WO2014072544A1 - Hermetic sealing device for industrial valves - Google Patents

Hermetic sealing device for industrial valves Download PDF

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Publication number
WO2014072544A1
WO2014072544A1 PCT/ES2013/000227 ES2013000227W WO2014072544A1 WO 2014072544 A1 WO2014072544 A1 WO 2014072544A1 ES 2013000227 W ES2013000227 W ES 2013000227W WO 2014072544 A1 WO2014072544 A1 WO 2014072544A1
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WO
WIPO (PCT)
Prior art keywords
base
valve
stem
lip
lip seal
Prior art date
Application number
PCT/ES2013/000227
Other languages
Spanish (es)
French (fr)
Inventor
Miguél MARCO RODADO
Original Assignee
Talleres Gilabert Sorribes S.L.
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 Talleres Gilabert Sorribes S.L. filed Critical Talleres Gilabert Sorribes S.L.
Publication of WO2014072544A1 publication Critical patent/WO2014072544A1/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
    • F16K41/00—Spindle sealings
    • F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
    • F16K41/04—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
    • F16J15/184—Tightening mechanisms
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
    • F16J15/3236—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips with at least one lip for each surface, e.g. U-cup packings
    • 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
    • F16K41/00—Spindle sealings
    • F16K41/02—Spindle sealings with stuffing-box ; Sealing rings

Definitions

  • the present invention is framed within the technical sector of industrial valves, and more specifically in that of the elements intended to provide tightness to them.
  • the invention relates to a hermetic sealing device for the orifice in the valve through which the stem that transmits the movement of the actuator to the shutter slides.
  • valves are one of the most important and most used control elements in industrial facilities, their functions being to regulate, allow or prevent the flow of all kinds of fluids, liquids or gases, which can be from the simplest to the most toxic and corrosive.
  • these circumstances mean that the valves may have to operate in a wide range of pressures and temperatures, so in order to meet the requirements of the industry, throughout the history a wide variety of valve designs have been created, with different sizes. and materials; It is not possible to describe a universal type valve, although as a general rule we can distinguish some main constituent elements of all of them: body, plug, actuator, cover, and stem.
  • the cover or bonnet is the closing element of the valve body, serving as a joint element between the body and the actuator.
  • one or the other valve cover design is used: normal, with extension columns, with bellows, with radiation fins, etc.
  • the axial load of the gaskets is maintained by periodic tightening, but this entails an increase in friction and hysteresis with the consequent deterioration and loss of effectiveness of the valve.
  • the packing box acts radially between the stem and the valve cover to prevent fluid leakage outwards. Continuous valve openings and closures, fluid action, and the effects of pressure and temperature affect the service life of the gaskets.
  • a device that hermetically seals the hole in the base of the lid and insulates the packing box from the action of the fluids existing in the valve body, can improve the tightness and at the same time increase the average time between valve failures.
  • the present invention relates to a device whereby the orifice of the cover where the valve stem slides can be hermetically sealed, and thus protect the packing box from the degrading effects of the fluids circulating through the body from valvule.
  • the device has been designed to be installed in the type of valves for fluids in which a rod transmits the force of the actuator to the plug, and in which the displacement of the rod can be linear, rotary, or a combination of both.
  • the device comprises a flexible lip seal with or without an internal metal spring, a rigid scraper ring with edges on the inner circular perimeter, and a flexible safety retaining washer.
  • the components of the device are installed in housings made in the hole of the stem at the base of the cover inside the valve. These housings are cylindrical concentric to the axis of the hole, the one with the smallest diameter being located deeper in the mouth of the hole at the base of the lid, and being in this housing where the lip gasket that is fixed by the pressure of the outer lip of the board with the wall of its
  • FIG. 1 A preferred embodiment of the hermetic sealing device for industrial valves is shown in the valve cover of Figure 1, and more specifically in Figure 2, which is a detailed extension of the invention shown in Figure 1.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Valves (AREA)
  • Sealing Devices (AREA)

