US4577385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for repairing a wall of coke oven
Assignee: Mitsubishi Chemical Corp
•
Filing: 1983-05-20
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Granted: 1986-03-25
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Expires: 2003-05-20
Abstract
Abstract A method and apparatus for observing and/or repairing damages on a wall of a coke oven or combustion chamber is disclosed. The damages on the wall are detected by positioning a heat resisting lance which includes an optical system for observing an image on the wall and conduit having a nozzle for spraying repairing materials onto damaged areas on the wall in the inside of the coke oven and moving the lance horizontally and vertically within the coke oven along its wall while observing the image on the wall at an outside of the coke oven through the optical system. When the damages are detected, the damages are repaired by spraying the repairing material onto the damaged area on the wall from the nozzle.
Inventors
- 👤 Yoshihiro Omae
- 👤 Kunio Ishikawa
- 👤 Takahisa Fukao
- 👤 Katsushige Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:39
CPC Classifications
C; C10; C10B; C10B29/00; C10B29/06; C10B45/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49718; Y10T29/49746
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
169 words
A method of repairing damages on a wall of an enclosed chamber in which a fuel is burned to provide heat, which comprises the steps of: inserting a lance into the inside of the enclosed chamber from a front of the enclosed chamber, said lance being provided with at least an optical system having means for introducing light into said chamber, as well as means for reflecting, focussing and transmitting an image on the wall so as to permit observation at a position outside of the enclosed chamber, and a nozzle for spraying materials adapted for use in repairing the damages on the wall; detecting the damages on the wall by moving the lance and means for introducing light horizontally and vertically within the enclosed chamber along the wall so as to direct light at damaged areas while observing the image on the wall through the optical system at the outside of the enclosed chamber; and spraying repairing materials onto damaged area detected on the wall from the nozzle.
Claim 2
Independent Claim
169 words
A method of repairing damages on a wall of an enclosed chamber in which a fuel is burned to provide heat, which comprises the steps of: inserting a lance into the inside of the enclosed chamber from a front of the enclosed chamber, said lance being provided with at least an optical system having means for introducing light into said chamber, as well as means for reflecting, focussing and transmitting an image on the wall so as to permit observation at a position outside of the enclosed chamber, and a nozzle for spraying materials adapted for use in repairing the damages on the wall; detecting the damages on the wall by moving the lance and means for introducing light horizontally and vertically within the enclosed chamber along the wall so as to direct light at damaged areas while observing the image on the wall through the optical system at the outside of the enclosed chamber; and spraying repairing materials onto damaged area detected on the wall from the nozzle.
Claim 3
Dependent Claim
39 words
A method of repairing damages on a wall of an enclosed chamber as defined in claim 1 wherein the damaged area on the wall is subjected to abrasion prior to the spray of the repairing materials from the nozzle.
Claim 4
Dependent Claim
30 words
A method of repairing damages on a wall of an enclosed chamber as defined in claim 2 wherein the abrasion is conducted by blasting fine particulate materials from the nozzle.
Claim 5
Dependent Claim
46 words
A method of repairing damages on a wall of an enclosed chamber as defined in claim 3 wherein the fine particulate material is selected from the group consisting of corundum, emery, garnet, quartz sand, spinel, alumina, zirconia, silicon carbide, boron carbide, boron nitride, grit and shot.
Claim 6
Dependent Claim
29 words
A method of repairing damages on a wall of an enclosed chamber as defined in claim 3 wherein the fine particulate material is 0.1 to 5 mm in diameter.
Claim 7
Dependent Claim
34 words
A method of repairing damages on a wall of an enclosed chamber as defined in claim 3 wherein the fine particulate material is sprayed under the pressure of 2 to 20 kg/cm 2 .G.
Claim 8
Dependent Claim
26 words
A method of repairing damages on a wall of an enclosed chamber as defined in claim 1 wherein the repairing material is sprayed together with water.
Claim 9
Dependent Claim
26 words
A method of repairing damages on a wall of an enclosed chamber as defined in claim 1 wherein the repairing material is sprayed together with air.
Claim 10
Dependent Claim
30 words
A method of repairing damages on a wall of an enclosed chamber as defined in claim 1 wherein the repairing material is sprayed together with carrier gas under molten state.
Claim 11
Dependent Claim
38 words
A method of repairing damages on a wall of an enclosed chamber as defined in claim 1 wherein said step of detecting the damages on the wall is effected by blowing a gas including oxygen onto the wall.
Claim 12
Dependent Claim
12 words
The method of claim 10 wherein said gas including oxygen comprises air.
Claim 13
Independent Claim
224 words
A method of repairing damages on a wall of an enclosed chamber in which a fuel is burned to provide heat, which comprises the steps of: inserting a lance into the inside of the enclosed chamber from a front of the enclosed chamber, said lance being provided with at least an optical system having means for introducing light into said chamber, as well as means for reflecting, focussing and transmitting an image on the wall so as to permit observation at a position outside of the enclosed chamber and a nozzle for spraying materials adapted for use in repairing the damages on the wall; detecting the damages on the wall by moving the lance and means for introducing light horizontally and vertically within the enclosed chamber along a predetermined area of the wall so as to direct light on damaged areas while observing the image on the wall through the optical system at the outside of the enclosed chamber; recording the location of the damaged portion of the wall, the shape and the size of the damaged portion of the wall in a recording device; moving the lance so as to automatically trace the damaged area detected on the wall based on information stored in the magnetic recording device; and spraying repairing materials onto the damaged areas detected on the wall from the nozzle.
Claim 14
Independent Claim
224 words
A method of repairing damages on a wall of an enclosed chamber in which a fuel is burned to provide heat, which comprises the steps of: inserting a lance into the inside of the enclosed chamber from a front of the enclosed chamber, said lance being provided with at least an optical system having means for introducing light into said chamber, as well as means for reflecting, focussing and transmitting an image on the wall so as to permit observation at a position outside of the enclosed chamber and a nozzle for spraying materials adapted for use in repairing the damages on the wall; detecting the damages on the wall by moving the lance and means for introducing light horizontally and vertically within the enclosed chamber along a predetermined area of the wall so as to direct light on damaged areas while observing the image on the wall through the optical system at the outside of the enclosed chamber; recording the location of the damaged portion of the wall, the shape and the size of the damaged portion of the wall in a recording device; moving the lance so as to automatically trace the damaged area detected on the wall based on information stored in the magnetic recording device; and spraying repairing materials onto the damaged areas detected on the wall from the nozzle.
Claim 15
Dependent Claim
38 words
A method of repairing damages on a wall of an enclosed chamber as defined in claim 8 wherein said step of detecting the damages on the wall is effected by blowing a gas including oxygen onto the wall.
Claim 16
Dependent Claim
12 words
The method of claim 13 wherein said gas including oxygen comprises air.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-24 | 1989-09-23 | 1990-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-24 | 1993-09-23 | 1994-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-24 | 1997-09-23 | 1998-03-25 | $7700.00 | Window Closed / Lapsed |