Horse head assembly for pumping unit

Abstract

The invention belongs to the technical field of petroleum field operation devices, and provides a horse head assembly for a pumping unit which is provided with a base, a supporting frame, a driving motor and a reduction gearbox are fixed to the base, the driving motor is connected with the reduction gearbox through a belt, an output shaft of the reduction gearbox is connected with a crank, a balance block is arranged on the crank, and a connecting rod is hinged to the crank. The connecting rod is hinged to one end of the walking beam, the walking beam is rotatably supported on the supporting frame, the horse head is fixed to the other end of the walking beam, the beam hanger is connected to the lower portion of the horse head, the walking beam is provided with a top plate, a bottom plate and two side plates, the side plates are symmetrically arranged between the top plate and the bottom plate, the side plates are welded to the top plate and the bottom plate respectively, and a connecting base is formed at one end of the walking beam. The connecting base is used for hinging a horse head. Compared with the prior art, the device has the following beneficial effects that when an oil well needs to be maintained, the horse head located above the oil well is rotationally moved away, and meanwhile the problem that in the prior art, the horse head deflects towards one side, and consequently a walking beam is twisted can be solved.

Description

technical field [0001] The invention belongs to the technical field of oilfield operation devices, and belongs to a tool for a pumping unit, in particular to a donkey head assembly for a pumping unit. Background technique [0002] Beam pumping unit is the type of pumping unit with the largest number of applications and the widest distribution in oil fields. The main structure includes: The donkey head of the oil machine is welded by steel plates, and is matched with the forearm of the beam through the donkey head pin. [0003] There are three ways of connecting the donkey head and the beam in the prior art: a rotating shaft type donkey head side turning mechanism, a dismountable donkey head side turning mechanism, and a donkey head side turning mechanism with three pin shafts. It can be seen from the above arrangement that in the prior art, the head of the donkey is biased to one side of the beam, so that the tension on one side of the beam is relatively large, which will d...

AI Technical Summary

Problems solved by technology

It can be seen from the above setting method that in the prior art, the head of the donkey is biased to one side of the beam, so that the side of the beam bears a larger tensile force, which will damage the connection stability between the head of the donkey and the beam, and the connection between the beam and the supporting frame.

[0004] Simultaneously in current prior art, steel wire rope all is fixedly connected with donkey head, is not convenient for the normal movement of steel wire rope

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