US1372491A

US1372491A - Superheater for locomotive, marine, and other boilers

Info

Publication number: US1372491A
Application number: US368628A
Authority: US
Inventors: Dorman Richard Brooke
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-03-25
Filing date: 1920-03-25
Publication date: 1921-03-22
Anticipated expiration: 1938-03-22

Description

n. B. DORMAN,

SUPERHEATER FOR Locomonve, MARINE, AND OTHER BOILERS.

APPLICATION FILED MAR.25, 1920'.

1,372,491 Patented Mar. 22, 1921.

2 SHEETS-SHEET l.

R. B. DORMAN. SUPERHEATER FOR LOCOMOTIVE, MARINE, AND OTHER BOILERS.

APPLICATION FILED MAR. 25, 1920- 1,372,491 Patented Mar. 22, 1921.

2 SHEETS-SHEET 2.

r Fig 2. 13 5, N {m5 5, W r /A Hill RICHARD BROOKE DORMAN, O1 MIDDLESBOROUGH, ENGLAND.

SUPERHEA'IER FOR LOCOMOTIVE, MARINE. AND OTHER BOILERS.

Specification of Letters Patent.

'latented Mar. 22, 1921.

Application filed March 25, 192C. Serial No. 368,628.

To all whom it may concern:

Be it known that I, RICHARD Bnoonn DonMAN, a subject of His Majesty the Kmg of England, and resident of Middlesbor ough, in the county of York, Kingdom of England, have invented certain new and useful Improvements in or Relating to Superheaters for Locomotive, Marine and other Boilers,.of which the following is a specification.

This invention relates to superheaters for or slacken them for the purpose oftaking out the superheater tubes from the boiler flue tubes.

Agcording to the present invention the improved means comprises a flange or connecting piece provided with a recess, slot, groove or channel extending from one side of the flange or connecting piece hereinafter referred to as flange, to the other side in a directionparallel to the face of the header to which the superheater tubes are to be secured. The direction of the recess, slot, groove or channel in the flange when in position is always at right angles to the direction of the shanks of the connecting or securing bolts. The arrangement is such that the nuts or other means used fortightening up the superheater tube joints bear on the face of the header box opposite to the face to which the superheatertubes are attached. It is obvious that in this position the nuts or other tightening means are most accessible. The recess, slot, groove or channel in the flange may be of any suitable shape and is in all cases undercut to receive the head of the securingbolt. The above description refers to the connection of a single superheater element or unit to its header but any number of such elements or units may be employed all connected to the header orheaders by arecessed, slotted, grooved or channeled flange as hereinbefore described. The securing bolts are preferably T-bolts the heads of which lie in the respective undercut recesses, slots, grooves or channels in the flanges.

The adjacent ends of the bolt heads are arranged to buttone against the other so as to keep the bolt heads always in position to receive the flanges when placing the superheater elements or units in position in the flue tubes, joint or packing rings being used to obtain a steam tight joint.

The header may be of any suitable design and is preferably provided with a proectmg I'll) or fin to act as a stop when placing the top row of superheater elements or units in position in the boiler. The said r1b or fin extends across theheader and also acts to prevent the recesses, slots, grooves or channels in the flanges being choked by the small ashes coming through the flue tubes.

Two types of flanges may be employed, which may be described as the fixed type and the loose type, the fixed type of flange having two or more holes to receive the corresponding tube ends. The outer end of each hole is preferably formed as a clearing hole, the tube end being expanded to fit tightly against the inner part of the hole. In. the loose type of flange the holes therein to receive the tube ends are clearing holes. the tube ends being expanded to fit lightly into holes in washers or collars interposed between the flanges and the packing or joint rings against the adjacent face of the header.

The bolt heads may be of any suitable form in cross section such as cylindrical, oval or elliptical or rectangular and are provided with means to prevent rotation of the bolts in the recess,slot, groove or channel in the flange, when tightening or slackening the nuts thereon.

I will describe with reference to the ac companying drawing a construction in accordance with the present invention as applied to a locomotive boiler from which its general application will be readily understood, but I do not limit myself to the precise construction described and illustrated. 1

Figure 1 is a vertical section of a header showing the connection of a plurality of superheater elements or units in accordance with the present invention.

Fig. 2 is a section on the line A, B, Fig. 1.

Fig. 3 shows a cross section of a modified form of connection also in accordance with the present invention.

Fig. 4 is a plan of the flange shown in Fig. 3.

Figs. 5, 6, 7, 8 and 9 are detail views hereinafter described.

