US208344A - Improvement in balanced steam-valves - Google Patents

Improvement in balanced steam-valves Download PDF

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US208344A
US208344A US208344DA US208344A US 208344 A US208344 A US 208344A US 208344D A US208344D A US 208344DA US 208344 A US208344 A US 208344A
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valve
stem
valves
improvement
balanced
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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
    • F16K39/00—Devices for relieving the pressure on the sealing faces
    • F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
    • F16K39/022—Devices for relieving the pressure on the sealing faces for lift valves using balancing surfaces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/785—With retarder or dashpot
    • Y10T137/7852—End of valve moves inside dashpot chamber
    • Y10T137/7853—Enlarged piston on end of valve stem

Definitions

  • WITNESSES INVENTOR: WM
  • N PETERS PHOTO-LITHDGRAPMER. vVASHHzGTON, a c,
  • My invention relates to valves for steamengines which are balanced by the pressure of the steam, and is particularlyintended for the throttle-valves, to render the working of them easier, so that they require to operate them only power adequate to overcome the friction of the parts.
  • the said invention is also adapted to exhaust and governor valves.
  • My invention consists in a valve-stem supported in a valve-chamber by a piston-head at each end of the stem, and carrying a valve midway of its length, which stem and valve are operated to open and close the valve by a screw-rod or other means.
  • Figure 1 is a vertical section of a valve and valve-chamber embodying my invention.
  • Fig. 2 is a sectional elevation of one piston-head, and
  • Fig. 3 is a plan of the valve-seat.
  • a is the valve'case, formed of two hollow cylinders united at their flanged ends by bolts b, which bolts 1) also secure the intermediate ring 0, forming the valve-seat.
  • the steam comes from the boiler by the pipe (I, and passes to the engine by pipe 0.
  • valve f is the valve-stem, extending through the valve-case a from end to end, and carrying about midway of its length the valve h, which, when closed, rests upon the valve-seat c.
  • the valve h consists of a metal disk around the stem f, and having a socket to fit upon aball, i, on the stem f; and k is a ring withasimilar socket, secured by screw-bolts to h, so that the Valve 71- is held by the ball 2', but may turn thereon.
  • valve-stem f is provided at its ends with piston-heads l and m, which fit into the said ends of the valve-chamber, so that the stem f is the piston of the heads land on.
  • the heads 1 and m are packed, as at a,
  • the screw-rod q is to be operated by a wheel or handle, 8, in any usual manner, and it is evident that the rod q might be the valvestem of a governor.
  • valve h If the valve h be open, as shown in the drawing, the steam comes in at d and passes out at e. Thereby the pressure is equal upon the heads I and m in opposite directions, and the valve and stem are balanced. When the valve h is closed upon its seat, the pressure will be in opposite directions upon the head land valve h. In either position of the valve the moving parts are balanced, and, whatever may be the weight of the same, the power required to operate the valve needs only to be sufficient to overcome friction.
  • valve-case a The ends of the valve-case a may have caps t u bolted upon them, as seen in the drawing.
  • valve-stem f having an upper piston-head, Z, a central valve, h, and a lower piston-head, m
  • valve-casin g a having an inlet-pipe, (1, above the valveseat '0, and an exit-pipe, 6, below the said valve-seat, substantially as and for the purpose described.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Lift Valve (AREA)

