ES2886265B2

ES2886265B2 - WATER FLOW REDUCING DEVICE FOR VITAL MINIMUM IN SUPPLY VALVES AND METER BATTERIES

Info

Publication number: ES2886265B2
Application number: ES202000142A
Authority: ES
Inventors: Alcaraz Domingo Carrilero
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2022-05-17
Anticipated expiration: 2040-10-13
Also published as: ES2886265A1

Description

DESCRIPCIÓNDESCRIPTION

Dispositivo reductor de caudal de agua para mínimo vital en válvulas de acometida y baterías de contadoresWater flow reduction device for vital minimum in connection valves and meter batteries

Sector de la técnicaTechnical sector

La presente invención se encuadra dentro del sector correspondiente al suministro de agua para consumo humano y se destina a la limitación del caudal de suministro, sin que pueda haber manipulación no autorizada por la empresa suministradora del servicio.The present invention falls within the sector corresponding to the supply of water for human consumption and is intended to limit the flow of supply, without the possibility of unauthorized manipulation by the company supplying the service.

Estado de la técnicaState of the art

Cuando una compañía de aguas corta el suministro a un usuario debe tener la máxima garantía posible de que ninguna persona ajena a dicha compañía puede manipular el dispositivo de corte para reanudar ilegalmente el suministro.When a water company cuts off the supply to a user, it must have the maximum possible guarantee that no person outside the company can manipulate the cutting device to illegally resume supply.

Por otra parte puede darse la circunstancia de que normativas específicas basadas en legislación referente al derecho de acceso al agua prohíba el corte total del suministro de agua a un usuario y la consiguiente privación de un bien considerado esencial. En este caso se permite el suministro de lo que se conoce como un mínimo vital, que suele corresponder al consumo de una determinada cantidad límite diaria que establezca la normativa, en caso de haberla.On the other hand, the circumstance may arise that specific regulations based on legislation regarding the right of access to water prohibit the total cut-off of the water supply to a user and the consequent deprivation of a good considered essential. In this case, the supply of what is known as a vital minimum is allowed, which usually corresponds to the consumption of a certain daily limit amount established by the regulations, if any.

En la actualidad existen diversos dispositivos diseñados para reducir el caudal de suministro, que según su funcionamiento pueden clasificarse en tres grupos:There are currently various devices designed to reduce the supply flow rate, which can be classified into three groups according to their operation:

a) dispositivos que impiden físicamente la maniobra de apertura o cierre de la válvula de cortea) devices that physically prevent the opening or closing maneuver of the shut-off valve

b) dispositivos que obturan el paso de agua a través de la válvula de corte u otro punto de la instalaciónb) devices that block the passage of water through the shut-off valve or other point of the installation

c) dispositivos que combinan ambas funcionesc) devices that combine both functions

Continuamente surgen nuevos diseños que tratan de incrementar la inviolabilidad de dispositivos reductores de caudal frente a manipulaciones indeseadas, como es el caso de la presente invención, y que puede clasificarse como dispositivo que obtura el paso de agua a través de la válvula de corte u otro punto de la instalación, sin impedir la maniobra de apertura o cierre de la citada válvula y resultando de instalación sencilla y adaptable a las dimensiones de válvulas correspondientes y a los valores de mínimo vital requeridos.New designs are continually emerging that try to increase the inviolability of flow-reducing devices against unwanted manipulations, as is the case with the present invention, and which can be classified as a device that blocks the passage of water through the cut-off valve or other installation point, without impeding the opening or closing maneuver of the aforementioned valve and resulting in a simple installation that can be adapted to the corresponding valve dimensions and the required vital minimum values.

Explicación de la invenciónExplanation of the invention

El dispositivo aquí expuesto comprende básicamente dos componentes: el reductor de caudal en sí, a instalar en válvula, y el útil para montaje y desmontaje de uso exclusivo para Compañías de Aguas o personal autorizado.The device presented here basically comprises two components: the flow reducer itself, to be installed in the valve, and the assembly and disassembly tool for the exclusive use of Water Companies or authorized personnel.

