JPS6036592Y2 - Steam extraction device for continuous heat treatment equipment - Google Patents

Description

[Detailed explanation of the idea] The present invention focuses on parts to be processed (hereinafter referred to as parts).

) is heated in a heating furnace and then thrown into a quenching water tank to quench parts.

Conventionally, this type of continuous heat treatment apparatus 21 consists of a heating furnace 22, a quenching water tank 23, and a tempering furnace 24, as shown in FIG. The second belt conveyors 25, 26 are arranged so as to always move at a low speed.

Further, between the first and second belt conveyors 25 and 26, parts quenched in the quenching water tank 23 are transferred to a tempering furnace 2.
A third belt conveyor 27 is arranged so as to convey the food to the fourth place.

Further, a quenching water tank 23 is disposed directly below the terminal end of the first belt conveyor 25, and is configured such that all parts that naturally fall from the first belt conveyor 25 land in the quenching water tank 23.

An exhaust pipe 32 is arranged above this quenching water tank 23,
The opening surface of the exhaust pipe 32 is configured to cover a part of the water landing position of the component.

In this device, when the parts naturally fall from the first belt conveyor 25 and freeze in the quenching water in the quenching water tank 23, the high-temperature parts are cooled and a large amount of water vapor is generated at once.

This water vapor enters the heating furnace and disturbs the atmospheric temperature within the heating furnace, resulting in drawbacks such as variations in the hardness of parts.

The present invention aims to eliminate the above-mentioned drawbacks, and embodiments thereof will be described below with reference to the drawings.

In FIG. 1, 1 is a continuous heat treatment device, and a heating furnace 2
, a quenching water tank 3 and a tempering furnace 4.

Inside the heating furnace 2 and the tempering furnace 4, there is a first
and a second belt conveyor 5, 6 are arranged, further connecting the first and second belt conveyors 5, 6,
A third belt conveyor 7 is arranged to send the parts hardened in the hardening water tank 3 to the tempering furnace 4.

The first and second belt conveyors 5 and 6 are constructed so that a predetermined tension is applied to the endless belts 8 by a driving side rotating drum 9 and a driven side rotating drum 10, respectively.

A chute 11 having an inclined surface wider than the width of the belt 8 is arranged below the terminal end of the first belt conveyor 5.

The lower end of this chute 11 is submerged in the quenching water in the quenching water tank 3, and is further arranged above and close to the third belt conveyor 7.

Therefore, the parts falling from the terminal end of the first belt conveyor 5 are configured to land on the water at a position a predetermined distance away from directly below the terminal end of the first belt conveyor 5.

An exhaust pipe 12 is disposed above the chute 11, and the exhaust pipe 12 is configured such that its opening surface covers the water landing position of the parts in the quenching water tank 3 and also covers the falling position of the parts into the chute 11. has been done.

Further, near the upper end of the chute 11 is an injection nozzle 1.
3 is attached, and the quenching water sucked up from the quenching water tank 3 by a pump 14 is injected from this injection nozzle 13 along the chute 11.

In the above continuous heat treatment apparatus, the parts heated to a predetermined temperature in the heating furnace 2 naturally fall from the end of the first belt conveyor 5, reach the chute 11, slide on an inclined surface, and enter the quenching water tank 3. Land on the water.

At this time, the parts heated to a high temperature are cooled by quenching ice, and water vapor is generated.

This water vapor is transferred to the first belt conveyor 5 when the parts land on the water vapor.
Since the exhaust pipe 12 is placed a predetermined distance away from directly below the end of the water and above the water landing position, the water does not enter the heating furnace 2 and is discharged from the equipment through the exhaust pipe 12. Ru.

When the parts fall from the first belt conveyor 5, the quenching water is sprayed along the slope of the chute 11, so the parts slide on the slope of the chute 11 with almost no impact and are hardened. It lands in water tank 3.

In addition, although the quenching progresses on the chute 11 due to the water jet and steam is generated, the exhaust pipe 12 also covers the area above where the parts fall onto the chute 11, so that this steam is also reliably discharged from the exhaust pipe 12. Ru.

As explained above, the present invention makes the water landing position of the parts a predetermined distance away from directly below the end of the belt conveyor, and also sets the opening surface of the exhaust pipe to the water landing position of the parts and the position where the parts fall into the chute. Since it is configured so as to be covered, water vapor generated during quenching does not enter the heating furnace and disturb the atmospheric temperature inside the furnace, and there are advantages such as reducing variations in hardness of parts.

In addition, when the parts fall and reach the chute, the parts are not impacted by the jetted water and are not damaged at all, but the jetted water also hardens them so that no water vapor film is formed on the surface of the parts. It also has the advantage of improving the cooling efficiency of parts because full-scale quenching can be performed at the same time.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the entirety of the present invention, and FIG. 2 is a schematic diagram showing a conventional example. 1.21... Continuous heat treatment equipment, 2,22...
...Heating furnace, 3,23...Quenching water tank, 4,
24... Tempering furnace, 5, 25... First
Belt conveyor, 6゜26...Second belt conveyor, 7.27...Third belt conveyor,
...Belt, 9...Drive side rotating drum, 1
0... Driven side rotating drum, 11... Chute, 12.32... Exhaust pipe, 13...
...Injection nozzle, 14...Pump.

Claims (1)

[Claim for Utility Model Registration] Parts to be processed are placed on the belt 8 of the belt conveyor 5 that moves at low speed in the heating furnace 2, and as the belt 8 moves, the parts to be processed are heated to a predetermined temperature. In a continuous heat treatment apparatus in which parts to be treated are heat-treated by being thrown into a quenching water tank 3 by gravity from the end of the belt conveyor 5, one end is submerged in the quenching water tank 3 below the end of the belt conveyor 5, and an inclined surface is provided. Arranging the chute 11 having a surface,
The recessed position of the chute 11 is set a predetermined distance away from directly below the end of the belt conveyor 5, and an exhaust pipe 12 is installed above the chute 11, so that the opening surface of the exhaust pipe 12 is located at the water landing position of the parts to be processed. It is characterized by being shaped so as to cover the position where the parts to be processed fall onto the chute 11, and furthermore, a spray nozzle 13 is disposed at the upper end of the chute 11 so that the quenching water is sprayed along the chute 11. Water vapor removal device.