US1676479A

US1676479A - Poration

Info

Publication number: US1676479A
Authority: US
Publication date: 1928-07-10
Anticipated expiration: 1945-07-10

Description

I July 1-0, 1928. 1,676,479

w. A. cooK ET AL SOOT BLOWER Filed April '7, 1924 2 o f/w m ATTORNEYS.

Patented July 10, 1928.

warren stares I 1,676,479 rarest QEHQE.

WILLIAM A. COOK AND EVERETT I.STEOUP, OF MARION, INDIANA, ASSIGNORS T MARION MACHINE, FOUNDRY & SUPPLY COMPANY, OF MARION, INDIANA, ACOR- PORATION.

SOOT BLOWER.

Application filed April 7,

The object of thisinvention is to imprOVe .the operation of soot blowers by enabling the steam valve to be operated while the blowtube is at rest and to have the valve open and substantially in full blast position .before, and during rotation of the blow tube and closed only after such rotation ceases.

The full nature of the invention will be understood from the accompanying drawings and the following description and claims parts therein shown in the position when the valve operating means ceases to rotate the blow tube. Fig. 4 is asectional view of the steam valve mechanism when partially opened and when the sprocket wheel is in the position shown in Fig. 3. Fig. 5 is similar to Figs. 2 and 3 and shows the sprocket wheel at the beginning of the tube movement, the pin 51 being shown as having just passed under cam 50. Fig. 6- is the same as Fig. l showing thesteam valve when open full.

In the drawings there is shown a wall box 10 adapted to be mounted in a steam boiler in rigid position and extending towards the fines, not shown, and havingan outer head plate 11 to which the soot blower is mounted. Within and longitudinally of the wall box, the blow tube 12 is located,

it having nozzles not shown forthe exit of steam therefrom for d recting the steam against the boilertubes,,as is well known in this art. The outer end of the tube 12 is screwed or otherwise secured in a tubular coupling 13 carrying a sleeve 1 L rotatably mounted in the plate 11. The outer endof the cou'pling13 is screwed or otherwise secured to a swivel tube 15 that extends to the outer end of the blow head mechanism. It is observed that the swival tube 15, coupling 13 and blow tube 12 constitute one continuous rotatable tubular construction or conduit for the passage of steam to and through the blow tube.

The steam enters the swivel tube 1-5 1924. Serial No. 704,773.

through an annular series ofports 16 and through which steam passesfroni a gooseneck forsteam pipe 17 which is supplied withsteam through a pipe 18. The goose- ;neck-is held in place by a bar19 which is bolted by .a bolt 20 to the plate 11. The gooseneck is formed of a lower pipe that is coupled by means of the bolts 21 with a valve chamber 22 having a port 23 adapted to be controlled by the steam valve 24 on a stem 25 mounted in a guide 26, so that said guide and stem are horizontal and the valve 2e operates horizontally. .The steam passing the valve 24 enters an annular steam chamber 27 that surrounds the

swival tube

1,5,.and the ports 16 therein,-as shown. This steam chamber 27 is stationary and there the swivaltube 15 so that the latter can rotate and the joints be steam tight.

The blow tube 12 is notcontinuously rotated and, therefore, the-sprocket wheel 30 is not rigidly mounted thereon, but its hub 31 is rotatably mounted on the coupling 13. This sprocket wheel 30 is operated by a chain, not shown, which hangsdown so as to be accessible to the workman, as is well known inthis art. The sprocket wheel 30 has on its outer face an annular spurgear 3,2;heldbybolts 33 and said spur gear meshes witha pinion 34 secured on the valve stem 25. The valve stem is screw threaded in the guide 26 so that when the pinion 34 is rotated inione direction, the valve 24 will be moved so as .to open and when rotated in 1GV6IS8"(llICtlOI1, said valvewill be moved The gearing maybe such j that the valve'stem and pinion 3 1 .will be so as to close.

given one revolution by a quarter turn ofthe sprocket wheel, which will remove the valve 24 laterally the distance of one'thread on the are suitable packing joints between it and i stem.25, although the invention is not limited to the exact degreeof the above-specified gearing and valve movement. YVhen the sprocket wheel s moved in the direction 'of the arrow shown in Fig. 5, it will give the valve an opening movement and when .moved inthe opposite direction, see F g.3,

it will give a closing movement.

