US1649397A - Tank-manhole arrangement - Google Patents

Description

' v Nov. l5, 1927.

C. H. FOLMSBEE TANK MANHOLE ARRANGEMENT Patented Nov. 15, 1927.

UNITED STATES GLYDE n. EoLMsEEE, or BAYNNE, NEW JERSEY, AssIGNoE y'ro AMERICAN CAR. AND

PATENT OFFICE.

FOUNDRY COMPANY, OF NEW YORKyN. Y., A CORPORATION F NEW JERSEY- TANK-MNHOL-E ARRANGEMENT.

Applicationy f ll'ed September 9, 1926. Serial No. 134,470.

In the drawings: Fig. 1 shows a vertical seotion'through a dome. and manhole of an insulatedv tank car7 illustrating the application of my invention tothe manhole, andt also' to a safety valve;

' Fig. 2 is a fragmentary plan view of the parts shownv in Fig. 1, a portion of the tank cover and its securing:V means being broken awayv to expose parts beneath; mi Fig. 3 is a. fragmentary View 4on a larger scale than Figs. 1 and 2, showingr a'verti'calf radiall section through a portion' ofthe manhole ringJ and: associated parts; f

Fig; 4c is 'affragmentary planviewpf one of the parts'shovvn infFigs. 1- and? 2'.

This inventionx relates tomanhole-con?-` structions and the likeffor insulated containers, such as manholes and safety Vvalves *inthe domes-l of insulated .railway car tanks. The object is to provide a simple, convenient, rugged7 andinexpensive'construction. I also aim to minimize the necessity for special, parts, b v employing parts that are equally applicable and satisfactory for uninsulated tanks. Y

Inthe construction of a manholeiu the dome'- of' atank can. there is generally em-f ployed a anged ringrsecuredto they tank shell around the manholel opening:- therein. to which ring-,the manhole cover is suitably secured.. Such a ring is-iknownv as adome ring-7 or manhole ring.` I f 1in.l the case of ordina-ryuninsula-ted tank cars.y a: singleA plain` unsorewthreaded maindomering is used., with. lues for the manhole cov-e1'- fastenings (eye-bolts) cast 4integral with it.

In. the case of insulatedtank cars.. a' double dome ring is employed.. consisting ofan externally screwv threadediiauged inner main ring fastened to thetank shell.,andy an internally screwv threaded flangedouter. ring applied. after. the insulation'andits protective cover or sheathingrhave been installed.I and scnewed down. tight on` the sheathing so. as tomake a. watertight ioint. ThisI outer ring, carries meansof. attachment. for. themanhole coverafastenings (eyeeboltshin the form of apertured lugs cast integral. with said.r outer ringe Owing to the outer ring being a separate part, the apertures in the eye bolt lugsfhave been further away fromi the center of the manhole in the case of the insulated tank. thany in the case of the uninsulated one. Hence different covers have been required for the two types. .e

The embodiment of this invention here' shown and described'obviates these disad vantages of'present practice7 makingit feasible to` use one and the samemafin ring and vone and the vsame cover for both types `of tanks, and doing' away altogether with` theouter'ring.-in anything approaching its present formi, at any rate. It also avoids aillnecessity for the screwthreadinq ot thermes heretofore A*required inthe case of insulated tanks. l Y

The drawings show a portion of a railwaycar tank shell 5- equipped withv the usual` dome 6, which is provided with a manhole opening at 7. The tank shellv 5 and the `dome 6 have a. thermo-insulative covering 8. of any suitable fibre or other material. with a covering or sheathingr .9' (usually of sheet T netalr)- vover theinsulation.- A-tthe manhole'there is al flanged dome ring or manhole ring 10.- secured to the sheet metaldome wall. 6 b v am7 suit-able means (such` asy rivets 11).. and projecting up through corresponding openin njs iu the insulation 8 and thef (sheet metal.) covering or sheathing 9. AY manhole cover 12fof any suitableor preferred construction may be emploved it is showny seated. on the upper edge ofthe ring 1.0V and secured by evebolts1.'pivoted on pins 14 extending through pairsrof lugs 1.5; 15Tv whichv mav .be cast integral with the ring. 10: The cover 12 has al' depending. Hanse fthatlies inside they ring 10. It mavalsovbe provided with internal insulation 17. held 'in'. place within th-elangeilbv alining. plate 18 securedto the flange 16 at its edges: A safetvgvalve'19 is'sh own (conventionally). mounted over an opening in2 the dome wall 6 and extending up through corresponding openings in the Y insulation 8' and in the=sheathingl 9.

