CN2845309Y - Flexible frequency controlled speed regulator of direct controlled oil sucker - Google Patents

Abstract

The utility model discloses a flexible-dragging frequency-changing and speed-regulating controller of a direct control type oil sucking machine, which comprises a frequency converter, a detection module circuit, a button module circuit, a central processing module circuit, a display module circuit, an output module circuit and a control quantity input module circuit, wherein the detection module circuit and the button module circuit respectively deliver current and voltage detection signals and keystroke commands into a central processing unit which then outputs and displays the result and display quantity of the signals, and simultaneously the current and voltage signals are converted into analog signal which is then delivered into an analog control input end of the frequency converter; the analog input module circuit comprises two output ends, one of the output ends is connected to the central processing unit, and the other end is connected with the output module circuit, so that the analog quantity (0 to 10V) which is output by a potentiometer is delivered into the central processing unit and/or the reference frequency of the frequency converter is controlled. The central processing unit can choose and deliver one kind of analogue signal out of the analogue signals which are output by the central processing unit and/or by the potentiometer into the frequency converter according to programs so as to control the frequency-changing of a traction motor.

Description

Flexible powering frequency changing regulating speed control apparatus of direct control oil pumping unit

Technical field

The utility model relates to the control appliance of dynamo-electric gear, is exclusively used in the frequency converter that oil-field oil pumper drags.

Background technology

At present, oil pumper is that rigidity drags, and system motion is independent of load, makes horse head move near the simple harmonic motion of rigidity, and the decelerator peak torque is big, moment of torsion inequality extent height, and impact load is big, and whole dynamic performance is relatively poor.What show is that motor power output excursion is very big, and average power is less relatively.In order to satisfy the needs of this certain loads, when selecting motor rated power, need be principle to satisfy the oil pumper maximum power, its result causes the low and energy waste greatly of motor operational efficiency, has increased system cost.And the energy-saving effect of existing oil pumper RHVC is not very remarkable, moreover the variation of tracking bearing power that can not be real-time and change the input power of frequency converter and the input power that power output is motor causes above-mentioned defective to can not get reversing always.

Summary of the invention

The purpose of this utility model be for the load utilization that solves the oil pumper dragging motor generally lower, the problem that energy waste is bigger, adopted 16 single-chip microcomputer 80C196KC of CHMOS high-performance technology to detect the input power or the power output of oil pumper RHVC frequency converter in real time, online in real time is adjusted rotating speed of motor, arteface goes out artificial oil pumper drag characteristics curve, make it as far as possible to the average power content convergence, it is steady to reach variable power, reduce maximum power, promote minimum power, thereby can reduce the rated power of motor, improve the purpose of the operating efficiency of system.Promptly when power is big, suitable reduction motor speed; At power hour, suitably improve rotating speed of motor, make system have higher operating efficiency on the one hand, guaranteed also that on the other hand the stroke jig frequency of oil pumper is constant substantially.The variation tendency of system power is slowed down, thus the control of the Flexible Drag of the system of realization.Frequency converter can be worked on certain frequency according to the setting of potentiometer under nominal situation.This Device Testing system will detect input voltage and input current or the output current and the output voltage of frequency converter.Control device calculates frequency converter according to the voltage and current that detects and inputs or outputs average power in a period of time after control device starts, subsequently again according to the setting of program, directly the variation of the given frequency of control of conversion device is the variation of input power or power output, and the input power of variation or power output are tried one's best to the average power content convergence.Make oil pumper variable power in running steady, reduce maximum power, promote minimum power, reduce motor rated power, improve the operating efficiency of system.Display system then demonstrates real-time voltage, electric current, the power of frequency converter input or output, the given frequency of frequency converter, the scope that frequency change is adjusted.

Technical solution of the present utility model is achieved in that

A kind of flexible powering frequency changing regulating speed control apparatus of direct control oil pumping unit, comprise frequency converter, it is characterized in that also comprising detection module circuit, key-press module circuit, central processing module circuit, display module circuit, output module circuit and controlled quentity controlled variable input module circuit, wherein said detection module circuit is electrically connected with the central processing module circuit, by detection, its signal is sent into CPU after the effective value conversion to frequency converter input current and input voltage or output current and output voltage; The key-press module circuit is electrically connected with the central processing module circuit, and the command signal of button is sent into CPU by photoelectrical coupler; CPU is exported its result and demonstration amount by read-write and signal processing to program; The display module circuit is electrically connected with CPU, comes display voltage, electric current, power, frequency and excursion thereof by drive circuit and displaying block; The output module circuit is accepted result's output of CPU, is converted to analog signal by number and sends into frequency converter, and its revolution is controlled; Analog quantity input module circuit has two outputs, one end connects CPU, one termination output module circuit is sent into 0～10V analog quantity of potentiometer output CPU and/or the reference frequency of frequency converter is controlled through operational amplification circuit.

Described detection module circuit is made up of current sensor, voltage sensor, effective value change-over circuit and institute, and detection signal is output voltage signal VAD and current signal 1AD after amplification and conversion, enters CPU.

Described key-press module circuit is made up of button input and control circuit and photoelectrical coupler, and wherein said button comprises stop key, operation key, options button, increase key and deceleration key, and key commands is sent it into CPU by photoelectrical coupler.

Described central processing module circuit is made up of single-chip microcomputer IC1 and program storage IC3, finishes the output of the read-write of program, various Signal Processing, demonstration amount and various results.

Described display module circuit is made up of special-purpose charactron display circuit and displaying block, finishes driving and demonstration control to eight LED charactron TOF-5461AH.

Described output module circuit is made up of digital converter, monolithic variable connector and frequency converter input end of analog signal, and digital converter is wherein accepted the analog signal of CPU output and it is inputed to frequency converter through variable connector.

Described controlled quentity controlled variable input module circuit is made up of potentiometer and operational amplifier, one of potentiometer output wherein connects operational amplifier, one connects the output module circuit, and the analog signal of its output is sent into CPU and/or sent into frequency converter analog quantity input through the monolithic variable connector through operational amplifier.

Compared with prior art, the utility model has the advantages that conspicuously, mainly show: can make pumping unit system realize not having the operation of impact, reduce peak load; Can reduce the oil pumper installed power significantly; Reduce the model of oil pumper; The motor power draw is tended to be steady, and energy-saving effect is remarkable.Flexible Drag and frequency conversion drag with power frequency and drag the operation conditions contrast, and average individual well peak load descends 6.8%, 11.2% respectively; Peak current descends 12.7%, 30.6% respectively; Active power descends 19.9%, 22.2% respectively.

Description of drawings

Fig. 1 is the conspectus of voltage sensor.

Fig. 2 is the conspectus of current sensor.

Fig. 3 is a voltage effective value change-over circuit schematic diagram.

Fig. 4 is a current effective value change-over circuit schematic diagram.

Fig. 5 is the key-press module circuit diagram.

Fig. 6 is the circuit diagram of photoelectrical coupler.

Fig. 7 is special-purpose charactron display circuit schematic diagram.

Fig. 8 is the d convertor circuit schematic diagram.

Fig. 9 is a potentiometer input circuit schematic diagram.

Figure 10 is a monolithic multi-way switch circuit schematic diagram.

Figure 11 is the central processing module circuit diagram.

Figure 12 is a system architecture diagram of the present utility model.

Figure 13 is the schematic diagram of the utility model control panel.

Figure 14 is an operation sequence flow chart of the present utility model.

Figure 12 is a specification digest accompanying drawing of the present utility model.

Among the figure: 1, current sensor 2, effective value transducer 3, voltage sensor 4, effective value transducer 5, button input and controller 6, photoelectrical coupler 7, program storage 8, special-purpose charactron display circuit 9, displaying block 10, digital converter 11, monolithic variable connector 12, frequency converter input 13, operational amplifier 14, potentiometer 100, detection module circuit 200, key-press module circuit 300, central processing module circuit 400, display module circuit 500, output module circuit 600, controlled quentity controlled variable output module circuit.

Embodiment

As Fig. 1～shown in Figure 14, a kind of flexible powering frequency changing regulating speed control apparatus of direct control oil pumping unit, comprise frequency converter, it is characterized in that also comprising detection module circuit, key-press module circuit, central processing module circuit, display module circuit, output module circuit and controlled quentity controlled variable input module circuit, wherein said detection module circuit is a KV50/AP type magnetic balance type voltage sensor, utilizes 1,4 corner connection of CON4 to go into measuring junction, during measuring voltage, tested voltage is by resistance R 1; R2; R3; R4; R5 is connected with transducer.Output current VIN is directly proportional with tested voltage.Also comprise KT150A type magnetic balance type current sensor in this module, output current IIN is proportional to tested electric current.The voltage VIN of voltage sensor output enters effective value change-over circuit AD536 through LF353 operational amplifier IC12A, and its output voltage V AD then enters single-chip microcomputer 80C196KC; The electric current I IN of current sensor output enters effective value change-over circuit AD536 through LF353 operational amplifier IC12B, and its output current IAD also enters single-chip microcomputer 80C196KC.

Described key-press module circuit by stop key (reset key) CON1, operation key CON2, options button CON3, increase key CON4, reduce key CON5 and form.When push button signalling was imported, signal entered single-chip microcomputer 80C196KC by photoelectrical coupler.

Described display module circuit is accepted single-chip microcomputer output content displayed, transmit data by 3 line serial line interfaces and enter eight Bits Serial cloudy LED charactron dynamic scan drive circuit MAX7219 altogether, use 3 interface DIN, LCK, LOAD, finish demonstration control and driving eight LED charactron TOF-5461AH.

Described central processing module circuit comprises single-chip microcomputer 80C196KC and program storage 28C64, single-chip microcomputer calculates average power according to the magnitude of current and the voltage gathered, and detect instantaneous power in real time, setting output digital quantity AD0-AD7 according to program, digital signal enters D/A converting circuit DAC0832, the digital quantity of output is changed into the analog quantity CVDA of 0-10V.

Described controlled quentity controlled variable input module circuit is made up of potentiometer and operational amplifier, and potentiometer output voltage values CVIN enters single-chip microcomputer 80C196KC through two amplifier LF353, another output order sheet variable connector of potentiometer.Monolithic variable connector CD4051 is a kind of single-ended 8 channel switchs, can select one in the X2 passage by the P1.5 signal at X1, and input and output X is connected.The analog quantity CVDA and the potentiometer output voltage amount CVIN of digital to analog converter DAC0832 output select output variable according to the setting of program.The analog quantity of output enters the analog quantity input terminal of frequency converter, realizes the control to the rotating speed that is the power of frequency converter.

Claims (7)

1, a kind of flexible powering frequency changing regulating speed control apparatus of direct control oil pumping unit, comprise frequency converter, it is characterized in that also comprising detection module circuit (100), key-press module circuit (200), central processing module circuit (300), display module circuit (400), output module circuit (500) and controlled quentity controlled variable input module circuit (600), wherein said detection module circuit (100) is electrically connected with central processing module circuit (300), by detection, its signal is sent into CPU after the effective value conversion to frequency converter input voltage and input current or output current and output voltage; Key-press module circuit (200) is electrically connected with central processing module circuit (300), and the command signal of button is sent into CPU by photoelectrical coupler; CPU is exported its result and demonstration amount by read-write and signal processing to program; Display module circuit (400) is electrically connected with CPU, comes display voltage, electric current, power, frequency and excursion thereof by drive circuit and displaying block; Output module circuit (500) is accepted result's output of CPU, is converted to analog signal by number and sends into frequency converter, and the revolution of motor is controlled; Analog quantity input module circuit (600) has two outputs, one end connects CPU, one termination output module circuit is sent into 0～10V analog quantity of potentiometer output CPU and/or the reference frequency of frequency converter is controlled through operational amplification circuit.

2, flexible powering frequency changing regulating speed control apparatus of direct control oil pumping unit according to claim 1, it is characterized in that described detection module circuit is made up of current sensor (1), voltage sensor (3), effective value change-over circuit (2) and (4), detection signal is output voltage signal VAD and current signal IAD after amplification and conversion, enters CPU.

3, flexible powering frequency changing regulating speed control apparatus of direct control oil pumping unit according to claim 1 and 2; it is characterized in that described key-press module circuit is made up of with control circuit (5) and photoelectrical coupler (6) the button input; wherein said button comprises stop key, operation key, options button, increase key and deceleration key, and key commands is sent it into CPU by photoelectrical coupler.

4, flexible powering frequency changing regulating speed control apparatus of direct control oil pumping unit according to claim 1 and 2, it is characterized in that described central processing module circuit (300) is made up of single-chip microcomputer IC1 and program storage IC3, finish the output of the read-write of program, various Signal Processing, demonstration amount and various results.

5, flexible powering frequency changing regulating speed control apparatus of direct control oil pumping unit according to claim 1 and 2, it is characterized in that described display module circuit (400) is made up of special-purpose charactron display circuit (8) and displaying block (9), finish the driving of eight LED charactron TOF-5461AH and show control.

6, flexible powering frequency changing regulating speed control apparatus of direct control oil pumping unit according to claim 1 and 2, it is characterized in that described output module circuit (500) is made up of digital converter (10), monolithic variable connector (11) and frequency converter input end of analog signal (12), digital converter is wherein accepted the analog signal of CPU output and it is inputed to frequency converter through variable connector (11).

7, flexible powering frequency changing regulating speed control apparatus of direct control oil pumping unit according to claim 1 and 2, it is characterized in that described controlled quentity controlled variable input module circuit (600) is made up of potentiometer (14) and operational amplifier (13), one of potentiometer output wherein connects operational amplifier, one connects the output module circuit, and the analog signal of its output is sent into CPU and/or sent into frequency converter simulation control input end through the monolithic variable connector through operational amplifier.

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