Abstract

The invention comprises a flexible lip joint (6), a rigid scraper ring with edges on the inner perimeter (5), a flexible safety washer for the inner pipe (4), and a bush, installed in the above-mentioned order in the opening in the base of the lid (1) via which the rod (2) of the valve slides. The combined action of the scraper ring (5) and the lip joint (6) hermetically seals the opening of the rod (2) in the lid of the valve (1). One option includes a lip joint (7) in the base of the stuffing box (10), separated from the stuffing (9) by means of a thrust washer (8). In order to increase the tightness, a plurality of lip joints can be installed in series in the respective housings.

Description

DISPOSITIVO DE SELLADO HERMÉTICO PARA VÁLVULAS INDUSTRIALES  HERMETIC SEALING DEVICE FOR INDUSTRIAL VALVES
SECTOR DE LA TÉCNICA  SECTOR OF THE TECHNIQUE
La presente invención se enmarca dentro del sector técnico de las válvulas industriales, y más concretamente en el de los elementos destinados a proporcionar estanqueidad a las mismas. La invención se refiere a un dispositivo de sellado hermético para el orifico en la válvula por el que desliza el vástago que transmite el movimiento del actuador al obturador. ESTADO DE LA TÉCNICA  The present invention is framed within the technical sector of industrial valves, and more specifically in that of the elements intended to provide tightness to them. The invention relates to a hermetic sealing device for the orifice in the valve through which the stem that transmits the movement of the actuator to the shutter slides. STATE OF THE TECHNIQUE
Como es conocido, las válvulas son unos de los elementos de control más importantes y de mayor utilización en las instalaciones industriales, siendo sus funciones las de regular, permitir o impedir el caudal de toda clase de fluidos, líquidos o gases, que pueden ser desde los más simples a los más tóxicos y corrosivos. Estas circunstancias hacen que las válvulas puedan tener que operar en una amplia gama de presiones y temperaturas, por lo que para satisfacer los requerimientos de la industria, a lo largo de la historia han sido creados una gran variedad de diseños de válvulas, con diferentes tamaños y materiales; no pudiéndose describir una válvula de tipo universal, aunque como norma general se puedan distinguir unos elementos principales constitutivos de todas ellas: cuerpo, obturador, actuador, tapa, y vástago.  As is known, the valves are one of the most important and most used control elements in industrial facilities, their functions being to regulate, allow or prevent the flow of all kinds of fluids, liquids or gases, which can be from the simplest to the most toxic and corrosive. These circumstances mean that the valves may have to operate in a wide range of pressures and temperatures, so in order to meet the requirements of the industry, throughout the history a wide variety of valve designs have been created, with different sizes. and materials; It is not possible to describe a universal type valve, although as a general rule we can distinguish some main constituent elements of all of them: body, plug, actuator, cover, and stem.
La tapa o bonete es el elemento de cierre del cuerpo de la válvula, sirviendo a su vez de elemento de unión entre el cuerpo y el actuador. Según sea el grado de estanqueidad deseado y la temperatura de los fluidos de trabajo, es utilizado uno u otro diseño de tapa de válvula: normal, con columnas de extensión, con fuelle de estanqueidad, con aletas de radiación, etc.  The cover or bonnet is the closing element of the valve body, serving as a joint element between the body and the actuator. Depending on the degree of tightness desired and the temperature of the working fluids, one or the other valve cover design is used: normal, with extension columns, with bellows, with radiation fins, etc.
