Self-sealing globe valve

Abstract

The invention discloses a self-sealing stop valve which comprises a valve body. A liquid inlet cavity and a liquid outlet cavity are formed in the valve body, a partition plate is arranged in the valve body and is provided with a communicating hole enabling the liquid inlet cavity and the liquid outlet cavity to be communicated, a valve cover is connected to the valve body, a valve shaft is connected to the valve cover in a threaded mode and extends into the liquid outlet cavity, the end of the valve shaft is connected with the valve plate, the outer surface of the valve plate is coated with an elastic sealing layer, the elastic sealing layer on the valve plate sealing end face is matched with the end face of the communicating hole in a contact mode, and then an axial sealing pair for achieving axial sealing can be formed. The elastic sealing layer on the valve plate sealing end face is matched with the hole wall of the communicating hole in a contact mode, and then a radial sealing pair for achieving a radial self-sealing effect can be formed. The stop valve is simple in structure, has the dual effects of axial sealing and radial sealing, does not need a larger pressure during closing and does not cause seepage or leakage.

Description

technical field [0001] The invention relates to a self-sealing stop valve. Background technique [0002] At present, the known stop valve includes a valve body, including a valve body, a liquid inlet chamber and a liquid outlet chamber are arranged in the valve body, a partition is arranged in the valve body, and a communication hole connecting the liquid inlet chamber and the liquid outlet chamber is arranged on the partition board. , the valve body is connected with a valve cover, the valve cover is connected with a valve shaft, the valve shaft extends into the liquid outlet chamber and its end is connected with a valve plate, and the outer surface of the valve plate is covered with an elastic sealing layer. The sealing principle is to rotate the valve shaft so that the sealing end face of the valve plate seals the communication hole, and the elastic sealing layer on the sealing end face is deformed under pressure by the fluid pressure and the self-weight of the valve plat...

AI Technical Summary

Problems solved by technology

The disadvantage of the stop valve with the above structure is that when the fluid pressure is high, the closing torque of the valve is relatively large, the elastic sealing layer is under severe pressure, and the service life of the valve plate is short.

Images