Technical requirements for low-speed thruster

Jiangsu Du'an Environmental Protection Low Speed Thruster QJB4/4-2500/2-42 Type

（1) General requirements

A. Jiangsu Du'an Environmental Protection reasonably sets the installation positions of agitators and impellers based on the pool type and water depth, verifies and determines the quantity and power of agitators and impellers, and provides design drawings and performance curves.

B.The submersible mixer adopts a medium speed propeller, which isThree blades with guide rings.

C.The submersible thruster should be low-speed,Two blade impellers.

D.When the impeller and mixer are working, it is required that the horizontal flow velocity at the bottom of the pool be greater than0.3m/s to prevent sedimentation.

E. The impeller and mixer should be able to move up and down along the guide rod, rise and fall freely, and can be adjusted horizontally and vertically, and equipped with safety braking devices.

F. The guide rod and hanger should have sufficient strength and rigidity, and no deformation is allowed during the lifting and lowering process of the impeller.

（2) Technical requirements

A. Submersible thrusters should use axial flow impellers with good self-cleaning function, no vibration during operation, and optimized design, reinforced polyurethane casting blades, and undergo dynamic balance tests. The impeller should be able to efficiently stir and push the flow of fluid at the bottom of the pool. All blades should have the same shape.

B. The impeller and shaft are fixed at the end of the shaft with a key connection and sealed. The impeller and shaft must be locked to prevent loosening, whether they rotate forward or occasionally reverse.

C.The impeller should undergo dynamic and static balance tests.

D. The root of the blade should have sufficient strength, and no cracking or other situations are allowed to occur under the specified operating conditions.

E. The submersible mixer should be coaxial with the motor. The shaft of the agitator propeller must be an extension of the motor shaft. Lotus Union will not accept it.

F.The minimum design life of all bearings is100000 hours.

G. Each mixer should be equipped with a dual mechanical seal system. Sealed operation within the oil chamber, which can lubricate overlapping sealing surfaces at a stable flow rate.

（3) Motor

A.mixer/The motor of the mixer should be a submersible motor, with an insulation level of F for the stator winding and stator inlet wire, an insulation temperature of 155 ° C, and a protection level of IP68 for the motor.

B.The motor should be designed to continuously handle agitationStart 10 times per hour with a medium at 40 ° C. To monitor the temperature on each phase winding, a thermal switch should be installed in the stator inlet coil, which can be connected to the motor overload protection and to the control cabinet.

C.The submersible motor and mixer should be manufactured by the same manufacturer. The bidder shall provide the signal specifications of each protective sensor of the motor to ensure that the signal can be transmitted toMCC。

D. The stator winding of the motor needs to be equipped with an over temperature sensor.

E. Install anti leakage sensors to prevent liquid from entering the stator winding.

F. The water detection device should be installed in the cable connection room of the motor.

G.The rated power of the motor should be greater than the specified point axis power1.1 times.

（4) Cable inlet sealing

A. The cable inlet seal design should be able to eliminate a certain amount of torque to form a waterproof submersible seal. The seal should ensure the replacement of the cable and cannot be sealed with epoxy, silicon or other secondary sealing systems.

B. Measures should be taken to prevent air exchange inside and outside the cable due to temperature differences in the cable joint section.

C. The cable should be properly fixed in water, and the bidder should provide a fixing device.

（4) Electric control cabinet

The on-site control box is provided by the manufacturer, and the control box adopts transparent double-layer doors and stainless steelMade of 304 material, the bracket is also made of stainless steel 304 material, which can be firmly fixed; The thickness of the board shall not be less than 1.5mm, the outdoor protection level shall be IP55, and the indoor protection level shall not be lower than IP4X. Protective switches, control switches, and logic components shall be installed inside the box. The panel shall be equipped with a multifunctional meter, conversion switch, on/off button, emergency stop button, and operation indicator light. When the equipment fails, the operation of the equipment shall be stopped.

Jiangsu Du'an Environmental Protection shall provide a complete electrical control schematic diagram, wiring diagram, electrical component location diagram, specific wiring diagram numbers, and electrical component configuration list for each control box during bidding based on the performance requirements of the equipment provided and the above control requirements.

Must havePrimary components and operational functions such as circuit breakers, AC contactors, thermal relays (if required), and frequency converters (if required), with the main electrical components (circuit breakers, contactors, thermal relays) using Schneider, ABB, or Siemens products.

Reserved in the control cabinetThe wiring terminals connected to the PLC system should be clearly labeled, and the completed control drawings should be provided to enable automatic control of the PLC.

Jiangsu Du'an Environmental Protection Submersible Thruster Model Description:

Jiangsu Du'an Environmental Protection Submersible Thruster should be able to provide a written report before the thruster leaves the factory according to customer requirements, indicating that the mixer has passed the above tests.

Technical specifications for supporting electrical control cabinets

The supporting electrical control cabinet is wall mounted, with a size not less than400 × 300 × 200 (mm). The temperature range that the electrical control cabinet can withstand is -20~70 ℃, and it can prevent ultraviolet rays and direct sunlight. The material of the electrical control cabinet is polycarbonate, and the cabinet door has a transparent and visible operation panel with a protection level of IP65. The operation panel of the electric control cabinet displays parameters such as current, speed, energy consumption, etc. through a human-machine interface, and has fault displays for leakage, high temperature, overload, undervoltage, overvoltage, and phase loss. The speed of the mixer can be set and adjusted locally in the electric control cabinet. The production method of the electric control cabinet communicates with the central control room to remotely monitor and control the operation of the mixer.

Jiangsu Du'an Environmental Protection Submersible Propeller Material

Low speed thruster price