CN2042881U - Wheel axle distance incresement type pumping unit - Google Patents

Abstract

The utility model is characterized in that the upper part of a pumping unit is coaxially provided with a hanging weight wheel and a rope pulley, and the diameter of the hanging weight wheel is larger than the diameter of the rope pulley. When the hanging weight wheel and the rope pulley turn the same angle, the distance passed by a hanging weight rope on the hanging weight wheel is larger than the distance passed by a steel cable on the rope pulley, the effect of the distance increase can be achieved. The utility model has the advantages of simple structure, light weight, small dynamic load, long service lift of wearing parts, and large stroke regulating scope, and the pumping unit is a pumping unit with long stroke and energy-saving effect.

Description

Wheel axle distance incresement type pumping unit

The utility model is a kind of improvement of pitch increased type long stroke pumping unit, and it mainly adopts the structure of wheel shaft to carry out increment, so the utility model relates generally to the reciprocator and the corresponding relevant annex of oil pumper.

In the technical field of pitch increased type long stroke pumping unit, with the maximally related prior art of the utility model be the pitch increased type long stroke pumping unit, this oil pumper has obtained Chinese patent and United States Patent (USP).The increment mode of this oil pumper is to adopt an increment scooter to carry out increment, wears around wire rope in this increment scooter with needing repeated multiple times, and the increased frequency of wire rope bending reduces the life-span of steel wire greatly.In its structure, the multiple of increment is directly proportional with the quantity of increment scooter middle pulley, and consequently stroke is big more, and the life-span of wire rope is low more, because oil pumper is the long-term equipment of operation continuously, the reduction of rope service-life brings certain difficulty must for applying of this oil pumper.In addition, this oil pumper is because by increment assembly pulley increment, pulley is paid too much, has eight at least, and is a lot of in the loss of these local efficient, also do not meet requirements of saving energy.Simultaneously also there is other problem in this oil pumper, part is many as making, weight greatly, pressure is big between the guide wheel on track and the counterweight car, makes track easy deformation and wearing and tearing etc.In order to solve the problem that the increment oil pumper structurally exists, the utility model has been done improvement to this oil pumper, its objective is provide a kind of simple in structure, in light weight, dynamic load is little, the consumable accessory life-span is long, and be convenient to change, cost is low, the energy saving long stroke pumping unit that the stroke adjustment scope is big.

Solution of the present utility model is: adopt the diameter between two wheels to realize increment than the reciprocating stroke that amplifies slide block.Coaxial suspending weight wheel and the rope sheave of being installed with above the utility model mid frame, the diameter of suspending weight wheel is greater than the diameter of rope sheave.Like this when reciprocator's driving rope sheave turns over certain angle, the suspending weight wheel also necessarily turns over so wide-angle, because the suspending weight wheel diameter is greater than the diameter of rope sheave, suspending weight rope on the suspending weight wheel is just necessarily than the last rope on the rope sheave or to transfer the distance that rope passes by long, the last rope on the rope sheave or to transfer the distance of walking of restricting promptly be the distance that slide block moves.The distance of being passed by by the moving sucker rod of the suspending weight rope band distance of just passing by greater than slide block like this, above structure has just reached the effect of increment, has realized the long stroke reciprocating motion of sucker rod.

Accompanying drawing 1 is a wheel shaft pitch increased type long stroke pumping unit overall structure schematic diagram.

Accompanying drawing 2 is to go up rope on the rope sheave and transfer the scheme of installation side by side of restricting.

Accompanying drawing 3 is steel cable fixing means schematic diagrames on the rope sheave.

Accompanying drawing 4 is adjustable type movable pulley structural representations.

Accompanying drawing 5 is that the positioning wheel is regulated well location and moving method schematic diagram.

Do to describe in detail below in conjunction with accompanying drawing: on accompanying drawing 1 base 20 motor transmission part 22 is housed, motor output shaft drives the reduction box power shaft thus and rotates by pulley decelerates, and reduction gearbox output shaft drives slider-crank mechanism and does reciprocating linear motion, below all are prior arts, no longer describe in detail.

