US1571039A

US1571039A - Soot blower

Info

Publication number: US1571039A
Application number: US684361A
Authority: US
Inventors: Bayer Leo John
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-01-04
Filing date: 1924-01-04
Publication date: 1926-01-26
Anticipated expiration: 1943-01-26

Description

Jan. 6 1926.

L. J. BAYER SOOT BLOWER Filed Jan. 4. 1924 2. Sheets-Shoot 1 W r R- m n M 0 6 M T n w .9

SN Q @n Hiiorvqcg L. J. BAYER 500T BLOWER Jan. 26 1926;

Filed Jan. 4, 1924 2 Sheets-Shoo; 2

Patented Jan. 26, 1926.

UNrrEn s'rara 1,571,039 PATENT GFFHTZE- LEO JOHN BAYER, OF ST. LOUIS, MISSOURI.

SEO! BLOVJER.

Application filed January 4, 1924. Serial No. 684,361.

1 '0 all whom it may concern:

Be it known that I, LEO JOHN'BAYER, a citizen of the United States, residing at St. Louis, State of Missouri, have invented certain new and useful Improvements in Soot Blowers, of which the following is a specification. 1

My invention has relation to improvements in soot blowers for boilers and consists in the novel features of construction more fully set forth in the specification and pointed out in the claims.

The present invention is an improvement over that shown in the co-pending application on soot blowers by Frank A. Bayer and myself on Oct. 29, 1923, Serial No. 671,471, and is a novel departure therefrom in that the steam supply valve is automatically released so that it may close if the operator releases the operating chain. Inthe present invention it is also the object to provide independent means for opening the supply valve and rotating the blower unit, so that the valve may be completely opened before the blower unit is moved. In the present soot blowers of this type, called valve-inhead blowers. as soon as the valve is operated the blower unit begins to rotate, or has already begun, with the result that for a part of the units rotation the valve is only partially opened. As an alternative evil to having the valve only partially open for a part of the blowing arc of the blower unit, the valve may be arranged to open before this are is reached and stay open until after the blowing arc is passed with the resulting waste of steam or injury to the boiler.

In the present invention the valve is fully opened before the blower unit begins to revolve and at the same time the valve is free to close at any time should the operator for some reason release the operating chain. Thus the valve is entirely independent in its operation from the blower unit. The obvious advantage of having the valve close automatically should the operators attention be called'a'way while blowing the boiler, is that the steam is immediately cut ofi, thus preventing waste and injury to theboiler.

The 'manner 'of accomplishing this object as well as other advantages of the invention will fully appear from the following detailed description of the invention in connection with "accompanying drawings, in which igure 1 isa sideelevation of my an proved'blower shown applied to a boiler,

parts being in section; Fig. 2 is an enlarged top plan of the blower head; Fig. 3 is an enlarged vertical cross-section of the blower head taken on the line 33 of Fig. 1; Fig. et is a further enlarged section of the valve operating mechanism in the position it assumes for opening the valve; F 5 is an end elevation of the mechanism shown in Fig. 4; Fig. 6 is a cross-sectional detail taken on the line 66 of Fig. 4:.

Referring to the drawings, W represents the boiler wall and T the boiler tubes which it is desired to clean. The complete blower comprises a blower unit or element consist-- ing of a blower pipe 1 surrounded by the usual jacket or air pipe 2, a head 3, and a steam supply pipe 4: connected to a valve casing 5 forming a part of the head. The blower pipe 1 has a plurality of jet nozzles 1 distributed along its length. In mounting the blower on the boiler, the boiler wall is first provided with an opening 0 and a wall sleeve 6 is fitted tightly into this opening, said sleeve having a flange 6 on the outer end into the corners of which is bolted a supporting bracket 7 for the blower head 3. The blower unit is passed through the sleeve 6 and is supported from the boiler tubes by suitable hangers 8. Since this invention is directed exclusively to the blower head 3 the balance of the specification will be restricted to a description of this head.

The head 3 comprises a valve casing 5, and a steamchamber 9 communicating therewith, and the valve and blower unit actuating mechanism to be described hereinafter.

The steam chamber 9 is provided with an enlarged cylindrical portion 10 for receiving the intake end of the blower pipe 1, a stuffing box 11 being provided to make the connection steam tight and at the same time permitting the blower pipe to rotate in the cylindrical enlargement 10.

The construction of the valve 12 is the same as that shown in the application above referred to and will not be, described herein in detail 1101' claimed.

