WO2008126097A1 - Clapet à deux battants - Google Patents

Clapet à deux battants Download PDF

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Publication number
WO2008126097A1
WO2008126097A1 PCT/IN2007/000217 IN2007000217W WO2008126097A1 WO 2008126097 A1 WO2008126097 A1 WO 2008126097A1 IN 2007000217 W IN2007000217 W IN 2007000217W WO 2008126097 A1 WO2008126097 A1 WO 2008126097A1
Authority
WO
WIPO (PCT)
Prior art keywords
holder
slot
check valve
locking plate
prevent
Prior art date
Application number
PCT/IN2007/000217
Other languages
English (en)
Inventor
Uma Shanker
George Mathew
Original Assignee
Advance Valves Pvt. Ltd.
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 Advance Valves Pvt. Ltd. filed Critical Advance Valves Pvt. Ltd.
Publication of WO2008126097A1 publication Critical patent/WO2008126097A1/fr

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
    • F16K15/035—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member with a plurality of valve members
    • F16K15/036—Dual valve members with hinges crossing the flow line substantially diametrical
    • F16K15/038—Dual valve members with hinges crossing the flow line substantially diametrical having a common hinge

Definitions

  • the invention relates to a dual plate check valve.
  • This valve is used in pipe lines/piping systems to allow flow in one direction and prevent reversal of flow of fluid.
  • the valves are self operated, i.e., the fluid in the pipe line operates the valve depending upon fluid momentum.
  • the plates are opened by the differential pressure across the plates and then kept in partially or fully opened position by the dynamic fluid momentum exerted by the fluid on the plates.
  • Dual plate check valve consists of an annular housing body. This body has an up stream end and down stream end with a through passage. There are two substantially semicircular openings. These openings are, formed by providing an integral diameteral beam in the passage of the body. Two substantially semi-circular plates known also as flaps or flappers, may be of D shape are provided to effectively close the openings. These plates are hinged in one or two hinge pins and loaded with a spring. Plates movement more than 90° is stooped by a stop pin. The stop pin may be provided parallel to and down stream of the hinge pin. Each end of the hinge pin and stop pin is inserted in socket provided in a holder. The present invention arrests the movement of the holder.
  • hinge pin and stop pins are fitted on the valve body by diametrically opposite radial holes on the body , these holes are closed by pipe plugs called retainer.
  • US 4694 853 teaches a wafer check valve having an annular housing , closing flaps effective to close a passage through the housing and spring urged to a passage closing position, the flaps being mounted on one or more hinge pins, the or each pin extending to each end into bore in an insert, the inserts being received in the respective slots in the body and including means retaining the inserts in the slots without movement.
  • the means retaining inserts is a L shaped ring which is fitted into groove at the down stream end of the body. Slots extend from the groove. The ring has a smaller outer radius than the external radius of the body and is held in position in the valve body by screws.
  • the inserts are retained in the slot formed in the housing with out movement by a L shaped rings.
  • This ring give problems at the time of assembling in the pipe line or very accurate machining is required for groove in the housing as well as of the ring and proper fixing of screws.
  • EP 0753 116 teaches a dual plate check valve comprising an annular housing and two closing flaps effective to close a passage through the housing, the flaps being mounted on one or more hinge pins, each of the hinge pin extending at each end into a socket in an insert, the inserts being received in the respective open sided recess in the annular housing characterized in that each said insert is retained in a recess by means of a respective keeper plate located in a generally radially outwardly extending slot formed in said annular housing, and said keeper plate is retained in said radial slot by means of retaining screws, dowels pins, pegs, or clips located in bores in said annular housing and extending into or through corresponding bores formed in said keeper plate.
  • the inserts are retained by a keeper plate being fixed in a slot formed in the housing and in the inserts and retained with the help of screws, dowels, pins or clips. Machining of said slot is cumbersome and gives problem in assembling.
  • the main object of the present invention is to provide leakage free dual plate check valve to prevent leakage of fluid from fluid path in the valve chamber to environment.
  • Another object of the invention is to provide a dual plate check valve with an easily replaceable and cheap to manufacture wear part used in the dual plate check plate valve assembly.
  • Further object of the invention is to provide a means to prevent all radial and axial movements of holder.
  • Further object of the invention is to provide socket head screw to prevent any movement of locking plate.
  • a dual plate check valve which comprises a annular valve body having up stream and down stream end, a through passage with two substantially semi-circular openings, two substantially semi-circular plates to effectively close the said two openings, the said plates being hinged on at least one hinge pin and loaded with a spring and a stop pin to prevent the plate from toppling over, two diametrically opposite slots extending radially outward in the passage and axially up to down stream end of said valve body, two holders sliding received in respective slots, each holder having at least two sockets, one for retaining hinge pin and the other for retaining the stop pin, each holder after assembling at each end of the said hinge pin and stop pin fitted slidingly in respective slot and means to prevent axial movement and radial movement of said holders, characterized in that the means to prevent the axial movement of each holder is a locking plate received in the recess surrounding said slot on said down stream end, each locking plate being fixed to the said body with one or more screws, and either said slot and
