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The residual pressure monitoring system makes our fire safety more secure
With the improvement of people's quality of life. The decoration and decoration are gradually becoming more and more high-grade, the number of electrical equipment is increasing, the increase of high-rise and super high-rise buildings, and the rapid expansion of the mass gathering places such as shopping malls and supermarkets, the importance of fire safety is becoming more and more prominent. With the development and maturity of intelligent building technology. More and more new buildings are using smart fire protection systems.
Wisdom fire consists of two parts, one is the automatic fire alarm system, that is, the perception and the central system, just like the five senses and the brain; the other part is the linkage fire extinguishing system, that is, the execution system, just like the human limbs. In this way, the intelligent fire protection system can detect the fire hazard of the building in time, take corresponding measures, and save in time to eliminate the fire that may cause a major disaster in the flame retardant period or the initial stage to prevent the disaster from expanding. There are many concerns about design and construction, and after putting into operation, there is often insufficient attention.
With the advancement of science and technology and the arrival of an information society, technologies in various fields have undergone various changes with the progress of the times. The application of the residual pressure monitoring system is a change in the fire work that is in line with the times. However, the application of the residual pressure monitoring system is not smooth, and there are still some problems in practical applications. Today, the bird editor said:
1. The anti-smoke stairwell, the anti-smoke joint stair front room and the front outdoor floor walkway respectively set the pressure sensor according to the specifications. The static pressure signals of the above regions are transmitted to the corresponding residual voltage control host through the bus. The residual voltage controllers are connected to each other. After calculation, the system can obtain the pressure difference signal between the smoke-proof stairwell-stairs front room on each floor and the pressure difference signal between the stair front room and the evacuation floor.
2. The CAN bus is used for communication between the pressure sensor and the controller. The controller continuously collects the pressure data of each stairwell, the front room and the floor, and calculates the differential pressure signal between the stair front room and the evacuation corridor of each floor. As the fire evacuation floor, the floor where the maximum pressure difference is located (the middle layer of a certain layer or an adjacent three floors). The controller will determine the switching logic of the bypass pressure relief valve based on the pressure difference calculated from the fire evacuation floor to eliminate system interference caused by the residual pressure difference of the remaining floors being too low or too high.
3. If the pressure difference between the smoke-proof stairwell and the evacuation corridor on the evacuation floor is greater than the set value (above: 70Pa, adjustable; underground: 60Pa, adjustable), then turn on the positive pressure blower outlet of the system. The electric bypass pressure relief valve is pressure-relieved; when the pressure difference is less than the set value (40Pa, adjustable), the electric bypass pressure relief valve at the outlet of the positive pressure blower of the system is turned down or turned off.
4 If the pressure difference between the front slab and the evacuated slab of the evacuation floor is greater than the set value (ground: 50Pa, adjustable; underground: 40Pa, adjustable), the electric bypass of the positive pressure blower outlet of the system is opened. The pressure relief valve is released; when the pressure difference is less than the set value (25Pa, adjustable), the electric bypass pressure relief valve at the outlet of the positive pressure blower of the system is closed.
5. After the various residual voltage controllers are connected, the controller communication bus is used to transmit signals to the fire control room management host. In addition to executing the established control logic in the fire state, the residual pressure controller periodically performs the system self-test and the pressure relief valve action inspection program under normal conditions. The self-test and valve body inspection results of each residual pressure controller are transmitted to the fire control room management host in real time through the controller communication bus.
The installation of the Lebe residual pressure monitoring system can perform 24-hour real-time automatic inspection on the working state of the residual pressure of the evacuation Channel , and give an alarm prompt to the residual pressure in an abnormal state. In the event of fire, the system can automatically adjust the air supply volume of the mechanical pressurized air supply system, and can also 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 safety of the evacuation channel . The pressurized air supply system is in a reasonable and effective working state, thereby providing a strong guarantee for the evacuation and rescue of personnel in the present fire situation.