US156371A - Improvement in relief-valves for steam fire-engines - Google Patents

Improvement in relief-valves for steam fire-engines Download PDF

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US156371A
US156371A US156371DA US156371A US 156371 A US156371 A US 156371A US 156371D A US156371D A US 156371DA US 156371 A US156371 A US 156371A
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Prior art keywords
valve
pressure
cylinder
steam
water
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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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/168—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side combined with manually-controlled valves, e.g. a valve combined with a safety valve
    • 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
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/06—Check valves with guided rigid valve members with guided stems
    • F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
    • 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
    • F16K15/00—Check valves
    • F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
    • F16K15/182—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism
    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • 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]
    • Y10T137/7876—With external means for opposing bias
    • 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]
    • Y10T137/7904—Reciprocating valves
    • Y10T137/7922—Spring biased
    • Y10T137/7923—With means to protect spring from fluid
    • 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]
    • Y10T137/7904—Reciprocating valves
    • Y10T137/7922—Spring biased
    • Y10T137/7929—Spring coaxial with valve
    • Y10T137/7932—Valve stem extends through fixed spring abutment

Definitions

  • This valve is employed to prevent the accu- "n mulation of pressure and the bursting of the hose when the discharge of the water is accimovement of which endwise in a cylinderv opens the discharge water-way into the suction of the pump.
  • This plunger-valve is acted upon by a yielding lpressure and resistance that is proportioned to the pressure at which the water is to be discharged from the engine, so that when that pressure is exceeded the valve-plum ger opens and allows the water to l escape.
  • Figure l is a vertical sectionof my improved valve.
  • Fig. 2 is a sectional plan of the saine, at the line :c a2,- and Fig. 3 is a vertical section, representing some modifications in the yielding resistance to the valve-piston.
  • the screw-coupling a is adapted to the opening made in the discharge water-way of the pump, or to a pipe leading thereto; and at b is a seat for the valve-piston c, that iits within the cylinder d, and. is made to move steam or water tight therein by the elastic packing e, Fig. 1, or the double eupleather packings e', Fig. 3.
  • the seat b In the portion of this cylinder d above the seat b are slots or openin gs, through which the water can freely discharge into the waterway g, that isannular, and made as a case, f, around the cylinder d.
  • This case f is provided h, and it can be turned around so as to allow the pipe to pass away in the most convenient direction; and this case f is clamped in place by the cylinder 2, screwed upon the cylinder d.
  • the piston-valve c is to be pressed to its seat by a power sufficient to resist the designated pressure of the water, and when that pressure is exceeded the valve opens, and allows the water to iiow back into the induction-ways through the way g'and the pipe or connection h.
  • the pressure that tends to hold the valve c to its seat is, preferably, the steam-pressure from the boiler; and for this purpose the steam is allowed to fill the cylinder l, and act upon the side of the valve-piston opposite to that against which the water-pressure acts 5 and this cylinder l has a cap, m, and packing-gland u around the piston-valve stem or rod, and a screw-wheel, r, serves for opening the valve by hand, whenever desired.
  • the steam or steam-pressure is admitted by the cock or valve s into the cylinder l, and the area of the piston against which it acts, in comparison with the area of the valve, is such that, with a given pressure in the cylinder l, the valve will be lifted against that steampressure by any excess of water-pressure over the xed standard.
  • the blow-off cock t serves the purpose of allowing water of condensation to be discharged; when desired, and also for lessening the press- 'ure of the steam acting upon the valve; and hence, by the proper adjustment of the valves c and t, the pressure acting upon the piston c can be regulated, as desired.
  • a gage is usually applied to indicate the pressure in the discharge water-way, and a gage should be applied to indicate the pressure in the cylinder l.
  • Fig. 3 I have shown a spring and an adjusting screw-cap, m, applied to act as a resistance to the plunger, the annular case f, slotted cylinder d, and valve and seat being made as before described.
  • the spring and steam pressure might be employed together, one in aid of the other7 if desired.
  • valve-stem passing through a packing-gland, u, and having the screw and hand wheel 1', in combination with the plunger-valve c, slotted cylinder d, valve-seat b, inlet and discharge pipes a h, and cocks s t, substantially as set forth, for operating the plunger-v cock t, for regulating the pressure acting in said cylinder to press the plunger-Valve to- Ward its seat, as and for the purposes specified. Signed by me 'this 5th day of August, A. D. 1874.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)
  • Lift Valve (AREA)