El dispositivo reductor se instala entre la válvula de entrada a contador y el racor de entrada a contador mediante roscas adecuadas para estas conexiones. La operación de montaje y desmontaje requiere del uso de un útil específico.The reducing device is installed between the meter inlet valve and the meter inlet fitting using suitable threads for these connections. The assembly and disassembly operation requires the use of a specific tool.

El dispositivo reductor incluye los componentes listados a continuación: The reducer device includes the components listed below:

• Cuerpo exterior antifraude• External anti-fraud body

• Tapa de cierre• Closing cover

• Corona• Crown

• Rosca guía• Guide thread

• Limitador de caudal• Flow limiter

• Tapón• Stopper

• Eje• Axis

• Volante• Steering wheel

• Juntas de estanqueidad varias• Various sealing gaskets

El eje y el volante forman parte del útil de desbloqueo del dispositivo.The shaft and the handwheel are part of the device release tool.

El cuerpo exterior antifraude es una pieza con un vaciado interior en el que se realiza el montaje de los componentes del dispositivo reductor. En el exterior dispone de un tramo de mayor diámetro con acabado superficial moleteado que permite un mejor agarre durante la operación de montaje o desmontaje del dispositivo. En el interior, la sección de más diámetro incluye una rosca hembra para unión con la tapa de cierre.The anti-fraud exterior body is a piece with an interior hollowing in which the components of the reduction device are assembled. On the outside it has a larger diameter section with a knurled surface finish that allows a better grip during the device assembly or disassembly operation. Inside, the section with the largest diameter includes a female thread for union with the closing cap.

La tapa de cierre está formada por dos tramos rosca macho. La rosca de mayor diámetro realiza una unión sólida de la tapa con el cuerpo exterior antifraude. La rosca de menor diámetro es del mismo tipo que la rosca que emplea la válvula para su conexión a contador, ya que su función es permitir el conexionado de los componentes habituales en instalación de contadores. Por otra parte, en el extremo que queda alojado dentro del cuerpo se mecaniza un perfil dentado a modo de trinquete. En la cara contraria a este trinquete se dispone un taladro para alojamiento de un tetón del volante.The closing cap is made up of two male threaded sections. The larger diameter thread makes a solid union of the cap with the anti-fraud outer body. The smaller diameter thread is of the same type as the thread used by the valve for its connection to the meter, since its function is to allow the connection of the usual components in meter installation. On the other hand, at the end that is housed inside the body, a ratchet-like toothed profile is machined. On the face opposite to this pawl there is a hole for housing a lug of the steering wheel.

La corona queda situada al fondo del cuerpo exterior. Sus paredes exteriores son lisas e incluye una ranura para alojar una junta tórica que proporciona estanqueidad al paso de agua. En su interior quedan instaladas el resto de piezas del dispositivo (rosca guía, tapón, limitador de caudal y juntas de estanqueidad). La cara contigua a la tapa de cierre lleva mecanizado igualmente un perfil dentado a modo de trinquete. La corona está montada de manera que puede girar libremente en el interior del cuerpo y además realizar un desplazamiento axial que permite que corona y tapa de cierre puedan actuar como un trinquete, permitiendo el giro solidario de ambas en un sentido e impidiéndolo en el contrario.The crown is located at the bottom of the outer body. Its outer walls are smooth and it includes a groove to house an O-ring that provides tightness to the passage of water. The rest of the device parts are installed inside it (guide thread, plug, flow limiter and sealing gaskets). The face next to the closing cover also has a ratchet-like toothed profile machined. The crown is mounted in such a way that it can rotate freely inside the body and also carry out an axial displacement that allows the crown and closing cap to act as a ratchet, allowing the joint rotation of both in one direction and preventing it in the opposite.

