Pressure-sealed plug coupling
OwnerErwin Weh, Wolfgang Wehinventors
Life of this patent
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Abstract
For a simple operation and high safety in a coupling for fluids under pressure, an arrangement of an inlet valve, a ventilation valve and an outlet valve in the coupling housing is proposed, the inlet valve, and ventilation valve being brought alternately into the open position by an operating device, e.g., an eccentric shaft. Due to this alternate blocking of the valves, at least one valve is always closed even on faulty handling, so that fluid under pressure cannot escape. This coupling is thus suitable especially for high pressure filling at filling stations, since high safety and simple operation are achieved. A simplified coupling is described, which can be operated by hand, enabling fast coupling and disconnection, so that fluid cannot flow out.
Claims15
A coupling for fluid lines for pressure-sealed connection to a counter-connection, especially of a high-pressure tank for gas, with an axially displaceable control piston in a coupling housing, an operating device for displacing the control piston, at least one clamping element for connection to the counter-connection, said clamping element having an exterior surface, a sleeve which is axially displaceable relative to said housing and is coupled to the operating device so that the operating device controls axial displacement of said sleeve, said sleeve having an interior surface which engages, in a blocking position of said clamping element, the exterior surface of said clamping element and is situated, in a release position of said clamping element, at a distance from said clamping element, wherein:
- said counter-connection has a longitudinal axis, an end surface extending transverse to said longitudinal axis and an interior wall extending along the longitudinal axis and defining a gas passage, said interior wall is configured to include, along the longitudinal axis from the end surface, a first inwardly tapered surface, a cylindrical centering collar, an annular groove and a substantially radially extending bearing surface, and said counter-connection further includes a sealing ring disposed in said groove,
- said coupling further comprises an outlet valve member disposed in said housing for axial movement in said housing, said outlet valve member has a longitudinal axis, a coupling end extending transverse to said longitudinal axis and an interior wall extending along the longitudinal axis and defining a gas passage, and an exterior wall extending along the longitudinal axis and having a surface portion which tapers outwardly from said coupling end, and
- said counter-connection is connectible to said outlet valve member by relative movement to bring said counter-connection and said outlet valve member into a relative position in which said cylindrical centering collar engages said exterior wall of said outlet valve member, said substantially radially extending bearing surface of said counter-connection bears against said coupling end of said outlet valve member and said sealing ring engages said outwardly tapering surface portion of said exterior wall of said outlet valve member and forms a seal between said valve member, whereby movement of said counter-connection along its said longitudinal axis toward said outlet valve member is transmitted to said outlet valve member via said substantially radially extending bearing surface of said counter-connection and said coupling end of said outlet valve member.
A coupling for fluid lines for a pressure-sealed connection to a counter-connection, especially of a high-pressure tank for gas, comprising:
- a coupling housing having a central longitudinal axis;
- a piston displacably arranged in said coupling housing;
- clamping means provided at a front end of said housing for securely connecting said coupling to said counter-connection, said clamping means being controllable by an axial displacement of a sleeve provided on said housing;
- an inlet valve means, a ventilation valve means, and an outlet valve means arranged in said coupling housing;
- and
- an operating means for axially displacing said sleeve directly and said ventilation valve means and said inlet valve means by means of said control piston in a predetermined sequence;
- said operating means being movable between a first position and a second position and being coupled to said sleeve and said piston so that;
- in said first position of said operating means, said sleeve is in a clamping position to cause said clamping means to securely connect said coupling to said counter-connection and said piston is in a position to open said inlet valve means and close said ventilation valve means;
- and in said second position of said operating means, said sleeve is in an unclamping position for allowing said clamping means to move in order to permit disconnection of said counter-connection from said coupling, and said piston is in a position to close said inlet valve means and open said ventilation valve means.
The coupling of claim 15, wherein said clamping means are cylindrically arranged clamping jaws radially adjustable with their front ends from a release into a blocking position, and engaging positively in said blocking direction on the counter-connection;
- said axially displaceable sleeve being biased, the interior surface thereof engaging in blocking position the exterior surfaces of said clamping jaws and being positioned in release position at a distance from said clamping jaws, wherein the clamping jaws are provided with locking hooks which are biased in release position by a spring and lock said sleeve positively in remote position.
Dependencies are inferred from the claim text.