Adjusting-type plug valve

Abstract

The invention relates to an adjusting-type plug valve which comprises a valve body, a valve rod, a valve core, a valve seat, a valve rod screw plug and a driving handwheel. An inlet runner and an outlet runner are arranged on the valve body, the valve core is fixedly connected at the bottom end of the valve rod, the valve seat is arranged below the valve core in a clingy manner, the valve rod screw plug is arranged on the valve rod in a sleeved manner, the driving handwheel is rotatably connected on the valve rod, each of the inlet runner and the outlet runner of the valve body is arranged obliquely, position of the inlet runner is lower than that of the outlet runner, an oblique through hole capable of being communicated with the inlet runner and the outlet runner is formed in the valve seat and obliques from the middle portion of one end away from the valve core to the outer side of one end close to the valve core, and section shape of the valve core is matched with one side, close to the valve core, of the oblique through hole in the valve seat. The adjusting-type plug valve is simpler in structure and higher in sealability, and has a better flow adjusting function.

Description

technical field [0001] The invention relates to a valve body, in particular to an adjustable plug valve. Background technique [0002] Among various types of valves, the plug valve is the most widely used one. The plug valve has the advantages of simple structure, quick opening and closing, convenient operation, and small fluid resistance. It is widely used in water conservancy projects in the process of oil and natural gas exploitation and on the transmission pipelines of oil, natural gas and refined oil. However, the existing plug valves generally can only realize the connection between the inlet flow path and the outlet flow path by directly rotating the valve core by 90 degrees, and the existing flow paths are usually straight-through flow paths so that they do not have the function of flow adjustment. Furthermore, in order to improve the sealing effect of the plug valve in the prior art, a valve seat is usually provided under the valve core, and a bushing is provided b...

AI Technical Summary

Problems solved by technology

However, the existing plug valves generally can only realize the connection between the inlet flow path and the outlet flow path by directly rotating the valve core by 90 degrees, and the existing flow paths are usually straight-through flow paths so that they do not have the function of flow adjustment. Furthermore, in order to improve the sealing effect of the plug valve in the prior art, a valve seat is usually provided under the valve core, and a bushing is provided between the inner wall of the valve body and the valve seat, between the valve seat and the valve core, etc. Sealing treatment, so not only the sealing structure is more complicated, the processing is difficult, the cost is high, the assembly and disassembly are more cumbersome, but also the sealing effect cannot be achieved

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