La rosca guía es un casquillo cilíndrico con valona que dispone de ranuras para alojamiento de juntas de estanqueidad en la superficie exterior y en su interior una rosca hembra que permite el conexionado del eje del útil de desbloqueo. Esta rosca hembra es de un tipo poco común, de forma que solamente una rosca muy concreta pueda emplearse en esta pieza. La rosca guía queda alojada en el interior de la corona. Si fuera necesario se puede extraer la rosca guía para limpieza, mantenimiento o sustitución por otra pieza de igual o diferente rosca que coincida con la del eje del útil de desbloqueo.The guide thread is a cylindrical bushing with a flange that has grooves for housing sealing gaskets on the outer surface and inside a female thread that allows the connection of the release tool shaft. This female thread is of an unusual type, so that only a very specific thread can be used in this part. The guide thread is housed inside the crown. If necessary, the guide thread can be removed for cleaning, maintenance or substitution with another part with the same or different thread that coincides with that of the unlocking tool shaft.

El limitador de caudal es un disco que se aloja en el interior de la corona justo antes de la rosca guía. El disco lleva una o varias perforaciones en un patrón tal que permita el paso del caudal establecido como mínimo vital según la normativa de aplicación. Este mínimo vital puede variar según la normativa, por lo que el patrón de la perforación se adapta a esta circunstancia. El limitador de caudal puede desmontarse para limpieza, mantenimiento, sustitución o modificación por cambio en valor de mínimo vital exigido. The flow limiter is a disc that is housed inside the crown just before the guide thread. The disk has one or more perforations in a pattern that allows the passage of the flow established as a vital minimum according to the applicable regulations. This vital minimum can vary according to regulations, so the drilling pattern is adapted to this circumstance. The flow limiter can be disassembled for cleaning, maintenance, substitution or modification due to a change in the minimum vital value required.

El eje forma parte de útil de desbloqueo. Está formado por dos tramos separados por una valona. El tramo liso se aloja en el volante, quedando fijado en su posición con un pasador. El extremo roscado se inserta en la rosca guía del dispositivo antifraude. Esta acción hace que la corona se vea forzada a apoyarse contra la tapa de cierre.The shaft is part of the release tool. It is made up of two sections separated by a wall. The smooth section is housed in the steering wheel, being fixed in position with a pin. The threaded end is inserted into the guide thread of the anti-fraud device. This action causes the crown to be forced against the closure cap.

El tapón se rosca en el interior de la corona. Su función es mantener ensamblados el limitador de caudal, la rosca guía y las juntas planas para estanqueidad.The cap is screwed inside the crown. Its function is to keep the flow limiter, the guide thread and the flat gaskets for sealing assembled.

El volante está mecanizado de manera que permita el montaje del tramo liso del eje. Dispone en la cara inferior de un tetón que hay que hacer coincidir con el correspondiente taladro practicado en la tapa de cierre y que facilita la transmisión del par necesario para montar o desmontar el dispositivo reductor, impidiendo el deslizamiento del volante respecto a la tapa de cierre. El volante dispone de un vaciado de dimensiones adecuadas para alojar en su interior la rosca macho de la tapa de cierre para el correcto posicionamiento del volante.The flywheel is machined in such a way that it allows the assembly of the smooth section of the shaft. It has a lug on the lower face that must be matched with the corresponding hole in the closing cover and that facilitates the transmission of the necessary torque to assemble or disassemble the reduction device, preventing the steering wheel from slipping with respect to the closing cover. . The steering wheel has a hollow of suitable dimensions to house inside the male thread of the closing cap for the correct positioning of the steering wheel.

