The flood prevention mobile pump truck is an emergency drainage equipment that integrates power, water pump, piping, control and a mobile chassis. It is specifically designed for emergency drainage in urban flooding situations, river flood emergencies, water accumulation in underpass tunnels, water backflow in underground garages, embankment inspections, and excavation pit drainage at construction sites, etc. These scenarios are characterized by "urgent arrival, large water volume, narrow space, and the need for quick transportation, pumping, and departure".

Product structure diagram

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01 Quick Connection
The quick connector makes the connection of pipelines easier and more convenient.
02 Control System
Diesel engine water pump controller, electromagnet start-up, outdoor waterproof box.
03 Easy Maintenance
It has a detachable sewage discharge and cleaning port, making cleaning and maintenance more convenient.
04 Flexible Mobility
Non-inflatable solid tires, shock-absorbing springs, hub, etc., with adjustable feet for elevation.

Working principle

The core of the flood prevention mobile pump truck is "self-priming + high flow rate + continuous operation". The overall power chain is roughly as follows:
Power end: Diesel engine (mainstream, as there is often no mains electricity on site) or dual diesel-electric (diesel engine + generator, which can switch to mains power). The power of the diesel engine is selected based on the pump shaft power × safety factor (usually 1.1–1.3) × self-priming heavy-load coefficient to ensure no engine stalling under full head and full flow.
Pump end (self-priming is key): Since the flood prevention site cannot provide you with the conditions for "pump filling and exhaust + bottom valve", most pump trucks are equipped with self-priming pumps - there are three common types:
Self-priming centrifugal (with self-priming cylinder/auxiliary impeller/gas-liquid separation chamber): Simple structure, easy maintenance, suitable for clear water/lightly turbid water
Lobe pump (convex rotor pump): Self-priming is strong (up to 7–9 m dry priming), has strong over-rotation capacity (can pass φ50–100 mm debris), insensitive to fibers, suitable for urban积水 containing floccules/floatables, but expensive
Self-priming mixed-flow/axial-flow (for large flow and low head emergency drainage scenarios, such as 2000 m³/h @ 5–8 m)
Water intake and drainage： The inlet pipe uses quick couplings and flexible hoses to reach the waterlogged area (or directly extend into the river/latrine pit opening), and the outlet pipe also uses quick couplings to lead to the drainage point (river/main trunk pipe/high ground discharge point). The self-priming pump first uses the first filling water/vacuum assistance to make the inlet pipe negative pressure, and after water enters the pump, it can operate continuously, and after stopping, the pump body retains some residual water, making it start up faster next time.

Core advantage

Mobile chassis: There are three common forms - ① Two-wheel trailer type (small size, 50–200 m³/h, can be towed by pickup/SUV, suitable for residential areas/underground garage entrances); ② Four-wheel light truck/freight truck chassis (medium size, 200–1000 m³/h, equipped with toolboxes, spare tires, and lighting masts); ③ Pickup truck-mounted frame type (medium-sized utility vehicle, good off-road performance, suitable for rural areas/dam roads).
Power system: Diesel engine is the main power source (complies with regulations of different regions, such as Euro V emission standards), equipped with electronic speed control + water temperature/oil pressure/rotational speed monitoring; High-end models are equipped with diesel-electric dual power supply + city power switching - uses electric motor for fuel saving and quietness when city power is available, automatically switches to diesel engine when city power is lost.
Self-priming pump unit: The pump is connected to the diesel engine through elastic coupling/extended coupling, and the base is used for vibration reduction; The pump inlet and outlet are equipped with quick coupling flanges + butterfly valves + pressure gauges; The first start-up includes a water filling port + exhaust valve.
Pipeline system: The inlet/outlet pipes are mostly fire hose type quick hoses (DN100–DN300 grades) equipped with aluminum alloy quick couplings, one roll of 20–30 m, suitable for one person to lay; The end of the inlet pipe is equipped with a water filter basket/grating head to prevent large debris from entering the pump.
Rainproof and control: The electrical control cabinet has IP54–IP65 protection, is locked, and has an internal heater (optional in the north); The control panel has an emergency stop button, operation/fault indicator lights, and a liquid level automatic control knob.

Application scenario

Urban flood emergency drainage: After heavy rain, water accumulates on main roads, low-lying areas, underpass tunnels, and entrances of underground garages. Pump trucks are sent to the scene and directly pump the water out, which is then discharged into nearby rivers, rainwater networks, or higher ground.
River and embankment emergency response: Pre-drainage before the flood season, emergency drainage when the water level exceeds the warning line, temporary additional drainage at dangerous sections, pump trucks can be deployed flexibly along the embankment road.
Underground space backflow: At subway entrances and exits, underground shopping malls, and sunken plazas, pump trucks are parked on the ground and use hoses to lower and pump water to the basement level.
Temporary drainage at construction sites, foundation pits, and mines: When the base pit or mine car park is flooded due to heavy rain, pump trucks are used to pump the water out from the periphery, without stopping production or with minimal production suspension.
Emergency duty and drills: The flood prevention material warehouses of municipal and emergency management departments, as well as those of petrochemical and power enterprises, always keep several pump trucks on standby. During the flood season, they are on duty 24 hours a day, and during non-flood seasons, they conduct drills and training exercises.

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