US3578289A - Spherical valve plug - Google Patents

Spherical valve plug Download PDF

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Publication number
US3578289A
US3578289A US794595*A US3578289DA US3578289A US 3578289 A US3578289 A US 3578289A US 3578289D A US3578289D A US 3578289DA US 3578289 A US3578289 A US 3578289A
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United States
Prior art keywords
spherical
plug
housing
pair
circular
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Expired - Lifetime
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US794595*A
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English (en)
Inventor
Max Thevignot
Robert M Schweblen
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THEVIGNOT ETS
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THEVIGNOT ETS
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    • 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

  • blowholes, etc. it is necessary to replace metal after having made a'local cavity and then to rework the part on the lathe. Butit is still not certain that the part will be fluidtight and a test loading will often enough cause the rejection of parts on which considerable amount of utterly wasted handwork has been expended; this is translated into a serious increase in the cost price of those parts which do pass the test.
  • the invention has for its object spherical plugs for cocks and a process for making them in which the difficulties laid out above are avoided or diminished in their effect.
  • a spherical plug including two similar hemispherical cheeks in sheet steel with their edges defined by portions of a great circle and by a half small circle with an axis perpendicular to that of the great circle, the said cheeks being assembled together by welding along their great circle so as to form a spherical surface cut into by a pair of coaxial spherical segments of which the axis is in the plane of the great circle, and a cylindrical conduit in rolled steel coaxial with the axis of the said segof the said spherical segments to form a through-passage of the plug.
  • a spherical plug has two substantially hemispherical cheeks in sheet steel material assembled so as to form a spherical surface cut out in the form of four spherical segments diametrically opposed two by two and forming a first pair and a second-pair, the diametrical axes of the two pairs being perpendicular, the said cheeks being welded one to the other along four weld lines on a great circle of the said spherical surface, by a cylindrical conduit in rolled steel placed along the diameter of the spherical surface which corresponds to the axis of the first pair, the said conduit being welded to the said spherical surface at the edges of the two spherical segments of the first pair and beingcontinuous between them; at the spherical segments of the second pair a bush is welded on to the said cylindrical conduit and at the other spherical segment of the second pair another bush is welded on to the said cylindrical conduit
  • the process of manufacture according to the invention includes all the following steps 1 to 5i 1. cutting out in a sheet of steel two identical blanks of generally quadrangular shape of which the outline is defined by two arcs of a first pair of circles, outside each other and centered on one axis, two arcs of a second pair of circles, outside each other and centered on an axis perpendicular to that of the first pair and four straight edges joining the ends of the arcs of the circles and parallel two by two; I p
  • the process may include the subsequent steps of:
  • the quantities D, d, L, H are chosen so that the ratio D:d is about 1.50:1, the ratio Lzd is about 1.20:1, and so ments, the said cylindrical conduit being welded to the edges that the ratio Hzd is about 1.20:1.
  • FIG. 1 represents a blank cutout of a rolled steel sheet
  • FIG. 2 shows, before assembly, in perspective view the parts making up a spherical plug
  • FIG. 3 shows a plug in section, the right-hand half before reaming and machining, the left-hand half after reaming and machining, and
  • FIG. 4 shows a finished plug
  • FIG. I there is shown a blank 1 obtained by cutting out (for example, by flame cutting) in a sheet of rolled steel to a particular shape; this shape is defined by two arcs of circles II and 12, their centers lying on an axis I6, and the two circles being outside. each other, two arcs of circle 14 and I5, their centers lying on an axis 13 perpendicular to the axis 16 and the circles being outside each other, and four straight edges 17, I7 I8, 18 joining the arcs; two opposite edges such as 17 and 17 being parallel and substantially perpendicular to the diagonal which communicates with them; in other words, the edges 17 and 17 have a common bisector.
  • the blank I of FIG. I is to be die-formed, e.g. by stamping and hot-forging between a die and a spherical punch to take the spherical shape; the shape of the blank is'chosen so that, after stamping: the four formerly straight edges I7, 17', I8, 18, form substantially four sectors of the same great circle of a sphere;
  • the two arcs l1 and 12 on the one hand, 14 and IS on the other hand form each substantially a half small circle of the same sphere, the two first arcs forming one pair of equal half small circles parallel to each other and perpendicular to the great circle formed by the sectors I7, l7, 18, 18', the other two of these arcs forming a pair of equal half small circles parallel to each other and perpendicular at the same time to the former half small circles and to the said great circle.
