US3313318A - Sequentially operated plural valves for vacuum casting apparatus - Google Patents

Sequentially operated plural valves for vacuum casting apparatus Download PDF

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Publication number
US3313318A
US3313318A US339437A US33943764A US3313318A US 3313318 A US3313318 A US 3313318A US 339437 A US339437 A US 339437A US 33943764 A US33943764 A US 33943764A US 3313318 A US3313318 A US 3313318A
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US
United States
Prior art keywords
valve
cylinder
plate
axially
annular
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.)
Expired - Lifetime
Application number
US339437A
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English (en)
Inventor
Richard E Lyman
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.)
United States Steel Corp
Original Assignee
United States Steel Corp
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 United States Steel Corp filed Critical United States Steel Corp
Priority to US339437A priority Critical patent/US3313318A/en
Priority to GB2169/65A priority patent/GB1082041A/en
Priority to FR2424A priority patent/FR1421088A/fr
Priority to DE19651500283 priority patent/DE1500283A1/de
Priority to ES0308380A priority patent/ES308380A1/es
Priority to BE658735A priority patent/BE658735A/xx
Priority to NL6500852A priority patent/NL6500852A/xx
Priority to AT54565A priority patent/AT249284B/de
Application granted granted Critical
Publication of US3313318A publication Critical patent/US3313318A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
    • F16K51/02—Other details not peculiar to particular types of valves or cut-off apparatus specially adapted for high-vacuum installations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould
    • 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
    • F16K1/00—Lift 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
    • F16K1/24—Lift 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 with valve members that, on opening of the valve, are initially lifted from the seat and next are turned around an axis parallel to the seat
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/46—Mechanical actuating means for remote operation
    • F16K31/465—Mechanical actuating means for remote operation by flexible transmission means, e.g. cable, chain, bowden wire
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7504—Removable valve head and seat unit
    • Y10T137/7668—Retained by bonnet or closure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86928—Sequentially progressive opening or closing of plural valves
    • Y10T137/86936—Pressure equalizing or auxiliary shunt flow
    • Y10T137/86944—One valve seats against other valve [e.g., concentric valves]
    • Y10T137/86984—Actuator moves both valves

