Solenoid valve for dispensing a fluid and relative spare parts kit
Solenoid valve ( 1 ) for dispensing a fluid, in particular a fluid for agricultural use, comprising a nozzle body ( 2 ) provided with an inlet section ( 2 a ), an outlet section ( 2 b ) of the fluid and an attachment portion ( 2 c ). The solenoid valve ( 1 ) further comprises a box-shaped body ( 3 ) connected or connectable to the attachment portion ( 2 c ) and comprising a solenoid ( 3 a ) and a movable core ( 3 b ) sliding between a first operating position and a second operating position. The solenoid valve ( 1 ) further comprises a connecting body ( 4 ) comprising a fixing component ( 4 a ) and a gasket ( 4 b ) interposed between the fixing component ( 4 a ) and the nozzle body ( 2 ). The solenoid valve ( 1 ) further comprises a hollow cylindrical body ( 6 ), retained by the gasket ( 4 b ) and configured to enable fluid to pass between the inlet section ( 2 a ) and the outlet section ( 2 b ), when the core ( 3 b ) is in the first operating position, and receive in abutment the core ( 3 b ), when the core ( 3 b ) is in the second operating position, so as to prevent fluid passing between the inlet section ( 2 a ) and the outlet section ( 2 b ).
1 . A solenoid valve ( 1 ) for dispensing a fluid, in particular a fluid for agricultural use, comprising:
a nozzle body ( 2 ) provided with an inlet section ( 2 a ) of said fluid and an outlet section ( 2 b ) of said fluid, said nozzle body ( 2 ) further comprising an attachment portion ( 2 c ) interposed between said inlet section ( 2 a ) and said outlet section ( 2 b ), said attachment portion ( 2 c ) comprising an inlet conduit ( 2 c ′) communicating with said inlet section ( 2 a ) and an outlet conduit ( 2 c ″) coaxial with said inlet conduit ( 2 c ′) and communicating with the outlet section ( 2 b );
a box-shaped body ( 3 ) connected or connectable to the attachment portion ( 2 c ) of the nozzle body ( 2 ) and comprising a solenoid ( 3 a ) and a movable core ( 3 b ) sliding within said solenoid ( 3 a ) between a first operating position and a second operating position, a gasket ( 4 b ) comprises a main conduit ( 4 b ′), coaxial with said outlet conduit ( 2 c ″) of a valve body ( 2 ) of the solenoid valve ( 1 ) and configured to retain a hollow cylindrical body ( 6 ), and at least one secondary conduit ( 4 b ″) in fluid communication with said inlet conduit ( 2 c ′) of the valve body ( 2 ) and a passage seat ( 5 ) of the core ( 3 b ); and
a connecting body ( 4 ) fixed or fixable to said box-shaped body ( 3 ) so as to define said passage seat ( 5 ) for said core ( 3 b ), and said gasket ( 4 b ) fixed or fixable to said attachment portion ( 2 c ) so as to be interposed between the connecting body ( 4 ) and said nozzle body ( 2 );
the hollow cylindrical body ( 6 ), having a first surface resting on said gasket ( 4 b ) for locking the hollow cylindrical body ( 6 ) inside of said gasket ( 4 b ) fixed to the attachment portion ( 2 c ), and so as to be contained at least partially in said passage seat ( 5 ) of the core ( 3 b ), and configured to enable fluid to pass between the inlet section ( 2 a ) and the outlet section ( 2 b ) of the nozzle body ( 2 ), when the core ( 3 b ) is in said first operating position in which the core ( 3 b ) is spaced apart from said hollow cylindrical body ( 6 ), and receive in abutment said core ( 3 b ), when the core ( 3 b ) is in said second operating position, so as to prevent fluid passing between said inlet section ( 2 a ) and said outlet section ( 2 b );
wherein said gasket ( 4 b ) comprises a first circular projection (S 2 ) extending along an outer edge of said gasket ( 4 b ) and configured to engage within a respective circular recess obtained in an outer wall of said attachment portion ( 2 c ) and a second circular projection (S 1 ) extending around said main conduit ( 4 b ′) and configured to be inserted at least partially within and contacting a wall of said inlet conduit ( 2 c ′), said first circular projection (S 2 ) and said second circular projection (S 1 ) delimiting said at least one secondary conduit ( 4 b ″).
