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
  • 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
  • F16K1/12—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 streamlined valve member around which the fluid flows when the valve is opened

Definitions

• the invention relates tc a valve with an axially displaceable annular piston, in particular for pipelines for limiting or stopping the stream of the medium.
• the task of the invention is to develop a valve with an axially displaceable annular piston, which can be applied within the size-, pressure-, temperature and medium range required by the industry, being suitable for quick closing and control, respectively, by a local or remote intervention, or even without any external intervention; a further requirement lies in-that compared to known armatures - displacement of the closing element should require less force, structural length should be less and as a result specific material consumption and streaming losses in the open position could be also diminished.
• the task set is solved in such a manner that the valve has a closing head having been arranged in the streaming medium, a bearing element being fixed in the stream by elements permitting the medium to pass, carrying the closing head, a house being connected to the bearing element and allowing the installation of the closing head, furtheron between the house and the bearing element there is a gap with an annular cross-section, in which the axially displaceable annular piston is arranged, at last there is a device for moving the annular piston and on the outer and/or inner mantle surface of the annular piston there is a sealing element preventing the flow in axial direction.
• a further advantage may be achieved when the moving devices having been connected to the annular piston are protected against the medium by using a pair of sealing elements enclosing the moving devices on the mantle surface of the piston.
• the moving device is mechanically connected to the annular piston in such a manner that on the outer mantle surface either an axial toothing, or a groove running perpendicularly to the axis is formed, while the moving device is engaged with said groove by means of the moving thread having been formed on the inner mantle surface, or through a motion transferring ring being connected to the annular piston being secured against rotation, or by means of a directly geared wheel, or by means of an eccentric moving pin matching to the groove of the annular piston being secured against rotation.
• Said moving elements are attached to the axis of the moving device or are formed as a monolithic unit therewith.
• the axis is clamped arither in the aperture of the house or in the radially and axially acting bearing in the drive house which may be formed as an independent unit.
• Rotary motion is induced by a directly or indirectly connected drive unit - in case of necessity being formed in a self-closing manner for preventing the unwanted axial displacement of the annular piston -, which is actuated manually or with a snap magnet, or by means of diversely driven motors, or hydraulically or pneumatically; the drive unit is protected against the medium by means of a sealing element.
• the embodiment may be considered also as advantageous, with which the axial displacement of the annular piston being secured against rotation is solved in such a manner that on the outer mantle surface a moving thread is formed. Thereto a motion transferring ring with an inner moving thread and being limited in axial direction is connected, which is formed as the rotor of an electric motor. Rotary movement thereof is ensured by the coil forming the stator of the said electric motor and being arranged on the outer surface of the house.
• sealing elements are arranged along the outer and inner mantle surface of the annular piston, which are closing the path of the axial flow of the medium, while an aperture formed in the house is leading to the space behind the annular piston, serving e.g. for the introduction of an external control medium.
• the embodiment, with which one or more shoulders are formed on the outer and/or inner mantle surface of the annular piston, is most advantageous, in particular from the point of view of control technique.
• the space or spaces being confined by the shoulder(s), the house and/or the bearing element are closed by sealing elements.
• one or more apertures are formed leading to said spaces; by the aid of the aperture(s) the position of the annular piston can be well influenced either by inner and/or by outer media.
• one or more snap magnets are arranged, under the influence of which the annular piston can be displaced axially.
• the embodiment can be considered as advantageous, with which .the annular piston is axially displaced by means of an intermediate working medium in such a manner that the working cylinder storing the working medium and being provided with the apertures for the inflow and outflow thereof, is connected to the orifice confined with the sealing elements within the bearing element or the house.
