WO2003087638A1 - Clapet bidirectionnel - Google Patents

Clapet bidirectionnel Download PDF

Info

Publication number
WO2003087638A1
WO2003087638A1 PCT/IB2003/001370 IB0301370W WO03087638A1 WO 2003087638 A1 WO2003087638 A1 WO 2003087638A1 IB 0301370 W IB0301370 W IB 0301370W WO 03087638 A1 WO03087638 A1 WO 03087638A1
Authority
WO
WIPO (PCT)
Prior art keywords
poppet
movable
valve body
fluid
valve seat
Prior art date
Application number
PCT/IB2003/001370
Other languages
English (en)
Inventor
Hugh Hambly
Brian Thornton
Original Assignee
Spill Check 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 Spill Check Ltd. filed Critical Spill Check Ltd.
Priority to AU2003226580A priority Critical patent/AU2003226580A1/en
Publication of WO2003087638A1 publication Critical patent/WO2003087638A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/047—Preventing foaming, churning or cavitation
    • 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
    • F16K17/18—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on either side

Definitions

  • the invention relates to a bidirectional check valve that prevents the movement of fluids in a hydraulic system when the pressure of the fluid is less than a predetermined value.
  • bidirectional valves have internal configurations that cause abrupt directional changes that cause unacceptable pressure rises with increased flows.
  • Conventional bidirectional valves are generally incapable of reliably operating with continuously high flow rates in an open position and yet only close to block flows at low pressures.. Indeed, as flow induced pressure increases across bidirectional check valves that are conventional, such increases adversely affect downstream pressure controlled functions and create excessive fluid heating because of flow/ pressure drop energy losses.
  • One aspect of the invention reside in a bidirectional check valve having a configuration that allows a Venturi effect to arise whereby flow across poppet / seat areas causes a dynamic pressure drop that assists in opening the poppet against spring pressures.
  • Such a configuration minimizes pressure drop changes across the valve relative to flow rate changes and is thus less susceptible to giving rise to pressure increases with flow increases.
  • the configuration includes a valve body in which is arranged a poppet.
  • the poppet presses against an inside surface of the valve body under spring bias, but fluid forces exerted by fluid entering one end of the valve body may force the valve body against spring bias out of contact with the inside surface, thereby opening a channel between the inside surface and an outside surface of the poppet for the fluid flow to reach an opposite end of the valve body.
  • a further poppet is arranged within a hollow cavity of the outer poppet and is movable in unison with the poppet.
  • the further poppet is pressed against a valve seat under a further spring bias.
  • This further spring bias is exerted by a spring that engages an end of the further poppet and an inside surface of the poppet.
  • the outer surface of the further poppet is fluted, which defines passages for the fluid flow once the valve seat is cleared.
  • Fig. 1 is an exploded view of a bidirectional check valve according to U.S. Patent No. 6,216,729 B1.
  • Fig. 2 shows the bidirectional check valve of Fig. 1 in an assembled condition with the valve closed to prevent fluid flow in both forward and reverse directions.
  • Fig. 3 shows the bidirectional check valve of Fig. 1 in an assembled condition with the valve open to permit fluid flow in a forward direction.
  • Fig. 4 shows the bidirectional check valve of Fig. 1 in an assembled condition with the valve open to permit fluid flow in a reverse direction.
  • Fig. 5 shows a conventional excavator vehicle which includes a hydraulic system.
  • Fig. 6 shows a hydraulic system of the excavator vehicle shown in Fig. 5 that is modified to incorporate the bidirectional check valve of the present invention.
  • Fig. 7 is an end view of the further poppet in accordance with U.S. Patent No. 6,216,729 B1.
  • Fig. 8 is a sectional side view taken across 8-8 of Fig. 7.
  • Fig. 9 is an end view of the further poppet in accordance with the invention.
  • Fig. 10 is a sectional side view taken across 10-10 of Fig. 9.
  • Fig.11 is a further sectional side view taken across 11-11 of Fig. 9. DETAILED DESCRIPTION OF THE INVENTION
  • Figure 1 shows an exploded view of a bidirectional check valve
  • the bidirectional check valve includes a valve body or block 103 having an opening or port 116 at one end and another opening or port 117 at its opposite end.
  • the openings 116 and 117 are connected by a passage 115 that extends throughout the valve block. Though two ports are shown, the bidirectional check valve may include additional ports.
  • a movable poppet 104 is arranged within the passage 115, such as by insertion through the opening 117.
  • the poppet is typically held in place by a portion of its outer wall 130 which contacts the passage wail 128.
  • the poppet 132 are formed in the outer wall 120 and, together with the wall 128, define one or more channels 139.
  • the poppet also includes a cavity 118 having an opening 119 at one end and an opening 120 at an opposite end.
  • the outer wall 130 of the poppet also includes a tapered portion 134 near the opening 119 which is configured so that at least a portion of the tapered region may fit snugly against a narrowed portion 129 of the inner wall 128 of the valve block.
  • a spring 105 is disposed within the cavity 118 along a passage wall
  • a further poppet 106 located within the cavity 118, adjacent to the spring 105, is a further poppet 106.
