US2059193A - bayer - Google Patents

Description

L. J. BAYER SOOT BLOWER Nov. 3, 1936,

Filed May 28, 1936 5 Sheets-Sheet 1 Eo J. BAYER, 5)/ y rromvfr NOV. 3, i936.. L 1 BAYER 2,059,193

' sooT BLOWER Filed May 28, 1936 5 Sheets-Sheet 2 /N VEA/Top: Eo J. 5A YER,

NOV. 3, 1936 1 BAYER l 2,059,193

SOOT BLOWER Filed May 28, 1936 3 Sheets-Sheet 5 /NL/EA/Toe: Eo J. 5A Yee HTToe/VEK Patented Nov. 3, 1936 U ED STATE Claims.

My invention has relation to improvements in boiler cleaners and it consists in the novel features of construction more fully set forth in the specication and pointed out in the claims. The

5 present invention is an improvement over that described in my co-pending application, filed January l2, 1935, under Serial No. 1,527, and is die rected to the same general type of boiler cleaner wherein a boiler` tube is rotatably mounted with relation to the boiler tubes for the purpose of removing the soot and ash accumulation therefrom.

Like the structure of my aforesaid application, the principal object of the present invention is to l5 provide a boiler cleaner in which the valve actuating mechanism and the blower tube rotating mechanism are independent but, at the same time, are operated by a single actuating means. The present invention also has the advantage o that after the opening of the valve, the blower tube may be rotated through an arc of any predetermined amount, after which the valve may be closed and the blower tube restored to its starting position. In other words, the blowing arc is variable.

The present invention differs, however, from that of the application aforesaid in that it is impossible to operate the blower in any other manner than the xed sequence of operations 30 comprising a complete cycle. In other words, when the operator once starts the operation of the blower, he must continue through each step in the operation until the blower is again brought to its position of rest. This is accomplished by providing suitable mechanism wherein the parts are, in effect, locked after each operating phase.

This advantage, as well as other advantages inherent in the invention, will be better apparent from a detailed description of the invention in 40 connection with the accompanying drawings, in

which:

Figure l is a side elevation of my improved boiler cleaner with parts shown in section; Fig. 2 is a top plan view of the invention; Fig. 3 is a 4,1,- vertical sectional detail taken on the line 3 3 of Fig. 1 and showing the clutch members in the hub of the driving sheave; Fig. 4 is a vertical cross section taken on the line li-ii of Fig. 2; Fig. 5 is a vertical cross section taken on the line 50 5 5 of Fig. 2; Fig. 6 is a cross sectional detail taken on the line 6 6 of Fig. 4; Fig. 7 is a vertical cross section taken on the line 7 1 of Fig. 1; Fig. 8 is -a vertical cross section taken on the line 3 3 of Fig. 1; Fig. 9 is a vertical 55 longitudinal section taken on the line 9 9 0f nozzle of the blower tube.

Fig. 2; Fig. 10 is a horizontal longitudinal section taken on the plane indicated by the line iB l IJ of Fig. 9; Fig. 11 is a cross sectional detail taken on the line M l of Fig. 1; Fig. 12 is a side View of the combined ratchet and cam for operating the 5 blower v-alve; Fig. 13 is a side View of the same ratchet and cam but looking to the opposite side to that shown in Fig. 12; Figs. 14 and 15 are side and end views, respectively, of the cam pin for c0- operating with the lock bar to lock the mecha- 10 nism after each phase of the operation. Fig. 16

is a diagrammatic View showing the manner of rotating the drive sheave for each phase in the operation of the mechanism. Figs. 17 to 22, inclusive, are diagrammatic views showing the respective positions of the actuating parts when the blower is idle or at rest.

Figs. 23 to 28, inclusive, are diagrammatic views corresponding to those shown in Figs. 17 to 22 with the mechanism actuated, however, to open the valve to effect a discharge of steam from the Fig. 29 shows the clutch members after the drive sheave has been turned in a clock-wise direction to take up the idle motion preparatory to rotating the blower tube. Figs. 30 and 31 show the position of the gear wheel that rotates the blower tube just before one of the cam pins engages with the lock bar preparatory to locking the parts at the end of the blowing operation. Figs. 32 and 33 corre- 30 spond to Figs. 30 and 31 except that the parts are now shown in their positions at the end of the rotation of the blower tube. Figs. 34 to 37, inclusive, show the position of the parts corresponding Vto Figs. 17 to 20, inclusive, and 23 to- 35 26, inclusive, at the end of the blowing operation but with the valve still open; Fig. 38 shows the position of the lock bar at the moment the parts shown in Fig. 36 are released so that they may assume the position shown in Fig. 41; Figs. 40 39 to 42, inclusive, show the parts corresponding to those in Figs. 34 to 37, inclusive, after the valve has been closed following the blowing operation; Fig. 43 shows the relative positions of the cam pins during the return of the blower tube to its initial at rest position; Fig. 44 shows the second cam pin cooperating with the lock bar to lock the parts at the end of the operation of restoring the blower tube;

