Nuclear power station large horizontal centrifugal pump king bolt stretching labor-saving device
A nuclear power plant, large-scale technology, applied in the direction of hand-held tools, manufacturing tools, etc., can solve the problems of increasing the collective dose value of maintenance personnel, prolonging maintenance time, etc., and achieve the effects of improving maintenance efficiency, reducing labor intensity, and facilitating operation
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[0032] The present invention will be further described below through the accompanying drawings and specific embodiments.
[0033] like figure 1 As shown, the large cover 2 of the pump body is a circular plate-like structure, 16 mounting holes are evenly machined on the circumference, and 16 main bolts 8 are arranged through the main bolt nuts 9 and the main bolt washers 10 . A shaft hole is machined in the center of the large cover 2 of the pump body, and the pump shaft is installed in the hole.
[0034] The balance drum 1 is fixed on the pump shaft and fits with the large cover 2 of the pump body, so that the inlet and the outlet of the pump body are connected to balance the axial force of the rotor.
[0035] The tension-saving device in the present invention is to remove the main bolt 3 from the large cover 2 of the pump body.
[0036] The stretching and labor-saving device includes a sleeve 11 connected to the large cover 2 of the pump body and sleeved on the outside of t...
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