US35691A - Improved method of securing tubes in tube-sheets - Google Patents

Improved method of securing tubes in tube-sheets Download PDF

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Publication number
US35691A
US35691A US35691DA US35691A US 35691 A US35691 A US 35691A US 35691D A US35691D A US 35691DA US 35691 A US35691 A US 35691A
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Prior art keywords
tube
ferrule
sheets
flue
improved method
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Expired - Lifetime
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/06—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49373—Tube joint and tube plate structure
    • Y10T29/49375—Tube joint and tube plate structure including conduit expansion or inflation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49938—Radially expanding part in cavity, aperture, or hollow body
    • Y10T29/4994—Radially expanding internal tube
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49945—Assembling or joining by driven force fit

Definitions

  • FIG. 1 is a longitudinal central section of a portion of a boilcniue having. one end secured in the tuhesheet, according to my invention.
  • au Fig. 2
  • Fig. 3 a longitudinal central section of a line and ferrule, the latter not being driven in the former;
  • Fig. 4 the same View as Fig-3 with the ferrule driven in the flue.
  • This invention consists in the employment or use of a ferrule having a concave outer surface of slightly taper form, and of such diameter that it may be driven into the flue and expand the end of the same in such a manner that it will close snugly around the hole made in the tube-sheet to receive the flue and form a tight and permanent connection of the flue to the tube-sheet, as hereinafter fully shown and described.
  • A represents a portion of a tube-shcet of a steam-boiler, and a is a circular hole in the sheet which receives the end of the flue B.
  • the edge of the hole a is made convex, as shown in Figs. 1, 3, and 4, and it is rather larger in diameter than the flue B, to admit of the latter being expanded with it.
  • C is a fer-rule, the exterior of which is slightly taper from its outer edge to the point a', and is grooved circumferentially, as shown at b, between said points, so as to form a concave surface.
  • the inner part, c, of the ferrule is beveled or tapered quickly from the edge of the groove b to the end of the ferrule.
  • the external diameter of the ferrule at the inner edge of the groove b, at the point a', is equal in diameter to the interior of the flue B, as shown clearly in Fig. 3.
  • the operation of securing the Ilue in the tube-sheet is as follows: The end of the tine B is inserted in the hole a in the tube-sheet and so adjusted as to extend a trille beyond it. The ferrule G is then inserted in the end of the tlue B, a mandrel, D, placed against its outer edge, as shown in red in Fig. 3, and the ferrule driven in the flue, so that the ends ot' the flue and ferrule will be ilush with each other, as shown in Fig. 4.
  • the ferrule C in being driven into the flue, slightly expands its end, and a taper mandrel, E, is then inserted in the ferrulc and driven through it, so as to expand the ferrule and also the end ofthe flue until the exterior of the latter is closed tightly all around the edge of the hole a in the tubesheet A and at both sides of it, as shown in Fig. 1.
  • This expanding of the ferrule also causes its interior to be equal in diameter to the interior of the tlue B, as shown in Fig. 1, and colisequently a iu'e of equal diameter internally is obtained throughout, and also a smooth unbroken surface with a tight and permanent connection of the flue and tube-sheet is ob tained.
  • Taper ferrules have been used with plane exterior surfaces for expanding the iues and securing them in the tube-sheets; but they have served to contract the orifices of the fines, and are therefore objectionable on that account.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Coupling Of Light Guides (AREA)