Frame 24 tops of oil pumper are the suspending weight wheel 1 and the rope sheaves 2 of coaxial rotation, rope 3 is housed on the rope sheave and transfers rope 4, and an end of last rope 3 is fixed on the rope sheave 2, and the other end is fixed on the top of slider-crank mechanism 8; Transfer rope one end and be fixed on the rope sheave 2, the other end is fixed on the below of slide block 8 by directive wheel 14.With fixedly mounting suspending weight rope 5 and counterweight rope 6 respectively on the suspending weight of the rope sheave 2 coaxial rotation wheel 1, one end of counterweight rope is fixed on the counterweight dolly 7, the suspending weight rope is aimed at well head by positioning wheel 9, be connected to polished rod 21 on the polished rod eye 10 of suspending weight rope below, positioning wheel 9 is arranged on the well head top, be fixed on the frame, and can carry out the rotation of horizontal direction.

Accompanying drawing 2 has been described last rope 3 and has been transferred rope 4 cross arrangements on rope sheave 2, as can be seen from the figure, last rope with transfer rope and can adopt many steel cables, this just greatly reduces stressed on the single steel cable, the life-span of having improved steel cable.Simultaneously, the steel cable in the utility model also can change belt or chain into easily, to satisfy user or on-the-spot different needs.

Accompanying drawing 3 is to be fixed on easily on the rope sheave 2 and a kind of wire clips structural representation of design in order to go up rope 3 or to transfer rope 4 in the utility model.As can be seen from the figure wire clips 11 1 ends are fixed on the rope sheave 2, and the other end is a semicircular clamp, and the top of clamp is a buckle 12, and buckle 12 is enclosed within on the rope sheave 2.Last rope 3 or transfer rope 4 end and make a ring in advance on wire clips, gets final product ring set with buckle 12 fastenings.The wire clips of this structure makes the on-the-spot very facility of steel cable of changing.

Accompanying drawing 4 is a kind of a kind of adjustable movable pulleies that design for convenience of the on-the-spot requirement of using, this movable pulley 15 is the movable pulleies that help slider-crank mechanism to move up and down in guide rail 13, because the motion of crank block all will produce certain pressure to the motion of guide rail 13, will wear and tear between pulley 15 and the slide rail 13 produces the gap.The axle center 17 protruding parts of this adjustable type pulley that the utility model adopts, 17 two ends are provided with positioning bolt 16 in the axle center.17 top is provided with locking nut 18 in the axle center, can carry out the adjusting in gap with positioning bolt 16 like this, in addition, can not the time spent in movable pulley 15 wearing and tearing, can unclamp locking nut 18, change movable pulley 15, this has brought convenience for on-the-spot maintenance and replacing.

Accompanying drawing 5 is that the suspending weight rope is arranged on the vertical view in the positioning wheel.As can be seen from the figure the positioning wheel is to be made of two wheels, and the circumference intersection of two wheels is semicircular breach, and the suspending weight rope is stuck in the breach, has played the effect of rope winding jib, normally is wound on the suspending weight wheel to guarantee the suspending weight rope.The positioning wheel can move by the direction of X shown in Figure 6, y axle with the bolt positioning simultaneously, aims at well head easily to guarantee the suspending weight rope.During well workover herein, can forward the positioning wheel on the position of Fig. 7 to from Fig. 5.Workload when this has significantly reduced well workover, in the prior art normally suspending weight wheel be located at the well head top, during well workover, must move it, workload is very big.

In specific implementation process, when slide block 8 moved downward, last rope 3 was pulled to the below and moves, and drove rope sheave 2 and clockwise rotated, and at this moment transferred rope 4 and was wound onto on the rope sheave 2.When slide block 8 moves upward, transfer and restrict 4 by also moving down after the directive wheel commutation, drive rope sheave 2 and rotate counterclockwise, at this moment go up rope 3 and be wound onto on the rope sheave 2, so just moving up and down of slide block 8 has been transformed into the rotation of the both forward and reverse directions of rope sheave 2.Because rope sheave 2 and suspending weight wheel 1 is one coaxial, when rope sheave rotates, driven suspending weight and taken turns equidirectional rotation, suspending weight takes turns 1 when doing positive and negative rotation, has just driven sucker rod and the counterweight dolly pumps, thereby has finished the oil pumping process of long stroke.

One of embodiment of the present utility model is rope sheave radius r=0.6 meter, suspending weight wheel radius R=2.4 meter, and when 1.2 meters of ram travels, last rope is walked 1.2 meters downwards, and rope sheave turns over=radian of 1.2/r.And this moment, the suspending weight wheel also turned over=the 1.2/r radian.Suspending weight rope on the suspending weight wheel and the counterweight rope R=R/r1.2=4.8 rice of then will passing by, this value of R/r=4 is exactly the increment multiple.

