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
  • F16K27/00—Construction of housing; Use of materials therefor
  • F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
  • F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
• • 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

Definitions

• the present invention concerns a valve of the type comprising a rotatable valve member, such as ball valves or cocks, and of the type which compris ⁇ es a valve casing provided with at least two for external connections defined openings and an opening provided with a turnable shaft which serves to turn a valve element which is carried rotatably and being rotatable around a ro ⁇ tation axis establishing at least one closing and one open position of the valve forwhich purpose the valve element comprises at least one equatorial area having at least one bore and being successively led past a sealing ring positioned at one of the connectable openings of the valve casing when turn- ing the valve element around its rotation axis.
• the valve according to the present invention is characterized in that the valve element at the clos ⁇ ed position of the valve is lying tight against the sealing ring along a ring shaped contact area position- ed longer away from the rotation axis of the valve ele ⁇ ment than is the case for the surface of the valve element at other places ' of the equatorial area or zone.
• the contacting pressure against the sealing rings at the closed condition of the valve may due to the construc- tional features of the valve be much higher than the contacting pressure within valves belonging to the state of the art in which the contacting pressure has such a size that to the carrying out of the closing of the valve a turning force of maximum 75 N m has to be exerted, whereas in case of the present valve a sealing contacting pressure is obtainable whereto a turning force of the size of 350 N has to be exerted upon the turnable shaft of the valve, i.e. corresponding to a sealing pressure which is about five times larger than until now obtained by means of the known ball valves or cocks.
• Each equatorial zone section incorporating the mentioned larger distance from the centre of the valve element or from the rotation axis is appropriately manufactured wider than the largest diameter of the contacting face of the sealing ring with the valve element. In this way it is ensured that the total contacting surface of the sealing ring obtains equal sealing pressure or contacting pressure against the valve element at the closed condition of the valve.
• valve element is of the cock type having a cylindrically or conically shaped valve element
• the equatorial area f the valve element i.e. the aforemen- tioned area, which at the turning operation of the valve passes the contacting area of the sealing ring
• the equatorial area of the valve element is composed of in pairs oppositely arranged ball surface sections having the same curvature of the surface, whereby simultaneous ⁇ ly at least one pair of the said oppositely arranged ball surface sections possess the same centre and pos ⁇ sess a larger distance to the centre of the ball than it is the case for the remaining pairs of ball surface sections.
• a pre ⁇ ferred embodiment for a modified ball valve is defined since only a part of the equatorial zone of the valve element needs to have its centre at the rota ⁇ tion axis of the valve.
• the pair of ball shaped, conical or cylindrical surface sections comprising no bores suitably exhibit on the valve element the largest distance to the centre of the ball or to the axis of the valve element, where ⁇ by simultaneously each surface section having a bore exhibits a shorter' distance to the centre of the ball or to the axis of the valve element.
• Fig. 1 illustrates a valve element construed ac- cording to the present invention.
• Fig. 2 illustrates a side view of the element shown in fig. 1
• Fig. 3 illustrates a front view of the element shown in fig. 1
• Fig. 4 shows a modified embodiment but viewed in cross section along I-I in fig. 3
• Fig. 5 shows a cross section along II-II in fig. 3
• Fig. 6 illustrates an embodiment having plane sur ⁇ faces at the bore
• Fig. 7 illustrates a sealing ring.
• valve element has a bore 2 with an orifice lying at a ball surface section 3 having a shorterdistance io .the centre of the ball than a ball surface section 4 having no bore orifices.
• Uppermost the valve element comprises a surface 5 in the middle of which a box shaped projection is present de ⁇ fined to engage a turnable valve shaft (not shown) pa ⁇ - sing through the valve casing (not shown) whereby the turnable valve shaft at the coupling end unto the valve element possesses a notch being complementary to the projection 6.
• valve element In fig. 2 of the accompanying drawings the same valve element is shown viewed from the side and having rounded shaped transition faces between the surface parts 3 and 4.
• This valve is of the one-way valve type having one single bore in the valve element; but accord ⁇ ing to the present invention the valve might be of the two-way and three-way valve types comprising valves of the cock type as well as of the ball type.
• the valve element 1 is turnable around a rotation axis 7, and the ball surface 4 has its centre common with the cen ⁇ tre 8 of the valve element. In the present case the centre of the ball is situated at the intersection point between the rotation axis 7 and the axis 9 of the bore 2.
• the centre of the ball In fig.
• the equatorial zone or area 10 of the valve element is shown, namely the .zone or area, which at the turning of the valve element 1 successively is led past a sealing ring in the valve casing.
• An embodi- ment of a sealing ring 12 is shown in fig. 7 whereby the contacting area 14 of the sealing ring serving for the tightening against the valve element when occupying closed position is shown having an oblique position in relation to the plane of the sealing ring.
• An internal projection 16 manufactured on the sealing ring has in prac ⁇ tice shown itself to be able to remove noise of the valve in its open position at those embodi ⁇ ments of the valve element in which the surface 3 also is brought into contact with the gasket ring 12 even through the contacting pressure is lower.
• FIG. 4 A cross sectional view along I-I of fig. 3 is shown in fig. 4 of the accompanying drawings, namely in an embodiment in which the projection6 is substituted by a notch 18 arranged to engage the turnable. valve shaft.
• the usual cross sectional contour 20 for a usual ball valve is shown, hereby it is made easier understandable why the valve element 1 accord- ing to the present invention forms a lower contacting pressure with the sealing rings 12 of the valve casing whenever the open valve condition is present contrary to the case in which the valve is in closed condition.
• a cross sectional view through the valve element 1 within the equatorial area 10 along II-II in fig. 3 is shown in fig. 5 of the accompanying drawings.
• valve element 1 By means of a dot-and-dash line 22 the orbit of the valve element 1 for the ball surface section 4 is indicated.
• An embodiment for the valve element 1 is shown in fig. 6 of the accompanying drawings and whereby only the opposite surface sections 4 are ball shaped exhibiting rounded shaped transitions to plane shaped surfa ⁇ ces 26 in which the bore 2 of the valve element opens out and whereby a surface 24, opposite to the surface 5, also has a plane shape.
• the distance between the sur ⁇ faces 5 and 24 corresponds to the width of the equato ⁇ rial area 10. In this way a valve casing with low con ⁇ struction height can be obtained and in which case also all advantages according to the present invention are employed.
• the rounded shaped transitions to the surfaces 26 cause less wear upon the sealing ring 12 than the bore orifices in"a ball shaped valve element.
• at least one surface section without bores should be present in the equatorial area of said valve element 1 , said surface section having a larger width measured along the periphery of the valve element l by the equatorial area 10 than the largest diameter of the sealing ring 12 for its contact area 14 with the val-
• the contact area 14 is smaller than the surface section without bores.
• the connectable open ⁇ ings of the valve casing which openings might be dosed by the surface sections being without bores on the valve element 1 are all situated, radially facing the equatori ⁇ al zone or area 10; but the valve casing may comprise other connectable openings, one of which e.g. could be arranged opposite the opening in the valve casing for the valve shaft.

