US3446233A - Valves for centrifugal pumps - Google Patents

Valves for centrifugal pumps Download PDF

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Publication number
US3446233A
US3446233A US594560A US3446233DA US3446233A US 3446233 A US3446233 A US 3446233A US 594560 A US594560 A US 594560A US 3446233D A US3446233D A US 3446233DA US 3446233 A US3446233 A US 3446233A
Authority
US
United States
Prior art keywords
valve
valve body
sealing
pipe
inlet
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
US594560A
Other languages
English (en)
Inventor
Wilhelm Hans Herold
Gustav Ernst Rubi
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.)
Werner and Pfleiderer GmbH
Original Assignee
Werner and Pfleiderer GmbH
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 Werner and Pfleiderer GmbH filed Critical Werner and Pfleiderer GmbH
Application granted granted Critical
Publication of US3446233A publication Critical patent/US3446233A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F04D15/0011—Control, e.g. regulation, of pumps, pumping installations or systems by using valves by-pass valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • 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
    • F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
    • F16K15/026—Check valves with guided rigid valve members the valve being loaded by a spring the valve member being a movable body around which the medium flows when the valve is open
    • 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
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2559—Self-controlled branched flow systems
    • Y10T137/265—Plural outflows
    • Y10T137/2668—Alternately or successively substituted outflow
    • Y10T137/2688—Flow rate responsive
    • Y10T137/269—Flow sensing turbine
    • 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]
    • Y10T137/7866—Plural seating
    • Y10T137/7867—Sequential
    • 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
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86509—Sequentially progressive opening or closing of plural ports
    • Y10T137/86517—With subsequent closing of first port
    • 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
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87378—Second valve assembly carried by first valve head
    • Y10T137/87394—Carried valve is direct response valve [e.g., check valve, etc.]
    • 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
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87539—Having guide or restrictor