And Figs. 45 to 48, inclusive, show the relative 50 positions of the parts corresponding to those shown in Figs, 39 to 42, inclusive, at the completion of the blowing operation but before the hand wheel has been restored to the position shown in Fig. 17, from which position a repetition of the various phases of the operation may be performed.

Referring to the drawings, B indicates the wall of a boiler on which my improved boiler cleaner is mounted. According to the established practice, a hollow casing I, known as a wall sleeve, is fixed in an opening O in the boiler wall and a supporting bracket 2 is secured by suitable bolts 3 to a flange 4 formed on the wall sleeve I. The member 2 serves to support the blower head through the stud 5 traversing the forwardly extending arm 2 of the member 2, said stud being screw-threaded into a boss 6 depending from a bearing member 8 formed in a bracket 1. A tube 9 passes through the bearing member 8, and the forward end of said tube is swiveled in a branch I8 of valve casing II. A stuing box comprising a gland I2 and packing i3 is disposed in the branch I in order to make the joint between the tube 9 and said ilange steam tight. The inner end of the tube 9 is screw-threaded into the hub I4 of a gear wheel I5 and a flange member I6 is bolted to the gear wheel I5, said fiange member having a threaded opening I1 to receive the outer end of blower tube I8. Thus, the blower tube I8 and the tube 9 are connected so as to operate as a unit. The tube 9, branch I0 and valve casing I I comprise the blower head supported on the stud 5 through the bearing member 8. A spring I9 surrounds the stud 5 and is interposed between a perforated plate 28 and a washer 2| for the purpose of flexibly supporting the blower head.

Within the valve casing I I is a removable valve seat 22 for receiving the main steam valve 23 which is provided with a hollow stem 24 and a guide cylinder 25, and is traversed by a valve stem 26, on the end of which is a pilot valve 21 well known in the art and described more in detail in my co-pending application, Serial No. 1,527, led January l2, l935.

The valve stem 26 projects upwardly beyond the Valve casing I I and is surrounded by a coiled spring 21 for maintaining the Valve on its seat unless the tension of said spring 21' is overcome by the mechanism provided for opening the valve, which will be described hereinafter.

The valve casing II is provided with a flange I I to which is secured, in any desirable manner, a steam supply pipe or riser R.

The parts thus far described are all old in the art and are not specically claimed herein. They are described so that the real invention, which is the mechanism for actuating the valve 23 and rotating the blower tube I8, may be better understood. This actutaing mechanism is constructed as follows:

Blower actuating mechanism The bracket member 1 is secured by means of bolts 28 to the upper surface 29 of the valve casing branch Ill and supporting standards 38, 3I project upwardly from the inner and outer end, respectively, of the member 1. The standards 30 and 3I are provided with bearings 32, 33, respectively, for supporting a shaft 34, the forward end of which extends a considerable distance beyond standard 3|. A clutch member 35 is keyed, or otherwise xed, to the projecting end of shaft 34 and a chain sheave 36 is loosely mounted on the shaft 34 adjacent to the clutch member 35 and the clutch member and sheave have cooperating lugs 31, 38, respectively, between which there is approxmtaely 120 degrees of play or free motion. Obviously, on rotating the sheave 36, this free motion must be taken up before the lug 38 will engage lug 31 to rotate the shaft 34.

The valve actuating mechanism is mounted on shaft 34 between the sheave 36 and the standard 3l. It comprises a housing 39, the sides 40, 4I of which have aligned openings 42, 43 whereby the housing 39 is loosely mounted on the shaft 34. The side 4D adjacent to the sheave 36 has a perforated ear 44 on which is pivoted a dog 45 by means of a pivot pin 46. The nose of said dog is in cooperative engagement with teeth t of a ratchet 41, integrally formed with' a cam 48. The cam 48 has oppositely disposed high sides 49, 49 and oppositely disposed low sides 58, 58, while the ratchet 41 has four teeth t so that every time the ratchet 41 is advanced one tooth, the cam 48 is rotated degrees. Thus, the Valve stem 21, which is actuated by the cam 48 through the intervention of a lever 5I, will move either up or down every time the cam 48 is actuated.

