| 摘要 |
<p>The invention relates to a switching valve for liquid chromatography; the switching valve comprises a stator arranged in a housing and provided with a plurality of connecting ports and a rotary rotor arranged in the housing; the rotor mutually works with the stator in a regulated operation position limited by a corresponding angle position, so the fluid can connect with or disconnect from a preset connecting port; the rotor can support and bear a preset pressing force aiming at the stator in a rotary mode through a support pressing device arranged in the housing. The support pressing device is provided with a balance piece contacting with the rotor so as to transfer pressing force; the balance piece is provided with a head portion applying force to the rotor through a force application surface, a root portion on a pressing force generation unit or a pressing force transfer member of the support pressing device (by employing the root portion, the balance piece can be supported on the support pressing device), and a bending portion arranged between the head portion and the root portion; the bending portion allows elastic bending formation so that the force application surface of the head portion can conprehesively affect the rotor on each angle position of the rotor when the rotor is in vibration; pressure is uniformly distributed in a contact surface between the rotor and the stator.</p> |
