Donkey head connection device for pumping unit

Abstract

The invention provides a donkey head connection device for a pumping unit, which is used to connect the first connection plate and the second connection plate stacked sequentially from top to bottom. The donkey head connection device of the pumping unit includes: a connection pin and a pin pulling mechanism , wherein the connecting pin includes a pin body and an end cap connected to one end of the pin body, a dismounting threaded hole is provided in the center of the end cap along the axial direction of the pin body, the pin body runs through the first connecting plate and the second connecting plate, and the end The cap is lapped on the first connecting plate; the pin pulling mechanism includes a screw and a bracket fixed above the connecting pin, one end of the screw goes through the bracket and is screwed into the threaded hole for disassembly, and the other end of the screw extends out of the bracket and is screwed with a nut , the bottom surface of the nut leans against the bracket, and through the cooperative movement of the screw and the nut, the driving screw moves along the axial direction of the pin body and drives the pin body to separate from the first connecting plate and the second connecting plate. The donkey head connecting device of the pumping unit provided by the present invention makes the dismounting operation of the connecting pin simple and convenient, and saves time and effort.

Description

technical field [0001] The invention relates to the technical field of oil exploitation, in particular to a donkey head connection device for an oil pumping unit. Background technique [0002] The donkey head of the existing pumping unit is usually provided with two groups of donkey head connecting plates symmetrically on both sides, and the beam connecting plate corresponding to the two groups of donkey head connecting plates is usually arranged on the beam of the pumping unit. A donkey head connecting plate is connected with the corresponding beam connecting plate through pins. During operation, the same side pin can be removed to make the donkey head turn sideways so as to prevent the donkey head from affecting the wellhead maintenance work. However, the existing When the pin is taken out, it is time-consuming and labor-intensive to hit the bottom with a sledgehammer. At the same time, due to the increasing load of the oil well, the pumping unit vibrates, causing the wear...

AI Technical Summary

Problems solved by technology

[0002] The donkey head of the existing pumping unit is usually provided with two groups of donkey head connecting plates symmetrically on both sides, and the beam connecting plate corresponding to the two groups of donkey head connecting plates is usually arranged on the beam of the pumping unit. A donkey head connecting plate is connected with the corresponding beam connecting plate through pins. During operation, the same side pin can be removed to make the donkey head turn sideways so as to prevent the donkey head from affecting the wellhead maintenance work. However, the existing When the pin is taken out, it is time-consuming and labor-intensive to hit the bottom with a sledgehammer. At the same time, due to the increasing load of the oil well, the pumping unit vibrates, causing the wear of the pin hole and the phenomenon that the pin hole becomes larger. The structure is extremely simple and easy to loosen. When it is loosened, it will cause the donkey head of the pumping unit to shake up and down, causing problems such as cracking at the connection and loud noises.

The existence of the above unsafe factors not only greatly affects the oil recovery efficiency of oil wells, but also brings great difficulties to the safe and environmentally friendly production of oil fields.

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