Definitions

  • This invention relates to apparatus for casting metal in vacuum and, more particularly, to valve mechanism for controlling the connection between a vacuum line and the casting chamber.
  • the valve mechanism for this purpose is constructed in the form of a cartridge to facilitate its removal and replacement as a unit in the vacuum line for cleaning or repair.
  • Vacuum pumps for withdrawing air and gas from casting chambers in vacuum casting systems have load-pressure operating characteristics that require careful regulation of their connection to the casting chamber to prevent overloading which may result in the pumps pulling out and being rendered inoperative. Since the volume of the casting chambers is large, overloading of the pumps will result if the connection with the casting chamber is made too rapidly, particularly during starting when the system is being conditioned for a casting operation.
  • One of the objects of the invention accordingly, is to provide a valve of improved construction which will enable the required throttling regulation of the connection between the vacuum line and the casting chamber.
  • a further object of the invention accordingly is to provide a valve having a cartridge construction that facilitates, as stated above, its removal and replacement in the vacuum line.
  • the cartridge comprises a cylindrical housing that carries all of the valve operating parts and is adapted to have telescopic engagement in one of the pipe sections of the vacuum line to mount it in operative position.
  • FIGURE 1 is a vertical sectional view which shows the manner in which the valve is mounted in a pipe line;
  • FIGURE 2 is a plan view of the valve shown in FIG- URE 1;
  • FIGURE 3 is a vertical sectional view taken substantially along the line III-III of FIGURE 2;
  • FIGURE 4 is a fragmentary sectional view drawn to an enlarged scale showing the construction of the valve seat
  • FIGURE 5 is a plan view which shows the arrangement of the pilot valves in the main valve throttle plate
  • FIGURE 6 is an enlarged plan view of a portion of the main valve plate shown in FIGURE 5 that contains one of the pilot valves therein;
  • FIGURE 7 is a sectional view taken substantially along the line VIIVII of FIGURE 6;
  • FIGURES 8 and 9 are respectively plan and elevational views of a valve liner that forms part of the pilot valve shown in FIGURE 7;
  • FIGURE 10 is a fragmentary sectional view similar to FIGURES 2 and 3, but showing a modified embodiment of the invention which omits the pilot valves of the preferred embodiment shown in FIGURES 2 and 3.
  • the valve of this invention is in the form of a cartridge that comprises a cylinder 1 on which all of the essential operating parts of the valve are mounted. At its upper end the cylinder 1 has an outturned flange 2 by which it is supported on a coupling 3,313,318 Patented Apr. 1 r, 1967 flange 3 at one end of a pipe section 4 that forms part of a vacuum line for withdrawing air and gas from the casting chamber of a vacuum casting apparatus.
  • the pipe section 4 forms the terminal end of the vacuum line within the casting chamber, in which case the valve flange 2 is loosely supported on the pipe coupling flange 3 so that the valve may be easily removed between casting operations.
  • the valve may be located in a portion of the vacuum line outside the casting chamber, in which case the flange 2 is bolted between the coupling flange 3 and a similar coupling flange 5 on the end of an adjacent pipe section 6.
  • the valve is preferably located between pipe sections 4 and 6 at a point where the vacuum line is normally separated between routine casting operations to provide for its ready removal from the section 4 when necessary.
  • the cylinder 1 has a telescopic or slide fit in the pipe section 4 so that its internal surface 7 in effect forms a part of the pipe-line through which air and gas flows from the casting chamber to the vacuum pumps in the direction indicated by the arrows in FIGURE 1.
  • the valve comprises a circular throttle plate 8 and a valve seat 9 in the form of an annular flange that extends circumferentially about the lower end of the cylinder 1 and furnishes a support for an O-ring seal 10.
  • the O-ring seal 11 ⁇ provides a valve seating surface 11 that faces in an upward axial direction relative to the cylinder 1 and engages a peripheral edge portion of the throttle plate 8 when it is lowered to its closed position as shown in solid lines in the drawings. From its closed position, the throttle plate 8 travels axially upwardly with a tilting motion to an open position in a manner to be described.
  • Upward movement of the valve plate 8 in the cylinder 1 is effected by a pair of cables 12 that have their lower ends connected with the plate 3 in a manner to be described and their upper ends connected to winding spools 13.
  • the spools 13 are keyed to an operating shaft 14 which has opposite ends 15 thereof rotatably supported in openings in the flange 2 at the upper end of the cylinder 1.
  • One of the shaft ends 15 has an extension 16 for connection with a crank (not shown) for manual operation or a motor driven pulley (not shown) for effecting rotation thereof.
  • the spools 13 may be omitted and the cables attached to and wound directly on the shaft 14.
  • Initial upward movement of the throttle plate 8 in this manner operates to move it out of seating engagement with the valve seating surface 11.
  • Disengagement of the throttle plate 8 with respect to the seating surface 11 in this manner provides for limited flow of air and gas through the annular space or clearance about the peripheral edge of the throttle plate 8.
  • the operating cables 12 are connected at their lower ends with the throttle plate 8 through pilot valves 21 in a manner to be described.
  • the lower ends of the cables 12 are connected by eyelets 22 directly to the throttle plate 8 so that initial upward movement of the cables 12 by winding rotation of the spools 13 is effective to elevate the throttle plate 8.
  • each of the pilot valves 21 are located in spaced positions along a diameter of the plate 8 that is parallel to the tilting rod 17.
  • each of the pilot valves 21 operates to provide an adjustable throttling connection for gradual reduction of the pressure on the upper or casting chamber side of the main valve plate 8 before axial upward movement is imparted thereto by the cables 12.
  • each of the pilot valves 21 comprises a cylinder 2? that is secured at its upper end to the throttle plate 8 in a depending position arranged concentrically about an opening 24 therein.
  • An annular valve seat 25 is secured to the lower end of the cylinder 23 for engagement with a circular valve plate 26 that is movable axially upwardly from its closed position engaged with the valve seat 25 as shown in solid lines in FIGURE 6.
  • the cable 12 extends through an opening 27 in the valve plate 26 and has a lead weight 28 in the form of a ball at its lower end.
  • the weights 28 engage and raise the valve plate 26 in the cylinder 23 out of seating engagement with the valve seat 25.
  • a valve liner 29 is arranged about the inner surface of the cylinder 23 and has a plurality of V-shaped slots 30 therein.
  • the slots 39 have their points 31 arranged adjacent the valve seat 25 so that they are gradually uncovered during upward movement of the valve plate 26 in the cylinder 23 to provide gradually increasing openings through which the pressure above the main valve plate 8 is gradually reduced.
