US2757616A - Priming valve for a centrifugal pump - Google Patents

Priming valve for a centrifugal pump Download PDF

Info

Publication number
US2757616A
US2757616A US332446A US33244653A US2757616A US 2757616 A US2757616 A US 2757616A US 332446 A US332446 A US 332446A US 33244653 A US33244653 A US 33244653A US 2757616 A US2757616 A US 2757616A
Authority
US
United States
Prior art keywords
valve
pump
priming
centrifugal pump
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US332446A
Inventor
Robert A Hill
David F Thomas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Waterous Co
Original Assignee
Waterous Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Waterous Co filed Critical Waterous Co
Priority to US332446A priority Critical patent/US2757616A/en
Application granted granted Critical
Publication of US2757616A publication Critical patent/US2757616A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/04—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock
    • F04D9/041—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock the priming pump having evacuating action
    • F04D9/042—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock the priming pump having evacuating action and means for rendering its in operative
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/04—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock
    • F04D9/044—Means for rendering the priming pump inoperative
    • F04D9/045—Means for rendering the priming pump inoperative the means being liquid level sensors
    • F04D9/046—Means for rendering the priming pump inoperative the means being liquid level sensors the means being floats
    • 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
    • F16K15/04—Check valves with guided rigid valve members shaped as balls
    • F16K15/042—Check valves with guided rigid valve members shaped as balls with a plurality of balls
    • 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
    • F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
    • F16K24/04—Devices, e.g. valves, for venting or aerating enclosures for venting only
    • F16K24/042—Devices, e.g. valves, for venting or aerating enclosures for venting only actuated by a float
    • 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
    • F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
    • F16K24/04—Devices, e.g. valves, for venting or aerating enclosures for venting only
    • F16K24/042—Devices, e.g. valves, for venting or aerating enclosures for venting only actuated by a float
    • F16K24/044—Devices, e.g. valves, for venting or aerating enclosures for venting only actuated by a float the float being rigidly connected to the valve element, the assembly of float and valve element following a substantially translational movement when actuated, e.g. also for actuating a pilot valve
    • F16K24/046—Devices, e.g. valves, for venting or aerating enclosures for venting only actuated by a float the float being rigidly connected to the valve element, the assembly of float and valve element following a substantially translational movement when actuated, e.g. also for actuating a pilot valve the assembly of float and valve element being a single spherical element
    • 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]
    • Y10T137/7838—Plural
    • 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]
    • Y10T137/7838—Plural
    • Y10T137/7842—Diverse types

Definitions

  • the priming pump may be connected to the discharge manifold, the volute, or at any other suitable location, such as to the impeller intake chamber.
  • the priming pump 21 is placed into operation to evacuate air from the discharge manifold and accordingly from the volutes of the pump. This acts to draw Water in through one or both of the inlets 10 and 11 until all or most of the air has been evacuated from the centrifugal pump.
  • the valve 32 remains in the position shown in Figure 2 of the drawings, while the float ball drops onto the base of the cup-shaped portion 44 of the valve.
  • the priming pump 21 When the priming pump has evacuated the air from the centrifugal pump A, the priming pump 21 is usually disconnected from the source of power and the main pump is started into operation. A short interval usually elapses between the time the priming pump 21 is discontinued from the power source and the time the main centrifugal pump is connected thereto and brought up to pumping speed. During this time water normally tends to drain back through the pump inlet 10 or 11, or both, thus partially draining the priming water from the main pump.
  • the float 43 raises against its seat 42 and tends to prevent water from flowing upwardly through this valve.
  • the float 43 prevents air from being drawn through the priming pump and into the centrifugal pump.
  • the float valve has a tendency to keep the priming liquid in the centrifugal pump during the interval when neither pump is functioning.
  • connection 24 is connected to the volute of the pump. Pressure from the volute passes through the connection 24 acting to close the valve 32 against its seat, preventing escape of liquid until the pressure drops.
  • connection 24 When the connection 24 is connected to the pump intake, parallel connections may extend to high points of all impeller inlet chambers if the pump is of the impeller type. Pressure from the second stage impeller inlet acts to close the valve 32 in the manner described. Obviously, when a plurality of connections are used in parallel check valves must be incorporated in these lines to prevent pressure from one line flowing in a reverse direction toward the centrifugal pump in the parallel line or lines.
  • valve B If the impellers are in parallel, the valve B If the impellers are arranged in series, the valve B
  • the float ball 43 When the inlet chamber is subject to partial vacuum, the float ball 43 is held in sealing position against the seat 42 during normal operation of the pump, or until it loses its prime. Under certain conditions of operation, however, the centrifugal pump is supplied from a hydrant or other water supply of water under pressure. In such an instance, the priming pump need not be used, but water could leak out through the priming pump if no means were provided to prevent such action. In such a case the hydrant pressure entering the valve B will force the valve 32 against its seat 46, preventing leakage as long as the pressure within the inlet exceeds atmospheric pressure. Subsequently, the float valve 43 rises and seals the connection when a subatmospheric pressure is attached in the pump inlet, or impeller inlet chamber.
  • a priming valve in combination with a centrifugal pump and a priming pump, the valve including a valve chamber, means connecting the lower end of said chamber to the priming pump, means connecting the upper extremity of the chamber to the interior of the centrifugal pump, a pressure valve interposed between the ends of the valve chamber for closing the lower end of said chamber when subjected to suflicient centrifugal pump pres sure, resilient means normally holding said pressure valve open, and a float valve above the level of said pressure valve and designed to close the inlet at the top of the valve chamber leading to said centrifugal pump.
  • valve is provided with a cup-shaped upper extremity designed to accommodate the float valve, and said cup shaped valve end having threaded apertures therethrough.
  • a priming valve system comprising a main pump, a priming pump having inlet means, a valve chamber having a pair of openings, a float element for closing one of said openings, said one opening having connection with the interior of the main pump, a pressure valve element for closing the other of said openings, said other opening having connection with said inlet means, and means for yieldingly biasing said pressure element into spaced relation with said other opening, whereby a predetermined fluid pressure will overcome the effect of said biasing means to close said pressure element.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

