the stepped position (peeling position), and transfers smoothly and stably onto the rollers. It will be sent to you.

As explained above, according to the step roller conveyor of the present invention, the wire rod ring does not stick between the three buttons and the rollers at the step position, so the wire rod can be conveyed smoothly and the occurrence of operational troubles can be reduced. , which greatly contributes to the continuous cooling process of steel wire rods.

Particularly when a plate material having a heat storage or reflection function is arranged between the rollers, it is effective not only to prevent the coil from protruding, but also to prevent a drop in temperature on the lower surface of the coil within the heat retaining cover.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a wire cooling line to which the present invention is applied, Fig. 2 is a side view showing the coil thrust state in the step conveyor of Fig. 1, Fig. 3 is a side view showing an example of the present invention, Fig. 4 The figure is a partially detailed perspective view of FIG. 3. 3... Wire ring, 4... Step conveyor, 9... Roller, 11... Push-in prevention plate.

Claims (1)

[Scope of utility model registration request] In a stepped roller conveyor that cools hot-rolled wire coils while continuously transporting them, between a plurality of rollers near the coil drop position of the lower conveyor at the stepped portion,
A stepped roller conveyor for cooling wire material, characterized in that it is provided with a coil thrust prevention device made of a plate-like member.