La instalación del dispositivo resulta en extremo sencilla. La corona debe quedar roscada a la válvula realizando el giro de accionamiento a través del cuerpo. La corona por sí sola no puede girar de forma solidaria al cuerpo, pero el empuje axial requerido para hacer la instalación empuja la corona a través del cuerpo hasta quedar unida a la tapa de cierre, que sí gira solidariamente con el cuerpo. La torsión aplicada al cuerpo y, por tanto, a la tapa de cierre, puede transmitirse a la corona gracias al trinquete. De esta manera se logra roscar el dispositivo en la válvula.Installation of the device is extremely simple. The crown must be screwed to the valve making the activation turn through the body. The crown by itself cannot rotate integrally with the body, but the axial thrust required for installation pushes the crown through the body until it is attached to the closing cover, which does rotate integrally with the body. The torque applied to the body, and therefore to the end cap, can be transmitted to the crown thanks to the ratchet. In this way it is possible to screw the device into the valve.

Sin embargo no resulta posible realizar la operación inversa: al cambiar el sentido de giro, las cuñas del trinquete no se traban sino que resbalan entre ellas y tienden a separar la corona de la tapa de cierre. De esta manera no es posible aplicar fuerza de torsión alguna en la corona, y como consecuencia no es posible separar el dispositivo de la válvula.However, it is not possible to carry out the reverse operation: when changing the direction of rotation, the pawl wedges do not lock but instead slide between them and tend to separate the crown from the closure cap. In this way it is not possible to apply any torsional force on the crown, and as a consequence it is not possible to separate the device from the valve.

Para poder desmontar el dispositivo debe ensamblarse el útil de desbloqueo, cuyo eje roscado fuerza a que la corona y la tapa de cierre permanezcan unidas incluso en el sentido de desbloqueo del triquete, como si se tratara de un embrague. De esta manera sí es posible transmitir la fuerza de torsión desde el cuerpo a la corona para desmontar el dispositivo.To be able to disassemble the device, the release tool must be assembled, whose threaded shaft forces the crown and the closure cap to remain joined even in the direction of unlocking the pawl, as if it were a clutch. In this way it is possible to transmit the torque from the body to the crown to disassemble the device.

El perfil de rosca del eje es de un tipo poco habitual, por lo que resulta sumamente improbable que personal no autorizado disponga de un útil similar para manipular el dispositivo probando diferentes roscas comerciales, lo que proporciona una elevada seguridad al sistema ideado. The thread profile of the shaft is of an unusual type, so it is extremely unlikely that unauthorized personnel have a similar tool to manipulate the device by testing different commercial threads, which provides high security to the system designed.

Una vez instalado el dispositivo reductor de caudal entre la válvula de entrada a contador y el propio contador, el caudal de agua se ve efectivamente limitado y solamente permite el paso de un limitado volumen diario de agua, independientemente del grado de apertura de las válvulas de contador.Once the flow reducing device is installed between the meter inlet valve and the meter itself, the water flow is effectively limited and only allows the passage of a limited daily volume of water, regardless of the degree of opening of the valves. counter.

Breve descripción de los dibujosBrief description of the drawings

Para complementar la descripción que se está realizando y con objeto de ayudar a una mejor comprensión de las características de la invención, se acompaña como parte integrante de dicha descripción un juego de dibujos con carácter ilustrativo y no limitativo representando lo siguiente:To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, a set of illustrative and non-limiting drawings is attached as an integral part of said description, representing the following:

Figura 1. Muestra una vista de corte del dispositivo reductor de caudal en posición de alzado que permite visualizar los componentes ensamblados, numerados del 1 al 9, y detalles de interés identificados como A, A’, B y B’. Figure 1. Shows a sectional view of the flow reducer device in a raised position that allows visualizing the assembled components, numbered from 1 to 9, and details of interest identified as A, A', B and B'.

Figura 2. Vista en alzado del dispositivo reductor de caudal.Figure 2. Elevation view of the flow reducer device.

Figura 3. Muestra una vista de explosionado del conjunto del dispositivo reductor de caudal. Figura 4. Muestra dos vistas en perspectiva del cuerpo exterior antifraude en el cual se ensamblan los componentes del dispositivo.Figure 3. Shows an exploded view of the flow-reducing device assembly. Figure 4. Shows two perspective views of the anti-fraud outer body in which the components of the device are assembled.

