US1465742A - Valve devicf for wood-treating cylinders - Google Patents

Description

3 Sheets-Sheet 1 G. B. SHIPLEY ET AL VALVE DEVICE FOR WOOD TREATING CYLINDERS Filed May 24 Aug. 21

mvzm'oas ATTORNEYS WITNESSESS 62W Aug. 21, 1923. 1,455.742

G. B, SHIPLEY ET AL VALVE DEVICE FOR WOOD TREATING CYLINDERS Filed May 24. 1922 3 Sheets-Sheet 2' f a w 46 v i I i v 4 E 'I' 4/ 0 37 V 40\ /9 Q 60' J2 K 57 J/ 1 a v 53 66 59 49 4.5 A /7 I I8 I i 5: A \H 3, I

wnwzsszss 27 v ATTORNEYS Aug. 21, 1923. 1,465.742 G. B. SHIPLEY ET AL V V VALVE DEVICE FOR WOOD TREATING CYLINDERS Filed May 24, 1922 3 Sheets-Sheet 15 I I: I k: I l d6 ii z dz 63 I 4 I I .37 {I}: 40 g 45 "Q la .4 /3

wrmzsszss -5 filed-e1 ATTORNEYS Pale-ea Aug. at, was.

GT B. SHIPLEY AND JACK B. SHIPLE Y, OF iPITTSBUB G-H, PENNSYLVANIA.

VALVE DEVICE FOR WOOD-TREATING CYLINDERS.

Application filed May 24, 1922. Serial No. 588,812.

To all whom it may concern:

Be it knownthat we, GRANT B. SHIILEY and JACK B. SHIPLEY, citizens of. the United 'States, and residents of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Valve Devices for Woodreating Cylinders, of which the following is a specification.

This invention relates to an apparatus for treating wood or timber, or other similar articles, with an antiseptic solution such as creosote, zinc-chloride or sodium-fluoride,

and particularly to a valve device to be used in connection therewith.

The object of the invention is to .provide a device of the character referred to which is simple in construction, easy to ma= nipulate, durable, efficient in operation, and

which may be fabricated at a nominal cost.

In the treatment of wood or timber with an antiseptic solution, whether the so-called full-'ell or empty-eel process is employed, it is desirable to vent-thetreating cylinder during the filling thereof with the preservative, and to expel the preservative from the treating cylinder under pressure, so as to enable the treating operation to be performed readily and in the minimum period of time.

It is a special object of the invention to v provide a valve mechanism which may be actuated by a single controlling element in order to vent 01' to place the treating cylinder under pressure for the purpose of quickly filling or emptying the cylinder, as desired.

It is also a special obje-t to provide a valve device. which will not only accomplish both the venting and the placing of the treating cylinder under pressure, but,which will operate in a manner to prevent the valves in the vent pipe and pressure conduit being open at the same time.

It is still a furthen object of the in'- vention to provide a valve device which can be easily assembled and disassembled, and in which the several parts comprising the same are readily accessible for replacement or repair.

These and other objects of the invention W1ll l110l8 readily appear when taken in connectlon with the following description and the appended claims.

In the accompanying drawings, Fig. 1 is a diagrammatic elevational view showing the valve device as associated with one end of the treating cylinder; Fig. 2 a transverse sectional view, with parts in elevation, taken 1n a plane to the right of the valve device v as illustrated in Fig. 1; Fig. 3 an enlarged detail sectional view-taken through the valve device proper, with the parts in position to permit the venting of the treating cylinder; and Fig. 4 a view similar to Fig. 3, illustrating the parts in position to establish communication with the pressure conduit for the purpose of discharging the preservative from the treating cylinder.

In the drawin s, 1 designates the treating cylinder, the in et or charging end being shown at 2. The charging end 2 is pro vided with the opening 3 which is closed by a door or gate valve 4 actuated by means of'the usual pressure motor 5, which con- 76 sists of the usual cylinder and piston to the opposite sides of which pressure fluid is admitted or exhausted, as desired, through the pipes 6 and 7. Leading to the bottom of the charging end 2 is a conduit 8 for plying and exhausting the preservative usedin the treating cylinder. v