  • the valve In operation, the valve is closed and the vacuum ejector pump connected with the ejector piping 4 is turned on when the casting chamber is ready for a metal casting operation as customary in vacuum casting apparatus of this kind. After this has been done, the valve is operated to connect the casting chamber piping 6 with the vacuum piping 4 and this is accomplished as explained above by rotating the winding spools 13 to draw the cables 12 upwardly in the cylindrical casing 1. In the preferred embodiment of the invention, upward movement of the cables 12 in this manner operates initially to engage the Weights 23 at the lower ends of the cables 12 with the pilot valve plate 26 and move it upwardly over the inner surface of the valve liner 29.
  • valve of this invention enables the operator to carefully control the vacuum connection for the casting chamber in a manner that prevents withdrawal of air or gas from the casting chamber at a rate that will overload the vacuum pumps. Since all of the essential valve operating parts are carried by the cylinder 1, which is readily assembled with a telescopic movement in an existing pipe section 4, it will be further apparent that the valve of this invention facilitates its removal for cleaning or repair. Although a cartridge construction using the removable cylinder 1 is preferred for this reason, it will be understood that the valve may be formed in a separate housing such as the pipe section 4.
  • a valve comprising a valve seat having an annular seating surface facing axially outwardly therefrom, a circular valve plate adapted to occupy a closed position with a peripheral edge portion thereof engaged with said seating surface, a pilot valve means on said plate comprising a cylinder having one end secured to said plate and projecting axially therefrom in a direction opposite that in which said seating surface faces, said plate having an opening therein aligned with said cylinder, a liner about the inner surface of said cylinder having Vshaped notches therein with the small ends of said notches arranged adjacent the other end of said cylinder, an annular pilot valve seat at the said other end of said cylinder in a position spaced axially beyond the said small ends of said notches, and a pilot valve plate movable axially in said cylinder and adapted to occupy a closed position at th said other end of said cylinder engaged with said annular pilot valve seat, and valve operating means operable initially to move said pilot valve plate axially toward said circular valve plate to disengage it from said annular
  • a valve for a pipe line comprising, the combination with a cylinder forming part of said pipe line, of a valve seat extending circumferentially about the inner surface of said cylinder and having an annular seating surface facing in an axial direction relative thereto, a circular valve plate adapted to occupy a closed position extending transversely of said cylinder with a peripheral edge portion thereof engaged with said annular seating surface, said plate being movable through said cylinder in said axial direction and being tiltable from said transversely extending position to an open position, a pilot valve means on said plate operable upon progressive movement to open position to provide a throttle opening of gradually increasing size through said plate, and valve actuating means for sequentially operating said pilot valve means to open position and thereafter to move said valve plate axially through said cylinder, and means in the path of axial movement of said valve plate through said cylinder for tilting it out of said transversely extend ing position to said open position.
  • a valve for a pipe line comprising, the combination with a cylindrical cartridge forming part of said pipe-line, of a valve seat extending circumferentially about the inner surface of said cartridge and having an annular seating surface facing in an axial direction relative thereto, a circular valve plate adapted to occupy a closed position extending transversely of said cartridge with a peripheral edge portion thereof engaged with said annular seating surface, said plate being movable through said cartridge in said axial direction, a pilot valve means on said plate comprising a cylinder having one end secured to said plate and projecting axially therefrom in a direction opposite that in which said seating surface faces, said plate having an opening therein aligned with said cylinder, a liner about the inner surface of said cylinder having V-shaped notches therein with the small ends of said notches arranged adjacent the other end of said cylinder, an annular pilot valve seat at the said other end of said cylinder in a position spaced axially beyond the small ends of said notches, and a pilot valve plate movable axially
  • valve operating means comprising a cable extending axially relative to said cartridge and having one end connected with said pilot valve plate for moving it to open position, means responsive to movement of said pilot valve plate to its said open position for rendering said cable effective to move said circular valve plate axially through said cylindrical cartridge, a spool on which the other end of said cable is wound, and means for rotating said spool to wind said cable thereon and operate said pilot valve and circular valve plates sequentially to their open positions.
  • a valve for a pipe line comprising a cylinder having its axis extending vertically and forming part of said pipe line, an upwardly facing annular seating surface at the lower end of said cylinder, an operating shaft rotatably mounted on the upper end of said cylinder in a horizontal position extending along a diameter thereof, a circular valve plate adapted to occupy a closed position with a peripheral edge portion thereof engaged With said seating surface, a pair of vertically extending and laterally spaced flexible strands having winding connections at their upper ends on said shaft and operating connections at their lower ends with said valve plate along a diameter thereof parallel to said shaft, said strands being effective to el vate said valve plate axially out of engagement with said seating surface upon being wound on said shaft in response to rotation thereof, and means for engaging said plate at a point spaced from and for tilting it about said last-named diameter in response to continued upward movement thereof.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Driven Valves (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Physical Vapour Deposition (AREA)
  • Sliding Valves (AREA)
US339437A 1964-01-22 1964-01-22 Sequentially operated plural valves for vacuum casting apparatus Expired - Lifetime US3313318A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US339437A US3313318A (en) 1964-01-22 1964-01-22 Sequentially operated plural valves for vacuum casting apparatus
GB2169/65A GB1082041A (en) 1964-01-22 1965-01-18 Fluid flow control valve for controlling the connection between a vacuum line and a chamber
FR2424A FR1421088A (fr) 1964-01-22 1965-01-19 Vanne pour appareil à mouler par dépression
DE19651500283 DE1500283A1 (de) 1964-01-22 1965-01-20 Absperrorgan fuer Vakuumgiessanlagen
ES0308380A ES308380A1 (es) 1964-01-22 1965-01-21 Perfeccionamientos en valvulas de control para la conexion entre una camara.
BE658735A BE658735A (xx) 1964-01-22 1965-01-22
NL6500852A NL6500852A (xx) 1964-01-22 1965-01-22
AT54565A AT249284B (de) 1964-01-22 1965-01-22 Überwachungsventil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US339437A US3313318A (en) 1964-01-22 1964-01-22 Sequentially operated plural valves for vacuum casting apparatus