  • a passage 122 is formed within the further poppet 106 and has an opening 124 at one end of the further poppet.
  • One or more openings 123 are present in the outer wall of the further poppet 106. The openings 123 open to an opposing end of the passage 122 which is adjacent to a widened end face 144 of the further poppet.
  • a valve seat 108 is arranged within the cavity 118 adjacent to the tapered end of the further poppet 106.
  • An opening 140 extends through the width of the valve seat 108 and includes a widened end face 144 at an end of the valve seat that is nearest the tapered end of the further poppet.
  • the widened end face 144 of the opening and the tapered end of the further poppet together define a channel 148 between the valve seat 108 and openings 123 when the further poppet is displaced from the valve seat.
  • a seal 107 such as an o-ring, is located in a groove or notch formed in the outer wall of the valve seat and prevents fluid leakage along the outer wall of the valve seat.
  • a retaining ring 109 such as a snap ring, is seated within the passage
  • a spring 110 is also provided and has a portion that is inserted into the cavity 118 and abuts the retaining ring 109. Another portion of the spring 110 extends beyond the poppet into the passage 115 of the valve block 103 and mates with an adapter 111.
  • the adapter is also disposed within the passage 115 of the valve block 103.
  • An opening 150 extends through the width of the adapter and includes a ledge 152 upon which the spring 110 is seated.
  • a further retaining ring 112 is arranged within the passage 115 and is adjacent to the adapter 111.
  • an end adapter101 is secured to the valve block 103 at opening 116, such as by threads or other types of connections, to permit the valve block to be connected to a hydraulic line or other hydraulic leads, for example.
  • a seal 102 which may be an o-ring, is provided between the end adapter 101 and the valve body or block 103.
  • Another end adapter 114 may be secured to the valve block 103 at opening 117 using threads or other types of connections, for example.
  • Another seal 113 such as an O-ring, is provided between the end adapter 114 and the valve block 103.
  • FIG. 2 shows the bidirectional check valve 100 of the invention when the valve is closed in both directions to the passage of fluid.
  • the valve 100 is closed in both directions under any of the following conditions: (1) when no fluid is present at both sides of the valve, (2) when no fluid is present at the opening 116 of the valve and the fluid pressure at the opening 117 is less than the force exerted by the spring 105, (3) when no fluid is present at opening 117 and the fluid pressure at opening 116 is less than the force exerted by the spring 110, and (4) when the fluid pressure on each side of the valve is less than the force exerted by springs 105 and 110, respectively.
  • the spring 110 drives the poppet 104 in the direction of opening 116 and secures part or all of the tapered end of the outer wall 130 of the poppet 104 against at least a part of the narrowed end 129 of the wall .128 of the passage 115 so that the flow of fluid from opening 116 into the channels 134 is cut off.
  • the spring 105 drives the further poppet 106 in the direction of opening 117 and secures part or all of the tapered end of the outer wall of the further poppet against at least a part of the widened end of the opening in the valve seat 108 so that the flow of fluid from opening 117 into the openings 123 of the further poppet 106 is cut off.
  • Figure 3 depicts the bidirectional check valve 100 when the valve is open in one direction to permit the passage of fluid from the opening 116 to the opening 117, namely when the fluid pressure at opening 116 is greater than the force exerted by the spring 110.
  • the force of the fluid drives the poppet 104 in the direction of opening 117 and moves the tapered end 134 of the outer wall of the poppet 104 away from the narrowed end 129 of the wall of the passage 115 which permits the flow of fluid from opening 116 into the channels 139, past the end of the poppet 104 and through the opening 117.
  • FIG. 4 shows the bidirectional check valve 100 of the invention when the valve is open in the opposite direction to permit the passage of fluid from the opening 117 to the opening 116, namely when the fluid pressure at opening 117 is greater than the force exerted by the spring 105.
  • the force of the fluid drives the further poppet 106 in the direction of opening 116 and moves the widened end face 144 of the further poppet away from the widened end 142 of the opening in the valve seat 108 which permits the flow of fluid from the opening 117 through opening 150 of the adapter 111 and opening 140 of the valve seat 108, and into the channel 148 formed between the outer wall 146 of the further poppet and the wall 133 of the passage within the poppet.
  • the fluid then flows through the openings 123 into the passage 122 within the further poppet and then through the opening 119 of the poppet to the opening 116 of the valve block.
  • the spring 110 holds the tapered end of the outer wall 130 of the poppet
  • the bidirectional check valve of the invention is a self- contained device that may be installed in a fluid line or conduit, such as in a fluid powered hydraulic system.
  • the direction of fluid flow through the valve is reversible, as is the direction in which fluid flow is blocked.
  • An additional advantage is that the valve closes in a given direction whenever the fluid pressure decreases to less than a predetermined value.
