WO1988005880A1 - Valve means - Google Patents

Valve means Download PDF

Info

Publication number
WO1988005880A1
WO1988005880A1 PCT/SE1987/000054 SE8700054W WO8805880A1 WO 1988005880 A1 WO1988005880 A1 WO 1988005880A1 SE 8700054 W SE8700054 W SE 8700054W WO 8805880 A1 WO8805880 A1 WO 8805880A1
Authority
WO
WIPO (PCT)
Prior art keywords
passages
valve
outlet
assembly
flow
Prior art date
Application number
PCT/SE1987/000054
Other languages
French (fr)
Inventor
Karl-Magnus Engelbertsson
Original Assignee
Ab Tore J. Hedbäck
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 Ab Tore J. Hedbäck filed Critical Ab Tore J. Hedbäck
Priority to EP19870901700 priority Critical patent/EP0313552B1/en
Priority to US07/204,428 priority patent/US4889163A/en
Priority to AT87901700T priority patent/ATE75014T1/en
Priority to DE8787901700T priority patent/DE3778368D1/en
Priority to FI881750A priority patent/FI89301C/en
Priority to DK248588A priority patent/DK167629B1/en
Publication of WO1988005880A1 publication Critical patent/WO1988005880A1/en

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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0605—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor with particular plug arrangements, e.g. particular shape or built-in means
    • 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
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member
    • F16K47/045—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member and the closure member being rotatable

Definitions

  • This invention relates to a valve assembly comprising a housing provided with an inlet and an outlet for fluid and a spherical body rotatably arranged in the valve housing between the in- and outlet and mounted sealingly against said valve housing, said valve body being provided with fluid flow passages.
  • a device having the characteristic features defined in the claims is suggested according to the invention.
  • Fig. 1 shows a longitudinal section of a valve according to a first embodiment of the invention
  • Fig. 2 shows the valve body according to the section II - I I in Fig. 1
  • Fig. 6 shows a section according to VI-VI in Fig. 7 of a second embodiment of the valve
  • Fig. 7 shows the valve according to the section VII-VII in Fig. 6.
  • the ball valve comprises a valve housing 1 provided with an inlet 2 and outlet 3 and a spherical valve body 4 rotatably arranged in the valve housing 1.
  • the valve body 4 is sealingly mounted against an annular space 5 formed in the valve housing 1 by means of two valve seat rings 6.
  • the valve seat rings 6 are fixedly connected to the valve housing 1 by their outer peripheries and have a clearance to the valve housing 1 at their inner peripheries in order to allow a resilient motion of the valve body 4.
  • the valve body 4 (Figs. 1, 2) is rotatable by means of a push rod (7) fixedly connected to the valve body 4 and is provided with two groups of passing flow passages 8, 9.
  • the flow passages 8, 9 with circular cross-sections are preferably grooved in transversal direction, for example by threads.
  • the groups of passages 8, 9 are arranged on both sides of the diametrical plane, the passages 8 having a smaller diameter than the passages 9.
  • the valve body 4 further comprises two smooth flow passages 10 of a larger diameter arranged in said plane. When the valve is closed all the passages end in the space 5. On the other hand, at an open valve the passages end in the in- and outlet 2 , 3 , as is apparent from Fig. 1.
  • ⁇ 25°.
  • a few number of passages 8 and 9, respectively, are opened.
  • the substantial fluid flow way is marked by arrows.
  • the passages 8 have a small diameter which causes a great flow resistance and consequently a great fall of pressure.
  • the grooves of the passages cause a still more increased flow resistance and greater fall of pressure simultaneously with a lower flow rate.
  • valve When the valve is opened more than 45° (Fig. 5) a part of the fluid can stream directly from the inlet to the outlet, this share of fluid increasing by increasing valve opening. At the same time the passages 10 are opened for a direct fluid flow from the inlet 2 to the outlet 3 which reduces the fall of pressure across the valve.
  • FIGs. 6-7 another embodiment of the invention is shown where the valve body 4 is turned out and provided with a cylindrical insert 11.
  • the insert 11 comprises a number of concentric, spaced apart, tubu la r members 12 with corrugated insert members 13 placed in the interspaces.
  • zigzagged flow passages 14 are formed which are in fluid connection with flow passages 15 of a circular cross-section arranged in the valve body 4.
  • the fluid connection is preferably formed so that each flow passage 15 can end in two separate passages 14.
  • the mode of operation of the valve agrees with what is described for the first embodiment but enables to reach a still higher fall of pressure without any risk of cavitation.
  • valve assembly modifications of the valve assembly are possible within the scope of the inventive idea.
  • the number, size and location of the passages can for example be varied in different ways depending on which adjusting characteristic is desired.
  • the passages can further be made conical with a cross-section increasing towards the out let. - - - - - - - - - - - - - - - - - - - -

