GB1376451A - Finned tube heat exchange element - Google Patents

Finned tube heat exchange element

Info

Publication number
GB1376451A
GB1376451A GB5178671A GB5178671A GB1376451A GB 1376451 A GB1376451 A GB 1376451A GB 5178671 A GB5178671 A GB 5178671A GB 5178671 A GB5178671 A GB 5178671A GB 1376451 A GB1376451 A GB 1376451A
Authority
GB
United Kingdom
Prior art keywords
fins
cross
pipe
electrode
electrodes
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
Application number
GB5178671A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB5178671A priority Critical patent/GB1376451A/en
Publication of GB1376451A publication Critical patent/GB1376451A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • 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
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/002—Resistance welding; Severing by resistance heating specially adapted for particular articles or work
    • B23K11/004—Welding of a small piece to a great or broad piece
    • B23K11/0046—Welding of a small piece to a great or broad piece the extremity of a small piece being welded to a base, e.g. cooling studs or fins to tubes or plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/124—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and being formed of pins

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Arc Welding In General (AREA)

Abstract

1376451 Welding by pressure B TROJANI 8 Nov 1971 51786/71 Heading B3R [Also in Division F4] In making a heat exchange element comprising metal fins having an elongated lateral crosssection welded to a pipe so that the fins are arranged in longitudinal and circumferential rows with successive fins of each row having their respective longer axes of symmetry disposed alternately in one and the other of two positions at right angles, two electrodes disposed parallel on the same side of the tube or in diametrically opposed position, one at each side of the tube are used to weld the fins, each electrode having a cavity with an elongated or cross-like lateral cross-section. The fins are placed in the cavities so that their longer axes of symmetry are at right angles and current is passed between the tube and each electrode. The electrodes with elongated cavities are rotated through 90 degrees between welding operations but those with cross-shaped cavities are not. The studs may be oval or rectangular, 2, 2<SP>1</SP>, Fig. 1, in section with tapered ends. The cross-like electrode cavity receives firstly a first stud and then, after removal from the first stud, a second stud having its longer axis of symmetry at right angles to that of the first, without turning the electrode. In a machine for welding studs to a pipe with electrodes having cross-shaped cavities, the pipe 1, Fig. 11, is rotated stepwise by a pneumatic cylinder 7 operating a gear 12 attached to the pipe support spindle, a ratchet 13 preventing return during steps. Two opposed electrodes 3, 3<SP>1</SP> carried on pneumatic rams 6, 6<SP>1</SP> weld studs to opposite sides of the pipe.
GB5178671A 1971-11-08 1971-11-08 Finned tube heat exchange element Expired GB1376451A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5178671A GB1376451A (en) 1971-11-08 1971-11-08 Finned tube heat exchange element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5178671A GB1376451A (en) 1971-11-08 1971-11-08 Finned tube heat exchange element

Publications (1)

Publication Number Publication Date
GB1376451A true GB1376451A (en) 1974-12-04

Family

ID=10461381

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5178671A Expired GB1376451A (en) 1971-11-08 1971-11-08 Finned tube heat exchange element

Country Status (1)

Country Link
GB (1) GB1376451A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2407446A1 (en) * 1977-10-27 1979-05-25 Svenska Maskinverken Ab TUBE WITHIN WHICH ARE FIXED SURFACE INCREASE ELEMENTS, METHOD AND DEVICE FOR THE MANUFACTURE OF SUCH A TUBE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2407446A1 (en) * 1977-10-27 1979-05-25 Svenska Maskinverken Ab TUBE WITHIN WHICH ARE FIXED SURFACE INCREASE ELEMENTS, METHOD AND DEVICE FOR THE MANUFACTURE OF SUCH A TUBE

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Legal Events

Date Code Title Description
PS Patent sealed