In the web 36 of the sheave 36 there is formed an axially inclined cylindrical enlargement, within which is a socket 52, the upper end of said socket being screw-threaded to receive a plug 53 and the lower end communicating with an inclined bore 54, through which passes a pin 55 between the head 56 of which and the plug 53 is a coiled spring 5'I for the purpose of exerting outward pressure on the pin 55 to hold the end thereof in the path of a latch 58 slidingly mounted in an opening 59 formed in an enlargement 6I] extending out from the periphery of the housing 39. The latch 58 has an intermediate shoulder 58 for abutting against an offset 6I in the opening 59 whereby the latch 58 is confined within said opening.

The inner end of the latch 58 is bifurcated to receive a roller 62 which rides over the. arcuate flanged portion 83 of the standard 3l when the housing 39 is rotated. The rotation of the housing 39 is caused by a rotation of the sheave 3S in a counter-clockwise direction (looking from the front of the device) and the engagement of the pin 55 with the beveled end 64 of the latch 58. As the sheave 36 rotates, it picks up the latch 58, together with the housing 39, rotating the latter and causing the roller 62 to ride over the arcuate ilanged portion 83. Adjacent to the upper end of the. arcuate portion 93 is a depression 65 into which the roller 62 moves, permitting the latch 58 to slide rearwardly out of the path of the pin 55, whereupon the pin is released from the latch and moves past the same until the. play between the clutch members 31 and 38 is taken up. During this rotation of the housing 39, the cam 48 has also been rotated so as to depress the lever 5I and valve stem 21 to open the. valve. A pair of guide ribs 66, 66 are formed on the bracket 1 and extend forwardly from the standard 30, which ribs, together with a plate 61 secured over them, serve to conne a block 68 having a tapped opening 69 in which is threaded one end of a lock bar 18. The opposite (forward) end of the lock bar 16 cooperates with the housing 39 in a manner to be presently described. The block 68 is slidable on the standard 1 and is constantly urged forward by means of a spring 1I seated in a socket 12 in the block and having bearing against the inner surface of standard 38. The block 68 has a bifurcated portion 13 below the socket 12 for receiving a trigger member 14 pivoted in said bifurcated member by means of a pin 15.

The trigger member 14 has three recesses 16, 11 and 18 formed on its inner end for cooperation with a ball 19 disposed in a socket 88 and urged outwardly by means of a coiled spring 8l. 'The `trigger member 14 may be rocked on the pivot 15 to occupy any one of three positions, depending upon whether the ball 19 is in recess 16, 11 or 18. The trigger member 14 extends through an opening 82 in the standard 39 and has oppositely disposed inclined slots 83 and 84 formed in its projecting end for engagement with cam members 85 and 86 on gear wheel I5 for the purpose hereinafter to appear. The wall 4I of housing 39 is provided with a peripheral notch 81 at a point approximately opposite to the enlargement 60 and just beyond the notch 81 the wall is offset so as to provide an overhanging portion 88, the outer surface of which is beveled to provide a cam element 89. The forward end 99 of thelock bar 10 is of reduced diameter and traverses an opening 9| in the standard 3l (Fig. 6). When the valve 23 is closed, the lock bar 19 is pushed forwardly by the spring 1I so that its extremity 90 projects beyond the standard 3| and in the path of the cam element 89 so that on rotation of the housing 39, the cam element engages the end 99 of the lock bar 19, pushing it rearwardly until the notch 81 comes into alignment with the lock bar 19, when the end 99 thereof will snap into said notch and hold the housing 39 and the other parts of the valve actuating mechanism in locked position. When the housing 39 is thus locked, the valve will obviously be locked in open position.

A pinion 34' is fixed on the inner end of shaft 34 and is in operative engagement with the gear wheel I5 and when the. sheave 38 is rotated in a clockwise direction (after having opened the valve), this pinion will impart rotation to the gear wheel I5 and blower tube i8 connected thereto. The rotation of the sheave 39 is effected by a chain C passing thereover.

