EP1922503A2 - Clapet anti-retour destine a une pompe a amorçage automatique - Google Patents

Clapet anti-retour destine a une pompe a amorçage automatique

Info

Publication number
EP1922503A2
EP1922503A2 EP06813361A EP06813361A EP1922503A2 EP 1922503 A2 EP1922503 A2 EP 1922503A2 EP 06813361 A EP06813361 A EP 06813361A EP 06813361 A EP06813361 A EP 06813361A EP 1922503 A2 EP1922503 A2 EP 1922503A2
Authority
EP
European Patent Office
Prior art keywords
hinge
check valve
pump
self
flapper
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.)
Withdrawn
Application number
EP06813361A
Other languages
German (de)
English (en)
Other versions
EP1922503A4 (fr
Inventor
Greg Paulin
James G. Shaw
James Harmon
James Northrup
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.)
Envirotech Pumpsystems Inc
Original Assignee
Envirotech Pumpsystems Inc
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
Priority claimed from US11/501,476 external-priority patent/US7641253B2/en
Application filed by Envirotech Pumpsystems Inc filed Critical Envirotech Pumpsystems Inc
Priority claimed from PCT/US2006/031199 external-priority patent/WO2007019560A2/fr
Publication of EP1922503A2 publication Critical patent/EP1922503A2/fr
Publication of EP1922503A4 publication Critical patent/EP1922503A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member

