DK148367B - Valve for protection against over-filling of portable containers, in particular gas cylinders - Google Patents

Description

148367

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a valve for preventing overfilling of portable containers, in particular gas cylinders, with a filling channel passing through the container wall, which is controlled by a valve body cooperating with a valve seat 5, which is kept free of this in the provided filling position by a valve lifter / s. is controlled by a pendulum similar to a hinged joint, screwed by fluctuations in that, by a certain deviation from said container position 10, permits closure of the valve, and which is associated with a float which, upon obtaining the required filling level in the container, also causes a valve-closing fluctuation of the hinge joint relative to the container.

15 Such a valve arrangement is disclosed in the description of Danish Patent Application No. 4592/82. In this case, the valve lifter is constituted by a projection on a substantially spherical body resting in a spherical bearing and by a weight of weight being sought to be held in a fixed orientation in space. This means that by tilting the container away from the required filling position, the spherical body is rotated with respect to the container and thus a lateral displacement of the projection away from the valve body, so that it enters the closing position and prevents further filling until the container. again the assumed, usually vertical filling position.

It is further stated in said patent application that the load weight may be connected to a float which, down to a certain filling level, hangs downward from the load weight and acts as a supplement thereto, but which in the subsequent filling is swung upwards in relation to the load weight. and, as the level approaches the upper limit, 35 predominates over the load weight and thereby, as a result of the buoyancy, causes a rotation of the ball body and thus a stoppage of the filling.

It is an object of the invention to provide a valve which is structurally simpler and thus cheaper to manufacture, and which has the same mode of operation for interrupting an ongoing filling, partly when the container does not occupy the assumed, usually mainly vertical position, and partly when the maximum permissible amount of liquid gas 10 has been filled.

According to the invention, the valve is characterized in that said hinge joint is suspended on a substantially horizontal pin in said position, and that the float is restricted to pivoting relative to the hinge joint 15 on a substantially horizontal horizontal pin whose axial direction crosses the first pin. axis direction at an angle substantially different from 0 ° and 90 ° and preferably about 45 °.

A significant simplification compared to the previous embodiment mentioned above is that its spherical bearing is replaced by a simple pin bearing which is cheaper both in manufacture and in assembly, but a condition for achieving the desired function is that the axis direction of this pin bearing 25 crosses the axis direction of the pin between the hinge joint and the float in the manner indicated. Namely, an angle at or near 0 ° between the two axis directions would allow the container to be tilted or poured into the joint plane of the two axes without triggering the closing function, and at an angle of or near 90 ° the buoyancy on the float would strain the hinge joint. with a torque in the plane containing the axis of this joint's suspension pin, and consequently would not safely effect the closing of the valve at the maximum filling level achieved.

The said valve lifter may be a separate, displaceable or rotatable member inserted between the valve body and the hinge joint, but for further simplification of the structure it is preferred that the valve lifter be constituted by the upper end of the pendulum-like hinge joint.

In this embodiment, the invention is illustrated in the drawings.

On this, 1 indicates a portion of the top of a gas bottle or, optionally, a portion of a separate head piece, which is mounted in the known manner in the container top.

The part in question contains a filling and tapping passage 2 which forms at the top a tapered valve seat 3 for a valve body 4 which, as indicated, is loaded against the seat. This load is exerted by the medium to be filled and can be supplemented by a closing spring not shown. The valve body 4 has a downwardly directed spindle 5 which is slidable in a guide 6 and with its lower rounded end enters the likewise rounded upper end portion 7 of a pendulum-like hinge 8, which is suspended on a pin 9 in the container 20 or its head piece. . In the correct filling and draining position, the container is vertical as provided in the drawing, and the end portion 7 of the hinge joint acts as a valve lifter holding the passage 2 open.

By some oscillation of the hinge joint relative to the container, e.g. as a result of a tilting of the container in the plane of the drawing, the top of the end portion 7 is laterally displaced relative to the spindle 5 of the valve body, and depending on the size of the oscillation and the selected dimensions, including the curvature of the end surface of the portion 7, a container tilt of, for example, 15-20 ° cause complete closure of the passage 2.

At the lower end of the hinge joint 8, a float 11 is suspended on a tab 10 which, until a certain level of filling in the container, helps to keep the hinge joint in a vertical position. As indicated, the axial directions of the two pins 9 and 10 intersect at an angle of about 45 ° and this causes a tilt of the container in the vertical plane containing the axis of the pin 9 (i.e. in such a direction that the hinge joint 8 not immediately loaded with a torque about this axis) causes the float 11 to oscillate relative to the hinge 8, so that in this way it is momentarily loaded about the pin 9 and consequently seeks to remain in the vertical position.

As the filling level in the container approaches a prescribed maximum height, the buoyancy of the float 11 will cause a rotation thereof about the pin 10. This rotation takes place freely and without influence on the hinge joint 8 within an angle of, for example, 10-20 °, but then a further rotation between the parts 8 and 11 may be prevented, for example by contacting a pair of abutment surfaces 12 and 13 on each of the parts. As the level of the container continues to rise, the buoyancy of the float 11 will then load the hinge joint 8 so that this pivots on the pin 9 and permits the closing of the valve 4.