Successive reciprocating formula beam -pumping unit

The utility model relates to a successive reciprocating formula beam -pumping unit, its technical scheme is: be equipped with the support frame on the base, the middle part of walking beam is connected to the support frame, and the front end of walking beam is equipped with the horse head, and the rear portion of walking beam is equipped with the counter weight, the reciprocal operating system of rear end sub -unit connection of walking beam, reciprocal operating system include cylinder body, lifter, spring, the inside lifter that is equipped with of cylinder body, the connection of after section of lifter and walking beam, the inside hydraulic pressure chamber that is equipped with of cylinder body, the hydraulic pressure chamber on be equipped with the feed liquor hole and go out the liquid hole, feed liquor hole site in a liquid hole lower part, the hydraulic pressure chamber on the play liquid check valve of feed liquor jogged joint hydraulic pump, the hydraulic pressure chamber on the feed liquor check valve of play liquid jogged joint hydraulic pump, hydraulic pump connection cam, cam pass through the motor and drive and rotate, the beneficial effects are that: simple structure, convenient to use has effectively reduced manufacturing cost, has effectively improved the work efficiency of beam -pumping unit, has alleviateed the heavy burden of beam -pumping unit, has improved the output in oil field.