Wall-Climbing Pump QJB-W4
QJB-W5.5 Sludge Recirculation Pump
Sludge Recirculation Pump Quotation
Material: 304 Stainless Steel
Voltage: 380V
Material: SUS304 Stainless Steel
Duwan Environmental QJB-W4 QJB-W5.5 Submersible Recirculation PumpsMain Components and Supply Scope (not limited to these):
A. Fully assembled submersible in-line pump (including propeller, mechanical seal, shaft, etc.)
Diving Motor
C. Inlet pump guide and mounting bracket, cable fasteners, steering and positioning devices
Enhance Chain
E. Mounting Bracket Fixing Seats (corresponding to the number of equipment)
F. Hangers and Lifting Devices
G. PerTaiRecirculating pump to be provided10-meter underwater cable and fittings, connectors, fasteners
Leak and Overheat Protection Device
I. All connecting accessories, chemical foundation bolts
Duwan Environmental QJB-W4 QJB-W5.5 Sludge Recirculation PumpsPrimary Material
Propeller: Stainless SteelAISI316Ti
Gearbox: Stainless Steel
Motor Housing: Stainless Steel
Axle Stainless SteelEN 16NiCr4
Mechanical Seal Silicon carbide/Silicon Carbide
Fasteners: Stainless Steel AISI 316
Cable jacket: Chloroprene rubber
O-rings Nitrile rubber or fluoro rubber
Recirculation Pump Bracket Stainless SteelAISI 304
Diverter ring Stainless SteelAISI 304
Flanged Connection: Stainless SteelAISI 304
Guide System: Stainless SteelAISI 304
Chain Hoist Stainless steelAISI 316
（1) Duwan Environmental Protection Sludge Recirculation Pump generally requires:
Each unitBackflowPumps should be capable of continuous operation under full immersion, intermittent operation, and recovery to operation after a long-term shutdown.
b. The pump should withstand reversal caused by backflow without causing any harm to the pump.
c. The pump unit, within the designed scope of supply, should be vibration-free, free of cavitation, and operate smoothly. The pump's rotor components should undergo dynamic and static balance tests.
d. The pump housing must have sufficient thickness to withstand all loads, including static water pressure test pressure and continuous working pressure.
The impeller and pump shaft are keyed and fixed at the end of the shaft, with sealing applied. Locking devices must be used on both the impeller and shaft to prevent loosening, whether the impeller and shaft are rotating clockwise or occasionally reversing.
f. The impeller should undergo dynamic and static balancing tests.
g. The shaft of the pump and motor should be a continuous, unbroken shaft, with the pump shaft being an extension of the motor shaft. Couplings are not acceptable.
h. The upper bearing should be a single-row ball bearing. The lower bearing should be a double-row radial thrust ball bearing, used for bearing radial forces and axial thrust. Its bearingsPlease provide the Chinese content that needs to be translated.Small work life100,000 hours.
i. The lower bearing should be equipped with a thermosensitive detector to monitor the bearing temperature. The detector must be in direct contact with the thrust bearing housing. If the temperature rises, the detector will sound an alarm and stop the pump.
Each pump should be equipped with a double, independent mechanical seal system with upper and lower components. The lower seal should be separated from the impeller hub. The mechanical seal must operate within the oil cavity, which provides lubrication to the overlapping seal surfaces at a stable flow rate. The mechanical seal should operate normally and without damage or loss of sealing elements in both clockwise and counterclockwise rotations, and should not require maintenance or adjustment.
k. The mixed liquid recirculation pump is mainly composed of a impeller, submersible motor, self-coupling system, outlet check valve and short pipe, guide rod, and lifting device, etc. Its design should ensure the pump's convenient and reliable operation. The pump is mounted on the guide rod for easy lowering. The self-coupling system ensures quick, convenient, and reliable connection to the pool wall water pipes.
The impeller of the mixed-liquid recirculation pump is a self-cleaning spiral propeller type impeller. Its structure should ensureMaximize utilizationFlow rate is smooth without clogging or slagging; the blade angle should be selected according to the operating conditions.NormalValue.
All mixed liquid recirculation pumps are equipped withImportedNSK Bearings。
Export Check Valve (including outlet short pipe)
a. The valve body sealing surface for door knock should have approximately 10°The inclination is sealed with a rubber soft seal, connecting to the outlet short pipe flange of the mixed liquid recirculation pump via a flange.
b. The gate valve is designed with a double-hinged structure, and there must be no casting defects in the valve body or plate. The surface is coated with anti-corrosion spray.
c. The resistance of the export flap does not affect the normal start-up and operation of the mixed liquid recirculation pump, and it is required that the flap has no leakage under the specified reverse head pressure.
（2) Electric Motor
The motor is an induction squirrel-cage motor.
Motor features a design specifically for submersible pumps and is capable of continuously pumping temperatures of40°Medium C. To monitor the temperature of each phase winding, a thermosensitive switch should be installed in the stator winding coils. The thermosensitive switch should be connected to the external motor overload protection and connected to the control cabinet.
Motor voltage fluctuations allowed:10%, motor design at 40%°Operate in an environment with a C temperature, and ensure the average temperature rise of the stator winding does not exceed 85.°C, a performance sheet showing torque, current, power factor, input/output power, and efficiency should be provided. The sheet should also include data on start-up and no-load characteristics.
Please provide the signal specifications for each protective sensor of the motor to ensure the signal can be transmitted.MCC。
The motor's stator winding must be fitted with an over-temperature sensor.
Install leak detection sensors to prevent liquid from entering the stator windings.
The water detection device should be installed in the motor's cable junction box.
（3) Cable Entry Seal
The cable entry seal design should be capable of eliminating certain torque to form a waterproof diving seal. Measures should be taken in the cable joint section to prevent air exchange between the cable's interior and exterior due to temperature differences. The cable entry seal should ensure ease of cable replacement and should not be sealed with epoxy, silicone, or any other secondary sealing systems.
Cable joint sections should take measures to prevent air exchange between the inner and outer cables due to temperature differences.
Cables should be protected reliably and secured to prevent damage from water flow impact.
Duwan Environmental QJB-WSludge Recirculation PumpWiring method:
Four-core wire: The three-core thick wire is the live wire for three-phase electricity, and the single-core wire is yellow.Green dual-color serves as the ground wire.
Five-core wire: Three cores of thick wire are for three-phase power lines, one core wire is yellowGreen dual-color is the ground wire, one-core wire is 31# wire (motor leakage signal wire)
Seven-core wire: Three-core thick wire is for three-phase power line, one-core wire is yellowThe green dual-color wire is the ground wire, one core wire is the 31# wire (motor leakage signal wire), and the other two core wires are the 11# and 12# wires (motor overheating protection signal wires).