• a piston - preferably with a piston rod - is arranged for limiting and moving the working medium so, as to prevent the axial medium flow along the mantle surface by using sealing elements.
• the aperture leading to the space above the piston is connected either to the streaming medium, or to an outer medium, or into the open air, or in a previously already described manner to the orifice in the house or the bearing element, being closed by the sealing elements, thus it becomes possible to influence the force needed for the displacement of the piston or to move the annular piston back and forth by the aid of the working medium.
• Displacement ⁇ f the piston is performed by means of a moving unit, which is fixed to the working cylinder and eventually closing the same, displacing the piston in an axial direction and being connected directly or indirectly thereto, in a given case formed in a selfclosing manner as to prevent unwanted displacement of the annular piston, while actuation of said moving unit is performed either manually, or with a snap magnet, or motor driven in different way, hydraulically or pneumatically and which in a given case is separated from the working cylinder by means of sealing elements.
• Displacement of the annular piston can be carried out that way too that into one or more apertures leading into the spaces having been closed by the sealing elements within the house and/or the bearing element, an own and/or external medium is connected. Furthermore, it becomes possible to insert an actuating device, e.g. a pressure regulator or a three-way-valve being able to change the condition characteristics of said media; by these measurements the annular piston can be displaced till a balance between the forces acting on its frontal surfaces is reached, or it arrives to its open or closed position, either automatically, or by the aid of the actuating device having been used. The less moving force is needed with the embodiment, where an annular piston is provided with frontal surfaces - one rear and one facing the medium - of equal size, being in contact with the inner medium of identical pressure even in the closed position.
• an actuating device e.g. a pressure regulator or a three-way-valve being able to change the condition characteristics of said media
• the bearing element is connected to the house on the entering side.
• the bearing element is connected to the house on the discharge side.
• bearing element and the house are formed as a monolithic unit, in form of a valve body.
• the embodiment may be considered as utmost economical, where the outer diameter of the house or the valve body is such as to be clamped between the jointing flanges by means of screws.
• a closed cavity is formed, through the apertures leading thereto cooling or heating of the valve becomes possible.
• the closing head, the bearing element and the house are formed with a profile which is following the stream lines of the medium, whereby said profiles are defining a constant flow-cross-section at least from. the beginning of the profile being surrounded by the stream till the end thereof.
• the embodiment is also to be considered as advantageous, with the closing head being fixed to the bear ing element, to the immersed part thereof, is solid, however a hollow closing head, eventually formed as a shell is also possible.
• the closing head is made of a material with sealing properties, e.g. of rubber, a synthetic material, etc. If required, a metal reinforcing element may be inserted.
• operational safety of the valve can be increased by protecting the sealing elements with an elastic bellow or a stripper ring.
• the surfaces coming into contact with chemically aggressive or erosive media are provided with a coating being resistant of the same, so e.g. with chrome, nickel, elastomer, a synthetic material, PTFE, enamel, etc.
• valves according to the invention compared to the known valves for solving the same tasks - yields the following advantages: -
• the valves may be achieved within the industrially required dimensional, temperature -, pressure - and medium ranges , - the valves are particularly economical in the range of large dimensions and high pressure, since their critical elements have an annular crosssection subjected toinner or outer pressure, accordingly material requirement is less, simul taneously the closing elements are relieved from internal pressure and can be manufactured without flanges;
• valves according to the invention may be used as typified armatures.
• valve is well suitable for performing control tasks and for quick closing, automatically or with a remote controlled intervention, as a consequence, automatization and resulting decrease of the number of operators becomes possible.
