A pressure detection method for a ball valve

Abstract

The invention discloses an under-pressure detection method of a ball valve, and belongs to the technical field of valves. The under-pressure detection method of the ball valve includes steps: drawing a first pressure curve diagram of the turn-on state of the ball valve; drawing a second pressure curve diagram of the turn-off process; drawing a third pressure curve diagram of the turn-off state; drawing a preset curve diagram A, a curve diagram B, and a curve diagram C according to various states, and inputting the curve diagrams into an MCU; detecting; and emitting alarm signals to an alarm module. According to the under-pressure detection method of the ball valve, the technical problem of poor sealing effect due to line sealing between a valve core and a valve seat in the conventional ball valve is solved; the technical problem of detection of inner leakage of the ball valve in the usage process of the ball valve is also solved; and on-line monitoring of the damage and leakage of the sealing surface of the valve core and the valve seat of the ball valve can be realized without stopping medium transmission and without taking the valve down from a pipeline.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a ball valve with pressure detection. Background technique [0002] As a kind of valve, the ball valve has been widely used to connect or cut off the conveying medium in the pipeline. Since the medium conveyed in the pipeline is usually gas or liquid, the sealing performance of the ball valve is required to be high, especially when the ball valve is used. There is no external leakage and internal leakage, and the external leakage of the valve stem and each joint can be easily detected from the outside of the valve. However, when the valve is in a closed state, whether there is an internal leakage problem cannot be effectively detected at present. At the same time, the frequent switching of the valve, the sealing pair of the sealing surface of the valve ball and the sealing surface of the valve seat is easy to wear and cause leakage. When the leakage is serious, the valve seat sho...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a pressure detection method for a ball valve in view of the above-mentioned problems, and to solve the problem between the valve core and the valve seat in the traditional ball valve. Line seal, the technical problem of poor sealing effect, through the arrangement of the ring groove to increase the sealing contact between the valve core and the valve seat, so as to effectively form the sealing surface and ensure the sealing effect

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