Referring to Figs. 1 and 2 of the drawings, 1 is the smoke box tube plate of a locomotive boiler, 2 the main steam pipe from the regulator valve in the dome, and 3 is one of the flue tubes in which a superheater element 4 is disposed. 5 is the header-box "which may be of any suitable design. A

rib or fin 6 may be provided to 'act as a stop when placing the top row of elements in position in the boiler. The rib or fin 6 which extends across the header box 5 also prevents the slots 7 in the flanges S "from becoming choked by small ashes com- I ing through the fluetubes. The flanges for securing the superheater tube ends are indicated at 8, each flange being provided with an undercut 'slot'or channel 10. The slot or channel 10 is engaged by a bolt head 11, the joint being tightened up by securing bolts 12' and nuts 13. The bolt heads 11 are providedwith faces 14 which butt one against the other so as to keep the bolt heads always in 'position'to receive the flanges 8 when placing the superheater elements 4 in the flue tubes 3( Joint or packing rings 15 are used to make a steam tight joint.

Fig. 2 shows the improved attachment with aflange 8 into which the superheater tube ends are expanded as at 16.

In Fig. 3 a loose flange type of connection is shown, the tube ends passing loosely through the holes 17 in the flange 8 and being expanded into collars 18. i

The bolt heads 11 may be of difierent de sign and may be provided with projections 20 to prevent rotation of the bolts in the flange slot 10 when tightening or slacking back the nuts.

In Figs. 1, 2 and 9 the bolt heads 11 are shown as. of cylindrical cross section and elliptical longitudinal section or the ends of the bolts may be rounded off as shown, the boltsbeing circular in cross section with or without flattened sides as shown at 21. In Figs. 4, 5 and 6 the bolt heads are shown as being of approximately elliptical cross section and circular in plan, the bolt near the junction with the head being of oval section as at 22 with or without flattened side parts"23, 24.

The improved attachment hereinbefore described'may be used with any design of header and in view of the accessibility of the securing nuts is most suitable for the attachment of marine lire tube superheater elements to the header boxes.

The devicemay also be applied to almost any form of tube joints with advantage.

l Vhat I claim as my invention is 1. In a device of the class described. the combination of a header. a tubular superheater element and means securing the ends of the elements to the heade comprising a flange or connecting piece, provided with an undercut slot,'and a bolt. the head of: which lies in the slot, the longitudinal dimension of the slot in the flange when in position being always at right angles to the axis of the shank of the connecting bolt.

2. In a device of the class described. the combination of a header provided with 1: opening extending through it, a tubular superheater element, and means securing the ends of the element to the header comprising a flange or connecting piece provided with an undercut slot, the longitudinal dimension of the slot in the flange when in position being always at right angles to the axis of the shank of the connecting bolt, a bolt, the head of which lies in the slot and which extends through the opening in the header and a nut engaging the end of the bolt.

3. In a device of the class described, the combination of a header provided with an opening extending between two of its faces. a tubular superheater element. and means securing the ends of the element to one of the said faces of the header comprising a flange or connecting piece provided with an undercut slot, a bolt the head of which lies in the slot and which extends through the opening of the header, the longitudinal dimension of the slot in said flange when in position being always at right angles to the axis of the shank of the connecting bolt. and a nut engaging the end of the bolt, and exerting pressure against the adjacent face and drawing the flange toward the opposite face of the headei', the engaging faces of the head and undercut slot permitting a. slight relative rocking movement.

4. In a device of the class described, the combination of a. plurality of alined flanges each provided with an undercut slot in one face. the slots all being in alinement. two openings extending through each flange on opposite sides of the slot, :1 superheater element end entering each opening from the side opposite the slot. a header adjacent to the slotted sides of the flanges with an opening through it opposite the slots. bolts extending through said last named opening, the head of one bolt lying in each slot, the longitudinal dimension of the slots in the flanges when in position being always at right angles to the axis of the shanks of the connecting bolts. and a nut on the opposite end of each bolt exerting pressure against the header, thereby drawing the flange toward the header.

5. In a device of the class described, the combination of a plurality of alined flanges eachprovided with an undercut slot in one Face, the slots all being in alinernent, two openings extending through each flange on opposite sides of the slot, a superheater element end associated with each opening, entering it from the side oppositethe slot, a header adjacent to the slotted sides of the flanges with an opening through. it opposite the flanges, a plurality of alined bolts extending through said last named opening, each slot having in it the head of one bolt, adjacent heads abutting against each other, the longitudinal dimension of the slots in the flanges when in position being always posite end of each bolt exerting pressure against the header, whereby when the nuts are drawn up the flanges are drawn toward the header and when the nuts are loosened up the flanges may be slipped off or on the heads, the bolt heads retaining each other in alinement.

In testimony whereof I have hereunto signed my name.

RICHARD BROOKE DORMAN.