7, 1956 R. A. HILL ETAL 2,757,616
PRIMING VALVE FOR ,A CENTRIFUGAL PUMP Filed Jan. 21, 1953 5 E \\l//m ll 1 0 gm INVENTOR.
Robe/"f 14. #1?! BY David F Thomas 0% m'DJnn ATTORNEY be proportioned so as to be limited in upward movement by engagement against the offset 39 of the valve housing; and the cotter pin 53 and washer 54 eliminated.
The priming pump may be connected to the discharge manifold, the volute, or at any other suitable location, such as to the impeller intake chamber. When it is desired to use the centrifugal pump A and if no priming water is found in the system, the priming pump 21 is placed into operation to evacuate air from the discharge manifold and accordingly from the volutes of the pump. This acts to draw Water in through one or both of the inlets 10 and 11 until all or most of the air has been evacuated from the centrifugal pump. During this process the valve 32 remains in the position shown in Figure 2 of the drawings, while the float ball drops onto the base of the cup-shaped portion 44 of the valve.
When the centrifugal pump is filled with water, water is drawn through the connection 24 and into the top of the valve 23. This downward force of water prevents the float valve 43 from seating and the water continues through the valve housing and through the priming connection 22 and into the priming pump 21, the water being expelled through the discharge of this priming pump 21 to atmosphere.
When the priming pump has evacuated the air from the centrifugal pump A, the priming pump 21 is usually disconnected from the source of power and the main pump is started into operation. A short interval usually elapses between the time the priming pump 21 is discontinued from the power source and the time the main centrifugal pump is connected thereto and brought up to pumping speed. During this time water normally tends to drain back through the pump inlet 10 or 11, or both, thus partially draining the priming water from the main pump.
As soon as the priming operation is completed and the priming pump 21 is turned off, the float 43 raises against its seat 42 and tends to prevent water from flowing upwardly through this valve. When thus engaged the float 43 prevents air from being drawn through the priming pump and into the centrifugal pump. Thus the float valve has a tendency to keep the priming liquid in the centrifugal pump during the interval when neither pump is functioning.
When the centrifugal pump A is started into operation in a system in which the connection 24 is connected to the discharge manifold 13, water pressure is delivered to the discharge manifold 13 accordingly to the connection 24 connecting the discharge manifold with the valve B. This water under pressure tends to flow through the valve 13 and drive the gear pump. This causes a pressure to be built up in the priming system. As the pressure on opposite sides of the valve 32 is then unbalanced because of the valve stem 31 extending through the valve casing, the valve 32 remains in closed position, preventing the escape of liquid until the main pump is cut off or loses its prime.
A similar operation takes place when the connection 24 is connected to the volute of the pump. Pressure from the volute passes through the connection 24 acting to close the valve 32 against its seat, preventing escape of liquid until the pressure drops.
When the connection 24 is connected to the pump intake, parallel connections may extend to high points of all impeller inlet chambers if the pump is of the impeller type. pressure from the second stage impeller inlet acts to close the valve 32 in the manner described. Obviously, when a plurality of connections are used in parallel check valves must be incorporated in these lines to prevent pressure from one line flowing in a reverse direction toward the centrifugal pump in the parallel line or lines.
