FT-QJ floating submersible pump

Brief introduction

The FT-QJ floating submersible electric pump is a water lifting equipment improved from the QJ well submersible pump. The entire unit of this product operates in floating water, extracting river and lake water to the surface for use in urban and rural industrial and mining enterprises, drainage, agricultural irrigation, and under seawater conditions.

This series of submersible electric pumps has a complete design, reasonable structure, low noise, long service life, small size, light weight, easy installation and maintenance, high efficiency, and energy-saving lamp characteristics.

Usage conditions:

A three-phase AC power supply with a voltage deviation of 380V not exceeding ± 5% and a frequency deviation of 50Hz not exceeding ± 1%.

2. The motor chamber must be filled with distilled water (or clean water).

3. The first stage impeller of the water pump should penetrate at least 3m below the dynamic water level, the electric pump unit should not penetrate more than 70m below the static water level, and the distance from the bottom of the motor to the bottom of the well should not be less than 5m.

4. The water temperature should not exceed 20 ° C.

5. The solid content in water (by mass) shall not exceed 0.01%.

6. The pH value of water is 6.5-8.5

The content of hydrogen sulfide in water shall not exceed 1.5 mg/L.

The content of chloride ions in water shall not exceed 400 mg/L.

2、 Model meaning

1. Model Description

3、 Selection of submersible pumps

1. Understanding of the well:

To make a reasonable selection and use of submersible electric pumps, it is necessary to understand the following: (1) various requirements in the usage conditions. (2) Inner diameter and depth of deep well pipes. (3) The static and dynamic water levels of deep wells. (4) The optimal water inflow for deep wells.

2. Calculation of the head of the submersible electric pump:

Due to the impeller of the submersible electric pump entering the water for operation, the suction lift is not considered, and the total head of the pump is H=H1+H2+V2²/2g+h

In the formula: H1-The vertical distance from the dynamic water level to the pressure measuring point at the pump seat outlet (in meters);

H2-The reading of the pressure gauge at the outlet of the pump seat is multiplied by 102 meters (in MPa);

V2²/2g-Pump seat outletKinetic energy head at the pressure measuring point (meters);

Regardless of the loss along the way in the well.

4、 Structural description

The entire unit of QJ series clean water electric pump consists of pump working part, submersible motor, pipeline part (including lifting pipe, pump seat, etc.), cable gate valve, control cabinet, etc. The pump and motor are directly connected through a coupling and operate underwater.

The working part of the pump is the core of the unit. It consists of components such as impeller, middle shell, upper shell, pump shaft, bearings, inlet joint, check valve, and valve body.

2. The submersible motor is the power source of the unit. Composed of stator, rotor, upper and lower guide bearings, thrust bearings, base, connecting frame, sealing device, etc. (See structural diagram for details)