Figura 5. Muestra dos vistas en perspectiva de la corona, de manera que se muestra claramente la rosca de conexión a válvula en una y el perfil dentado en la otra.Figure 5. Shows two perspective views of the crown, so that the valve connection thread is clearly shown in one and the toothed profile in the other.

Figura 6. Muestra dos vistas en perspectiva de la tapa de cierre.Figure 6. Shows two perspective views of the closing cover.

Figura 7. Muestra dos vistas en perspectiva de la rosca guía.Figure 7. Shows two perspective views of the guide thread.

Figura 8. Muestra dos vistas en perspectiva del tapón.Figure 8. Shows two perspective views of the cap.

Figura 9. Muestra una vista en perspectiva del limitador de caudal instalado en el dispositivo. La cantidad y posición de los taladros es orientativa, ya que dependerá del mínimo vital requerido en cada caso.Figure 9. Shows a perspective view of the flow limiter installed in the device. The number and position of the holes is indicative, since it will depend on the vital minimum required in each case.

Figura 10. Muestra dos vistas en perspectiva del eje del útil de desbloqueo.Figure 10. Shows two perspective views of the axis of the release tool.

Figura 11. Muestra dos vistas en perspectiva de volante, que forma parte del útil de desbloqueo.Figure 11. Shows two perspective views of the steering wheel, which forms part of the unlocking tool.

Figura 12. Muestra una vista en perspectiva del útil de desbloqueo con numeración de componentes como 10 y 11, siguiendo el orden de la numeración iniciada en la figura 1.Figure 12. Shows a perspective view of the release tool with component numbers as 10 and 11, following the order of the numbering started in figure 1.

Realización preferente de la invenciónPreferred embodiment of the invention

La invención incluye el dispositivo reductor de caudal, mostrado en las figuras 1, 2 y 3, y un útil de desbloqueo, mostrado en la figura 12.The invention includes the flow reducer device, shown in figures 1, 2 and 3, and an unlocking tool, shown in figure 12.

La invención se materializa como un cuerpo (1) que actúa como carcasa para ensamblaje del resto de componentes del dispositivo, exceptuando los que forman el útil de desbloqueo.The invention takes the form of a body (1) that acts as a casing for assembling the rest of the device's components, except for those that make up the unlocking tool.

La conexión del dispositivo a la rosca de la válvula se realiza mediante la rosca hembra (B’) de la corona (2), que resulta ser una pieza diseñada y montada de tal manera en el interior del cuerpo que la fuerza de torsión necesaria para roscar la corona a la válvula no se transmite directamente del cuerpo (1) a la corona (2), sino a través de otra pieza intermedia que resulta ser la tapa de cierre (3). Estas dos piezas están mecanizadas de tal manera que forman un trinquete (A-A’) que permite instalar el dispositivo manualmente pero que impide desinstalar el dispositivo si no se emplea el útil de desbloqueo. La estanqueidad entre corona (2) y cuerpo (1) se consigue usando una junta apropiada (8).The connection of the device to the valve thread is made by means of the female thread (B') of the crown (2), which turns out to be a part designed and assembled in such a way inside the body that the torque necessary to screwing the crown to the valve is not transmitted directly from the body (1) to the crown (2), but through another intermediate piece that turns out to be the closure cap (3). These two pieces are machined in such a way that they form a pawl (A-A') that allows the device to be installed manually but prevents the device from being uninstalled if the release tool is not used. The tightness between the crown (2) and the body (1) is achieved by using an appropriate gasket (8).