The top of the charging end is enlarged at one side, as illustrated at 9, and attached at its highest level or elevation, as at 10, is a valve housing 11, the valve housin being supported bymeans of a flanged necl 12 extending from its lower portion which rests upon a similarly flanged portion formed at the upper end of the enlargement 9. One

and of the valve housing is closed by an end plate 13, and the end opposite thereto communicates through an opening 1 with a vacuum conduit 15 provided with a cut-off valve 16. The upper portion of the valve housing is provided with two openings 17 and 18 disposed adjacent the opposite ends thereof WhlCll communicate through suitably formed valvecasings 19 and 20 with a vent pipe 21 and pressure conduit 22, respectively. 1

mounted in the flanged neck 12 and into which is threaded the annulus 24 of another spider 25, the two attached spiders facing in opposite directions so as to provide suitable guides for the main stem 26 and an auxiliary guiding stem 27 of a float valve 28 which cooperates with a valve seat 29 formed on the annulus 24. The upper end of the stem 26 is provided with a bifurcated head 30 which is pivotally connected through a link 31 to the inner end of a float lever 32 pivoted at its inner extremity to the valve housing 11 as at 33, and having attached at its outer extremity the ball float 34. The valve 28 is seated by upward movement thereof, being vertically guided by the stems 26 and 27 which extend through suitably aligned apertures 35 and 36 formed at the center of the two spiders.

Threaded in a web 37 in the valve casing 19 is a ring 38 provided with a valve seating surface with which an upwardly closing valve disk 39 cooperates, the valve disk being guided by means of wings 40 extending upwardly therefrom and engaging the bore of the ring 38 and web 37. The valve 39 is fixed to the lower end of a rod 41 which extends upwardly through a stufling box 42, the lower end of the rod being provided with a head 43 which fits into a recess 44 in the disk 39 and in which it is retained by the threaded plug 45. The upper end of the rod 41 is equipped with the bifurcated head 46 by which it is pivotally connected to one extremity of a lever 47. I

A valve seat ring 48 similar to ring 38 is threaded in the lower portion of the valve casing 20 with which a downwardly seating valve disk 49 cooperates. being vertically guided by the wings 50. The valve disk 49 is attached to the lower end of a rod 50 in a manner similar to the attachment of valve disk 39 with the rod 41. The lower end of rod 50 is provided with a head 51 which is maintained in assembled relation with the valve disk by means of an elongated plug 52, the lower end of which is threaded into a recess 53 of the valve. the plug 52 serving as a stop for limiting the opening movement thereof. The rod 50 extends upwardly through a stufling box 54 and is provided with a bifurcated head 55 at its upper end for pivotally connecting'the rod to theopposite end of the lever 47.

Mounted upon the valve housing and dis- 20 is a cylinder 56 in which a differential piston 57 is mounted for reciprocating movement. The interior of the cylinder 56 is provided with a suitable lining 58. The lower head 59 of piston 57 is of less area than the upper head 60, and the piston is pivotally attached to an intermediate point of the lever 47 as shown at 61 by means of the rod 62 which extends upwardly through a stutfing box 63 in the top of the cylinder 56, the upper end of the rod 62 being equipped with a bifurcated head 64 similar to the heads 46 and 55 attached to the upper ends of the valve rods. The space between the heads 59 and is placed into communication with the atmosphere through a duct 65.

The interior of the valve housing 11 communicates with the vent pipe 21 through the openings 17 and valve casing 19, as previously described, the vent pipe being provided with a check valve 66, as clearly shown in Fig. 1. The vent pipe may either discharge directly to the atmosphere or to any suitable point of low pressure. The interior of the valve housing is likewise placed in communication with the pressure conduit 22 through the opening 18 and valve casing 20, the pressure conduit being constantly supplied with a pressure fluid under considerable pressure. In order to afford access to the interior of the housing, the same is provided with a manhole 67 which is covered by a suitable plate indicated at 68.

Leading to the lower end of the differential piston cylinder 56 is a pressure pipe 69, and leading tothe upper end of said cylinder above the head 60 is a pipe provided with an interposed three-way valve 71, a branch pipe 72 leading from the pipe 69 to the housing of the three-way valve. The pipe 70 extends beyond the valve 71% and is connected at 73 with a waste pipe 74. The waste pipe-74 leads to the casing of a four-way valve 75 which casing is also in communication with the pipe 69 through branch pipe 76, with the pipe'6 through branch pipe 77, and with'pipe 7 through branch pipe 78. l

As is well known in apparatus of this character. the treating cylinder is provided with a discharge end similar in construction to the charging inlet 2 which is likewise equipped with a door or valve similar to that shown at 4. In order to operate the door or valve at the discharge end a pressure motor similar to the one previously de scribed is employed to which pressure fluid may be supplied through the extensions 6' and 7' of pipes 6 and 7.

