JPS5835580B2 - Patenting device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a patenting device.

As shown in Figure 1, the current patenting furnace for hardening steel wire has a burner on the top of the long and narrow furnace.The burner heats the furnace wall red-hot and heats the steel wire uniformly, mainly through its width and heat transfer. It is guided outside the furnace, where it is cooled by cold air from a blower, and then wound up by a winder.

Alternatively, as shown in Figure 2, the steel wire to be treated is heated in the same manner as described above, as in a lead patenting device using a lead bath, and then cooled uniformly through molten lead outside the furnace to a temperature close to the melting point of lead. ing.

In these patenting devices, the length of the furnace is long to uniformly heat the steel wire, and since the combustion exhaust gas after heating is discarded, the thermal efficiency of the entire device is poor.

Furthermore, if the cooling method is simply wind cooling using a blower, the space required to cool the steel wires will be large, and if the cooling method uses a lead bath, there will be a problem of pollution caused by lead vapor.

The present invention solves these problems all at once.

The present invention will be explained based on the drawings.

FIG. 3 is a conceptual diagram of a patenting device according to the present invention, and FIG. 4 is a conceptual diagram of another embodiment of the patenting device according to the present invention.

In FIG. 3, a steel wire 2 to be treated is unwound from a switch 3 by driving a winder 1, passes through a fluidized bed portion of a preheating furnace 4 using a fluidized bed, and is preheated by the fluidized bed.

The hot air to the preheating furnace 4 using this fluidized bed is the combustion exhaust gas after the steel wire 2 to be treated is heated by the high speed gas burner 4 in the heating furnace 6, which will be described later. It is introduced into the lower part of the preheating furnace 4 used.

The steel wire 2 to be treated that has left the preheating furnace 4 enters the heating furnace 6 and is heated to a predetermined temperature by a high speed gas burner 9 provided on the ceiling of the heating furnace.

As shown in FIG. 3, this high-speed gas burner is attached to the ceiling of the heating furnace at a slight angle upward in the direction of flow of the steel wire to be heated, with respect to the direction perpendicular to the flow direction of the heated steel wire.

In this way, the steel wire to be treated is directly heated by the flame more uniformly, and local heating caused by the high-speed gas burner flame hitting a local part of the furnace is prevented.

Furthermore, since the convection heat transfer coefficient of heated hot air is increased compared to existing furnaces, the length of the furnace can be shortened.

A fresh air inlet 1 is provided on the suction side of the heat-resistant blower 8 to adjust the temperature and volume of hot air flowing into the preheating furnace 4.

The steel wire to be treated leaving the heating furnace 6 is cooled through a cooling furnace 5 using a fluidized bed and then wound up by a winder 1.

Cooling air for the cooling furnace 5 using a fluidized bed is introduced into the lower part of the cooling furnace 5 by another blower equipment (not shown).

If the preheating furnace and cooling furnace using the fluidized bed described above are used,
The heat storage effect in the fluidized particles increases the heat transfer effect, which, combined with the use of the exhaust gas from the heating furnace, increases the heating efficiency of the entire device, and requires significantly less space for cooling than conventional cooling. It has remarkable effects.

The one shown in FIG. 4 has, in addition to the above-described configuration, a part of the exhaust gas from the heating furnace being circulated to the cooling furnace 5 so that the cooling temperature of the cooling furnace can be adjusted as desired.

No. 13 is a system in which the cooling furnace is divided by furnace partitioning to change the cooling temperature of each section.

[Brief explanation of the drawing]

1 and 2 are conceptual diagrams showing the current patenting apparatus, and FIGS. 3 and 4 are conceptual diagrams of the patenting apparatus according to the present invention. 1... Winding machine, 2... Steel wire to be treated, 3
... Suit, 4 ... Preheating furnace using fluidized bed, 5 ... Cooling furnace using fluidized bed, 6 ...
... Heating furnace, 7 ... Fresh air intake, 8 ... Heat-resistant blower, 9 ... High-speed gas burner, 10 ... Burner, 11.・・・・・・
Blower, 12...Lead bath, 13...Furnace bulkhead.

Claims (1)

[Claims] 1. A preheating furnace using a fluidized bed is installed on the upper side of the heating furnace in the direction of flow of the steel wire to be processed, and a cooling furnace using a fluidized bed is installed on the lower side, and a high-speed gas burner is installed on the ceiling of the heating furnace. A patenting device, characterized in that the direction of the heating furnace is set at an angle slightly more than perpendicular to the flow direction of the heated steel wire, and the combustion exhaust gas of the heating furnace is used as the hot air for the preheating fluidized bed furnace.