Patent ID: 11867171
Assignee: YANTAI JEREH PETROLEUM EQUIPMENT & TECHNOLOGIES CO., LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 16:
17. The fluid end according to claim 11, further comprising a second valve assembly and a second guide portion, wherein the second valve assembly is located in the high-pressure chamber, and the second valve assembly is configured to communicate the pressure-alternating chamber with the high-pressure chamber upon being opened or configured to separate the pressure-alternating chamber from the high-pressure chamber upon being closed,
the second valve assembly comprises a second valve-body, a second seal, and a second valve seat; the second valve seat is annular and comprises a second intermediate hole, the second intermediate hole is configured to allow fluid to flow therethrough,
the second valve-body comprises a second main portion, and a third guide rod and a fourth guide rod which are arranged at two sides of the second main portion, respectively; a part of the second seal is embedded in a second groove of the second main portion,
the fluid end further comprises a second spring and a cover, the second spring is located between the cover and the second main portion,
the second guide portion comprises a second guide seat and a third guide sleeve connected with the second guide seat, the second guide seat comprises a second through hole, the second through hole is configured to allow fluid to flow therethrough, the third guide sleeve is configured to receive a part of the third guide rod so as to guide the second valve-body,
the cover has a fourth guide sleeve, and the fourth guide sleeve is configured to receive a part of the fourth guide rod so as to guide the second valve-body.