In order to vent the treating cylinder, and to admit pressure fluid thereto at the discharge end. as well as at the inlet end, to hasten the filling and discharging of the o preservative, a float valve similar to that. posed lntermedlate the valve casings 19 and already described may also be employed at said discharge head. In this instance, merely a housing and float controlled valve similar to valve 28 and float 34 will be employed. omitting the valves 39 and 49 with their actuating mechanism, the valve housing at the discharge end of the cylinder being placed in communication with the vacuum conduit 15 at a point between the cut-ofl' valve 16 and the valve housing 11.

The four-way valve 75 is employed for opening and closing the door or valve 4 by admitting pressure fluid from the pipe 69 to either end of the pressure motor 5 while simultaneously exhausting fluid from the opposite side thereof to the waste pipe 74 in an obvious manner.

After the timber has been charged into the cylinder 1 and the doors moved to their closed position, and it is desired to fill the treating cylinder through the pipe 8, during which time it is desirable to have the top of the cylinder vented, the valve 71 is moved to a position to admit pressure fluid above the larger head 60 of the differential piston 57. Due to the increased area at the upper end of the piston, the same is forced downwardly against the pressure constantly maintained on its lower smaller head thereby causing the vent valve 39 to be moved to its open position, as shown in Fig. 3, the valve 49 being retained on its seat by the pressure fluid from conduit 22 during such operation. The valve 49 being seated downward, movement of the piston 57 causes the lever 47 to fulcrum around the pivotal connection of the head with the lever, causing opening movement of valve 39 in a downward direction. The cylinder 1 is thus vented during the filling of the same with the preservative, the preservative rising through the open valve 28 which is maintained in its lowermost position due to the weight of the float 34 and its attached parts until after the cylinder has become completely filled. As the preservative rises through the neck 12 into the interior of the valve housing 11, the float 34 is raised to the position shown in Fig. 4 closing the valve 28 to prevent the preservative completely filling the entire valve housing, the cut-off valve 16 being maintained closed during this time.

After the material has been treated with preservative and it is desired to remove the preservative from the treating cylinder, the valve 71 is moved to the position shown in Fig. 1 to place the upper end of the cylinder 56 in communication with the waste pipe 74 and thereby remove the pressure from piston 57. As soon as the pressure above the head 60 is relieved, the constant pressure maintained below the smaller head 59 will cause the difl'erential piston to rise, first seating the valve 39 upon its seat to cut off communication between the valve housing 11 and the vent pipe 21, and during the sub: sequent upward movement of the piston 57 after 'valve 39 has been closed, the valve 49 will be raised from its seat to permit pressure fluid from the pressure conduit 22 to be admitted through opening 18- to the interior of the valve housing. The admission of pressure fluid above the preservative in the. valve housing will force the valve 28 open and cause the reservative to be discharged therethroug into the cylinder 1, the preservative within the cylinder being forced through the conduit 8, thus completely emptying the cylinder.

After the cylinder has been completely emptied, the valve 71 is again turned to a position to admit pressure above, the difierential piston 57 to close the valve 49 and again open the valve 39. During the downward movement of piston 57 the valve 49 is first seated, subsequent downward movement of the differential piston causing the opening of valve 39. Due to the proportioning of the parts and the pivoting of the valve rods 41 and 50 upon the opposite ends of the lever47, only one of the valves 39 or 49 will be opened at one time, thus precluding any possibility of both said valves being opened simultaneously.

During the upward movement of the differential piston to open the valve 49 in the pressure conduit, the valve 39 first seats, then the lever 47 fulcrums about its pivotal connection with the head 46 during the opening movement of valve 49, the sequence of operation being opposite to that described in connection with the closing of valve 49 and the opening of valve 39 during the descent of the difi'erential piston, as above set forth. After the valve 49 has been. moved to its closed position, the pressure of the fluid within the conduit 22 functions to maintain the same in such closed position until itis opened due to the actuation of the diflerential piston.

During the venting of the treating cylinder, and the placing of the same under pressure due to the opening and closing of the valves 39 and 49, as above described, the cut-ofi valve 16 in the vacuum conduit 15 is maintained closed, the valve 16 being opened merely to place the treating c linder 1 under reduced pressure in a well mown manner and in the proper sequence in carrying out the treating operation. Since the valve 39 is normally maintained in its open position, as shown in Fig. 3, in order to prevent the breaking of the vacuum during the time during which the valve 16 is open and the treating cylinder is under reduced pressure, the vent pipe 21' is provided with the outwardly opening check valve 66 which prevents back flow through the vent pipe towards the valve housing 11.

