Diesel fire pump will face huge reform China Portable fire pump
Diesel engine fire pump suction line should be short and straight. The pipe diameter should be greater than or equal to the pipe diameter of the suction inlet of the pump, and the elbow radius of the suction pipe of the pump should be made as large as possible. In order to prevent the diesel engine fire pump damage, China Portable fire pumpbefore the pump line connection, to clean the pipeline. The inlet and outlet water pipe shall be provided with another bracket support, and shall not be supported by the unit body.China Portable fire pump
The joint surface between diesel engine fire pump and pipeline should ensure good air tightness. In particular, the inlet pipe must be strictly sealed, and there should be no possibility of air nesting on the device. Diesel engine fire pump inlet pipe should be set up valve, whether using water tank irrigation or diversion, should be installed in the appropriate position of the screen. Diesel engine fire pump unit in the start and emergency shutdown, water hammer impact is relatively large. In order to prevent damage caused by water hammer impact and unit vibration to the connecting pipeline and diesel engine fire pump, flexible joints must be installed between the inlet and outlet of diesel engine fire pump and the pipeline. Diesel engine fire pump automatic unit such as containing preheating device and automatic charging device. In order to ensure that the unit can be put into operation at any time in cold climate, it is necessary to preheat the cooling water system of diesel engine fire pump. The preheating device adopts electric heating preheating device, and the water temperature can be controlled between 40℃ and 55℃.
The installation position of the automatic control cabinet of the diesel engine fire pump is not allowed to be arranged in front of the radiator of the diesel engine, because the hot air blown by the radiator may affect the normal work of the electrical appliances in the control cabinet. The control cabinet should be arranged on both sides of the unit as far as possible to facilitate the operation of the manual state of the unit. The diesel engine fire pump control cabinet and the unit and the main and auxiliary unit control cabinet are connected with cables, so the cable trench or cable bridge must be arranged in the corresponding position. The connection length between the diesel engine fire pump and the control cabinet shall not exceed 35 meters. The coaxiality of diesel engine fire pump may be offset due to transportation and hoisting. Therefore, it is necessary to re-calibrate the coaxiality of the unit after the diesel engine fire pump is installed on the basis of the concentricity tolerance of the two coupling circles is 0.1mm, the unevenness tolerance of the end clearance along the circumference is 0.3mm, to ensure the normal operation of the unit.
When the diesel engine fire pump starts automatically after receiving the fire alarm signal, the power supply of the preheating device will be automatically cut off. When the unit receives the fire alarm cancellation signal and stops working, the power supply of the preheating device will be automatically switched on. When controlled artificially, the current circuit breaker in the control panel can be used to stop the preheating system from working. There IS a MANUAL/AUTOMATIC SWITCH ON THE MAIN control panel OF diesel engine fire pump. When the unit needs to work in the automatic state, the switch should be switched to the automatic state, and the corresponding automatic working indicator lights up. In automatic state, the computer automatically detected signals (fire alarm or pipe network pressure low signal), immediately start the program three times, then the output enable signal, after the success of the launch, started the output signal success, then the output rise speed signal, during the period of acc, speed up from idle to rated speed, the running state of the diesel engine fire pump in fire control work. When the diesel engine fire pump fails to start, the second and third start procedures will be automatically carried out at an interval of 5 seconds. After three unsuccessful startup times, the startup failure signal will be output and the automatic system will be closed. After the fault is rectified, turn off the power key switch and then turn on the switch to unlock the lock.
Post time: Oct-14-2022