WO2005026599A1 - Flat multiperforated disc for butterfly valves - Google Patents

Flat multiperforated disc for butterfly valves Download PDF

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Publication number
WO2005026599A1
WO2005026599A1 PCT/ES2004/000396 ES2004000396W WO2005026599A1 WO 2005026599 A1 WO2005026599 A1 WO 2005026599A1 ES 2004000396 W ES2004000396 W ES 2004000396W WO 2005026599 A1 WO2005026599 A1 WO 2005026599A1
Authority
WO
WIPO (PCT)
Prior art keywords
disc
multiperforated
disk
flat
butterfly valves
Prior art date
Application number
PCT/ES2004/000396
Other languages
Spanish (es)
French (fr)
Inventor
Emilio Casado Flores
Original Assignee
Emilio Casado Flores
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 Emilio Casado Flores filed Critical Emilio Casado Flores
Publication of WO2005026599A1 publication Critical patent/WO2005026599A1/en

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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
    • 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
    • F16K1/16—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 pivoted closure-members
    • F16K1/18—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 pivoted closure-members with pivoted discs or flaps
    • F16K1/22—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 pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/222—Shaping of the valve member
    • 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
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
    • F16K47/14—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths the throttling member being a perforated membrane

Definitions

  • the present invention relates to a flat multi-perforated disk as a means to control the flow of fluid in a conventional butterfly valve (manual or control) so that it can be positioned at very closed throttle angles, even 0 °, which is equivalent to the disc in position, vertical, presenting cavitation indexes much lower than those of blind disc valves and therefore avoiding the dire consequences of noise, erosion, vibrations and breakages that the cavitation entails.
  • ° BACKGROUND OF A. INVENTION In industrial plants (nuclear and thermal power plants, refineries, petrochemicals, steelworks, cement plants etc.) there are many systems formed by pipes and valves through which different fluids circulate being water one of the most common employees generally as a cooling medium.
  • valves are used between other positioned devices and throttling situations (intermediate between open and closed). Said throttling positions are limited in all types of valves so that the cavitation phenomenon that causes serious consequences on the system does not appear.
  • t ⁇ > In general for all valve models and in particular for those with blind disc butterfly, existing on the market, the maximum throttling position is equivalent to a minimum opening of 25-30 °. For smaller angles the phenomenon of cavitation may occur.
  • the author based on his experience on these phenomena and on the tests performed by separate ZS, with blind disc butterfly valves and with multi-perforated restriction holes, has joined both devices to develop the equations that describe the behavior of a valve Multiperforated disk butterfly.
  • the multi-perforated disk, object of the invention allows the valve to position its disk at 0 °, which is equivalent to the maximum closing position, without noise or cavitation in this situation.
  • the water not only passes through the edges of the disc, as in the current io blind disc valves, but also through the perforations, so that the flow is distributed between the two paths varying with the angle of closing, decreasing the edges and increasing the perforations, by closing the disc thus allowing a full range of control, not as in the blind disc valves in which the disc cannot be positioned less than 25-30 ° of the opening.
  • the perforations are arranged symmetrically and their number and size depend on the size of the disc and the flow to be controlled.
  • the disc is welded jointly to the axis that moves the actuator (flywheel or electric motor), being able to rotate in vertical planes or between a vertical and a horizontal plane.
  • Figure L Shows the multi-perforated flat disk in the butterfly valve assembly in the direction of the current and in a side view.
  • Figure 2. Shows the disk attached to the axis that rotates it with the arrangement of the perforations.
  • the device consists of a flat disk, part 1, to which an axis, part 3 is welded, which communicates a direction of rotation, allowing the disk to be moved from a vertical plane (maximum closing position) to a horizontal S plane (maximum opening position).
  • the disc is drilled by various through holes between both sides, 2, distributed symmetrically.
  • the entire flow of the fluid passes through its edges.
  • the disc closes in more and more inclined planes, part of the fluid passes through the holes and part through the edges.
  • all the fluid passes through the holes in parallel flow lines, then behaving like a hole plate.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Valves (AREA)
  • Lift Valve (AREA)

Abstract

The invention relates to a butterfly valve comprising a flat multiperforated disc, which, compared to a standard butterfly valve comprising an unperforated disc, has a lower cavitation index. According to the invention, in small opening angles, where standard butterfly valves cannot function, the inventive disc behaves as a multiperforated restriction plate with a very low cavitation index owing to the uniform distribution of the flow. As a result, butterfly valves comprising a flat multiperforated disc have a greater control range than those with an unperforated disc without vibrations or noise being produced in the tube.

