US574422A

US574422A - Boiler-flue clean

Info

Publication number: US574422A
Authority: US
Priority date: 1896-04-28
Filing date: 1896-04-28
Publication date: 1897-01-05
Anticipated expiration: 1914-01-05

Description

(No Model.)

H. L. HILDRETH.

BOILBR FLUE CLEANER. No. 574,422. Patented JaLILJ 1897.

@hilight l'iElt'RY L. HILDETH, OF4 SGINAW., llliCHIGAlfl.

connatre c CLEANER.

srncnca'rron forming part of Letters raient No. transe, dated January@ 13er.4

' imitation met April 2s, 189e'. scalino. 589,36 7. ou model.)

` .T @ZZ whom, it may concern: W

Be it known that 1, HENRY L.v HILDRETH, of the city and county of Saginaw and State of Michigan, have'invented an Improvement y. in Boiler-Tube Cleaners, of which the following is a specification.

My invention has, reference to boiler-tube cleaners; and it consists of lcertain improve-- ments fully set forthinthe following specifixo cation and shown in the accompanying drawings, which form a part thereof.

The object of my. invention is to provide a` boiler-tube cleaner` which shall cause the scale to be cut orscorecl ofi from the tube and blown out. In carrying out my invention I provide a hollow head containing a screw or propeller piyoted therein and'v adapted to be rotated T UyJaf'jetotweaiuor'ainsupplled, preferably, z'o through a tubular handle. lThe said propel- 1er or screw rotates a shaft carrying jointed one or more arms provided with suitable cutters adapted to be thrown out by centrifugal force, so as to'scrape the inner Walls of the tube'. In operation the jet of steam causes the screw-or propeller to rotate rapidly, and

this causes the. cutters to be thrown against the inner surface ofthe tubes, so as to cut or scrape them. The loosened scale is then blown 3o through and4 out of the tube by the steam or air. To insure perfect dislodgment of the Scale, the head .may be further provided with steel scraping-blades, which,"if the head be turned, are caused to scrape the interior walls ofthetube. Theirfunction,however,islnore particularly to-center the head Within the tube, so that the rotating cutters inay be perl mitted to act more .uniformly upon the scale. My invention will be better understood by 40 reference to the drawings, in which" Figure l is a side clcvation'of my improved scraper, showing it applied to a boiler, the tubes of which are in section. Fig. 2 is a longitudinal sectional elevation of my improvedtube scraper or cleaner, and Fig. 3 is an end view ofsame. y A is the head, and is open upon one end and closed upon the other, and to the latter or closed end is attached the tubular rod or han- 5o die B,. into the end of which ste-ain may be blown hy a ilexible pipe l or in any other suitable-manner. The head A is provided .der the action of the steam-jets.

with the springs upon its 'outer surface, which guide the head centrally within the tube K and make 'it adjustable to tubes of to direct the steam in jets against suitable'-.

propellers or screws within the head.

D are propellers or screwswithin the head A, and have their-shaftE journaled in suit-A able bearings kiF, so as to freely revolve un Upon the end of the shaft E is a transverse arm G, to the ends of which are pivoted loose arms Il, connected by aspring J. The arms II have journals', upon-which' are loosely supported saw` or disk shaped cutters I, preferably formed with teeth, as shown'. In practice I prefer to use these cutters in pairs to' insure a greater cutting action. or propellers D are not rotating, the cutters T are drawn inward by the spring J, so as not to touch the walls of the tube.

The operation will now he understood. The head is inserted within the tube, and as the steam, water, or air isr forced through the screw or propeller D is put into rapid rotation. with great rapidity, and under the centrifugal' action thereby produced the arms il' in ove outward against the action of the spring .I to

vWhen Vthe screws This action causes 'the shaft E to rotate bring theeutters or Scrapers l into contact Y with the interior walls of theftube, so that the said cutters press against the interior walls ofthe tube while rotating,.`and at the saine time by manipulation of the tubular handle B they are moved Ylongitudinallyl through the tube.' VIt will be understood,

therefore, that their action upon the scaleor '4 'coating of the tube' will be in the line of the screw having an exceedingly fine-pitch, and thus permit the most thorough abradlngnaction upon the coating of the inner surface of the tube. By siinply'rotating the handle B and the head A all the scale or matter which is loosened but not absolutely detached may KGO be readily scraped from the interior of the tube, and under the action of the steam-jet wilibe forcedventirely through the tube, so

