FIELD: oil and gas industry.
SUBSTANCE: device includes journal which comprises a pivot and a pin and is connected to pump suction valve, and a bush. Journal is equipped with tracking element rigidly installed thereon in the form of a cylindrical bowl, on the web of which, from the side opposite to suction valve, four protrusions similar to ratchet wheel teeth are provided. Front edge of each protrusion is located across journal axis. Rear edge is smoothly connected with lower end of the following front edge. Journal is made in the form of a cylindrical body changing into the form of confuser from valve's side. Two copying templets are rigidly installed inside cylindrical body on its inner surface in the form of semi-cylinders. Copying templets are located symmetrically with respect to each other in "X" letter shape, the side ends of which comprise the through longitudinal groove. A tab groove is provided on the upper edge of each copying templet in its middle part. Direction of ascending angle of protrusions and inclined surfaces of copying templets coincide.
EFFECT: operating reliability improvement.
8 dwg
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