Description

DISCO MULTIPERFORADO PLANO PARA VÁLVULAS DE MARIPOSA MULTIPERFORATED FLAT DISK FOR BUTTERFLY VALVES
OBJETO DE LA INVENCIÓNOBJECT OF THE INVENTION
La presente invención se refiere a un disco multiperforado plano como medio para controlar el paso de fluido en una válvula de mariposa convencional ( manual o de control ) con objeto de que la misma pueda posicionarse en ángulos muy cerrados de estrangulamiento, incluso 0°, lo que equivale al disco en posición, vertical, presentando unos índices de cavitación muy inferiores a los de las válvulas con disco ciego y evitando por tanto las nefastas consecuencias de ruido, erosión, vibraciones y roturas que lleva aparejada la cavitación. ° ANTECEDENTES DE A. INVENCIÓN En las plantas industriales (centrales nucleares y térmicas, refinerías, petroquímicas, acerías, cementeras etc.) existen multitud de sistemas formados por tuberías y válvulas por las que circulan diferentes fluidos siendo el agua uno de los más comunes empleados generalmente como medio de refrigeración.The present invention relates to a flat multi-perforated disk as a means to control the flow of fluid in a conventional butterfly valve (manual or control) so that it can be positioned at very closed throttle angles, even 0 °, which is equivalent to the disc in position, vertical, presenting cavitation indexes much lower than those of blind disc valves and therefore avoiding the dire consequences of noise, erosion, vibrations and breakages that the cavitation entails. ° BACKGROUND OF A. INVENTION In industrial plants (nuclear and thermal power plants, refineries, petrochemicals, steelworks, cement plants etc.) there are many systems formed by pipes and valves through which different fluids circulate being water one of the most common employees generally as a cooling medium.
IS Para regular la circulación de estos fluidos se emplean mayoritariamente válvulas entre otros dispositivos posicionadas eή situaciones de estrangulamiento (intermedias entre abierta y cerrada). Dichas posiciones de estrangulamiento están limitadas en todos los tipos de válvulas a que no aparezca el fenómeno de cavitación que provoca serias consecuencias sobre el sistema. t¿> En general para todos los modelos de válvulas y eα particular para las de mariposa con disco ciego, existentes en el mercado, la máxima posición de estrangulamiento equivale a una apertura mínima de 25-30°. Para ángulos menores puede apercer el fenómeno de la cavitación. El autor, basado en su experiencia sobre estos fenómenos y en las pruebas realizadas por ZS separado, con válvulas de mariposa de disco ciego y con orificios de restricción multiperforados, ha unido ambos dispositivos para, desarrollar las ecuaciones que describen el comportamiento de una vávula de mariposa de disco multiperforado. Como dispositivos de regulación de caudal con cierto parecido al objeto de este modelo de utilidad, están los orificios de restricción multiperforados, cuya posición es fija, ¿0 desarrollados por el autor a partir de ensayos en la Central Nuclear de Almaraz, y cuyas ecuaciones y gráficos de comportamiento se han publicado en las revistas técnicas POWER (USA) e INGENIERÍA QUÍMICA (ESPAÑA) y objeto de una ponencia en la Sociedad Nuclear Española (reunión anual), así como las válvulas MONOVAR que constan de dos placas multiperforadas eα posición vertical, una fija y otra deslizante que permite reducir elIS To regulate the circulation of these fluids, mostly valves are used between other positioned devices and throttling situations (intermediate between open and closed). Said throttling positions are limited in all types of valves so that the cavitation phenomenon that causes serious consequences on the system does not appear. t ¿ > In general for all valve models and in particular for those with blind disc butterfly, existing on the market, the maximum throttling position is equivalent to a minimum opening of 25-30 °. For smaller angles the phenomenon of cavitation may occur. The author, based on his experience on these phenomena and on the tests performed by separate ZS, with blind disc butterfly valves and with multi-perforated restriction holes, has joined both devices to develop the equations that describe the behavior of a valve Multiperforated disk butterfly. As flow regulation devices with a certain resemblance to the object of this utility model, there are multi-perforated restriction holes, whose position is fixed, or developed by the author from tests at the Almaraz Nuclear Power Plant, and whose equations and Behavior graphs have been published in the technical journals POWER (USA) and CHEMICAL ENGINEERING (SPAIN) and the subject of a presentation at the Spanish Nuclear Society (annual meeting), as well as the MONOVAR valves consisting of two multi-perforated plates and vertical position, a fixed and a sliding one that allows to reduce the
35 tamaño de los agujeros hasta cerrarlos completamente.35 hole sizes until completely closed.
