Upper-mounting-type hydraulic ball valve

Abstract

The invention relates to an upper-mounting-type hydraulic ball valve which comprises an upper valve rod, a valve cover, a valve body, a lower valve rod and a valve seat assembly; the valve seat assembly is installed between the valve body and a central ball valve body; two sides of the valve body are respectively provided with the upper valve rod and the lower valve rod; the valve cover is installed at the part of the lower side of the upper valve rod; the clearance parts of the valve seat assembly, and the upper side and the lower side of an outer valve body are respectively provided with a grease injection hole II and a grease injection hole I; and one side of the grease injection hole II is provided with a screw plug hole. The invention has the beneficial effects that a hydraulic piston motion principle is adopted, the ball valve has a stable structure, the hazard of valve body leakage is avoided, the dismounting issue of the upper-mounting-type ball valve can be solved thoroughly with the minimum difficult, and the on-line maintaining requirement is realized; and the simple batch production of valves with large and small calibers and high and low pressure can be realized, the existing similar products can be replaced completely, and the ball valve has wide market potentiality.

Description

technical field [0001] The invention relates to a top loading hydraulic ball valve. Background technique [0002] The existing ordinary casting two-piece and three-piece ball valves are widely used. For example, the compressed seat spring type has a simple structure, but it is basically impossible to disassemble online without special tools; the ball of the V-shaped ball valve is difficult to process, takes a long time to assemble and debug, and has unstable performance; The V-shaped valve stem spring type has a certain pre-tightening effect, the ball is difficult to process, and the performance is still poor; the single-seat threaded ball valve can adjust the pre-tightening force, which is only suitable for small-diameter low-pressure ball valves; the double-seat threaded spring type The thread is easy to be blocked by medium and dirt, and the single seat thread spring type has a certain saving in materials, but it is only suitable for small and medium diameter valves. Co...

AI Technical Summary

Problems solved by technology

[0002] The existing ordinary casting two-piece and three-piece ball valves are widely used. For example, the compressed seat spring type has a simple structure, but it is basically impossible to disassemble online without special tools; the ball of the V-shaped ball valve is difficult to process, takes a long time to assemble and debug, and has unstable performance; The V-shaped valve stem spring type has a certain pre-tightening effect, the ball is difficult to process, and the performance is still poor; the single-seat threaded ball valve can adjust the pre-tightening force, which is only suitable for small-diameter low-pressure ball valves; the double-seat threaded spring type The thread is easy to be blocked by medium and dirt, and the single-seat thread spring type has a certain saving in materials, but it is only suitable for small and medium-sized valves

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