The cam member 85 is provided with a stem 85 by means of which it is securely fixed into a boss 92 formed within the tooth rim of the gear I5 and when the blower is at rest, the position o-f said carn 85 is as shown in Fig. 8, immediately adjacent to the free end of trigger member 14. At the beginning of the rotation of gear I5, the cam member 85 depresses the trigger member 14 so that the ball 19 will enter recess 16, causing the notch 84 to come into the path of cam member 86. The cam member 86 is also provided with a pin 86 by means of which it is securely fixed on the forward end of an L-shaped stop member 93 projecting outwardly from a hub I5 of gear I5. The rotation of gear wheel l5 is arrested by the engagement of a stop member 93 with a boss 94 projecting from the. rear of standard 39. However, just before stop member 93 impinges on the boss 94, the tapered nose 95 of the stop member 93 slides under the end of the trigger member 14 to raise the same sufficiently so that the cam member 86 will enter the notch 84 and pull the block 68, and, of course, lock bar 19 rearwardly until the end 99 of lock bar 10 is disengaged from the notch 81 to release the housing 39.

The housing 39 thereupon immediately rotates back to its original position under the influence of a coiled spring 96 wrapped about the shaft 34 between standard 3I and housing 39. One end of the spring 96 is secured tothe standard 3I by a pin 91 and the other end of the spring is secured to housing 39 to a pin 98.

The plane surface 92 of the boss 92 engages the top of the free end of trigger member 14 during the return rotation of the gear I5 in order to adjust the position thereof so that the cam 85 will enter the slot 83 for the purpose of pulling the trigger member 14 rearwardly to effect a release of the housing 39 by withdrawing the end 99 of the lock bar 18 of the notch 81.

The various steps in the operation of the invention and the relative positions of the parts will be more easily understood by references to the diagrammatic views, Figs. 1'7 to 44, inclusive, whereof Figs. 17 to 22 show the respective positions of the parts when the blower is at rest. If

the operator now pu'lls on the chain C so as to r0- tate the sheave 36 in a counter-clockwise direction, the play between clutch lugs 31 and 38 will be taken up, during which time the pin 55 projecting from the sheave engages latch 58 and rocks the housing 39 in a counter-clockwise direction until it assumes the position shown in Fig. 25, at which time, the latch enters the depression 65 in the flange 63 of standard 3| to release the pin 55, as shown in Fig. 24. Obviously, the rtation of the housing 39 carries the dog 45 with it to rotate the ratchet 41 through an arc of 90 degrees.

The rotation of the ratchet 41 actuates the cam 48 so that the high side 49 thereof engages the lever I toy depress the valve Stem 21, as shown in Fig. 26. As the housing 39 rotates, the cam surface 88 forces the lock bar 18 rearwardly until the recess 81 registers therewith, at which time, the lock bar will snap into said recess under the pressure of spring 1I whereupon the housing 39, together with the valve operating parts therein, are securely locked in place. Up to this time, the blower tube has not rotated, since the gear whe-,el I5 has not moved, and, of course, the cam member 85 remains in the same position (Fig. 28) that it occupied before the operation.

The next operation is the rotation of the blower tube I8 which is effected by rotating thevchain sheave 36 in a clockwise direction. clutch play has been taken up, the clutch lugs 31 and 38 are in engagement, as shown in Fig. 29, whereupon a continued rotation of the sheave 36 in a clockwise direction will rotate shaft 34 and, of course, pinion 34', which in turn rotates gear wheel I5 and blower tube I8. As the gear I5 rotates, cam 85 passes over the end of trigger member 14 depressing the inner end thereof so that the nose 95 of the stop member 93 will slide under the end of the trigger member, raising it to its intermediate position to permit cam member 86 to enter slot 84 thereof and withdraw the stop bar 18 from notch 81 to release the housing 39 which will immediately be rocked back to its initial position. This action is shown in Figs, 30 to 36, inclusive. However, the valve is still held in open position as the valve actuating cam 48 has not moved, as shown in Fig. 37.