Because of4 irregularities in the tank5 and in the dome 6 as; commercially constructed,

as well as in theinsulation 8 and its shcathf ing 9, it is diiiicult or practically impossible to secure a reasonably good tit ot the sheathk ing 9 around the manhole ring l0, or around the safety valve 19.

In the construction here illustrated, this is taken care of (for the manhole 7) by providing a relatively lange opening in the sheathing 9 around themanhole ring` lO. with a separate jacket or sheathing ring 20 to close the excessive opening. Such a separate sheathing ring 20 can easily be cut and fitted to the annular cover opening` around the manhole ring 10. notwithstanding any irregularities in either the location or' the outline of this opening. The inner and outer edges ofthe sheathing ring 20 may be tightly sealed or jointed around the manhole ring l0 and with th-e inner edge oi the sheathing 9. y Y

As shown in Figs. l, 2, and 8, 'the manhole ring l0 has an external groove 22 machined in an. annular enlargement or thickening 23 on its exterior. to take the inner edge of the sheathing ring Q0. which is fitted and jointed or sealed therein. 'if necessary. Preferably, this groove 22 isvot V shape. or flaring. with its lower 'side sloping outward and downward, and isnarrow enough to Wedge tight on the inner edge ot the sheathing ring 9.0 Without Vallowinr the latter to ubottom in the groove. The ioint between the outer ede'e of the sheathing rineV 2O and the surrounding edge of the sheathing 9 comprises an upward onen trough or groove 25, on one of the sheathing parts (as here shown. on the sheathing ring 2m and a corresponding down-turned iiansfe 26 on the other part (as here shown. on the main portion of the shpathinfr 9 around the manhole oneningl. with a llinsr ot sealing material Q7 in said trough. 'As shown in Finis. 9 and 4. the sheathing ring 9,0 may he initially formed in a plurality of segments (nreterahly two or more. but notv morerthan tourl titted and secured together around the manhole ring l0 fitter the latter has been secured in place on the tank shell dome 6. and the insulation 8 and sheathing 9 applied. 'These seu'- ments may be united hy rivetiiw or/and welding. as shown in Fig. 4. A close. accurate fit ot the flanges 946 in the trough or groove 25 is not reouired. because the hot-poured molten sealing medium 27 (such as rooting cementl `insuresa permanently sealed water-tight ioint.

As shown in Figs. l andy 2. the safety valve 19 is similarly mounted on its openingin the sheathing 9. That is to say. the annular safety valve casing (or ringl has an annular groove 30 in Which is tted (and jointed or sealed. if necessarvl the inner edge or flange of a sheathing ring 3l. The outer edge ot this sheathing ring 3l overlaps the sheathing 9, and may be sealed or bination With the tank shell and its insulation and jacket or sheathing, and an opening therein, of an yexternally grooved dome ring at said opening, and a jacket ring with its inner edge in the ring groove and its outer edge sealed With the edge of said sheathing. Y

2. An insulated tank construction of the character described comprising the combination With the tank shell and its insulation and jacket or sheathing, andan opening therein, of a dome ring around said opening, and a. jacket ring around said dome ring sealed therewith, and alsoextending under and sealed with the'sheathing. Y

3. An insulated tank construction ofk the With the edge of the sheathing around said opening. Y f

4. An insulated tank construction of the character described comprising the combination with the tank shell and its insulation and jacket or sheathing, and an opening therein. of a domering around said opening, and a jacketrinxr around and interlocked With said dome ring: said sheathing and sheathing ring having the one an annular sealing trough and the other aj downturned iiange` sealed in said trough. e

5. An insulated tankf construction ofthe character described comprising the combination with the tank shell and its insulation and jacket or sheathing, with an open,- ing therein and a downturned ange' on the sheathing around said opening. of an externallv grooyed ringr for said opening, and jacket ringI having its inner edge in the ring groove anda trough at its outer edge with said downturned sheathing Harige sealed therein. A A

6. In an insulated tank construction having a.Y dome provided With an opening, a 'dome ring around said opening, a sheathing for said dome .having its upper edge circumferentiallv spaced from said dome ring. and a jacket ring interposed between the dome rin;T and said sheathing and interlocked therewith.

7. In an insulated tank construction haverentiaily spaced from said dome ring, and

a jacket ring interposed between the dome ring and said sheathing and sealed therewith.

8. In an insulated tank construction having a dome and a dome ring, means for ef- 1.0 fectng a. close and accurate connection of sheathing with said dome comprising a segmental Jacket ring sealed to said dome ring and sheathing. e

In witness whereof'I have hereunto setV 15 myhand.

` GLYDE H. lronisrsnn.

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