Landscapes

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=8139009

Family Applications (1)

Country Status (13)

Family Cites Families (2)

• 1981
  • 1981-11-16 DK DK505081A patent/DK147516C/da not_active IP Right Cessation
• 1982
  • 1982-11-15 IT IT24263/82A patent/IT1195959B/it active
  • 1982-11-15 DE DE19823249206 patent/DE3249206T1/de not_active Withdrawn
  • 1982-11-15 FR FR8219101A patent/FR2516627B1/fr not_active Expired
  • 1982-11-15 GB GB08318685A patent/GB2123120B/en not_active Expired
  • 1982-11-15 JP JP82503332A patent/JPS58501916A/ja active Pending
  • 1982-11-15 NL NL8220412A patent/NL8220412A/nl unknown
  • 1982-11-15 WO PCT/DK1982/000102 patent/WO1983001822A1/en active IP Right Grant
  • 1982-11-15 EP EP82903310A patent/EP0098268A1/en not_active Withdrawn
  • 1982-11-16 BE BE0/209474A patent/BE895014A/fr not_active IP Right Cessation
• 1983
  • 1983-07-12 SE SE8303953A patent/SE439971B/sv not_active IP Right Cessation
  • 1983-07-12 NO NO83832537A patent/NO158356C/no unknown
  • 1983-07-12 FI FI832529A patent/FI74335C/fi not_active IP Right Cessation

Non-Patent Citations (1)

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