CN101614119B - Mobile balance block device for beam-type balance oil extractor - Google Patents

Abstract

The invention relates to a mobile balance block device for a beam-type balance oil extractor, comprising a balance block. The balance block is arranged on a hydraulic and static pressure floating track that is arranged on an extension line at the tail end of the oil extractor beam; the balance block is connected with a piston rod of a hydraulic cylinder that is arranged in the tail end of the oil extractor beam; a first oil cavity and a second oil cavity of the hydraulic cylinder are respectively connected with corresponding ports of an electromagnetic exchange valve through a pipeline; two oil return outlets of the electromagnetic exchange valve are respectively connected with a hydraulic oil tank through an oil return path; a fluid inlet of the electromagnetic exchange valve is connected with a fluid outlet of a hydraulic pump through a pipe; and a fluid inlet of the hydraulic pump is connected with a fluid reservoir through a pipeline. The balance block can be designed in a mobile way, and the balance weight of upper and lower strokes can be reasonably configured, thereby the aim of saving energy can be achieved.

Description

Mobile balance block device for beam-type balance oil extractor

Technical field

The present invention relates to a kind of used for oil extractor bascule, specifically relate to a kind of for the portable bascule of the balance weight on the oil pumper.

Background technology

The oil field is widely used crank-balanced pumping unit, because the position of balance weight when operation fixed, the balanced action that is risen in upper and lower stroke is the same.But oil pumper is in actual motion, and upstroke institute work is the weight such as lifting arm, pump, fluid column, and the down stroke work only has the weight of bar, pump etc.This just illustrates oil pumper in actual motion, and the required balance merit of upper and lower stroke is different, and this has just formed the waste of portion of energy.

Summary of the invention

Purpose of the present invention is the shortcoming for the energy waste of existing crank-balanced pumping unit existence, and a kind of mobile balance block device is provided, and reaches energy-conservation purpose.

The technical scheme that adopts is:

Mobile balance block device for beam-type balance oil extractor comprises balance weight, hydraulic pump or air pump, balance weight sliding rail, hydraulic cylinder or cylinder (oil storage or gas).

Hydraulic cylinder or gas tank are installed in the inside of walking beam on pumping units, and the balance weight sliding rail is hydraulic pressure static pressure floating rail road, is arranged on the beam travelling tail end extended line of oil pumper.The piston rod outer end of hydraulic cylinder or cylinder is fixedly connected with balance weight.Liquid or gas control loop at hydraulic pump or air pump are equiped with solenoid operated directional valve.Reciprocating by solenoid operated directional valve control hydraulic cylinder or cylinder, thus it is reciprocating on the hydraulic static track to promote balance weight.

Energy-conservation and operating principle:

During oil pumper work, by at the oil pumper running, change the position of balance weight, make balance weight unequal in the balance merit of upper and lower stroke, provide different balance merits by upper and lower stroke acting difference, can realize energy-conservation effect.

Accompanying drawing 2 is the beam-type balance oil extractor fundamental diagram, and Wb is balance weight, and Xuc is the unbalanced value of oil pumper itself, converts the additional equilibrant force on the walking-beam counterweight position of centre of gravity.

Energy below by oil pumper calculates, and sets forth the principle that adopts the mobile balanced block method to adjust the upper and lower stroke balance acting of oil pumper:

Because: Eu=(Wr+Wl) * S (formula 1)

Ed=Wr*S (formula 2)

Annotate: Eu---the energy that upstroke is required.

Ed---the energy that down stroke is required.

Wr---bar, pump weight.

Fluid column weight in Wl---the oil pipe.

S---oil well pump stroke.

Can draw by balance weight, crank, walking beam acting equally:

$\mathrm{Eu}=\frac{c1}{a}S(\mathrm{Wb}+\mathrm{Xuc})+\mathrm{Wml}$

$\mathrm{Ed}=\frac{c2}{a}S(\mathrm{Wb}+\mathrm{Xuc})+\mathrm{Wm}2$

In the formula: Wm1, Wm2 are respectively that motor is in up-down stroke institute work.

By formula 1 and formula 2 as can be known, the energy of Eu, Ed is unequal, so the required balance merit of upper and lower stroke also is different, namely required trimming moment C is unequal in upper and lower stroke, C1 ≠ C2 namely,, such foundation:

Eu＝(Wr+Wl)*S Ed＝Wr*S

Namely draw:

$(\mathrm{Wr}+W1)*S=\frac{c1}{a}S(\mathrm{Wb}+\mathrm{Xuc})+\mathrm{<figure-callout\; id="1"\; label="Wm"\; filenames="H2009100127656E00021.png"\; state="\{\{state\}\}">Wm</figure-callout>}1$

$\mathrm{Wr}*S=\frac{c2}{a}S(\mathrm{Wb}+\mathrm{Xuc})+\mathrm{Wm}2$

Abbreviation both drew:

$\mathrm{Wm}1-\mathrm{Wm}2=\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="H2009100127656E00021.png"\; state="\{\{state\}\}">W</figure-callout>}1*S-(\frac{c1}{a}-\frac{c2}{a})S(\mathrm{Wb}+\mathrm{Xuc})$

