7results about How to "Avoid Secondary Disasters" patented technology

The invention discloses a wide coal pillar lateral stress peak position blasting roof-cutting pressure relief method which comprises the following steps: step 1, according to a working face drilling histogram, calculating and determining a low-position key rock layer position by adopting a formula; 2, calculating the width of a working face coal pillar goaf side plastic zone by adopting a formula; 3, blasting drilling parameters are determined according to the position of the low-position key rock layer and the width of a plastic zone on the coal pillar goaf side; and 4, after blasting drilling parameters are determined, blasting drilling is conducted, in the working face advanced mining influence range, blasting top cutting is conducted on a working face air side roadway low-position key rock stratum cantilever structure, and continuous forward implementation is conducted along with working face stoping till working face stoping is completed. According to the method, the length of the lateral cantilever of the low-position key rock stratum of the goaf is reduced, the influence of the cantilever structure on stress concentration of the coal pillar is weakened, the internal stress of the coal pillar is reduced, and the stability of the goaf side roadway of the working face in the working face stoping period is ensured.

The application discloses an emergency power supply box with open-break power distribution terminals, and belongs to the technical field of emergency power supply boxes. The power supply box comprises four interval-parallel arranged power connection copper bar assemblies, which are divided into two groups and are respectively used for connecting zero lines and live lines of power supply cables and emergency cables; one grounding copper bar assembly is used for grounding connection with the power supply cables, the emergency cables and the power distribution terminals; a plurality of power distribution terminals are in sliding connection with the power connection copper bar assemblies, and are controlled by a control assembly to be respectively electrically connected with the power connection copper bar assemblies connected with the power supply cables or the emergency cables and simultaneously electrically connected with user cables; a box body is used for containing the above components, and a cable outlet is arranged at the bottom of the box body; and an emergency power supply interface is arranged outside the box body and is electrically connected with the emergency cables. The application replaces manual operation with mechanical automatic switching, and replaces scattered parts assembly with modular integration, so that the emergency power supply is fast, safe and standardized, and is especially suitable for power emergency protection of high-rise residential areas under extreme weather such as floods and typhoons.

A kind of field cable self snow removal device mainly includes: base body, short connecting rod, long connecting rod, weight and snow accumulation component;Wherein: base body is used to be installed on cable, and keep relative fixed with cable;Base body extends short connecting rod and long connecting rod to both sides of cable on the side wall around cable, long connecting rod connects snow accumulation component, the upper surface of snow accumulation component is plane, for receiving snowfall;Short connecting rod connects weight, for balancing long connecting rod and snow accumulation component, after installation, the upper surface of long connecting rod and the snow accumulation component connected therewith are all horizontal relative to cable, short connecting rod and the weight connected therewith, and long connecting rod and the snow accumulation component connected therewith are mutually balanced.The device increases the utilization of external wind force and gravity of snow itself of cable under snow weather by the setting of snow accumulation component, can effectively reduce the accumulation of its own snow, reduce secondary disaster.

The utility model relates to the technical field of firewalls, in particular to a firewall structure which comprises a floor slab, an air pipe and a suspended ceiling, the air pipe and the suspended ceiling are arranged on the floor slab, and the air pipe is arranged between the floor slab and the suspended ceiling. A fireproof valve is arranged on the air pipe, a fire insulation layer is arranged on the side, away from the air pipe, of the floor slab, the outer surface of the air pipe is coated with a fireproof layer, a flexible heat insulation damping body of a spiral structure is arranged between the fireproof layer and the air pipe, and a supporting structure is arranged between the air pipe and the floor slab. The fireproof performance and the structural stability are improved through multiple designs. The fireproof valve, the fire insulation layer and the fireproof layer form a plurality of fireproof barriers, so that fire spreading is effectively blocked; the flexible heat insulation and shock absorption body of the spiral structure has heat insulation and shock absorption functions; the supporting structure enhances the stability of the air pipe and prevents the air pipe from falling off. All the components are in synergistic effect, the fireproof safety and practicability of the firewall structure are remarkably improved, and the fire risk and the equipment loss are reduced.

The invention relates to the technical field of explosion-proof electric appliance cabinets, in particular to a pressure-relief explosion-proof electric appliance cabinet which comprises a cabinet body, a pressure relief valve, a positive pressure system and an isolation assembly. The cabinet body comprises an outer shell and an inner shell; the isolation assembly comprises four groups of isolation plates, a pressure relief cavity formed between the isolation plates and the inner shell, and a pressure relief plate connected with the isolation plates; a pressure valve is arranged at the corner angle of the inner shell; a positive pressure cavity is formed between the outer shell and the inner shell, and a mounting cavity is formed in the inner shell; and when high pressure is generated in the mounting cavity, the isolation plate is opened to introduce high-pressure gas into the pressure relief cavity for pressure relief. According to the invention, by arranging the isolation assembly to isolate the electrical components in the inner shell and arranging the pressure relief cavity, secondary disasters caused by internal high-temperature and high-pressure gas leakage can be prevented through the pressure relief cavity when the internal electrical components break down and burn.

The invention discloses a nuclear power circulating water pump multi-agent operation and maintenance system based on an industrial physics AI engine, and relates to the technical field of intelligent operation and maintenance of nuclear power station equipment, the nuclear power circulating water pump multi-agent operation and maintenance system comprises a data acquisition agent, the industrial physics AI engine, a coordination agent, an operation and maintenance knowledge base and an operation and maintenance assistant agent, according to the method, a data driving model and a physical mechanism model are fused, the method is specially designed for the nuclear power circulating water pump, predictive maintenance and intelligent decision making of the nuclear power circulating water pump are achieved through the fusion data driving and physical mechanism model of a multi-agent collaboration framework and an industrial physical AI engine, and integration of a dynamic knowledge base and natural language interaction; compared with a traditional method, the operation efficiency and safety are remarkably improved, an industrial physics AI engine serves as a core, seamless fusion of a data model and a mechanism model is ensured, the fault prediction accuracy, scientificity and interpretability are improved, and secondary disasters caused by sudden faults are avoided.

The utility model provides an explosion-resistant / explosion-suppression dual-protection flameless relief device for pressure-bearing equipment of petrochemical enterprises, which relates to the technical field of safe overpressure relief, fire resistance and explosion suppression and comprises a pressure-bearing mechanism, an explosion venting mechanism, an intelligent fire extinguishing mechanism and a relief pipeline. The pressure bearing mechanism is connected with the explosion venting mechanism through a discharge pipeline; the explosion relief protection effect can be achieved through an adjustable compression spring and a spring gland valve seat in an explosion venting valve body in the explosion venting mechanism. And the spring pressure adjusting rod and the pressure sensor can adjust and monitor the pressing force of the spring, so that the explosion relief pressure can be adjusted and controlled. According to the device, high-temperature gas, flames and pressure waves in the pressure-bearing mechanism are discharged into the explosion venting mechanism through the release pipeline and the release valve body, so that the explosion pressure is prevented from reaching a threshold value of the pressure-bearing mechanism; the discharged high-temperature gas, flames and pressure waves are subjected to safety treatment in the explosion venting mechanism; and effective protection on the pressure-bearing equipment is realized.