Safe and reliable derrick lifting multi-stage cylinder
A multi-stage cylinder, reliable technology, applied in the direction of fluid pressure actuators, etc., to achieve the effect of smooth operation, stable operation and reduced load
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[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0029] see Figure 1 to Figure 4 , the embodiment of the present invention includes:
[0030] A safe and reliable derrick lifting multi-stage cylinder, comprising: a cylinder body 1, a first-stage piston rod 2, a second-stage piston rod 3 and a third-stage piston rod 4 arranged sequentially from outside to inside, the rear end of the first-stage piston rod 2 There is a first limit nut 22 at the end, and a second limit nut 23 is provided at the rear end of the secondary piston rod 3, and a rear end cover 5 is fixed a...
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