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Taps Or Cocks (AREA)
  • Multiple-Way Valves (AREA)
  • Details Of Valves (AREA)

Abstract

Valve assembly for adjusting a fluid flow comprising a housing (1) provided with an inlet (2) and an outlet (3) for fluid and a spherical body (4) rotatably arranged in the valve housing (1) between the in- and outlet (2, 3) and mounted sealingly against said valve housing (1), said valve body being provided with fluid flow passages (8-10; 14, 15), and an annular space (5) formed between said valve housing (1) and said valve body (4), said flow passages (8-10; 14, 15) ending in the space (5) when the valve is closed and in the in- and outlet (2, 3) when the valve is quite open. A reduced risk of cavitation and a high sound level in high pressure conditions is obtained by the invention.

Description

VALVE MEANS
This invention relates to a valve assembly comprising a housing provided with an inlet and an outlet for fluid and a spherical body rotatably arranged in the valve housing between the in- and outlet and mounted sealingly against said valve housing, said valve body being provided with fluid flow passages.
For adjusting a fluid flow conventional ball valves comprising two throttles in series with a fixed volume enclosed between said throttles have been found to be suitable. However, in high pressure conditions high flow rates are created at these throttles depending on small cross-sections of an inconsiderable extension in the direction of flow which may cause cavitation and a high sound level. The most critical movement in adjustment is when the first free cross-section, especially against the outlet side, opens. In this position the flow way made free should offer a great flow resistance also at small flowing amounts.
It is the object of the invention to provide a simple and, at the same time, efficient device for adjusting a fluid flow where disadvantages of cavitation and a high sound level are avoided. For this purpose a device having the characteristic features defined in the claims is suggested according to the invention.
The invention is described in greater detail in the form of non-limiting examples with reference to the enclosed drawings, wherein Fig. 1 shows a longitudinal section of a valve according to a first embodiment of the invention, Fig. 2 shows the valve body according to the section II - I I in Fig. 1, Fig. 3 shows a longitudinal section of the valve body with an opening angle α = 25°, Fig. 4 shows a section corresponding to Fig. 3 but with the opening angle (X = 45°, Fig. 5 shows also a section corresponding to Fig. 3 with the opening angleα = 56' Fig. 6 shows a section according to VI-VI in Fig. 7 of a second embodiment of the valve, and Fig. 7 shows the valve according to the section VII-VII in Fig. 6.
With reference to Fig. 1 the ball valve comprises a valve housing 1 provided with an inlet 2 and outlet 3 and a spherical valve body 4 rotatably arranged in the valve housing 1. The valve body 4 is sealingly mounted against an annular space 5 formed in the valve housing 1 by means of two valve seat rings 6. The valve seat rings 6 are fixedly connected to the valve housing 1 by their outer peripheries and have a clearance to the valve housing 1 at their inner peripheries in order to allow a resilient motion of the valve body 4.
The valve body 4 (Figs. 1, 2) is rotatable by means of a push rod (7) fixedly connected to the valve body 4 and is provided with two groups of passing flow passages 8, 9. The flow passages 8, 9 with circular cross-sections are preferably grooved in transversal direction, for example by threads. The groups of passages 8, 9 are arranged on both sides of the diametrical plane, the passages 8 having a smaller diameter than the passages 9. The valve body 4 further comprises two smooth flow passages 10 of a larger diameter arranged in said plane. When the valve is closed all the passages end in the space 5. On the other hand, at an open valve the passages end in the in- and outlet 2 , 3 , as is apparent from Fig. 1.
The mode of operation of the valve will be described in the following by the aid of Figs. 3-5, where Fig. 3 shows the valve body with the opening angle (α = 25°. In this case only a few number of passages 8 and 9, respectively, are opened. The substantial fluid flow way is marked by arrows. Thus, the fluid streams through a first throttle position in the form of passages 8 into the annular space 5 and around half the periphery in order to thereafter stream out through a second throttle in the form of passages 9. The passages 8 have a small diameter which causes a great flow resistance and consequently a great fall of pressure. The grooves of the passages cause a still more increased flow resistance and greater fall of pressure simultaneously with a lower flow rate. The above also applies to the passages 9, which, however, have a somewhat larger diameter in order to reduce the flow rate and the fall of pressure, the risk of cavitation being reduced.
Fig. 4 shows the valve body 4 with the opening angle (α = 45°, all the passages 8 being opened and ending in the inlet 2 and the space 5 and all the passages 9 also being opened but ending in the space 5 and the outlet 3. This means that a full flow with a maximum fall of pressure can pass the valve.
When the valve is opened more than 45° (Fig. 5) a part of the fluid can stream directly from the inlet to the outlet, this share of fluid increasing by increasing valve opening. At the same time the passages 10 are opened for a direct fluid flow from the inlet 2 to the outlet 3 which reduces the fall of pressure across the valve.
Thus, when the valve is opened from 0° to 45° the flow will increase to its maximum maintaining a high fall of pressure. With continued opening of the valve the fall of pressure is successively reduced to get down to a minimum at an opening of 90° when a direct flow is reached in all the passages.
In Figs. 6-7 another embodiment of the invention is shown where the valve body 4 is turned out and provided with a cylindrical insert 11. The insert 11 comprises a number of concentric, spaced apart, tubu la r members 12 with corrugated insert members 13 placed in the interspaces. In this way zigzagged flow passages 14 are formed which are in fluid connection with flow passages 15 of a circular cross-section arranged in the valve body 4. The fluid connection is preferably formed so that each flow passage 15 can end in two separate passages 14.
The mode of operation of the valve agrees with what is described for the first embodiment but enables to reach a still higher fall of pressure without any risk of cavitation.
Of course modifications of the valve assembly are possible within the scope of the inventive idea. Thus, the number, size and location of the passages can for example be varied in different ways depending on which adjusting characteristic is desired. The passages can further be made conical with a cross-section increasing towards the out let. - - - - - - - - - - - - - - -

