Duwan Environmental WQ100-13-7.5 Submersible Sewage Pump

Duwan Environmental Sewage Pumps

Submersible pump coupling rod installation

Du'an Environmental ProtectionWQ100-13-7.5Submersible污水泵Vertical coupled submersible pump is used, with the submersible motor directly connected to the impeller shaft. The pump casing is made of...Cast IronThe pump casing inner surface is processed to be smooth, free of sand holes, blow holes, or other casting defects. All water flow passages should be designed in a non-sharp angle form to ensure a smooth change in flow rate and direction; the cross-section of the channel should be sufficiently large to allow all particles of the required size to pass through the impeller. The pump casing must have adequate thickness to withstand all loads, including the required static test pressure and continuous operating pressure. All metal surfaces of the pump casing that come into contact with the pumped liquid should be coated with an anti-corrosion layer. Each pump casing must undergo a static test in the manufacturing workshop, with the test pressure not less than the closing head.2 At least for the duration of the test, the factor (as shown in the characteristic curve) should be maintained.10minUnder this test pressure, no part of the pump shall exhibit any deformation or signs of deformation, nor shall any other defects be present.

Duwan Environmental WastewaterThe pump impeller features a non-clogging design, with all blades being of the same form and evenly spaced. Submersible pumps should be capable of passing through viscous materials, rags, waste paper, and plastics without experiencing clogging. The pump impeller must be cast as a whole, made ofCast Iron or EquivalentThe pump impeller must be carefully machined and surface treated, and must pass static and dynamic balancing tests, with the dynamic balancing accuracy not less thanISO1940 G6.3 The impeller efficiently transmits the motor's output power. After surface treatment, the impeller must be coated with an anti-corrosion layer. The impeller should be securely fastened at the end of the shaft to prevent loosening between the impeller and the shaft.

Pump shaft and motor shaft form an integrated structure and are completely separated from the flowing water.

The pump shaft is made of high-strength, corrosion-resistant stainless steel. The pump shaft should possess adequate strength and rigidity to withstand normal operation, start-up, and shutdown conditions.Please provide the Chinese content you would like translated.High torque to ensure smooth pump operation.

The bearings for pumps and motors are wear-resistant, capable of withstanding all axial and radial loads under all operating conditions, and are completely separated from the water flow being pumped. Their service life should not be less than100000 Hours. To achieve effective sealing between the casing and impeller, a wear-resistant ring must be installed. The wear-resistant ring must be securely fastened to the pump casing without loosening under normal operating conditions or during reverse operation. The fastening of the wear-resistant ring should consider ease of removal and replacement. If the impeller gap is adjustable, a wear-resistant ring may not be necessary. A double upper and lower arrangement is used.SingleHigh-quality mechanical seal system with rotation capability in both clockwise and counterclockwise directions.

Mechanical seals are all made of silicon carbide./Tungsten carbide, with a pH range ofpH2～10The mechanical seal is maintenance-free, isolated from the lubricant and the fluid being conveyed, capable of withstanding thermal shock, and features excellent emergency operation characteristics.

The motor's protection grade isIP68 Grade, Insulation grade not less thanF Ensure an appropriate rated power to prevent the pump from overloading throughout its performance curve.

The motor should be capable of starting every hour.10 Next.

The motor shaft and rotor have passed dynamic and static balance tests.

Motor designed for high40℃Operate in an environment.

Pump heads and motors capable of immersion and continuous pumping of high viscosity fluids40℃The liquid, and the average temperature rise of the stator winding does not exceed80℃The selection of motor power should ensure that there will be no overload at any point within the operating range, and the safety margin when designing the flow rate should not be less than10％。

The motor of the submersible pump should be sufficiently cooled by the liquid, without relying on an external cooling system, to ensure adequate heat dissipation whether the motor is immersed in the liquid being pumped or the upper part is directly exposed to the air. A document showing torque, current, power factor, input... should be provided./Performance curve chart of output power and efficiency, which should also include characteristic data at start-up and no-load start-up.

The power and control cables for the motor should be oil-resistant insulated cables suitable for underwater use, so that even if the cables are damaged, water will not enter the motor cavity along the cable lines. Each cable should have a separate entrance, and reusable waterproof sealing rings should be used to seal where the cable enters the junction box. The water-sealed design of the cable entry must meet the specified torque requirements to ensure the reliability of the潜水 seal.

The specific types of protective probes required for centrifugal pumps are as follows: A leakage sensing alarm device should be installed in the seal chamber of the submersible pump; a coil temperature sensing alarm device and a motor chamber leakage sensing alarm device should be installed in the motor chamber; a leakage sensing alarm device should be installed in the pump wiring chamber. The temperature sensing alarm device uses a thermal resistor or bimetallic strip, and outputs an inactive contact signal through the alarm transmitter.(Alarm generator can be installed inside the field control cabinet)Leakage sensor alarm devices should be capable of outputting passive contact signals.(Switching quantity signal)The motor cavity should be equipped with a condensation prevention device.