  • FIG. 1 and FIG. 2 shows the isometric view of embodiments of the invention.
  • FIG 3, 4, 5 shows cross sectional view, detailed cross sectional view and plan view of embodiment where the holder and slots has cross section substantially semi circular and segment shaped locking plates having a step recess to match the projection in the holder.
  • FIG 6,7,8 shows cross sectional view, detailed cross sectional view and plan view of embodiment where the holder and slots has cross section substantially semi circular and segment shaped locking plates having a tapered recess matching the tapered projection in the holder.
  • FIG 9,10,11 shows cross sectional view, detailed cross sectional view and plan view of embodiment where the holder and slots has cross section substantially semi circular and rectangular shaped locking plates having a step recess to match the projection in the holder.
  • FIG 12,13,14 shows cross sectional view, detailed cross sectional view and plan view of embodiment where the holder and slots has cross section substantially semi circular and rectangular shaped locking plates having a L cross section.
  • FIG 15,16,17 shows cross sectional view, detailed cross sectional view and plan view of embodiment where the holder and slots has more than half round cross section and a substantially semi circular cross section locking plates.
  • FIG 18,19,20 shows cross sectional view, detailed cross sectional view and plan view of embodiment where the holder and slots has a Dow tail cross section substantially semi circular cross section locking plates.
  • the dual plate check valve has an annular valve body (1) with up stream end (15) and down stream end (16).
  • a through passage (17) with two substantially semi-circular openings is provided in the passage of the valve body (1). These said two openings are having seat for effectively closing with out leakage by substantially semi-circular D shaped plates (2).
  • These plates are hinged on at least one hirige pin (5) and loaded with a spring (7).
  • One hinge pin for one plate or both hinge plates can be hinged on one hinge pin.
  • a stop pin (6) is also provided to prevent the plate from toppling over i.e., to restrict the movement of the hinge plate by not more than 90°.
  • Two diametrically opposite slots (10) extending radial outwardly are provided in the passage (17) and these slots are axially up to down stream end (16) of said valve body (1).
  • Two holders (8) are sliding received in respective slots (10).
  • Each holder (8) has at least two sockets (9), one for retaining hinge pin (5) and the other for retaining the stop pin (6).
  • Each holder (8) after assembling each end of the said hinge pin (5) and stop pin (6) are fitted slidingly in respective slot (10). These holders are prevented axial movement and radial movement by a suitable means.
  • the preferred means to prevent the axial movement of each holder (8) is a locking plate (11), which is received in the recess (12), surrounding the said slot (10) on said down stream end.
  • Each locking plate (11) is fixed to the said body with one or more screws (13).
  • the shape of said slots (10) and holders (8) are having a particular shape so as to prevent radial movement. The radial movement can further be prevented by having a particular shape of locking plates (11) and the holders (8).
  • each of the said holder (8) has a cross section substantially lying between a semi-circle and a circle when viewed axially and the slot (10) has a matching opening for slidingly receiving the holder in the slot and to prevent radial movement of the holder.
  • each slot and holder can be configured in dove-tail shape for slidingly receiving the holder in the slot and to prevent radial movement of the holder.
  • Top surface of the holder (8) and the abutting surface of the locking plate (11) may be plain. Axial movement is prevented by the locking plate (11) in both embodiments.
  • each holder (8) is configured to have tapered surface) on its down stream end, and locking plate also can be configured to have corresponding matching tapered recess to prevent radial movement of the holder in another embodiment.
  • both holders (8) are configured to have step projection on its downstream end and the locking plate is configured to have a corresponding matching recess (14) to prevent radial movement of the holder.
  • each holder (8) is configured to have a flat surface on its downstream end and the locking plate is configured to have a L shaped projection which overlaps the outer side of the holder in the passage to prevent radial movement of the holder.
  • Each said holder can be configured to have a projection on its down stream end, and the locking plate can be configured to have a corresponding matching recess to prevent radial movement of the holder in another embodiment.
  • Each of the said holders can be configured to have any shape of recess on its downstream end and the locking plate can be configured to have a corresponding matching projection to prevent radial movement. All of the above said embodiments may have substantially semicircular shape of the slot when viewed axially and corresponding matching cross section of the holder.
  • the locking plate (11) of any of the above embodiments has the shape of a sector of a circle or has a rectangular shape.
  • the locking plate is fixed in corresponding matching recess in the valve body surrounding the downstream end of the two slots in the body.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)

