US1151177A - Fire-tube-boiler blower. - Google Patents

Description

E. C. HAFER.

7 FIRE T UBE BOILER BLOWER.

APPLICATION FILED OCT. 19. 1914.

Patented Aug. 24,1915.

2 %HEETS-SHEET 1.

xW/ N E. C. HAFER.

FIRE TUBE BOILER BLOWER.

APPLICATION FILED OCT-19 1914. 1,151,177. Patented Aug. 24, 1915.

2 SHEETS-SHEET 2.

COLUMBIA PLANO RAPH IO-,WASHINGTON. D c.

IEUJVVAIt-D G. HAFER, 0F GI-IAMBERSBURG, PENNSYLVANIA.

FIRE-TUBE-BOILER BLOWER.

Specification of Letters Patent.

PatentedAu 24, 1915.

Application filed October 19, 1914. Serial No. 867,366.

ToaZZ whom it may concern:

Be it known that I, EDWARD C. HAFER, a citizen of the United States, residing at Chambersburg, in the county of Franklin and State of Pennsylvania, have invented certain new and useful Improvements in Fire-Tube-Boiler Blowers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in clean-out mechanism, and more particularly to such as is adapted especially for-use in connection with fire tube boilers.

An object in view is the delivery of a maximum blast throughout a given set of fire tubes in amanner especially adapted to remove deposits therefrom.

Another object is the effective delivery of such a blast by means adapted also to de liver a uniform blast to all the fire tubes of a boiler simultaneously.

With theseand further objects in view, as will in part hereinafter become apparent and in part be stated, the invention comprises certain novel constructions, combinations and arrangements of parts as will be hereinafter fully described and claimed.

In the accompanying drawings,-Figure 1 is a vertical, longitudinal section through a fire tube boiler furnace showing the boiler in elevation, the parts being broken away for disclosing interior structure, and the structure including an illustrative embodiment of the present invention. Fig. 2 is a front elevation thereof, parts being broken away. Fig. 3 is an enlarged detail face view of the controlling valve. Fig. 4 is a vertical, central section taken therethrough. Figs. 5, 6 and 7 are detail views .of one of the discharge nozzles. Fig. 8 is an enlarged, detail, fragmentary view of part of the controlling valve mechanism.

Referring to the drawing by numerals, 1 indicates an ordinary boiler having the usual fire tubes 2, the boiler being inclosed in a furnace housing 3 of usual construction.

The usual steam dome 4 is provided on boiler 1 with which is connected pipe 5, which extends to and communicates with a valve casing 6, preferably fixed on the front of the furnace housing. The tube 5 communicates with the interior of the housing 6, preferably at approximately the highest point thereof, and a drain pipe 7 communicates with the said housing at approximately the lowest point thereof for draining water of condensation therefrom, the pipe 7 preferably extending to and discharging in the ash pit. A valve 8 controls the admission of live steam into the housing 6, and a valve 9 controls drainage through pipe 7.

A series of ports 10 lead laterally from the interior of housing 6 and are extended within the walls of the housing to a position for dlsc-harging longitudinally or horizontally,

and each port 10 communicates with a pipe 11. Preferably for the usual boiler there are a greater number of ports 10 than the pipes 11, and the extra ports are plugged to prevent leakage, or, when preferred, the valve housing 6 may merely be cast for having the unused ports drilled therein, but not actually having them drilled until they are needed, so that when for any reason an additional pipe 11 is required an additional port 10 will be drilled, or if already prepared and plugged the plug is removed and the new pipe 11 applied. This is the reason for illustrating in the accompanying drawing a valve casing 6 having a considerably larger number of ports 10 than the number of pipes 11. Care is exercised that the ports 10 shall be spaced equally distant from each other so as to be capable of uniform control.

