DE102007058009A1 - Valve - Google Patents

Valve

Info

Publication number
DE102007058009A1
DE102007058009A1 DE102007058009A DE102007058009A DE102007058009A1 DE 102007058009 A1 DE102007058009 A1 DE 102007058009A1 DE 102007058009 A DE102007058009 A DE 102007058009A DE 102007058009 A DE102007058009 A DE 102007058009A DE 102007058009 A1 DE102007058009 A1 DE 102007058009A1
Authority
DE
Germany
Prior art keywords
valve
collar
characterized
valve seat
circumferential
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Withdrawn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
DE102007058009A
Other languages
German (de)
Inventor
Jens Folkmar Andersen
Karsten Schack Madsen
Kenneth Rehhoff
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.)
Alfa Laval Kolding AS
Original Assignee
Alfa Laval Kolding AS
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 Alfa Laval Kolding AS filed Critical Alfa Laval Kolding AS
Priority to DE102007058009A priority Critical patent/DE102007058009A1/en
Publication of DE102007058009A1 publication Critical patent/DE102007058009A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32Details
    • F16K1/34Cutting-off parts, e.g. valve members, seats
    • F16K1/36Valve members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32Details
    • F16K1/34Cutting-off parts, e.g. valve members, seats
    • F16K1/36Valve members
    • F16K1/38Valve members of conical shape
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K25/00Details relating to contact between valve members and seat

Abstract

A valve with a valve housing (1), in which between a inlet (2) and an outlet (3) a valve seat (4) with a circumferential sealing surface (5) is arranged, with a valve plate (6) provided with actuating means (7 ) is connected to an actuating device to move the valve plate (6) for closing the valve in the closing direction (8) to a closed position and pressed against the valve seat (4), according to the invention is improved in terms of its use under hygienic operating conditions that at the A circumferential collar (9) is formed on the end face of the valve disk (6) which protrudes substantially in the closing direction (8) from the valve disk (6) and tapers towards its free end (10), wherein a radially outer circumferential surface (11) of the collar (9) to the circumferential sealing surface (5) of the valve seat (4) can be pressed. The inventive design allows a tight and secure closing of the valve without the use of sealing rings made of elastomeric material.