Description

UNITED STATES PATENT OFFICE.
JOHN H. KNICKERBOCKER, OF PHILADELPHIA, PENNSYLVANIA.
IMPROVED METHOD OF SECURING TUBES IN TUBE-SHEETS.
Specification forming part of Letters Patent No. 35,691, dated June 524, 1862.
panying drawings, making a part of this specification, in which- Figure 1 is a longitudinal central section of a portion of a boilcniue having. one end secured in the tuhesheet, according to my invention. au, Fig. 2, indicate the plane of section. Fig. 2 is an end View of the same; Fig. 3 a longitudinal central section of a line and ferrule, the latter not being driven in the former; Fig. 4, the same View as Fig-3 with the ferrule driven in the flue.
Similar letters of reference indicate corresponding parts in the several figures.
This invention consists in the employment or use of a ferrule having a concave outer surface of slightly taper form, and of such diameter that it may be driven into the flue and expand the end of the same in such a manner that it will close snugly around the hole made in the tube-sheet to receive the flue and form a tight and permanent connection of the flue to the tube-sheet, as hereinafter fully shown and described.
To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.
A represents a portion of a tube-shcet of a steam-boiler, and a is a circular hole in the sheet which receives the end of the flue B. The edge of the hole a is made convex, as shown in Figs. 1, 3, and 4, and it is rather larger in diameter than the flue B, to admit of the latter being expanded with it.
C is a fer-rule, the exterior of which is slightly taper from its outer edge to the point a', and is grooved circumferentially, as shown at b, between said points, so as to form a concave surface. The inner part, c, of the ferrule is beveled or tapered quickly from the edge of the groove b to the end of the ferrule. The external diameter of the ferrule at the inner edge of the groove b, at the point a', is equal in diameter to the interior of the flue B, as shown clearly in Fig. 3.
The operation of securing the Ilue in the tube-sheet is as follows: The end of the tine B is inserted in the hole a in the tube-sheet and so adjusted as to extend a trille beyond it. The ferrule G is then inserted in the end of the tlue B, a mandrel, D, placed against its outer edge, as shown in red in Fig. 3, and the ferrule driven in the flue, so that the ends ot' the flue and ferrule will be ilush with each other, as shown in Fig. 4. The ferrule C, in being driven into the flue, slightly expands its end, and a taper mandrel, E, is then inserted in the ferrulc and driven through it, so as to expand the ferrule and also the end ofthe flue until the exterior of the latter is closed tightly all around the edge of the hole a in the tubesheet A and at both sides of it, as shown in Fig. 1. This expanding of the ferrule also causes its interior to be equal in diameter to the interior of the tlue B, as shown in Fig. 1, and colisequently a iu'e of equal diameter internally is obtained throughout, and also a smooth unbroken surface with a tight and permanent connection of the flue and tube-sheet is ob tained.
Taper ferrules have been used with plane exterior surfaces for expanding the iues and securing them in the tube-sheets; but they have served to contract the orifices of the fines, and are therefore objectionable on that account.
I do not claim, therefore, broadly or irre spective of construction a ferrule for securing the ues of boilers in tubesheets; but
What I claim as new, and desire to secure by Letters Patent, is
Securing the iues B of boilers in the tubesheets A thereof by means of the'ferrules C, grooved at their exterior, tapered, and driven in the ends of the tlues, so as to cause the ends of the saine to close around both edges of the holes a in the tube-sheets and admit of the line being of equal diameter throughout, as herein set forth.
JOHN H. KNICKERBOOKER.
Witnesses:
XV. H. TAsKEE, JNO. D. BLAND.
US35691D Improved method of securing tubes in tube-sheets Expired - Lifetime US35691A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2486654A (en) * 1945-09-13 1949-11-01 Crosley Motors Inc Valve seat structure
US2735698A (en) * 1956-02-21 Header plate-tube joint for heat-
US5566440A (en) * 1992-10-15 1996-10-22 Johannes A. Schoormans Method for the fabrication of an outflow element
US20100052318A1 (en) * 2008-08-27 2010-03-04 Woodward Governor Company System and Method of Joining Fluid Transporting Tube and Header Using Internal Ferrule

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735698A (en) * 1956-02-21 Header plate-tube joint for heat-
US2486654A (en) * 1945-09-13 1949-11-01 Crosley Motors Inc Valve seat structure
US5566440A (en) * 1992-10-15 1996-10-22 Johannes A. Schoormans Method for the fabrication of an outflow element
US20100052318A1 (en) * 2008-08-27 2010-03-04 Woodward Governor Company System and Method of Joining Fluid Transporting Tube and Header Using Internal Ferrule

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