Within the valve housing or casing 6 is seated a hollow, cylindrical valve 12, one

end of the cylinder forming the valve being open and communicating directly with those portions of the interior of housing 6 with which pipe 5 communicates, while the other end of the cylinder is closed with an integral or appropriately fixed disk, which disk is mounted on and fixed to an operating shaft 13, which shaft extends through the head 14 of valve casing 6 and through a packing gland 15 therein, to an exteriorpoint where the shaft 13 is engaged by an operating wheel or other handle 16. The cylindrical portion of valve 1.2 is formed with radial ports 17, 17 corresponding in number and spacing to those of the ports 10, so that when any port 17 is in registration with any port 10, all the other ports 17 are 'in registration with their respective corresponding ports 10. In addition to the ports 17, the cylindrical portion of valve 12 is formed with a similar port 18 arranged preferably approximately midway between two of the ports 17, so that when the port 18 is inregister with one of the ports 10, no one of the ports 17 will be in register with any of the ports 10.

As a matter of convenience of indicating to the operator the fact that the ports 17 are in register with ports 10, the wheel 16 is preferably stamped with some insignia cooperating with a properly relatively disposed corresponding insignia on valve casing 6, as indicated in Fig. 8, wherein the handle 16 is provided with a star 16 designed to cooperate with a star 16, the stars 16' and 16 being so disposed that they will be immediately opposite each other, as indicated in Fig. 8, when the ports 10 and 17 register. There is preferably a star 16 on casing 6 for each port 10, and there is only one star 16 which may be disposed in line with any one of ports 17, so that the operator can, by bringing star 16 to any one of the stars 16", be assured that he has brought all of the ports 17 into register with all of the ports 10. On the other hand, the handle 16 is provided with an arrow or other appropriate insignia 18 which, when brought opposite any particular star 16", will indicate that all of the ports 10 are closed except the particular one where the star 16 appears opposite the arrow 18. Thus the operator by bringing arrow 18 successively into register with stars 16" will successively deliver blasts to the several. pipes 11 independently of each other. Of course, in moving the pointer or arrow 18 from one star to the next, the star 16 will unavoidably pass a star 16 with a resulting passing registration between ports 10 and 17, but the time of such transient communication is so brief as to be negligible, and the handle 16 may thus be rotated and effectively deliver successive blasts to the successive pipes 12 under the full head of pressure from pipe 15 not weakened by distribution of the pressure throughout a number of pipes 11 simultaneously. When communication between pipe 5. and the several pipes 11 is to be cut off, valve 12 is moved for positioning the several ports 17 out of register with ports 10, and port 18 opposite a blank where a port 10 has not been formed. Valve 8 may also be used to cut ofl supply through pipe 5.

A branch pipe 5 extends from pipe 5 to one of longitudinally arranged pipes 20 extending along the sides of boiler 1, and having apertures along their upper portions for delivering blasts upwardly about the boiler for blowing ofi ashes, soot and other deposits from the top portion of the boiler. Pipes 20 are connected by arched pipes 20 apertured to deliver jets rearwardly along the top of the boiler for carrying loosened matter back to the flue. A valve 5 controls the supply of steam to pipes 20.

. A vertically disposed tubular header 21 is arranged approximately centrally of the end of boiler 1, and the said header is divided by partitions 22 into a number of tubular sections, there being one section for a given set of fire tubes, and it is obvious that the number of fire tubes in a set may be of any predetermined number, one desirable arrangement consisting of having two rows of fire tubes to comprise a set, and in such instance each tubular section of header 21 being in communication with a pair of horizontal cross pipes 23, one for each horizontal row of fire tubes, and each cross pipe is provided with a discharge nozzle 24 for each fire tube. The lower set of fire tubes being usually smaller in number than the others and, there usually being ofiset tubes or miscellaneous tubes, such miscellaneous tubes are preferably taken care of with the lowermost set, and in such even pendent pipes 28 similarly nozzled are provided, one for each extra tube.

Each nozzle 20 consists of a tubular nip ple, a cylindrical hollow body closed at the free end of the nipple, the closure being formed with inclined discharge bores or apertures 26 extending generally longitudinally but lying at an incline to the longitudinal planes of the nipple so that the streams of steam projecting through said bores are given, by reason of the incline of the bores, a tendency to spread and to remain apart so as to form a tube of steam packed against the surrounding walls of the fire tube whereby the greatest amount of impact is effected against deposits in the tube.