HOJA DE SUSTITUCIÓN (REGLA 26) El inconveniente de estos dos sistemas es que los orificios de restricción, al no cambiar de posición permiten muy poca variación de caudal y las vávulas MONOVAR tienen uno índices de cavitación , al ir cerrándose los agujeros, superiores a los de las válvulas de mariposa de disco multiperforado.SUBSTITUTE SHEET (RULE 26) The disadvantage of these two systems is that the restriction orifices, because they do not change position, allow very little flow variation and the MONOVAR valves have a cavitation index, as the holes are closed, superior to those of the butterfly disk valves multi-perforated
DESCRIPCIÓN DE LA INVENCIÓNDESCRIPTION OF THE INVENTION
El disco multiperforado, objeto de la invención, permite a la válvula posicionar su disco en 0°, que equivale a la posición de cierre máximo, sin que exista ruido ni cavitación en esta situación. Al ir abriendo el disco , el agua no solo .pasa por los bordes del mismo, como en las válvulas i o actuales de disco ciego, sino también por las perforaciones, de manera que el caudal se reparte entre los dos caminos variando con el ángulo de cierre, disminuyendo el de los bordes y aumentando el de las perforaciones, al ir cerrando el disco permitiendo así un rango de control completo, no como en las válvulas de disco ciego en las que no se puede posicionar el disco a menos de 25-30° de la apertura.The multi-perforated disk, object of the invention, allows the valve to position its disk at 0 °, which is equivalent to the maximum closing position, without noise or cavitation in this situation. When opening the disc, the water not only passes through the edges of the disc, as in the current io blind disc valves, but also through the perforations, so that the flow is distributed between the two paths varying with the angle of closing, decreasing the edges and increasing the perforations, by closing the disc thus allowing a full range of control, not as in the blind disc valves in which the disc cannot be positioned less than 25-30 ° of the opening.
15 Las perforaciones se disponen de forma simétrica y su número y tamaño dependen del tamaño del disco y del caudal a controlar. El disco va soldado solidariamente al eje que mueve el actuador (volante o motor eléctrico), pudiendo girar en planos verticales o entre un plano vertical y otro horizontal.15 The perforations are arranged symmetrically and their number and size depend on the size of the disc and the flow to be controlled. The disc is welded jointly to the axis that moves the actuator (flywheel or electric motor), being able to rotate in vertical planes or between a vertical and a horizontal plane.
DESCRIPCIÓN DE LOS DIBUJOSDESCRIPTION OF THE DRAWINGS
Zθ Figura L- Muestra el disco plano multiperforado en el conjunto de uan vávula de mariposa en el sentido de ia corriente y en una vista lateral. Figura 2.- Muestra el disco unido al eje que lo hace girar con la disposición de las perforaciones.Zθ Figure L- Shows the multi-perforated flat disk in the butterfly valve assembly in the direction of the current and in a side view. Figure 2.- Shows the disk attached to the axis that rotates it with the arrangement of the perforations.
HOJA DE SUSTITUCIÓN (REGLA 26) DESCRIPCIÓN DE UN MODO DE REALIZACIÓN PREFERENTESUBSTITUTE SHEET (RULE 26) DESCRIPTION OF A PREFERRED EMBODIMENT
A la vista de las Figuras 1 y 2 puede observarse que el dispositivo consiste en un disco plano, pieza 1, al que va soldado un eje, pieza 3, que le comunica un sentido de giro, permitiendo mover el disco desde un plano vertical (posición de máximo cierre) a un plano S horizontal (posición de máxima apertura). El disco está taladrado por diversas perforaciones pasantes entre ambas caras, 2, distribuidas de forma simétrica. Cuando el disco está en el plano horizontal todo el caudal del fluido pasa por los bordes del mismo. & A medida que el disco va cerrando en planos, cada vez más inclinados, parte del fluido pasa por los taladros y parte por los bordes. Cuando el disco esté en el plano vertical todo el fluido pasa por los taladros en líneas de flujo paralelas, comportándose entonces como una placa de orificios.In view of Figures 1 and 2, it can be seen that the device consists of a flat disk, part 1, to which an axis, part 3 is welded, which communicates a direction of rotation, allowing the disk to be moved from a vertical plane ( maximum closing position) to a horizontal S plane (maximum opening position). The disc is drilled by various through holes between both sides, 2, distributed symmetrically. When the disk is in the horizontal plane, the entire flow of the fluid passes through its edges. & As the disc closes in more and more inclined planes, part of the fluid passes through the holes and part through the edges. When the disk is in the vertical plane all the fluid passes through the holes in parallel flow lines, then behaving like a hole plate.
HOJA DE SUSTITUCIÓN (REGLA 26) SUBSTITUTE SHEET (RULE 26)

