Valve structure without valve rod and capable of resisting water hammer effect

Abstract

The invention discloses a valve structure without a valve rod and capable of resisting the water hammer effect and belongs to the field of valves.The valve structure comprises a valve body and end covers fixed to the two sides of the valve body, a valve element is arranged in the valve body, a plurality of overturning plates are evenly arranged between the valve element and the inner wall of the valve body at equal angles, and each overturning plate is of a fan-shaped structure; and a rotating shaft is fixed to the axis position of the overturning plate, bearing seats corresponding to the rotating shaft are arranged on the valve body and the valve element, eccentric wheels are fixed to one end of the rotating shaft, a rubidium magnetic ring is slidably connected into the valve body, pressing blocks corresponding to the eccentric wheels one to one are arranged on one side of the rubidium magnetic ring, and an electromagnet matched with the rubidium magnetic ring is fixed into the valve body. Buffering ends are symmetrically arranged on the two sides of the valve element, guide columns are fixed to one sides of the buffering ends, and sliding sleeves matched with the guide columns are arranged on the valve element. The valve-rod-free structural design is adopted, the service life is long, the water hammer effect can be effectively relieved, protectiveness is high, the market prospect is achieved, and the valve structure is suitable for popularization.

Description

technical field [0001] The invention relates to the field of valves, and more specifically relates to a valve structure without a valve stem anti-water hammer effect. Background technique [0002] When the forced sealing valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak. The force to close the valve is greater than the force to open the valve, so the diameter of the valve stem must be larger, otherwise the failure of the valve stem to bend will occur , since the emergence of self-sealing valves, the flow direction of the medium of the globe valve is changed from the top of the disc to the valve chamber. At this time, under the action of the medium pressure, the force to close the valve is small, but the force to open the valve is large, and the diameter of the valve stem can be Correspondingly, the existing globe valve will produce water shock when it is used. Water shock is also called water hammer. It is a phenomenon that ...

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Problems solved by technology

[0002] When the forced sealing valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak. The force to close the valve is greater than the force to open the valve, so the diameter of the valve stem must be larger, otherwise the failure of the valve stem to bend will occur , since the emergence of self-sealing valves, the flow direction of the medium of the globe valve is changed from the top of the disc to the valve chamber. At this time, under the action of the medium pressure, the force to close the valve is small, but the force to open the valve is large, and the diameter of the valve stem can be Correspondingly, the existing globe valve will produce water shock when it is used. Water shock is also called water hammer. It is a phenomenon that the pipe or container carrying its flow produces sound and vibration due to the sudden impact of water. It is produced when the working fluid is not flowing smoothly in the pipeline, resulting in loud noise and strong vibration, and even serious damage to the equipment

[0003] At present, the flow path of conventional valves is irregular, which leads to large fluid resistance and serious turbulent flow in the valve, and the adhesion between the covering rubber and the cock base is small, the friction between the valve body and the cock is large, and the sealing surface is worn out. serious leakage

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