US789620A

US789620A - Stopper for boiler-tubes.

Info

Publication number: US789620A
Application number: US22508603A
Authority: US
Inventors: Henry T Mason
Original assignee: Individual
Current assignee: Individual
Priority date: 1903-12-31
Filing date: 1903-12-31
Publication date: 1905-05-09
Anticipated expiration: 1922-05-09

Description

PATENTED MAY 9, 1905.

H. T. MASON.

STOPPER FOR BOILER TUBES.

APPLIOATION FILED 1136.31, 1903. RENEWED SEPT. 18,1904.

Inventor Attorney Nirnn Snares Patented May 9, 1905.

PATENT OFFICE.

STOPPER FOR BOILER-TUBES.

SPECIFICATION forming part of Letters Patent No. 789,620, dated May 9, 1905.

Application filed December 31, 1903. Renewed September 19, 1904. Serial No. 225,086.

To a, whom it ntrty concern:

Be itknown that I, HENRY T. Mason, acitizen of the United States, residing at South Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Stoppers for Boiler-Tubes; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in stoppers for boiler-lines and. other tubes.

The object of the invention is to provide a stopper for a ruptured or leaky boiler-tube, whereby the same may be quickly closed.

A further object is to provide a stopper having a jointed sectional connecting-rod for connecting the two members of the stopper together.

A further object is to provide a stopper of this character which with but slight modification Will be applicable to tubes other than boiler-fines for sealing or bracing the same.

With these and other objects in view the invention consists of certain novel features of construction, combination, and arrangement of part-s, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawings, Figure 1 is a longitudinal sectional view of a boiler-flue, showing the application of a stopper, the parts being shown in the position they occupy before being drawn up into place. Fig. 2 is a similar View showing the parts in clamped or operative position. Fig. 3 is a cross-sectional view on the line 3 3 of Fig. 1. Fig. 4 is a rear end view of Fig. 1, and Fig. 5 is a view similar to Fig. 2, showing the application of the stoppers to a tubular shaft.

Referring particularly to the drawings, 1 denotes a boiler-flue tube. 2 denotes the tubesheets or boiler-heads into which the ends of the tubular fines are mounted. The improved stopper consists of two members joined together by a connecting-rod 3, which is preferably though not necessarily made in two or more sections, the adjacent ends of which are pivotally connected together, this connection being made by reducing and threading the inner end of the forward section and screw ing thereon a coupling member I, having ears or lugs 5, through which is inserted a pivotpin or rivet 6. On the pin or rivet is mounted the inner end of the rear section of rod. A pin 7 is inserted through the threaded end of the forward section of rod after the coupling member 4 is screwed onto the same to prevent said coupling from being unscrewed therefrom.

Near the outer end of the forward section of the rod is formed a shoulder 8, and beyond the shoulder8 the end of the rod is threaded, the extreme end of the rod being squared, as at 9, for the reception of a wrench.

On the end of the rod and engaging the shoulder 8 is arranged a frusto-conical-shaped expanding-head 10, on which is mounted a series of radially-disposed segmental platesections 12, which are adapted to be forced by the head 10 into engagement with the inner side of the boiler-tube 1. Around the outer edge of the section 12 is formed a groove in which is arranged an open or snap ring 13, which holds said sections in place on the head 10 and also permits them to be expanded by said head. On the outer face of the segmental sections is formed a head 14.

On the rod 3 and in juxtaposition to the outer end of the boiler-tube is arranged a cap or clamping plate 15, which is of somewhat greater diameter than the tube, as shown. On the inner face of the cap-plate is formed an annular groove or channel 16, the diameter and size of which are such as to engage the beaded or upset end of the boiler-tube when the parts are drawn up. In the groove 16 is disposed an annular packing ring or washer 17, which engages the beaded end of the tube and forms a seal at this point. Between the groove 16 and the outer edge of the plate is formed an- 21, which is formed of some suitable elastic material which when the parts are drawn up will spread out and engage the inner walls of the tube and also tightly engage the sides of the connecting-rod.

Surrounding the rod 3 in the outer face of the cap-plate is formed an annular recess 22, which is practically an enlargement of the opening through which the rod passes, and in said recess is disposed a packing 23, which seals said opening around the rod. On the end of the rod and bearing on the outer face of the plate is an adjusting or tightening nut 24 and engaging said nut is a jam-nut 25.

On the outer threaded end of the rear section of the connecting-rod is mounted a compression or clamping nut 26, which consists of a chambered body portion 27, on the outer end of which is formed an annular flange 28, and in each end of the nut is formed a cen trally-disposed threaded hole 28, the inner ends of which communicate with the chamber I of the body portion 27. In the hole at the inner end of the nut is screwed the threaded end of the rear section of the rod 3, a jamnut 29 being also arranged on this end of the bolt to engage the end of the clamping-nut 26. On the outer face of the flanged end of the nut is formed an annular bead 28'.