Whenever a float valve is also employed in connection with the discharge end, as well as the inlet end, of the cylinder 1, the same will cut off the flow'of preservative through the top thereof as soon as the cyl-inder'has become completely filled, and will permit the pressure fluid admitted through pipe 22 and valve housing 11 to pass into the cylinder to discharge the preservative therefrom whenever the valve device at the inlet end of the cylinder is actuated for such purpose.

It is thus seen that the invention provides a simple, compact and efiicient valve mechanism which may be controlled by merely manipulating the single controlling threeway valve 71 to selectively cause the venting of the treating cylinder, or the placingof the treating cylinder under pressure to discharge the preservative therefrom, and since the valve device is entirely automatic in action, it may be easily manipulated by unskilled artisans without danger of breakage, or the establishment of conditions within the treating cylinder which will prevent the carrying out of the process employed.

We claim: Y

1. In combination in a wood-treating aparatus, a treating cylinder, a valve hous- 111 in communication therewith, a float valve controlling the passage between the cylinder and housing, a vent pipe and pressure conduit in communication with the housing, valves interposed in said pipe and conduit, said valves being connected to the opposite ends of a lever, and pressure means for actuating the said lever attached at an intermediate point thereof.

2. In combination in a wood-treating apparatus, a treating cylinder, a valve housing in communication therewith at Its highest oint, a float valve controlling the passage betwen'the cylinder and housing, a vent pipe and pressure conduit in communication with the housing, valves inter sed in said pipe and condu1t,.said valves ing connected to the opposite ends of a lever, and a pressure actuated means for said lever attached to an intermediate point thereof.

3. In combination in a wood-treating apparatus, a treating cylinder, a valve'housing in communication therewith at its highest level, a float valve controlling the passage between the cylinder and housing,

a vent" ipe and ressure conduit in communication with t e housing, valves interposed in said pipe and conduit, said valves being connected to the opposite ends of a lever, a piston connected to said lever intermediate the ends thereof, and controlling means for admitting pressure to said piston to actuate the same,

4:. The combination in a Wood-treating apparatus, a treating cylinder, a valve housing in communication therewith and at the top thereof, afloat valve controlling the passage between the cylinder and housing,

a vent'pipe and ressure conduit in com-- munication with t e housing, valves interposed in said pipe and conduit, said valves being connected to the opposite ends of a lever, a differential piston pivotally attached to an intermediate point of said lever, a pipe for admitting pressure fluid posed in said pipe and conduit, said valves" being connected to the opposite end of a lever, a difierential piston pivotally attached intermediate the ends of said lever, means for constantly supplying pressure fluid to the smaller head of the plston to raise the same, and means for selectively admitting or exhausting pressure fluid to the larger head of the piston to move the istdon against the pressure on its smaller ea 6. In combination in a wood-treating apparatus, a treating cylinder, a valve housing in communication therewith at the top and at one side of the cylinder, a downwardly opening float valve controlling the assage between the cylinder and valve ousing, 'a float within the housing operati-vely connected to the float valve, a vent pipe and pressure conduit leadingsfrom the up er portion of the housing, downwardly an upwardl opening valves interposed in said pipe and conduit respectively, said last named valves being connected to the opposite ends'of a lever, an actuatin piston operatively connected to the said fiaver intermediate its ends, and control means for reciprocating said piston.

7. In combination in a wood-treating aparatus a treating cylinder, a valve housmg in communication therewith at the top and at one side of the cylinder, a downwardly opening 'float valve controlling the assage between the cylinder and valve ousing, a float within the housing operativelyvconnected to the float valve, a valve controlled vacuum conduit in communication with the valve housing, a vent pipe, a check valve in said pipe, a pressure conduit, both the vent pipe and pressure 'conduit leading from the upper portion of the housing, downwardly and upwardly openmg valves interposed in said pipe and conduit respectively, said last named valve being connected to the opposite ends of a lever, a diflerential piston operatively connected to, said lever intermediate its ends, means for maintaining constant pressure upon the smaller head of the piston to close the vent pipe and open the pressure conduit upon release, of pressure on the larger head thereof, and means for selectively admitting and releasing pressure to the said larger head.

8. In combination in a wood-treating epparatus, a treating cylinder, a valve housmovement thereof, and means for controllng 1n communlcation therewith, a float Im the actuation of said last named means. 10

valve controlling the passage between the 'n testimony whereof, we sign our names. cylinder and housing, a vent pipe and pre- GRANT B. SHIPLEY'. sure conduit in communication with the JACK B. SHIPLEY. housing, valves interposed in said pipe and Witnesses:

conduit, a single means for actuating both ERNEST G. PARK,

said valves but preventing simultaneous M. R. Home?

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