Jiangsu Du'an Environmental ProtectionWQ100-13-7.5All materials for the submersible pump should be suitable for corrosive environments compatible with wastewater medium characteristics.

Jiangsu Du'an Environmental ProtectionMain components and materials of a sewage submersible pump:

Pump BodyCast IronOr equivalent

Impeller:Cast IronOr equivalent

Spindle:Cast IronOr equivalent

Abrasion-resistant lining:Cast IronOr equivalent

Shaft Seal: Mechanical Seal

Diving Motor Housing:Cast IronOr equivalent

Pilot Rod (or Cable), Hoist Chain:Stainless Steel304Or Equivalent

SinceDynamicCoupler:Cast IronOr equivalent

All fasteners and connectors:Cast Iron

Each pump is equipped with a fixed outlet connection elbow. The pump should be able to be lowered into the well and positioned using two parallel rods or rope guides, and can be automatically connected to the outlet elbow bracket via an automatic coupler. Additionally, it should facilitate easy lifting of the pump above ground level for maintenance.

The seal between the pump housing and the outlet elbow support can be easily adjusted by moving the pump vertically down. The outlet elbow support and the sliding guide coupling device should be considered an integral part of the pump equipment. The entire weight of the pump equipment should be securely pressed against the outlet elbow by the contact between the flanges of the automatic coupling device.

Submersible pumps and their accessories, cables, etc., should be capable of immersion in10 The parts should run continuously in water without damage and must have reliable sealing. Assembly marks must be made on the components, and locating pins should be provided where necessary to ensure correct reassembly and positioning on-site.

Jiangsu Du'an Environmental Protection Submersible PumpTechnical Requirements：

Duwan WQ100-13-7.5Submersible污水泵，Is referred to as a wholeSetSubmersible pump unit, including pump and motorCables, automatic couplings, rods, lifting devices, andOther auxiliary equipment.

Each submersible sewage pump is fully equipped with the necessary accessories, fasteners, and spare parts for safe, effective, and reliable operation.And the on-site stainless steel control cabinet。

Submersible sewage pumps are vertical, single-stage, self-priming, non-clog impeller pumps; the submersible motor is connected to the pump body, and the pump must be capable of transporting raw and unfiltered sewage. The submersible sewage pump should operate safely, stably, efficiently, and continuously under the specified operating conditions. The continuous operation cycle should not be less than8000 Hour, life span not less than15 Year.

Submersible pumps must operate smoothly without vibration or cavitation throughout the entire design load range. All rotating parts of the pump (including the motor) should undergo static balance tests during manufacturing and dynamic balance tests after assembly, with an accuracy of at leastISO1940 G6.3Grade requirements.

Submersible pumps should be capable of continuous operation (daily) under full immersion conditions.24Operation for hours and should be suitable for intermittent operation (can meet every hour)10Requirements for restarting after temporary shutdowns and returning to normal operation after long-term downtime.

Pumps with automatic coupling installation require each pump to be equipped with an outlet bend pipe, an auto-coupling base, and a stainless steel guide rail or cable with a lifting chain for connection during movement and automatic alignment. The pump should be able to slide freely from the top of the pump pit to the auto-coupling base guided by the rail or cable. The pump should automatically couple securely to the base. The entire weight of the pump, including the motor, is supported by the pump's auto-coupling base, and no part of the pump or motor should come into direct contact with or be placed on the pump pit bottom plate or its supports.

Each pump is equipped with a lifting lug at the pump's center of gravity, suitable for the hoisting device.

Scope of Supply (all configuration requirements shall be executed according to the scope of supply)

Regulates technical requirements for the manufacture, supply, factory testing, installation, on-site inspection, and debugging of submersible pumps.

Main Components of the Equipment and Supply Scope (not limited to):

· Fully assembled submersible pump (including pump housing, impeller, mechanical seal, pump shaft, etc.)

· Wear Ring

Diving Motor

· Base, duck-bill elbow and coupling device

· Elevating Device (guide rods, brackets, chains, and fastening bolts, etc.)

Each pump must be supplied20Underwater cables and protective sleeves, connectors, fasteners, cable junction boxes

· Localized Control Box (including: leak detection, overheat protection, low liquid level protection, and leakage protection)

All power, control, and signal cables from the electrical control cabinet to the local equipment, as well as cable trays, conduit (including hot-dip galvanized steel pipes, flame-retardant metal hoses, connectors, and all other accessories).

· All connecting accessories, chemical anchor bolts