The high-rise, large-scale, multi-functional and complicated modern buildings, when the building is in a fire, the smoke-proof stairwell and its front room and refuge walkway are the life passages for evacuation of personnel and the passageways for firefighters to save, must ensure its Smoke resistance performance requirements. Le Bird Xiaobian will focus on the residual pressure monitoring system , which can effectively solve the fault that the pressure difference between the two sides of the evacuation door is too large, which can prevent the door from opening normally, and ensure the safe and smooth evacuation channel, so that the pressurized air supply system is reasonable and effective. The working condition provides a strong guarantee for evacuation and rescue in the event of fire. The residual pressure controller fire-fighting type standard specification residual pressure monitoring detector equipment is used to solve the problem that the safety evacuation passage fire door is difficult to open due to the excessive pressure of the evacuation passage in an emergency such as a fire. The system product intelligently adjusts the opening and closing state of the bypass pressure relief valve according to the on-site residual pressure value, so that the residual pressure value of the safety evacuation passage is kept within a suitable range, and the evacuation of personnel in an emergency situation is facilitated. Fire-fighting pressure sensor anti-smoke system (construction residual pressure monitoring system) - Because some projects are not carried out according to the specifications during the design and construction process, the natural smoke-exhausting facilities do not have the function of exhausting smoke after the completion of the project, and the reasons are analyzed. There are mainly the following aspects: First, the setting position of the natural smoke exhaust window is improper. Considering the effect of natural smoke exhaust, the height of the smoke exhaust window should be higher than the height of the smoke storage to ensure the safe evacuation of personnel. Generally, smoke exhaust windows are installed above half the height of the room. Currently, a considerable number of natural smoke exhaust windows are not installed in the wall. The upper part, but the lower part, has a larger distance from the top plate and the ceiling, which is not conducive to natural smoke exhaust. Second, the window opening area of ​​the natural smoke exhaust window does not meet the specification requirements. The national standard "Code for Fire Protection Design of High-rise Civil Buildings" stipulates that "the front room of the anti-smoke stairwell and the front room of the fire-fighting elevator room shall not be less than 2m2, and the front room shall not be less than 3m2; the anti-smoke stairway of the external wall shall be The sum of the total area of ​​the outer windows that can be opened in the five floors should not be less than 2m2", but some designers do not carefully calculate according to the specifications, or calculate the area of ​​the fixed window within the area of ​​the exhaust window, resulting in part of the project smoke exhaust The window area does not meet the specification requirements and directly affects the smoke exhausting effect. Third, the structural form of the natural smoke exhaust window is unreasonable. Some of the smoke exhaust windows are made into a non-openable fixed window, and some of the upper part of the window is made into a fixed window, and the openable smoke exhaust window is arranged at the lower part of the window, which seriously affects the smoke exhausting function. The music LNE residual pressure monitoring system consists of LNEH residual pressure monitoring host, LNEK residual pressure controller, LNEC residual pressure sensor and LNEF pressure relief valve actuator. LNEH residual pressure monitoring host is installed in the fire control room. Monitoring, connected to the LNEK residual pressure controller through the second bus, the LNEK residual pressure controller reads the residual pressure value and alarm value of the LNEC residual pressure sensor in real time, and then decompresses the fan through the LNEF pressure relief actuator, LNEK residual pressure The controller can be directly connected to the LNEH residual voltage monitoring host to form a small system. The LNEC residual pressure sensor provides on-site residual pressure and residual pressure alarms. The LNEF Pressure Relief Valve Actuator performs control signals from the LNEH residual pressure monitor to control pressure relief. Le Bird strictly follows the national standard GB50016-2014 "Code for Fire Protection of Building Design" and "Technical Specifications for Building Smoke Control System" to develop LNE residual pressure monitoring system . The system is an intelligent system integrating industrial computer technology, communication, anti-electromagnetic interference, digital sensing technology and industrial field bus control technology. It can perform 24-hour real-time automatic inspection on the working state of the residual pressure of the evacuation channel. The residual pressure in the abnormal state gives an alarm prompt. In the event of a fire, the system can automatically regulate the air supply volume of the mechanical pressurized air supply system, or remotely control it at the control center. Laser marking encompasses a wide variety of applications in manufacturing. Laser marking can be automated and processed at high speeds while leaving permanent traceability on all kinds of materials, including steel, titanium, aluminum, copper, ceramic, plastic, glass, wood, paper and cardboard. 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