| 摘要 |
This invention relates to a mixing apparatus assembly with air gap separation, comprising a first duct (22), having an inlet mouth (235) and a diameter D, connected to an air gap valve (223) downstream of which a venturi mixing device (4) is connected, the air gap valve (223) comprising a nozzle (224) having an outlet (225) spaced apart by a separation distance (226) from a collecting duct (227), the first duct (22) and the air gap valve (223) forming a linear channel upstream of the outlet (225) of the nozzle (224), going from the inlet mouth (235) of the first duct (22) to the outlet (225) of the nozzle (224) and having a length L, the assembly being characterized in that the length L being not shorter than D and not longer than 20D, i.e. D≦L≦20D, and in that said linear channel is provided with a flow straightener (228). This invention further relates to an apparatus for mixing a liquid comprising such assembly. |
| 主权项 |
1. An apparatus for mixing a liquid drawn from a supply with one or more concentrated chemical products, comprising a mixing apparatus assembly with air gap separation comprising a first duct, having an inlet mouth and a diameter D, connected to an air gap valve downstream of which a venturi mixing device is connected, the air gap valve comprising a nozzle having an outlet spaced apart by a separation distance from a collecting duct, the first duct and the air gap valve forming a linear channel upstream of the outlet of the nozzle, going from the inlet mouth of the first duct to the outlet of the nozzle and having a length L, wherein the length L is not shorter than 3D and not longer than 20D, i.e.
3D ≦L ≦20D,and said linear channel is provided with a flow straightener having a shape with cylindrical symmetry, and including a proximal end pointing in a direction opposite to a fluid flow direction and shaped as an ogive and a plurality of angularly equally spaced coaxial longitudinal tongues, or is formed by a plurality of parallel longitudinal tubes, wherein the apparatus further includes a magnetically actuated valve comprising:
mechanical means for opening and closing the magnetically actuated valve, so as to be capable of occluding and clearing, respectively, a mouth of a duct mounted downstream of the magnetically actuated valve, at least one ferromagnetic metal pin movable between a pin rest position and a pin operating position, at least one activation magnet movable between a magnet first position and a magnet second position,said mechanical means being capable of interacting with said at least one ferromagnetic metal pin so that when said at least one ferromagnetic metal pin is in the pin rest position, said mechanical means closes the magnetically actuated valve, and when said at least one ferromagnetic metal pin is in said pin operating position, said mechanical means opens the magnetically actuated valve, said at least one activation magnet being capable of interacting magnetically with said at least one ferromagnetic metal pin so that when said at least one activation magnet is in said first magnet position, said at least one ferromagnetic metal pin is in said pin rest position, and when said at least one activation magnet is in said second magnet position, said at least one ferromagnetic metal pin is in said pin operating position,
the magnetically actuated valve comprising sliding means including a slide integrally coupled to said at least one activation magnet and movable between a slide initial position and a slide final position, whereby said at least one activation magnet is slidable between said first magnet and second magnet positions so that when said slide is in said slide initial and slide final positions, said at least one activation magnet is, respectively, in said first magnet and second magnet positions, said at least one activation magnet being shaped so as to comprise a slot capable of sliding around said at least one ferromagnetic metal pin so that when said slide is in said slide initial position, said at least one ferromagnetic metal pin is in said pin rest position wherein said at least one activation magnet does not interact with the same, and when said slide is in the slide final position, said at least one ferromagnetic metal pin is moved in said pin operating position by an interaction with said at least one activation magnet, wherein, when said slide is in said slide initial position, said at least one ferromagnetic metal pin is in correspondence with a peripheral end of the slot or at the outside of the slot, and when said slide is in said slide final position, said at least one ferromagnetic metal pin is in correspondence with the inside of the slot, at a slot end within said at least one activation magnet, wherein said at least one activation magnet is shaped as a disc provided with said slot, wherein said at least one ferromagnetic metal pin is movable between said pin rest position and said pin operating position along its own longitudinal axis, said at least one activation magnet being slidable between said magnet first and magnet second positions on a plane orthogonal to said longitudinal axis of said at least one ferromagnetic metal pin, wherein said sliding means further comprises two side pins, integrally coupled to the slide, capable of sliding within two respective liners opposed by respective springs, a fork structure having two side legs integrally coupled to the two side pins, respectively, the fork structure being integrally coupled to said at least one activation magnet, wherein said means for opening and closing the magnetically actuated valve comprises a perforated membrane attached to an insert provided with at least one hole capable of communicating with said mouth of the duct mounted downstream of the magnetically actuated valve, said at least one ferromagnetic metal pin interacting with at least one corresponding inner opposing spring tending to make said at least one ferromagnetic metal pin assume said pin rest position, and said at least one ferromagnetic metal pin being capable of interacting with said at least one hole of the insert so that in said pin rest position, said at least one ferromagnetic metal pin occludes said at least one hole of the insert, and in said pin operating position, said at least one ferromagnetic metal pin clears said at least one hole of the insert, said at least one ferromagnetic metal pin and said at least one corresponding inner opposing spring being housed in at least one respective housing around which the slot is capable of sliding. |
