CN2784618Y - Optimized operating device for beam-pumping unit - Google Patents

Abstract

The utility model discloses an optimized operating device for a walking beam type oil pumping unit, which mainly comprises a microcomputer control unit, a frequency conversion and speed regulation unit, a position transducer, a temperature control unit and an operational unit. The utility model is characterized in that the microcomputer control unit is the core of the device, and a comparing and processing program for the filling state and the under-filling state of the current change of an oil pumping unit motor is arranged in the microcomputer control unit to control the frequency conversion and speed regulation unit to change the rotary speed of the motor and regulate the stroke frequency of the oil pumping unit. The utility model can regulate the stroke frequency and the stroke ratio in a stepless mode, and satisfy the matching of the pumping speed and the liquid supply speed, farthest ensure the filling state of liquid in a pump and implement the purpose of the optimized operation of the oil pumping unit.

Description

Beam pumping unit is optimized running gear

Technical field

The utility model relates to a kind of oil-field oil pumper, especially relates to a kind of beam pumping unit and optimizes running gear.

Background technique

Existing oil field beam pumping unit is in the manufacturing mechanism in oil field, and power consumption is maximum, accounts for 40% of the total power consumption in oil field.The height of pumping unit system operational efficiency has significant relationship with down-hole factor especially pump degree of filling, if there is not liquid in the pump, no matter how pumping unit moves on the ground, efficient all is zero, the main cause that pump is not fully filled is the speed that liquid supply speed is unable to catch up with drawing, judge whether well pump is full of and has only at present by regular visit, analyze indicator diagram and producing fluid level and judge that automation and high efficiency are far from being.Pump is not fully filled not only influences efficient, also can cause liquid hammer, quickens the damage of sucker rod, increases oil well operation number of times, very harmful.And the general feed flow deficiency of pumping well, the down-hole situation changes greatly, operating load is the cycle alternate load, promptly within several seconds, motor will be from zero load to fully loaded again to the variation of zero load or even negative value, add the effect of balancer weight, each changes the efficient that all can have influence on pumping unit, and can the operating mode of this variation complexity efficiently be moved for pumping unit and proposed challenge.Chinese patent ZL96201939.9, a kind of pumping unit automatic controller of regulating that changes with the electric current in the whole stroke is disclosed, the deficiency of this design is, for instance: one long 1000 meters long, heavily about 3 tons of the rod string that diameter is 22 millimeters, nearly 2 tons of fluid column on the plunger, and the interior liquid of pump is altogether also with regard to tens kilograms, add dynamic load and friction, the upper punch polished rod load reaches the 5-10 ton, and the weight that whether liquid is full of in the pump is very little, and what difference the moment of torsion of converting on the crankshaft fundamentally can not have, before down stroke is also just being run into liquid level, have any different (fluid column weight is arranged), run into the another sample of liquid level unloading back polished rod load.And polished rod load moment of torsion on crankshaft is to be subjected to dwindling of torque factor, the incipient stage, contracts more for a short time, and especially under the state of slight " liquid hammer ", the variation of this point point electric current can not be found out in the electric current of whole process; When rod parting, though during upstroke because of there not being fluid column load to reduce exerting oneself of motor, but during down stroke, because of polished rod load diminishes, motor will go out very big power and lift balancer weight, comprehensive electric current may be more taller than normal operation, and control judges that not only accidents happened, also can strengthen run-time error by this way.

