Centrifugal pump outlet soft connection
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How should the nut of the soft connection limit rod at the outlet of the centrifugal pump be fixed? Is the position in the picture correct?
Yes, this is correct for the outlet, and the inlet limits the internal thread pitch of the flange. According to the different pressures, the pipe position is prevented from being deformed due to stress.
right! ! The filament is the limiter of the soft connection. It can be shortened but cannot be over-stretched, otherwise the soft connection will be destroyed! ! :)
The long screw has several functions: 1. When installing the soft connection, use the long screw to compress the soft connection to a shorter point to make it easier to put it in. 2. After the flanges on both sides are completely tight and there is no leakage, it will act as a limiter to prevent excessive stretching or compression from damaging the soft connection.
This is called a positioning soft connection. When the water pump inlet and outlet pipelines are under pressure, the soft joints will expand or contract according to the action force and reaction force. After positioning is used, this displacement can be limited to prevent force from being applied to the pump body. Whether you are importing or exporting, you must tighten the four screws.
The same principle as the telescopic butterfly valve depends on the direction of the restriction. If the soft connection is released on both sides, the soft connection will be torn if stretched, so both sides must be restricted, but if the installation size is small, it is allowed.； If it is too small, the soft connection can withstand it and the pipe expansion and contraction is insufficient, so the nut in the middle should have a limiting function and should not be in the middle.
This is the safest. If your outlet pipe has a thrust pier, you can also leave some space without tightening the outer bolts, but not too much. This can reduce the reaction force on the pump when the pump is started instantly.