  • the valve blocks the flow of fluid from other portions of the hydraulic system and maintains fluid pressure in these portions. The valve also reduces the amount of fluid that leaks out, thereby reducing possible environmental contamination from the fluid.
  • valve opens in a respective direction when the fluid pressure rises above a predetermined value.
  • the pressure at which the valve opens or closes in a given direction may be determined by the choice of spring force for the spring that checks fluid flow in that direction.
  • FIG. 5 illustrates an example of a conventional excavator vehicle which includes a hydraulic system 200.
  • Hydraulically driven boom cylinders 201a, 201b drive a boom 203 in an upward or downward direction.
  • a hydraulically driven arm cylinder 205 drives an arm 207 which is pivotally connected to the boom 203.
  • Tongs 209 are coupled to the arm 207 and are driven by hydraulic motors 313. The tongs may be opened or closed by an operator to grasp large objects, such as cut trees, logs or beams.
  • Figure 6 shows an example of a closed-loop hydraulic system which may be employed in the conventional excavator vehicle of Figure 5 and which includes one or more of the bidirectional check valves of the invention.
  • a hydraulic pump 303 pumps hydraulic fluid from a reservoir 301 through one or more supply lines.
  • the pump 303 drives hydraulic fluid through a supply line 310A via valve sections 307 to a rotator 309.
  • the fluid is returned to the reservoir 301 via a return line 310B and a filter 317.
  • the pump 303 drives hydraulic fluid via the valve sections
  • the bidirectional check valves 305 of the invention may be installed in one or more of the supply lines to permit fluid to be delivered to the rotator 309 or to the valve sections 311 only when the pressure in the supply lines exceeds a predetermined value.
  • the bidirectional check valves may also be installed in one or more of the return lines to permit fluid to be returned from the rotator 309 or from the valve sections 311 only when the pressure in the return lines exceed a predetermined value.
  • hydraulic fluid is only supplied to the rotator 309, the hydraulic motors 313 and the hydraulic cylinders 315 when there is sufficient fluid pressure for their proper operation.
  • the bidirectional check valves close and prevent the sudden loss of hydraulic fluid from the rotator 309, the hydraulic motors 313 and/or the hydraulic cylinders 315, thereby avoiding a sudden and potentially catastrophic failure.
  • the bidirectional check valve of the invention may also be employed in other applications that use a hydraulic system.
  • Figs. 7 and 8 show the further poppet 106 of U.S.
  • This further poppet 106 has a passage 122 formed within.
  • One or more openings 123 are present in an outer wall of the further poppet 106 that are in fluid communication with the passage 122 and thereby with the one end 124.
  • fluid may flow through the valve seat and around the widened end 144 to enter the openings 123 and thereby flow through the passage 122 and out the one end 124.
  • the further poppet 20 may be used a replacement for the further poppet 106 in the bidirectional check valve of U.S. Patent No. 6,216,729 B1.
  • the general operation and movement of the further poppet 20 remains the same as was the case for the further poppet 106, except that the fluid flow will not enter any openings or passage inside of the further poppet. That is, the further poppet 20 is closed from the outside so that it has no internal passage. Instead, the further poppet 20 has a plurality of flutes or recesses 22 on its outer surface that form recesses through which the fluid flows between the inside surface of the poppet 104 and the outer surface of the further poppet 20.
  • the further poppet 20 is under spring bias from a spring 105 that abuts against a ledge 135 that is formed in the passage wall near the opening 119 of the poppet.
  • the further poppet includes the widened end face 144, a fluted or recessed region, a transition region (that is rounded, beveled or tapered) between the widened end face 144 and said fluted or recessed region, and a distal region that is of a dimension that is wider than that of said recessed region.
  • the fluted or recessed region has the flutes or recesses 22.
  • the turbulence caused by the fluid passing through the openings 123 of the further poppet 106 was eliminated, because the further poppet 20 has no such openings. Instead, the use of the flutes or recesses 22 with the shouldering configuration as shown eliminated the turbulence problem.
  • the poppets are constantly guided throughout the flow range via the fluting and shouldering configuration, and can operate continuously in the open position without risk of tilting or binding.
  • the bidirectional check valve of the present invention incorporates in its design for both poppet and seat combinations, a configuration that provides a Venturi effect, whereby the flow across the poppet / seat areas causes a dynamic pressure drop that assists in opening the poppet against spring pressures.
  • This bidirectional check valve of the present invention as configured is suited for continuous operating pressures in the 4000 PSI plus range.
  • the poppet / seat configuration, material choice, and hardness contribute to resist erosion during normal operation to retain proper sealing capabilities of the valve.
  • Conventional bidirectional check valves that use soft element seats and flat surface seats are incapable of resisting erosion to the same degree or to retain proper sealing capabilities during normal operation as in the present invention.

