Multi-chamber heat treatment device

Patent metadata

Field	Value
Publication number	US-10488115-B2
Application number	US-201715646489-A
Country	US
Kind code	B2
Filing date	Jul 11, 2017
Priority date	Mar 4, 2015
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A multi-chamber heat treatment device according to the present disclosure in which heating chambers are disposed with an intermediate transport chamber interposed therebetween in a top view, and a treatment object is stored in a heating chamber via the intermediate transport chamber, wherein the multi-chamber heat treatment device includes a gas cooling chamber which cools the treatment object using a cooling gas; and a cooling gas circulation device which includes an gas inlet and a gas outlet.

First claim

What is claimed is:

1. A multi-chamber heat treatment device in which heating chambers are disposed with an intermediate transport chamber interposed between the heating chambers in a top view, the multi-chamber heat treatment device comprising:
a first gas cooling chamber provided adjacent to the intermediate transport chamber in the top view, wherein the first gas cooling chamber is configured to cool a treatment object using a cooling gas; and
a cooling gas circulation device comprising:
a gas circulation passage having a first end and a second end, wherein the first end is a gas inlet which passes through a top surface of the first gas cooling chamber and extends toward a first position adjacent to a top surface of the treatment object in the first gas cooling chamber, wherein the second end is a gas outlet which passes through a bottom surface of the first gas cooling chamber and extends toward a second position adjacent to a bottom surface of the treatment object, wherein the gas outlet faces the gas inlet with the treatment object interposed between the gas inlet and the gas outlet, wherein the cooling gas circulation device is configured to blow the cooling gas through the gas inlet and exhaust the cooling gas through the gas outlet, and wherein the cooling gas is circulated via the first gas cooling chamber,
a blower provided at an intermediate portion of the gas circulation passage, wherein the blower is configured to allow the cooling gas to flow through the gas circulation passage, and
a gas cooler provided on an upstream side of the blower, wherein the gas cooler is configured to cool the cooling gas exhausted from the first gas cooling chamber,
wherein the first gas cooling chamber has an annular horizontal cross sectional shape in the top view; and
a center of the gas inlet in the cooling gas circulation device is displaced in a horizontal direction with respect to a center of the first gas cooling chamber.

2. The multi-chamber heat treatment device according to claim 1 , further comprising:
a partition door configured to partition the first gas cooling chamber and the intermediate transport chamber, wherein the partition door projects into the first gas cooling chamber.

3. The multi-chamber heat treatment device according to claim 1 , further comprising:
a mist cooling chamber below the intermediate transport chamber, wherein the mist cooling chamber is configured to cool the treatment object using a mist of a predetermined cooling medium.

4. The multi-chamber heat treatment device according to claim 1 , further comprising:
an oil cooling chamber below the intermediate transport chamber, wherein the oil cooling chamber is configured to cool the treatment object using a predetermined cooling oil.

5. The multi-chamber heat treatment device according to claim 1 , wherein the first gas cooling chamber further comprises a work entrance through which the treatment object enters and exits between the first gas cooling chamber and an outside of the multi-chamber heat treatment device.

6. The multi-chamber heat treatment device according to claim 1 , wherein the gas cooler is a heat exchanger including a second gas cooling chamber and a heat transfer tube.

7. The multi-chamber heat treatment device according to claim 6 , wherein the blower comprises a fan casing, a turbo fan, and a water cooling motor,
wherein the second gas cooling chamber is a horizontally disposed container having a cylindrical shape and a central axis set in a horizontal direction, and
wherein the turbo fan comprises a rotary axis set in the horizontal direction.

8. The multi-chamber heat treatment device according to claim 1 , wherein the gas circulation passage comprises a first chamber and a second chamber, wherein the first chamber connects the blower and the first gas cooling chamber, and wherein the second chamber connects the first gas cooling chamber and the gas cooler.

9. The multi-chamber heat treatment device according to claim 1 , wherein the first gas cooling chamber is a container having a rounded cylindrical shape.

10. The multi-chamber heat treatment device according to claim 1 ,
wherein the first position is closer to the top surface of the treatment object than the top surface of the first gas cooling chamber,
wherein the second position is closer to the bottom surface of the treatment object than the bottom surface of the first gas cooling chamber, and
wherein the gas inlet extends to the first position and the gas outlet extends to the second position.

11. The multi-chamber heat treatment device according to claim 10 ,
wherein the gas inlet and the top surface of the treatment object are adjacent to each other such that the cooling gas blown through the gas inlet is not dispersed in the first gas cooling chamber before the cooling gas is blown to the treatment object, and
wherein the gas outlet and the bottom surface of the treatment object are adjacent to each other such that the cooling gas that has contributed to cooling of the treatment object is not dispersed in the first gas cooling chamber before the cooling gas is blown to the gas outlet.

Assignees

• Ihi Corp
• Ihi Machinery & Furnace Co Ltd

Inventors

• Katsumata Kazuhiko
• Isomoto Kaoru
• Nakayama Akira

Classifications

• F27D2007/045

  Fans · CPC title

• C21D9/0018

  for charging, discharging or manipulation of charge · CPC title

• C21D1/62

  Quenching devices · CPC title

• C21D1/613

  Gases; Liquefied or solidified normally gaseous material · CPC title

• C21D1/00

  General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering · CPC title