US3754562A - Throttle valve mechanisms - Google Patents

Throttle valve mechanisms Download PDF

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Publication number
US3754562A
US3754562A US00246304A US3754562DA US3754562A US 3754562 A US3754562 A US 3754562A US 00246304 A US00246304 A US 00246304A US 3754562D A US3754562D A US 3754562DA US 3754562 A US3754562 A US 3754562A
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US
United States
Prior art keywords
housing
control
actuating
pendulum
piston
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
US00246304A
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English (en)
Inventor
N Gustafsson
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.)
Hyco Hydraulic AB
Original Assignee
Hyco Hydraulic AB
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 Hyco Hydraulic AB filed Critical Hyco Hydraulic AB
Application granted granted Critical
Publication of US3754562A publication Critical patent/US3754562A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/22—Synchronisation of the movement of two or more servomotors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
    • B60P1/64—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading the load supporting or containing element being readily removable
    • B60P1/6409—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading the load supporting or containing element being readily removable details, accessories, auxiliary devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/12—Supports
    • B65D90/14—Legs, e.g. detachable
    • B65D90/143—Detachable individual legs
    • 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
    • Y10T137/0753—Control by change of position or inertia of system
    • Y10T137/0923—By pendulum or swinging member

Definitions

  • a throttle valve mechanism having a housing in which a pendulum depending from the housing is universally swingable around a geometrical axis of the housing and in which a plurality of throttle valves are arranged and each have one displaceable throttling valve member for varying the throttling effect of the respective throttle valve, the throttling valve member is displaceable by means of an actuating piston movable in an actuating cylinder connected with a control cylinder in which a control piston is displaceable, a liquid body being enclosed and filling the space between the actuating piston and the control piston, the control pistons for the throttle valves being spaced around said geometrical axis adjacent the upper end of the pendulum which has means engaging the control pistons for displacing them in the control cylinders as a result of swinging movement of the pendulum, the effective cross-sectional area of the actuating
  • a throttle valve mechanism having a housing in which a pendulum depending from the housing is mounted for universal swinging movement around a centre on a geometrical axis of the housing and in which a plurality of throttle valves are arranged and each have one displaceable throttling valve member which is adjustable by means of the pendulum into different throttling states in response to the position taken by the pendulum in relation to the geometrical axis.
  • throttle valve mechanisms are used in devices for lifting and lowering heavy objects, such as transport containers, to control pressure fluid driven lifting elements placed around and connected to the object, so that these devices will lift and lower the object to a uniform extent and the object is not subjected to any precarious tilting movement when lifted or lowered.
  • the throttle valve mechanism can be placed on the container with the above mentioned geometrical axis in vertical position. If the object during lifting or lowering begins to tilt because some lifting element operates more rapidlyor more slowly than the other lifting elements the pendulum will swing away from said geometrical axis, thereby actuating the throttle valves in such a way that the speeds of the lifting or'lowering movements of the lifting elements are altered to compensate for the upsetting tendency.
  • Prior art throttle valve mechanisms of the type outlined in the foregoing suffer from the drawback that a relatively large swinging amplitude of the pendulum and thus a heavy obliquity of the object is required before the throttle valve mechanism is able to compensate for the upsetting tendency of the object to an appreciable extent, Where very large and very heavy objects are concerned it is imperative, however, that a throttle valve mechanism of the type outlined in the foregoing already at very small swinging amplitudes of the pendulum provides a large compensation of the upsetting tendency of the object.
  • the present invention has for its object to provide a throttle valve mechanism of the type outlined in the foregoing which is very sensitive to positional changes and thus realizes a large variation of the throttling effects of the throttle valves at. a, small change in position of the pendulum.
  • the valve member of each throttle'valve has an actuating piston which is sealingly displaceable in a cylinder and defines a liquid filled chamber which has a cylinder portion of larger cross sectional area than thatof the cylinder of the actuating piston, 21 control piston beingsealingly displaceable in said cylinder portion of the liquid filled chamher. and the actuating pistons of the'throttle valves are arranged in the throttle valve mechanism housing spaced around the geometrical axis of saidhousing and tion;
  • FIG. 2 shows a lifting element used in the lifting device shown in FIG. 1, a reversing valve mechanism, the throttle valve mechanism according to the invention, a control valve mechanism, and a pressure fluid source with appertaining pressurefluid lines;
  • FIG. 3 shows a partial side view and partial sectional view of a throttle valve mechanism according to the invention with the lower portion of the pendulum cut away;
  • FIG. 4 shows a hydraulic circuit diagram
  • FIG. 1 shows a parallel-epipedical transport container l which is raised from the ground 2 by means of four hydraulic lifting elements 3.
  • the lifting elements 3 each have one bracket 4.
  • These brackets are in a known manner detachably hooked to the side walls of the transport container 1 in the vicinity of each container end wall.
  • Secured to one of the brackets 4 is a reversing valve mechanism 5 and a throttle valve mechanism 6.
  • the throttle valve mechanism 6 has a housing in which a pendulum 7 depending from the housing is universally swingable around a geometrical axis of the housing. The housing is so-fastened to the bracket 4 that said geometrical axis of the housing, when the bracket is hooked to the transport container 1, is parallel with the vertical centre axis of the container 1.
  • each lifting element 3 is a double-acting cylinder and piston assembly the piston rod 8 of which rests on the ground 2 and the cylinder 9 of which is fixed to the bracket 4 shown in FIG. 1 but not in FIG. 2.
  • the upper and lower ends of the cylinder 9 are connected via lines'l0 and 11 to the reversing valve mechanism 5. Separate lines l0 and 11 pass from the cylinder 9 of each lifting element 3 to the valve mechanism 5.
  • Four lines 12 lead from the valve mechanism 5 to four throttle valves in the throttle valve mech anism6.
  • the valve mechanisms 5 and 6 could be built together in a single housing so that the lines 12 may be internal passages in the housing.
  • a pressure fluid source in the form of a pump 14 driven by a motor 13 supplies pressure fluid from a receptacle 15 to a control valve 16.
  • Two lines 17 and 18 connect the valve 16 to the reversing valve mechanism 5.
  • the valve 16 can be set in a known manner into a position in which pressure fluid from the pump 14 flows through the line 17 to the valve mechanism 5 while the line 18 is in communication with the supply receptacle 15, and into another position in which pressure fluid flows from the pump 14 through the line 18 to the reversing valve mechanism 5 while the line 17 is in communication with the supply receptacle 15.