En la tapa se instala la caja de empaquetaduras para impedir que el fluido se escape por el orificio por donde desliza el vástago. El tipo de empaquetadura empleado varía según sea el fluido y las condiciones de presión y temperatura, siendo los materiales más empleados en su fabricación, el teflón, los fluoroelastómeros, y el grafito. PROBLEMA TÉCNICO PLANTEADO  The packing box is installed in the lid to prevent fluid from escaping through the hole through which the rod slides. The type of packing used varies depending on the fluid and the pressure and temperature conditions, being the materials most used in its manufacture, Teflon, fluoroelastomers, and graphite. TECHNICAL PROBLEM PROPOSED
En la industria del proceso o almacenaje de fluidos, las válvulas, manuales o automáticas, son el elemento fundamental de regulación y control.  In the process industry or fluid storage, valves, manual or automatic, are the fundamental element of regulation and control.
Un porcentaje muy alto de los accidentes ocasionados por fallo de componentes en la industria son como consecuencia de las averías de las válvulas. El fallo de una válvula puede provocar graves accidentes, incidentes, y ser origen de la causa de grandes pérdidas económicas.  A very high percentage of accidents caused by failure of components in the industry are as a result of valve failures. The failure of a valve can cause serious accidents, incidents, and be the source of the cause of large economic losses.
El mayor porcentaje de fallos o averías en las válvulas son ocasionados como consecuencia de la degradación de las empaquetaduras, hecho que puede ser la causa de la fuga de fluidos y del bloqueo o la rotura de la válvula. Las fugas más usuales en las empaquetaduras normales se deben a la pérdida de la carga axial por el desgaste, y al choque térmico por la diferencia de  The higher percentage of failures or breakdowns in the valves are caused as a result of the degradation of the gaskets, which may be the cause of fluid leakage and the blockage or breakage of the valve. The most common leaks in normal gaskets are due to loss of axial load due to wear, and thermal shock due to the difference in
1  one
INCORPORACIÓN POR REFERENCIA (REGLA 20.6) coeficientes de dilatación entre el metal del vástago y el material de las empaquetaduras. Otra de las posibles causas del deterioro de las empaquetaduras es como consecuencia de la cavitación, que puede afectar a todo el conjunto de la válvula, provocar corrosión en el vástago y degradar las empaquetaduras, como consecuencia de las vibraciones y de la acción directa del fluido al penetrar por el espacio radial entre el vástago y el orificio en la base de la tapa.INCORPORATION BY REFERENCE (RULE 20.6) coefficients of expansion between the metal of the rod and the material of the gaskets. Another possible cause of the deterioration of the gaskets is as a result of cavitation, which can affect the entire valve assembly, cause corrosion of the stem and degrade the gaskets, as a result of vibrations and direct action of the fluid. by penetrating the radial space between the rod and the hole in the base of the lid.
La carga axial de las empaquetaduras se mantiene mediante el apriete periódico, pero ello conlleva un aumento del rozamiento y de la histéresis con el consiguiente deterioro y pérdida de efectividad de la válvula. The axial load of the gaskets is maintained by periodic tightening, but this entails an increase in friction and hysteresis with the consequent deterioration and loss of effectiveness of the valve.
La caja de empaquetaduras actúa radialmente entre el vástago y la tapa de válvula para impedir las fugas de fluido hacia el exterior. Las continuas aperturas y cierres de válvula, la acción de los fluidos, y los efectos de presión y temperatura afectan la vida útil de las empaquetaduras.  The packing box acts radially between the stem and the valve cover to prevent fluid leakage outwards. Continuous valve openings and closures, fluid action, and the effects of pressure and temperature affect the service life of the gaskets.