Description

  • The Invention relates to a valve with a valve housing, in which between a inlet and an outlet a valve seat with a circumferential sealing surface is arranged, with a Valve plate, which is connected to actuating means of an actuator is to the valve plate to close the valve in the closing direction to move to a closed position and to the Press valve seat.
  • Such a valve is for example from the US Pat. No. 7,178,553 B2 known. The known valve is intended in particular for applications in the automotive industry, for example, for controlling the cooling water circuit. In this case, high temperatures of well over 100 ° C can occur. As a material for the valve seat and the valve disc therefore bronze, stainless steel or brass is proposed. Also sealing rings made of elastomeric material can be used under certain circumstances to improve the sealing effect.
  • at the use of a generic valve in Food processing is not just a matter of that the valve closes tightly, but also on hygienic Conditions. Therefore, special care must be taken that All parts of the valve are easy to clean and contaminants or bacteria have no chance to fix themselves anywhere. The commonly used Sealing rings of elastomeric material, in particular of EPDM, FPM or NPR, unfortunately, are made by a combination of mechanical Erosion and chemical attack in their structure changed so that, for example, worn sealing rings to leaks lead or form niches that contain bacteria colonize. The sealing rings must therefore frequently be replaced. A disadvantage of the elastomeric material is also that it has a high thermal expansion coefficient, the about ten times larger than steel. Of the high thermal expansion coefficient must be in the design the grooves for the sealing rings are taken into account. At high temperatures, when the seal is greatly expanded, It must not be a shearing of the sealing ring when closing come of the valve. On the other hand, at low temperatures, If the sealing ring contracts, there is no gap on the valve seat arise, which would result in a leak, making a heavy Risk of product contamination would be associated.
  • task The invention is therefore a valve of the type mentioned to improve, so that with good sealing effect an operation under hygienic conditions as well as a simple and effective cleaning possible are.
  • The Invention solves the problem in that on the front side the valve disk, a circumferential collar is formed, which is substantially protrudes in the closing direction of the valve plate and to tapered at its free end, with a radially outer circumferential Surface of the collar to the circumferential sealing surface the valve seat is pressed. This arrangement is needed no sealing ring made of elastomeric material and so avoids the top mentioned, associated with the sealing disadvantages. Despite missing Sealing ring is achieved a good sealing effect, because the protruding Collar is tapered to its free end and therefore deformable even under low pressure. While closing of the valve, the collar is in the closing direction to the oblique arranged to the closing direction sealing surface of the Pressed valve seat, due to the narrowing Circumference of the sealing surface one from outside to inside acting force is exerted on the collar. Deformed The collar is small and fits perfectly to the sealing surface until it over his entire The circumference is fully sealing. For closing the valve requires only low closing forces because the free end of the protruding collar is due to the rejuvenated Design is particularly thin and therefore easily deformable, even if the collar is not made of elastomeric material. The Of course occurring deformation may only in elastic region of the material take place. Takes the outside acting force, so there first the relatively thin and easily deformable free end of the collar after, with the Area where the force starts from the outside, from the free one The end of the collar moves away to its thicker root. by virtue of the larger thickness, the collar is less there easily deformable and sets the attacking from the outside Force against a stronger counterforce. In this way the deformation always remains in the elastic range without it comes to plastic deformation.
  • One Another advantage of the embodiment of the invention is that with the valve closed, the against the front side of the valve plate pressing liquid also in radial direction from inside to outside against the collar press and tighten it to the conical surrounding Pressing sealing surface of the valve seat. To this Way the pressure force is increased to the sealing surface, when the fluid pressure increases, so that The valve is always tight even at high fluid pressure is.
  • In a preferred embodiment of the invention is the Collar integrally formed with the valve plate. The Making it easier and cheaper.
  • The valve disk is preferably made of a more flexible material than the valve seat, for example example of plastic, since this one hand is inexpensive and also causes the design of the desired shape only low production costs. On the other hand, in the usual dimensions, the elasticity of plastic for the purpose of the invention is particularly well suited. Such a valve disk can be produced for example by turning or by injection molding.
  • In In a preferred embodiment, the collar is made a material with a lower modulus of elasticity than that Material from which the core or other areas of the valve disk are designed. This embodiment is suitable for the injection molding in the two-component casting process. By this procedure you can see the core of the valve disk made of a material with higher Young's modulus and the collar of a material with pour less modulus of elasticity. It is even possible, the core and the operating rod off To make metal and the collar of a more flexible material than Metal, for example made of plastic.
  • By the measure that the radially outer circumferential Surface of the collar of the valve disk conically shaped are required to close the valve tightly Closing forces diminished because of the required Deformation less fails. For example, the outer conical surface of the collar of the valve disk with a perpendicular to the closing direction arranged plane an angle of about 63 °.
  • By the measure that the outer surface the collar of the valve disk with the sealing surface of the valve seat encloses an angle of about 3 °, the Optimized sealing effect at low closing forces, because the collar of the valve plate is only one way in this way small angle deformed inwards.
  • By the measure that the valve disc is on its front provided with a central bulge, so that in the area between the central bulge and the circumferential collar one annular depression arises, the usability the valve according to the invention under hygienic Operating conditions improved. When cleaning the valve in the opened state, cleaning fluid flows through the inlet against the front of the valve disk and leaves the valve through the outlet. Due to the protruding bulge on the front side of the valve disk, the cleaning liquid radially to the side against the inside of the circumferential collar where it removes impurities particularly effectively and, on the other hand, swirling at the edge of the free end of the collar becomes. The turbulence also turns the outside the collar and the valve seat particularly good of the cleaning fluid lapped, whereby the cleaning effect is improved.
  • In preferred embodiment, the valve seat is made Stainless steel. Since the valve seat in contrast to the collar of the valve disk not deform in the inventive arrangement must, the harder stainless steel used here without any disadvantage become. Its advantages are that it is opposite Corrosion is particularly resistant and very easily clean can be held. In addition, the valve housing of valves for use in the food industry anyway preferably made of stainless steel.
  • If the conical circumferential sealing surface of the valve seat with a plane arranged perpendicular to the closing direction may include an angle of about 60 ° Inventive valve disk with the mentioned Dimensions achieve an optimal sealing effect.
  • One Embodiment of the invention will be described below explained in more detail in the drawings. The figures show in detail:
  • 1 a valve according to the invention in a sectional view;
  • 2 : an enlarged partial view 1 ;
  • 3 an enlarged partial view of the valve seat;
  • 4 : an enlarged partial view of the valve disk.
  • In 1 you can see a valve housing 1 placed on its bottom with an inlet 2 and on its right side with an outlet 3 is provided. The valve housing 1 points in the area of the inlet 2 a valve seat 4 on, consisting of a cone-shaped, conical, circumferential sealing surface 5 consists. Opposite the valve seat 4 is a valve plate 6 arranged, which is an actuating rod 7 has, via which it is connected to an actuating device, not shown. This may be a conventional pneumatic piston-cylinder arrangement. Upon actuation of the actuator, the actuating rod 7 and with her the valve plate 6 in the closing direction 8th moved down and to the valve seat 4 pressed. To open the valve, the valve plate 6 over the operating rod 7 from the valve seat 4 lifted and opposite to the closing direction 8th moved up to the path between inlet 2 and outlet 3 to release the flow for a liquid. In the presentation of 1 is the valve plate 6 however in the closed position.
  • At the front of the valve disk 6 is a circumferential collar 9 molded, which is substantially in the closing direction 8th from the valve plate 6 sticks down and gets to its free end 10 rejuvenated. How to best in 2 detects, is to close the valve, a radially outer circumferential surface 11 of the collar 9 to the conical circumferential sealing surface 5 of the valve seat 4 pressed.
  • The collar 9 is integral with the valve plate 6 formed and molded from plastic. The radially outer circumferential surface 11 of the collar 9 is as well as the sealing surface 5 of the valve seat 4 conical, designed essentially in the form of a conical shell, but not parallel to it. Rather, between the outer conical surface 11 of the collar 9 on the one hand and the conical sealing surface 5 of the valve seat 4 on the other hand, an angle 12 of 3 ° provided in 2 For the sake of clarity, it is somewhat exaggerated. How to best in the 3 and 4 detects, closes the outer conical surface 11 of the collar 9 with a perpendicular to the closing direction 8th arranged level 13 an angle 14 from 63 ° on ( 4 ), while the conical sealing surface 5 of the valve seat 4 with the said level 13 an angle 15 of 60 ° ( 3 ).
  • In 4 you also realize that the collar 9 on its radially inner side also a circumferential surface 16 has, with the outer circumferential surface 11 an angle 17 of 42 °. How to best in 2 recognizes, is the free end 10 of the collar 9 rounded.
  • The valve plate 6 is also on its front with a central bulge 18 provided so that between the downwardly protruding bulge 18 and the likewise downwardly projecting circumferential collar 9 an annular recess 19 is trained. This serves to improve the cleaning effect, when cleaning the valve, the valve disc 6 from the valve seat 4 is lifted off and through the inlet 2 from below cleaning fluid flows upwards. The cleaning fluid is through the central bulge 18 in the annular recess 19 guided radially outwards, where they rest on the circumferential collar 9 meets and is strongly swirled by this. The whirling effect improves the cleaning effect.
  • If the valve disk 6 in closed position ( 1 ) to the valve seat 4 is pressed, shows another advantage of the embodiment of the invention. The in the inlet 2 Liquid is under pressure. Among other things, this pressure also applies in the direction of the arrow 20 ( 1 ) radially outward on the circumferential collar 9 and therefore presses it firmly against the valve seat 4 at. As a result, the sealing effect is improved.
  • 1
    valve housing
    2
    inlet
    3
    outlet
    4
    valve seat
    5
    sealing surface
    6
    valve disc
    7
    actuating rod
    8th
    closing direction
    9
    collar
    10
    Free The End
    11
    Outstanding area
    12
    angle
    13
    level
    14
    angle
    15
    angle
    16
    Outstanding area
    17
    angle
    18
    headquarters bulge
    19
    annular deepening
    20
    arrow
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
  • Cited patent literature
    • - US 7178553 B2 [0002]

