US1476421A - Transportable muriatic-acid tank - Google Patents

Description

Filed Feb. 4. 1922 lmqenjtoz W W J M ROWLAND TRANSPORTABLE MURIATIC ACID TANK Dec. 4, 1923.

Patented Dec. 4, 1923.

UNITED STATES PATENT OFFICE.

JASPER I. ROWLAND, OF NIAGARA FALLS, NEW YORK, ASSIGNOR TO HOOKER ELEC- TROCHEHICAL COMPANY, OF NEW YORK, If, Y., A CORPORATION OF NEW YORK.

rmsroarnnm numeric-non) TANK.

Application filed February 4, 1922. Serial 110. 534,200.

containers for the quiescent storage of muriatic acid hydrochloric acid solution) can be made by ining wooden tanks or cisterns with pure Para sheet rubber. The desirability of similar containers for transportation plurposes, as railway tank cars or the like, as long been recognized; and many efiorts have been made in the fipast to accomp plish this result, but such e orts have not attained any considerable measure of success. The object ofjthis invention is to provide a cheap and durable muriatic acid container of the transportable type.

. It has been attempted heretofore, for example to line cylindrical wooden tanks, horizontally mounted on a railway truck, with pure Para sheet: but in such cases it has been found that the lining will drop away from 80 the walls and these efforts have been abandoned. l have found that the failure is attributable, mainly at least, to the penetration from the outside of acid accidentally spilled on'the upper portion of the tank, 85 with conse uent attack upon the means or .devices use for causing the sheet to adhere to the walls. Once the acid has entered between the rubber sheet and the wall of the tank it will quickly enetrate even to remote parts, bringing a ut a general loosenin of the lining.

imong the ot er, eiforts to accomplish a similar result the following may be "mentioned: C lindrical wooden tanks, laid horizontall ve been rovided with rubbereover ends, the cy lndrical portion being lined with itch or'mastlc; steel tanks have been provi ed with hard rubber linings vulcanized in place, steel tanks have been provided with interior linings of wood with provision of an innerspace to be filled with pitch or mastic. As already stated, however, none of these constructions have proven able to withstand the conditions of use.

According to the present invention, these difiiculties are avoided and a cheap and durable transportable container is made, by constructing the tank, whether c lindrical or rectangular, of two portions w ich may for convenience be termed a body portion or container and a cover portion or closure. The body portion is lined with pure Para sheet rubber or unvulcanized rubber in general, as in the case with the stationary storage tanks mentioned above: but this sheet lining is carried over the upper edges ofthe body and for a sufiicent distance down the outside to rovide a drip to carry off any accidentally spilled acid flooding down from the cover. This lining may be bonded or cemented to the walls of the tank in various ways, for instance, b attaching a rubber sized cloth lining uni ormly in place, and then securing the Para sheet to the cloth. The cover, which should preferably be sufiiciently large to project outwardly from the tank walls on all sides, may .be secured in place in an suitable way providing a tight closure, preg erably by the use of appropriate gaskets and retaining devices as more fully described below. It is not absolutely necessary that the cover should be rubber lined, although if of material subject to corrosion by the acid it should of course be properly protected, bothinternally and externally, as by sheet rubber, or b any of the known acid-proof materia s, pitch, mastic, etc.

Certain preferred embodiments of the invention are illustrated in the accompanying drawings, wherein Fig. 1 1s a sectional view of embodying the invention;

Fig. .2 is a fragmentary sectional view showing a modification of a detail, and

Fig. 3 is a fragmentary sectional view of another modification.

While the tank 10 may I diflerent materials and may be built in (11f.

an acid tank be constructed ferent ways, the walls are preferabl built up of stralght strips 11 of sound woo which are interconnected at the corners to make the usual dovetail joint and are drawn together by bolts 12 and nuts 13.

The sheet rubber lining 14; is uniformly applied to the bottom and the walls of the tank and passes over the edge sufliciently far to form an overhang or drip 15.

The cover 16 is preferably provided with a plurality of manholes 17 normally closed by covers 18. An advantageous construction of the manholes comprises seats 19 secured to the cover by means of bolts 20. In these seats are anchored bolts 21 for tightly closing the covers 18 upon the seats.

