US3545721A - Welded ball valve and method of making - Google Patents

Welded ball valve and method of making Download PDF

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Publication number
US3545721A
US3545721A US680633A US3545721DA US3545721A US 3545721 A US3545721 A US 3545721A US 680633 A US680633 A US 680633A US 3545721D A US3545721D A US 3545721DA US 3545721 A US3545721 A US 3545721A
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United States
Prior art keywords
ball
welded
stem
seating
rings
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Expired - Lifetime
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US680633A
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English (en)
Inventor
Homer J Shafer
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.)
HOMER J SHAFER AS GRANTOR AND VIRGINIA E SHAFER JON L SHAFER AND HARRY C KOHLER TRUSTEES 2500 PARK AVENUE WEST MANSFIELD OHIO 44906
VIRGINIA E SHAFER JON L SHAFER AND HARRY C KOHLER AS TRUSTEES OF HOMER J SHAFER TRUST ESTABLISHED UNDER TRUST AGREEMENT DATED JUNE 8 1981
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Individual
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Publication of US3545721A publication Critical patent/US3545721A/en
Assigned to VIRGINIA E. SHAFER, JON L. SHAFER AND HARRY C. KOHLER, AS TRUSTEES OF THE HOMER J. SHAFER TRUST ESTABLISHED UNDER TRUST AGREEMENT DATED JUNE 8, 1981, HOMER J. SHAFER, AS GRANTOR, AND VIRGINIA E. SHAFER, JON L. SHAFER AND HARRY C. KOHLER, TRUSTEES, 2500 PARK AVENUE WEST, MANSFIELD, OHIO 44906 reassignment VIRGINIA E. SHAFER, JON L. SHAFER AND HARRY C. KOHLER, AS TRUSTEES OF THE HOMER J. SHAFER TRUST ESTABLISHED UNDER TRUST AGREEMENT DATED JUNE 8, 1981 ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ESTATE OF HOMER J. SHAFER, DECEASED, VIRGINIA E. SHAFER, CO-EXECUTOR, JON L. SHAFER, CO-EXECUTOR
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/10—Welded housings
    • F16K27/107—Welded housings for taps or cocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/0026—Arc welding or cutting specially adapted for particular articles or work

