Solenoid valve
First Claim
1. A solenoid valve including a valve body, a fluid inlet conduit, a fluid outlet conduit, a seat between said conduits, a magnetic field coil, and a fluid flow damper selectively displaceable in an axial direction in a bore in the body under the effect of a magnetic field produced by an energization of the electrical coil and cooperating with the seat in the body between the fluid inlet conduit and the fluid outlet conduit provided in the body to form a fluid sealing surface, characterized by a valve housing containing the valve body, the fluid inlet conduit, the fluid outlet conduit, the seat between the conduits and the magnetic field coil and having an internal cylindrical chamber in which the valve body is housed in a displaceable manner along said axial direction;
- a fluid inlet pipe and a fluid outlet pipe for said cylindrical chamber; and
at least one elastic joint tightly uniting the wall of the cylindrical chamber and said valve body so as to separate said inlet conduit and inlet pipe from said outlet conduit and outlet pipe.
1 Assignment
0 Petitions
Accused Products
Abstract
A solenoid valve includes a valve body (3), a ferromagnetic fluid flow damper (4) cooperating with a seat (6), to form a fluid sealing surface, an electromagnetic field coil (11) for selectively displacing the damper (4) against the action of a spring (7) by a magnetic field produced by an energization of the coil, an intake conduit (19) and an outlet conduit (20). The valve body (3) is housed in a cylindrical chamber (2) of a hydraulic unit (1) with an internal fluid intake pipe (14) and an internal fluid outlet pipe (22), communicating with their respective fluid intake (19) and outlet (20) conduits in the valve body (3). A flexible joint (16) connects the wall of the cylindrical chamber (2) with the rim of the intake conduit (19) and a compression spring (23) is located between the lower side (24) of the body (3) and the hydraulic unit (1) to provide an elastic suspension for the body (3). This arrangement enables gradual interruption of the flowing liquid when the valve closes by the damper (4) being impelled into the seat (6) by the spring (7) to eliminate water hammer. It is thus possible to regulate pressure in an fluid bypass application installation following a linear function of the ratio of the valve opening time to the total current cycle supplying the coil (11).
22 Citations
12 Claims
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1. A solenoid valve including a valve body, a fluid inlet conduit, a fluid outlet conduit, a seat between said conduits, a magnetic field coil, and a fluid flow damper selectively displaceable in an axial direction in a bore in the body under the effect of a magnetic field produced by an energization of the electrical coil and cooperating with the seat in the body between the fluid inlet conduit and the fluid outlet conduit provided in the body to form a fluid sealing surface, characterized by a valve housing containing the valve body, the fluid inlet conduit, the fluid outlet conduit, the seat between the conduits and the magnetic field coil and having an internal cylindrical chamber in which the valve body is housed in a displaceable manner along said axial direction;
- a fluid inlet pipe and a fluid outlet pipe for said cylindrical chamber; and
at least one elastic joint tightly uniting the wall of the cylindrical chamber and said valve body so as to separate said inlet conduit and inlet pipe from said outlet conduit and outlet pipe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- a fluid inlet pipe and a fluid outlet pipe for said cylindrical chamber; and
Specification