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Flood control emergency mobile hand lift diesel fire pump

In civil buildings, there are many types and quantities of electrical equipment, not only fire fighting equipment such as fire pumps and sprinkler pumps. In order to meet the reliability of power consumption of these devices, when the municipal power grid cannot provide two independent power sources, the method of using diesel generator sets as a backup power source in the design is widely used.

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The so-called auxiliary impeller hydrodynamic seal of diesel engine fire pump refers to the installation of an open impeller in the opposite direction coaxially near the back of the impeller rear cover plate of the diesel engine fire pump. When the diesel engine fire pump is working, the auxiliary impeller rotates with the main shaft of the pump, and the liquid in the auxiliary impeller also rotates together, and the rotating liquid will generate an outward centrifugal force. pressure at the mechanical seal. On the other hand, the solid particles in the medium are prevented from entering the friction pair of the diesel engine fire pump seal, and the wear of the mechanical seal grinding block is reduced. In addition to the sealing function, the auxiliary impeller of the diesel engine fire pump can also reduce the axial force.

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    The diesel engine mobile pump truck is an intelligent control product, and the operation information is displayed in informational information. The running status display of diesel engine mobile pump truck includes: waiting, starting, fuel supply, starting, starting delay, idling delay, normal operation, cooling shutdown, emergency shutdown. The display of equipment operating parameters includes: water pump speed, water pump head, cooling temperature, lubricating oil pressure, water pump flow, running time, fuel stock, starting battery voltage and other parameters. Equipment protection settings include: overspeed, low speed, low oil pressure, high cooling temperature, low air temperature (below 4°C), low fuel level, low battery voltage, high battery voltage, uncalibrated speed signal, and water pump water pressure is too low and over Flow and other pre-alarms; no speed signal, overspeed, low speed, low oil pressure, high cooling temperature, start failure, shutdown failure, oil pressure sensor open/short circuit, water temperature sensor open/short circuit, speed sensor open/short circuit, water pump water pressure over Automatic alarm for low and over flow;

    When the diesel engine mobile pump truck is working, the diesel engine water pump relies on the high-speed rotating impeller, and the liquid obtains energy under the action of inertial centrifugal force to increase the pressure. Before the centrifugal pump works, the pump body and the inlet pipeline must be filled with liquid medium to prevent cavitation. When the impeller rotates rapidly, the blades make the medium rotate quickly, and the rotating medium flies out of the impeller under the action of centrifugal force. After the water in the pump is thrown out, the central part of the impeller forms a vacuum area. While continuously inhaling liquid, it continuously gives the inhaled liquid a certain amount of energy to discharge the liquid. The diesel engine water pump just works continuously like this.