Definitions

  • ABSTRACT A ball valve structure comprising a valve ele- 251/315 ment having an integral stem and a surface formed spherically llll. CL
  • PATENTED mar 8 I970 SHEET 2 OF 8 INVENTOR.
  • a ball valve having an integral stem and .trunnion is ad vantageous because it can be cast or formed in one piece with the stern and trunnion accurately located on the axis of rotation at right angles to the flow axis, does not require the stem and trunnion to be accurately fitted into the ball, and the spherical surface of the ball can be accurately machines about the stem or rotating axis.
  • seals in:this construction are provided by seating rings abutting the spherical surface of the ball, which require a very expensive machining operation to obtain a highly polished sphericalsurfa'ce.
  • Another object is to providean improvedand economical welded ball valve construction and method of making the same.
  • a further object is to provide an improved welded ball valve construction having the stern bearing within the housing for absorbing stress directly with minimal bending moment on the stem.
  • a still further object is to provide an improved welded ball valve construction requiring a minimum amount of finish machining of the ball surface.
  • Still another object is to provide an improved welded ball construction having improved sealing means mounted on the ball and insertable and removable through the flowways of the housing.
  • ends of the body having flow tubes welded thereto with interior seating rings conforming to the valve element and abutting resilient sealing rings on the ball insertable through the flow tubes after welding and having radially outer annular legs abutting the seating rings at predetermined angles, the radially inner annular portions of said sealing rings being held by retaining means insertable through said flow tubes after weldmg.
  • FIG. 1 is a vertical sectionalview on .the flow axis of a preferred embodiment of the improved welded ball valve, showing the valve element in full closed position.
  • FIG. 3 is a horizontal sectional view on line 3-3 of FIG. 2.
  • FIG. 4 is an elevational view on a reduced scale, partly in section, of a cylindrical tube from which the valve body is formed.
  • FIG. 5 is a sectional view showing the manner of forming the cylindrical tube into a tube having an outwardly convex or domed wall.
  • FIG. 6 is a view showing the tube of FIG. 5 provided with two opposite bearing holes on an axis perpendicular to and intersecting the tube axis, and cut vertically along the tube axis to form two mating parts.
  • FIG. 7 is an exploded elevational view, partly in section, showing the manner of assembling the two parts of FIG. 6 around a ball valve element having integral axially alined stem and trunnion shafts with trunnions partly journaled thereon.
  • FIG. 8 is an exploded sectional view at right angles to FIG. 7, showing the flow tubes embodying seating ring assemblies in juxtaposition to the ends of abody part.
  • FIG. 9 is a plan view on line 9-9 of FIG. 8.
  • FIG. 10 is a partial sectional view on line 10-10 of FIG. 9.
  • FIG. 11 is an enlarged partial section of the seating ring assembly and ball showing the manner of holding a predetermined clearance during welding.
  • FIG. 12 is a similar view afterwelding with the sealing rings inserted.
  • the ball valve element indicated generally at 15 has a flowway 16, and axis of which in the full open position of FIG. 2 coincides with the flow axis of the valve bodyindicated generally at 17.
  • the flowway 16 is the same diameter as the flow ports 18 in the flow tubes 19 joined to the ends of the valve body 17, which ports are in turn the same diameter as the inner diameter of the pipe line in which the valve is connected, so that full flow through the valve is accomplished.
  • the body is formed of two mating halves 28a and 28b which are joined together by welding in a vertical plane extending longitudinally of the body and passing through the stem axis and the flow axis.
  • the joint between the two parts 28a and 28b is indicated at 29 in FIGS. 6 and 9, and the longitudinal weldment at the joint is indicated at 30 in FIGS. 1 and 2.
  • the weldment 30 connects with or intersects the circular weldments 31 and 32 between the body and the trunnion bearings 21 and 22, respectively, and also intersects the circular weldments 33 which connect the flow tubes 19 to the ends 34 of the body parts.
  • the total longitudinal weldment comprises the four short sections 30.
  • the flow tubes 19 have mounted in their inner ends seating ring assemblies each comprising a seating ring 36, having a spherical inner surface 37 for conforming to the spherical outer surface 38 on the ball 15, a backup ring 39, and spacing and retaining rings 40 and 41, as best seen in FIGS. 11 and 12.
  • the retaining ring 40 is preferably split or in removable sections, and the ring 41 is a split ring having overlapping ends.
  • the headless setscrew 42 secures the overlapping ends of ring 41 to one of the sections of ring 40.
  • the ring 44 is an asbestos wiper ring.
  • the flow tubes 19 may be welded to thevalve body with the seating ring assemblies in position without the O-ring 44, and with plastic shim material 45 between the seating rings and the ball to establish a predetermined clearance there between, as shown in FIG. 11.
  • the shim material may be plastic sheet material such as a tetrafluorocarbon material known as TEFLON which will withstand welding heat. After the welding operation, the plastic shim material 45 is removed and the O-ring 43 inserted in the manner previously described. Obviously, the asbestos wiper ring is not affected by the heat of welding. The parts are then in the position of FIG. 12.
  • the ball is provided on its closed sides with annular grooves 47 to receive and mount annular sealing rings 48 in the ball.
  • the sealing rings 48 are preferably of suitably soft elastomeric rubber or plastic material.
  • the grooves 47 preferably extend radially partially under the seating rings 36 and partially within the flow ports 18, so that the sealing rings can be inserted and removed through the flow tubes.
