3results about How to "Extended escape time" patented technology

The utility model relates to the technical field of coal mine tunneling, and proposes a safety supporting device for coal mine tunneling operation, which comprises two bases, the two bases are oppositely arranged, a lifting pipe is welded to the top end face of the base, a lifting column is inserted into the top of the lifting pipe, a damping pipe is screwed to the top end face of the lifting column, a first damping rod is screwed to the inner bottom of the damping pipe, and a top rod is inserted into the top of the damping pipe; the safety supporting device for coal mine tunneling operation forms first round protection through the steel cable, the second damping rod and the supporting pad, if the steel cable is broken or comes out of the sleeve due to excessive pressure, second round protection is formed by the first connecting rod and the second connecting rod, and buffering is performed by the first damping rod; multiple protections are conducive to improving the safety supporting effect of the equipment, and the range supported by the equipment is large, which can increase the escape time when the mine collapses and improve the use effect of the equipment.

This invention relates to the field of vehicle technology and discloses a buoyancy switch device for an air duct, an air conditioning intake assembly, and a vehicle. The device includes an air duct assembly, a baffle, and a buoyancy drive device. The air duct assembly has an internal air duct, and the baffle is movably disposed within the air duct. The buoyancy drive device includes a transmission assembly and a first buoyancy drive component, which is convexly connected to the baffle via the transmission assembly. The first buoyancy drive component has an initial position and a floating limit position, and the baffle correspondingly has a non-blocking position and a blocked position. When the first buoyancy drive component is in the initial position, the transmission assembly drives the baffle to maintain the non-blocking position to keep the air duct open. When the first buoyancy drive component moves to the floating limit position due to buoyancy, the transmission assembly drives the baffle to switch to the blocked position to block the air duct. This invention solves the problem of not being able to block the air duct opening after a vehicle falls into water.

The utility model discloses a kind of smoke-proof fire doors, it is related to fire door technical field;And the utility model includes door frame and door panel, the door frame one end is hinged with door panel, the door frame inner wall one end is fixedly connected with baffle, one side of the door panel is equipped with recess, water bag is arranged in the recess, the recess and water bag are all along door panel edge and are set around, the water bag outer wall one end is provided with first gasket, the baffle one end side wall is provided with second gasket, the first gasket and second gasket are movably connected, the door panel inside is equipped with water flow channel, the door panel one end is provided with water jet, the water jet is communicated with water flow channel, the water jet one end is provided with multiple atomizing nozzles;The utility model is by filling water in water bag and making it expand, to let first gasket and second gasket adhere more closely, to improve smoke-proof effect in this way.