Automatic shut-off valve

An automatic closing valve in case of a leak, the valve comprising:

• a case defining a conduit with an inlet and an outlet, where the case is configured to be coupled between the pipeline of a supply line and allows a flow of a fluid originated from the pipeline, from the inlet to the outlet;
• a shutter placed in the conduit of the case,
• a mechanism of a rod-crank-slider including:
• a slider connected to the shutter;
• a rod connected to the rod-crank-slider;
• a crank connected to the rod;
• an actuator connected to the mechanism of the rod-crank-slider, the actuator including:
• a stem connected to the crank of the mechanism rod-crank-slider;
• a retention support linked to the case;
• an automatic rotation crank joined to the stem;
• a crank support joined to the automatic rotation crank and mounted over the retention support;
• a flat coil torsion spring located inside the automatic rotation crank and crank support, the flat coil torsion spring is joined at one internal end to the retention support and by an external retention end to the automatic rotation crank;
• and
• a trigger mechanism joined to the support of the crank;
• an impeller connected mechanically to the trigger of the actuator, the impeller locks or unlock the trigger mechanism;
• a working flow meter connected to the conduit of the case, the flowmeter is adapted to indicate continuously the flow rate of the liquid or gas fluid passes through the conduit;
• a programmable memory customized to storage the information of at least one measure of a permissible fluid per time unit;
• a controllable clock;
• and
• a controller connected to the impeller, to the flowmeter, to the programmable memory and to the controllable clock, where the controller is customized to restart the clock and activate the actuator to unlock the trigger mechanism, releasing the potential energy of the flat coil torsion spring and transferring it to the stem to impulse the mechanism of the rod-crank-slider to switch the shutter from the first position to allow;
• the flow of the fluid through the conduit of the case to a second position blocking the flow in the conduit of the case, when the controller infers a leak of the fluid in the pipeline when the continuous measures of the flow of the fluid are greater than the permissible quantity of fluid.