  • the annular grooves 47 merge into radially inner annular grooves 49 for receiving retaining rings 50 which overlap the sealing rings 48 and extend radially under the seating rings 36 at a slight clearance therefrom equivalent to the clearance between the spherical surfaces 37 and 38 on the seating rings and the ball, respectively.
  • Such clearance may be on the order of to thousandths of an inch.
  • the retaining rings 50 are made in three or more abutting sections held in place by screws 51 so that they can be inserted or removed through the flow ports when the sealing rings 48 are inserted or removed.
  • the design of the sealing rings 48 is substantially V-shaped or chevron-shaped in cross section, with the outer annular leg 52 confined and directed by the outer annular wall 53 of groove 47 in a direction parallel to the flow axis of the valve, and at substantially 45 to the seating surface 37 of seating ring 36.
  • the annular gripping flange 54 of retaining ring 50 engages in an annular groove formed medially in sealing ring 48, and provides a limited amount of flexing space between the flange 54 and the leg 52 ofthe sealing ring, as indicated at 55.
  • leg 52 seals against seating surface 37 when the line pressure is acting toward the grooved side of the sealing ring 48, and flexes in space 55 to relieve cavity pres sure when the pressure is in the opposite direction.
  • the amount of flexing space is much less than in prior constructions where the sealing leg was directed substantially perpendicularly to the seating surface, so that the sealing leg flexes only a minimal amount when breaking away from the seating surface 37 during opening and closing of the valve and thus greatly reduces wear on the ring, and enables'using a relatively soft material for the sealing rings which'gives a tighter seal against the ball surface than a harder material.
  • the sealing ring on the pressure side is subjected to the greatest wear as it starts to move over the seating surface during'opening and closing, because the line pressure tends to bulge the sealing leg 52 out from its supporting wall 53.
  • the present construction provides for minimal wear on the sealing leg as it comes across the seating surface because the leg is fullysupported or backed-up by the wall 53 except at the very tip of the sealing leg which is exposed.
  • the ends of the stern shaft 20 and trunnion shaft 22 are provided with centering recesses which are used to chuck the ball for .machining the spherical surfaces 18 thereon about the rotating axis of the ball.
  • This provides for simply and accurately obtaining a truly spherical surface on the ball, as distinguished from the prior practice of using the ends of the ball flowway 16 to chuck the ball for the machining operation.
  • the use of the plastic shim material 45 to provide a predetermined clearance between the ball surface and the seating surfaces allows the use of spherical surfaces on the ball which do not need to be highly polished, as is the case where the metal ball surface contacts a metal seating surface.
  • the ball is provided on its closed sides 55 with guide ribs 56, which are machines to have spherical outer surfaces at the same time that the spherical surface 38 are machined.
  • the next step is to radially outwardly bulge the cylinder wall to form a tubular convexly bulged housing indicated as a whole at 62.
  • This may be done, as shown in FIG. 5, by hot rolling the cylinder between an inner convex roller 63 and outer tapered supporting rollers 64 at the ends of the cylinder.
  • the wall of tube 60 is thus bowed outwardly between the ends while drawing the ends slightly inwardly to form the convexly bulged tube 62 having a wall 65 of substantially uniform thickness with opposite ends 34.
  • the ball is rotated to the fully open position to facilitate removing the shim materiaL'and then rotated back to closed position, and the sealing rings 48, retainer rings 50 and O-rings' 43 inserted through the flow ports 18 into position.
  • a ball valve structure having a ball valve element and a surrounding completely welded tubular body having a longitudinal flowway, said valve element having a flowway and a transversely aligned stem, a bearing around said stem mounting the valve for rotation between flowway opening and closing positions, flow tubes welded to the ends of said tubular body and having inner diameters equal to the diameter of the flowway in the ball valve elem'en't', said body comprising solely two domed parts having longitudinal edges welded together in a plane, said body flowway axis and saidstem axis lying in said plane said stem bearing extending inwardly of the body and being located wholly within and welded to said body.
  • a ball valve structure as defined in claim I in which the ball valve element has a transversely alined integral stem and trunnion, and bearings around said stem and trunnion extend ing inwardly of the body and located wholly within and welded to said body,
  • a ball valve structure having a ball valve element and a surrounding completely welded tubular body having a longitudinal flowway, said valve element having a flowway and a transversely aligned stem, a bearing around said stem mounting the valve for rotation between flowway opening and closing positions, the surface of the valve element adjacent to the stem bearing being somewhat flattened, flow tubes welded to the ends of said tubular body and having inner diameters equal to the diameter of the flowway in the ball valve element, said body comprising solely two domed parts having longitudinal edges welded together in a plane, said body flowway axis and said stem axis lying in said plane, said stem bearing extending inwardly of the body toward said flattened surface of the valve element and being located wholly within and welded to said body.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Taps Or Cocks (AREA)
  • Valve Housings (AREA)
US680633A 1967-11-06 1967-11-06 Welded ball valve and method of making Expired - Lifetime US3545721A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US68063367A 1967-11-06 1967-11-06