The sprocket wheel rotates the blow tube construction through the instrumentality of .a pawl 40'secured on a pin 41 which is loose- 1y pivoted in ,an earor eXtension42 from the hub 31 of the sprocket wheel, and a spring 43 tends to hold a flat tooth 44: of the pawl in the rectangular notch 45 longitudinally cut in the periphery ofthe sleeve 14, which sleeve is secured on the coupling 13 and causes it and the tubes 12 and15 to turn.

The stationary plate 11 has an annular undercut groove 46 in the outer face thereof concentric with the axis ofthe sprocket wheel 30, sleeve 1 1 and tubes 12, 13 and 15. Adjustably and rigidly mounted in that groove is a headed nut 47 which pivotally supports and extends through a cam arm 48 curved concentric with. the sleeve l t-and held against the latter by a spring 49. On

the end of. said arm 48 there is aforwardlyextending cam plate 50, shown by dotted lines in Fig.1, and in side elevation in Fig. 2. lhis cam plate 50 projects forwardly into the path of pin 51 ot' the pawl 40, as seen in Fig. 1. Pin 51 may pass under cam 50.

The operation of the device is as follows:

Assume the parts to be in position as shown in Figs. 1 and 2, with the steam valve partially opened, and the pawl 40 in the notch 45 ofthe sleeve 14. of the coupling 13 of the in Fig; 3, which lifts the pawl out of the notch 45. The blow tube now remains stationary and steam thereafter is cut oil by the complete closing of the valve 24 through further counter-clockwise rotation of the sprocket 30.

Reverse turning of the sprocket wheel in the direction of the arrow seen in Fig. 5, will first open the valve 24:. Continued clockwise movement of the sprocket 30 permits the tooth 44 of the pawl 40 to seat in the notch 45 and thus carry the tube 12 with said sprocket.

Prior to the time the tooth 44- seats in the notch 45, the blow tube 12 is stationary and receiving the full steam blast and directing the same against the boiler tubes. T he clockwise rotation of the sprocket 30 may be continued until the desired degree of blow tube rotation, i. e., 320 degrees, has been made. whereupon themovement of the sprocket 30 is reversed.

It'is thus seen that in operation'of this soot blower, the steam valve will be opened before the blow tube begins to turn and this admits a charge of steam to the blow tube when it begins to turn at full pressure; that the blow tube will be turned to the desired position to obtain the best action on the boiler tubes; that the blow tube when rotating is supplied with full steam pressure; and that the blow tube remains stationary while the valve is closing.

One advantage of this blower over other blowers is that the valve is operable while the blow tube is at rest, and when it starts to turn the valve is appreciably open. Steam action is assured as soon as the tube begins to turn and it is continuous while the blow.-tube is moving or when said tube is held stationary in an intermediate position.

The invention claimed is:

1. A. soot blower including a. rotary blow tube construction, means for supplying steam thereto, a steam valve for controlling said steam supply, a wheel loosely and rotatably mounted on the blow tube construc tion and adapted to operate the valve and open and close the same and rotate the blow tube construction, and means for disengaging said wheel from the blow tube construction during a part of the cycle of the operation of the device.

2. A soot blower including ablow tube construction, means for supplying steam thereto, a steam valve for controlling said steam supply, a sprocket wheel loosely mounted on the blow tube construction, means whereby rotation of said sprocket wheel operates the valve, a pawl connected with the sprocket wheel for engaging the blow tube construction and rotating it with said sprocket wheel, and stationary means for disengaging said pawl from theblow tube construction whereby the sprocket may continue to rotate without rotating said tube construction.

3. A soot blower including a blow tube construction, means for supplying steam thereto, a steam valve for controlling said steam supply, asprocket wheel loosely mounted on the blow tube construction,

means whereby rotation of said sprocket can be adjusted for predetermining the initi ation of rotation of the blow tube.