In the event the impellers are in parallel, the valve B If the impellers are arranged in series, the
xii
still serves a useful purpose. When the inlet chamber is subject to partial vacuum, the float ball 43 is held in sealing position against the seat 42 during normal operation of the pump, or until it loses its prime. Under certain conditions of operation, however, the centrifugal pump is supplied from a hydrant or other water supply of water under pressure. In such an instance, the priming pump need not be used, but water could leak out through the priming pump if no means were provided to prevent such action. In such a case the hydrant pressure entering the valve B will force the valve 32 against its seat 46, preventing leakage as long as the pressure within the inlet exceeds atmospheric pressure. Subsequently, the float valve 43 rises and seals the connection when a subatmospheric pressure is attached in the pump inlet, or impeller inlet chamber.
In accordance with the patent statutes, we have described the principles of construction and operation of our priming valve for a centrifugal pump, and while it has been endeavored to set forth the best embodiments thereof, it is desired to have it understood that obvious changes may be made within the scope of the following claims without departing from the spirit of the invention.
We claim:
1. A priming valve in combination with a centrifugal pump and a priming pump, the valve including a valve chamber, means connecting the lower end of said chamber to the priming pump, means connecting the upper extremity of the chamber to the interior of the centrifugal pump, a pressure valve interposed between the ends of the valve chamber for closing the lower end of said chamber when subjected to suflicient centrifugal pump pres sure, resilient means normally holding said pressure valve open, and a float valve above the level of said pressure valve and designed to close the inlet at the top of the valve chamber leading to said centrifugal pump.
2. The structure described in claim 1 and in which the pressure valve is provided with a cup-shaped upper extremity designed to accommodate the float valve.
3. The structure described in claim 1 and in which the float valve comprises a body of light weight material oi lower specific gravity than water and a liquid-proof covering therefor.
4. The structure described in claim 1 and in which the valve is provided with a cup-shaped upper extremity designed to accommodate the float valve, and said cup shaped valve end having threaded apertures therethrough.
5. A priming valve system comprising a main pump, a priming pump having inlet means, a valve chamber having a pair of openings, a float element for closing one of said openings, said one opening having connection with the interior of the main pump, a pressure valve element for closing the other of said openings, said other opening having connection with said inlet means, and means for yieldingly biasing said pressure element into spaced relation with said other opening, whereby a predetermined fluid pressure will overcome the effect of said biasing means to close said pressure element.
References Cited in the file of this patent UNITED STATES PATENTS 1,573,931 Goyne Feb. 23, 1926 1,665,460 Hollander Apr. 10, 1928 1,944,249 Lencke Ian. 23, 1934 1,995,812 Noble Mar. 26, 1935 2,282,338 Moody -c May 12, 1942 2,322,910 Adney et al June 29, 1943 2,404,924 Sacchini July 30, 1946 2,462,605 Bridwell Sept. 21, 1953 FOREIGN PATENTS 348,860 Germany Jan. 14, 1935 517,677 Great Britain Feb. 6, 1940
US332446A 1953-01-21 1953-01-21 Priming valve for a centrifugal pump Expired - Lifetime US2757616A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US332446A US2757616A (en) 1953-01-21 1953-01-21 Priming valve for a centrifugal pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US332446A US2757616A (en) 1953-01-21 1953-01-21 Priming valve for a centrifugal pump