Definitions

  • This invention relates to self-priming centrifugal pumps which are used to process fluids that usually contain solids. Specifically, this invention relates to providing an improved check valve system for self-priming pumps that facilitates maintenance and repair of the check valve of the pump.
  • Self-priming centrifugal pumps are well- known and frequently used in industries where processing fluids with entrained solids is required.
  • Self-primer pumps also known as trash pumps, are characterized as having a casing which houses a suction chamber and a separation chamber divided by a wall or plenum.
  • An impeller positioned in a volute section of the pump receives fluid from the suction chamber and delivers it by centrifugal action into the separation chamber where it is eventually expelled through an outlet.
  • Self-primer pumps are further structured with a check valve that is positioned at or adjacent the inlet to the pump. In operation, as fluid enters through the inlet, the check valve remains open, allowing fluid to enter into the suction chamber of the pump.
  • the check valve When the pump stops, the check valve will seat against the inlet opening to prevent fluid from leaving the suction chamber of the pump. That is, if the check valve remains open or does not seat properly against the inlet, fluid is siphoned back out of the suction chamber until the siphoning action, or siphon leg, is broken. As a result, the fluid level in the suction chamber is very low making re-priming of the pump very difficult. It is desirable, therefore, to assure that fluid remains in the suction chamber.
  • a check valve of the flapper type is provided for use in a self-primer pump and is structured for attachment to the pump casing in a manner that facilitates servicing of the check valve.
  • the check valve of the present invention has attachment apparatus that are positioned external to the casing, and the flapper of the check valve is located through an opening of the casing in a manner that enables the servicing or replacement of the valve without dropping the flapper or the hardware into the interior of the pump.
  • the check valve of the present invention generally comprises a flapper valve most suitably made of elastomeric material and has a molded- in metal hinge.
  • a hinge pin end extends from either end of the metal hinge to provide means for attaching the flapper valve to the pump.
  • the flapper valve is positioned over the check valve inlet and is accessible through an access port for servicing.
  • the attachment apparatus otherwise referred to herein as
  • the attachment apparatus generally comprises an attachment member which provides structure for attachment of the flapper valve thereto, the attachment member being accessible from outside the pump.
  • the pump casing, or check valve housing is further structured with a supporting ledge which is positioned to retain and support the two hinge pin ends of the flapper valve so that the flapper valve cannot fall into the pump during servicing or replacement.
  • FIG. 1 is an exploded view of the check valve system of prior art self- primer pumps which are smaller in size;
  • FIG. 2 is a view in cross section of the assembled check valve system of the prior art shown in FIG. 1 ;
  • FIG. 3 is an exploded view of a check valve system of a prior art self- primer pump which is of a larger size;
  • FIG. 4 is a perspective view of a larger size self-primer pump illustrating the external placement of the check valve access port and the external attachment apparatus of the present invention
  • FIG. 5 is an exploded view of the check valve system of the present invention
  • FIG. 6 is a close up view of the structure for attaching the flapper valve to the pump.
  • FIG. 7 is a close-up view in partial cross section of the check valve system of the present invention illustrating the external positioning of the securement means.
  • FIGS. 1 and 2 illustrate, for comparative purposes, the structure of small prior art self-primer pumps that employ an elastomeric flapper valve 10 having an embedded steel ring and an elastomeric hinge 12 reinforced with embedded fabric.
  • the flapper valve 10 is positioned between the pump casing 14 and an inlet fitting 16 that connects to the pump casing 14 by a rear flange 18.
  • the rear flange 18 is structured with an axially-extending opening 20 that is sized to receive a hinge connector 22.
  • the hinge connector 22 is held within the rear flange 18 by a retaining pin 24 that fits through a threaded hole 26 formed through the rear flange 18 and engages a hole 28 in the hinge connector 22.
  • the hinge head 30 of the flapper valve 10 is positioned adjacent the hinge connector 22 and a hinge plate 34 is thereafter positioned against the hinge head 30 so that holes 36 formed in the hinge plate 34, hinge head 30 and hinge connector 22 are appropriately aligned to receive two securement bolts 38 therethrough.
  • the inlet fitting 16 is then secured to the pump casing 14. Servicing the flapper valve 10 in smaller pumps is relatively easy, as illustrated in FIGS. 1 and 2.
  • FIG. 3 illustrates a portion of the larger size self- primer pump in which conventional design and configuration make servicing the flapper valve very difficult.
  • FIG. 4 illustrates the overall construction of a larger size self-primer pump 40 having a casing 42, an inlet 44 and an outlet
  • FIG. 3 illustrates in an exploded view the assembly of the flapper valve 56 in larger prior art pumps.
  • the flapper valve 56 consists of an internal metal plate 58, having two outwardly extending pins 60, that is embedded in the elastomeric flapper 62.
  • Two pivot caps 64 which are structured to pivotally engage the pins 60 of the flapper valve 56, are secured by bolts 66 and washers 68 to respective holes 70 formed in the check valve body 72 of the pump.
  • FIG. 5 illustrates the check valve assembly of the present invention where, notably, all of the attachment hardware is located externally to the pump casing (e.g., check valve housing), thereby eliminating the possibility of dropping the hardware into the pump.
  • FIG. 4 further illustrates a larger size self-primer pump 40 which is structured with the check valve assembly of the present invention.
  • the check valve 80 comprises an elastomeric flapper 82 having a molded-in metal hinge 84. Two opposing hinge pin ends 86 extend laterally in opposite directions to each other from the hinge 84. While, a single pin may be positioned through the metal hinge 84 to provide the laterally extending pin ends 86, alternatively two separate pin ends 86 may be structured to extend from the hinge 84.
  • a hinge block 88 is inserted onto each hinge pin end 86 and the hinge block 88 is held in place on the pin end 86 by an end clip 90.
  • an elastomeric spacer 91 is positioned relative to each hinge block 88 to assure clamping of the flapper 82 in place.
  • the check valve housing 94 of the present invention is structured to provide support for external positioning of attachment apparatus 95 for attaching the flapper 82 to the check valve housing 94.
  • the check valve housing 94 is structured with an elongated access opening 96.
  • the attachment apparatus 95 of the invention includes an attachment member
  • a removable access opening cover 98 that is positionable over the access opening 96 to enclose the access opening 96.
  • the attachment apparatus further comprises bracket apparatus 99 connected to the attachment member 97, or access opening cover 98.
  • the bracket apparatus 99 is shown in this embodiment as two hinge block brackets 100 that extend downwardly from the access opening cover 98, each hinge block bracket 100 being positioned and structured to engage the respective hinge block 88 with which it is aligned.
  • a spacer 91 is preferably positioned between each of the hinge blocks 88 and the respective hinge block bracket 100 to ensure that the hinge block brackets
  • the spacers 91 may be either attached to or integrally formed with either the hinge blocks 88 or the bracket apparatus 99.
  • the check valve housing 94 is structured with two supporting ledges 92 on which the respective hinge blocks 88 are positioned when the check valve 80 is installed in place.
  • the downwardly extending hinge block brackets 100 engage the hinge blocks 88 and retain the hinge blocks 88 in position against the supporting ledges 92 and in registration with the check valve housing 94.
  • the access port 52 (FIG. 4) of the suction pipe 48 is opened by removal of the cover 54 to enable one to reach in and take hold of the flapper 82.
  • the access opening cover 98 is then removed by first removing the screws 104 and washers 106. Lifting and removal of the access opening cover 98 concurrently releases the hinge block brackets 100 from their registration against the hinge blocks 88.
  • the check valve 80 remains supported by the supporting ledges 92, and the check valve 80 can then be pulled outwardly away from the supporting ledges 92 to thereby release the hinge blocks 88 from the check valve housing 94.
  • the check valve 80 can then be removed through the suction pipe 48 access port 52. To install the new check valve 80, those steps are reversed.

