The pump head of the dredging pump is the most front-end core assembly of the dredge pump (Dredge Pump), specifically responsible for the dredging and filling operations in rivers, lakes and seas, as well as the pumping of slurry. The dredge pump itself is a single-stage single-suction cantilever horizontal centrifugal pump. The pump head, as the wet end assembly, is composed of components such as the pump body, pump cover, front guard plate, rear guard plate, impeller, and connecting body: among them, the front guard plate, rear guard plate, impeller, and pump body are made of high-hardness wear-resistant cast steel; the pump cover and connecting body are pressure-bearing components, made of ductile iron; the front guard plate and pump cover, the rear guard plate and connecting body, and the pump cover and pump body all have keyway fits.
Product structure features
Flow control components made of high-chromium alloy, with hardness ≥ 58HRC - The impeller, sleeve, and front and rear guard plates are made of A05 high-chromium white iron (with 23%-30% chromium), having a hardness of no less than 58HRC. Their ability to resist cutting and grinding by sharp sandstone particles is 5-8 times that of ordinary cast iron; they can be upgraded to A07/A33/A49 to cope with stronger abrasion and corrosion.
Super large particle throughput capacity - The maximum particle size for the WN series is 240-354 mm, allowing smooth pumping of pebbles, shells, and waste metals without the need for secondary crushing.
Single-shell/double-shell dual structure - The 200WN-500WN single-shell structure is lightweight and easy to maintain; the 600WN-1000WN double-shell structure has an inner liner that can work until it wears out, and even if the inner liner cracks, water will not enter the pump.
Application scenario
The pump head of the dredging pump follows the mud dredging pump. The core scenario is "pump head replacement and complete machine matching under extreme abrasive conditions":
River dredging and waterway maintenance
River dredging in deep-water waterways such as the Yangtze River Estuary, Tianjin Port, and Rotterdam Port: 600WN-1000WN double-shell pump heads, with a flow rate of 5000-25000 m³/h. The double-shell structure ensures that the protective cover can work until it wears out.
River dredging and lake management (such as environmental dredging in Taihu Lake, Dongting Lake, and Poyang Lake)
Reclamation and port construction
Reclamation projects in Xiamen New Airport, Dalian Jinzhou Bay, and Saudi NEOM City: 800WN-1000WN high-flow pump heads, with a flow rate of 10000-25000 m³/h
Port construction and breakwater projects: Sand and slurry transportation
Sand extraction and mining
Dredging and gold mining in Malaysia's Perak River and Congo's Kasai River: 300WN-500WN single-shell pump heads
Underwater mining (diamonds, polymetallic nodules): Deep-sea dredging pump pump heads, resistant to seawater corrosion (optional A49 or duplex steel)
Inland sand mining: G series gravel pump heads
Mine tailings and industrial slurry
Tailings transportation in Zhenmen Mountain Tailings Repository, Chile's Escondido Copper Mine, etc.: WN/ZN series high-flow pump heads
Transportation of fly ash from thermal power plants and red mud from alumina plants: A05/A49 high-chrome pump heads
Coastal wind farm foundation excavation: Dredging pump pump heads for matching
Emergency rescue and coastal protection
Seepage control during the flood season of the Yellow River and opening of the waterway after typhoons: Mobile dredging pump pump heads
Coastal protection of Qingdao Jiaozhou Bay, sand replenishment for artificial beaches in Maldives: Dredging pump pump heads of the dredging vessel
Supplier Introduction
CZME is a world-class manufacturer of high-performance pumping solutions, serving industries such as mining, construction, environmental protection, and water treatment. We specialize in the production of Slurry pumps, Dredge pumps, Desulfurization pump, Marine dredging pumps, and other industrial pumps designed for handling solid-laden, highly abrasive, and corrosive slurries. Our expertise in slurry and wastewater management makes us a trusted partner for clients worldwide.
FAQs
Q: What are the differences between the pump head of the dredging pump and the casing of the slurry pump?
A: Both are flow components, but the working conditions are different: the casing of the slurry pump is designed to handle "abrasive slurries" (with solid content < 30% and particle size < 20 mm); the pump head of the dredging pump is designed to handle "extremely abrasive + large particles + sharp edges + high flow rate" extreme conditions (with solid content up to 40% and particle size up to 354 mm), and it is the total assembly concept at the front end of the entire machine (including impeller, sleeve, front and rear guard plates, pump body, pump cover, connection body, all wet-end components). Therefore, the pump head of the dredging pump requires higher chromium content (A05 23%-30% chromium, hardness ≥ 58HRC), single shell/double shell double structure, L-shaped rubber thread seal, etc. as exclusive designs. In simple terms: The pump head of the dredging pump is the "enhanced assembly version" of the slurry pump casing.
Q: How to choose between single shell and double shell?
A: For small and medium-sized sand extraction/inland dredging (flow < 6000 m³/h) → single shell 200WN-500WN pump head (simple structure, light weight, easy to disassemble and assemble); for large-scale deep-sea dredging/land reclamation (flow > 5000 m³/h, long-term continuous operation) → double shell 600WN-1000WN pump head (double-shell design ensures that the sleeve can work until it wears out, even if the inner liner cracks, water will not enter the pump, and the maintenance interval is long). The two are complementary.
Q: How long can the A05 high-chromium pump head last in sand extraction conditions?
A: In river sand conditions with a solid content of ≤ 30%, the average lifespan of the A05 high-chromium alloy (hardness ≥ 58HRC) flow components is ≥ 8000 hours (about 11 months of continuous use); the lifespan of the guard plate and liner is ≥ 6000 hours. If the medium is granite debris, basalt, etc., with extremely strong abrasion conditions, it is recommended to upgrade to A07 material, and the lifespan can be extended by 30-50%.
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