a safety valve

Abstract

The invention belongs to the technical field of industrial valves. The invention discloses a safety valve, which comprises a main valve body, a main valve core, a connecting plate and a pilot valve; one end of the main valve core is connected to the connecting plate, and the other end is in flat contact with the plane where the main passage is located, and the pilot valve convects The flow control of the working oil to the connection plate and the rotation drive of the main valve core, so as to control the rotation direction of the main valve core relative to the connection plate, and then control the on-off control of the main valve core to the main channel, to realize the horizontal direction The opening and closing control of the main channel between the oil inlet and the oil outlet. The safety valve of the present invention can not only avoid the jamming of the main valve core due to the concentricity, ensure the smooth progress of the overflow action, but also improve the protection of the sealing surface and reduce the impact of opening and closing, and improve the service life and safety of the entire safety valve. job stability.

Description

technical field [0001] The invention belongs to the technical field of industrial valves, and in particular relates to a safety valve. Background technique [0002] Pilot-operated safety valve is the best overpressure protection device for pressurized equipment, containers or pipelines, and is mainly used in petroleum, chemical, electric power, metallurgy and other fields. However, during the process of processing and assembling the safety valve, its subsequent actual use performance will be affected due to various reasons. [0003] At present, in conventional pilot-operated safety valves, the opening and closing action of the safety valve is realized by the relative axial movement between the main valve core and the main valve seat on the same axis. However, in the process of processing and assembly, due to the accumulation of errors, sometimes the concentricity of the main valve core and the main valve seat will deviate, resulting in insensitivity of the main valve moveme...

AI Technical Summary

Problems solved by technology

However, in the process of processing and assembly, due to the accumulation of errors, sometimes the concentricity of the main valve core and the main valve seat will deviate, resulting in insensitivity of the main valve movement, and thus the safety valve cannot be opened smoothly under the rated pressure

In addition, when the main spool is opened, there will be impurities attached to the sealing surface of the main spool, and the presence of impurities will lead to poor sealing of the main spool when it is closed, and will affect the sealing of the main spool and the main valve seat. In addition, the main valve core will collide with the sealing surface of the main valve seat when it is opened and closed, which will further damage the sealing surface of the main valve core and the main valve seat and affect the service life.

In addition, when the traditional pilot-operated safety valve is working, the opening and closing action of the main valve is usually relatively rapid, resulting in a large pressure shock, which will bring a great burden to the system where it is located and cause system losses. Affect the service life of the system

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