Hoy en día se fabrican cajas de empaquetaduras que contienen anillos de teflón rellenos de perfluorelastómero y anillos de grafito, las cuales representan una mejora respecto de las empaquetaduras de teflón. En las empaquetaduras en las que en su fabricación se emplea el grafito, las fugas suelen ser ocasionadas como consecuencia de la corrosión galvánica del vástago en presencia de humedad.  Nowadays, packing boxes containing Teflon rings filled with perfluoroelastomer and graphite rings are manufactured, which represent an improvement over Teflon gaskets. In gaskets where graphite is used in its manufacture, leaks are usually caused as a result of galvanic corrosion of the rod in the presence of moisture.
En el estado actual de la técnica, la caja de empaquetaduras es el componente de las válvulas industriales que requiere un mayor entretenimiento y mantenimiento preventivo; es a la vez la causa del mayor número de reparaciones no programadas que se han de realizar para mantener la estanqueidad y las correctas condiciones de operación de las válvulas.  In the current state of the art, the packing box is the component of the industrial valves that requires greater entertainment and preventive maintenance; It is at the same time the cause of the greater number of unscheduled repairs that have to be performed to maintain the tightness and the correct operating conditions of the valves.
Un dispositivo que selle herméticamente el orifico en la base de la tapa y aisle la caja de empaquetaduras de la acción de los fluidos existentes en el cuerpo de la válvula, puede mejorar la estanqueidad y a la vez incrementar el tiempo medio entre averfas de las válvulas.  A device that hermetically seals the hole in the base of the lid and insulates the packing box from the action of the fluids existing in the valve body, can improve the tightness and at the same time increase the average time between valve failures.
DESCRIPCIÓN DE LA INVENCIÓN DESCRIPTION OF THE INVENTION
La presente invención se refiere a un dispositivo por el que puede ser sellado herméticamente el orificio de la tapa por donde desliza el vástago de la válvula, y de esta forma proteger la caja de empaquetaduras de los efectos degradantes de los fluidos que circulan por el cuerpo de la válvula. El dispositivo ha sido diseñado para ser instalado en el tipo de válvulas para fluidos en las que un vástago transmite la fuerza del actuador al obturador, y en los que el desplazamiento del vástago puede ser lineal, rotatorio, o una combinación de ambos. Ef dispositivo comprende una junta flexible de labios con o sin resorte metálico interno, un anillo rascador rfgido con aristas en el perímetro circular interno, y una arandela flexible de retén de seguridad.  The present invention relates to a device whereby the orifice of the cover where the valve stem slides can be hermetically sealed, and thus protect the packing box from the degrading effects of the fluids circulating through the body from valvule. The device has been designed to be installed in the type of valves for fluids in which a rod transmits the force of the actuator to the plug, and in which the displacement of the rod can be linear, rotary, or a combination of both. The device comprises a flexible lip seal with or without an internal metal spring, a rigid scraper ring with edges on the inner circular perimeter, and a flexible safety retaining washer.
Los componentes del dispositivo se instalan en unos alojamientos practicados en el orificio del vástago en la base de la tapa en el interior de la válvula. Estos alojamientos son cilindricos concéntricos al eje del orificio, estando el de menor diámetro situado a mayor profundidad en la boca del orificio en la base de la tapa, y siendo en este alojamiento donde se inserta la junta de labios que queda fijada por la presión del labio exterior de la junta con la pared de su  The components of the device are installed in housings made in the hole of the stem at the base of the cover inside the valve. These housings are cylindrical concentric to the axis of the hole, the one with the smallest diameter being located deeper in the mouth of the hole at the base of the lid, and being in this housing where the lip gasket that is fixed by the pressure of the outer lip of the board with the wall of its