La tapa de cierre (3) remata el montaje del dispositivo. Se rosca en el cuerpo (1), debiendo esta rosca ser sellada para evitar su desmontaje y para proporcionar estanqueidad frente al paso de agua a través de los hilos de rosca. La solidez de la unión permite el giro solidario de cuerpo (1) y tapa de cierre (3) como si fueran una única pieza. Incluye una rosca macho (B) de las mismas características que la de la válvula, de manera que pueda realizarse la conexión a contador. The closing cover (3) completes the assembly of the device. It is threaded into the body (1), and this thread must be sealed to prevent disassembly and to provide sealing against the passage of water through the threads. The solidity of the joint allows the joint rotation of the body (1) and the closing cover (3) as if they were a single piece. It includes a male thread (B) with the same characteristics as that of the valve, so that the connection to the meter can be made.

En la corona (2) se instalan varias piezas que permiten el montaje del útil de desbloqueo para la operación de desinstalación del dispositivo, así como cortar parcialmente el paso de agua a través del dispositivo. Estas piezas son la rosca guía (4), el tapón (5), el limitador de caudal (6) y juntas varias (7 y 9); quedan descritas a continuación.Several pieces are installed on the crown (2) that allow the assembly of the unlocking tool for the uninstallation operation of the device, as well as partially cutting off the passage of water through the device. These parts are the guide thread (4), the plug (5), the flow limiter (6) and various gaskets (7 and 9); are described below.

Por una parte, la rosca guía (4) permite alojar el eje del útil de desbloqueo (11). La operación de roscado del eje (11) arrastra la rosca guía (4), que a su vez empuja la corona (2) forzándola a mantenerse unida a la tapa de cierre (3). En este caso la transmisión de fuerza de torsión se hace por la fricción entre estas dos piezas, permitiendo desmontar el dispositivo. En caso de no roscar el dispositivo de desbloqueo, el trinquete provocaría el giro libre de la corona (2).On the one hand, the guide thread (4) allows housing the axis of the unlocking tool (11). The threading operation of the shaft (11) drags the guide thread (4), which in turn pushes the crown (2), forcing it to remain attached to the closure cap (3). In this case, the transmission of torsion force is done by friction between these two parts, allowing the device to be disassembled. If the unlocking device is not screwed in, the pawl would cause the crown (2) to rotate freely.

El paso de agua través del dispositivo queda reducido con el limitador de caudal (6), que queda fijado con el tapón (5). Ambas piezas quedan instaladas en la corona (2). La estanqueidad entre corona (2) y rosca guía (4) la proporcionan las correspondientes juntas de estanqueidad (9).The passage of water through the device is reduced with the flow limiter (6), which is fixed with the cap (5). Both pieces are installed in the crown (2). The sealing between the crown (2) and the guide thread (4) is provided by the corresponding sealing gaskets (9).

El útil de desbloqueo queda formado por el volante (10) y el eje (11), ensamblados con un pasador que permite el giro solidario de ambas piezas y un pequeño desplazamiento axial del volante para poder liberar el tetón al retirar el útil de desbloqueo.The unlocking tool is formed by the handwheel (10) and the shaft (11), assembled with a pin that allows both pieces to rotate together and a small axial movement of the handwheel to be able to release the lug when removing the unlocking tool.

En la operación de desmontaje del dispositivo se inserta el útil roscándolo a la rosca guía (4) del dispositivo reductor, aplicando fuerza de torsión manualmente en el volante (10). El tetón del volante (10) debe quedar introducido dentro del taladro practicado en la tapa de cierre (3).In the disassembly operation of the device, the tool is inserted by screwing it into the guide thread (4) of the reducing device, manually applying torque to the handwheel (10). The steering wheel lug (10) must be inserted inside the hole made in the closing cover (3).

Una vez instalado el útil se procede a desenroscar el dispositivo de la válvula. El tetón transmite el giro entre el volante (10) y la tapa de cierre (3), que como se encuentra presionada contra la corona (2) permite desenroscar el dispositivo de la válvula.Once the tool has been installed, proceed to unscrew the device from the valve. The lug transmits the rotation between the handwheel (10) and the closure cap (3), which, as it is pressed against the crown (2), allows the valve device to be unscrewed.

