Plug valve

Abstract

According to the key points of the technical scheme, the plug valve comprises a valve body with a cavity, the cavity penetrates through the two sides of the valve body, the plug valve further comprises a valve element rotationally arranged in the valve body, and the valve body is provided with a first mounting channel and a second mounting channel; the valve core penetrates through the first mounting channel and is arranged in the cavity; the valve body is further provided with a first sealing part and a second sealing part. The first sealing part is matched with the first mounting channel to seal the upper end of the valve core; the second sealing part is matched with the second mounting channel to seal the lower end of the valve core; the upper end of the valve element penetrates through the first sealing part and rotates relative to the valve body under the action of external force, and a limiting part is arranged on the second sealing part. The limiting part abuts against the valve element to limit and fix the valve element. The sealing device has the beneficial effects that machining is convenient, damage caused in the assembling, machining and transporting processes is avoided, and multi-section sealing is achieved.

Description

technical field [0001] The present invention relates to the field of valves, more specifically it relates to a 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 communicates with or separates from the channel port on the valve body to realize opening or closing. The shape of its valve plug It can be cylindrical or conical. In the cylindrical valve plug, the channel is generally rectangular; in the conical valve plug, the channel is trapezoidal. These shapes make the structure of the plug valve light and suitable for cutting and connecting. It is suitable for passing medium and splitting, but it can also be used for throttling sometimes according to the applicable properties and the erosion resistance of the sealing surface; during the production, assembly and transportation of plug valves, due to the shaking during transportation, the torque during assembly...

AI Technical Summary

Problems solved by technology

[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 communicates with or separates from the channel port on the valve body to realize opening or closing. The shape of its valve plug It can be cylindrical or conical. In the cylindrical valve plug, the channel is generally rectangular; in the conical valve plug, the channel is trapezoidal. These shapes make the structure of the plug valve light and suitable for cutting and connecting. It is suitable for passing medium and splitting, but it can also be used for throttling sometimes according to the applicable properties and the erosion resistance of the sealing surface; during the production, assembly and transportation of plug valves, due to the shaking during transportation, the torque during assembly If it is too large, the rotation angle of the valve core relative to the valve body is too large, resulting in the loosening of the plug valve and liquid leakage, which is not conducive to the long-term use of the product and the service life is short

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