VALVE ASSEMBLY

摘要

The present invention includes a sensing device, a bonnet located below the sensing device, a piston with a through hole, and a valve stem connected with the sensing device, and a penetrating part through the through hole wherein the sensing device drives the valve stem to drive the piston; an auxiliary spring is arranged between the bonnet and the piston; the penetrating part is longer than the depth of the through hole; and the valve stem is slidably coupled in piston. The disclosed valve can prevent the valve stem from transferring the force of the main spring to the piston, so as to avoid damaging the valve port, the valve stem and the piston due to a reason that the force of the main spring is too large.

主权项

1. A valve assembly, comprising:
a sensing device; a piston with a center through hole; and a valve stem, wherein the upper end of the valve stem is connected with the sensing device, and the lower end is provided with a penetrating part which penetrates through the center through hole, so as to enable the valve stem to be connected with the piston; wherein the sensing device drives the valve stem to drive the piston to move up and down; and wherein an auxiliary spring which is always in a compressed state is arranged on the piston; the length of the penetrating part is greater than the depth of the center through hole; and the valve stem is slidably coupled in the center through hole of the piston.