Fixing structure for lifting rope of beam-pumping unit

Abstract

A fixing structure for a lifting rope of a beam-pumping unit comprises a horse head and a beam, wherein the beam is connected with the horse head, a transition guide support is arranged at the top of the horse head, a rope hanging device is mounted on the beam through an auxiliary supporting seat, and a rope inlet and a rope outlet of the rope hanging device face the transition guide support; the transition guide support comprises side plates mounted on two sides of the top of the horse head respectively, a cambered guide bottom plate is mounted between the two side plates, limit blocks are mounted on the cambered guide bottom plate, limit grooves are defined by the limit blocks, the cambered guide bottom plate and the corresponding side plates, a limit pressure plate is arranged on the limit blocks, and a reinforcing supporting plate is arranged between the bottom surface of the cambered guide bottom plate and a corresponding position on the horse head; the auxiliary supporting seat comprises a supporting seat body and a reinforcing plate, the lower part of the supporting seat body is mounted on the beam through the reinforcing plate, an inclined mounting plane is arranged at the upper part of the supporting seat body, and the rope hanging device is mounted on the inclined mounting plane; one end of the lifting rope penetrates one limit groove, then goes into the rope inlet of the rope hanging device and goes out of the rope outlet of the rope hanging device and finally back penetrates the other limit groove. The fixing structure is applicable to the beam-pumping unit.

Description

technical field [0001] The invention relates to a suspension rope fixing structure of an oil pumping unit, in particular to a suspension rope fixing structure of a beam pumping unit. Background technique [0002] At present, the beam pumping unit is the type of pumping unit with the largest number of applications and the widest distribution. This kind of beam pumping unit generally includes a bracket, a beam, a driving mechanism, a donkey head and a suspension rope. The middle part of the beam is hinged on the bracket, one end of the beam is connected to the driving mechanism, and the other end of the beam is connected to the vertical The middle part of the donkey's head is connected, the donkey's head and the beam are connected and fixed by the donkey's head pin, and the sling is arranged on the top of the donkey's head through a rope hanger. The beam pumping unit with this structure has the following problems in actual use: [0003] 1. Since the sling is directly placed ...

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Problems solved by technology

[0003] 1. Since the sling is directly placed on the top of the donkey's head, the pulling force on the sling is all borne by the donkey's head, and the middle part of the donkey's head is provided with a notch for connecting the beam. In this way, after a period of use, the donkey's head will It is very easy to produce cracks, which poses a safety hazard; at the same time, due to the high position of the donkey's head, it is difficult for the staff to find small cracks on the donkey's head during daily inspections. Generally, when they are found, the cracks have expanded to a very serious level. There may even be serious accidents in which the donkey head falls from a height to the ground;

[0004] 2. Since the pulling force on the sling is all borne by the donkey head, the donkey head tends to move relative to the beam. In this way, after a period of use, the donkey head pin is easy to wear and loose in the pin hole, and then abnormal ring

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