Definitions

  • This invention relates to a free-running valve for ceutrifugal pumps comprising a valve body which is arranged on the pressure side and regulates the flow in a pipe for the discharge of a minimum quantity of fluid, and is adapted to be operable in dependence on a pre-determined pressure.
  • centrifugal pumps which are intended to be permanently driven even at minimum load, it is necessary to make provisions to ensure that in the event of idling, damage to the pump and the devices appertaining thereto is avoided. This applies particularly to power plants, and to installations in which heated fluids are to be delivered. In the latter case diiiiculties arise in practice, for example when hot water pumps are to be driven at low load and, through evaporation of the pump contacts, the delivery falls below a Iixed minimum level.
  • centrifugal pumps which have valve arrangements in which a so-called free-running or by-pass non-return valve is provided.
  • the latter is actuated by the stream of iiuid delivered by the centrifugal pump and then controls a locking member which is arranged in a by-pass pipe connected into the circuit.
  • the invention has as its object to avoid the disadvantages and imperfections of the known plants and provide a centrifugal pump having a free-running valve, in which a reliable control of the quantity of uid to be discharged is always ensured when the stream of uid delivered to the pressure pipe falls below a predetermined quantity, Without the use of additional intermediate members.
  • valve body movable inside a housing has at least one sealing surface which exerts a direct action on the pipe for discharge of a minimum quantity of iiuid and opens or closes this pipe according to the position of the valve body.
  • additional connecting members or locking members may be dispensed with, with resultant simple valve design and the reliable maintenance-free manner of operation.
  • the invention also makes it possible to design the sealing surface, so that hydraulic jolts are reliably avoided even if the valve is closed rapidly. Accordingly the invention provides that the sealing surface is constituted by several sealing sections arranged one behind the other, and separated from one another by intermediate recesses. The height of the individual sections of the sealing surface of the valve body and the height of the intermediate recesses are advantageously in the same order of magnitude.
  • the measures according to the invention bring about a stage throttling, which moreover ensures that jet wear and noises occurring during operation are reduced to a minimum.
  • the number of individual surface sections can be fixed and their dimensions and those of the recesses modified in order to adapt to the particular operating conditions or pump size.
  • the counter-surface in the housing or in a bushing inserted in the latter, which co-operates with the sealing face of the valve body, is according to a further proposal of the invention, stepped in the same -way as the face itself and accordingly has sealing sections and recesses.
  • the stroke of the valve body can be adapted to the height of the sealing sections and the recesses or to a greater height.
  • the invention provides that the valve body has at its end facing the inlet pipe a locking section which when the valve is closed, i.e. when the pipe for the discharge of a minimum quantity of liuid is open, partly blocks the inlet pipe, and that the locking section projecting into the inlet bore has a flow channel corresponding to the ow cross-section of the pipe for the discharge of a minimum quantity of uid, which channel is variable if necessary and is in communication with cross-bores.
  • the invention provides that the pipe for the discharge of a minimum quantity of uid and the flow channel in the locking section each open into a recess of the sealing face and of the corresponding counter-face in the housing, respectively, that is to say into the iirst recess in the direction of flow.
  • FIGURE 1 shows a valve with valve body, in sectional view in the closed position, with the pipe for the discharge of a minimum quantity of fluid open, this iigure being offset through in relation to FIGURE 2.
  • FIGURE 2 shows the valve of FIGURE 1, with valve body in the open position.
  • valve housing 1 connected to a centrifugal pump, not shown, accommodates a movable valve body 2.
  • valve stem 3 At the transition point from the valve stem 3 to the valve body 2, the latter widens out into a dish-shaped part and is provided with a sealing seating surface 6, which bears against a corresponding seating surface 7 in the bottom part of the housing 1, when the valve body 2 reaches the closed position shown in FIGURE l, so that the flow through the pressure pipe 8-shown in dash-dot ⁇ lines-is shut off.
  • the closing position is obtained by a coil spring 9, which is provided in a bore 9 in the valve body 2, bears against a bolt 10 and passes round an inwardly shouldered bolt extension 10. This extension can be utilised as stroke-limiting means for the valve body 2.
  • the bolt 10 is retained by means of a cross-head 11 inserted in the upper part of the housing 1 and kept in position by means of a spring ring 11 or the like.
  • the sealing and guide face 5 passes over at the free end of the stem 3 of the valve member 3 into a sealing section 12, the diameter of which corresponds to an inlet bore 13 located in the bottom of the housing 1 and which projects into the latter when the valve is closed, as shown in FIGURE 1.
  • the inlet bore 13 is in direct communication with the inlet pipe 14, shown in dash-dot lines, which is supplied by a pump not shown.
  • valve body 2 When the delivery or delivery pressure falls below a predetermined minimum value, the valve body 2 is brought by the coil spring into the closed position as shown in FIGURE 1, the sealing surfaces 20 on the valve stem being displaced in the axial direction with respect to the sealing sections on the bushing 4, so that a channel 22 yfollowing a spiral course is formed, which comes into communication with cross-bores 23 in the housing, which are shut off in the open position of the valve body.
  • a pipe 24 for the discharge of a minimum quantity of uid provided in the housing 1 is connected to the crossbores 23, and the ow of a quantity of fluid delivered by the pump proceeds, in the closed position of the valve body 2, via the channel 22.
  • the free end of the stem 3 of the valve body 2 designed as locking section 12 engages in the inlet bore 13 in the housing 1, a vertical flow channel 25 in communication with one or more cross-bores 26 is necessary in this locking section, the said cross-bores opening into the channel 22.
  • cross-bores 23 and the vertical connecting channels 16 between the annular chambers 15 and 17 should not intersect, they are arranged in vertical planes which are staggered with respect to one another.
  • a valve construction comprising a valve body, a valve chamber in said body, a fluid inlet passage in said body leading to said chamber, a fluid outlet passage in said body leading from said chamber, a bypass passage in said body leading to said chamber, a first valve seat in said chamber, a second valve seat in said chamber, a pressure responsive movable valve element in said chamber, a first seating surface on said element adapted to co-operate with said rst seat to control uid cornmunication between said inlet and said outlet and a second seating surface on said element comprising a series of sealing sections adapted to co-operate with the second seat to control uid communication between the inlet passage and the bypass passage so that the bypass passage communicates with the inlet passage when the iirst seating surface is in seating contact with the rst seat and the outlet passage communicates with the inlet passage when the second seating surface is in seating contact with the second seat.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)
  • Lift Valve (AREA)
  • Safety Valves (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US594560A 1965-11-25 1966-11-15 Valves for centrifugal pumps Expired - Lifetime US3446233A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW0040372 1965-11-25

Publications (1)

Publication Number Publication Date
US3446233A true US3446233A (en) 1969-05-27

Family

ID=7602440

Family Applications (1)

Application Number Title Priority Date Filing Date
US594560A Expired - Lifetime US3446233A (en) 1965-11-25 1966-11-15 Valves for centrifugal pumps

Country Status (7)

