US1663755A

US1663755A - Door structure for pressure tanks

Info

Publication number: US1663755A
Application number: US118932A
Authority: US
Inventors: John R Gammeter
Original assignee: BF Goodrich Corp
Current assignee: Goodrich Corp
Priority date: 1926-06-28
Filing date: 1926-06-28
Publication date: 1928-03-27
Anticipated expiration: 1945-03-27

Description

2 Sheets-Sheet 1.

J. R. GAMMETER DOOR STRUCTURE FOR PRESSURE TANKS Filed June 28 1926 March 27, 1928 I I I J..R. GAMMETER noon s'muclrunm FOR PRESSURE TANKS Filed June 28,- 1926 I 2 Sheets-Sheet 2 wllllllllllllll UNITED STATES Patented Mar. 27, 1928,

JOHN B. GAMMETER, F AKRON,

OHIO, ASSIGNOR TO THE B. F. GOODRICH COMPANY, or NEW Yoax, n. r, A co BPORATION OF NEW YORK.

DOOR STRUCTURE FOR PRESSURE TANKS.

Application filed June 28, 1926. Serial No. 118,932.

This invention relates to door structures for pressure tanks such as vulcanizers, tanks for treating articles with fluid as in the case of creosoting wood, and the like. Heretofore the doors of large pressure tanks of this characte'rhave been sealed by, a lip gasket set in an annular recess .formed m the door jamb or in the door, as in my'United States Patent No. 1,226,766, the 11p gasket permitting, without breaking the seal, the slight outward movement of the door under the force of the pressure within the tank which heretofore has been-..very diflicult to avoid, because of the difliculty I of obtaining and preserving a ood fit of the parts throughout the circum erence of a large and heavydoor.

Such use of a lip asket has proved serviceable in the case of vulcanizers, where the .12 fluid contacted by the rubber gasket is steam or water, although in long usa may become over-vulcanized, at in tanks in which the contained 'material is of a gummy character, as in the case of creosote or tar, and in which the construction has been such. that the material contacted the lip gasket, the latter has had the disadvantage ofbecoming so coated and fouled with the material as to prevent its proper functioning.

My chief objects are to provide an improved structure in which a compression gasket may be employed to obtain an effective seal; to provide against such play as 85 may result from wear of the fittings; to provide for economy of construction and repair and ease of operation; and to provide such advantages in a door structure for the end of a horizontal tank, wherein the congained liquid must contact the sealing gas- Of the accompanying drawings:

Fig. 1 is an end elevation of a door-structure embodying my invention in its preferred form.

Fig.2 is a plan view of the same. Fig. 3 is a fragmentary section on line H of Fig. 1.

Fig; 4 is a section on line 4-4 of Fig. 3. Referring to the drawings, the shell of a vulcanizer or the like is shown at 10, upon the end of which is mounted a ring castm 11 constituting the door frame or seat and formed in its end face with an annular,

e the gasketrelatively deep recess for seating a compression gasket 12. The bottom wall of the I gasket recess is formed with a concentric groove 12, and the latter communicates with the interior of the vulcanizer through a plurality of apertures or

passages

12, 12, so that fluid within the vulcanizer will urge the gasket outward against the door structure of the vulcanizer when said door is closed. The gasket may be of any suita- O ble material but is preferably composed es-, sentially of lead or other soft metal when the apparatus is to be used with gummy, viscous, or sticky material such as creosote, so that it will not be disintegrated by opening and closing of the door. The door here shown comprises a domeshaped circular plate 13'and a ring casting 14; secured to the plate and constituting the annular margin of the door. The door is hinged on a vertical axis, and with a loose fit, to the door frame 11 at 15, and its marginal casting 14; is formed with a conical guide flange 16 adapted to mate, with substantial tolerance, with a female conical face 17 formed in the door frame, and the said marginal casting is also formed with an annular flange 18 adapted to fit into the gasket recess of the door frame to compres and seal against the gasket 12.

The outer margin of the mug casting 14 of the door is formed with outwardly-projecting .

locking lugs

19, 19 equally spaced about its circumference the said lugs thus alternating with and defining recesses 20 20.

For enga closed, a ocliing ring 21 is rotatably mounted upon the door-frame casting 11 andis formed at 1ts annular forward margin in the lugs 19to hold the oor with

locking lugs

22, 22 projecting radially inward at a distance in front of the doorframe casting, the said lugs being equally spaced apart circumferentially of the casting and thus alternating with and defining

recesses

23, 23. The lugs 19 of the door casting are somewhat narrower than .the recesses 23 of the door-frame casting and the lugs 22 of the latter are narrower than the recesses 20 of the door casting, sothat when the locking ring is in proper position the door may be closed, the lugs of each set assin between those of the other set, so that t e locking ring then may be turned to bring each. of the locking-ring lugs 22 over one of the door lugs 19, as shown clearly inFigs. 1 and 3, to lock the door but.

