Differential dynamic balance intercepting valve

Abstract

The invention relates to a differential dynamic balance intercepting valve. The intercepting valve comprises a valve body, a valve cover, a valve rod and a valve element, and is characterized in thatthe valve element is composed of a main valve element body and an auxiliary valve element body, the main valve element body is connected to the lower end of the valve rod, the bottom of the main valveelement body is sealed with a valve seat of the valve body, the auxiliary valve element body is arranged at the upper part of the main valve element body, and a sealing state is always kept between the auxiliary valve element body and the main valve element body; the auxiliary valve element body sleeves the valve rod, threads are arranged outside a sleeve on the upper portion of the auxiliary valve element body, and are meshed with inner threads on the valve cover, the valve rod and the valve cover are in trapezoidal threaded connection, and a path lead difference is arranged between the twosections of threads through the cooperation between the auxiliary valve element body and the valve cover as well as the cooperation between the valve rod and the valve cover; and a clutch is arrangedbelow the auxiliary valve element body, the clutch is arranged on the valve rod and rotates with the valve rod, upper meshing teeth of the clutch are arranged on the auxiliary valve element body, andthe auxiliary valve element body is enabled to be connected with or disconnected from the valve rod through the clutch. The differential dynamic balance intercepting valve has the advantages that thestructure is simple, the size is small, the weight is light, moreover, the torque during opening and closing of the valve is greatly reduced, the operation is facilitated, and the working efficiency is improved.

Description

technical field [0001] The patent of the present invention relates to a valve, in particular to a differential balance cut-off valve. Background technique [0002] At present, the general requirements for shut-off valves used in marine piping systems are: small size, light weight, small space occupation, small switching torque, convenient and quick operation, and high efficiency. The spool of the existing globe valve cooperates with the valve seat to achieve sealing. The spool needs to bear the pressure of the medium and the sealing reaction force at the same time, especially when it is applied under the working condition of high medium pressure, the torque when opening and closing the valve will be obvious. Increased, the operation efficiency is low and very laborious. In order to facilitate the opening and closing operation of the valve, the common solution is to install a deceleration mechanism in the valve system to reduce the switching torque, which will lead to an inc...

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Problems solved by technology

The spool of the existing globe valve cooperates with the valve seat to achieve sealing. The spool needs to bear the pressure of the medium and the sealing reaction force at the same time, especially when it is applied under the working condition of high medium pressure, the torque when opening and closing the valve will be obvious. Increased, low operating efficiency and laborious

In order to facilitate the opening and closing operation of the valve, the common solution is to install a deceleration mechanism in the valve system to reduce the switching torque, which will lead to an increase in the volume and weight of the valve, occupying a large space, increasing the switching operation time, and reducing the overall performance of the valve. , so it is difficult to meet the requirements of the modern ship piping system

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