Introduction to pipeline pump installation and maintenance techniques
Pump assembly and disassembly:
Before the pump is assembled, all parts should be inspected. The mating surface of the parts, especially the friction surface of the mechanical seal should be cleaned. The sealing surface should not have obvious scratches, cracks, bumps and other defects. If any of the above defects should be replaced.
assembly:
Press the water retaining ring onto the motor shaft and fasten the middle seat to the motor with bolts.
After applying a lubricant such as petroleum jelly to the rubber ring of the mechanical seal static ring, press the static ring assembly into the middle seat, apply the cleaning grease on the sealing surface, install other sealing parts, install the flat key, the impeller and Stop the washer and press it with the bolt.
Note: The sealing rubber ring of the mechanical seal static ring is easy to be sideways during installation, which will cause the machine seal to leak and should be carefully inspected during installation.
Apply a proper amount of grease to the sealing end face of the middle seat and install an O-ring. When installing the O-ring, the sealing ring is easy to fall off and fold. Please be careful not to cause the water leakage to lift the motor assembly. The impeller is placed down into the pump body, then tightened with bolts, and the pipe plugs and venting plugs are installed. .
Turn the rotor by hand to check for any stuck.
Disassembly:
Follow the reverse steps of installation.
Note: When disassembling the mechanical seal, you can not directly hit the static ring with a hammer or a hammer, use the wood to gently tap and slowly remove the static ring. If it is difficult to disassemble due to dirt accumulation, it should be cleaned and disassembled first.
Installation, operation and maintenance of the unit:
installation:
When installing, choose a place close to the conveying liquid, so that the pump is installed in a suction line with a small suction height and a short ziu. Note: The distance between the unit and the surrounding obstacles should be greater than 150? Have access to adequate air sources.
When the pump is used in a place where the vibration requirements are strict, the damper (pad) can be used and must be installed according to the manufacturer's instructions.
The installation of the pipe should be securely fixed, and the pipe support at the pump flange should be sufficiently rigid to allow the pump to withstand the weight of the pipe.
The pump set should be installed to avoid direct sunlight and rain.
A vacuum pressure gauge shall be installed at the inlet of the pump, and a pressure gauge shall be installed at the outlet flange to observe and control the operation of the pump. The range of the pressure gauge should be 2 to 3 times the actual pressure.
Pump inlet and outlet lines should be fitted with gate valves for easy maintenance and operational adjustment.
maintain:
Always check whether the operation is smooth, the wear and leakage of the mechanical seal, and replace the seals in time to prevent the pressurized water from entering the motor.
Frequently check the temperature change of the motor casing, the pump is running normally, the temperature rise of the motor is allowed to reach 80 °C, if necessary, further check whether the motor current is overloaded and the three-phase current is unbalanced.
Always check the inlet tank for any changes in floats and water levels. If the inlet tank falls below the low water level of the zui, the pump should stop running to avoid cavitation and damage the impeller. If necessary, the gate valve can be adjusted to reduce the water output of the pump and promote the water level of the pool.
Pay attention to the changes in pressure gauges and ammeters, find abnormalities, and take appropriate measures in time.
When the pump is out of service for a long time, it should be drained to remove rust and coated with anti-rust grease.
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