CN2423427Y

CN2423427Y - Self-balance beam-pumping unit

Info

Publication number: CN2423427Y
Application number: CN 00233805
Authority: CN
Inventors: 李华林
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-05-15
Filing date: 2000-05-15
Publication date: 2001-03-14
Anticipated expiration: 2010-05-15

Abstract

The utility model relates to a self-balance beam-pumping unit which is composed of a driving mechanism, a four-link mechanism, a back wheel, sheave wheels and a bracket, wherein the driving mechanism is movably connected to a balance bar, both ends of a first bar of the four-bar mechanism are respectively hinged on the bracket, and a crank which is hinged with an output shaft of a gearbox is used as a third bar. Both ends of the crank are respectively hinged with a second bar and a fourth bar positioned on a smooth bar, and a steel cable connected to the upper end of an oil pumping polish bar is fixed on the bracket around the two sheave wheels of the bracket and the back wheel of the balance bar. Counterweight, the balance beam of high center of gravity and the mule head of high center of gravity are omitted, and the driving mechanism as the counterweight is arranged on the swing balance bar, which causes the mechanism to be greatly light and handy and smoothly operate. Because of decreasing the center of gravity, the height of the bracket can be heightened to extend lifting stroke and increase oil production, and the manufacturing cost is lower.

Description

Self-balancing pumping unit

The utility model relates to a kind of self-balancing pumping unit, is mainly used in the usefulness of oil field oil recovery.

Prior art constructions is seen Fig. 2.By driving mechanism, connecting rod and oil pumping mechanism form, driving mechanism comprises motor 22, belt transmission secondary 23 and speed reducer 24, and connecting rod comprises crank 26 and connecting rod 28, and oil pumping mechanism comprises walking beam 29, support 30, horse head 32, wire rope 33 and sucker rod 19.The output shaft 25 of driving mechanism speed reducer drives crank 26 and rotates, and balancer weight 27 is arranged on the crank.Connecting rod 28 lower ends and crank are hinged, and upper end and walking beam 29 tail ends are hinged, and the walking beam middle part is articulated in the bearing pin 31 of support 30, and the walking beam front end has horse head 32.During use, driving mechanism drives crank and rotates around output shaft 25, drives the axis swing of walking beam around lock shaft 31 by connecting rod 28, and the wire rope 33 on the horse head drives sucker rod 19 with the crude oil extraction in the oil well.Its deficiency is: walking beam heaviness and center of gravity height cause whole weight of equipment heavy; Galloping perhaps, only under the situation that weight of equipment increases the weight of greatly, could be moved reposefully; The cost height; Can not adapt to vacuate oil and viscous crude.

The purpose of this utility model is to overcome above-mentioned deficiency of the prior art and provides that a kind of structure is light and handy, center of gravity is low and be applicable to the self-balancing pumping unit of taking out viscous crude, thin oil.

The purpose of this utility model can reach by following measure: the utility model is by driving mechanism, quadratic crank mechanism, tail wheel, head sheave and support are formed, driving mechanism is movably connected on the balancing pole, the first bar two ends of quadratic crank mechanism are articulated on the support respectively, the crank that is articulated in reduction gearbox output shaft is as the 3rd bar, the crank two ends are hinged second bar and the 4th bar respectively, the 4th bar is positioned on the balancing pole, the wire rope that oil pumping polish rod upper end connects is walked around two head sheaves on the support and the tail wheel on the balancing pole and is fixed on the support.

Second bar middle part of quadratic crank mechanism is connected with extension bar by union.

Reduction gearbox output shaft connects the balancing device.

The drawing of accompanying drawing is described as follows:

Fig. 1 is total figure of the present utility model.

Fig. 2 is total figure of prior art.

The utility model accompanying drawing piece number is represented:

1, polished rod 2, rope hanger 3, wire rope 4, head sheave

5, support 6, balancing pole 7, motor 8, driving belt

9, gearbox 10, balancing device 11, tail wheel 12, crank

13, union 14, fork

The accompanying drawing piece number of prior art is represented:

19, sucker rod 23, driving belt 24, speed reducer 25, output shaft

26, crank 27, balancer weight 28, connecting rod 29, walking beam

30, support 31, bearing pin 32, horse head 33, stay cord

The utility model is described in further detail below in conjunction with embodiment and accompanying drawing:

Fig. 1 represents structure of the present utility model, and mainly by driving mechanism, quadratic crank mechanism, tail wheel 11, head sheave 4 and support 5 are formed.Driving mechanism comprises motor 7, driving belt 8 and gearbox 9, and driving mechanism is installed on the balancing pole 6.Support is hinged with two head sheaves 4 on the top.Two immovable point ab bars of quadratic crank mechanism are as first bar, a, b are point articulated in two vertical rods of support, other three bars of quadratic crank mechanism are the second bar bc, the 3rd bar cd and the 4th bar da, bc forms by fork 14 with by the extension bar that union 13 is connected in the fork end, is beneficial to regulate the length of bc bar.The cd bar is a crank 12, and crank d end is articulated in the d point of balancing pole, and the d point is the axle center of reduction gearbox output shaft.The line that a point on the balancing pole is ordered to d is the ad bar.The balancing pole outer end is hinged with tail wheel 11.For the position of adjustment (promptly being presented as the reduction gearbox output shaft heart) in use, the balancing pole outer end is provided with balancing device 10, and the balancing device is inner and export axle center d and is connected.Polished rod 1 upper end of oil pumping usefulness is connected on the wire rope (or chain or belt) 3 by rope hanger 2, and wire rope is fixed in a top of the trellis after walking around two head sheaves and tail wheel.

During use, start the motor of driving mechanism on the balancing pole, crank 12 rotates around reduction gearbox output shaft heart d point, action by quadratic crank mechanism, order about tail wheel around a spot wobble, until putting to top dead center (drawing shown in the dotted line as Fig. 1 two point), the position of parts such as tail wheel shown in Fig. 1 solid line is a lower dead center.By the continuous swing of tail wheel between last lower dead center, constantly do elevating movement with the polished rod that drives oil pumping together with the oil well pump under it, crude oil is drawn up from the down-hole.

The utility model contrast prior art has following advantage:

Saved walking beam, the horse head of balance weight and high center of gravity, transmission mechanism has been arranged at the balance of swing as balance weight On the bar, make mechanism be able to greatly light and handy and smooth running; Since reduced center of gravity, but the heightening bracket height, to prolong Lifting travel and increase oil production; Cost is lower.

Claims

1, a kind of self-balancing pumping unit, it is characterized in that, by driving mechanism, quadratic crank mechanism, tail wheel, head sheave and support are formed, driving mechanism is movably connected on the balancing pole, the first bar two ends of quadratic crank mechanism are articulated on the support respectively, the crank that is articulated in reduction gearbox output shaft is as the 3rd bar, the crank two ends are hinged second bar and the 4th bar respectively, the 4th bar is positioned on the balancing pole, and the wire rope that oil pumping polish rod upper end connects is walked around two head sheaves on the support and the tail wheel on the balancing pole and is fixed on the support.

2, self-balancing pumping unit according to claim 1 is characterized in that, second bar middle part of quadratic crank mechanism is connected with extension bar by union.

3, self-balancing pumping unit according to claim 1 is characterized in that, reduction gearbox output shaft connects the balancing device.