High-pressure quick-opening ball valve

Abstract

The invention provides a high-pressure quick-opening ball valve. The high-pressure quick-opening ball valve comprises a valve body, a valve cover and an executing mechanism, wherein a connecting pipeline communicated with a medium inflow hole is connected to the valve cover, a first hydraulic electromagnetic valve is arranged in the connecting pipeline, a pressure relief branch is connected to the connecting pipeline, and a second hydraulic electromagnetic valve is arranged in the pressure relief branch; the first hydraulic electromagnetic valve is located on the upstream of the pressure relief branch, an outlet of the connecting pipeline is located at the left side of a valve seat, an outlet of the pressure relief branch is located in a valve cavity at the right side of the valve seat, the executing mechanism comprises a cylinder body and a piston, a pin shaft is fixed to a piston rod, a shifting fork is fixed to a rotating shaft, and the pin shaft moves in a fork opening of the shifting fork in a guiding manner; and a first ventilation opening and a second ventilation opening which are communicated with a cylinder body are formed in the two sides of the piston respectively, and before the valve is opened, ventilation is conducted on the first ventilation opening of the executing mechanism, and when the valve is opened, the first hydraulic electromagnetic valve is closed, the second hydraulic electromagnetic valve is opened, a medium enters a valve cavity in the right side of the valve seat through the pressure relief branch, and the executing mechanism drives the ball valve to be rapidly opened.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a high-pressure quick-opening ball valve. Background technique [0002] At present, the general switching time of emergency shut-off valves used in the petrochemical industry is: 3s~5s for small-diameter valves, and 8s-10s for large-diameter valves. It is almost impossible to achieve rapid shutdown in milliseconds. As the caliber and pressure of the ball valve increase, the switching torque and switching time of the ball valve also increase accordingly, and the selected actuators increase accordingly. It is difficult for the existing ball valve to meet the requirements of fast switching. [0003] In the gas explosion quick-opening valves in other industries, the medium is high-pressure gas, one end is connected to the high-pressure air source, and the other end is connected to the air. The high-pressure air source drives the piston to move quickly to achieve quick opening, but the...

AI Technical Summary

Problems solved by technology

As the caliber and pressure of the ball valve increase, the switching torque and switching time of the ball valve also increase accordingly, and the selected actuators increase accordingly. It is difficult for the existing ball valve to meet the requirements of fast switching.

[0003] In the gas explosion quick-opening valves in other industries, the medium is high-pressure gas, one end is connected to the high-pressure air source, and the other end is connected to the air. The high-pressure air source drives the piston to move quickly to achieve quick opening, but the pressure of the air source needs to be specially adjusted during use. , and the medium can only be high-pressure gas, the scope of application is small

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