2 . The solenoid valve ( 1 ) according to claim 1 , wherein said hollow cylindrical body ( 6 ) comprises a surface ( 6 ′) counter-shaped on an end surface ( 3 b ′) of said core ( 3 b ) such that said end surface ( 3 b ′) adheres to said hollow cylindrical body ( 6 ) when the core ( 3 b ) is in said second operating position.
3 . The solenoid valve ( 1 ) according to claim 2 , wherein said counter-shaped surface ( 6 ′) faces said passage seat ( 5 ) and is shaped so as to have a circular crown configured to rest directly on said gasket ( 4 b ).
4 . The solenoid valve ( 1 ) according to claim 1 , comprising a filtering element ( 9 ) configured to filter impurities contained in said fluid entering said solenoid valve ( 1 ), said filtering element ( 9 ) being retained between said gasket ( 4 b ) and said hollow cylindrical body ( 6 ).
5 . The solenoid valve ( 1 ) according to claim 4 , wherein said filtering element ( 9 ) has a substantially circular shape having a central hole to enable said hollow cylindrical body ( 6 ) to be inserted into said gasket ( 4 b ).
6 . The solenoid valve ( 1 ) according to claim 1 , wherein said box-shaped body ( 3 ) comprises a coil ( 3 c ) configured to supply an electric current to said solenoid ( 3 a ) so as to create a magnetic field to move said core ( 3 b ).
7 . The solenoid valve ( 1 ) according to claim 1 , wherein said solenoid ( 3 a ) comprises a portion ( 3 a ′) projecting partially from said box-shaped body ( 3 ) and configured to engage by shape coupling within a suitable opening of a fixing component ( 4 a ), fixed to or fixable to said box-shaped body ( 3 ) and defining the passage seat ( 5 ) for the core ( 3 b ).
8 . The solenoid valve ( 1 ) according to claim 1 , comprising a seal element ( 7 ) configured to wrap externally said connecting body ( 4 ), said seal element ( 7 ) having an end engaged with said box-shaped body ( 3 ), through the engagement of reversible hooking means ( 8 ), and a second end engaged with said nozzle body ( 2 ).
9 . The solenoid valve ( 1 ) according to claim 8 , wherein said reversible hooking means ( 8 ) enables locking and unlocking the box-shaped body ( 3 ) on the seal element ( 7 ) to enable the coil ( 3 c ) to be replaced.
10 . The solenoid valve ( 1 ) according to claim 1 , wherein said solenoid ( 3 a ) traverses the box-shaped body ( 3 ) until it exits with a head portion ( 31 a ) from the box-shaped body ( 3 ); said head portion ( 31 a ) being engageable with reversible hooking means ( 8 ) to promote a removable connection of the box-shaped body ( 3 ) to the solenoid ( 3 a ).
11 . The solenoid valve ( 1 ) according to claim 1 , wherein the first surface is a crown surface that rests directly on the gasket ( 4 b ).
12 . The solenoid valve ( 1 ) according to claim 11 , wherein the crown surface is partially inserted in the passage seat ( 5 ).
13 . The solenoid valve ( 1 ) according to claim 1 , wherein the hollow cylindrical body ( 6 ) has a second surface at least partially inserted in the outlet conduit ( 2 c ″).
14 . The solenoid valve ( 1 ) according to claim 13 , wherein the second surface of the hollow cylindrical body ( 6 ) is positioned opposite to the first surface of the hollow cylindrical body ( 6 ).
15 . The solenoid valve ( 1 ) according to claim 1 , wherein the hollow cylindrical body ( 6 ) is pressed firmly in the main conduit ( 4 b ′) of the gasket ( 4 b ).
16 . The solenoid valve ( 1 ) according to claim 1 , wherein the hollow cylindrical body ( 6 ) is fitted in and directly contacts the main conduit ( 4 b ′) of the gasket ( 4 b ).
17 . A spare parts kit for a solenoid valve ( 1 ) according to claim 1 comprising one or more of the following elements:
a replacement solenoid ( 30 a ) replacing a corresponding worn solenoid ( 3 a );
a replacement movable core ( 30 b ) replacing a corresponding worn movable core ( 3 b );
a replacement gasket ( 40 b ) replacing a corresponding worn gasket ( 4 b );
a replacement hollow cylindrical body ( 60 ) replacing a corresponding worn hollow cylindrical body ( 6 );
a replacement filtering element ( 90 ) of a corresponding worn filtering element ( 9 ).