8results about How to "Guaranteed safe state" patented technology

The invention provides a protection method, device, equipment and medium for a nuclear power plant reactor, and the method comprises the following steps: obtaining water level data in a reactor pressure vessel in real time, and sending a low water level signal when the water level data is lower than a preset low water level; a protection signal is sent out according to the low water level signal; based on the protection signal, a safety injection system supplements coolant into the reactor pressure vessel and initiates a blowdown isolation function of the chemical and volume control system. By means of the protection method, device and equipment for the nuclear power plant reactor and the medium, water can be supplemented to the reactor core under the condition that a reactor protection system fails.

The invention belongs to the technical field of stator windings, and discloses a 100MW turbonator stator winding inserting method, which comprises the following steps: S1, a pre-preparation stage; s2, a disassembly preparation stage; s3, a stator winding dismounting stage; s4, performing subsequent inspection and maintenance; the pre-preparation stage comprises shutdown and electrical isolation, environment preparation and tool and equipment preparation. Good external conditions and reliable equipment support are provided for dismounting work, the stability and suitability of the dismounting environment are ensured through temperature and humidity control, and the influence of environment change on the winding performance is reduced; a working area is thoroughly cleaned, so that potential pollution sources are eliminated, the smooth operation of the dismounting work, the use of a special dismounting tool and the inspection of the sharpness of a cutter are guaranteed, the surface of the winding is prevented from being scratched, and the completeness of the winding is protected; and the use of the insulation detector ensures that the insulation performance of the winding is good before the winding is disassembled, and provides a powerful guarantee for subsequent reinstallation.

The utility model discloses a safety interlocking system of a polymerization kettle for producing polytetrafluoroethylene by a suspension method, and relates to the technical field of polytetrafluoroethylene production. According to the utility model, through the dispersion instrument control system, when overtemperature and overpressure occur in the polymerization kettle, the first tetrafluoroethylene feed valve, the first steam feed valve and the first condensate water outlet valve are controlled to stop feeding and steam introduction, and the motor is closed to stop stirring; the first chilled water inlet valve, the first chilled water outlet valve and the first emergency emptying valve are opened at the same time, chilled water is introduced into the jacket to further reduce the temperature and pressure of the polymerization kettle, and meanwhile, a part of pressure is released through the emergency emptying pipeline, so that the production is ensured to be in a safe state.

The present invention provides a method and system for detecting the movement state of a garage door, which are applied to the field of sensor data processing. Through information communication between a data sensor preset in the garage door and a mobile device, the present invention allows a user to check the opening and closing state of the garage door in real time anytime and anywhere. This real-time monitoring function enables the user to ensure that the garage door is in a safe state when the user is out, so that the user no longer needs to rely on visual inspection or traditional switches, thereby reducing the safety hazards caused by forgetting to close the door or opening the door by mistake and improving the protection of property.

The present invention belongs to the field of image technology, and specifically relates to an automatic docking system for a fluid loading and unloading arm of a petrochemical ship based on image technology, comprising a hull, the hull being used for connecting various components; a loading and unloading arm component, the loading and unloading arm component being arranged on the hull, the loading and unloading arm component being used for loading and unloading and docking of a penetrating fluid; a moving component, the moving component being arranged on the hull, the moving component being connected to the loading and unloading arm component, the moving component being used for moving the loading and unloading arm component and calibrating the docking with a ship; a control system, the control system being connected to the loading and unloading arm component and the moving component, the control system being used for automatic control of the loading and unloading docking of the ship, and for realizing accurate automatic docking of the fluid loading and unloading arm of the petrochemical ship, and having the effect of automatic control of the docking of the fluid loading and unloading arm of the ship.

The present application belongs to the technical field of steel wire rope, and discloses a steel wire rope inspection and maintenance device of a portal crane. A fixed end is arranged on a hanging beam of the portal crane, one end of the steel wire rope is arranged at the fixed end, and the other end is connected to a winch through a movable pulley. The inspection and maintenance device comprises a body assembly, an oil scraping assembly and a camera. The body assembly comprises a first bell mouth structure, a first connecting pipe and a second bell mouth structure connected in sequence. The steel wire rope can be arranged in the body assembly. The body assembly can be fixed to the shell of the movable pulley. The winch is rotated to move the body assembly. The first bell mouth structure is used for accommodating the lubricating grease. The oil scraping assembly is arranged on the first bell mouth structure. When the body assembly moves downward, the oil scraping assembly is used for scraping off the excess lubricating grease on the steel wire rope. The camera is arranged on the first bell mouth structure. The camera is used for shooting the position above the oil scraping assembly and transmitting the shooting information back to a terminal information receiving device, thereby reducing the difficulty and cost of inspection and maintenance.

The utility model relates to a kind of friction clutch structure for realizing braking by pneumatics, belong to the technical field of friction braking mechanism, including rotating shaft, the rotating shaft is equipped with transmission disc, the transmission disc side is equipped with with rotating shaft movable sleeve joint's brake pressure disc, the transmission disc and brake pressure disc between being equipped with friction plate, the friction plate is equipped with several annular distribution and with transmission disc screw thread type sleeve joint fixed counterbore screw, the transmission disc and rotating shaft between being equipped with spring that drive brake pressure disc is reset.With compact structure, operating stability is good and the characteristics of long service life.Adopt the design of thrust ball bearing, solve the friction wear problem between rotating component and stationary actuator.By air pressure to generate braking force, make transmission disc and friction plate combine, to realize braking;When air pressure disappears, through spring force to make component separate, restore transmission.

The utility model discloses a safety interlocking system of a monochlorodifluoromethane fluorination reactor, which is characterized in that the fluorination reactor is connected with a chloroform feeding pipeline, an anhydrous hydrogen fluoride feeding pipeline and a liquid chlorine feeding pipeline, the fluorination reactor is provided with a steam jacket, and the steam jacket is connected with a steam feeding pipeline and a condensate water outlet pipeline; the chloroform feeding pipeline is provided with a first chloroform feeding valve, the anhydrous hydrogen fluoride feeding pipeline is provided with a first anhydrous hydrogen fluoride feeding valve, and the steam feeding pipeline is provided with a first steam feeding valve; the fluorination reactor is provided with a temperature sensor and a first pressure sensor, and the first chloroform feed valve, the first anhydrous hydrogen fluoride feed valve, the first steam feed valve, the temperature sensor and the first pressure sensor are electrically connected with a dispersion instrument control system. According to the utility model, the first chloroform feed valve, the first anhydrous hydrogen fluoride feed valve and the first steam feed valve can be controlled to be closed when overtemperature and overpressure occur in the fluorination reactor, so that the production is ensured to be in a safe state.