FIELD: fire and explosion safety systems.
SUBSTANCE: invention relates to a system for ensuring explosion and fire safety during repair work on main pipelines. Temporary sealing device displacement control system comprises a rod equipped with a rubber adapter with a ring tip for connection to the temporary sealing device inlet union, wherein rod is installed in guide tube with possibility of movement, and a support plate is rigidly fixed on the guide tube, on which a limit switch with an actuator is installed, freely located on a slider fixed on a rod and connected to the support plate by means of a spring, wherein the limit switch is electrically connected to the signalling device, which is connected to a gas content sensor installed by means of a magnetic clamp. In case of displacement of temporary sealing device rod inside guide tube is shifted relative to support plate connected to slider by spring, and the actuator of the limit switch, moving linearly, comes off the slider, leading to the actuation of the limit switch, the signal from which is transmitted via an electric cable to the signalling device.
EFFECT: enlarging the array of technical means ensuring increase of explosion and fire safety during repair works on main pipelines.
9 cl, 4 dwg
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