Claims

1. Valve assembly comprising a housing (1) provided with an inlet (2) and an outlet (3) for fluid and a spherical body (4) rotatably arranged in the valve housing (1) between the in- and outlet (2, 3) and mounted εealingly against said valve housing (1), said valve body being provided with fluid flow passages (8-10; 14, 15), c h a r a c t e r i z e d by an annular space (5) formed between said valve housing (1) and said valve body (4), said flow passages (8-10; 14, 15) ending in the space (5) when the valve is closed and in the in- and outlet (2, 3) when the valve is quite open.
2. Assembly as claimed in claim 1, c h a r a c t e r i z e d in that the flow passages consist of first passages (8) arranged on one side of a plane in the axis of rotation and second passages (9) having a larger cross-section and arranged on the other side of the plane, said first passages (8) being opened to the space (5) and the inlet (2) when the valve is opened while the second passages (9) are opened to the space (5) and the outlet (3).
3. Assembly as claimed in claim 2, c h a r a c t e r i z e d in that the passages (8, 9) are grooved in the transversal direction in order to increase the flow resistance.
4. Assembly as claimed in claim 2, c h a r a c t e r i z e d in that the flow passages comprise two passages (10) having a substantially larger cross-section than the first and second passages (8, 9), said passages (10) being diametrically opposed in said plane.
5. Assembly as claimed in claim 1, c h a r a c t e r i z e d in that the valve body (4) has a cylindrical cavity provided with an insert (11) which comprises zigzagged passages (14) in fluid connection with passages (15) arranged in the valve body (4).
6. Assembly as claimed in claim 5, c h a r a c t e r i z e d in that the insert (11) consists of concentric, tubular, spaced apart members (12) with corrugated insert elements (13) placed in the interspaces. ---------------
PCT/SE1987/000054 1985-08-05 1987-02-05 Valve means WO1988005880A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP19870901700 EP0313552B1 (en) 1987-02-05 1987-02-05 Valve means
US07/204,428 US4889163A (en) 1987-02-05 1987-02-05 Valve assembly
AT87901700T ATE75014T1 (en) 1987-02-05 1987-02-05 VALVE UNIT.
DE8787901700T DE3778368D1 (en) 1987-02-05 1987-02-05 VALVE UNIT.
FI881750A FI89301C (en) 1987-02-05 1988-04-14 VENTILANORDNING
DK248588A DK167629B1 (en) 1987-02-05 1988-05-06 Ball bibcock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8503705A SE449031B (en) 1985-08-05 1985-08-05 Fluid flow control valve

Publications (1)

