# US 10,442,039 B2 · Method for producing membrane wall, pipe bending device for manufacturing transfer duct and method for manufacturing transfer duct using same

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- Number: US 10,442,039 B2
- Document ID: US10442039B2
- Status: Granted
- Kind: B2
- Application number: 14/773,109
- Filed: 2013-12-04
- Published: 2016-06-23
- Granted: 2019-10-15
- Earliest claimed: 2013-03-07
- Assignees: Doosan Heavy Industries Construction Co., Ltd
- Applicants: Doosan Heavy Industries & Construction Co., Ltd.
- Inventors: Won Heo; Young Jin Ju; Sung Ku Park; Min Su Paek; Sung Guck Lee
- Web page: https://patentgrep.com/patent/US10442039B2

## CPC

- B23P 15/00: Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B21D 7/08: by passing between rollers or through a curved die
- B23K 9/0052: {Welding of pipe panels}
- B23K 9/167: and of a non-consumable electrode
- B23K 10/02: Plasma welding
- B23K 31/00: Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups B23K1/00 - B23K28/00
- B23K 37/0443: {Jigs}
- B23P 15/26: heat exchangers {or the like (making heat exchangers by methods covered by other subclasses B21D53/02)}
- C10J 3/74: Construction of shells or jackets
- B23K 2101/06: Tubes
- F28F 2255/00: Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
- Y02E 20/16: Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E 20/18: Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
- Y10T 29/4935: Heat exchanger or boiler making
- Y10T 29/49353: Heat pipe device making
- B23P: METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS (arrangements for copying or controlling B23Q)
- B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F)
- B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- C10J: PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES (synthesis gas from liquid or gaseous hydrocarbons C01B; underground gasification of minerals E21B43/295); CARBURETTING AIR OR OTHER GASES
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Disclosed is a method for producing a cylindrical membrane wall including a plurality of tubes having a coolant passing through an inner part thereof. The method includes producing a plurality of sub-bundles by welding a plurality of tubes to each other after longitudinally arranging the tubes to be adjacent to each other in parallel, producing a plurality of panel-type bundles by welding the sub-bundles to each other, forming a plurality of curved bundles having a curved surface of a predetermined curvature by pressing the panel-type bundles, and welding the curved bundles to each other using a jig.

## Claims

### Claim 1

A method for manufacturing a transfer duct, the method comprising:
forming a unit pipe assembly by coupling a pair of pipes to each other in a longitudinal direction through a pin;
propelling the unit pipe assembly into a space between a movable bending tool and a counter tool;
pressing the unit pipe assembly with a predetermined curvature by moving the movable bending tool to a predetermined position while bringing a surface of the unit pipe assembly into contact with inclination surfaces of the movable bending tool and the counter tool; and
forming a cylindrical duct having a curved part by coupling unit pipe assembles, which are bent in the bending of the unit pipe assembly, to each other,
wherein the pressing the unit pipe assembly with the predetermined curvature simultaneously bends the unit pipe assembly at a predetermined angle of twist according to an inclination angle of the inclination surfaces.

### Claim 2 (depends on 1)

The method of claim 1, wherein each of the movable bending tool and the counter tool has an outer circumferential surface in which a plurality of grooves are formed in correspondence to an outer contour of the unit pipe assembly.

### Claim 3 (depends on 1)

The method of claim 1, wherein the movable bending tools consist of various movable bending tools each having a bending inclination surface, and the counter tools consist of various counter tools each having a counter inclination surface, and wherein the bending inclination surfaces and the counter inclination surfaces have various inclination angles depending on the angle of the twist of the unit pipe assembly.

### Claim 4 (depends on 1)

The method of claim 1, wherein the movable bending tool is supported by a movable axis, and wherein the inclination surface of the movable bending tool includes a bending inclination surface that is inclined with respect to the movable axis, and the inclination surface of the counter tool includes a counter inclination surface that corresponds to the bending inclination surface.

### Claim 5 (depends on 1)

The method of claim 1, wherein the movable bending tool comprises at least one bending roller, which is rotatably supported by the movable axis and has an outer circumferential surface that is inclined upward or downward.

### Claim 6 (depends on 1)

The method of claim 1, wherein the counter tool comprises at least one die roller, which is rotatably supported by a fixed axis fixedly disposed at the predetermined position and has an outer circumferential surface that is inclined with respect to the fixed axis and that corresponds to an outer circumferential surface of the moveable bending tool.

### Claim 7 (depends on 1)

The method of claim 1, wherein the movable axis of the movable bending tool is movable to the predetermined position, and the unit pipe assembly is bent with the predetermined curvature and the predetermined angle of the twist by moving the movable bending tool to the predetermined position.