Claims (11)

  1. Valve with a valve housing ( 1 ), in which between an inlet ( 2 ) and an outlet ( 3 ) a valve seat ( 4 ) with a circumferential sealing surface ( 5 ) is arranged, with a valve disc ( 6 ) provided with actuating means ( 7 ) is connected to an actuating device to the valve disc ( 6 ) for closing the valve in the closing direction ( 8th ) to a closed position and to the valve seat ( 4 ), characterized in that on the end face of the valve disk ( 6 ) a circumferential collar ( 9 ) is formed, which is substantially in the closing direction ( 8th ) from the valve plate ( 6 ) and moves to its free end ( 10 ), wherein a radially outer circumferential surface ( 11 ) of the collar ( 9 ) to the circumferential sealing surface ( 5 ) of the valve seat ( 4 ) can be pressed.
  2. Valve according to claim 1, characterized in that the collar ( 9 ) in one piece with the valve plate ( 6 ) is formed.
  3. Valve according to claim 1 or 2, characterized in that the valve disc ( 6 ) of a more flexible material than the valve seat ( 4 ), preferably made of plastic.
  4. Valve according to claim 1, characterized in that the collar ( 9 ) consists of a material with a lower modulus of elasticity than the material from which the core or other areas of the valve disk ( 6 ) are configured.
  5. Valve according to claim 4, characterized in that the core of the valve disc ( 6 ) and the actuating rod ( 7 ) consist of metal and the collar ( 9 ) consists of a more flexible material than metal, preferably made of plastic.
  6. Valve according to one of the preceding claims, characterized in that the radially outer circumferential surface ( 11 ) of the collar ( 9 ) of the valve disk ( 6 ) is conically shaped.
  7. Valve according to one of the preceding claims, characterized in that the outer surface ( 11 ) of the collar ( 9 ) of the valve disk ( 6 ) with the sealing surface ( 5 ) of the valve seat ( 4 ) an angle ( 12 ) of about 3 °.
  8. Valve according to one of the preceding claims, characterized in that the free end ( 10 ) of the collar ( 9 ) of the valve disk ( 6 ) is rounded.
  9. Valve according to one of the preceding claims, characterized in that the valve disc ( 6 ) on its front side with a central bulge ( 18 ), so that in the area between the central bulge ( 18 ) and the circumferential collar ( 9 ) an annular recess ( 19 ) arises.
  10. Valve according to one of the preceding claims, characterized in that the valve seat ( 4 ) consists of stainless steel.
  11. Valve according to one of the preceding claims, characterized in that the conical circumferential sealing surface ( 5 ) of the valve seat ( 4 ) with a direction perpendicular to the closing direction ( 8th ) level ( 13 ) an angle ( 15 ) of about 60 °.
DE102007058009A 2007-12-03 2007-12-03 Valve Withdrawn DE102007058009A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102007058009A DE102007058009A1 (en) 2007-12-03 2007-12-03 Valve