INCORPORACIÓN POR REFERENCIA (REGLA 20.6) alojamiento, mientras que el labio interior presiona el vástago. En el alojamiento cilindrico de mayor diámetro se instala el anillo separador con aristas en el perímetro interno, y en una acanaladura practicada en este alojamiento se fija la arandela flexible de retén de seguridad que impide que el anillo separador se desplace de su alojamiento. INCORPORATION BY REFERENCE (RULE 20.6) accommodation, while the inner lip presses the stem. In the cylindrical housing of greater diameter the separating ring with edges is installed in the internal perimeter, and in a groove made in this housing the flexible safety retaining washer that prevents the separating ring from moving from its housing is fixed.
Opcionaimente, se podrá instalar una junta de labios en un alojamiento dispuesto en la base de la caja de empaquetaduras.  Optionally, a lip seal can be installed in a housing arranged in the base of the packing box.
En algunos tipos de válvula es posible incrementar la estanqueidad instalando una pluralidad de juntas de labios en serie en los alojamientos del dispositivo.  In some types of valves it is possible to increase the tightness by installing a plurality of lip seals in series in the device housings.
En los casos de fluidos gases o líquidos, de baja densidad y/o viscosidad, y en las condiciones en las que se produce vaporización, el fluido puede pasar a través del estrechamiento del espacio existente entre el vástago y las aristas en forma de cresta del anillo rascador, donde experimenta una ligera aceleración y caída de presión por efecto Venturi, con un posterior incremento de presión una vez atravesado el citado estrechamiento, lo que provoca que el fluido sea proyectado a presión en la concavidad entre los labios de la junta de labios; produciendo una expansión homogénea y correcta de la junta de labios, y el sellado hermético del espacio radial entre el vástago y la pared del orificio del vástago.  In the case of gas or liquid fluids, of low density and / or viscosity, and in the conditions in which vaporization occurs, the fluid can pass through the narrowing of the space between the rod and the crest-shaped edges of the scraper ring, where it experiences a slight acceleration and pressure drop due to Venturi effect, with a subsequent increase in pressure once the aforementioned narrowing is passed, which causes the fluid to be projected under pressure into the concavity between the lips of the lip seal ; producing a homogeneous and correct expansion of the lip seal, and the hermetic seal of the radial space between the stem and the wall of the stem hole.
Cuando las condiciones son de una elevada densidad y/o viscosidad del fluido y no se presenta vaporización, el anillo rascador con aristas actúa de barrera física entre la junta de labios y el fluido en el cuerpo de la válvula, separando e impidiendo una acción heterogénea o irregular del fluido en la junta de labios, que la pudiera dañar, deformar, o reducir su vida útil. Además, las aristas del anillo rascador realizan un barrido del fluido adherido en el vástago cuando éste realiza un desplazamiento lineal.  When the conditions are of a high density and / or viscosity of the fluid and there is no vaporization, the scraping ring with edges acts as a physical barrier between the lip seal and the fluid in the valve body, separating and preventing a heterogeneous action or irregular fluid in the lip seal, which could damage, deform, or reduce its useful life. In addition, the edges of the scraper ring perform a scan of the fluid adhered to the rod when it performs a linear displacement.
Cuando la presión en la boca del orificio del vástago en la base de la tapa, dentro del cuerpo de válvula, es igual o inferior a la presión en el interior del orificio del vástago, la estanqueidad requerida se consigue al estar los labios de la junta de labios forzados radialmente al contacto con las superficies antagonistas.  When the pressure in the mouth of the orifice of the stem at the base of the cover, inside the valve body, is equal to or less than the pressure inside the orifice of the stem, the required sealing is achieved by being the lips of the joint of lips forced radially on contact with the antagonistic surfaces.