Publication Number Publication Date
WO1988005880A1 true WO1988005880A1 (en) 1988-08-11

Family

ID=20361029

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1987/000054 WO1988005880A1 (en) 1985-08-05 1987-02-05 Valve means

Country Status (2)

Country Link
SE (1) SE449031B (en)
WO (1) WO1988005880A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0325846A1 (en) * 1988-01-04 1989-08-02 Neles-Jamesbury Oy Closing member for a valve
EP0410081A1 (en) * 1989-07-28 1991-01-30 Red Valve Company, Inc. Pressure reducing valve
EP0438041A2 (en) * 1990-01-19 1991-07-24 Aktiebolaget Somas Ventiler Valve Device
FR2693248A1 (en) * 1992-07-03 1994-01-07 Roger Bey Ball or plug type valve fitted with an insert.
FR2697888A1 (en) * 1992-11-06 1994-05-13 Bey Roger Ball or plug control valve.
WO2000073685A1 (en) * 1999-06-01 2000-12-07 Naf Ab Device in a valve

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO177874C (en) * 1993-07-14 1996-10-30 Sinvent As Device for mixing the components in a fluid flow, and using the device in a mass flow meter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE858178C (en) * 1943-07-15 1952-12-04 Escher Wyss Maschinenfabrik Ag Tap or rotary valve, in particular with a spherical closure piece
EP0043188A1 (en) * 1980-06-27 1982-01-06 Neles-Jamesbury Oy Method of attenuating fluid flow passing through a valve and a valve therefor
EP0166375A2 (en) * 1984-06-28 1986-01-02 Ferdi W. Brücken A fluid valve
DE3526258A1 (en) * 1985-07-23 1987-01-29 Ruhrgas Ag SHUT-OFF VALVE IN THE FORM OF A BALL VALVE

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE858178C (en) * 1943-07-15 1952-12-04 Escher Wyss Maschinenfabrik Ag Tap or rotary valve, in particular with a spherical closure piece
EP0043188A1 (en) * 1980-06-27 1982-01-06 Neles-Jamesbury Oy Method of attenuating fluid flow passing through a valve and a valve therefor
FI65479B (en) * 1980-06-27 1984-01-31 Neles Oy PROCEDURE FOR DUMPING THROUGH A VALVE THROUGH MEDIUM FLOW AND VALVE FOR PERFORMING THE PROCEDURE
EP0166375A2 (en) * 1984-06-28 1986-01-02 Ferdi W. Brücken A fluid valve
DE3526258A1 (en) * 1985-07-23 1987-01-29 Ruhrgas Ag SHUT-OFF VALVE IN THE FORM OF A BALL VALVE

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0325846A1 (en) * 1988-01-04 1989-08-02 Neles-Jamesbury Oy Closing member for a valve
US5113909A (en) * 1988-01-04 1992-05-19 Neles Oy Closing member for a valve
EP0410081A1 (en) * 1989-07-28 1991-01-30 Red Valve Company, Inc. Pressure reducing valve
EP0438041A2 (en) * 1990-01-19 1991-07-24 Aktiebolaget Somas Ventiler Valve Device
EP0438041A3 (en) * 1990-01-19 1992-02-26 Aktiebolaget Somas Ventiler Valve device
WO1994001703A1 (en) * 1992-07-03 1994-01-20 Roger Bey Steel ball valve or parallel plug valve provided with an insert
FR2693248A1 (en) * 1992-07-03 1994-01-07 Roger Bey Ball or plug type valve fitted with an insert.
US5509446A (en) * 1992-07-03 1996-04-23 Rotatrol Ag Ball valve or plug valve provided with an insert
FR2697888A1 (en) * 1992-11-06 1994-05-13 Bey Roger Ball or plug control valve.
WO1994011659A1 (en) * 1992-11-06 1994-05-26 Rotatrol Ag Flow regulating valve of the ball or plug type
US5799695A (en) * 1992-11-06 1998-09-01 Neles-Jamesbury, Inc. Flow regulating valve of the ball or plug type
WO2000073685A1 (en) * 1999-06-01 2000-12-07 Naf Ab Device in a valve
US6520209B1 (en) 1999-06-01 2003-02-18 Naf Industries Ab Device in a valve
CZ296767B6 (en) * 1999-06-01 2006-06-14 Naf Ab Valve and method of controlling medium flow

Also Published As

Publication number Publication date
SE8503705L (en) 1987-02-06
SE449031B (en) 1987-03-30
SE8503705D0 (en) 1985-08-05

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