The ,valve op erating mechanism comprises cooperating cam members 13 and 14: respectively, the former being slidingly mounted on a shaft 15 and feathered tosaid shaft by a feather 16, the shaft in turn being mounted at one end in a bearing 17 1nojecting from the cylindrical portion 19 of the steam chamber 9, and the latter cam member being provided with a hub 18 through "which passes the opposite end of said shaft 15, said hub being mounted in a bearing 19. formed at the end of a bracket arm projecting from the housing 9 of steam chamber 9 The bracket arm 20 has an extension 21' extending beneath the cam members the end o-t' which is provided with a fork 22 in which a bell-crank lever 23 is mounted, the upwardly extending arm or which bears against the inner face of cam member 13 and the horizontally extending arm being engaged by the operating stein 210i valwe 12. The cylindrical part 13 of cam member 13 is n'ovided with teeth 25 which together with a spring-presserjl pin 26 which normal ly rests in a space between two adjacent teeth, form a sort of escapement mechanism. The pin 26 is mounted in a lug 27 which projects from the housing of chamber 9.

A worm 28 is keyed to shaft, Lijand, meshes with a gear, wheel- 29- securedon. the blpwer pipe 1, and an operating wheel 30 is keyed lo the outer end of shaft 15 A driving chain 31 passes over the operating wheel 30. The cam member 1.4 is hollow and. has a lug 32 formed on its end. wall 141 said lug being angularly spaced from a pin. 33 on the shaft 15 when the blower head is at rest (Fig. 3). However, when the operator rotates the wheel 30 the cam member 141 will be rotated in the direction of the arrow (Fig. 6) and the lug 32 will approach the pin 33 on the shaft 15-. At the same time the cam member 13 will be pressed inwardly by cam '14 rocking the bell-crank 23 and. depressing valve stem 2 1 to open the valve 12 and admit steam to the steam chamber 9 and blower pipe 1. By the time the valve is fully open the cam 13 isin the position shown in Fig. -1- and the pin 26 has been forced out of engagement with the teeth 25 onto the smooth surface or of the cam thus permitting the cam. to rotate with shaft 15 which is now about to be driven by the lug 32 which has moved into engagement with pin 33. Since the

cam members

13 and 14; now rotate with the shaft 15 as a unit the valve 12 will remain open, and the worm 28 will drive gear wheel 29 to rotate the blower pipe 1 through its blowing arc. The blowing arc is defined by

blocks

34, 35 set in slots 36 formed on the periphery of a collar. 37 secured on the. blower pipe 1, said blocks impinging on stop member 38 formed on the link 39 connecting the head 3 with the bracket 7.

Should the chain 31 break or the operator take his hands from it during the blowing operation it is desirable that the valve 12,

close automatically to prevent waste of steam. This is accomplished by the spring 40 on shaft 15 between cam member 13 and pinion 28. When the cam member is moved inwardly to open the valve 12 the spring is compressed, and if tension is taken oil the cam member at this time the'sprin'g will force said cam back to its position of rest (l ig. and permit the valve 12 to close.

Having described myinvention, I claim:

1. In a soot blower for boilers, a rotatable blower unit, a steam supply pipe therefor, a valve for controlling the supply of steam to the blower unit, means for rotating the blower unit, meansv associated therewith for opening said valve, and means for automatically acting. on valve opening means, when said. blower rotating means are released, to permit valve to close. in a soot bldiier. tor boilers, a rotatable blower, unit, a steam supply pipe. therefor, a valve for cont-Idling the supply. of steam to the blower u'nit,'a pan-"cream members in cooperative relatien, one of said cam members o] erating to open said. valve and the other cam member operating to. rotate the bltiwer unit, aptuating meansior the cam members, and means operating automatically to pfilimit the valveto clos'e oni releasin g the aptuating means. i l I I 3; In a soot. blower. for boilers, a rotatable blower unit, a. steam supply pipe there lior, afvalve for controlling the supply of steam to the blower unit, ajdrive shaft adapt ed to rotate. the blowe1:.unit, a cam member mennted loosely on said shaft, ineans for, rotating said cam member, a second cam member mounted on said shaft and adapted to be moved longitudinally, on said shaft, on

rotating the first cam member, means for holding the second cam member against rotation relative to the shaft during its movement therealong, suitable connections between the second cam member and valvefor opening the valve during the longitudinal movement. of said cam member, complementary driving. means on the first cam member and sliaft'adapted to come into operatire, engagement after the second. cam member has reached the limit of its movement, and means for restoring the second cam member toitsnormal position on releasing the rotating means of the first cam member.

4. Ina soot blower for boilers, a rotatable lower pipe, a steam supply pipe therefor, a valve for controlling the supply of steam to the blower pipe, a blower-rotating shaft, suitable driving connections between said shaft and blower pipe, a main actuating cam and a valve-actuating cam associated therewith, means. for. rotating through a. given are the main actuating cam to move the valve-actuating cam and open said valve, means for holding the blower rotating shaft against movement while the valve is being opened, and cooperating means between the main actuating cam and blower rotating shaft for actuating said shaft after the valve. has been opened.

In testimony whereof I hereunto, afiix my,

signature.

LEO JNQ. BAYER;