Claims

REIVINDICACIONES
l.-DISCO MULTIPERFORADO PLANO PARA VÁLVULAS DE MARIPOSA constituido por un disco circular (1) al que se le realizan un número simétrico de taladros (2) y con un eje (3) solidariamente soldado al que el correspondiente actuador le comunica un sentido de giro bien en planos verticales si el eje del actuador es vertical o bien entre un plano vertical y otro horizontal, si el eje del actuador es horizontal.l.-MULTIPERFORATED FLAT DISK FOR BUTTERFLY VALVES consisting of a circular disk (1) to which a symmetrical number of drills (2) are made and with a shaft (3) jointly welded to which the corresponding actuator communicates a sense of turn well in vertical planes if the axis of the actuator is vertical or between a vertical plane and another horizontal, if the axis of the actuator is horizontal.
Los taladros (2) al ir cerrando el disco permiten mayor paso de agua que por los bordes del mismo, conduciendo esta en líneas de flujo uniforme que se caracterizan por su bajo nivel de ruido y cavitación.The holes (2) when closing the disk allow greater water flow than the edges of the disk, conducting it in uniform flow lines that are characterized by low noise and cavitation.
HOJA DE SUSTITUCIÓN (REGLA 26) SUBSTITUTE SHEET (RULE 26)
PCT/ES2004/000396 2003-09-12 2004-09-08 Flat multiperforated disc for butterfly valves WO2005026599A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESU200301832 2003-09-12
ES200301832U ES1055962Y (en) 2003-09-12 2003-09-12 MULTIPERFORATED FLAT DISK FOR BUTTERFLY VALVES.

Publications (1)

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WO2005026599A1 true WO2005026599A1 (en) 2005-03-24

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WO (1) WO2005026599A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4530375A (en) * 1979-01-10 1985-07-23 Roger Bey Attenuating rotating valve
EP0503195A1 (en) * 1991-03-11 1992-09-16 Worcester Controls Corporation Ball valve having improved inherent rangeability
US6029702A (en) * 1997-01-21 2000-02-29 Dresser Equipment Group, Inc. Valve with internal diffuser

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4530375A (en) * 1979-01-10 1985-07-23 Roger Bey Attenuating rotating valve
EP0503195A1 (en) * 1991-03-11 1992-09-16 Worcester Controls Corporation Ball valve having improved inherent rangeability
US6029702A (en) * 1997-01-21 2000-02-29 Dresser Equipment Group, Inc. Valve with internal diffuser

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Publication number Publication date
ES1055962U (en) 2004-02-16
ES1055962Y (en) 2004-06-01

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