An operation and maintenance method for a double-shake, multi-gear, stably supported ball valve

Abstract

The invention provides an operation and maintenance method of a double-shake and multi-gear stable supporting ball valve. The operation and maintenance method comprises an operation method of the ballvalve, a multi-gear adjustment method and a mounting method of the ball valve. The ball valve comprises a left flange, a pre-tightening part, a spacer ring, a left pressing ring, a lower convex valveseat, an upper valve body, a shaft sleeve, a connecting plate, a right valve seat, a right pressing ring, a pressing plate flange, a lower spring, a left protruding part, a lower valve body, an outervalve rod, a lower valve shaft, a ball body, a first long rod, a first short rod, an upper connecting rod, a second long rod, a secondary shaft, a lower connecting rod, a second short rod, a secondary valve plate and an inner valve rod. The multi-gear adjustment method is as follows: a plurality of gears comprise a ball body full-open gear, a ball body full-closed gear, a temporary closing gear and a temporary adjustment gear; the temporary adjustment gear is driven by the inner valve rod and the inner valve rod is rotates to drive a corresponding transmission mechanism to fully close the secondary valve plate to form the temporary closing gear, so that the secondary valve plate is not completely closed to form the temporary adjustment gear.

Description

technical field [0001] The invention relates to the field of fluid control, in particular to an operation and maintenance method for a double-shake, multi-gear, stably-supported ball valve. Background technique [0002] The hydraulic cylinder execution system is a commonly used execution system, which controls the reciprocating motion of the hydraulic cylinder through the main hydraulic drive circuit and the hydraulic drive branch circuit for driving. Ball valves are common components among them. [0003] In actual use, the ball valves in the existing execution system have the following problems: [0004] 1. Ball valves in the prior art, especially large ball valves, are inflexible and bulky when closing, and are likely to cause strong water hammer, and multiple opening and closing have an impact on the service life of related accessories. [0005] 2. Ball valves in the prior art, especially large ball valves, are difficult to realize flexible gear adjustment and have sing...

AI Technical Summary

Problems solved by technology

[0004] 1. Ball valves in the prior art, especially large ball valves, are inflexible and bulky when closing, and are likely to cause strong water hammer. Multiple opening and closing have an impact on the service life of related accessories

[0005] 2. Ball valves in the prior art, especially large ball valves, are difficult to achieve flexible gear adjustment and have a single function

[0006] 3. Ball valves in the prior art, especially large ball valves, contain too many parts and are not compact in structure. For this, a small amount of prior art provides a compensation and preloading scheme for the spring valve seat, but this scheme leads to more and more parts. Miscellaneous, in case of spring failure, it will cause the entire valve seat system to fail, resulting in an accident

[0007] 4. The ball valve in the prior art uses an integrated valve seat, which has a single function, poor fault tolerance and inclusiveness, and becomes invalid after wear and tear

[0008] 5. A small amount of pressure rings are used in the ball valves of the prior art to adjust the pre-tightening of the valve seat. However, due to the large number of parts, and the pressure ring is pressed by the pressure plate, the pressure ring is pressed against the seat, and the stability of the compression link is poor.

[0009] 6. The ball valves in the prior art have adjustment and preload compensation in the horizontal direction, but lack vertical adjustment and preload compensation.

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