Publications (1)

Publication Number Publication Date
US3313318A true US3313318A (en) 1967-04-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
US339437A Expired - Lifetime US3313318A (en) 1964-01-22 1964-01-22 Sequentially operated plural valves for vacuum casting apparatus

Country Status (8)

Country Link
US (1) US3313318A (xx)
AT (1) AT249284B (xx)
BE (1) BE658735A (xx)
DE (1) DE1500283A1 (xx)
ES (1) ES308380A1 (xx)
FR (1) FR1421088A (xx)
GB (1) GB1082041A (xx)
NL (1) NL6500852A (xx)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3382895A (en) * 1965-12-10 1968-05-14 United States Steel Corp Sequentially operated plural valves for gas duct
FR2859264A1 (fr) * 2003-08-27 2005-03-04 Mark Iv Systemes Moteurs Sa Dispositif de regulation a clapet et boitier et ensemble de regulation comprenant un tel dispositif

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3422589A1 (de) * 1984-06-18 1985-12-19 Arthur Pfeiffer Vakuumtechnik Wetzlar Gmbh, 6334 Asslar Hochdruck-vakuumventil
CN115435102B (zh) * 2022-11-07 2023-01-24 中国空气动力研究与发展中心超高速空气动力研究所 一种双面密封真空插板阀的控制***及其控制方法

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US754547A (en) * 1903-08-14 1904-03-15 William Powell Co Throttle-valve.
US1710585A (en) * 1925-11-27 1929-04-23 Matthiessen Paul Hinged gate for the testing cylinders of submarines
US1794830A (en) * 1928-12-08 1931-03-03 David Angus Locomotive stop valve
US1995052A (en) * 1932-07-30 1935-03-19 American Ship Building Company Automatic stop valve
US2482198A (en) * 1944-09-05 1949-09-20 Parker Appliance Co Valve structure
US2524474A (en) * 1947-03-31 1950-10-03 George V Randel Valve
US2710737A (en) * 1953-03-11 1955-06-14 Edward R Schaupp Valve unit
US2879799A (en) * 1959-03-31 Valve
FR1303602A (fr) * 1961-08-02 1962-09-14 Compteurs Et Moteurs Aster Robinet d'extrémité pour compteur de liquide
US3136338A (en) * 1961-05-17 1964-06-09 Fmc Corp Dashpot controlled loading valve

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2879799A (en) * 1959-03-31 Valve
US754547A (en) * 1903-08-14 1904-03-15 William Powell Co Throttle-valve.
US1710585A (en) * 1925-11-27 1929-04-23 Matthiessen Paul Hinged gate for the testing cylinders of submarines
US1794830A (en) * 1928-12-08 1931-03-03 David Angus Locomotive stop valve
US1995052A (en) * 1932-07-30 1935-03-19 American Ship Building Company Automatic stop valve
US2482198A (en) * 1944-09-05 1949-09-20 Parker Appliance Co Valve structure
US2524474A (en) * 1947-03-31 1950-10-03 George V Randel Valve
US2710737A (en) * 1953-03-11 1955-06-14 Edward R Schaupp Valve unit
US3136338A (en) * 1961-05-17 1964-06-09 Fmc Corp Dashpot controlled loading valve
FR1303602A (fr) * 1961-08-02 1962-09-14 Compteurs Et Moteurs Aster Robinet d'extrémité pour compteur de liquide

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3382895A (en) * 1965-12-10 1968-05-14 United States Steel Corp Sequentially operated plural valves for gas duct
FR2859264A1 (fr) * 2003-08-27 2005-03-04 Mark Iv Systemes Moteurs Sa Dispositif de regulation a clapet et boitier et ensemble de regulation comprenant un tel dispositif

Also Published As

Publication number Publication date
ES308380A1 (es) 1965-05-01
AT249284B (de) 1966-09-12
DE1500283A1 (de) 1969-06-04
NL6500852A (xx) 1965-07-23
GB1082041A (en) 1967-09-06
BE658735A (xx) 1965-07-22
FR1421088A (fr) 1965-12-10

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