Country Link
US (1) US3446233A (es)
BE (1) BE689300A (es)
DE (1) DE1528892B1 (es)
ES (1) ES333746A1 (es)
FR (1) FR1501481A (es)
GB (1) GB1170078A (es)
SE (1) SE331037B (es)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3610268A (en) * 1970-01-07 1971-10-05 Reda Pump Co Liquid check valve with controlled gas vent
US3685533A (en) * 1971-04-26 1972-08-22 Joseph L Krechel Unloader valve assembly
DE2608791A1 (de) * 1975-03-03 1976-10-14 Yarway Corp Modulierende stroemungssteuerventilanordnung
US20060130901A1 (en) * 2004-10-08 2006-06-22 Jansen's Aircraft Systems Controls, Inc. Relief valve
US20160097460A1 (en) * 2014-10-07 2016-04-07 Tescom Corporation 3-way inline air operated valve
WO2021008899A1 (de) * 2019-07-12 2021-01-21 KSB SE & Co. KGaA Ventil
WO2021008903A1 (de) * 2019-07-12 2021-01-21 KSB SE & Co. KGaA Armaturanordnung
US11000863B2 (en) * 2019-03-26 2021-05-11 Pentair Flow Technologies, Llc Push valve assembly and method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4119496A1 (de) * 1991-06-13 1992-12-17 Drago Dipl Ing Kober Freilauf-rueckschlagventil, insbesondere fuer fluessiggastanker
IT1265033B1 (it) * 1993-05-28 1996-10-28 Ausimont Spa Polivinilidenfluoruro ad elevate prestazioni meccaniche ed elevata stabilita' termochimica, e relativo processo di preparazione
GB2447627B (en) * 2007-03-20 2011-05-25 Ford Global Tech Llc A check valve for a vacuum pump

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2440590A (en) * 1938-01-21 1948-04-27 Kegresse Adolphe Pressure selector and corrector for bound-up automatic hydraulic transmissions
US2571007A (en) * 1947-07-31 1951-10-09 United Eng Foundry Co Relief valve
DE908814C (de) * 1943-06-24 1954-04-08 Hans Thoma Dr Ing Drosselvorrichtung fuer hydraulische Getriebe
US2958501A (en) * 1957-12-26 1960-11-01 Banstrom Ind Inc Automatic control mechanism
US3068882A (en) * 1958-07-05 1962-12-18 Odendahl Wilhelm Valve construction

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR849319A (fr) * 1938-02-02 1939-11-21 Sulzer Ag Organe de retenue disposé du côté refoulement de turbo-pompes, en particulier de pompes alimentaires de chaudières
CH331933A (de) * 1954-08-28 1958-08-15 Koninkl Maschf Gebr Stork & Co Rückschlagventil für eine Flüssigkeitspumpe
AT220901B (de) * 1959-06-23 1962-04-25 Modranske Strojirny Ckd Narodn Rückschlagventil mit automatischer Überströmung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2440590A (en) * 1938-01-21 1948-04-27 Kegresse Adolphe Pressure selector and corrector for bound-up automatic hydraulic transmissions
DE908814C (de) * 1943-06-24 1954-04-08 Hans Thoma Dr Ing Drosselvorrichtung fuer hydraulische Getriebe
US2571007A (en) * 1947-07-31 1951-10-09 United Eng Foundry Co Relief valve
US2958501A (en) * 1957-12-26 1960-11-01 Banstrom Ind Inc Automatic control mechanism
US3068882A (en) * 1958-07-05 1962-12-18 Odendahl Wilhelm Valve construction

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3610268A (en) * 1970-01-07 1971-10-05 Reda Pump Co Liquid check valve with controlled gas vent
US3685533A (en) * 1971-04-26 1972-08-22 Joseph L Krechel Unloader valve assembly
DE2608791A1 (de) * 1975-03-03 1976-10-14 Yarway Corp Modulierende stroemungssteuerventilanordnung
US20060130901A1 (en) * 2004-10-08 2006-06-22 Jansen's Aircraft Systems Controls, Inc. Relief valve
US7469712B2 (en) * 2004-10-08 2008-12-30 Jansen's Aircraft Systems Controls, Inc. Relief valve
US20160097460A1 (en) * 2014-10-07 2016-04-07 Tescom Corporation 3-way inline air operated valve
US9599237B2 (en) * 2014-10-07 2017-03-21 Tescom Corporation 3-way inline air operated valve
US11000863B2 (en) * 2019-03-26 2021-05-11 Pentair Flow Technologies, Llc Push valve assembly and method
WO2021008899A1 (de) * 2019-07-12 2021-01-21 KSB SE & Co. KGaA Ventil
WO2021008903A1 (de) * 2019-07-12 2021-01-21 KSB SE & Co. KGaA Armaturanordnung
CN114072608A (zh) * 2019-07-12 2022-02-18 Ksb股份有限公司 管接头装置

Also Published As

Publication number Publication date
GB1170078A (en) 1969-11-12
SE331037B (es) 1970-12-07
ES333746A1 (es) 1967-11-01
FR1501481A (fr) 1967-11-10
BE689300A (es) 1967-04-14
DE1528892B1 (de) 1972-04-27

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