The contacting faces of the

lugs

19 and 22 may be given a smooth finish to avoid friction, and in the embodiment here shown, having other means for effecting the final movement of drawing the door against its seat, the said faces need not be oblique or of tighten the door against its seat and compress the gasket 12 as the ring is rotated with its lugs interlocked with those of the door, a' circumferential series of hardened wear-

plates

27, 27 are secured to the inner faceof the locking ring by

screw bolts

28, 28,;each of said plates being formed with an oblique, highly-finished edge-face 29 adapted to mate, in a wedging action, with a complemental-face 30 of one of a circumferential series of

similar plates

31, 31 secured to the outer. face of the door frame 11 by

screw bolts

32, 32.

.The wed ing plates of the locking ring may be ba ed by radial lugs 33, 33 (Fig. 3) extending inwardly from the locking ring and the plates 31 of the door frame may be backed by

radial lugs

34, 34 projecting outward from the latter, to avoid excessive strain upon the

screw bolts

28 and 30.

The parts are preferably given such relative dimensions as to provide substantial clearance between all radially-overlying parts of the locking-ring assembly and the doorframe structure, as shown clearly in Fig. 3, excepting the rollers 24, so that the latter will constitute the only means for positively holding the locking ring in concentric position, and the locking ring will be rotatable with little friction. v

For rotating the lockin ring a segmentalgcar or arcuate-rac-k 35 18 secured upon its margin and meshed with a pinion 36 journaled on a stub-shaft 37 projecting from a bracket 38 mounted upon the rear margin of the door frame, thehub of the pinion being formed with a hole 39 to receive a turn-bar.

In the operation of the device, which in general will be obvious-from the foregoing description, substantially all friction of tightening the door on its seat is taken by the smooth, plane faces of the locking lugs messes 19 and 22 and the highly-finished faces of the wedging-

plates

27 and 31, so that a high compression of the gasket 12 may be obtained. The gasket-compressing flange 18 of the door is not required to be rotated upon the gasket, which avoids abrasion of the gasket, and as the said flange 18' may be given a snug fit between the walls of the gasket-holding recess, the sealing-face of the gasket is well-protccted from fluid contained high compression to it while substantially closing it off from the interior of the tank, and without sliding movement of a sealing member against the gasket, results in a structure especially well-suited for treating articles with fluids of such character that they would destroy or would interfere with the functioning of a rubber larly a gasket of the lip ty e.

My invention is susceptible of modification within its scope, and I do not wholly limit my claims to the specific construction shown.

I claim:

1. A door structure for pressure tanks,

the said structure comprising a door frame, a door adapted to seat of the said parts being formed with an annular gasket-receiving recess and the other being formed with an annular gasket-compressing flange adapted to fit snugly into the recess, a compression gasket in the recess, and means engaging the door at a multiplicity of positions about its periphery and constrained to act simultaneously at such positions for drawing the door bodily toward the door frame, without relative rotation or angular movement of the door and frame, to compress the gasket, the door and the frame being formed with complemcntal, conical, guiding surfaces.

2. A door structure for pressure tanks, the said structure comprising a door frame, a door adapted to seat in the door frame and formed with peripheral locking lugs, a looking ring rotatably mounted upon the door frame and formed with looking lugs adapted by rotation of the ring to be interlocked with the lugs of the door, the door and the door frame being formed with snugly interfitting, substantially cylindrical guiding sur. faces, and a compression gasket mounted between the door frame and the door.

gasket and particuin the door frame, one

3. A door structure as defined in claim 2 in whichthe looking ring and the door ,frame are provided with coacting oblique surfaces adapted to move the ring axially 6 .to tighten the door on its seat in the rotation of thering.

4. A door structure for pressure tanks, the said structure compnsmg a circular door frame mounted .upon a horlzontal axls, a

10 door mounted for movement into and out of closed position with relation to the door frame, a locking ring for drawing the-two together, a roller bearing for the locking ring, the door and the door frame being formed with snugly interfitting, substan tially cylindrical guiding surfaces, and a compression gasket mounted between the door frame and the door.

In witness whereof I have hereunto set my hand this 25th day of June, 1926.

' JOHN R. GAMMETER;