4that Whenthe scraper is removed the tube is lar .cutters or Scrapers vupon the ends of said perfectly cleaned. y 2 movable arms, springs arranged about the 65 I do not confine myseli'to. the mere details outersurface of the tubular part for guiding `of construction, as it is evident that they may it centrally7 in the tube and acting as Scrapers, 1: 5 be modified in various ways without departand means to supply blast to said head for ing from the essential features of. my invenlthepurpose of rotating the screw or propeller tion, .which comprehend a steam :actuated while the 'head is being moved throughthe 7o rotary "cutter controlled by a long handle tube to be cleaned. adapted to be moved through the tube to be 5. Inaboiler-tube scraper,the combination ro cleaned. of a tubular head provided upon the outside Having flow described my invention, what with centralizing-springs, a vapor-pipe lead- Iclaim as new, and desire to secure by Letters i ing into the tubular head and terminating in 75 Patent, is`- jets or nozzles, a rotaryshaft journaled in the 1.' Inaboilertube scraper, the combination head and provided with a propeller or screw I5 yof a cylindricalortubularhead having one end adapted to be rotated by thefjcts of vapor, a

closed and the other end open, longitudinal cross-head-fon the end of the shaft, and spring- Stlnngs secured at their. middle parts to the controlled' expansible cutters carried by and 8o Glitter surface of thecylindrcal head and hav with the cross-head whereby the action of ingliheir free ends extending respectively forcentrifugal force moves the cutters outward 2o ward and backward and bent outward to form while being rotated with the shaft and screw. elastic supports substantiall'y7 as shown, a G. Ina boiler-tube scrapenthe combination vaponsupply pipe leading intthe'closed end of a longitudinally-movable head orguiding- 85 of the headand terminating in jets ornozzles, support, a tubular handle for moving the y a rotary shaft carried by thehead, a propeller said head or support through the tube and ritter screw secured to the shaft and adapted to holding it against rotation, a rotary shaft pivbe rotated by the jets of vapor, and an exoted within the head or support and adapted pansible cutter operated bythe rotary proto rotate under the action of a vapor supplied 9o peller-shaft to scrape the interior surface of through the tubular handle, a, rotary movable the tube.` spring-controlled pivoted arm carried upon 3o 2. Inaboiler-tubescraper, the combination the forward end of the rotary shaft, and a of a tubular head, a screw or propeller arpivoted cutter carried by the free endof the ranged eloseto said head, a shaft journaled in rotary arm, the parts operating in such man? 9 5 said head adaptedto be rotated by the screw ner that the head or support contro-ls the lonor propeller, expansible rotary cutters carried gitudinal movement of the rotary cutter and 3 5 by and rotating relatively 'of the said shaft, a the rotating shaft, secures the rotary moves] rr lg to retract the cutters when at rest and ment thereof. V

y means to supply 'steam or air to said head for 7. The combination of the head A, a tubnxoo the purpose of rotating the screw or propeller lar handle B for moving the same and the while the head is being moved through the nozzles or apertures'lll'. within the head, with 4o tube to be cleaned. a rotary shaft E `havin g onc or more screws In a boiler-tube scraper, the combination or propellers D within the head and adapted of aA tubular head, a screw or propeller arto be acted upon by the steam from' the noz 105 ranged close to said head, a shaft journaled zles or apertures, an expansible eutterearried in said head adapted to be rotated by the upon the end of the shaft D and movable 45 screw or propeller, expansible cutters carried outwardly by centrifugal force, and spring by and rotating with the said shaft consisting to hold the cutter against the action of cenof a transverse arm secured to the shaft, mov- A trifugal force. y, 1 [o 4 able arms held against centrifugal force by 8. The combination of the head A, a tubusprings pivoted to said transverse arm, circu lar handle B for moving the same and the 5'0 larentters or Scrapers upon the ends `of said i nozzles or apertures M within the head, with. movable arms, and vmeans to supply a blast i a rotary shaft E having one or more screws to said head for the purpose of rotating the or propellers D within the head and adapted 115 screw or propeller while the head is being to be acted upon bythev steam frorthe nozmoved through the tube to be cleaned. i zles or apertures, and an expansible cutter 55 4. In aboiler-tube scraper,the combination carried upon the end of the shaft D consistof a tubular head, a Vscrew or propeller aring of a transverse arm i-..piveted springranged close to said head, a shaft journaled actuated armslI, and rotary cutters I. 12ol screw or propelle1,eXp-nsible cutters carried hereunto set my hand. 6o by and rotating with the shaft consisting of HENRY L. IIILDRETII.

in said head adaptedto be rotated -by the In testimony of which invention I have a transverse arm secured to the shaft, movl Witnesses:` able arms held against centrifugal force by EZRA J. DEMoREs'r, springpivoted to said transverse arm, eircu- II. K. HOWRY.