Sealing device

Patent metadata

Field	Value
Publication number	US-11401575-B2
Application number	US-201816603905-A
Country	US
Kind code	B2
Filing date	Mar 29, 2018
Priority date	Apr 13, 2017
Publication date	Aug 2, 2022
Grant date	Aug 2, 2022

Abstract

A sealing device is installed in heating treatment equipment through which a steel strip passes, the device including a rotary damper which is placed above the steel strip so as to be in contact with the steel strip, and a roll which is placed below the steel strip so that the roll opposes the rotary damper to form a pair consisting of the rotary damper and the roll opposing each other, the steel strip passing through a gap, which is formed between the rotary damper and the roll opposing each other, in which two pairs each of which is the pair consisting of the rotary damper and the roll opposing each other are arranged in tandem in a moving direction of the steel strip in the heating treatment equipment, and an inert gas is fed into a space defined by the two pairs arranged in tandem.

First claim

The invention claimed is:

1. A sealing device installed in heating treatment equipment through which a steel strip passes, the device comprising:
a rotary damper placed above the steel strip to be in contact with the steel strip; and
a roll placed below the steel strip so that the roll opposes the rotary damper to form a pair consisting of the rotary damper and the roll opposing each other, the steel strip passing through a gap formed between the rotary damper and the roll opposing each other,
wherein two pairs each of which is the pair consisting of the rotary damper and the roll opposing each other are arranged in tandem in a moving direction of the steel strip in the heating treatment equipment, an inert gas is fed into a space defined by the two pairs arranged in tandem, and the rotary damper is made of a hard material that has holes arranged in a width direction of the steel strip and through which the inert gas is sprayed onto the steel strip to seal the space defined between the two pairs arranged in tandem.

2. The sealing device according to claim 1 , wherein a pressure of the inert gas in the space is 5 mmH 2 O to 100 mmH 2 O.

3. The sealing device according to claim 1 , wherein the sealing device is placed in a CVD treatment furnace in the heating treatment equipment.

4. The sealing device according to claim 1 , wherein the sealing device is placed on each of an upstream side and a downstream side in the moving direction of the steel strip in the heating treatment equipment.

5. The sealing device according to claim 2 , wherein the sealing device is placed in a CVD treatment furnace in the heating treatment equipment.

6. The sealing device according to claim 2 , wherein the sealing device is placed on each of an upstream side and a downstream side in the moving direction of the steel strip in the heating treatment equipment.

7. The sealing device according to claim 3 , wherein the sealing device is placed on each of an upstream side and a downstream side in the moving direction of the steel strip in the heating treatment equipment.

8. The sealing device according to claim 5 , wherein the sealing device is placed on each of an upstream side and a downstream side in the moving direction of the steel strip in the heating treatment equipment.

Assignees

• Jfe Steel Corp

Inventors

• Doi Takashi
• Kasai Shoji
• Tobe Teruhiko
• Koyama Takumi

Classifications

• C21D9/561 Primary

  with a controlled atmosphere or vacuum · CPC title

• C21D9/565 Primary

  Sealing arrangements · CPC title

• C23C16/545

  for coating elongated substrates · CPC title

• C23C16/46

  characterised by the method used for heating the substrate (C23C16/48, C23C16/50 take precedence) · CPC title

• C21D9/56

  Continuous furnaces for strip or wire · CPC title