The engagement of the stop lug 93 with the boss 94 arrests further rotation of the gear I5 and the blowing arc has been traversed in one direction. The operator now rotates the sheave 36 again in a counter-clockwise direction, whereupon the housing 39 is again oscillated as it was in the opening of the valve, during which oscillation, the dog 45 again advances ratchet 41 through 90 degrees and the cam 48 is moved so that one of the low sides 50 thereof is in engagement with the lever 5I to permit the valve stem 21 to rise and close the steam valve 23.v When this is done, the parts are in the positions shown in Figs. 39 to 42, inclusive. Now, by continuing to rotate the sheave 36 in a counter-clockwise direction, the clutch lugs 31 and 38 again engage and pinion 34 rotates gear I5 in the opposite direction to After the that in which it was rst rotated so as to restore the blower tube I8 to its original position. Just before the blower tube reaches its original position, the plane surface 92' of the boss 92 rides over the inner end of trigger member 'I4 to depress said trigger member and restore it to its intermediate position so that cam member vmay enter slot 83 land withdraw stop bar 'l0 to again effect a releaseY of housing 39 which will immediately, upon being released, assume the position shown in Fig. 47 and the valve operating parts are again in the position they originally occupied. In Fig. 43 the cam member 85 is shown approaching the trigger member 14 and in Fig. 44 said cam member is shown passing through slot 83 of the trigger member.

It is apparent from the foregoing that the blower can not be operated in any manner eX- cept that in which the correct sequence of operations is passed through.

In other words, after the valve is opened, the parts are locked so as to maintain the valve in open position and the rotation of the blower tube must follow the opening of the valve. lNhen the blower tube has rotated through its blowing arc, further motion is arrested and no function can be performed except the closing of the valve. When the valve is closed, it is impossible to perform any operation other than the restoring of the blower tube to its at rest position. When this has been done, the chain sheave must be latched or brought back to its starting position before any further operations can be performed. This sequence of operations with respect to the manner of manipulating the chain sheave is shown diagrammatically in Fig. 16.

Having described my invention, I claim:

1. A boiler cleaner comprising a rotatable blower tube, an operating head connected with said tube, a supporting bracket for said head, a valve casing in communication with said blower tube, a valve in said casing, and operating mechanism carried by said Valve casing; said operating mechanism including Valve actuating means, blower tube actuating means, and a common prime actuator for both said actuating means; said blower actuating means comprising a gear wheel fixed to the blower tube, and driving means connected with a definite amount of free motion to the prime actuator and connected to said gear, said valve actuating means comprising a housing mounted for oscillation adjacent to the prime actuator, a valve cam associated with said housing, means on the housing for connecting the valve cam with the housing when the latter rotates in one direction, coupling elements on the prime actuator and the housing, and a valve stem operatively associated with said valve cam; and a locking element comprising a slidingly mounted bar having one end in operative association with the housing to hold said housing against movement after being oscillated to actaute the Valve cam, cam elements in spaced relation on the gear wheel, and means on the opposite end of the bar for cooperating with said cam elements to effect a release of said bar.

2. A boiler cleaner comprising a rotatable blower tube, an operating head connected with said tube, a valve casing in communication with said blower tube, a valve in said casing, and operating mechanism carried by said valve casing; an operating sheave interconnected with both the valve and the blower tube, means associated with the operating mechanism for opening and closing the valve with a rotation of the sheave in one direction, the construction and arrangement of the parts being such that a rotation of the sheave in the reverse direction operates to rotate the blower tube between the opening and the closing of the valve.

3. A boiler cleaner comprising a rotatable blower tube, an operating head connected with said tube, a supporting bracket for said head, a valve casing in communication with said blower tube, a Valve in said casing, and operating mechanism carried by said valve casing; an operating sheave interconnected with both the valve and the blower tube, means associated with the operating mechanism for opening and closing the valve with a rotation of the sheave in one direction, the construction and arrangement of the parts being such that a rotation of the sheave in the reverse direction operates to rotate the blower tube between the opening and the closing of the valve, said blower tube also being rotated to its initial position after the valve has been closed.

4. A boiler cleaner having a rotatable blower tube, a valve for admitting steam thereto, means for opening and closing the valve, means for locking the valve in both open and closed positions, means for rotating the blower tube effective thereon after having locked the Valve in both open and closed positions, and means for unlocking the valve effective after rotation of the blower tube to its initial position of rest.

5. A boiler cleaner having a rotatable blower tube, a valve for admitting steam thereto, means for opening and closing the valve, means for rotating the blower tube in one direction after opening the valve, and in the reverse direction after having closed the valve, and means interposed between the valve operating means and the blower tube operating means for permanently xing said cycle of operations.

LEO J. BAYER.

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