Abstract

Un clapet anti-retour de type à battant est conçu pour être utilisé dans une pompe à amorçage automatique de manière à faciliter la maintenance du clapet anti-retour et comprend des moyens de fixation disposés à l'extérieur du boîtier ainsi qu'un battant disposé dans une ouverture du boîtier de manière à faciliter la maintenance du clapet sans faire que le battant ou le matériel ne tombe à l'intérieur de la pompe.
EP06813361A 2005-08-11 2006-08-10 Clapet anti-retour destine a une pompe a amorçage automatique Withdrawn EP1922503A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US70739205P 2005-08-11 2005-08-11
US11/501,476 US7641253B2 (en) 2004-04-09 2006-08-09 Adjustable shelving system for vehicles
PCT/US2006/031199 WO2007019560A2 (fr) 2005-08-11 2006-08-10 Clapet anti-retour destine a une pompe a amorçage automatique

Publications (2)

Publication Number Publication Date
EP1922503A2 true EP1922503A2 (fr) 2008-05-21
EP1922503A4 EP1922503A4 (fr) 2013-01-09

Family

ID=39313372

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06813361A Withdrawn EP1922503A4 (fr) 2005-08-11 2006-08-10 Clapet anti-retour destine a une pompe a amorçage automatique

Country Status (1)

Country Link
EP (1) EP1922503A4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2592316A1 (fr) * 2011-11-11 2013-05-15 Airbus Operations Limited Ensemble soupape de retenue

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1982189A (en) * 1929-08-21 1934-11-27 Anderson William Valve
US3279386A (en) * 1965-01-21 1966-10-18 Gorman Rupp Co Centrifugal pump
US3955592A (en) * 1973-11-14 1976-05-11 Guyton Glen B Check valve
US4842014A (en) * 1986-07-15 1989-06-27 Wheatley Pump And Valve, Inc. Check valve hanger mechanism
DE3829856A1 (de) * 1988-09-02 1990-03-08 Preussag Ag Bauwesen Rueckschlagklappe
US5056548A (en) * 1990-10-12 1991-10-15 Kf Industries, Inc. Check valve assembly with removable seat
US6887034B2 (en) * 2000-05-19 2005-05-03 The Gorman-Rupp Company Centrifugal pump having adjustable clean-out assembly

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1982189A (en) * 1929-08-21 1934-11-27 Anderson William Valve
US3279386A (en) * 1965-01-21 1966-10-18 Gorman Rupp Co Centrifugal pump
US3955592A (en) * 1973-11-14 1976-05-11 Guyton Glen B Check valve
US4842014A (en) * 1986-07-15 1989-06-27 Wheatley Pump And Valve, Inc. Check valve hanger mechanism
DE3829856A1 (de) * 1988-09-02 1990-03-08 Preussag Ag Bauwesen Rueckschlagklappe
US5056548A (en) * 1990-10-12 1991-10-15 Kf Industries, Inc. Check valve assembly with removable seat
US6887034B2 (en) * 2000-05-19 2005-05-03 The Gorman-Rupp Company Centrifugal pump having adjustable clean-out assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2007019560A2 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2592316A1 (fr) * 2011-11-11 2013-05-15 Airbus Operations Limited Ensemble soupape de retenue
US9599241B2 (en) 2011-11-11 2017-03-21 Airbus Operations Limited Clack valve assembly

Also Published As

Publication number Publication date
EP1922503A4 (fr) 2013-01-09

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