  • the shape of the blank I in FIG. I is chosen so that when it leaves the press the blank 1 takes the general shape of the hemispherical cheek shown at l in FIG. 2.
  • FIG. 2 there is shown a portion of circular cylindrical tube 3 likewise of steel but thicker than the checks 1 and 2.
  • This tubular element has a length slightly less than the distance L between the planes of the half circles I1 and 12 (or 21 and 22) and its internal diameter d is slightly greater than that of these four semicircles.
  • FIG. 2 there are also shown two parts 4 and 5 destined to form bushes. These are parts of full cylinders defined on one side by a straight cut such as 51 and on the other side by a cylindrical surface 52 having the same radius as the tube 3.
  • FIG. 3 in section
  • FIG. 3 corresponds to a section taken through the great circle 19 when this has been brought into contact with the great circle 29, that is to say, it is a section through the vertical plane passing through the axis 31 of the tube 3', this section is seen from the right referred to in FIG. 2.
  • the inside of the side of the tube 3 which is within the hemispherical cheek l and a small part of the interior surface of this cheek are visible.
  • the tubular element 3 is arranged on a jig, the axis of the element being at 31 and about this element the hemispherical checks 1 and 2 are positioned; check 1 only is seen partially in FIG. 3 in its part-finished state, particularly the sectors 17 and 18 of the great circle and its half small cir-' sphere formed by the two hemispherical cheeks, the two checks are fixed onto the tubular element 3.
  • the weld seam 32 is shown in section at I32.
  • the cheeks l and 2 are also fastened one to the other by means of four weld seams between the sectors 17 and 27', 17 and 27, 18' and 28, and 18 and 28, respectively. These are made in one or more operations. Because of the section taken, these weld seams are not visible on FIG. 3 but are shown in FIG. 4.
  • Part 4 is destined to serve as a guide journal and there is drilled into it a centering hole 44 (seen in the left-hand part of FIG. 3).
  • Part 5 destined to act as a drive journal receives two blind threaded holes one of which is visible at 54, and a housing 55 (best seen from FIG. 4) to drive the journal in known manner.
  • the blind threaded holes allow for the screwing in of threaded eyes for the handling of the plug.
  • the part thus made up has the general appearance shown in FIG. 4. It is a truncated sphere of which the diameter is D and of which the height is H (see FIGS. 2 and 3). It is crossed by a conduit of interior diameter d and having a total length L (external measurement). These four quantities are preferably linked in the three relationships indicated above.
  • This made-up part is commonly quite heavy. After having screwed the threaded eyes into the blind threaded holes of the part 5, which allows for the handling of the part by mechanical means, one withdraws it from the jig and one places it on a reamer in order to ream out the inside of the cylinder 3; on the left-hand side of FIG. 3 the dotted line 33 represents the measurement before reaming and the line 34 shows the measurement after reaming.
  • the weld line 35 which is similar to the line 32 is thinned; the part 118 of the check 1 goes, which causes the circular sector 18' to be cut in a bevel (as shown in FIG. 4).
  • a spherical plug is obtained which is lighter and more resistant than those in cast steel, and more resistant also than previous spherical plugs made from strip steel; this process is also suitable for the manufacture of large-sized plugs.
  • a plug embodying the invention is in closed position in a cock, the conduit 3 is perpendicular to, the principal pipe and the great circle 19 is placed transversely.
  • the fluid blocked by the closure of the cock exerts its pressure on whichever of the checks 1 or 2 which blocks it, and this pressure tends to press the cheek towards one another; it therefore does not make the welds work which join these cheeks together.
  • the surface of the plug which acts is all of a piece, without weld, and it is 1 made up of rolled steel which can have been checked, before stamping. to be perfectly sound.
  • a spherical plug for a ball valve comprising a truncated hollow spherical housing having an inlet and an outlet arranged along a common longitudinal axis, said housing including a pair of similar hemispherical cheeks made of sheet steel of substantially constant thickness, assembled to form the spherical surface and cutout in the form of four spherical segmerits diametrically opposed two by two and forming a first pair and a second pair, the diametrical axis of the two pairs being perpendicular,
  • said housing in its assembled form being limited by said pairs of symmetrical circular edges, and an inner cylindrical conduit made of rolled steel coaxial with said circular edges and being disposed on said longitudinal axis within said spherical housing, said cylindrical conduit being provided with two plane ends and assembled within said spherical housing by circular weld lines wherein the circular edges of said housing overlap the plane ends of said cylindrical conduit and whereby a lightweight watertight plug is formed.
  • said circular weld lines are laid upon the inner face of said spherical housing.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Valve Housings (AREA)
  • Lift Valve (AREA)
  • Taps Or Cocks (AREA)
  • Pipe Accessories (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US794595*A 1968-01-30 1969-01-28 Spherical valve plug Expired - Lifetime US3578289A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR21000881 1968-01-30