Description

.with a discharge-pipe,
UNITED STATES` l PATENT CEEIOE.
GILBERT J. OEE, or NEw YORK, N. Y.
IMPRovEMENT IN REUEF-VALVES FoR -s-TEAM FIRE-ENGINES.
Specification forming part of Letters Patent No. 1.569371, dated October 27, 1874; application led August s, 1874.
To all whom it may concern:
Be it known that I, GILBERT J. ORE, of the city and State of New York, have invented an Improvement in Relief-Yalves for Steam Fire- Engines, of which the following is a specification:
This valve is employed to prevent the accu- "n mulation of pressure and the bursting of the hose when the discharge of the water is accimovement of which endwise in a cylinderv opens the discharge water-way into the suction of the pump. This plunger-valve is acted upon by a yielding lpressure and resistance that is proportioned to the pressure at which the water is to be discharged from the engine, so that when that pressure is exceeded the valve-plum ger opens and allows the water to l escape.
In the drawing, Figure l is a vertical sectionof my improved valve. Fig. 2 is a sectional plan of the saine, at the line :c a2,- and Fig. 3 is a vertical section, representing some modifications in the yielding resistance to the valve-piston. L
The screw-coupling a is adapted to the opening made in the discharge water-way of the pump, or to a pipe leading thereto; and at b is a seat for the valve-piston c, that iits within the cylinder d, and. is made to move steam or water tight therein by the elastic packing e, Fig. 1, or the double eupleather packings e', Fig. 3. In the portion of this cylinder d above the seat b are slots or openin gs, through which the water can freely discharge into the waterway g, that isannular, and made as a case, f, around the cylinder d. This case f is provided h, and it can be turned around so as to allow the pipe to pass away in the most convenient direction; and this case f is clamped in place by the cylinder 2, screwed upon the cylinder d.
The piston-valve c is to be pressed to its seat by a power sufficient to resist the designated pressure of the water, and when that pressure is exceeded the valve opens, and allows the water to iiow back into the induction-ways through the way g'and the pipe or connection h.
The pressure that tends to hold the valve c to its seat is, preferably, the steam-pressure from the boiler; and for this purpose the steam is allowed to fill the cylinder l, and act upon the side of the valve-piston opposite to that against which the water-pressure acts 5 and this cylinder l has a cap, m, and packing-gland u around the piston-valve stem or rod, and a screw-wheel, r, serves for opening the valve by hand, whenever desired.
The steam or steam-pressure is admitted by the cock or valve s into the cylinder l, and the area of the piston against which it acts, in comparison with the area of the valve, is such that, with a given pressure in the cylinder l, the valve will be lifted against that steampressure by any excess of water-pressure over the xed standard. y The blow-off cock t serves the purpose of allowing water of condensation to be discharged; when desired, and also for lessening the press- 'ure of the steam acting upon the valve; and hence, by the proper adjustment of the valves c and t, the pressure acting upon the piston c can be regulated, as desired.
A gage is usually applied to indicate the pressure in the discharge water-way, anda gage should be applied to indicate the pressure in the cylinder l.
It will be apparent that the relative areas of the piston-valve surfaces, against which the water and steam pressure act, respectively, may be varied by making the valve-seat, and the valve resting thereon, smaller than the other end, against which the steam-pressure acts.
In Fig. 3 I have shown a spring and an adjusting screw-cap, m, applied to act as a resistance to the plunger, the annular case f, slotted cylinder d, and valve and seat being made as before described.
The spring and steam pressure might be employed together, one in aid of the other7 if desired.
I claim as my invention- 1. The annular case f around the slotted cylinder d, provided with the p-pe or connection h, and secured in place by the cylinder l, in
combination with the plunger-valve c and seatV b, substantially as set forth.
2. The screw-cap m and packing-gland u at the end of the cylinder l, in combination with the plunger-valve c, slotted cylinder d, and annular case f, substantially as and for the purposes set forth.
3. The valve-stem passing through a packing-gland, u, and having the screw and hand wheel 1', in combination with the plunger-valve c, slotted cylinder d, valve-seat b, inlet and discharge pipes a h, and cocks s t, substantially as set forth, for operating the plunger-v cock t, for regulating the pressure acting in said cylinder to press the plunger-Valve to- Ward its seat, as and for the purposes specified. Signed by me 'this 5th day of August, A. D. 1874.
' GILBERT J. ORB.
Witnesses:
GEO. T. PINCKNEY, CHAs. H. SMITH.
US156371D Improvement in relief-valves for steam fire-engines Expired - Lifetime US156371A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655936A (en) * 1950-02-21 1953-10-20 Westinghouse Electric Corp Valve assembly
US2874718A (en) * 1954-09-23 1959-02-24 Bendix Aviat Corp Hydraulic fuel shut-off valve
US4766924A (en) * 1986-12-08 1988-08-30 The Lee Company Pressure relief valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655936A (en) * 1950-02-21 1953-10-20 Westinghouse Electric Corp Valve assembly
US2874718A (en) * 1954-09-23 1959-02-24 Bendix Aviat Corp Hydraulic fuel shut-off valve
US4766924A (en) * 1986-12-08 1988-08-30 The Lee Company Pressure relief valve

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