From the point of view of the collection and control of the starting signal of the fire pump of Liangbang Pump, there are mainly two methods for the main and standby switching of the fire pump in the design. The key is the choice of control signal source. It can be divided into current signal control method and pressure signal control method. Normally, the main and standby pumps of the fire pump need to be designed in a mutually redundant manner.
The current signal control method is a common method for the main and standby switching of the fire pump in the current fire design. It judges whether the fire pump is working by feeding back the motor current signal of the pump. When the motor is short-circuited (off) and the current is too high, the power supply automatically switches to the motor of another pump unit, stopping the work of the first fire pump and starting another fire pump.
The pressure signal control method is to set an electric node pressure gauge on the water outlet main pipe of the fire pump, and the switching of the main and standby fire pump of the Liangbang pump industry is judged by the signal of the pressure gauge. When the fire pump control box receives an action command, it immediately starts any fire pump. If the pressure indicated by the pressure gauge of the electrical node after the fire pump works fails to reach the set pressure value, the control box will automatically switch to another. Fire pump, start work.
Of course, the principle of electrical fire pump control can be arbitrarily designated a fire pump as the main pump or standby pump. The current signal control method is the earliest and most used in the country at present, and the pressure signal control method is used in the foreign automatic sprinkler system. The pressure signal control method provides a reliable method for the automatic control of the fire water supply system.
Author: Yong Jia Liangbang pump manufacturers
Material of Flange:Q235 Plastic Spray and Zinc electroplating
Flange Standard:GB,DIN2576,ANSI,150LB,BS4504,JIS
The current signal control method is a common method for the main and standby switching of the fire pump in the current fire design. It judges whether the fire pump is working by feeding back the motor current signal of the pump. When the motor is short-circuited (off) and the current is too high, the power supply automatically switches to the motor of another pump unit, stopping the work of the first fire pump and starting another fire pump.
The pressure signal control method is to set an electric node pressure gauge on the water outlet main pipe of the fire pump, and the switching of the main and standby fire pump of the Liangbang pump industry is judged by the signal of the pressure gauge. When the fire pump control box receives an action command, it immediately starts any fire pump. If the pressure indicated by the pressure gauge of the electrical node after the fire pump works fails to reach the set pressure value, the control box will automatically switch to another. Fire pump, start work.
Of course, the principle of electrical fire pump control can be arbitrarily designated a fire pump as the main pump or standby pump. The current signal control method is the earliest and most used in the country at present, and the pressure signal control method is used in the foreign automatic sprinkler system. The pressure signal control method provides a reliable method for the automatic control of the fire water supply system.
Author: Yong Jia Liangbang pump manufacturers
Rubber Flexible Joint comsist of fabric reinforced rubber and metal flange or threaded union joint,main function are pipe connector shock decrease,compensation for displacement.also called shock absorber,pipe soft joint,which are high flexible,high air tightness ,resistance to medium and weather resistance of pipe joints.
Size for flange type:DN15~DN3000
Size for threaded union type: DN32-DN80
Material of Rubber:NR/EPDM/NBR/NEOPRENEMaterial of Flange:Q235 Plastic Spray and Zinc electroplating
Flange Standard:GB,DIN2576,ANSI,150LB,BS4504,JIS
Union Standard: DIN, BS, ANSI
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