US1057980A - Boiler-tube blower. - Google Patents

Description

P1. B. PRICE. BOILER TUBE BLOWER.

PPLIOATIQN FILED 00T. 24, 1912.

Patented Apr. 1, 1913.

2 SHEETS-B11111112 1.

R. B. PRICE.

BOILER TUBE BLOWER.

- APPLICATION FILED 00T. 24, 1912. 1,057,238@ Patented Apr. 1,1913

2 SHEETS-SHEET Z.

WM M ROBERT lIB. PRICE, OF .STONEHAM, MASSACHUSETTS.

BOILER-TUBE BLOWER.

Specification of Letters Patent.

Patented Apr. 1, 191s.

Application led October 24, 1912, Serial No. 727,486.

To all 'whom t may concern.'

Be it known that I, ROBERT B. PRICE, a citizen of the United States, residing at Stoneham, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in Boiler-Tube Blowers, of which the following is a specification. p

This invention relates to improvements in boiler ,tube blowers and 'is particularly adapted for use in connection with the horizontal return tube type of boiler.

The object of the invention is to provide a blower adapted to. blow soon-scales or ashes from the tubes of a boiler by directing a jet of superheated steam into m'of each ofshid tubes, said devicelbeing arranged. asfa fixture on saidfboiler1 and connected in such a manner to the door of said boiler that it may be automaticallyy moved out of the `way by the opening of said door, whereby access may be had to the front tube sheet, without device.

A further object of. the invention is to provide a blower comprising nozzles directed toward or into the ends of the tubes of a boiler ,and by which one of the rows or series or a plurality of series of said tubes may be blown, or the entire series may be lsimultaneously blown as desired.

Still another object of the invent-ion is to provide means accessible from the exterior of the door of saidboiler adapted to control lthe nozzles of each of the series thereof.

The invention consists in the combination and arrangement of parts whereby the above objects and certain other objects hereinafter appearing are attained as set forth in the..

fol-lowing specification and pointed out in the claims.

Referring to the drawings: Figure 1 is a front view of a boiler with the device embodying my invention shown in connection particularly therewith, portions of said boiler being' broken away to save space in the drawings.

Fig; 2 is a plan section taken on line 2, 2 ofi-Fig. 1, Fig. 3 is a sectional elevation taken on line 53, 3 of Fig. 1. Fig. 4 is a detail sectional View of one of the valves'wllichdisconnecting said blowing front tube sheet. and 7 the tubes secured in said tube sheet.- The front wall 8 of the boiler 5 is placed at a substantial distance from the front tube sheet 6 forming a chamber 9 through which the products of .com-

single door might be employed without departing from the spirit of the invention. The door 11 is hinged at 13 upon one side of the opening 10, while the door 12 is hinged at 14- upon the 'opposite side of said opening, said door 12 being. provided with a lip 15 which overlaps the edge of the door 1l and seals the front of said boiler when said'doors are closed. i

Within the chamber 9 at -the front of the tube sheet 6 are arranged a plurality of nozzles 16 one for each of the tubes 7, said nozzles alining with said tubes, or in other words, directed toward or into the open ends thereof.

Different boiler makers have adopted various methods of arranging the fire tubes'in boilers, some of which are arranged in zig-l zag or staggered form,` others being arranged in vertical rows, some in horizontal rows, and still others in both horizontal or vertical rows as isthe ease in the boiler shown in the drawings and to facilitate the blowing of a boiler, the nozzles alining with the tubes of one row either vertical o`r horizontal, preferably the latter, are connected to. one feeder 17, while all of said feeders are in turn connected to a header 13.

The feeders. 17 are arranged within the chamber 9adjacent to the inside of the face of the doors 11 and 12 and are each connected through nipples 19 extending through holes 20 in the door 1l to the header 18 which is arranged exteriorly of said door 11, said nipples constituting supports for the feeders 17 and nozzles'l. A supply pipe 21.connected to said header 18 extends along Ithe front of said boiler to the pivots 13 of the door 11 and at which point in said supply pipe-a pivotal connection 22 is provided, the axis thereof alining with the axes of ibo pivots 13, whereby said door 11 may be swung upon its pivot without disturbing the connections for said tube blowing device.

Many types oli nozzles may be employed in a device of this character, but l preferably employ tubes much smaller in diameter than the feeders 17 and which are secured at one of their ends to said feeders, While their opposite ends terniinatent a slight distancetrom the ends of the tubes "i, the differences in diameter of said tubes resulting in a jet of steam of small volume, but oli' increased velocity the eil'ect ot which on the interior of the tubes 7 is to quickly remove all scales, dust or soot therefrom and to polish the interior surface thereof, performing this operation in a very short time. Furthermore by inclosing the nozzles 16 within the chamber 9, said nozzles may be operated While the boiler is in operation and the passage through said nozzles being very small and of quite a substantial length, the steam passing therethrough will be exposed to the heat passing through the chamber in which said nozzles are located, consequently the jet of steam discharged from said nozzles will be superheatcd and this being dry no injury will result from the Contact thereof with the tubes of the boiler, not` will the'fire be checked thereby to any extent.

