An integral valve seat nested flat gate valve

Abstract

The invention discloses an integral valve seat nested flat gate valve, and relates to the field of flat gate valves. The integral valve seat nested flat gate valve comprises a valve body, a valve seat sleeve, valve seats, a valve plate, a valve rod and a bracket flange cover, and is characterized in that the bracket flange cover (71) is arranged on the upper part of the valve body, and forms a first die cavity (10) with the valve body (1); the valve seat sleeve (2) is nested in the first die cavity (10); a second die cavity and a medium channel matched and communicated with a medium channel of the valve body are formed in the valve seat sleeve; a stepped cylindrical cavity is formed in the medium channel; the valve rod penetrates through a bracket component, and is connected with the valve plate; and the valve seats are arranged on the two sides of the plane of the valve plate in the cylindrical cavity respectively. In an ordinary flat gate valve, the valve body is required to be molded and formed due to the internal structure of the valve body, and is difficult to machine and poor in manufacturability. The problem is well solved by the invention, the valve body and the valve seat sleeve are convenient to machine, mount and maintain and high in manufacturability.

Description

technical field [0001] The invention relates to the field of flat gate valves, in particular to an integral valve seat nested small diameter flat gate valve. Background technique [0002] In the prior art, especially in oil production, water injection, chemical industry and other industries, small-bore slab gate valves are widely used, especially in high-pressure water distribution devices. Drilled and processed, it has a high-pressure cut-off valve, a filter sewage, a water meter, and a high-pressure regulating valve. Because the medium sometimes contains alkaline substances and high-pressure erosion and corrosion, the high-pressure globe valve is prone to leakage, which brings great difficulties to pipeline maintenance. Generally, the cut-off effect of flat gate valves is better than that of high-pressure globe valves. Due to the internal structure of the valve body, the valve body generally needs to be molded, and the high-pressure water distribution device is generally ...

AI Technical Summary

Problems solved by technology

Because the medium sometimes contains alkaline substances and high-pressure erosion and corrosion, the high-pressure globe valve is prone to leakage, which brings great difficulties to pipeline maintenance. Generally, the cut-off effect of flat gate valves is better than that of high-pressure globe valves. Due to the internal structure of the valve body, the valve body generally needs to be molded, and the high-pressure water distribution device is generally drilled in a square metal block, so it is difficult to use a flat gate valve in the high-pressure water distribution device.

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