  • the throttle valve mechanism 6 is connected via a line 19 to the supply receptacle 15.
  • the throttle valve mechanism 6 is shown in detail in FIG. 3. It has a substantially cylindrical housing 2 0 which is fastened by fastening devices (not shown) in such a way to the bracket 4 (shown in FIG. 1) that the geometrical centre axis 21 of the housing is parallel with the central height axis of the transport container 1.
  • the housing comprises a number of throttle valves corresponding to the number of lifting elements :3 (FIG. 1), Le. in the embodiment chosen four throttle valves which are spaced around the centre axis 21 in such a way that the throttle valves in horizontal projection are at the corners of a quadrangle.
  • the housing 20 shall be fastened to the bracket 4 (FIG. 1) in such a way that said quadrangle is oriented in the same way as' the horizontal quadrangle at the corners of which the four lifting elements 3 are placed.
  • FIG. 3 shows one of the throttle valves in axial section and partly in side elevation.
  • This throttle valve will now be described, and the description applies to all four throttle valves.
  • the throttle valve is of the needle valve type.
  • it has a conical valve member 22 which is integral with an actuating piston 23 which is sealingly displaceable in a cylinder 24 formed by a bore in the housing 20 and having its axis parallel with the axis 21 of the housing 20.
  • the lower end of the actuating piston 23 projects into a cylinder 25 formed by a bore in the housing 20 and coaxial with the cylinder 24 but having a considerably larger diameter than said cylinder.
  • the lower end of the actuating piston 23 has a pin 26 which is guided in a bore formed in a control piston 27 which is sealingly displaceable in the cylinder 25.
  • the pistons 23 and 27 define between them in the cylinder 25 a chamber 28 which is entirely filled with liquid. The filling of liquid into the chamber 28 can take place through a fill passage 30 which is normally closed by means of a screw plug 29.
  • the lower ends of the control pistons 27 of the four throttle valves project from a lower end wall of the housing 20 and engage a disk 31 on the upper end of the pendulum 7.
  • Beneath the disk 31 the pendulum has a spherical portion 32 by means of which the pendulum is mounted for universal swinging movement in a spherical bushing in a cover 33 screwed into the lower end of the housing 20.
  • the pendulum 7 is so mounted that it can swing around a centre on the centre axis 21.
  • the conical valve member 22 cooperates with a valve seat at the lower end of a piston 34 which is movable in the cylinder 24.
  • a spring 36 interposed between the upper end of the piston 34 and a set screw tends to move the piston 34 downwards to urge the seat of the piston against the valve member 22.
  • the piston 34 has an annular groove 37 which via passages 38 in the piston is in communication with the valve seat of the piston.
  • the housing 20 has a connecting bore 39 for one of the lines 12 (FIG. 2) from the reversing valve mechanism 5 so that liquid supplied through this line and being under a given pressure can flow into the groove 37 and pass through the passages 38 to the valve seat.
  • the cylinder 24 is intersected by a bore 40 which is radial with respect to the cylindrical housing 20 and is in communication with a connecting bore 41 for the line 19 (FIG. 2) leading to supply receptacle 15.
  • FIG. 4 shows a complete circuit diagram of the hydraulic circuits.
  • the control valve 16 is shown in FIG. 4 in the form of a slide valve the piston of which is set in FIG. 4 into a position to connect the line 17 to the pump 14 and the line 18 to the supply receptacle 15. This is the position of the valve 16 in which it causes the lifting units 3 to lift the container 1.
  • the reversing valve mechanism 5 is shown in FIG.
  • valve member 4 in the form of a slide-type valve member 42 which is movable in acylinr der and has a plurality of annular grooves for establishing various connections between the lines opening into the cylinder wall of the valve mechanism, said slidetype'valve member being settable into two extreme positions in the cylinder with the aid of pressure fluid from the lines 17 and 18, respectively, which lines are each connected to one end of the cylinder. Since the line 17 in FIG. 4 is connected to the pump 14, the valve member 42 in FIG. 4 is moved into its left end position so that pressure fluid from the line.l7 according to the line connections illustrated is supplied to the upper end of the cylinders of the lifting units 3, whereby said lifting units 3 will lift the container 1.
  • the pressure fluid is under a certain pressure and by reason of the described construction of the piston 34 is capable of raising the piston 34 slightly from the valve member 22 against the action of the spring 36.
  • the pressure fluid thus flows, while beingv throttled, through the valve seat around the valve member 22 to the passage 40 and through the connecting bore 41 and the line 19 connected therewith to the supply receptacle 15.
  • the throttling effect in the valve seat has a braking effect on the lifting movement of the respective lifting unit.
  • the left lifting unit 3 which is the upper one in FIG. 4 tends to lift more rapidly than the other lifting units 3 the height axis of the container 1 and thus the axis 21 of the throttle valve housing will take an oblique position so that the axis of the vertically depending pendulum 7 is set in an oblique position to the axis 21 in such a direction that the disk 31 of the pendulum 7 urges the control piston 27.0f the throttle valve shown to the lower right in FIG.
  • the control valve 16 For a lowering of the container 1 by means of the lifting units 3 the control valve 16 is so adjusted that the line 18 will be put in communication with the pump 14 and the line 17 will be put in communication with the supply receptacle 15.
  • the reversing valve piston 42 will be set into its right end position so that pressure fluid from the line 18 will be supplied to the lower end of the cylinders of the lifting units 3 through the lines 11 and the upper ends of the cylinders of said lifting units 3 will each be connected through the lines to one of the throttle valves 22, 34.
  • the reversing valve mechanism 5 has connected the different lifting units to the respective throttle valves 22, 34, i.e. in such a way that for instance the upper left lifting unit 3 in FIG.
  • a throttle valve mechanism comprising a housing, a pendulum depending from said housing, means mounting the upperend of said pendulum in said'housing for universal swinging movement around a centre on a geometrical axis of said housing, a plurality of What I claim anddesire to secure by Letters Patent throttle valves in said housing, inlet means and outlet means of said valves in said housing, said valves each comprising a throttling valve member displaceable for varying the throttling effect of said valve, an actuating piston connected to said throttling valve member for displacing said member, an actuating cylinder in said housing in which said actuating piston is sealingly displaceable, a control cylinder in said housing, a control piston sealingly displaceable in said control cylinder, said actuating cylinder and said actuating piston having a smaller effective cross-sectional area than said control cylinder and said control piston, and said actuating cylinder and said control cylinder being interconnected, a liquid body being enclosed and filling the space
  • a throttle va'lvemechanism according to claim 1 in which said throttling'valve member, said actuating piston and said control piston of each throttle valve are coaxially arranged in said housing on an axis parallel to said geometrical axis of said housing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Fluid-Driven Valves (AREA)
US00246304A 1971-04-22 1972-04-21 Throttle valve mechanisms Expired - Lifetime US3754562A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE05218/71A SE352609B (enrdf_load_stackoverflow) 1971-04-22 1971-04-22