Publications (1)

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US3578289A true US3578289A (en) 1971-05-11

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ID=9683744

Family Applications (1)

Application Number Title Priority Date Filing Date
US794595*A Expired - Lifetime US3578289A (en) 1968-01-30 1969-01-28 Spherical valve plug

Country Status (3)

Country Link
US (1) US3578289A (enrdf_load_stackoverflow)
FR (1) FR1563046A (enrdf_load_stackoverflow)
GB (1) GB1224602A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1359354A3 (de) * 2002-05-02 2003-12-10 Klinger AG Kugel für einen Kugelhahn
US6773678B2 (en) 2000-03-20 2004-08-10 Endress + Hauser Conducta Gesellschaft Fur Mess Und Regeltechnik Mbh + Co. Mounting system and retractable sensor holder for analytical sensors
USD621913S1 (en) * 2006-10-27 2010-08-17 Burrow Industries, Inc. Feed tube
US7850143B1 (en) 2008-04-10 2010-12-14 Ggosco Engineering Inc. Ball valve assembly
US9581253B2 (en) 2015-02-12 2017-02-28 Valve Innovations, Llc Valve member for a floating ball valve
CN106704627A (zh) * 2017-02-08 2017-05-24 江苏神通阀门股份有限公司 球阀的对分球体的加工方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2315649A1 (fr) * 1975-06-27 1977-01-21 Provence Const Met Robinets a boisseau tournant perfectionnes
GB2332501A (en) * 1997-12-22 1999-06-23 Huang Hung Chang Improved ball-type valve
US6471183B2 (en) * 1998-08-19 2002-10-29 Bogdan Roszkowski Ball valve
RU2230964C2 (ru) * 2002-07-29 2004-06-20 Общество с ограниченной ответственностью фирма "АКТАН" Шаровой кран
RU2247002C2 (ru) * 2002-07-30 2005-02-27 Российский федеральный ядерный центр - Всероссийский научно-исследовательский институт экспериментальной физики - РФЯЦ-ВНИИЭФ Способ изготовления полусферических оболочек из металлов

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB406660A (en) * 1932-08-29 1934-02-28 Robert Allen Improvements in or relating to ball valve members for use with rotary ball valves
US3246873A (en) * 1964-02-12 1966-04-19 Alvin L Johnson Ball for valves
US3339259A (en) * 1964-08-21 1967-09-05 Alvin L Johnson Ball construction for ball valves
US3463450A (en) * 1967-08-25 1969-08-26 Acf Ind Inc Fabricated plug for spherical plug valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB406660A (en) * 1932-08-29 1934-02-28 Robert Allen Improvements in or relating to ball valve members for use with rotary ball valves
US3246873A (en) * 1964-02-12 1966-04-19 Alvin L Johnson Ball for valves
US3339259A (en) * 1964-08-21 1967-09-05 Alvin L Johnson Ball construction for ball valves
US3463450A (en) * 1967-08-25 1969-08-26 Acf Ind Inc Fabricated plug for spherical plug valve

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6773678B2 (en) 2000-03-20 2004-08-10 Endress + Hauser Conducta Gesellschaft Fur Mess Und Regeltechnik Mbh + Co. Mounting system and retractable sensor holder for analytical sensors
EP1359354A3 (de) * 2002-05-02 2003-12-10 Klinger AG Kugel für einen Kugelhahn
USD621913S1 (en) * 2006-10-27 2010-08-17 Burrow Industries, Inc. Feed tube
US7850143B1 (en) 2008-04-10 2010-12-14 Ggosco Engineering Inc. Ball valve assembly
US9581253B2 (en) 2015-02-12 2017-02-28 Valve Innovations, Llc Valve member for a floating ball valve
CN106704627A (zh) * 2017-02-08 2017-05-24 江苏神通阀门股份有限公司 球阀的对分球体的加工方法
CN106704627B (zh) * 2017-02-08 2019-03-15 江苏神通阀门股份有限公司 球阀的对分球体的加工方法

Also Published As

Publication number Publication date
DE1814881A1 (de) 1969-08-07
FR1563046A (enrdf_load_stackoverflow) 1969-04-11
GB1224602A (en) 1971-03-10
DE1814881B2 (de) 1972-11-09

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