Publications (1)

Publication Number Publication Date
US2757616A true US2757616A (en) 1956-08-07

Family

ID=23298266

Family Applications (1)

Application Number Title Priority Date Filing Date
US332446A Expired - Lifetime US2757616A (en) 1953-01-21 1953-01-21 Priming valve for a centrifugal pump

Country Status (1)

Country Link
US (1) US2757616A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2881708A (en) * 1951-12-24 1959-04-14 Wernert Karl Regulable hydraulic apparatus
US3474735A (en) * 1967-05-24 1969-10-28 Samuel E Gilmore Air dumping control mechanism for self-priming pumps
US3861414A (en) * 1972-10-04 1975-01-21 Ii William Donald Peterson Bi-directional flow stop valve
US5957151A (en) * 1998-01-23 1999-09-28 Dalcourt; Rene Automatic pressure regulating valve
WO2015130620A3 (en) * 2014-02-28 2015-11-26 Flow Control Llc. Anti-airlock valve assembly
US10895328B2 (en) * 2018-07-30 2021-01-19 Danfoss Power Solutions Aps Hydraulic steering unit

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US157393A (en) * 1874-12-01 Improvement in machines for upsetting tires
DE348860C (en) * 1920-10-12 1922-02-18 Willy Koebe Automatic venting for centrifugal pumps
US1665460A (en) * 1927-07-16 1928-04-10 Byron Jackson Pump Mfg Co Priming means
US1944249A (en) * 1933-05-19 1934-01-23 John K Lencke Protective device for hose lines
US1995812A (en) * 1933-04-13 1935-03-26 Pennsylvania Pump & Compressor Pump priming means
GB517677A (en) * 1937-08-03 1940-02-06 William Charles Groeniger A new or improved combined check valve and vacuum relief valve
US2282338A (en) * 1940-04-17 1942-05-12 George E Moody Antisiphonic valve
US2322910A (en) * 1941-04-07 1943-06-29 American Marsh Pumps Inc Priming device for pumps
US2404924A (en) * 1943-01-29 1946-07-30 Marquette Metal Products Co Fluid control apparatus
US2462605A (en) * 1944-09-02 1949-02-22 Chalon E Bridwell Valve cage

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US157393A (en) * 1874-12-01 Improvement in machines for upsetting tires
DE348860C (en) * 1920-10-12 1922-02-18 Willy Koebe Automatic venting for centrifugal pumps
US1665460A (en) * 1927-07-16 1928-04-10 Byron Jackson Pump Mfg Co Priming means
US1995812A (en) * 1933-04-13 1935-03-26 Pennsylvania Pump & Compressor Pump priming means
US1944249A (en) * 1933-05-19 1934-01-23 John K Lencke Protective device for hose lines
GB517677A (en) * 1937-08-03 1940-02-06 William Charles Groeniger A new or improved combined check valve and vacuum relief valve
US2282338A (en) * 1940-04-17 1942-05-12 George E Moody Antisiphonic valve
US2322910A (en) * 1941-04-07 1943-06-29 American Marsh Pumps Inc Priming device for pumps
US2404924A (en) * 1943-01-29 1946-07-30 Marquette Metal Products Co Fluid control apparatus
US2462605A (en) * 1944-09-02 1949-02-22 Chalon E Bridwell Valve cage

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2881708A (en) * 1951-12-24 1959-04-14 Wernert Karl Regulable hydraulic apparatus
US3474735A (en) * 1967-05-24 1969-10-28 Samuel E Gilmore Air dumping control mechanism for self-priming pumps
US3861414A (en) * 1972-10-04 1975-01-21 Ii William Donald Peterson Bi-directional flow stop valve
US5957151A (en) * 1998-01-23 1999-09-28 Dalcourt; Rene Automatic pressure regulating valve
WO2015130620A3 (en) * 2014-02-28 2015-11-26 Flow Control Llc. Anti-airlock valve assembly
US10895328B2 (en) * 2018-07-30 2021-01-19 Danfoss Power Solutions Aps Hydraulic steering unit

Similar Documents

Publication Publication Date Title
US6409478B1 (en) Vacuum-assisted pump
US4067663A (en) Sewage pump priming system
US4524794A (en) Air release and anti-siphon valve
US2757616A (en) Priming valve for a centrifugal pump
US2812772A (en) Flow control device
US3591316A (en) Automatic centrifugal pump primer
US3434430A (en) Self-priming pump system with external actuating means
US2621596A (en) Pressure system
US1573931A (en) Priming system for centrifugal pumps
US2172097A (en) Air-volume control mechanism
US1971441A (en) Priming system for centrifugal pumps
US1910775A (en) Means for priming liquid pumps
US1890317A (en) Priming apparatus for pumps
US2033980A (en) Priming apparatus for centrifugal pumps
US2421237A (en) Air charger for jet pumps
US2732804A (en) Automatic pressure liquid supply system
KR0123963Y1 (en) Stop valve
US2660956A (en) Priming arrangement for centrifugal pumps
US3228343A (en) Self-priming pump
US3469528A (en) Self-priming impeller pump with flow demand control and selective primer and running circuits
US3062149A (en) Impeller pump pressure system and pump unit assembly therefor
US2675762A (en) Share
US2033981A (en) Priming apparatus for centrifugal pumps
US1960659A (en) Pumping apparatus
US2144613A (en) Priming system for centrifugal pumps