Description

J.- A. STEPHENS. Balanced Steam-Valve.
No,208,344 Patented S'ept. 24,1878.
Fig.
WITNESSES: INVENTOR: WM
6 $7M? BY ATTORNEYS. 1
N PETERS. PHOTO-LITHDGRAPMER. vVASHHzGTON, a c,
UNITED STATES PATENT OEEIoE.
J OHNA. STEPHENS, OF LECOMTE, LOUISIANA.
IMPROVEMENT IN BALANCED STEAM-VALVES.
Specification forming part of Letters Patent No. 208,344, dated September 24, 1878; application filed Y J nly 27, 1878.
To all whom it may concern:
Be it known that I, JOHN A. STEPHENS, of Lecomte, in the parish of Rapides and State of Louisiana, have invented a new and Improved Balanced Steam-Valve, of which the following is a specification:
My invention relates to valves for steamengines which are balanced by the pressure of the steam, and is particularlyintended for the throttle-valves, to render the working of them easier, so that they require to operate them only power suficient to overcome the friction of the parts.
The said invention is also adapted to exhaust and governor valves.
My invention consists in a valve-stem supported in a valve-chamber by a piston-head at each end of the stem, and carrying a valve midway of its length, which stem and valve are operated to open and close the valve by a screw-rod or other means.
In the drawing, Figure 1 is a vertical section of a valve and valve-chamber embodying my invention. Fig. 2 is a sectional elevation of one piston-head, and Fig. 3 is a plan of the valve-seat.
Similar letters of reference indicate correspondin g parts.
a is the valve'case, formed of two hollow cylinders united at their flanged ends by bolts b, which bolts 1) also secure the intermediate ring 0, forming the valve-seat. The steam comes from the boiler by the pipe (I, and passes to the engine by pipe 0.
f is the valve-stem, extending through the valve-case a from end to end, and carrying about midway of its length the valve h, which, when closed, rests upon the valve-seat c. The valve h consists of a metal disk around the stem f, and having a socket to fit upon aball, i, on the stem f; and k is a ring withasimilar socket, secured by screw-bolts to h, so that the Valve 71- is held by the ball 2', but may turn thereon.
The outer ends of the valvechamber above the pipe (I and below the pipe 6 are turned smooth, and the valve-stem f is provided at its ends with piston-heads l and m, which fit into the said ends of the valve-chamber, so that the stem f is the piston of the heads land on. The heads 1 and m are packed, as at a,
rod (1, which takes under the edge of the ring 1'. This connection permits the rod q to turn independently of the stem f, but moves the stem endwise.
The screw-rod q is to be operated by a wheel or handle, 8, in any usual manner, and it is evident that the rod q might be the valvestem of a governor.
If the valve h be open, as shown in the drawing, the steam comes in at d and passes out at e. Thereby the pressure is equal upon the heads I and m in opposite directions, and the valve and stem are balanced. When the valve h is closed upon its seat, the pressure will be in opposite directions upon the head land valve h. In either position of the valve the moving parts are balanced, and, whatever may be the weight of the same, the power required to operate the valve needs only to be sufficient to overcome friction.
The ends of the valve-case a may have caps t u bolted upon them, as seen in the drawing.
I do not limit myself to the details of construction set forth-that is, for instance, the connection of the valve and stem, the manner of operating the valve-stem, or the construction of the piston-heads. These may be varied without departing from my invention.
Having thus described my invention, I claim as new and desire to secure by Letters Patent The combination of the valve-stem f, having an upper piston-head, Z, a central valve, h, and a lower piston-head, m, with the valve-casin g a, having an inlet-pipe, (1, above the valveseat '0, and an exit-pipe, 6, below the said valve-seat, substantially as and for the purpose described.
JOHN ALEXANDE t STEPHENS. Witnesses:
J ULEs LAMERAUX, B. MAYER.
US208344D Improvement in balanced steam-valves Expired - Lifetime US208344A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2631001A (en) * 1949-08-20 1953-03-10 Taylor Instrument Co Flow diversion valve
US2788192A (en) * 1950-04-28 1957-04-09 Shell Dev Fluid flow and pressure control valve
US2829664A (en) * 1952-09-04 1958-04-08 Shell Dev Fluid flow control valve with remote pressure control

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2631001A (en) * 1949-08-20 1953-03-10 Taylor Instrument Co Flow diversion valve
US2788192A (en) * 1950-04-28 1957-04-09 Shell Dev Fluid flow and pressure control valve
US2829664A (en) * 1952-09-04 1958-04-08 Shell Dev Fluid flow control valve with remote pressure control

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