On the threaded hole at the outer end of the nut 26 is screwed the inner end of a threaded stem or bolt 30, on the outer end of which is formed a frusto-conical-shaped expanding-head 31, on which is arranged a series of radially-disposed segmental blocks or sections 32, around the outer edge of which is formed a groove in which is disposed an open or snap ring by which said sections are held in place upon the head 31. Between each section or block 32 and the adjacent end of the head 31 is arranged a spring 33, said springs being preferably, and as here shown, coiled springs, the inner ends of which are seated in recesses 31, formed in the outer surface of the head 31, the object of the springs being to normally force the segmental blocks or sections outwardly. The outer edges of the inner sides of the segmental sections are recessed to form an annular groove 35, which when the parts are drawn up is adapted to engage the bead on this end of the boiler-tube.

On the stem or bolt 30, adjacent to the inner side of the head 31, is arranged a sleeve 36, on the inner end of which is formed an annular flange 37. On the inner face of said flange is formed an annular bead 38. Between the bead 38 and the bead 28 on the flanged end of the nut 2 is arranged a circular-disk washer 39, which is similar in construction to the washer 21 at the opposite end of the tube.

On the sleeve 36 and engaging the outer face of the flange is circular-disk washer 40, having an enlarged outer edge which when the parts are drawn up engages the inner wall of the tube and, together with the washer 39, seals this end of the tube.

In applying the stopper to a boiler-tube the length of the tube is obtained. This being done, the stopper members are adjusted on the ends of the rod-sections so that the packing-washers 21 and 1O will respectively assume a position just beyond the beaded front and rear ends of the tube. With the parts in the positions hereinbefore described the rear stopper is inserted into the front end of the tube and pushed through the same until the washer 10 reaches the position just outside the end of the tube, as previously mentioned. As soon as the sectional blocks 32 pass out of the end of the tube they are expanded by the springs A wrench is now applied to the squared end of the connecting-rod and the same is turned to the right, the threads on said rod being arranged so that the compression or clamping nut will be turned by said rod to draw the stem 30 and head 31 inwardly, causing the flanged sleeve 36 to be forced against the washer 39, thereby compressing the same between the flanged end of the coinpression-nut 26 and the flange on said sleeve, which action expands the washer against the inner walls of the tube. ,In drawing the head 31 inwardly the sectional blocks will be brought into engagement with the beaded end of the tube and also the enlarged edge of the washereO, coi'npressingsaid washer and forming additional seals for this end of the tube.

In order that the front end of the tube will be tightly sealed, the connecting-rod is now firmly held and a wrench applied to the adjusting-nut 2st, which is turned to force the cap inwardly, which will compress the washer 21 between itself and the sectional plates 12, thereby expanding the washer 21 against the inner sides of the tubes at this end and also forcing the sections 12 up on the conical expanding-head, which will expand the same in tight engagement with the inner sides of the tubes. The packing-rings on the inner face of the cap-plate will also be forced into engagement with the beaded end of the tube and the face of thetube-sheet, thereby doubly sealing this end of the tube. If desired, the outer section of the connecting-rod may be left off and the threaded inner end of the forward section be engaged directly with the inner end of the compression-nut, so that should aleal: occur near the forward end of the tube this end of the tube may be stopped upon each side of the leaf without cutting out the entire length of tube.

In Fig. 5 of the drawings is shown a slightlymodified form of stopper, which in this form is intended and shown as applied to atubular shaft to strengthen and brace the same. \Vhen the stopper is used as shown in Fig. 5, the cap-plate 15 is of a size to correspond to the diameter of the tube and is more in the nature of a clamping-plate. The washer 40 is also left off in this form of the device. In applying the stopper members to a tubular shafting or the like they may be disposed at any point in the tube, as the members may now be arranged entirely within the tube, as shown. In this form one or more sections of the connecting-rod may also be used, thereby lengthening or shortening the stopper, as desired.

A stopper constructed as herein described may be used for stopping or capping the ends of all forms of tubing. The jointed sectional connecting-rod permits the same to be folded or separated into compact form for storing purposes and also permits the forming of connecting-rods of various lengths.

From the foregoing description, taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

Having thus fully described my invention, what I claim is 1. In a boiler-tube stopper, the combination with a sectional, jointed connecting-rod,

of inner and outer expansible stopper members arranged at each end of the same, a compression or clamping nut adjustably secured to the rear end of the rod, an expansion-head having a threaded stem engaged by said nut to draw said stem inwardly, radially-disposed segmental blocks carried and expanded by said head to engage the outer end of said tube, a washer arranged on said rod adjacent to said compression-nut, a clamping element arranged between said expanding-head and said nut whereby said washer is compressed and expanded to engage the inner side wall of said tube to seal this end of the same, a shoulder formed on the forward end of said rod, an expanding head engaged by said shoulder, expansive segmental plate-sections arranged on and expanded by said head, a clamping cap-plate arranged on said rod, a washer arranged between said cap-plate and said segmental plate sections, and means whereby said cap-plate is moved to force said washer against said segmental plates to expand the washer into engagement with the inner walls of the tube to seal the forward end of the same, substantially as described.

2. In a tube-stopper of the character described, the combination with a connectingrod made up of sections, the adjacent ends of which are pivotall y connected together, means for pivotall y connecting the same, said means consisting of a threaded coupling member to engage the inner end of one section and having ears 01' lugs between which is pivoted the adjacent end of the next section of rod, expansible stopper members arranged at each end of the c0nnectingrod, and means actuated by said rod to expand said members to close and seal said tube, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

HENRY T. MASON.

WVitn esses:

Josnrn TRUCKEY, JEAN H. TABER.