| 摘要 |
<p>Thermal safety device for automatically blocking pipes. A thermal safety device should be developed which, in the area of the closing element, has an uninterrupted circular cross section. Furthermore, the axial guiding of the closing element during the closing stroke should be ensured. In the axial continuation of a seat located within the casing there is a gui de pin. A closing spring is aligned on this guide pin, and, when taut, the spri ng is situated as far as possible inside a blind hole, with a throat acting as a control edge, inside the closing element. Under the influence of the closing spring the ram, as part of a detecting element, when the safety device is in the open position, keeps the control edge adjacent to a click-stop edge. Once the thermal solder melts away, however, the resulting change in position of the ram means that the control edge is no longer adjacent to the click-stop edge, so that the closing element, under the influence of the closing spring, takes up the closed position. The thermal safety device acts to shut off pipes, especially gas pipes, automatically should an inadmissible rise in temperature occur.</p> |