Summary of the invention

The purpose of this utility model is to overcome the deficiency that above-mentioned prior art exists, and is means and provide a kind of to adjust the underwell pump degree of filling, thereby reaches the device of pumping unit optimization operation.The technical solution used in the present invention comprises compositions such as microcomputer control unit, frequency control of motor speed unit, position transducer, operating unit, temperature control unit.It is characterized in that: position transducer is connected with the oil pumping machine crank axle, and the information of crankshaft operation is imported microcomputer control unit by position transducer, with the up-down stroke of automatic identification pumping unit.The current of electric situation of change is monitored in real time by the simulation way of output in the frequency control of motor speed unit, and with its input microcomputer control unit, full state and non-full state comparison process program that the pumping-unit motor electric current changes are set in microcomputer control unit, control the frequency control of motor speed unit then and change rotating speed of motor, adjust the jig frequency of pumping unit, reach the coupling of the speed of drawing and liquid supply speed, guarantee liquid full state in the pump to greatest extent, realize the purpose of pumping unit optimization operation.Have transparent window in the side cashier's office in a shop at device, convenient various Operational Limitss and working state of observing pumping unit.Microcomputer control unit adopts modular design, is contained in the shielding can of electromagnetic protection function, isolates with strong power part, has increased reliability and Security, and simultaneously, this module adopts plug-in type that easy-to-operat is installed.Operating unit comprises relay, A.C. contactor and is provided with in the cabinet side and start and stop button that need not open the cabinet door can start and stop, and the field produces personnel operation also is convenient in the protection of being convenient to device proper.Temperature conditioning unit is the thermostat unit of independent operating, automatic heating and refrigerating function are arranged, and pumping unit is a camp equipment, and winter, outdoor temperature can reach negative 40 degrees centigrade, positive 40 degrees centigrade can be reached summer, the round-the-clock running of this device can be guaranteed through the temperature regulation effect of temperature conditioning unit.

The beneficial effects of the utility model are: 1, adopted soft start, because there is converter unit to arrive power frequency again at low-frequency start, reduced the impact of electric motor starting electric current; 2, changed original in changing the jig frequency regulating method of belt pulley, can realize stepless regulate jig frequency and dash than, do not regulate jig frequency with shutting down, can make pumping unit last fast slow down or on slowly down fast mode move, need get final product by operator's button; 3, the built-in big electric capacity of converter unit is realized power back-off, can improve power factor; 4, position sensor in this device is discerned up-down stroke automatically; 5, the regulating action of temperature conditioning unit, but assurance device round-the-clock running; 6, overvoltage, excess current, under-voltage, overload, overheat protective function; 7, switching function can automatically switch to power frequency operation during abnormal conditions, unlikelyly causes the meaningless shutdown of pumping unit; 8, convenient up-down stroke real-time current and the maximum current of showing is to judge the equilibrium condition of pumping unit.

The jig frequency that this device is regulated pumping unit automatically by the degree of filling of judging pump guarantees that pumping unit moves at any time under full state, not only improved efficiency of the pumping unit, also lays a solid foundation for following oil field automation, digitizing.

Description of drawings

Fig. 1 is the utility model working principle schematic representation

Fig. 2 is the utility model form structure schematic representation

Fig. 3 is the utility model microcomputer control unit circuit theory schematic representation

Embodiment

Below in conjunction with description of drawings the concrete enforcement of model utility is further set forth, as shown in Figure 1: the utility model comprises microcomputer control unit (1), frequency control of motor speed unit (2), position transducer (4), temperature control unit (6), operating unit (5) composition.It is characterized in that, described microcomputer control unit (1) is the core of this device, full state and non-full state comparison process program that the pumping-unit motor electric current changes are set in it, control the rotating speed that frequency control of motor speed unit (2) changes motor (3) then, adjust the jig frequency of pumping unit, can realize stepless regulate jig frequency and dash than, reach the coupling of the speed of drawing and liquid supply speed, guarantee liquid full state in the pump to greatest extent, realize the purpose of pumping unit optimization operation.Motor (3) electric current situation of change is monitored in real time by the simulation way of output in frequency control of motor speed unit (2), and with its input microcomputer control unit (1), to judge the equilibrium condition of pumping unit; Position transducer (4) is with the information input microcomputer control unit (1) of oil pumping machine crank axle operation, with the up-down stroke of automatic identification pumping unit; Operating unit (5) comprises button, tutorial light, relay, A.C. contactor; Temperature conditioning unit (6) is the thermostat unit of independent operating, and automatic heating and refrigerating function are arranged, by microcomputer control unit (1) this unit temp of automatic control and adjustment, but the assurance device round-the-clock running.

As shown in Figure 2: be the form structure of the utility model device, various instrument, tutorial light, switch button of this device etc. are installed.Among the figure: start-stop button (22); Be provided with in the transparent window (21): voltmeter (213); Microcomputer adjuster (214); Ammeter (215); Power frequency tutorial light (216); Frequency conversion tutorial light (217); Run indicator (218); Fault indicating lamp (219); Burner on light (2110); Running state selector switch (2111); Start, stop, frequency conversion fault homing light (2112,2113,2114); Be provided with in the microcomputer adjuster (214): jig frequency and up stroke electric current show (2141); Dashing when, the down stroke electric current shows (2142); Jig frequency/dash than showing (2143); The real-time current of stroke shows (2144) up and down; The maximum current of stroke shows (2145) up and down; Microcomputer control unit power supply indicator (2146); The belt pulley data select switch (2147) of current use; Basic jig frequency is provided with button (2148); Microcomputer control unit reset button (2149); Data validation button (21410) is set; Data are provided with button (21411).

As shown in Figure 3: be microcomputer control unit (1) circuit theory schematic representation, microcomputer control unit (1) mainly comprises CPU (37); With the load button contact (31,32) of operating unit (5) be the I/O port that inserts CPU (37); Operation starts intermediate dc relay (35), fault conversion intermediate dc relay (36), the upper position limit switch (33) of link position sensor (4), the next position limit switch (34), the same I/O port that inserts CPU (37), the I/O port of CPU (37) is isolated from the outside by optocoupler; The simulation A/D converter (312) that connects converter unit (2) inserts the A/D converter (311) of CPU (37), with the current information input CPU (37) of motor (3); The D/A converter (38) of CPU (37) output simultaneously 0～+ aanalogvoltage of 10V gives converter unit (2), the operation frequency of control converter unit (2); Among the figure: (2141), (2142) are jig frequency and the demonstration of up stroke electric current in the microcomputer adjuster (214) and dash down stroke electric current demonstration when.

Claims (4)

1, a kind of beam pumping unit is optimized running gear, mainly comprise microcomputer control unit (1), frequency control of motor speed unit (2), position transducer (4), temperature control unit (6), operating unit (5) composition, it is characterized in that: full state and non-full state comparison process program that the pumping-unit motor electric current changes are set in the described microcomputer control unit (1), and the rotating speed of connection frequency control of motor speed unit (2) control break motor (3), the jig frequency of adjustment pumping unit; Described position transducer is connected with the oil pumping machine crank axle, and the information of crankshaft operation is by position transducer (4) input microcomputer control unit (1).

2, a kind of beam pumping unit according to claim 1 is optimized running gear, and it is characterized in that: described microcomputer control unit (1) mainly comprises CPU (37); The I/O port of CPU (37) is inserted in the load button contact of operating unit (5) (31,32); Operation starts intermediate dc relay (35), fault conversion intermediate dc relay (36), the upper position limit switch (33) of link position sensor (4), the next position limit switch (34), the same I/O port that inserts CPU (37), the I/O port of CPU (37) is isolated from the outside by optocoupler.

3, a kind of beam pumping unit according to claim 1 is optimized running gear, it is characterized in that: the simulation A/D converter (312) of described frequency control of motor speed unit (2) inserts the A/D converter (311) of CPU (37), with the current information input CPU (37) of motor (3); The D/A converter (38) of CPU (37) output simultaneously 0～+ aanalogvoltage of 10V is connected for A/D converter (310), controls the operation frequency of frequency control of motor speed unit (2) with frequency control of motor speed unit (2).

4, optimize running gear according to claim 1 or 2 each described a kind of beam pumping units, it is characterized in that: described microcomputer control unit is an integrated circuit module, is installed in the shielding can of electromagnetic protection function, isolates with strong power part.

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