The GSJ/QSJ series hyperboloid mixers are patented products of our company. They are widely used in environmental protection, chemical, energy, light industry, and other sectors where solid, liquid, and gas exchange in liquids is required. They are particularly suitable for mixing and blending in coagulation tanks, regulation tanks, anaerobic tanks, aeration tanks, nitrification and denitrification tanks in wastewater treatment processes, as well as for handling various corrosive media.

I. Application Scope

The GSJ/QSJ series hyperboloid mixers are the latest products developed by our company. They are widely used in environmental protection, chemical, energy, light industry, and other sectors where solid, liquid, and gas exchange in liquids is required. They are particularly suitable for mixing and blending in coagulation tanks, regulation tanks, anaerobic tanks, aeration tanks, nitrification and denitrification tanks in wastewater treatment processes, as well as for handling various abrasive and high-temperature media.

II. Structural Overview

Hyperboloid mixers can be divided into two types based on installation method: GDJ type (dry type) and QDJ type (submersible type).

The GSJ type hyperboloid mixer consists of a geared motor, vibration damping seat, mixing shaft, hyperboloid impeller, electrical control box, and bridge frame (which can be provided by the user). The QDJ type hyperboloid mixer consists of a frame, lifting steel cable, main unit, hyperboloid impeller, and electrical control box.

III. Transportation and Storage

1. During transportation, the mixing shaft and impeller must not be subjected to pressure or collision. Lifting equipment should be used for loading and unloading, and the impeller surface should be protected from scratches.

2. For long-term storage, avoid high-temperature and high-humidity environments. The mixing shaft should be hung vertically, and the impeller should be placed on a flat surface to prevent deformation.

IV. Installation

GDJ Series Installation Steps

1. The bridge frame should be leveled, and the bridge frame columns should be vertically aligned. Anchor bolts and connection points must be secure and reliable.

2. Place the vibration damping seat on the designated position of the bridge frame, level it, and secure it to the bridge frame.

3. Install the geared motor on the vibration damping seat and secure it.

4. Connect and fasten the impeller to the mixing shaft flange with bolts.

5. Lower the impeller and mixing shaft into the tank. Connect and secure the mixing shaft to the output shaft of the geared motor. If there is water in the tank, first connect the shaft and impeller and lower them into the water, then connect the shaft to the geared motor.

6. After installation, the mixing shaft must be perpendicular to the horizontal plane. The vertical deviation should be less than 1/1000.

7. After installation, remove the motor rear cover and manually rotate the fan blades to check if the mixer operates smoothly and normally. The swing deviation of the mixing shaft should be less than 3/1000.

8. After connecting the power, briefly run the mixer to observe the rotation direction of the mixing shaft. The correct rotation direction, when viewed from above, is counterclockwise. If it rotates in the opposite direction, swap any two power supply wires.

9. Electrical equipment installation must comply with national regulations and safety procedures.

QDJ Series Installation Steps

1. Briefly run the mixer on land to observe the rotation direction of the impeller. The correct rotation direction, when viewed from above, is counterclockwise. If it rotates in the opposite direction, swap any two power supply wires.

2. Separate and secure the motor cable from the lifting cable. Do not bundle the cable and steel rope together. Prevent the steel rope and cable from being entangled in the impeller.

3. Use a crane to lift the hyperboloid mixer and slowly lower it into the tank at the designated position, taking care not to hit the tank walls.

4. Secure one end of the fixing rope to the bank and connect the cable to the electrical control cabinet.

V. Operation

After installation, the equipment must undergo a trial run. Before the trial run, fill the tank with approximately 70% of its volume with water. Do not operate the equipment without water, as this may cause the mixing shaft to bend due to uneven force. After the trial run, check the following:

1. Whether there are abnormal noises or temperature rise in the geared motor.

2. Whether the motor current is within the rated range (a short-term overcurrent during startup is normal).

3. The swing condition of the mixing shaft.

4. Whether there are any foreign objects in the tank.

If any abnormal conditions are observed in the above aspects, identify the cause and rectify it before use.

VI. Maintenance

1. For new machines, replace the gearbox lubricating oil and clean internal sludge after 200–300 hours of operation. Subsequently, replace the oil every six months to a year. For details on geared motor usage, refer to the manufacturer’s operation and maintenance manual.

2. Regularly check the tightness of the mixing shaft lock nut and all connecting bolts.

3. Regularly inspect the swing of the mixing shaft and promptly remove any entanglements on the impeller and shaft.

4. Regularly check for abnormal noises and temperature rise in rotating parts.

5. Regularly monitor the current for any abnormal changes.

6. Before restarting the equipment after a long period of inactivity, check the motor’s insulation. Also, prevent sediment buildup, which may cause difficulty in starting and damage the motor and impeller.

7. Keep records of all inspections. If any abnormalities occur, contact our company.

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