27 results about "Emergency situations" patented technology

The invention discloses an emergency parachuting device and method for a multiple-rotor unmanned aerial vehicle. The device comprises a measurement and control unit, an unlocking steering engine, a parachute-throwing spring, a latch, a parachute and a magnetic latching relay, wherein the measurement and control unit, the unlocking steering engine, the parachute-throwing spring, the latch, the parachute and the magnetic latching relay are installed in a parachute bin. The measurement and control unit comprises a microcontroller and an inertia movement measurement unit, wherein the microcontroller is electrically connected with the unlocking steering engine and the magnetic latching relay; the unlocking steering engine is connected with the latch through a rocker arm, and the magnetic latching relay is used for connecting or disconnecting a power supply of a rotor motor; the parachute bin is fixed to the multiple-rotor unmanned aerial vehicle, one end of the parachute-throwing spring is fixed to the bottom of the parachute bin, and the parachute is arranged at the other end of the parachute-throwing spring. The method includes the following steps that the current instant height and acceleration of the unmanned aerial vehicle are acquired, the dropping rate of the unmanned aerial vehicle is worked out, whether the unmanned aerial vehicle flies under a dangerous dropping state or not is judged, and if yes, the power supply of the rotor motor is disconnected, and the parachute is thrown out to make the unmanned aerial vehicle safely land. The emergency parachuting device has the advantages of being simple in structure, low in cost, light in weight, high in reaction speed and the like.

The invention discloses a nuclear reactor coolant pump and a passive stopping seal assembly thereof. The passive stopping seal assembly comprises a seal ring, a tightening-up ring and a meltable support block. The seal ring is an opening ring. In a normal working condition, a pump shaft is surrounded by the seal ring and a space is kept between the seal ring and the pump shaft. The outer circumferential wall of the seal ring is encircled by the tightening-up ring. In a working condition that power failure happens to a whole plant, the tightening-up ring provides the seal ring with sufficiently big holding-tightly force to drive the seal ring to close to hold the pump shaft tightly. The meltable support block is inlayed in an opening of the seal ring or of the tightening-up ring. In the normal working condition, the meltable support block prevents the ring where the meltable support block is located from being closed and it is ensured that the seal ring is in an opening state. In addition, in the working condition that power failure happens to the whole plant, the meltable support block melts and loses efficacy, so that the seal ring is closed under the action of the tightening-up ring. Compared with the prior art, the passive stopping seal assembly is only provided with the three elements; not only can the integrity requirement of a shaft seal be met under the condition that an emergency shaft seal injection system is not relied on in the working condition that power failure happens to the whole plant, but also the passive stopping seal assembly has the advantages of being simple in structure and firm in seal.

A fire extinguisher having at least one indicating device located thereon that provides a visual and / or audio signal to allow a user to quickly locate the fire extinguisher in an emergency.

The present invention provides a terminal running method and apparatus. The method comprises: setting an emergency mode for a terminal in advance; and when a system power level of the terminal is 0, enabling the terminal to run in the emergency mode. The terminal running method and apparatus provided by the present invention solve the problem in the prior art that when a power level displayed by a terminal system is 0, remaining available electricity of a battery of the terminal cannot be effectively used. According to the method and apparatus provided by the present invention, the terminal is enabled to run in the emergency mode when the system power level of the terminal is 0, and in the emergency mode, the terminal is only allowed to enable a preset function and execute a preset operation. In this way, the power consumption of the terminal is effectively reduced, so that the remaining available electricity of the battery of the terminal enables the terminal to run.