Para retirar el útil de desbloqueo debe desplazarse el volante (10) para liberar el tetón antes de desenroscar el útil. To remove the unlocking tool, the handwheel (10) must be moved to release the lug before unscrewing the tool.

Claims

1. Water flow reduction device for the vital minimum in connection valves and meter banks, to insert between the valve and the meter by means of threaded connections of dimensions typical of this type of valve, characterized in that it has anti-fraud functionality due to the fact that it is possible its assembly but its disassembly is impossible unless the corresponding unlocking tool specifically designed for this application is used, the reducing device comprising an external body (1) on which the necessary torque for assembly and disassembly is exerted, inside which there is a detachable ratchet mechanism (A-A'), made up of a crown (2) and a closing cap (3), in charge of preventing disassembly if the aforementioned tool is not used, which is fixed to a guide thread (4) by means of a threaded shaft (11) actuated through a flywheel (10), having a free passage for the partially ob- tained water throughout the length of the device. turated by a flow limiter (6), retained by a plug (5), and with the seal between parts provided by several gaskets (7, 8 and 9), including the seal in the joint between the valve and the flow reducer device.

2. Device for reducing the flow of water for a vital minimum in connection valves and meter batteries according to claim 1, characterized by having a crown (2) with a female thread (B') at one end of the appropriate size depending on the valve in which it is going to be installed, and on the face of the opposite end a toothed profile (A') matching the same toothed profile (A) of the closing cover (3); the crown (2) can move radially and axially freely, while the closure cap (3) is solidly attached to the outer body (1); In the assembly operation, pressure is exerted from the external body (1) towards the valve, which forces the crown (2) to rest against the closing cover (3), so that the pawl (A-A') remains locked in the direction of rotation used in the assembly and the maneuver can be carried out; In the disassembly operation, the pawl (A-A') tends to separate without transmitting rotation, and the disassembly tool must be installed to force the union of the crown (2) and the closing cover (3).

3. Device for reducing the flow of water for the vital minimum in connection valves and meter batteries according to the preceding claims, characterized by having a male thread (B) on the closure cap (3) equal to the male thread of the valves in its connection to the meter.

4. Water flow reduction device for the vital minimum in connection valves and meter batteries according to the previous claims, characterized by having a female thread with a profile and special dimensions in the guide thread (4) to make it difficult to use male threads of standard profiles with which to attempt to fraudulently manipulate the reducing device, said guide thread (4) being able to be removed for cleaning, maintenance or replacement by another part with the same or different thread, this thread being coincident with that of the shaft (11).

5. Device for reducing the flow of water for a vital minimum in connection valves and meter batteries according to the preceding claims, characterized by having a disk-shaped flow limiter (6) installed in the water passage that has one or more perforations of such dimensions that they reduce the flow of water that can circulate inside the flow-reducing device to such an extent that the daily volume of water supplied corresponds to the minimum vital value established by the regulations; Since this vital minimum can vary depending on the legislation to be applied, the design of the perforations will be adapted according to each case.

6. Device for reducing the flow of water for the vital minimum in connection valves and meter batteries according to the preceding claims, characterized by having a removable flow limiter (6) for cleaning, maintenance, replacement or modification due to a change in the minimum value vital required, having a cap (5) for removable fastening of the flow limiter (6).

7. Water flow-reducing device for the vital minimum in connection valves and meter batteries according to the preceding claims, characterized by having a knurled surface on the outer body (1) to improve the grip of the flow-reducing device.

8. Device for reducing the flow of water for the vital minimum in connection valves and meter batteries according to the preceding claims, characterized by having a lug on the steering wheel (10) of the unlocking tool that remains inserted in a hole made for this purpose in the closing cover (3), and whose function is to prevent the steering wheel from sliding with respect to the closing cover to guarantee the correct transmission of the torque necessary for the manipulation of the flow reduction device; it also includes a handwheel that has a hollow of suitable dimensions to house inside the male thread (B) of the closing cover (3) for the correct positioning of the handwheel (10).