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US3754562A true US3754562A (en) 1973-08-28

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Application Number Title Priority Date Filing Date
US00246304A Expired - Lifetime US3754562A (en) 1971-04-22 1972-04-21 Throttle valve mechanisms

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US (1) US3754562A (enrdf_load_stackoverflow)
DE (1) DE2218728A1 (enrdf_load_stackoverflow)
FR (1) FR2134039A1 (enrdf_load_stackoverflow)
IT (1) IT965637B (enrdf_load_stackoverflow)
NL (1) NL7205411A (enrdf_load_stackoverflow)
SE (1) SE352609B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3897717A (en) * 1972-09-28 1975-08-05 Victor Products Ltd Control valves
US3938538A (en) * 1974-01-28 1976-02-17 Westinghouse Electric Corporation Control valve apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB808592A (en) * 1955-10-07 1959-02-04 Ronald Greville Dennys Hydraulic selector valve

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB808592A (en) * 1955-10-07 1959-02-04 Ronald Greville Dennys Hydraulic selector valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3897717A (en) * 1972-09-28 1975-08-05 Victor Products Ltd Control valves
US3938538A (en) * 1974-01-28 1976-02-17 Westinghouse Electric Corporation Control valve apparatus

Also Published As

Publication number Publication date
SE352609B (enrdf_load_stackoverflow) 1973-01-08
FR2134039A1 (enrdf_load_stackoverflow) 1972-12-01
IT965637B (it) 1974-02-11
NL7205411A (enrdf_load_stackoverflow) 1972-10-24
DE2218728A1 (de) 1972-11-02

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