The invention discloses a nuclear power plant emergency power source power supply test method and system, the method is as follows: making a circuit system in the pressure relief state; opening a voltage stabilizer evacuation valve; providing main pump shaft seal water; dismantling a cut-off valve element from a material replacing water tank to a high-pressure safety injection pump inlet; presetting low pressure safety injection pump outlet valve opening degree; in the reactor pressure vessel covered condition, triggering a safety injection signal; starting a low pressure safety injection pump to pressurize a high-pressure safety injection pump to take water from the material replacing water tank to injecting water into a circuit; and due to the dismantling of the cut-off valve element from the material replacing water tank to a high-pressure safety injection pump inlet, flowing water from the low pressure safety injection pump outlet back to a low pressure safety injection pump inlet to form large flow circulation to star an emergency power source power supply test under full load conditions. The beneficial effects are that: the method can be performed without the reactor pressure vessel cover opening condition, and is not limited by test execution windows, other debugging work may not be restricted during the test period, and the debugging working period can be saved.

The invention discloses a guide rope fixing device capable of being automatically released, which comprises a guide rope fixing frame, a main shaft sleeve is connected in the guide rope fixing frame, the main shaft sleeve is hollow, the two ends of the main shaft sleeve are communicated with the outside, the main shaft sleeve comprises a first shaft sleeve part and a second shaft sleeve part, and a rotating block is fixedly arranged on the outer ring surface of the second shaft sleeve part; the guide rope fixing frame is connected with lug plates, the lug plates comprise the first lug plate and the second lug plate, the first lug plate and the second lug plate are fixedly arranged on the two opposite side walls of the guide rope fixing frame respectively, and the second lug plate is rotationally connected with one end of a rotating block; and the other end of the rotating block is connected with a hydraulic releasing assembly used for driving the guide rope to be released. The plug pin is driven to move through the oil cylinder, fixing and opening operation of the rotating block is achieved, and the effects that the guide rope is released under the emergency condition, and life safety of divers is guaranteed are achieved.

The invention relates to a control system which is used to control motion of an electric device. The system comprises first and second control boxes; the first control box is provided with a single button; when input electric energy exists and the button is pressed, the first control box drives the second control box to be in a pairing mode and execute pairing program; and when input electric energy losses efficacy and the button is pressed, the first control box drives the second control box to be in an emergency operation mode.

The invention discloses a fall prevention device of an emergency power supply plug-in-plug-out module. The fall prevention device comprises a plug-in-plug-out module, a support plate, a pull ring, a plum screw, a fixed magnet, an inverted pin, a limiting groove, a belt, a pulley and a guide rail, wherein the plug-in-plug-out module is arranged on the support plate, the guide rail is arranged at the bottom of the plug-in-plug-out module, a pressing rivet nut hole is formed in the bottom of the support plate, the plum screw passes through the pressing rivet nut hole to be matched with the guide rail, the limiting groove is fixedly formed in a bottom surface of the interior of the plug-in-plug-out module, the fixed magnet is fixed at one end of the limiting groove, the inverted pin can move in the limiting groove, one end of the belt is connected to an end surface of the inverted pin, and the other end of the belt is connected with the pull ring. By the plug-in-plug-out module, the plum screw is blocked by a mutual effect between the fixed magnet and the inverted pin during the plug-out process so as to prevent the plug-in-plug-out module from falling off. The device has the characteristics of simplicity in structure and low cost, and moreover, the plug-in-plug-out module is prevented from falling off to cause damage and personal casualty.

The invention discloses a milestone. The milestone comprises a highway number and highway mileage, wherein the highway number and the highway mileage can be directly attached to the road surface of a highway. The milestone is arranged on a road shoulder on the right side of a driveway of the highway or on the road surface of the central position of an emergency parking strip. The highway number and the highway mileage are formed by spraying coatings arranged on the road surface of the highway, by direct bonding of fiber reinforced plastic (FRP) fonts on the road surface or by bonding of an FRP plate containing the highway number and the highway mileage on the road surface of the highway. Compared with milestones of a certain height in the prior art, the milestone has the advantages that the height is low, the driving safety is not affected, automobile tires are not damaged easily, and the milestone is easy to maintain, high in safety, small in material consumption due to the low height, low in cost and not easy to damage. The invention also provides the highway with the milestone and two construction methods of the milestone.