• Figure 1a is showing the valve having been provided with the manually actuated hydraulic raoving system
• Figure 1b illustrates the valve with the manually actuated mechanic moving system
• Figure 2a is showing the valve which can be connected to any system by means of a threaded bond and the annular piston with the sealing elements affecting both mantle surfaces
• Figure 2b presents the valve which can be actuated by means of the snap magnets
• Figure 3a is showing the valve with which the moving system is formed as an electromotor
• Figure 3b illustrates the valve having been provided with a mechanical moving system.
• Figure 4a is showing a two-way valve to be actuated by means of a snap magnet and being provided with a hydraulic moving system
• Figure 4b is an embodiment with which the pressure ratio is automatically regulated
• Figure 5a illustrates a valve allowing to flow the medium, the pressure of which is surpassing the pressure of the medium on the discharge side.
• Figure 5b is showing a valve, which allows to pass a medium, the pressure of which does not depend on the pressure of the medium on the discharge side
• Figure 6 is presenting a valve being suitable for performing the tasks of heat power engineering and having been provided with a manually actuated excentric moving pin in the moving system.
• the bearing element 2 is connected to the house 3 by means of a threaded bond on the discharge side ; the oute r diameter of sa id house is such as to be clamped between the jointing flanges 31 by means of screws.
• the solid closing head 1 having been arranged in the s t reaming med ium is a t tached to the bearing element 2 with the longitudinal ribs by means os the screw 48.
• the bearing element 2 and the house 3 are formed so that there is an axial gap with an annular cross-section inbetween. This is taking up the annular piston 5, which - in its open position - is entirely occupying the gap 4.
• the elements are defining a profile, in so far as, in downstream, the flow-cross-section is continuously decreasing quite to the end of the bearing element 2 which is immersed in the medium, therefrom - by inserting a diffuser tract - the crosssection is steadily increasing till reaching the original cross-section.
• the annular piston 5 is closing on its smallest diameter onto the closing head 1, the sealing element 7 thereof is also here effective, while in the space behind, the aperture 11 ensures inflow and outflow of the medium.
• the outer part of the annular piston 5 is formed with a shoulder, the space before the shoulder is closed by the sealing elements 8 and 21.
• the medium from the working-cylinder 53 arrives through the aperture 22 into the said space, the working medium is put into motion by the piston 50 and the sealing element 51 having been arranged un She mantle surface thereof.
• Putting into motion is performed in such a manner that the piston rod 52 being attached to the piston 50 is displaced axially by the displacing spindle 55 which is connected on its opposite side to the bearing 58, by means of the hand-wheel 59 and the displacing thread having been formed in a sslf-closing manner in the drive house 56 respectively on the displacing spindle 55.
• annular piston 6 with the security element 14 inhibiting rotation, as well with the self-closing moving thread on the outer surface thereof is displaced by means of the attached moving ring 15, which is provided with a bevel gearing on its outer mantle surface. Displacement is performed in such a manner that a geared axis 43 is connected to the bevel gearing of the ring 15 and the axis 43 is axially clamped in the 46 drive house - which again is fixed in the aperture 18 - by means of the bearing 58. Outflow of the medium is prevented by means of the sealing elements 57.
• the annular piston 6 with the security element 14 inhibiting rotation, as well with the self-closing moving thread on the outer surface thereof is displaced by means of the attached moving ring 15, which is provided with a bevel gearing on its outer mantle surface. Displacement is performed in such a manner that a geared axis 43 is connected to the bevel gearing of the ring 15 and the axis 43 is axially clamped in the
• control medium Into the gap 4 having been closed in such a manner e.g. control medium is led through the aperture 9, in such a manner it can be achieved that the pressure of the system cannot be less than that of the control medium, in case of a pressure drop the system is automatically closed.
• the valve By changing the pressure of the control medium the valve can be closed and opened, respectively.
• connection and closing diameter are identical with those according to Figure 2a.
• the sealing element 7 having been arranged on the inner mantle surface and the medium being introduced through the aperture 11 behind the annular piston 26 - being displaceable under the influence of the magnetic force - are ensuring load relief against the static pressure of the medium.
