US143193A - Improvement in balanced valves - Google Patents

Improvement in balanced valves Download PDF

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US143193A
US143193A US143193DA US143193A US 143193 A US143193 A US 143193A US 143193D A US143193D A US 143193DA US 143193 A US143193 A US 143193A
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valve
steam
cylinder
improvement
valves
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
    • F16K3/16—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together
    • F16K3/18—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together by movement of the closure members
    • F16K3/188—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together by movement of the closure members by means of hydraulic forces

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  • This invention has relationto steam chests and valves known as balance slide -valves; and consists of a hollow valve, through which the steam passes to the cylinder of the engine by means of the ordinary steam-ports.
  • This valve slides upon the valve-seats of the steam-chest, as is ⁇ usual with such valves, and has at its top an opening for the passage of steam, and a seat upon which a packing-ring rides.
  • This packing-ring lits inside of a cylinder, and is held to its placeby a follower and springor its equivalent.
  • Figure l is a side view of my improved balance slide -valve; Fig. 2, a longitudinal section thereof Fig. 3, a top view of the interior of the valve chest 5 Fig. 4, a detached view.
  • A represents the cover to the steam-chest.
  • B is the hollow valve. (l is the valve-seat and chest-bottom. D is the case or sides of chest.
  • E, Fig. 4, is the transparent cover to the opening in steam-chest.
  • F is the cylinder in which the packingring a and follower b are held.
  • e is a rigid cross-bar, througlnwhich a set-screw passes to hold and adjust the spring d.
  • h is the valve-stem, and g the yoke, by which the valve is moved.
  • the inside diameter of the cylinder F is made one-third larger in area than the areas of bothreceiving-ports 7a k, to equalize the back pressure of steam from the cylinder when cut oft' by the lap of the valve or link motion.
  • the ribs ff serve as guides for the valve B, and slide against Vthe sides of the cylinder F.
  • This valve is applicable for a throttle-valve, or for any other purpose where a balancevalve is desirable.
  • the area of the cylinder F is made equal to the area of both ports or openings for the pas'- ⁇ sage of steam, as there is in this case no back pressure.
  • the packing-,ringe is drilled edgewise its entire width, and thenI cut open tangentially to the inside circle ot' the ring, the cut passing through the center of the hole, as shown in Fig. 4.
  • the pin a is fitted, and its head let in to the edge of the ring so as to cover the opening, and thus make a perfect steam-joint.
  • the pin a' entering the split in the ring a, the latter can be held in a iirm position, and produces a perfect and tight joint between the surface c of the valve and the top of the chest.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Turbines (AREA)

Description

. H. STM BS.
Balanced Valves.
No. 143,193, PatentedSaptember23 ,1873.
Tig.
l Wv'ne se@ I UNITnp STATES PATENT CFFIGE.
Josnrn n. sToMB's, or wrNoNA, MINNEsoTA.
lmPRovEMENT IN'BALANCED vAlvEs.
Specificationforming part of Letters Patent No. 143,193, dated September 23,1573; application filed March 24, 1873.
To all whom it may concern: l l
Be it known that I, JOSEPH H. STOMBS, of Winona, in the county of Winona and State of Minnesota, have invented certain new and useful Improvements in Balance Slide-Valves and I do hereby declare that the following is a full, clear, and exact description thereof that will enable others skilled in the art to which it appertains to make and use the same, refer-4 ence ybeing had to the accompanying drawings and to the letters of reference marked thereon, which form a part of this specification.
This invention has relationto steam chests and valves known as balance slide -valves; and consists of a hollow valve, through which the steam passes to the cylinder of the engine by means of the ordinary steam-ports.
This valve slides upon the valve-seats of the steam-chest, as is` usual with such valves, and has at its top an opening for the passage of steam, and a seat upon which a packing-ring rides. This packing-ring lits inside of a cylinder, and is held to its placeby a follower and springor its equivalent.
In the drawing, "Figure l is a side view of my improved balance slide -valve; Fig. 2, a longitudinal section thereof Fig. 3, a top view of the interior of the valve chest 5 Fig. 4, a detached view.
A represents the cover to the steam-chest. B is the hollow valve. (l is the valve-seat and chest-bottom. D is the case or sides of chest. E, Fig. 4, is the transparent cover to the opening in steam-chest. F is the cylinder in which the packingring a and follower b are held. e is a rigid cross-bar, througlnwhich a set-screw passes to hold and adjust the spring d. h is the valve-stem, and g the yoke, by which the valve is moved. y
For an engine-valve the inside diameter of the cylinder F is made one-third larger in area than the areas of bothreceiving-ports 7a k, to equalize the back pressure of steam from the cylinder when cut oft' by the lap of the valve or link motion.
Through the opening n steam is admitted, and by its pressure serves to expand the packin g-rin g a so as to fill the cylinder F and form a steam-joint, and also serves to force the rin g a down upon the seat C atthe top of the valve B. From thence the steam passes, as represented bythe arrows, through the opening t, which is equal in area to one ofthe receivingports 7', into the valve B; .and as the valve B is moved to the right 'or left one of the ports lo is opened, and the steam is admitted to the engine-cylinder, the ports lc la and k being in allrespects the same as are n'ow in use." Uonsequently, this valve and packing-ring lmay be attached toordinary steam -chests now in use.
The ribs ff serve as guides for the valve B, and slide against Vthe sides of the cylinder F.
This valve is applicable for a throttle-valve, or for any other purpose where a balancevalve is desirable. As a throttle -valve, the area of the cylinder F is made equal to the area of both ports or openings for the pas'-` sage of steam, as there is in this case no back pressure.
The packing-,ringe is drilled edgewise its entire width, and thenI cut open tangentially to the inside circle ot' the ring, the cut passing through the center of the hole, as shown in Fig. 4. Into this hole the pin a is fitted, and its head let in to the edge of the ring so as to cover the opening, and thus make a perfect steam-joint.
By the employment. of the pin a', entering the split in the ring a, the latter can be held in a iirm position, and produces a perfect and tight joint between the surface c of the valve and the top of the chest.
Having thus described my invention, I clairn- The hollow valve B with its ports j j, eX-
haust-cavity m, seat C, and ribs f f, in combination with the packing ring ,follower b, spring d, and cylinder F, substantially as and for the purpose speciiied.
`In testimony that I claim the foregoing I have hereunto set my hand this 12th ,day of March, 1873.
. JOSEPH H. STOMBS.
Witnesses:
F. (l. BRYAN, R. B. Balears.
US143193D Improvement in balanced valves Expired - Lifetime US143193A (en)

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