Abstract

L'invention concerne un clapet bidirectionnel (100) de régulation du mouvement d'un fluide. Un corps (103) de clapet présente une première ouverture (116), une seconde ouverture (117) et un passage (115) connectant la première ouverture (116) et la seconde ouverture (117). Un premier champignon amovible (104) définit une cavité (118) et est disposé dans le passage (115) du corps (103) du clapet, et un ressort (105) est couplé au premier champignon amovible (104). Un second champignon (106) est disposé dans la cavité (118), et un second ressort (110) est couplé au premier champignon amovible (104) et au second champignon (106). Lorsqu'un fluide passant par l'ouverture dans le corps (103) du clapet exerce une force sur le champignon amovible (104) supérieure à la force du ressort, la seconde partie de la surface extérieure du champignon amovible (104) s'éloigne de la seconde partie de la paroi du passage (115) et permet au fluide de s'écouler à partir de l'ouverture (116) dans le corps du clapet à travers un premier canal et par la seconde ouverture (117) du corps (103) du clapet. Lorsque le fluide passant par la seconde ouverture (117) dans le corps du clapet exerce une force sur le second champignon (106) supérieure à la force du ressort, la seconde partie de la surface extérieure du second champignon (106) s'éloigne de la seconde ouverture (117) du corps du clapet de manière à ouvrir un second canal dans le champignon amovible (104) et à permettre au fluide de s'écouler à partir de la seconde ouverture du corps (103) du clapet à travers le second canal et une pluralité de cannelures ou d'évidements (22) dans une surface extérieure du second champignon (106) vers l'ouverture (116) du corps (103) du clapet.
PCT/IB2003/001370 2002-04-15 2003-04-14 Clapet bidirectionnel WO2003087638A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003226580A AU2003226580A1 (en) 2002-04-15 2003-04-14 Bidirectional check valve

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12349402A 2002-04-15 2002-04-15
US10/123,494 2002-04-15

Publications (1)

Publication Number Publication Date
WO2003087638A1 true WO2003087638A1 (fr) 2003-10-23

Family

ID=29248346

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2003/001370 WO2003087638A1 (fr) 2002-04-15 2003-04-14 Clapet bidirectionnel

Country Status (2)

Country Link
AU (1) AU2003226580A1 (fr)
WO (1) WO2003087638A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006128500A1 (fr) * 2004-12-23 2006-12-07 Bracco Research Sa Dispositif de transfert de liquide pour recipients d'administration medicaux
WO2008101753A1 (fr) * 2007-02-20 2008-08-28 Mann+Hummel Gmbh Corps de soupape pour dispositif de régulation de fluides
CN108953705A (zh) * 2018-08-21 2018-12-07 东莞海特帕沃液压科技有限公司 先导型平衡阀
CN110513515A (zh) * 2019-09-06 2019-11-29 新乡航空工业(集团)有限公司 制动系统用双向止回阀
WO2024068885A1 (fr) 2022-09-28 2024-04-04 Sfc Koenig Ag Raccord rapide pour un clapet anti-retour bidirectionnel et raccord de fluide comprenant deux tels raccords rapides