Publications (1)

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US3545721A true US3545721A (en) 1970-12-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
US680633A Expired - Lifetime US3545721A (en) 1967-11-06 1967-11-06 Welded ball valve and method of making

Country Status (6)

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US (1) US3545721A (de)
BR (1) BR6803680D0 (de)
DE (1) DE1807833A1 (de)
FR (1) FR1590830A (de)
GB (1) GB1234195A (de)
NL (1) NL155344B (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3732885A (en) * 1971-09-29 1973-05-15 H Allen Valve and method of assembling same
US3737145A (en) * 1971-08-02 1973-06-05 Walworth Co Fabricated valve ball
US3777342A (en) * 1971-09-29 1973-12-11 Cameron Iron Works Inc Method of assembling valve
US3792835A (en) * 1972-06-08 1974-02-19 H Shafer Trunnion type rotary valve of welded tube and plate construction
US4326697A (en) * 1968-11-15 1982-04-27 Roger Autage Valves with non-lubricated plug
US4635675A (en) * 1981-10-15 1987-01-13 Crosby Valve & Gage Company Flat sided ball valve
US4844413A (en) * 1984-08-20 1989-07-04 The Babcock & Wilcox Company Shut-off/equalizing valve with molded seals
US5332193A (en) * 1992-11-27 1994-07-26 Giacomini Industriale, S.P.A. Ball valve with sealing means for the closure part
US5890286A (en) * 1994-08-17 1999-04-06 Naval Oy Ball valve with full opening and a method for its manufacture
US6178638B1 (en) * 1999-03-22 2001-01-30 Lei-Jui Wu Fabrication method for a flange-type ball valve
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
US20080105845A1 (en) * 2006-11-07 2008-05-08 Yeary & Associates, Inc. Ball valve with flow-through feature
CN105715820A (zh) * 2016-04-28 2016-06-29 苏州纽威阀门股份有限公司 球阀
RU2680533C1 (ru) * 2018-03-01 2019-02-22 Дмитрий Олегович Левин Шаровой кран и способ его изготовления
US11041574B2 (en) * 2019-03-12 2021-06-22 Hs Valve Co., Ltd. Jig for assembling fully welded ball valve

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2468048A1 (fr) * 1979-10-23 1981-04-30 Gachot Jean Robinet ou analogue et procedes de fabrication s'y rapportant
DE9213013U1 (de) * 1992-09-26 1992-11-26 Cerpraecis Anwendungen für Ingenieurkeramik GmbH, 4650 Gelsenkirchen Absperrorgan zum Einbau in Rohrleitungen

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4326697A (en) * 1968-11-15 1982-04-27 Roger Autage Valves with non-lubricated plug
US3737145A (en) * 1971-08-02 1973-06-05 Walworth Co Fabricated valve ball
US3732885A (en) * 1971-09-29 1973-05-15 H Allen Valve and method of assembling same
US3777342A (en) * 1971-09-29 1973-12-11 Cameron Iron Works Inc Method of assembling valve
US3792835A (en) * 1972-06-08 1974-02-19 H Shafer Trunnion type rotary valve of welded tube and plate construction
US4635675A (en) * 1981-10-15 1987-01-13 Crosby Valve & Gage Company Flat sided ball valve
US4844413A (en) * 1984-08-20 1989-07-04 The Babcock & Wilcox Company Shut-off/equalizing valve with molded seals
US5332193A (en) * 1992-11-27 1994-07-26 Giacomini Industriale, S.P.A. Ball valve with sealing means for the closure part
US5890286A (en) * 1994-08-17 1999-04-06 Naval Oy Ball valve with full opening and a method for its manufacture
US6178638B1 (en) * 1999-03-22 2001-01-30 Lei-Jui Wu Fabrication method for a flange-type ball valve
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
US20080105845A1 (en) * 2006-11-07 2008-05-08 Yeary & Associates, Inc. Ball valve with flow-through feature
CN105715820A (zh) * 2016-04-28 2016-06-29 苏州纽威阀门股份有限公司 球阀
RU2680533C1 (ru) * 2018-03-01 2019-02-22 Дмитрий Олегович Левин Шаровой кран и способ его изготовления
US11041574B2 (en) * 2019-03-12 2021-06-22 Hs Valve Co., Ltd. Jig for assembling fully welded ball valve

Also Published As

Publication number Publication date
DE1807833A1 (de) 1969-06-26
FR1590830A (de) 1970-04-20
NL6815772A (de) 1969-05-08
GB1234195A (de) 1971-06-03
BR6803680D0 (pt) 1973-04-12
NL155344B (nl) 1977-12-15

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Legal Events

Date Code Title Description
AS Assignment

Owner name: HOMER J. SHAFER, AS GRANTOR, AND VIRGINIA E. SHAFE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ESTATE OF HOMER J. SHAFER, DECEASED, VIRGINIA E. SHAFER,CO-EXECUTOR, JON L. SHAFER, CO-EXECUTOR;REEL/FRAME:004739/0852

Effective date: 19841214

Owner name: VIRGINIA E. SHAFER, JON L. SHAFER AND HARRY C. KOH

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ESTATE OF HOMER J. SHAFER, DECEASED, VIRGINIA E. SHAFER,CO-EXECUTOR, JON L. SHAFER, CO-EXECUTOR;REEL/FRAME:004739/0852

Effective date: 19841214