Cuando hay una presión superior en la boca del orificio del vástago en la base de la tapa dentro del cuerpo de válvula, respecto de la existente en el interior del orificio del vástago, los labios de la junta de labios se expanden y presionan radialmente las superficies antagonistas, el vástago y la pared de su alojamiento, sellando herméticamente el orificio del vástago de la válvula.  When there is a higher pressure in the mouth of the stem hole at the base of the lid inside the valve body, compared to that existing inside the hole of the stem, the lips of the lip seal expand and radially press the surfaces antagonists, the stem and the wall of its housing, hermetically sealing the orifice of the valve stem.
DESCRIPCIÓN DE LAS FIGURAS DESCRIPTION OF THE FIGURES
Se mantiene la correspondencia en la numeración de los elementos en todas las figuras. El dibujo de la figura 1 es una representación esquemática de un corte en alzado de una posible realización de la invención. En (1) se representa la tapa de válvula, (2) es el vástago, (3) es la boca del orificio del vástago en la base de la tapa, (4) es la arandela flexible de retén de seguridad, (5) es anillo rascador con aristas en el perímetro interno, (6) es una junta de labios, (7) es una junta de labios en la base de la caja de empaquetaduras, (8) es una arandela tope, (9) representa las empaquetaduras, (10) es la caja de empaquetaduras, (11) es un  Correspondence is maintained in the numbering of the elements in all figures. The drawing of Figure 1 is a schematic representation of an elevation of a possible embodiment of the invention. In (1) the valve cover is shown, (2) it is the stem, (3) it is the mouth of the stem hole in the base of the cover, (4) it is the flexible safety retaining washer, (5) it is a scraper ring with edges on the inner perimeter, (6) it is a lip seal, (7) it is a lip seal at the base of the gasket box, (8) it is a stop washer, (9) it represents the gaskets , (10) is the packing box, (11) is a
INCORPORACIÓN POR REFERENCIA (REGLA 20.6) esparrago de prensa, (12) es el caequillo de la prensa, (13) es la prensa de empaquetaduras, (14) es una de las tuercas de la prensa. INCORPORATION BY REFERENCE (RULE 20.6) press stud, (12) is the press bushing, (13) is the packing press, (14) is one of the press nuts.
El dibujo de la figura 2 es un detalle del dispositivo en la válvula representada en la figura 1. The drawing of figure 2 is a detail of the device in the valve shown in figure 1.
En el dibujo de la figura 3 se representa mediante unas flechas (†), el flujo del fluido a través del estrechamiento entre las aristas del anillo rascador (5), y el vástago (2), y hacia la concavidad de la junta de labios (6); cuando se produce un incremento de presión (ΔΡ), en la boca del orificio del vástago (3), en la base de la tapa de la válvula (1) en el interior de la válvula. In the drawing of figure 3, the flow of the fluid through the narrowing between the edges of the scraper ring (5), and the rod (2), and towards the concavity of the lip seal is represented by arrows (†) (6); when an increase in pressure (ΔΡ) occurs, at the mouth of the stem hole (3), at the base of the valve cover (1) inside the valve.
El dibujo de la figura 4 es un detalle de una posible realización de la invención provista de una pluralidad de juntas de labios instaladas en serie en sus respectivos alojamientos. En (1) se representa la tapa de válvula, (2) es el vástago, (3) es la boca del orificio del vástago en la base de la tapa, (4) es la arandela flexible de retén de seguridad, (5) es el anillo rascador con aristas en el perímetro interno, (6) son las juntas de labios, (7) son las juntas de labios en la base de la caja de empaquetaduras, (8) es una arandela tope, (9) representa las empaquetaduras, (10) es la caja de empaquetaduras.  The drawing of Figure 4 is a detail of a possible embodiment of the invention provided with a plurality of lip seals installed in series in their respective housings. In (1) the valve cover is shown, (2) it is the stem, (3) it is the mouth of the stem hole in the base of the cover, (4) it is the flexible safety retaining washer, (5) is the scraper ring with edges on the inner perimeter, (6) are the lip seals, (7) are the lip seals at the base of the packing box, (8) it is a stop washer, (9) represents the gaskets, (10) is the gasket box.
