Valve core assembly and valve adopting the valve core assembly

摘要

A valve core assembly and a valve adopting the valve core assembly. The valve core assembly comprises a valve core (4) and a transmission member (7) having a common axis, and a sliding ejector pin (6) arranged along an axis perpendicular to the common axis. The valve core assembly is disposed inside a valve body (1) and is rotatable about the common axis upon engaging with the valve body (1). The valve core (4) has one concave portion, and the transmission member (7) is at least partially placed inside the concave portion. A radial inwardly-convex profile (9) is formed at the circumferential wall inside the concave portion, the transmission member (7) is formed with a radial outwardly-convex profile (72), and when a valve rod (2) drives the sliding ejector pin (6) and the transmission member (7) to rotate, the radial inwardly-convex profile (9) in the concave portion of the valve core (4) engages with the sliding ejector pin (6) and the radial outwardly-convex profile (72) of the transmission member (7) to switch the valve core among an open state, a pre-closed state and a fully-closed state. The valve core assembly has a simple structure and a high space utilization, so as to minimize the size of the valve, and the opening torque is small and the sealing performance is desirable.

主权项

1. A valve core assembly disposed in a valve body and being rotatable about a common axis upon engaging with the valve body, comprises a valve core, a valve rod and a transmission member having the common axis, wherein: further comprises a sliding ejector pin arranged along an axis perpendicular to the common axis;
the valve core has one concave portion; the transmission member is combined with the valve rod at the end of the valve rod and is able to rotate along with the valve rod; the transmission member is at least partially placed inside the concave portion; a radial inwardly-convex profile is formed at a circumferential wall inside the concave portion; the transmission member is formed with a radial outwardly-convex profile; a valve rod cavity is provided radially on the end of the valve rod for accommodating the sliding ejector pin; an inwardly-convex profile is provided on the valve body for surrounding the valve rod; when rotating the valve rod, the inwardly-convex profile of the valve body abuts against the sliding ejector pin and drives the sliding ejector pin to move radially in the valve rod cavity; when the sliding ejector pin in the valve rod moves radially until the inwardly-convex profile of the valve body driving the sliding ejector pin to disengage with the valve core, the radial outwardly-convex profile of the transmission member at the end of the valve rod engages with the radial inwardly-convex profile of the concave portion of the valve core, such that the rotation of the transmission member around the common axis is converted into a radial movement which causes the valve core to press against the valve seat of the valve body.