Y-shaped stop-check valve

Abstract

The invention relates to the technical field of the valve body industry, in particular to a Y-shaped stop-check valve. The Y-shaped stop-check valve comprises a valve body, a valve seat, a valve rod and a valve clack. A valve cover is embedded in the valve body through a valve cover pre-tightening plate. The valve body is connected with a driving device sequentially through four stand columns and a stand column flange. The valve rod sequentially penetrates through the valve cover and the stand column flange and then is fixedly connected with the driving device. The valve rod is sequentially sleeved with a first packing pad, packing, a second packing pad, a packing bushing and a packing pressing plate from inside to outside. The packing and the two packing pads are both mounted in a packing box arranged on the valve cover. A segmental locating ring, a backing ring and a sealing ring are arranged between the valve body and the valve cover. The sealing ring is located between the backing ring and the segmental locating ring. When the Y-shaped stop-check valve is used, the sealing performance of the Y-shaped stop-check valve is good, and a sealing surface is free of friction loss and scratches; the Y-shaped stop-check valve is convenient and rapid to disassemble, assemble and maintain, small in operation torque and flexible in opening and closing, and has a high Cv value compared with similar products. The Y-shaped stop-check valve has the advantages of being simple in structure, reasonable in setting, low in manufacturing cost and the like.

Description

technical field [0001] The invention relates to the technical field of the valve body industry, in particular to a Y-shaped stop and check valve. Background technique [0002] A valve is a component that restricts the flow and pressure of fluid flowing in a pipe. According to different application purposes, it is divided into cut-off valves and regulating valves. Shut-off valves are used to cut off fluid flow, usually gate valves, globe valves, check valves, etc. [0003] Among them, the Y-shaped cut-off check valve is a relatively common valve in the check valve. It not only has the function of a stop valve, but also has the function of a check valve. In order to prevent the jamming of the valve disc during the movement of the usual Y-shaped stop check valve, a guide rib is set at the outlet of the flow channel where the middle cavity of the valve body matches the valve disc. The setting of this rib not only reduces the friction at the outlet. The area of ​​the flow chan...

AI Technical Summary

Problems solved by technology

In order to prevent the jamming of the valve disc during the movement of the usual Y-shaped stop check valve, a guide rib is set at the outlet of the flow channel where the middle cavity of the valve body matches the valve disc. The setting of this rib not only reduces the friction at the outlet. The area of ​​the flow channel is increased, and the resistance to the fluid is increased, which has a great impact on the Cv value of the valve.

During the opening process and after opening, the disc will rotate due to the impact of the medium, and this rotation will have a negative impact on the sealing and operation of the valve.

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