El dibujo de la figura 5 es un ejemplo de aplicación de la invención en una válvula de seguridad.  The drawing of Figure 5 is an example of application of the invention in a safety valve.
El dibujo de la figura 6 es un detalle del dispositivo representado en la figura 5. DESCRIPCIÓN DE UNA REALIZACIÓN PREFERIDA  The drawing of figure 6 is a detail of the device shown in figure 5. DESCRIPTION OF A PREFERRED EMBODIMENT
Una realización preferida del dispositivo de sellado hermético para válvulas industriales está representada en la tapa de válvula de la figura 1 , y de forma más específica en la figura 2, que es una ampliación en detalle de la invención representada en la figura 1.  A preferred embodiment of the hermetic sealing device for industrial valves is shown in the valve cover of Figure 1, and more specifically in Figure 2, which is a detailed extension of the invention shown in Figure 1.
Los componentes del dispositivo se instalan en los alojamientos practicados en el orificio del vástago (2) a través de la boca del orificio del vástago (3) en la base de la tapa de válvula (1). Estos alojamientos son cilindricos, de mayor diámetro, y concéntricos al eje del orificio del vástago; estando el de menor diámetro situado a mayor profundidad en la boca del orificio (3), en la base de la tapa (1) en el interior de la válvula, y siendo en este alojamiento de menor diámetro donde se inserta la junta de labios (6), que queda fijada por la presión del labio exterior de la junta con la pared de su alojamiento, mientras que el labio interior presiona el vástago (2). En el alojamiento cilindrico de mayor diámetro se instala el anillo rascador con aristas en el perímetro interno (5), y en una acanaladura practicada en este alojamiento se fija la arandela flexible de retén de seguridad (4), que impide que el anillo rascador (5), se desplace de su alojamiento. En un alojamiento practicado al efecto en la base de la caja de empaquetaduras (10), se inserta una junta de labios (7), separada por una arandela tope (8), de las empaquetaduras (9).  The components of the device are installed in the housings made in the orifice of the stem (2) through the mouth of the orifice of the stem (3) at the base of the valve cover (1). These housings are cylindrical, larger in diameter, and concentric to the axis of the stem hole; the one with the smallest diameter being located at a greater depth in the mouth of the hole (3), at the base of the cover (1) inside the valve, and being in this smaller diameter housing where the lip seal ( 6), which is fixed by the pressure of the outer lip of the joint with the wall of its housing, while the inner lip presses the rod (2). In the cylindrical housing of greater diameter the scraper ring with edges is installed in the internal perimeter (5), and in a groove made in this housing the flexible safety retaining washer (4) is fixed, which prevents the scraper ring ( 5), move from your accommodation. In a housing made for this purpose at the base of the packing box (10), a lip seal (7), separated by a stop washer (8), is inserted from the gaskets (9).
Son independientes del objeto de la invención los materiales empleados en la fabricación de los componentes del dispositivo de sellado hermético para tapas de válvulas industriales, las formas y dimensiones de los mismos y todos los detalles accesorios que no afectan a la esencialidad de la invención.  The materials used in the manufacture of the hermetic sealing device components for industrial valve covers, the shapes and dimensions thereof and all accessory details that do not affect the essentiality of the invention are independent of the object of the invention.
INCORPORACIÓN POR REFERENCIA (REGLA 20.6) INCORPORATION BY REFERENCE (RULE 20.6)