If the motor work is minimum, just make the upstroke work equal the down stroke work, that is: Wm1-Wm2=0 so just draws:

$\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="H2009100127656E00021.png"\; state="\{\{state\}\}">W</figure-callout>}1*S-(\frac{c1}{a}-\frac{c2}{a})S(\mathrm{Wb}+\mathrm{Xuc})=0$

$(\frac{c1}{a}-\frac{c2}{a})(\mathrm{Wb}+\mathrm{Xuc})=\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="H2009100127656E00021.png"\; state="\{\{state\}\}">W</figure-callout>}1$

c1-c2＝Wla/(Wb+Xuc)

C1-c2 is exactly the amount that moves along the walking beam axis at balance weight in upper and lower stroke procedure.

The balance weight of existing oil pumper is fixed, and is uncontrollable.But be again different for the required counterpoise of oil pumper upper and lower stroke in oil pumping process, drawn the required trimming moment of upper and lower stroke according to above calculating and differed c1-c2.

My solution is that balance weight Wb is designed to movably thus, it is in the c2 position when upstroke, and it is in the c1 position when down stroke, to guarantee different trimming moment required in the upper and lower stroke, keep the balance of upper and lower stroke acting, its amount of movement is:

c1-c2

Such way can be eliminated in down stroke, and this part idle work of (c1-c2) * (Wb+Xuc) that oil pumper is done has reached the purpose of oil pumper saves energy.

The move mode of balance weight can adopt the methods such as hydraulic pressure, pneumatic, electromagnetism to realize.Because the weight of balance weight is generally all very large, move the frictional force that overcomes also very large, can not fast moving.Given this, the moving track of balance weight can be designed to hydraulic pressure static pressure slideway type, reduce the frictional force of track, realize fast moving.Mobile power source can install air pump additional from the pumping-unit motor power taking, promotes the fast moving of balance weight with cylinder.

In a word, balance weight is designed to movably mode, counterpoise that can the upper and lower stroke of reasonable disposition, and then reach energy-conservation purpose.

Description of drawings

Fig. 1 is a kind of structural representation of the present invention.

Fig. 2 is the beam-type balance oil extractor fundamental diagram.

The specific embodiment

Mobile balance block device for beam-type balance oil extractor comprises balance weight 1, hydraulic pressure static pressure floating rail road 2, hydraulic cylinder 3, solenoid operated directional valve 4, hydraulic pump 5, hydraulic oil container 6, overflow valve 7 and oil storage cylinder 8.The outer end of the piston rod 9 of hydraulic cylinder 3 is fixedly connected with balance weight 1, and balance weight 1 is arranged on the hydraulic pressure static pressure floating rail road 2.Hydraulic cylinder 3 is installed in the inside of walking beam on pumping units 10, and hydraulic pressure static pressure floating rail road 2 is arranged on the walking beam on pumping units 10 tail end extended lines.The liquid outlet of oil storage cylinder 8 is connected by the inlet of pipeline with hydraulic pump 5, and the liquid outlet of hydraulic pump 5 is connected by the inlet of pipeline with solenoid operated directional valve 4.The first oil pocket 11 of hydraulic cylinder 3 be connected oil pocket 12 and be connected by the corresponding interface of pipeline with solenoid operated directional valve 4 respectively, two oil returns outlets of solenoid operated directional valve respectively by the first oil return line 13 be connected oil return line 14 and be connected with hydraulic oil container 6.The first oil return line 13 is connected with overflow valve 7 by arm 15, and when hydraulic oil container 6 interior oil pressure surpassed setting pressure, overflow valve 7 was opened and overflowed an amount of oil.

Hydraulic cylinder 3 can be substituted by pneumatic cylinder, and hydraulic pump 5 can be substituted by air pump.

Claims (2)

1. mobile balance block device for beam-type balance oil extractor comprises balance weight (1), it is characterized in that:

Balance weight (1) is arranged on the hydraulic pressure static pressure floating rail road (2), and hydraulic pressure static pressure floating rail road (2) is arranged on the extended line of walking beam on pumping units (10) tail end;

Balance weight (1) is connected with the piston rod (9) of hydraulic cylinder (3), and hydraulic cylinder (3) is arranged in walking beam on pumping units (10) tail end;

First oil pocket (11) of hydraulic cylinder (3) be connected oil pocket (12) and be connected by the corresponding interface of pipeline with solenoid operated directional valve (4) respectively, two oil returns outlets of solenoid operated directional valve respectively by the first oil return line (13) be connected oil return line (14) and be connected with hydraulic oil container (6);

The inlet of solenoid operated directional valve (4) is connected with the liquid outlet of hydraulic pump (5) by pipe, and the inlet of hydraulic pump (5) is connected with fluid reservoir by pipeline.

2. mobile balance block device for beam-type balance oil extractor according to claim 1 is characterized in that the first oil return line (13) is connected with overflow valve (7) by arm (15).

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