The cover 16 preferably extends beyond the sides of the tank so that acid spilled upon it will drip clear of the tank.

While a lining for the cover 16 is not ab-v solutely necessary, I prefer to provide a lining 22 which also extends upwardly through the manholes and over the upper surfaces of the seats 19. The covers 18 are also preferably lined to produce substantially acidproof joints.

Between the cover and the tank I may provide two gaskets 23 of cured rubber which prevent the sticking of the rubber linings 14 and 22 to each other, the parting taking place between the two gaskets.

In order to avoid the expense of the cured rubber gaskets of large dimensions, two layers of fabric such as cloth or canvas may be used instead. In this case, however, a Para rubber sealing strip 24 (Fig. 2) may be applied to the cover and the tank, the bond being effected by cleaning the sheet rubber surface with gasoline or benzene and pressing them firmly together with an iron roller.

Instead of applying a sealing strip 24, which necessitates the provision of a manhole to allow a man to enter the tank and work from the inside after the cover is in place, I prefer a seal on the outside of the tank. As shown in Fig. 3 the portion 22 of the cover lining 22 may be folded down over the overhanging portion 15* of the tank lining 14 and rolled to a tight joint therewith. The portion 22 may be held loosely in place on the cover by tacking until the cover is in lace.

The cover v16 may firmly secured by means 'of bars or beams 25 drawn against the top of the cover by means of bolts 26 and nuts 27 in well known manner.

To safeguard the lining of the cover against injury an asphalt coating 28 may be applied to the top of the cover 16 as indicated irrFi 2. A sloping of the coat. in' will be a'vantageous inasmuch as it W1 1 promote quick and efiicient drainage of the acid free of the tank.

Arid spilled uponthe' cover of the tank will normally run over the ed e of the cover and drop free of the tank. 11 spite of the overhang of the cover, however, some acid will creep inwardly tending to make its way through the joint between the cover and the tank. At the joint it will come into Contact with the drip and flow down on it. From the lower end the acid will take the path of least resistance and either drop or flow down the outer surface of the tank rather than to penetrate to any material extent. the wood or to creep upwardly behind the drip toward the edge of the tank. It is of course understood that the drip may be extended downwardly far enough to preclude the creeping of the acid to the upper edge of the tank.

Similarly any, acid which should find its way through the seal between the cover and the tank must pass over the drip to the lower edge thereof before it can come into contact with a break in the lining or a line of separation.

While the invention has been clearl described, it may be repeated for the Sake of clearness, that it is apparently the acid which creeps between the lining and the walls of the tank that causes the destruction of the bond attaching the lining to the tank and the resulting failing of the lining. By the arrangement described the acid is prevented from finding its way to the bondin material.

claim:

1. An acid container for the transportation of acid of the ty in which size and character render its ining susceptible to injury under normal conditions of use, comprising an open-top tank, a sheet rubber lining extending over the upper edge of the tank and a cover holding the lining in position along the said ed e. j

2. Apparatus accor ing to claiml in which the lining extending over the edge terminates in a dependingdrip portion.

3. Apparatus according to .claim 1 in which the cover projects outwardly beyond the edge.

4. Apparatus according to claim 1 in.

which the cover is provided with a sheet rubber lining and including a seal between the cover and the tank having parts separable along a horizontal plane.

5. A container for acid subject to conditions causing agitation, comprising an opentop tank, an unvulcanized sheet rubber inner lining extending overthe upper edge of the tank andterminatingfin a depending drip portion, a cover provided with a sheet rubber lining, means for securing the cover upon the tank, and a seal between the cover and the tank including a connection betweenthe sheet rubber linings of the tank and-the cover of the tank.

t. A container for acid subject to conditions causing agitation, comprising an the cover and the tank comprising two open-top tank, an unvulcanized sheet rubgaskets of fabric and a connection between her inner lining extending over the upper the sheet rubber linings of the tank and the m edge of the tank and terminating in a decover inside the tank.

pending drip portion, a cover provided In testimony whereof, I aflix my signawith a sheet rubber lining, means for securture.

ing the cover upon the tank, a sealbetween JASPER M. ROWLAND.

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