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007058009A DE102007058009A1 (en) 2007-12-03 2007-12-03 Valve
PCT/EP2008/009966 WO2009071217A1 (en) 2007-12-03 2008-11-25 Valve

Publications (1)

Publication Number Publication Date
DE102007058009A1 true DE102007058009A1 (en) 2009-06-04

Family

ID=40380678

Family Applications (1)

Application Number Title Priority Date Filing Date
DE102007058009A Withdrawn DE102007058009A1 (en) 2007-12-03 2007-12-03 Valve

Country Status (2)

Country Link
DE (1) DE102007058009A1 (en)
WO (1) WO2009071217A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK201070264A (en) 2010-06-15 2011-12-16 Alfa Laval Corp Ab Self sealing bonnet
EP2597342A1 (en) 2011-11-28 2013-05-29 Alfa Laval Corporate AB Seat valve with anti-fouling properties

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB167306A (en) * 1920-05-11 1921-08-11 Henry Selby Hele Shaw Improvements in and relating to valves for fluid pressure systems
US2147332A (en) * 1938-02-02 1939-02-14 Wolverine Brass Works Valve structure
US2911185A (en) * 1954-03-02 1959-11-03 Jesse D Langdon Inflatable valve member
US2985180A (en) * 1958-01-27 1961-05-23 Gen Controls Co Drain valve
DE1162154B (en) * 1957-08-29 1964-01-30 Charles Elliott Tapscott Cridl With a shut-off device made of elastic material Verschlussstueck
US3123337A (en) * 1964-03-03 Pxras
DE1294767B (en) * 1962-12-12 1969-05-08 Siver Chester Asa poppet
DE10237364A1 (en) * 2002-08-12 2004-03-04 Norbert Martin Back pressure valve for e.g. gas an oil pipelines with inner housing contour and valve plate edge defining ring channel formed for almost constant flow speed across complete valve plate stroke
US7178553B2 (en) 2004-02-27 2007-02-20 Dana Canada Corporation Leak-resistant solenoid valves

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3418708A (en) * 1962-12-12 1968-12-31 Chester A. Siver Method of making valves by electron beam welding
US3327992A (en) * 1965-01-06 1967-06-27 Sloan Valve Co Control valves
BE686469A (en) * 1966-09-06 1967-02-15
FR2461864B1 (en) * 1979-07-19 1983-04-01 Centre Techn Ind Mecanique
US20080099082A1 (en) * 2006-10-27 2008-05-01 Honeywell International Inc. Gas valve shutoff seal

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123337A (en) * 1964-03-03 Pxras
GB167306A (en) * 1920-05-11 1921-08-11 Henry Selby Hele Shaw Improvements in and relating to valves for fluid pressure systems
US2147332A (en) * 1938-02-02 1939-02-14 Wolverine Brass Works Valve structure
US2911185A (en) * 1954-03-02 1959-11-03 Jesse D Langdon Inflatable valve member
DE1162154B (en) * 1957-08-29 1964-01-30 Charles Elliott Tapscott Cridl With a shut-off device made of elastic material Verschlussstueck
US2985180A (en) * 1958-01-27 1961-05-23 Gen Controls Co Drain valve
DE1294767B (en) * 1962-12-12 1969-05-08 Siver Chester Asa poppet
DE10237364A1 (en) * 2002-08-12 2004-03-04 Norbert Martin Back pressure valve for e.g. gas an oil pipelines with inner housing contour and valve plate edge defining ring channel formed for almost constant flow speed across complete valve plate stroke
US7178553B2 (en) 2004-02-27 2007-02-20 Dana Canada Corporation Leak-resistant solenoid valves

Also Published As

Publication number Publication date
WO2009071217A1 (en) 2009-06-11

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee

Effective date: 20110701