By the arrangement. of the nozzles 16, there being one for each oit the tubes of the boiler and all of said nozzles being connected through their feeders 17, header 18 and supply pipe 21, all of said tubes may he blown simultaneously although such a method is not always practical owing to the amount of steam discharged into said boiler which is apt to. clog the saine and retard the discharge of the soot and soa es. The preferred method therefore is 'to blow one row or series ot' tubes at a time and this being accomplished while there a tire in the boiler, the escaping gases generated thereby will assist in the carrying ott' ot the `soot or scales from the tubesf beingq blown. To facilitate the blowing of the various series of tubes, alvcs 21:3 are provided at. the juncture ot each ot' the nipples Il) with the'header 18 as shown in Fig. 4l and by the manipulation ot said valves Q3 the series of nozzles controlled thereby may be shut oli' from the header 18 without 'in any way affecting* the low of steam throughl said header to the other feeders and their respective nozzles, said valves being'- arranged cxteriorly'ot the door 11 whereby' the saule may he operated at will even though a lire may be going in the boiler As herciubclorejstated the feeders 17 arc parallelly arranged adjacent to, the inner faces ot the doors 11 and 12, while the header 'iti' is arranged exteriorly o and adjacent to said door 11, said header'lB and feeders 17 being connected by the nipples 19 which pass through the holes 520 in said door and to positivelyr secure said feedersI and'lsaid header in their respective ppel- ,prising a. steam supply pipe, `nccted with said supply'pipe, rected toward'cachot said hre nomgeee tions relatively to said door, collars 24 are placed preferably upon the upper and lower nipples between the valves 23 and the outer tace of upon the door 11 performs this function at an intermediate'point, and Washers 25 are inserted betweenthe Ts 26 and the inner face of said door, the Ts 26 being firmly secured on the nipples 19 against the Washers Q5; ln this Way it will be seen that the blowing device becomes a lfixture of the boiler with the ends of the nozzles 16 al ways in osition when the doors 11 and 12 are close so that at any time the same may he operated to blow out one series or the entire series ot the tubes as desired, the only operation necessary to accomplish this being to manipulate the valve or valves controlling the particular series of nozzles through which it is desired to discharge steam.

lNhen it is necessary to get at the front tube sheet or the ends of the tubes to inspecter repair the same the door 12 is first swung upon its pivot 14 until clear of the ends of the feeders 17 after which the door 11 will be swung upon its ivOts 13 until the nozzles 16 carried therelij1 are entirely removed from the chamber 9.

Having; thus described my invention, whatwl claim and desire by Letters Patent to secure is:

1. The combination with a lire tube boiler having a door formed in two parts yand pivoled upon opposite sides ,of said boiler, of a nozzle directed into the end of each of the tubes of said boiler, feeders for said nozzles arranged ,inside of. said doors, a header ar ranged upon the outside of said doors, nipples extending through one of said door parts`- connecting said feeders with said header and constituting supports for said nozzles, a valve interposedbetween the end ot each of said nipples and said header, and :i tlcxible supply pipe connected with said header adapted to maintain said nozzles in operative connection therewith during the swinging' of the door upon vwhich said nozzles are mounted, upon its pivot. i

The combination with a boiler havino a plurality ot' parallel series of tubes, d a door pivoted at one end of said tubes, of a tube blower secured on said door and movable therewith, comprising a plurality of series ot nozzles, one of said nozzles being V'directed into the end of' cach of said tubes.

'and valves arranged upon the outside oft said' door adapted to control'said` series of iiozzles respectively` v The combination with4 a boiler having;r a plurality ot'rlirn tubes, ot a tube blower 1on1- a f iozzle dinozzles being secured in said treden'y and of the door 11, While la boss 27 formed.

feeders coutubes, said relatively smaller diameter than said feeders and valves for controlling the How of steam from said s igpply pipe into said feeders respectively.

4. The combination Witha. boiler having a plurality of fire tubes, of a tube blower comprising a steam supply pipe located outside of said boiler, feeders connected with said supply pipe and located upon the interior of said boiler, a nozzle directed toward each of said fire tubes, said nozzles being secured in said feeders and of relatively smaller diameter than said feeders and valves operable from the exterior of said boiler for controlling the How of steam from said supply pipe into said feeders respectively.

In testimony whereof I have hereunto set my hand in presence of two subscribing Wit.- messes.

ROBERT B. PRICE.

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