A hydraulically controlled high-pressure sample transfer valve

By designing a hydraulically controlled high-pressure sample transfer valve, adopting a piston outer cylinder and piston rod combined structure and hand pump control, the safety hazard problem caused by the excessive internal and external pressure difference of the existing sample transfer valve is solved, and safe and reliable high-pressure sample transfer operation is achieved.

CN119617127BActive Publication Date: 2025-09-09PETROCHINA CO LTD
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Patent Information

Application Number
CN202311174553.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-09-12
Publication Date
2025-09-09
Estimated Expiration
2043-09-12

AI Technical Summary

Technical Problem

When the existing sample transfer valve transfers samples under high temperature and high pressure conditions, the valve top rod is subjected to excessive force due to the excessive pressure difference between the inside and outside, which makes it easy to be damaged and poses a safety hazard.

Method used

A hydraulically controlled high-pressure sample transfer valve was designed. It adopts a piston outer cylinder and piston rod combination structure. The piston is controlled downward by a hand pump to push the push rod to open the sampler valve. The design of a piston area to piston rod area ratio of 9:1 reduces the operating pressure, and the sealing O-ring and long wrench switch improve safety.

Benefits of technology

It realizes safe and reliable sample transfer operation under high pressure conditions, reduces the thread stress area and shear force, protects the operator's safety, and ensures the reliability and safety of the sample transfer valve.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention discloses a hydraulically controlled high-pressure sample transfer valve, belonging to the technical field of sample transfer control devices for high-pressure laboratory samples. The valve comprises a piston assembly and a sample transfer valve body; the piston assembly comprises a piston outer cylinder; one end of the sample transfer valve body is cooperatively connected to the piston outer cylinder, and the other end is provided with a first connecting thread for connecting to a sampler valve; a piston is provided within the piston outer cylinder, one end of the piston is connected to a piston rod, and the other end is connected to a piston travel rod; one end of the piston travel rod extends outside the piston outer cylinder; a hand pump pipeline interface is provided on the wall surface of the closed cavity formed by the piston outer cylinder and the piston; a needle valve assembly and a sample transfer high-pressure pipeline interface are provided on the sample transfer valve body, and the sample transfer high-pressure pipeline interface is used to connect to laboratory equipment or a high-pressure saline pump; the present invention can remotely control the piston of the sample transfer valve to switch operation by a hand pump, away from the sampler, and can well protect the safety of the operator.
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Citation Information

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