Novel adjustable sealing ball valve with high pressure releasing function

Abstract

The invention relates to a novel adjustable sealing ball valve with a high pressure releasing function. The novel adjustable sealing ball valve with the high pressure releasing function comprises a valve body, a ball body, a valve seat and a valve rod driving the ball body to rotate. The valve seat can slide relative to the valve seat and is arranged inside the cavity of the valve body which is communicated with an inlet flow channel and an outlet flow channel; the upper ring of the valve body is provided with a sealing ring capable of plugging the communicating portion of the internal flow channel of the ball body and the cavity of the valve body, the ring-shaped outer walls of the valve seat portions of the inlet flow channel and the outlet flow channel are rotatably connected with the valve body in a matched mode, and parts of the outer walls are connected in a sealed mode with the valve body through ring-shaped sealing modules; each ring-shaped sealing module is composed of at least one one-way sealing ring, and the slots of at least one one-way sealing ring on the valve seat are in the same direction and back to the ball body. By means of the one-way sealing rings arranged between the valve seat and the valve body, the novel adjustable sealing ball valve achieves the pressure releasing function, thereby solving the problem of damage due to high pressure inside the valve body and prolonging the service life, and meanwhile, by means of a worm and gear driving mechanism, achieves an sealing adjustable function.

Description

technical field [0001] The invention relates to a ball valve, in particular to a novel sealing adjustable ball valve with a high-pressure release function. Background technique [0002] As a globe valve to control the pipeline, the ball valve has a wide range of applications, and there are different requirements for the function of the ball valve in different technical fields. In the transmission process of liquefied petroleum gas or gas, the liquefied gas is very easy to vaporize. For example, when the ball valve blocks the flow channel of the medium, some medium will remain in the channel inside the ball valve and enter the valve body. In the cavity, if the residual medium vaporizes, a high internal pressure will be generated in the valve body. If the pressure is not released in time, it may cause damage to the valve body of the ball valve, and may even cause a safety accident, such as , The volume of liquefied natural gas (LNG) expands to 600 times after gasification. If...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: First, it is difficult to adjust evenly, because multiple adjustment points are arranged on the circumference, each adjustment point is adjusted separately, it is difficult to adjust them all in a consistent manner, and if there is any inconsistency, it will cause Uneven force distribution on the valve seat causes partial leakage

Secondly, the adjustment ability is limited, limited to the size of the valve body and the cone surface, the adjustment amount in the axial direction of the valve is very limited, and it cannot be continuously adjusted

Again, opening multiple holes will reduce the strength of the valve body

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