4; A soot blower including a rotatable blow tube construction, a steam supply pipe for supplying steam thereto, a steam valve for controlling said steam supply which is provided with a threaded stem whereby when it is turned in one direction the valve will be opened and when turned in the opposite direction the valve will close, a pinion on said valve stem, a sprocket wheel mounted on said blow tube construction and adapted to give the blow tube rotary movement, and a gear secured on the side of the sprocket wheel concentric therewith and meshing with said pinion, whereby the valve stem, a sprocket wheel loosely mounted on said blow tube construction, a gear secured on the side of said sprocket Wheel Concentric therewith for driving said pinion, and a releasable pawl connected with said sprocket wheel adapted to engage the blow tube con struction and rotate it in either direction'o rotation of the sprocket wheel.

6. A soot blower including a rotatable blow tube construction, a steam pipe for supplying steam thereto, a valve for controlling the steam supply which is mounted on a threaded valve stem, a pinion on said valve stem, a sprocket wheel loosely mounted on said blow tube construction, a gear on said 3 sprocket wheel for driving said pinion, a

pawl connected with said sprocket wheel adapted to engage the blow tube construction and rotate it; in either direction of rotation of the sprocket wheel, and a cam adapted to disengage said pawl at a certain period of the rotary movement of the sprocket wheel.

7. A soot blower including a rotatable blow tube construction, a steam pipe for supplying steam thereto, a valve for controlling the steam supply which is mounted on a threaded valve stem, a pinion on said valve stem, a sprocket wheel loosely mounted on said tube construction, a gear on said sprocket wheel for driving said pinion, a pawl connected with said sprocket wheel adapted to engage the blow tube construction and rotate it in eitherv direction of rotation of the sprocket wheel, a cam adapted to disengage saidrpawl at a certain period of the rotary movement of the sprocket wheel, and means for mounting said cam so it will be adjustable in a line concentric to the axis of the sprocket wheel.

8. A soot blower including a rotatable blow tube construction, a stationary plate surrounding the same and in which it is mounted, said plate having an undercut groove in its outer face concentric with the axis of the blow tube, a pipe for supplying steam to said blow tube construction, a valve for controlling said steam supply, a sprocket wheel'loosely mounted on the blow tube construction, means whereby the sprocket wheel when turned in one direction will open the valve and when turned in the opposite direction will close the valve, a pawl carried by the sprocket wheel adapted to engage the soot blower construction and rotate the same, and a spring-held arm adjustably mounted in the said undercut slot in said plate and curved concentric with the axis of the blow tube and having a cam on its free end in position to engage the pawl for disengaging it. from the blow tube construction, whereby the latter will be stationary during a part of the cycle of operation of the device.

9. A soot blower including a'rotatable vblow tube construction, a stationary plate surrounding the same and in which. it is mounted, said plate having an undercut groove in its outer face concentric with the axis of the blow tube, a pipet'or supplying steam to said blow tube construction, a valve for controlling said steam supply, a sprocket wheel loosely mounted on the blow tube construction, means whereby the sprocket wheel when turned in one direction will open the valve and when turned in the opposite direction will close the valve, a pawl carried by the sprocket wheel adapted toengage the soot blower construction and rotate the same,

and aspring-held arm adjustably mounted in the said undercut slot in said plate and curved concentric with the axis of the blow tube and having a cam on 1ts free end 1n position to engagethe pawl for disengaging it from the blow tube construction whereby the latter will be stationary during a part of the cycle of operation of the device, and said cam also being shapedfso as to permit engagement of the pawl with the blow tube construction on the reverse movement of the sprocket wheel.

10. In a. soot blower,'the combination of a blower arm, means for oscillatingthe same, means for supplying steam to said arm, a horizontally disposed valve for controlling said supply means, said valve having a rotary stem extending in the same direction as the blower arm, a gear on said stem and a gear on said arm engageable with the first gear to transmit motion to the valve stem from the arm.

In witness whereof, we have hereunto aflixed our signatures.

WM. A. COOK; EVERETT PQSTROUP.