The utlity model has following advantage:

1, the adjusting of stroke can be very big.We can select suitable suspending weight wheel and the ratio between the rope sheave as required in the mill.In use can reach the purpose of regulating stroke by the length of adjusting crank.The amplitude of stroke adjustment of the present utility model can be very big.With regard to the embodiment opinion, (be throw of crankshaft when 0.6 meter is transferred to 0.9 meter, stroke then changes to 7.2 meters from 4.8 meters, and amplitude of variation is 2.4 meters if ram travel is transferred to 1.8 meters from 1.2 meters.) and can obtain multiple length of stroke to satisfy operating mode.

2, energy-conservation and minimizing balance weight.Conventional pumping unit is because the counterweight block that is contained on the crank is excessive.So complete machine weight is inevitable big.And the balance weight displacement of the utility model design is very big, so the weight of counterweight block just can be corresponding less.Thereby obtain the effect that complete machine weight descends.And the crank balance mode, the balance torque changes.Equilibrant force is big apart from changing, and promptly the motor output current fluctuation is big.The balance mode that designs in the utility model, when not considering Dynamic Load Factor, the balance torque is a definite value.Current of electric in use fluctuates very for a short time like this, and the current value of beam-pumping unit is also little under the same operating mode of current value ratio, has reached energy-conservation effect.The direction of motion that has guaranteed slider-crank mechanism in the structure of the present utility model is consistent with the balance weight direction of motion.The weight of this part plays counterbalance effect.The result has alleviated the heavy amount of required balance, has reduced complete machine weight.

3, the kind of drive of various ways is grown, is convenient in time pinpoint the problems, be convenient to change, be convenient to adopt to the consumable accessory life-span.Long stroke machine class is a lot, moves seldom continuously but really can satisfy throughout the year, and its reason is not reach a standard in the life-span of consumable accessory, and can the life-span of consumable accessory meet the demands is the key that can a kind of oil pumper obtain applying.Consumable accessory is last rope 3 and transfers rope 4 in the utility model, can install many side by side from this steel cable of two of structure, to guarantee the every stressed strength limit that is significantly less than it of steel cable, again because the steel cable in the utility model only crooked twice (than bending in stroke of pitch increased type oil pumper tens times) in a stroke.The bend cycles number of times is few, fatigue life height.

4, few efficient height is paid in transmission.Transmission in the utility model is paid less, compares with the pitch increased type oil pumper, and the number that train is used significantly reduces, and loss in efficiency is little, the mechanical efficiency height.

Claims (4)

1, a kind of wheel shaft pitch increased type long stroke pumping unit that is grouped into by base, frame, motor part is characterized in that the coaxial suspending weight that is installed with in top of frame 24 is taken turns and rope sheave, and the diameter of suspending weight wheel 1 is greater than the diameter of rope sheave 2; Rope 3 is housed on the rope sheave and transfers rope 4, an end of last rope 3 is fixed on the rope sheave 2, and the other end is fixed on the top of slider-crank mechanism 8, transfers rope one end and is fixed on the rope sheave 2, and the other end is fixed on the below of slider-crank mechanism 8 by directive wheel 14; With fixedly mounting suspending weight rope and counterweight rope respectively on the suspending weight of the rope sheave 2 coaxial rotation wheel 1, the suspending weight rope is aimed at well heads by positioning wheel 9.

2, wheel shaft pitch increased type long stroke pumping unit according to claim 1 is characterized in that rope sheave is provided with semicircular wire clips 11, and the top of wire clips is a buckle 12, and buckle 12 can be enclosed within on the rope sheave 2.

3, wheel shaft pitch increased type long stroke pumping unit according to claim 1, the protruding part in axle center that it is characterized in that the pulley 15 on the slide block 8,17 two ends are provided with positioning bolt 16 in the axle center, and an end is provided with trivial jack panel 18 at the top in pulley 15 axle center 17.

4, wheel shaft long stroke pumping unit of stroke length increasing according to claim 1 is characterized in that the positioning wheel is to be made of two wheels, and the circumference intersection of two wheels is semicircular breach, and the suspending weight rope is stuck in the breach.

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