Anti-eccentricity check valve for underground oil pipe

The invention relates to the technical field of oil well pipeline equipment, and particularly relates to an anti-eccentricity check valve for an underground oil pipe. The anti-eccentricity check valveis symmetrical in structure, and the problem that a spring is damaged due to uneven stress and fluid impact can be avoided; the sealing performance of the check valve is remarkably improved through double sealing of a movable sleeve and a non-return plate; accurate resetting can be achieved through cooperation of an overflowing barrel and the movable sleeve, the practical significance and the popularization value are achieved, and good economic benefits can be expected to be generated. The anti-eccentricity check valve comprises a tubular body, the overflowing barrel, the movable sleeve, thenon-return plate and the spring; threads are formed in the two ends of the body; and a first flow limiting plate, a second flow limiting plate and a mounting seat are sequentially arranged on the inner wall of the body. 本发明涉及油