| 摘要 |
<p>A pressure control valve includes: a tubular valve body, which has a bottom wall and side walls, wherein the bottom wall includes thereon an intake (4A) connected with a device, the pressure of which is to be limited, and there is at least one guide pin (21) on the side walls, and the tubular valve body has a vent connected to an exhaust system; a valve core (2), which is set in the tubular valve body and cooperates with the intake (4A) in a sealed manner; a travel guide bar (16), the lower end of which is connected with the valve core (2); a sleeve, which can be sleeved outside the tubular valve body in a rotating or up-and-down moving manner, so as to drive the travel guide bar (16) to rotate or move up and down; a spiral guide (18), which can be sleeved on the travel guide bar (16) in an up-and-down moving manner, wherein spiral grooves used for inserting at least one guide pin (21) are provided on the outside surface of the spiral guide (18); a pressure spring (22), one end of which is pressed tightly on the valve core (2), and the other end of which is pressed on the spiral guide (18).</p> |