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2755816A (en) * 1949-05-07 1956-07-24 Collins Valve Company Inc Check valves
US4228820A (en) * 1977-12-30 1980-10-21 The Yorde Machine Products Company Seat guided poppet valve having flow and dampening control means
FR2577903A1 (fr) * 1985-02-28 1986-08-29 Thibonnet Bernard Dispositif d'equilibrage pour reservoir a carburant, notamment pour vehicules routiers
US5183075A (en) * 1986-04-12 1993-02-02 Stein Guenter Check valve
US6216729B1 (en) * 2000-05-08 2001-04-17 Parsons & Whittemore, Inc. Bidirectional check valve for hydraulic system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2755816A (en) * 1949-05-07 1956-07-24 Collins Valve Company Inc Check valves
US4228820A (en) * 1977-12-30 1980-10-21 The Yorde Machine Products Company Seat guided poppet valve having flow and dampening control means
FR2577903A1 (fr) * 1985-02-28 1986-08-29 Thibonnet Bernard Dispositif d'equilibrage pour reservoir a carburant, notamment pour vehicules routiers
US5183075A (en) * 1986-04-12 1993-02-02 Stein Guenter Check valve
US6216729B1 (en) * 2000-05-08 2001-04-17 Parsons & Whittemore, Inc. Bidirectional check valve for hydraulic system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006128500A1 (fr) * 2004-12-23 2006-12-07 Bracco Research Sa Dispositif de transfert de liquide pour recipients d'administration medicaux
WO2008101753A1 (fr) * 2007-02-20 2008-08-28 Mann+Hummel Gmbh Corps de soupape pour dispositif de régulation de fluides
CN108953705A (zh) * 2018-08-21 2018-12-07 东莞海特帕沃液压科技有限公司 先导型平衡阀
CN108953705B (zh) * 2018-08-21 2019-08-30 建湖县八达液压机械有限公司 先导型平衡阀
CN110513515A (zh) * 2019-09-06 2019-11-29 新乡航空工业(集团)有限公司 制动系统用双向止回阀
WO2024068885A1 (fr) 2022-09-28 2024-04-04 Sfc Koenig Ag Raccord rapide pour un clapet anti-retour bidirectionnel et raccord de fluide comprenant deux tels raccords rapides

Also Published As

Publication number Publication date
AU2003226580A1 (en) 2003-10-27

Similar Documents

Publication Publication Date Title
US6216729B1 (en) Bidirectional check valve for hydraulic system
CA2240929C (fr) Vanne a servocommande et systeme de regulation hydraulique incorporant celle-ci
US20070290151A1 (en) Valve
US7921867B2 (en) Elbow plug external sleeve valve
US20170363217A1 (en) Main Stage In-Line Pressure Control Cartridge with Optional Reverse Flow Function
WO2003087638A1 (fr) Clapet bidirectionnel
JPS5878898A (ja) 阻止・熱逃がし弁
JP3531758B2 (ja) 圧力補償弁を備えた方向制御弁装置
SE510508C2 (sv) Anordning för styrning av en hydraulisk motor
US6729346B2 (en) Pneumatic valve
EP0752535B1 (fr) Distributeur de commande directionnelle
US9518670B2 (en) Main stage in-line pressure control cartridge with stepped retainer collar
US4346733A (en) Control valve
EP1070854A2 (fr) Distributeur
WO2016205043A1 (fr) Cartouche de régulation de pression en ligne d'étage principal ayant un collier de retenue étagé
EP0348058A2 (fr) Vanne pour diriger un fluide
JP4614717B2 (ja) 方向制御弁
JPH0429884B2 (fr)
KR20020005952A (ko) 유압장치용 양방향 체크밸브
JPH081345Y2 (ja) 電磁流量制御弁
JP4610116B2 (ja) 弁装置
JPH0520602B2 (fr)
JPH0520601B2 (fr)
KR20210000973A (ko) 체크밸브
JP2001263515A (ja) バルブ構造

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SC SD SE SG SK SL TJ TM TN TR TT TZ UA UG UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP