CN201262696Y - Intelligent controller for beam type oil extractor - Google Patents

Abstract

The utility model provides a beam pumping machine intelligent controller, comprising a current sampling circuit, a central processing unit (CPU), a power circuit, a display, a setting keyboard and a thyristor trigger circuit; the current sampling circuit and the setting keyboard are connected with an corresponding input interface of the CPU; different output terminals of the CPU are respectively connected with the input terminals of the display and the thyristor trigger circuit correspondingly; and the power circuit supplies DC power for the CPU and other relative circuits. The beam pumping machine intelligent controller has the advantages that the single-well power supply circuit generates an intermittent power supply mode without affecting the normal running of the pumping unit so that the electric energy stolen by electricity thief can not be normally used, thus achieving the effects of active electricity-theft prevention and saving plenty of electric energy for oil fields.

Description

The walking-beam pumping unit intelligent controller

Technical field

The utility model relates to a kind of walking-beam pumping unit intelligent controller, is used to control the intermittent power supply of the motor power of walking-beam pumping unit.

Background technology

The walking-beam pumping unit of oil field special use is one of major equipment of oil recovery process, and its power is three-phase current motor, and single-machine capacity is generally at 45KW, and its power consumption expense is the important component part of cost for oil production expense.The work of 6-10 mouth individual well oil pumper can be supplied with in general each station of recovering the oil, each individual well apart from the oil recovery stop spacing from 1-3Km, this segment distance is the stealing molecule location of stealing electric energy just, the individual well service cable is gone to pot repeatly because of stealing, a large amount of electric energy have not only been stolen, and often cause the oil pumper cisco unity malfunction, directly have influence on crude production rate and improve.

Summary of the invention

The purpose of this utility model provides a kind of walking-beam pumping unit intelligent controller, and is stolen and often cause the oil pumper cisco unity malfunction to solve walking-beam pumping unit power supply that prior art exists, directly has influence on the problem of crude production rate.

The technical solution of the utility model is: comprise current sampling circuit, central processing unit, power circuit, display, keyboard and thyristor gating circuit are set, current sampling circuit with keyboard be set be connected with the corresponding input interface of central processing unit, the different output terminals of this central processing unit respectively with corresponding connection of input end of display and thyristor gating circuit; Power circuit is supplied with the direct supply of central processing unit and other relevant circuit.

Described current sampling circuit comprises alternating voltage input interface, partial pressure potential device and the limiter that connects successively, and the limiter output terminal connects with the corresponding input end of described central processing unit.

Described thyristor gating circuit comprises intermittently gauge tap, triggering power supply, pulsing circuit and three-phase trigger pip amplifier, intermittently the input end of gauge tap is connected with the control output end of described central processing unit, and this, output terminal of gauge tap was connected on the DC loop of triggering power supply at intermittence; The output terminal of pulsing circuit is connected with three-phase trigger pip amplifier input terminal, and after the output terminal of this three-phase trigger pip amplifier triggered transformer isolation by one respectively, the trigger end with three groups of thyristors was connected respectively; The dc output end that triggers power supply is supplied with the working power of described pulsing circuit and three-phase trigger pip amplifier.

Described intermittence, gauge tap was made up of first order switch and second level switch, this first order switch is made up of triode, primary relay and leakage diode, the coil of the collector series connection primary relay of triode, leakage diode is connected in reverse parallel in the two ends of this coil; This second level switch comprises the secondary relay and oppositely is connected another leakage diode at the coil two ends of this secondary relay, the coil two ends of this secondary relay also are connected with the contact of described this primary relay, and the contact of this secondary relay is connected on the rectification circuit and the loop between the mu balanced circuit of described triggering power supply.

An input end at described central processing unit is connected with DLL (dynamic link library).

The utility model has the advantages that: can under the situation that does not influence the oil pumper operate as normal, make individual well supply line produce the intermittent power supply mode, the electric energy that the stealing molecule is stolen can't normally use, thereby reached active anti-electricity-theft effect, be a large amount of electric energy of oil field saving.

Description of drawings

Fig. 1 is an overall circuit block diagram of the present utility model;

Fig. 2 is the circuit theory diagrams (comprise current sampling circuit, central processing unit, power circuit, Current Display, the circuit diagram of the first order switch in keyboard, DLL (dynamic link library) and the thyristor gating circuit is set) of an embodiment of the present utility model;

Fig. 3 is the circuit diagram of brake tube trigger circuit of the present utility model (removing first order switch) remainder.

Embodiment

Referring to Fig. 1～Fig. 3, the utility model comprises current sampling circuit 1, central processor CPU, 5V DC power supply circuit 3, Current Display 2, keyboard 4, DLL (dynamic link library) 5 and thyristor gating circuit 6 is set, current sampling circuit 1, DLL (dynamic link library) 5 and keyboard 4 is set is connected, the different output terminals of this central processor CPU with the corresponding input interface of central processor CPU respectively with corresponding connection of input end of display 2 and thyristor gating circuit 6.5V DC power supply circuit 3 is supplied with the direct supply of central processor CPU and other relevant circuit.

Central processor CPU adopts the single-chip microcomputer that has the A/D translation function to constitute with conventional peripheral circuit.

Described current sampling circuit 1 comprises alternating voltage input interface P2 (Current Transformer is obtained the ac voltage signal of 0～1000mv from the winding of motor), partial pressure potential device W that connects successively and the limiter that is connected to form by two interconnective 5v voltage stabilizing diodes of positive pole and current-limiting resistance R1, and this limiter output terminal connects with the corresponding input end of described central processing unit.

Described thyristor gating circuit 6 comprises two-stage intermittently gauge tap 61 and 62, triggering power supply 63 (conventional regulator rectifier circuit), pulsing circuit 64 (custom circuit) and three-phase trigger pip amplifier 65～67; The output terminal ZD of pulsing circuit 64 is connected with the input end ZD of three-phase trigger pip amplifier 65～67, and this three-phase trigger pip amplifier 65～67 is respectively by three large power triodes (1Q2,1Q3,1Q4; 2Q2,2Q3,2Q4; 3Q2,3Q3,3Q4 and peripheral original paper are conventional to be connected) form composite amplifier, after the output terminal of each amplifier 65～67 was isolated by a triggering transformer B1, B2 and B3 respectively, the trigger end with three groups of thyristor KP1, KP2 and KP3 was connected respectively.Trigger the described pulsing circuit 64 of dc output end output ± 12V direct-current power supply of power supply 63 and the working power of three-phase trigger pip amplifier 65～67.Amplifier N1A among Fig. 3 in the Far Left circuit is the same integrated circuit of N1B in the pulsing circuit 64.

Described intermittence, the first order switch 61 of gauge tap was made up of triode Q1, primary relay K1 and leakage diode D9, the coil of the collector series connection primary relay K1 of triode Q1, leakage diode D9 is connected in reverse parallel in the two ends of primary relay K1 coil; This at intermittence gauge tap second level switch 62 another leakage diode 6D5 of comprising secondary relay 6K1 and oppositely being connected the coil two ends of this secondary relay 6K1, the coil two ends of this secondary relay 6K1 also are connected with the contact of described this primary relay K1, and the contact of this secondary relay 6K1 is connected the rectification circuit of described triggering power supply 63 (bridge rectifier circuit of being made up of four diode 6D1～6D4 and filter capacitor 6C1～6C4) and mu balanced circuit (the three terminal regulator 6U1 that are connected by two symmetries, 6U2 and peripheral Resistor-Capacitor Unit are formed) between the loop on.

Pulsing circuit 64 transports amplifier N1B by one and peripheral capacitance-resistance original paper is formed oscillatory circuit, amplification and filtering (compositions such as the capacitance-resistance original paper of triode 4Q1 and periphery thereof and diode 4D1, half-wave is born in filtering) and amplification (triode 4Q2) back output control pulse signal through the back.

The utility model is installed near the transformer at the station of recovering the oil, in use with convenient management.

The course of work of the present utility model is:

The working current signal of the motor of oil pumper is imported from interface P2 by sampling current, behind current sampling circuit 1 dividing potential drop amplitude limit, deliver to central processor CPU and handle (A/D conversion, current waveform comparison, minimum current are chosen, the and intermittently output etc. of control signal of time ratio), control by internal processes.The output of central processor CPU is carried out by relay K 1 control startup-shutdown; export thyristor trigger electrode interface T6 to through the P5 interface; relay 6K1 control triggers power supply 63; as the K1 adhesive; 6K1 is adhesive immediately; trigger power supply 63 output ± 12V direct supplys; pulsing circuit 64 gets electric generation pulse train; pulse train promotes A respectively; B; C three-phase trigger power amplifier; the back is by triggering transformer B1; B2; B3 triggers KP1 respectively after isolating; KP2; three groups of thyristors of KP3 make its conducting respectively; the threephase asynchronous of oil pumper must be established the beginning operation by cable, drives the beam-pumping unit oil pumping.Discharge (disconnection) as K1, relay 6K1 disconnects thereupon, triggers power supply 63 and stops power supply, KP1, KP2, KP3 end, threephase asynchronous dead electricity, the motor certain hour that can turn round under the double action of the gravitional force of its oil pumper balancing weight and inertia is finished a process of intermittent power supply.

Design concept of the present utility model is:

The oil girder-like oil pump when operation its two ends heavily approximately several tons counterbalance weight in the process that 360 degree rotate, main effect is that the counter weight device that sets when transferring acting is caught up with in the balance oil pumping, because the balance rotating position constantly changes, the load of its motor is fluctuation status, the current minimum of the maximum current that its rule is generally beam hanger motor when rising motor when beam hanger is transferred, again to the maximal value of lifting the counterweight primary current, to negative power interval and then to beam hanger rising lowest high-current value be a stroke, its time mostly is every 10-15 and finishes a spurt second.

Characteristic by above-mentioned oil pumper work, we thought in a period of time in negative power district, cut off motor power, under descending less situation, recovers motor speed the power supply of motor then, outage is generally 1.5-4 second during this period of time in each jig frequency, and there is not excessive dash current when restoring electricity, the problem that does not have restart, this section load region node area that also we utilized just, thus the on-stream dead electricity of above-mentioned oil pumper and electric process can not influence the operate as normal of oil pumper and motor thereof fully.

Stop power supply during this period of time in load region, calculate power saving rate by us and can reach 15%.

Because oil pumper is after having used this device, power supply mode becomes intermittent power supply, the electric energy that the stealing molecule is stolen is the discontinuity power supply, can't supply with uses such as its household electrical appliances, water pump, illumination and agricultural motor transformer, therefore phenomenon such as avoided at the oil recovery station punching to the electric wire of well head motor, private to draw disorderly connecing, the purpose that has promptly reached economize on electricity has been avoided the treat well of oil well because of cable fault again, has improved the rate of driving a well.

To defend No. 36 stations, east is example, before using this device, recording the well head electric current is 8-12A, electric current is 30-35A in this well station, install additional and record that electric current is 8-12A in well head electric current and the station behind this device, after that is to say this device of installation, avoided the power-steeling quantity of 22-43A electric current between station and well head motor, its effect is very obvious.With above-mentioned experiment well is example, and contrasting in 3.-5 month by the electricity consumption of installing these device front and back additional is recoverable fully invested cost.

This device circuit has partly adopted the intelligent controller of our factory independent research, and select for use the power supply of high intelligent switch MTC module controls motor to switch, stability and automaticity have been improved greatly, the pulse train trigger mode is adopted in the triggering of module, the reliability of comparing with present like product is higher, uses more convenient to operate.Therefore with regard to present we think that this product is just energy-conservation anti-electricity-theft, be a kind of more satisfactory new product, according to the stealing electricity phenomenon of my unit at present serious situation relatively, this product has bigger promotional value.

Analyze theoretically, the weight of balancing weight and crank arm should with being equal in weight of oil pumping polish rod, balancing weight whenever rotates a circle, oil pumping polish rod drives the oil well pump of oil well bottom and finishes a jig frequency.Working routine, in between on-stream period, because the vertical graviational interaction of ground gains in depth of comprehension, cause and have only when balancing weight is in horizontality, oil pumping polish rod and balancing weight can reach optimal balance point (not calculating the weight of liquid and friction factor) when all the other states, oil pumper all is in a non-equilibrium state during this time, it when balancing weight is up an energy storage state, be to release the energy state when descending, so motor institute work, being one has periodically variable energy (being the actual active power cyclical variation of motor) maximum power value will occur when going upward to the 45 degree left and right sides, coming downwards to 45 when spending, about a minimal power values will appear, the negative power district may appear sometimes.Therefore carry at walking-beam pumping unit and whenever finish a work period, can stop power supply a period of time in the light loading district or the negative power district of motor (energy that makes full use of its release) and then restore electricity fully, motor is with continual normal operation, the motor power supply can't normally use the electric energy that intermittent power supply is stolen the stealing molecule, has reduced the stealing electricity phenomenon generation.

Claims (5)

1, a kind of walking-beam pumping unit intelligent controller, it is characterized in that: comprise current sampling circuit, central processing unit, power circuit, display, keyboard and thyristor gating circuit are set, current sampling circuit with keyboard be set be connected with the corresponding input interface of central processing unit, the different output terminals of this central processing unit respectively with corresponding connection of input end of display and thyristor gating circuit; Described power circuit is supplied with the direct supply of central processing unit and other relevant circuit.

2, walking-beam pumping unit intelligent controller according to claim 1, it is characterized in that: described current sampling circuit comprises alternating voltage input interface, partial pressure potential device and the limiter that connects successively, and the limiter output terminal connects with the corresponding input end of described central processing unit.

3, walking-beam pumping unit intelligent controller according to claim 1, it is characterized in that: described thyristor gating circuit comprises intermittently gauge tap, triggering power supply, pulsing circuit and three-phase trigger pip amplifier, intermittently the input end of gauge tap is connected with the control output end of described central processing unit, and this, output terminal of gauge tap was connected on the DC loop of triggering power supply at intermittence; The output terminal of pulsing circuit is connected with three-phase trigger pip amplifier input terminal, and after the output terminal of this three-phase trigger pip amplifier triggered transformer isolation by one respectively, the trigger end with three groups of thyristors was connected respectively; The dc output end that triggers power supply is supplied with the working power of described pulsing circuit and three-phase trigger pip amplifier.

4, walking-beam pumping unit intelligent controller according to claim 3, it is characterized in that: described intermittence, gauge tap was made up of first order switch and second level switch, this first order switch is made up of triode, primary relay and leakage diode, the coil of the collector series connection primary relay of triode, leakage diode is connected in reverse parallel in the two ends of this coil; This second level switch comprises the secondary relay and oppositely is connected another leakage diode at the coil two ends of this secondary relay, the coil two ends of this secondary relay also are connected with the contact of described this primary relay, and the contact of this secondary relay is connected on the rectification circuit and the loop between the mu balanced circuit of described triggering power supply.

5, walking-beam pumping unit intelligent controller according to claim 1 is characterized in that: an input end at described central processing unit is connected with DLL (dynamic link library).

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