Abstract

La présente invention concerne un clapet à deux battants comprenant un corps de clapet annulaire, présentant une extrémité amont et une extrémité aval, un passage doté de deux ouvertures sensiblement circulaires, deux battants sensiblement semi-circulaires pour fermer efficacement lesdites deux ouvertures, lesdits battants étant articulés sur au moins un axe et chargés avec un ressort et une goupille d'arrêt pour empêcher le battant de tomber, deux fentes diamétralement opposées s'étendant radialement vers l'extérieur dans le passage et axialement de l'extrémité amont à l'extrémité aval dudit corps de clapet, deux supports reçus de manière coulissante dans les fentes respectives, chaque support présentant des socles destinés à retenir l'axe et la goupille d'arrêt, lesdits supports après assemblage à chaque extrémité desdits axe et goupille d'arrêt étant montés de manière coulissante dans la fente respective et un moyen pour empêcher le déplacement axial et le déplacement radial desdits supports. L'invention est caractérisés en ce que ledit moyen pour empêcher le déplacement axial de chaque support est une plaque de verrouillage reçue dans l'évidement entourant ladite fente sur ladite extrémité aval, chaque plaque de verrouillage étant fixée sur ledit corps par une ou plusieurs vis, et soit lesdits fente et support soit lesdits support et plaque de verrouillage étant configurés pour empêcher le déplacement radial du support.
PCT/IN2007/000217 2007-04-12 2007-05-30 Clapet à deux battants WO2008126097A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN805/DEL/2007 2007-04-12
IN805DE2007 2007-04-12

Publications (1)

Publication Number Publication Date
WO2008126097A1 true WO2008126097A1 (fr) 2008-10-23

Family

ID=38830362

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2007/000217 WO2008126097A1 (fr) 2007-04-12 2007-05-30 Clapet à deux battants

Country Status (1)

Country Link
WO (1) WO2008126097A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014049349A1 (fr) * 2012-09-25 2014-04-03 Drysdale Brothers (Larbert) Limited Soupape
EP3205911A1 (fr) 2016-02-15 2017-08-16 Castflow Valves, S.L. Soupape de retenue oscillante à double plaque
EP3263960A1 (fr) 2016-06-24 2018-01-03 Castflow Valves, S.L. Soupape de retenue oscillante à double plaque

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678958A (en) * 1970-09-16 1972-07-25 Fmc Corp Check valve
US4694853A (en) * 1984-05-02 1987-09-22 R. Goodwin International Ltd. Wafer check valves
GB2264161A (en) * 1992-02-10 1993-08-18 Robert Muddiman Fluid check valve
US5819790A (en) * 1994-03-30 1998-10-13 Goodwin International Limited Fluid check valve
EP1336781A1 (fr) * 2001-07-10 2003-08-20 Belgicast Internacional, S.L. Soupape de retenue

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678958A (en) * 1970-09-16 1972-07-25 Fmc Corp Check valve
US4694853A (en) * 1984-05-02 1987-09-22 R. Goodwin International Ltd. Wafer check valves
GB2264161A (en) * 1992-02-10 1993-08-18 Robert Muddiman Fluid check valve
US5819790A (en) * 1994-03-30 1998-10-13 Goodwin International Limited Fluid check valve
EP1336781A1 (fr) * 2001-07-10 2003-08-20 Belgicast Internacional, S.L. Soupape de retenue

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014049349A1 (fr) * 2012-09-25 2014-04-03 Drysdale Brothers (Larbert) Limited Soupape
EP3205911A1 (fr) 2016-02-15 2017-08-16 Castflow Valves, S.L. Soupape de retenue oscillante à double plaque
ES2629868R1 (es) * 2016-02-15 2017-10-24 Castflow Valves, S.L. Válvula de retención de doble placa de charnela
EP3263960A1 (fr) 2016-06-24 2018-01-03 Castflow Valves, S.L. Soupape de retenue oscillante à double plaque

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