Claims

REIVINDICACIONES
1. - Dispositivo de sellado hermético para válvulas industriales que comprende una junta de labios (6), un anillo rascador con aristas en el perímetro interno (5), y una arandela de retén de seguridad (4), instalados en ese orden en el orificio del vástago (2) en la base de la tapa de válvula (1); caracterizado porque el anillo rascador con aristas actúa de barrera física entre la junta de labios y el fluido en el cuerpo de la válvula, estando los labios de la junta de labios forzados radialmente al contacto con las superficies antagonistas; y cuando el fluido, por condiciones de presión o densidad, puede pasar a través del estrechamiento del espacio existente entre el vástago (2) y las aristas en forma de cresta del anillo rascador (5), es proyectado a presión en la concavidad de la junta de labios (6), expandiéndola, y sellando herméticamente el orificio del vástago de la válvula.  1. - Airtight sealing device for industrial valves comprising a lip seal (6), a scraper ring with edges on the internal perimeter (5), and a safety retaining washer (4), installed in that order in the stem hole (2) at the base of the valve cover (1); characterized in that the scraping ring with edges acts as a physical barrier between the lip seal and the fluid in the valve body, the lips of the lip seal being forced radially in contact with the opposing surfaces; and when the fluid, due to pressure or density conditions, can pass through the narrowing of the space between the rod (2) and the crest-shaped edges of the scraper ring (5), it is projected under pressure into the concavity of the lip seal (6), expanding it, and hermetically sealing the orifice of the valve stem.
2. - Dispositivo de sellado hermético para válvulas industriales, según la reivindicación 1 , caracterizado por de la instalación en la base de la caja de empaquetaduras (10), de una junta de labios (7) y una arandela tope (8).  2. - Hermetic sealing device for industrial valves, according to claim 1, characterized by the installation in the base of the packing box (10), a lip seal (7) and a stop washer (8).
3. - Dispositivo de sellado hermético para válvulas industriales, según la reivindicación 1 , caracterizado por disponer de una pluralidad de juntas de labios (6), instaladas en serie de forma conjunta en el alojamiento en el orificio del vástago (2), en la base de la tapa de válvula (1).  3. - Hermetic sealing device for industrial valves, according to claim 1, characterized by having a plurality of lip seals (6), installed in series together in the housing in the hole of the stem (2), in the base of the valve cover (1).
4. - Dispositivo de sellado hermético para válvulas industriales, según la reivindicación 1 , caracterizado por disponer de una pluralidad de juntas de labios (7), instaladas en serie de forma conjunta en el alojamiento en la base de la caja de empaquetaduras (10), y separadas de las empaquetaduras (9) por una arandela tope (8).  4. - Hermetic sealing device for industrial valves, according to claim 1, characterized by having a plurality of lip seals (7), installed in series together in the housing at the base of the packing box (10) , and separated from the gaskets (9) by a stop washer (8).
PCT/ES2013/000227 2012-11-12 2013-10-03 Hermetic sealing device for industrial valves WO2014072544A1 (en)

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ES201201150A ES2467490B1 (en) 2012-11-12 2012-11-12 Hermetic sealing device for industrial valves

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Cited By (3)

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CN105626869A (en) * 2016-02-29 2016-06-01 苏州纽威阀门股份有限公司 Sealing structure and gate valve with sealing structure
WO2017098622A1 (en) * 2015-12-10 2017-06-15 三菱電機株式会社 Valve device
WO2017221064A3 (en) * 2016-06-20 2018-02-08 Novotema Spa Dual lip seal with controlled variable deformation

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US4364542A (en) * 1981-06-18 1982-12-21 Acf Industries, Incorporated Packing gland assembly
US6161838A (en) * 1998-03-09 2000-12-19 Bal Seal Engineering, Co, Inc. Cartridge seal stack
US20020096218A1 (en) * 2001-01-23 2002-07-25 Cooper Cameron Corporation; Stem seal pressure telltale
US20040129912A1 (en) * 2002-12-24 2004-07-08 Christophe Promper Control valve, in particular plug valve with sealing system

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Publication number Priority date Publication date Assignee Title
FR1000069A (en) * 1949-10-28 1952-02-07 Cfcmug Cable gland
US4364542A (en) * 1981-06-18 1982-12-21 Acf Industries, Incorporated Packing gland assembly
US6161838A (en) * 1998-03-09 2000-12-19 Bal Seal Engineering, Co, Inc. Cartridge seal stack
US20020096218A1 (en) * 2001-01-23 2002-07-25 Cooper Cameron Corporation; Stem seal pressure telltale
US20040129912A1 (en) * 2002-12-24 2004-07-08 Christophe Promper Control valve, in particular plug valve with sealing system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017098622A1 (en) * 2015-12-10 2017-06-15 三菱電機株式会社 Valve device
JPWO2017098622A1 (en) * 2015-12-10 2018-06-21 三菱電機株式会社 Valve device
CN105626869A (en) * 2016-02-29 2016-06-01 苏州纽威阀门股份有限公司 Sealing structure and gate valve with sealing structure
WO2017221064A3 (en) * 2016-06-20 2018-02-08 Novotema Spa Dual lip seal with controlled variable deformation

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ES2467490A1 (en) 2014-06-12

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