The closure of each nozzle 24: is formed the actual existence of a steam tube, the H central portions of the area of each fire tube is filled with steam ejected through an axial bore 25 through the closure of the respective nozzle.

In the practising of the invention, I have found that it is desirable to deliver a blast through all of the tubes at intervals, say two or three times daily, and this will keep the fire tubes free from being choked, but

occasionally deposits will form which cannot be removed by the general blast because of its relative weakness incident to the large number of jets existing, whereas such deposits may be quickly removed by a blast limited to a few tubes including the tube or tubes containing the extra deposit. Furthermore, it is desirable at intervals, say

once a week, to thoroughly clean the fire tubes by successfully delivering blasts to the successive sets. In doing this, however, I find that the blowing of deposits from one set of tubes will allow the loosened foreign substances or at least some of them to settle back into other of the fire tubes so that when the several successive blasts have been delivered to the several sets of tubes, only the last set blown will be perfectly clean. A delivery of a general blast through all of the pipes 11 to all of the tubes will remove all of the loosened articles and leave all of the fire tubes perfectly clean.

What I claim is 1. In a fire tube blower, the combination, with a fire tube boiler, of means for independently delivering a blast of steam to different fire tubes and a valve for controlling the delivery of steam thereto having means for effecting such independent delivery and means for effecting simultaneous delivery to all of the fire tubes.

2. In a fire tube blower, the combination, with fire flues, of pipes for independently delivering a steam blast to said flues, a valve casing with which all said pipes communicate, and a valve within the casing having ports spaced to register simultaneously with all of said pipes, said valve also having a port adapted to register independently with any one of said pipes while the first mentioned ports are out of registration there with.

3. In a fire tube blower, a valve casing, a series of distributing pipes connected therewith, a valve within the casing, means for supplying steam to the valve, and means for actuating the valve, the valve being formed with a series of ports spaced to register simultaneously with all of said pipes, and being also formed with an additional port disposed not to register with any of the pipes while the first-mentioned ports are in register therewith and adapted to be brought successively and independently into registration with the several pipes when the firstmentioned ports are not in registration therewith.

4:. In a fire tube blower, a valve casing, a series of distributing pipes .connected therewith, a valve within the casing, means for supplying steam to the valve, the valve being formed with a series of ports spaced to register simultaneously with all of said pipes, and being also formed with an additional port disposed not to register with any of the pipes while the first-mentioned ports are in register therewith and adapted to be brought successively and independently into registration with the several pipes when the first-mentioned ports are not in registration therewith, and means disposed exteriorly of the valve casing for indicating relative registrations of ports.

5. In a fire tube blower, a valve casing adapted to be fixed to a boiler furnace, means for supplying steam to the casing, a series of distributing pipes extending to the casing, a port leading laterally from the interior of the casing for each of the pipes, a cylindrical valve seated in the casing and extending across all of said ports, and having a series of radially disposed ports spaced to register simultaneously with all of the ports of the casing, the valve having a similarly formed port spaced to be out of register with any of the casing ports when the first-mentioned valve ports are in register therewith and to register independently and successively with the casing ports when the first-mentioned valve ports are out of register therewith, and means for revolving the valve.

6. In a fire tube blower, the combination, with fire flues, of jets for delivering a blast to some of said tubes, other jets independent of the first for delivering blasts to other tubes, means for supplying fluid under pres sure to all of said jets, and means for controlling the supply of such fluid for delivering the same independently to the independent jets and also for delivering such fiuid simultaneously thereto.

7. In a fire tube blower, the combination, with fire fiues, of jets for delivering a blast to some of said tubes, other jets independent of the first for delivering blasts to other tubes, means for supplying fluid under pressure to all of said jets, and a valve for controlling the supply of such fluid for delivering the same independently to the independent jets and also for delivering such fluid simultaneously thereto.

In testimony whereof I aflix my signature in presence of two witnesses.

EDWARD C. HAFER.

Witnesses:

R. M. PARKER, EDGAR M. KITGHIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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