• the resulting low requirement of displacing force enables quick closing by means of the snap magnets 27 or fine-regulation by using a regulating unit 29 influencing its relative field strength.
• the bearing-element 60 is fixed to the flanged house 32 by means of screws 61 on the discharge side, where the medium is leaving the system.
• Fluid mechanical design is identical with that having been specified in connection with Figure la with the difference that in this case decrease of the cross-section is stronger, while enlargement is formed partly in the jointing flange 36.
• the annular piston 45 is closing with its smallest diameter onto the solid closing head 62 having been provided with the valve seat 64. Load relief against the static pressure of the medium is solved in the previously described manner.
• the annular piston 45 being provided with a self-closing moving-thread on the outer mantle surface is protected against a rotary movement by means of the securing element 63.
• the annular piston 45 is displaced by the aid of the motion-transmitting ring 66 being attached to the piston by means of an internal moving thread and being formed as a rotor of an electromotor and being fixed in the axial direction by means of the insert element 65 in such a manner that on the outer part of the house 32 a coil49 - having been formed as the stator of the electric motor - is arranged.
• This arrangement is well suitable for remote actuation, it ensures quick closing.
• the annular piston 69 is formed with an inner and outer shoulder, while the spaces before and behind the shoulders are closed with the sealing elements 7, 8, 21, 25.
• the space of the working-cylinder 53 lying under the piston 50 is connected via the aperture 22, the space above the piston 50 via the apertures 54,9 with the spaces before and behind of the shoulders. In such a manner the annular piston 69 can be displaced in two directions by displacing the piston 50. Putting into motion is performed by moving the ring 71 having been fixed onto the piston rod 70, by means of the snap magnet 27 against the spring 72. By using the regulating unit 29, the annular piston 69 can be brought in any optional position.
• the inner design corresponds to the design being specified in connection with Figure 4a.
• the space before the shoulder is closed with the sealing element 23, while the aperture 24 leads to the outer free space.
• the space before the other outer shoulder is connected via the aperture 74 with the entering medium.
• the space- having been closed with the rear frontsurface of the same size, as the outer shoulders - is connected to the discharged medium via the aperture 10.
• the streaming medium arrives to the space behind the inner shoulder through the aperture 11.
• the bearing element 82 is fixed on the entering side to the house 83 being clamped between the flanges not illustrated here; in the inside of the house a closed cavity 34 being provided with the apertures 35 is formed, accordingly heating or cooling becomes possible.
• the annular piston 19 is closing on its smallest diameter with the valve seat 39 having been clamped between the bearing element 82 and the hollow closing head 84 being fixed to the bearing element with a threaded bond.
• the sealing element 7 being also arranged on the same diameter is protected against damages by means of the stripper rings 42.
• the cross-section being considerably narrowing on the entering side is continuously increased after the closing diameter and is reaching its original size.
• the annular piston 19 - being relieved and protected with the securing element 85 against a rotary motion - is provided with a groove running perpendicularly to the axis on its outer mantle surface, into which the excentric moving pin 20 of the axis 86 is engaged.
• the axis 86 is axially clamped by means of the bearing 58 to be found in the drive house 92, which again is fixed in the aperture 87 of the house 83.
• the motion transferring ring 90 secured against rotation can be axially displaced by means of the moving thread on the axis 89, whereas said axis is fixed to the hand-wheel 59 and clamped axially with the bearing 88.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• Mechanical Engineering (AREA)
• Lift Valve (AREA)
• Mechanically-Actuated Valves (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=10952410

Family Applications (1)

Country Status (5)

Cited By (2)

Citations (7)

Family Cites Families (3)

• 1981
  • 1981-04-17 HU HU100581A patent/HU183402B/hu unknown
• 1982
  • 1982-04-16 AU AU83356/82A patent/AU8335682A/en not_active Abandoned
  • 1982-04-16 WO PCT/HU1982/000015 patent/WO1982003671A1/en not_active Application Discontinuation
  • 1982-04-16 EP EP19820901147 patent/EP0076296A4/en not_active Withdrawn
  • 1982-04-16 JP JP50126382A patent/JPS58500621A/ja active Pending

Patent Citations (7)

Non-Patent Citations (2)

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