US1835646A - Method and equipment for heat-insulating ship surfaces - Google Patents

Description

R. L. HAGUE Dec. 8, 1931.

METHOD AND EQUIPMENT." FOR HEAT INSULATING SHIP SURFACES Filed Oct.

21 1926 2 Sheets-Sheet Qvwewtoz R.L.HAGUE @513 M Qua/nus Dec. 8, 1931. R. HAGUE 1,835,646

METHOD AND EQUIPMENT FOR HEAT INSULATING SHIP SURFACES Filed Oct. 21, 1926 2 Sheets-Sheet 2 Qwuewbo c R-L. HAGUE 3311;; M Mom m1 Patented Dec. 8, 1931 UNITEb STATES "OFFICE ROBERT L. HAeUn oFinnw YORK, NY; IASSIGNOR To STANDARD on. DEVELOPMENT r coMrAnxA oonroranrron or DELAWARE ivrn'rnon-aivn Eon P nNr r03 nnnnmsunnrme SHIP s RrAcns A pplicationlfiled October J21, 1926. serial 304 13.279.

-This invention relates t improvements in the transportation of volatile liquids invessels. particularly bulk oil carrying vessels. The invention comprises asystem for water f cooling the'deck'and sidesabove the water p which line, cool water being supplied over substantially an; the exposed surfacesadjacent the storage space forthe volatile liquid. In

t v this way theevaporation losses from theliquid cargo are mini ized.

The invention will'be fully understood from the following descriptiontaken in cone nection with the accompanying drawings in Fig. 1 is a-fragmentary perspective view of the forward deck of a tanker;

Fig. 2 is an enlarged side elevation, the i iew being taken along the line 11-11 of ig. 1; r

Fig. 3 is an'enlarged side. elevation, the view being taken along the line IIIIII of Fig. 1.

In the drawings, reference letter A. denotes the forward deck of a bulk oil carrying vessel having hatches 1, 2, 3, and 4 opening into the forward storage tanks, which contain volatile liquids. In accordance with myinvention, the deck overlying these tanks is divided into compartments by longitudinal and transverse bafile plates denoted respectively by numerals 5 and 6; 6'. These bafiEle plates serve as weirs or dams to retain water discharged from nozzles 7, 7, and 8, supplied from a pipe system 9 into which sea water is pumpe The battle plates have perforations or spill holes 10 at such a height as to form step-wise pools of water. In this way a fair uniformity of depth is maintained over the deck, notwithstanding its curvature. It will be understood that the sea water is discharged more or less centrally of the deck,as shown, and flows through the perforations 10 from each compartment to the next lower compartment. Holes 11 are formed in the bulwarks 12 and through these holes the water from the outer compartments flows down the vessels sides. A' shield plate 13 (Fig.3) is fitted outboard over the holes 11 to distribute the water in the form of a sheet.

A similar result could be obtained by allowing the water to overflow the tops of the bafiie plates, but in the event of the ships rolling or pitching too great a body of water may leave the pool. This is prevented by the plate area above the spill holes 10.. Asix inch depth of water is adequate'for proper --insulation.- The influx of watershould be suflicient to maintain a fairly rapid flow through the compartments and over the ships side. The pipe system 9 is provided with valves for the'control of: the flow of water,

and this may be varied as circumstances require.

The balile'plates'are secured to the deck angle-pieces spot-welded or riveted to the plates and deck, or in anyother suitable way. The deck surfaces included within the compartments,, and the lower portion of the baflie plates, are preferably covered with a suitable water-imperviouscoating. Y A dramage opening 14 is provided 11TH, corner of each compartment. Thisiopenin-g is-plugglgd when the compartments are to be filled. lugs-are fitted -in thescuppers,'so

that all the water discharged onthe deck will flow out. through the holesll.

The storage tanks amidship and aft. when filled with a volatile liquid, will be insulated with a water layer orfilm inthe same manner,

as shown and described lforlthe forward tanks. If it is not desiredto flood all the deck compartments, the transverse. bafiife plates 6= may be imperforate. Then, by closing the proper valvesin'the pipe system 9, the water flow may be restricted to a'limited portion of the deck, for example,the

.area included between battles (Sand 6', Fig. 1.

Heretofore it has been considered-impractical to transport very highly volatile liquids in bulk oil carrying vessels because of the conduction of heat to the material through the. unprotected deck and sides exposed to the atmosphere The present invention :makes it possible to maintains.- temperature in the storage tanksnot much above, the. temperature; of the water which the .vesselis traversing.

As an. additional safeguard against loss of volatile liquids and danger; from fire, I prefer to connect pipes to the storage tanks to convey all vapors that may be generated in them to a. point of discharge high up on the mast, or to a compressor and'cooler. Gondensate formed is returned to the tanks. The handling of vapors-from-the tanks in the general manner just. referred to is described and claimed in my application for United States patent Serial No. 143,278, filed of even date herewith. i 7' 7' V 5 '1 Y 1 Various changes and alternative arrangements may be madewithin the scope of the.

appended claims, in which it is my intention to claim all novelty inherent in the invention as broadly as the prior art permits.

I cla-im: I 1.v Incembination with the deck of a: bulk oil; carrying vessel, a plurality of baffle plates sively through other compartments to a point of discharge, 7

5. The method of cooling a ships weather deck having-portions inclined to the horizontal when the ship is on an even keel, which comprises controllably diseharg'mg water upon the-higher portions: of the deck, and obstructing at a plurality of spaced intervals the water flowing toward the lower portions of the deck, to maintain a layer of water of substantial thickness throughout the extent offthe section of deck being treated.

6. The method of cooling a ships weather deck and adjoiningsides, the weather deck having portions inclined to the horizontal when the ship-is on an even keel, which com prises controllab-ly discharging Water upon the higher portions of the deck,obstructing the water flowing toward the lower portions of the deck at av pluralityof. spaced intervals to maintain a-layer of water of substantial thickness throughout; the extent of the section of deck being treated, obstructing the water at the edges of the section to maintain a continuous layer of Water at the edges, and

continuously flowing the water from. the edges down the adjoining sides of the ship in a sheet substantially continuous through out the extent of the edges. 7

. ROBERT L. HAGUE.

nally and transversely to form compartments thereon adapted to retain poolsof water, a pipe system supplied with water from outboard and discharging into the inner compartments, drainage means permitting flow from the inner compartments progressively forward to aft and through the outer compartrnents to the-'ves'selsside, said side having perforations permitting discharge of the water downthe side, anda shield platefitted 7 over the holes (outboard) todistribute the water in'the form of a sheet.

3. In combination with the deck of a bulk oil'carrying vessel, longitudinal and transversebaflie plates forming compartments on the deck, the longitudinal baflie plates having perforations spaced atsuch a height as to maintain a proper water level. in each compartment, and means for supplying water to the inner compartments, from which the water flows through the perforations in the successive compartments, the side of therves- 'sel-having perforations through which the water from the outer compartments discharges;

- 4.111 combination with the deck of a bulk oil carrying vessel; a plurality ofbafiie plates secured to the deckand arranged longitudinally andtransversely-to form compartments thereon adapted to" retain pools of water, a

"pipe system supplied withwater from out-' board and dlscharging into certain of said compartments, and drainage means permitting flow fromsaid" compartments pro gres-

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