US1181616A - Apparatus for removing boiler-scales. - Google Patents

Description

u. E. SANDBLOM.

APPARATUS FOR REMOVING BOILER SCALES. APPLICATION HLED OCT. 29. 1915 mvcanhgr Patented Ma 2, 1916.

ourrno s'rarns Pjiill hlll GFFICE.

AEPABAT'US FOR REMOVING BOILER-SCALES.

Specification of Letters Patent.

iatented May 2, 1916.

Application filed October 25, 1915 Serial Ho. 58,648.

T 0 all whomit may concern:

Be it known that LGmnon EFRAIML Saxo- BLOM, engineer, a subject of the King of Sweden residing at Gottenborg, in the Province of Gottenborg and Bohus and Kingdom of Sweden, have invented new and useful improvements in Apparatus for Removing Boilexficales, of which the fol lowing is a specification.

This invention refers to apparatus for removing of scales or the like from boiler plates, especially from the interior surfaces of the shell of cylindrical boilers.

The object of the invention is to employ a cheap, simple and reliable device, adapted to be advantageously used in narrow spaces as well as in all other compartments in the boiler. Also my said implement is convenient to use for cleansing of: the outer surfaces of boiler tubes as well as the plating of ship's hull or the like.

Another object of this invention is t provide a scale removing device which in be used even by persons not particularl skilled in the handling of such apparatus and to assist the user in a iiplying eilectivc blows on the plate to be treated.

The in ention comprises a rapi" revolv ing shaft provided with a plurality of short chains or similar flexible members such as wire ropes, arranged in straight lined or spiral rows along the shaft, saidshaft being caused to revolve by the influence of some driving motor. As the driving motor 1 prefer a small. electric machine adapted to be conveniently held by hand by the workman. To increase the etliciency of the apparatus the chains or flexible members are provided at their free end with a chipper or hammer preferably with sharp edges, 1 use the db vice in such a way that the shaft is caused to quickly revolve and thereby is held in the vicinity of the plate to be treated, parallel with same so that the free ends of the flexible members respectively their chippers or hammers are caused by the centrifugal force to strike the plate with very often repeated blows until the scales or incrustations are knocked off The device forms a readily manipulated self-contained mechanism which is, as a whole, rigid and can be inserted through a manhole or the like and held firmly adjacent to the part it is desired to clean.

In the accompanying drawing Figure l n of the shaft showing the "led out in working position. i view of the chipper or hama section through a boiler the use of the improved device -1C\I'(l in a rather narrow space. i s slew of the complete appaire in re vs along suitable length of the shaft and may cal rows.

be set in straight lines or heliliniit myself to the special em- 7 ntilius '2 r lace the ch suitable flexible members but I prefer to mrt chains comprising circular links as and th m to be best suited for the i 11 shape of the links decs the wear and tear of the link iron, as the one link will be free to slide all around the neighboring link, will not be the case if oblong: or usual chain links were used, be cause it is not possible in such shaped links for the one link to move but on a rather limited portion the neighboring link, causing th' to be very quickly Worn out.

In the free end of each chain or flexible member ihcre is suspended at chipper or work.

hammer 0, preferably of the form clearly illustrated in the Figs. 1 and 2 and provided with a rather sharp edge Z around the outermost end, in the vicinity of which the cent-er of gravity of the hammer-body is situated, far from the Suspension end for the purpose oi increasing the influence by the centrifugal force when revolving the shaft with the chains swung freely around same.

The shaft (1, projects from an electric motor 2. presided with a handle f by means of which the apparatus is readily manipulated inside the boiler 72,, In very narrow spac such instance between the boiler shell .nd a stay 5 it sometimes happens that the device cannot be introduced so far 110 as necessary, and to overcome these difiiculties the shaft (1 may be prolonged rather extensively which however would decrease the efiicacy of the apparatus on account of the flexibility of the thin shaft. Such vibrations may be avoided by surrounding the revolving shaft a on the length between the motor 6 and the working end with a tube 2' (Fig. 5) attached to the motor 6 in any suitable way. A certain amount of lateral I110- tion of the rather long shaft a may be allowed by means of a universal joint me One of the important features of my improved instrument is to be found in its adaptability to suit narrow spaces, such as illustrated in Fig. 3. In such places the flexible members I; get wound around the shaft a, thus automatically adjusting their length so as not to injure the plates by too hard blows but to soften same just as needed. The mode of attaching the chains 6 on to the shaft a by means of the split pins d insures a handy replacing of worn chains by fresh ones and consequently the cleaning work can be continued without undue delay.

Having thus described my said invention and how the same is to be performed what 1 claim as new and desire to protect by Letters Patent is:

An apparatus for removing incrustations comprising a rigid rotatable shaft, a motor directly mounted on the end of said shaft so as to form an integral portable member therewith, a plurality of independentchain members connected at their inner ends to said shaft and formed of circular links, and a conical shaped chipping member attached to the outer end of each chain member having a sharp circular cutting edge at its outer

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