Ultrahigh-pressure union type plug valve

Abstract

The invention relates to the technical field of plug valves, and discloses an ultrahigh-pressure union type plug valve. The ultrahigh-pressure union type plug valve comprises a valve body, an inlet pipe and an outlet pipe are arranged at the left end and the right end of the valve body and communicate with the valve body, connecting pipes are arranged at the ends, away from each other, of the inlet pipe and the outlet pipe correspondingly, unions are arranged on that out surfaces of the contact parts of the two connecting pipes with the inlet pipe and the outlet pipe correspondingly, and a cover plate is arranged on the top of the valve body. When a valve plug rotates, a medium in a communicating groove is blocked by a baffle, the baffle is erected under blocking of a clamping block, the medium can be effectively prevented from flowing back to the interior of the inlet pipe through the communicating groove, so that backflow is reduced; and through the arrangement of the connecting plate and the special design that the front portions of the water through holes in the connecting plate are wide and the rear portions of the water through holes in the connecting plate are narrow, the flow speed of the medium can be increased when the medium normally flows, and the situation of backflow of the medium can be effectively reduced through the decreased hole diameter.

Description

technical field [0001] The invention relates to the technical field of plug valves, in particular to an ultra-high pressure union type plug valve. Background technique [0002] The plug valve is a closing member or a plunger-shaped rotary valve. By rotating 90 degrees, the channel port on the valve plug is the same as or separated from the channel port on the valve body to realize opening or closing. The shape of the valve plug of the plug valve can be cylindrical or conical. In cylindrical plugs, the passages are generally rectangular, while in tapered plugs, the passages are trapezoidal. [0003] Most of the plug valves in the prior art have no non-return function when used. Under the ultra-high pressure environment, the medium inside the plug valve is prone to backflow, which makes the plug valve unsuitable for some occasions to prevent the reverse flow of the medium. Therefore, we propose a super High pressure union plug valve. Contents of the invention [0004] (1)...

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Problems solved by technology

[0003] Most of the plug valves in the prior art do not have a check function when used. Under the ultra-high pressure environment, the medium inside the plug valve is prone to backflow, which makes the plug valve unsuitable for some occasions to prevent the reverse flow of the medium. Therefore, we propose a super High pressure union plug valve

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