1、 Overview of NL Mud Submerged Pump

The main components of NL type submersible sewage cement slurry pump include volute, impeller, pump seat, pump casing, support cylinder, motor seat, electric motor, etc. The snail shell, pump seat, motor seat, and impeller nut are cast from pig iron, with good corrosion resistance and easy processing technology. The impeller consists of three single chord curved blades, which are semi enclosed and made of malleable cast iron, resulting in high strength and corrosion resistance; Easy processing, good passability, and high efficiency. In order to reduce weight and cutting volume, the pump shaft is made of high-quality carbon steel cold drawn round steel.

The NL type mud submersible pump can be used vertically or obliquely, with a small footprint. The volute needs to be buried in the working medium for easy start-up and does not require water intake. The rotation direction should be clockwise when viewed from the tail of the motor. There are various specifications for the length of the switchboard, so that users can choose according to their specific needs.

2、 Scope of application of NL submersible mud pump

1. The submersible sewage cement slurry pump is a single-stage single suction centrifugal pump used in mining, papermaking, printing and dyeing, environmental protection, graphite, mica, gold, ceramics, oil refining, petroleum, chemical industry, farms, salt fields, iodine fields, dyeing, brewing, food, fertilizer, coking, beneficiation, construction, marble plants, gold mines, mud, quicksand, mud ponds, sewage ponds, and polluted liquids for conveying thick liquids, loading materials, and suspended substances. It can also be used for mine drainage and fluids containing mud blocks.

2. If combined with high-pressure water pumps and water guns to form a hydraulic mechanized earthwork unit, it can be used for excavation and transportation of small water conservancy projects such as land leveling, dredging and excavation of rivers and ponds, as well as urban air defense and underground engineering.

3. Fish farming is used for carrying water to clear ponds, increasing oxygen in fish ponds, etc.

3、 Performance parameters of NL mud submersible pump

4、 Precautions for using NL mud submersible pump

1. The power supply for NL type sewage slurry submersible pump must be three-phase four wire system. If there is no grounding wire, it must be installed to prevent leakage. When working, it is necessary to install circuit fuses and switches that match the motor nearby to prevent damage to the motor caused by debris jamming the impeller.

2. The submersible sewage cement slurry pump can operate without installing any basic equipment, as long as it is firmly inclined. If necessary, it can be tied with ropes to prevent accidents. After starting, the rotation direction of the motor must be checked and must not be reversed for more than one minute.

3. When the liquid being sucked contains a lot of weeds, iron wires, wooden strips, bricks and other debris, it must be removed as much as possible in advance, and methods such as adding wire baskets can be used to prevent debris from being sucked into the pump, causing accidents such as impeller damage, jamming and pipeline blockage.

4. The pump body should be given short-term suction after absorbing mud and other pollutants, in order to flush the pump body and the interior of the pipeline.

5. When working outdoors, the motor should be equipped with a protective cover to prevent rainwater and other substances from entering the motor.

6. At the bottom of the river, the suction mud at the bottom of the pool should be hung on a tripod and can be moved on a float or boat for operation. During earthwork operations, the diameter of the soil blocks crushed by high-pressure water should not exceed one-third of the suction inlet.

7. The speed specified for NL type sewage slurry submersible pump is the maximum speed of the pump and cannot be arbitrarily increased; The use of reducing the speed is not limited, but the effectiveness is significantly reduced.

8. The submersible sewage cement slurry pump reduces the load when pumping thick mud, thick liquids, or high lift long-distance slurry, but cannot increase the load by changing the structure.

9. Normally, after running for about 1250 hours, regular maintenance of the pump should be carried out. The pump seat should be disassembled to check the bearings and the sealing condition of the pump. The grease should be cleaned and replaced, and if necessary, the oil seal, shaft sleeve, and other parts should be replaced. Please refer to the installation for maintenance and replacement of parts precautions. (Use mechanical seals to run the pump for about 3500 hours for regular maintenance).

When the NL type sewage slurry submersible pump is not used for a long time, the volute should be removed, the parts should be wiped dry, and a thin layer of oil should be applied to the relative motion joint surface. It should be stored in a dry place for future use.