GB1486728A - Heat exchangers - Google Patents
Heat exchangersInfo
- Publication number
- GB1486728A GB1486728A GB1226775A GB1226775A GB1486728A GB 1486728 A GB1486728 A GB 1486728A GB 1226775 A GB1226775 A GB 1226775A GB 1226775 A GB1226775 A GB 1226775A GB 1486728 A GB1486728 A GB 1486728A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- blasting
- driven
- rollers
- turntable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/025—Devices and methods for diminishing corrosion, e.g. by preventing cooling beneath the dew point
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
1486728 Blasting; laminar forging; making heat exchangers KRAFTWERK UNION AG MANNESMANNROHREN-WERKE AG and SANDVIK AB 24 March 1975 [1 April 1974] 12267/75 Heading B3D B3H and B3A A process for imparting compressive stress to a zone of a wall of a heat exchange tube 15, which zone is bounded by a surface of the wall, comprises subjecting the tube to surface coldworking, such as by blasting or hammer forging. In apparatus for carrying out the process by blasting, the tube 15, which is U-shaped is placed on a feed conveyer 2, Fig. 2, having horizontal rollers 21 driven by a motor 23, and vertical rollers 22 adjustable to the spacing of the limbs of the tube. A turntable 42 is rotatable through 180 degrees by a drive 43, 44 and carries a blasting compartment 45 containing a nozzle head 41. A second conveyer 3 is disposed on the other side of the turntable. In use, the conveyers are driven so that one limb of the tube is treated in the blasting compartment until a photo-electric cell stops the motor 23 and simultaneously actuates the drive 43, 44 and the turntable is driven through 180 degrees for treatment of the curved portion of the tube. When the curved portion has been treated, the drive 43, 44 is stopped and the conveyers driven in the reverse direction so that the other limb of the tube is treated. The turntable 42 is supported for rotation on ball bearings 50, Fig. 3, and has a blasting head 41 consisting of an annular array of nozzles 41a supplied with abrasive particles, such as glass beads of 0À1 to 1À5 mm. diameter, through a line 47. Spent abrasive falls through apertures 42a into a container 46 leading to a cyclone separator 80, the useful particles and particles from a hopper 82 controlled by a valve 84 being projected along the line 47 by a nozzle 48 connected to a compressor 49. In another embodiment, two tubes 15 are connected by plugs 17, Figs. 5 and 6, to form a closed loop and placed on supports 61 which are hinged to move downwardly as a blasting device 5 guided by a wheel 57 engaging the tube moves around the loop, the device being supported by rollers 54, 55 on an outer rail 6 and the loop. In a similar embodiment, the blasting device is replaced by a hammer forging machine, Fig. 8, carried by a carriage 76 supported by rollers 77 on the outer rail 6. A frame 73 has rollers 72 supporting a head 71 which is rotated by a friction roller 74 driven by a motor 75 and has a number of forging units 78 operating on the resonance principle. Reference has been directed by the Comptroller to Specification 1,408,379.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19742415764 DE2415764A1 (en) | 1974-04-01 | 1974-04-01 | HEAT EXCHANGER |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1486728A true GB1486728A (en) | 1977-09-21 |
Family
ID=5911844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1226775A Expired GB1486728A (en) | 1974-04-01 | 1975-03-24 | Heat exchangers |
Country Status (7)
Country | Link |
---|---|
JP (1) | JPS50135401A (en) |
AT (1) | AT358681B (en) |
BE (1) | BE827307A (en) |
DE (1) | DE2415764A1 (en) |
FR (1) | FR2266137B1 (en) |
GB (1) | GB1486728A (en) |
IT (1) | IT1034558B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2316896B (en) * | 1996-09-05 | 2000-07-12 | Strix Ltd | Electric heaters |
WO2004033144A1 (en) | 2002-10-08 | 2004-04-22 | Nippon Steel Corporation | Boxing joint with excellent fatigue strength, method of manufacturing the boxing joint, and welded structure |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS528930A (en) * | 1975-07-14 | 1977-01-24 | Nippon Kokan Kk | Method of preveting oxidation of austenite stainless steel due to highhtemperature steam |
FR2444719A1 (en) * | 1978-12-18 | 1980-07-18 | Alsthom Atlantique | PROCESS FOR TREATING A WALL IN AUSTENITIC STAINLESS STEEL AND PERCUSSION APPARATUS FOR APPLYING THIS PROCESS |
FR2632557B1 (en) * | 1988-06-13 | 1994-08-05 | Framatome Sa | METHOD FOR IMPROVING THE WEAR RESISTANCE OF A STAINLESS STEEL TUBE |
JPH0280627A (en) * | 1988-09-16 | 1990-03-20 | Toyota Autom Loom Works Ltd | Fluted roller for draft apparatus of spinning machine |
-
1974
- 1974-04-01 DE DE19742415764 patent/DE2415764A1/en not_active Withdrawn
-
1975
- 1975-02-24 AT AT138375A patent/AT358681B/en not_active IP Right Cessation
- 1975-03-24 GB GB1226775A patent/GB1486728A/en not_active Expired
- 1975-03-24 IT IT2155375A patent/IT1034558B/en active
- 1975-03-26 FR FR7509542A patent/FR2266137B1/fr not_active Expired
- 1975-03-28 BE BE154873A patent/BE827307A/en unknown
- 1975-04-01 JP JP3970475A patent/JPS50135401A/ja active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2316896B (en) * | 1996-09-05 | 2000-07-12 | Strix Ltd | Electric heaters |
WO2004033144A1 (en) | 2002-10-08 | 2004-04-22 | Nippon Steel Corporation | Boxing joint with excellent fatigue strength, method of manufacturing the boxing joint, and welded structure |
EP1579945A1 (en) * | 2002-10-08 | 2005-09-28 | Nippon Steel Corporation | Boxing joint with excellent fatigue strength, method of manufacturing the boxing joint, and welded structure |
EP1579945A4 (en) * | 2002-10-08 | 2010-05-05 | Nippon Steel Corp | Boxing joint with excellent fatigue strength, method of manufacturing the boxing joint, and welded structure |
Also Published As
Publication number | Publication date |
---|---|
FR2266137A1 (en) | 1975-10-24 |
AT358681B (en) | 1980-09-25 |
IT1034558B (en) | 1979-10-10 |
ATA138375A (en) | 1980-02-15 |
FR2266137B1 (en) | 1980-01-04 |
BE827307A (en) | 1975-07-16 |
JPS50135401A (en) | 1975-10-27 |
DE2415764A1 (en) | 1975-10-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |