CN111472725B

CN111472725B - Intelligent oil pumping unit for detecting liquid level height

Info

Publication number: CN111472725B
Application number: CN202010233721.2A
Authority: CN
Inventors: 杨丽荣
Original assignee: Shanghai Fuquan Engineering Technology Co ltd
Current assignee: Shanghai Fuquan Engineering Technology Co ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2022-03-25
Anticipated expiration: 2040-03-27
Also published as: CN111472725A

Abstract

The invention provides an intelligent pumping unit for detecting liquid level, which is arranged at an oil well and realizes oil pumping by reciprocating an oil well pump, and is characterized by comprising the following components: the oil pumping device comprises an oil pumping actuating device and an oil pumping control device, wherein the oil pumping actuating device is provided with an oil pumping transmission mechanism and a driving motor, and the oil pumping control device is provided with an operating terminal, a frequency converter and a controller. The oil pumping control device is provided with an operation terminal, a frequency converter and a controller. The frequency converter is electrically connected with the driving motor and is provided with a measuring part, a frequency conversion side communication part and a frequency conversion side control part, the operation terminal is provided with a picture storage part, a display part, an operation side communication part and an operation side control part, and the controller is provided with a indicator diagram storage part, a parameter storage part, a current indicator diagram generation acquisition part, a stroke frequency acquisition part, a pump efficiency calculation part, a current liquid level height calculation part, a control side communication part and a control side control part.

Description

Intelligent oil pumping unit for detecting liquid level height

Technical Field

The invention belongs to the technical field of pumping unit equipment, and particularly relates to an intelligent pumping unit for detecting liquid level.

Background

At present, newly-increased oil extraction reserves of old oil fields in China are insufficient, most of the oil fields enter the annual output reduction stage, and the residual oil distribution is very complex, so that the difficulty of extraction or adjustment is very high, and therefore, oil field managers need to improve the output of the oil fields by an oil displacement method.

The liquid level height of the oil well is an important parameter for knowing the liquid supply condition of the oil well and diagnosing the fault of the oil well, can directly reflect the liquid supply condition of a stratum and the underground supply and discharge relation, and is an important index for arranging an oil displacement plan and a production plan in the oil field.

In the traditional management mode, the liquid level of the oil well is measured by using a sound wave method, and the oil well workers need to regularly go to a wellhead for measurement. Generally, the measurement is performed once in about one week, and besides the labor intensity is high, the measurement error is relatively large. The liquid level of the oil well is changed in real time under the influence of factors such as geology and the like, and the liquid level of the oil well cannot be monitored in a traditional mode. In addition, in the traditional mode, an instrument for measuring the height of the oil well is heavy and high in price. Because the liquid level of the oil well cannot be acquired in time, the effect of an oil displacement plan made by an oil field manager according to the regularly measured liquid level is difficult to guarantee, and the yield of the oil well is inevitably influenced.

Disclosure of Invention

In order to solve the problems, the invention provides an intelligent pumping unit for detecting the liquid level, which is arranged at an oil well and can measure and display the liquid level of the oil well in real time, and adopts the following technical scheme:

the invention provides an intelligent pumping unit for detecting liquid level, which is characterized by comprising: the oil pumping device is provided with an oil pumping transmission mechanism and a driving motor, the oil pumping transmission mechanism is connected with the oil well pump and used for controlling the oil well pump to reciprocate so as to pump oil, the oil pumping transmission mechanism comprises a crank, a crank support and an origin detection mechanism, the crank is connected with the crank support and can perform circular motion around a connecting point of the crank and the crank support so as to finally pull the oil well pump connected with the oil pumping transmission mechanism to reciprocate so as to pump oil, the origin detection module is arranged on the crank support and used for sending a pulse signal when the crank rotates to pass through the position of the origin detection module, and the driving motor is connected with the oil pumping transmission mechanism and used for driving the oil pumping transmission mechanism to perform circular reciprocating motion; the oil pumping control device comprises an operation terminal, a frequency converter and a controller, wherein the operation terminal is provided with a picture storage part, a display part, an operation side communication part and an operation side control part, the picture storage part is used for storing a state display picture, the state display picture is provided with a liquid level display area, the display part is used for displaying the state display picture and displaying the liquid level display area in the picture, the operation side communication part is used for carrying out data communication between the operation terminal and the controller, the operation side control part is used for controlling the work of each component part of the operation terminal, the frequency converter is electrically connected with a driving motor, the oil pumping control device is provided with a measuring part, a frequency conversion side communication part and a frequency conversion side control part, the measuring part is used for measuring and acquiring the current value, the current voltage value, the current frequency value and the current power factor value of the current flowing through the driving motor as current electrical parameters, the frequency conversion side communication part sends the electric parameters to the controller, the frequency conversion part is used for adjusting the frequency of the current flowing through the driving motor, the controller is in communication connection with the frequency converter and the operation terminal, and is provided with an indicator diagram storage part, a parameter storage part, a current indicator diagram generation and acquisition part, a stroke acquisition part, a pump efficiency calculation part, a current liquid level calculation part, a control side communication part and a control side control part, the indicator diagram storage part stores the indicator diagram corresponding to the normal working state of the oil pumping action device as a reference indicator diagram, the parameter storage part stores the fixed electric parameters of the driving motor, the transmission parameters of the oil pumping transmission mechanism and the liquid level of the oil well measured and obtained before the oil pumping action device starts to pump oil, and the current indicator diagram generation and acquisition part is used for calculating and acquiring the indicator diagram in the current state as the current liquid level according to the fixed electric parameters, the transmission parameters and the current electric parameters sent by the frequency conversion side communication part after the control side communication part receives the pulse signals The stroke frequency acquisition part calculates according to the received pulse signal and the time of receiving the pulse signal so as to obtain the reciprocating times of the oil well pump per minute as the current stroke frequency, the pump efficiency calculation part calculates the percentage of the loading stroke in one reciprocating stroke of the oil well pump according to the acquired current indicator diagram as the oil pumping efficiency, the current liquid level height calculating part calculates according to the stored liquid level height, the current stroke frequency obtained by calculation and the oil pumping efficiency so as to obtain the actual liquid level height of the oil well as the current liquid level height, once the current liquid level height is obtained, the control side control part controls the control side communication part to send the current liquid level height as liquid level height information to the operation terminal, and the operation side control part controls the display part to display a state display picture according to the liquid level height information received by the operation side communication part and displays the current liquid level height in a liquid level height display area of the picture.

Action and Effect of the invention

According to the intelligent oil pumping unit for detecting the liquid level height, every time the origin detection module detects that the crank rotates for one circle, namely the oil pumping unit completes one reciprocating stroke, the controller calculates according to the current electric parameters obtained by measurement of the frequency converter, the stored fixed electric parameters and the transmission parameters to obtain the indicator diagram corresponding to the reciprocating stroke as the current indicator diagram, then calculates the stroke frequency of reciprocating motion of the oil pumping unit according to the time of the pulse signal sent by the origin detection module, calculates the percentage of the loading stroke in one reciprocating stroke of the oil pumping unit according to the current indicator diagram as the oil pumping efficiency, further calculates according to the stored liquid level height obtained by measurement before oil pumping starts and the obtained current stroke frequency and oil pumping efficiency to obtain the current liquid level height, and finally displays the obtained current liquid level height on the operation terminal. The indicator diagram of the oil well pump is obtained by measuring the electrical parameters of the driving motor, and compared with the traditional method of obtaining the indicator diagram by using a load sensor and a displacement sensor, the oil pumping unit can reduce the influence of the environments such as temperature and humidity on the sensor and improve the accuracy of the obtained indicator diagram. And then, the current liquid level height of the oil well is calculated step by step according to the obtained indicator diagram and is visually displayed, so that the real-time detection of the liquid level height of the oil well is realized, and an oil displacement plan is reasonably arranged in time by an oil field manager according to the current liquid level height of the oil well, thereby improving the production efficiency more efficiently.

Drawings

FIG. 1 is a schematic diagram of the structure of an intelligent pumping unit for detecting liquid level according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an oil pumping action device according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an oil pumping control device according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a frequency converter according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an operation terminal of the embodiment of the present invention;

FIG. 6 is a status display screen of an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a controller according to an embodiment of the present invention;

FIG. 8 is a schematic diagram illustrating a comparison between a current indicator diagram and a reference indicator diagram according to an embodiment of the present invention;

FIG. 9 is a flow chart of the intelligent pumping unit for detecting liquid level height of the embodiment of the present invention for obtaining and displaying the liquid level height;

FIG. 10 is a flow chart of the intelligent pumping unit for detecting liquid level height according to the embodiment of the present invention to adjust pumping efficiency;

FIG. 11 is a flow chart of a fault handling and alarm process in the event of a failure in the pumping process in an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made in conjunction with the accompanying drawings.

As an embodiment, the present invention provides an intelligent pumping unit for detecting liquid level, which is installed at an oil well to perform reciprocating motion on an oil well pump so as to pump oil, and is characterized by comprising: the oil pumping device comprises an oil pumping actuating device and an oil pumping control device, wherein the oil pumping actuating device is provided with an oil pumping transmission mechanism and a driving motor, the oil pumping transmission mechanism is connected with an oil well pump and used for controlling the oil well pump to reciprocate so as to pump oil, the oil pumping transmission mechanism comprises a crank, a crank support and an origin detection mechanism, the crank is connected with the crank support and can perform circular motion around a connecting point of the crank and the crank support so as to finally pull the oil well pump connected with the oil pumping transmission mechanism to reciprocate so as to pump oil, the origin detection module is arranged on the crank support and used for sending a pulse signal when the crank rotates to pass through the position of the origin detection module, and the driving motor is connected with the oil pumping transmission mechanism and used for driving the oil pumping transmission mechanism to perform circular reciprocating motion; the oil pumping control device comprises an operation terminal, a frequency converter and a controller, wherein the operation terminal is provided with a picture storage part, a display part, an operation side communication part and an operation side control part, the picture storage part is stored with a state display picture, the state display picture is provided with a liquid level display area, the display part displays the state display picture and displays the liquid level display area in the picture, the operation side communication part is used for carrying out data communication between the operation terminal and the controller, the operation side control part is used for controlling the work of each component of the operation terminal, the frequency converter is electrically connected with a driving motor, the oil pumping control device is provided with a measuring part, a frequency conversion side communication part and a frequency conversion side control part, the measuring part is used for measuring and acquiring the current value, the current voltage value, the current frequency value and the current power factor value of the current electric parameter of the current flowing through the driving motor, the frequency conversion side communication part sends the electric parameters to the controller, the frequency conversion part is used for adjusting the frequency of the current flowing through the driving motor, the controller is in communication connection with the frequency converter and the operation terminal, and is provided with an indicator diagram storage part, a parameter storage part, a current indicator diagram generation and acquisition part, a stroke acquisition part, a pump efficiency calculation part, a current liquid level calculation part, a control side communication part and a control side control part, the indicator diagram storage part stores the indicator diagram corresponding to the normal working state of the oil pumping action device as a reference indicator diagram, the parameter storage part stores the fixed electric parameters of the driving motor, the transmission parameters of the oil pumping transmission mechanism and the liquid level of the oil well measured and obtained before the oil pumping action device starts to pump oil, and the current indicator diagram generation and acquisition part is used for calculating and acquiring the indicator diagram in the current state as the current liquid level according to the fixed electric parameters, the transmission parameters and the current electric parameters sent by the frequency conversion side communication part after the control side communication part receives the pulse signals The stroke frequency acquisition part calculates according to the received pulse signal and the time of receiving the pulse signal so as to obtain the reciprocating times of the oil well pump per minute as the current stroke frequency, the pump efficiency calculation part calculates the percentage of the loading stroke in one reciprocating stroke of the oil well pump according to the acquired current indicator diagram as the oil pumping efficiency, the current liquid level height calculating part calculates according to the stored liquid level height, the current stroke frequency and the oil pumping efficiency so as to obtain the actual liquid level height of the oil well as the current liquid level height, once the current liquid level height is obtained, the control side control part controls the control side communication part to send the current liquid level height as liquid level height information to the operation terminal, and the operation side control part controls the display part to display a state display picture according to the liquid level height information received by the operation side communication part and displays the current liquid level height in a liquid level height display area of the picture.

In the above-described embodiment, the control unit may further include an offset determination unit that compares the current indicator diagram with the reference indicator diagram to determine whether the current indicator diagram is offset from the reference indicator diagram, wherein if the offset determination unit determines that the current indicator diagram is offset from the reference indicator diagram, the control-side control unit generates an adjustment frequency based on the offset, further controls the control-side communication unit to transmit the adjustment frequency as adjustment information to the frequency conversion-side communication unit, and upon receiving the adjustment information, the frequency conversion-side control unit controls the frequency conversion unit to adjust the frequency of the current flowing through the drive motor based on the adjustment signal to adjust the rotation frequency of the drive motor and adjust the pumping efficiency of the pumping unit.

In the above embodiment, the indicator diagram storage unit may further store a plurality of serious fault indicator diagrams corresponding to a serious fault occurring in the pumping process and corresponding fault names, the controller may further include a fault determination unit and an alarm unit, the input display screen further includes a fault display area, the control-side control unit may control the fault determination unit to determine whether any one of the current indicator diagram and the serious fault indicator diagram is the same or not when the current indicator diagram generation acquisition unit acquires the current indicator diagram, and if so, the control-side control unit may control the control-side communication unit to transmit a serious fault signal to the frequency conversion-side communication unit and simultaneously control the alarm unit to give an alarm and control the control-side communication unit to transmit the fault name corresponding to the serious fault indicator diagram which is the same as the current indicator diagram to the operation terminal as the fault information, when the frequency conversion side communication part receives a serious fault signal, the frequency conversion side control part controls the frequency conversion part to convert the frequency of the current flowing through the driving motor so that the frequency of the current gradually becomes zero, thereby controlling the oil pumping action device to stop working, and when the operation side communication part receives fault information, the operation side control part controls the display part to display a corresponding fault name in a fault display area of an input display picture.

In the above-described embodiment, the controller may further include a failure determination unit, the input display screen further includes a failure display area, the parameter storage unit further stores control frequencies corresponding to the respective slight failure indicator diagrams, the control-side control unit controls the failure determination unit to determine whether any one of the current indicator diagram and the slight failure indicator diagram is the same when the current indicator diagram generation acquisition unit acquires the current indicator diagram, and if it is determined that the control-side control unit controls the control-side communication unit to transmit the control frequency corresponding to the slight failure indicator diagram as slight failure information to the frequency conversion-side communication unit, and the control-side communication unit transmits the failure name corresponding to the slight failure indicator diagram which is the same as the current indicator diagram as the failure information And the frequency conversion side control part controls the frequency conversion part to convert the frequency of the current flowing through the driving motor according to the control frequency once the frequency conversion side communication part receives the slight fault information, and controls the display part to display the corresponding fault name in the fault display area of the input display picture once the operation side communication part receives the fault information.

In the above-described embodiment, the state display screen may further include a stroke frequency display area, a pump efficiency display area, and an indicator diagram display area, the control-side control unit may control the control-side communication unit to transmit the current stroke frequency as the stroke frequency information, the pumping efficiency as the pumping efficiency information, and the current indicator diagram as the indicator diagram information to the operation-side communication unit, and the operation-side control unit may control the display unit to display the corresponding current stroke frequency, pumping efficiency, and current indicator diagram in the stroke frequency display area, the pump efficiency display area, and the indicator diagram display area in the state display screen based on the stroke frequency information, the pumping efficiency information, and the indicator diagram information.

In the above embodiment, the state display screen may further include a start button and a stop button, the variable frequency side control unit may further include a start frequency storage unit in which a preset start frequency is stored, the operation side control unit may control the operation side communication unit to transmit a start signal to the controller when a worker presses the start button, the control side communication unit may transmit the start signal to the variable frequency drive, the variable frequency side control unit may control the variable frequency side communication unit to vary a frequency of a current flowing through the drive motor so that the frequency of the current is equal to the start frequency according to the start frequency, the operation side control unit may control the operation side communication unit to transmit a stop signal to the controller when the worker presses the stop button, the control side communication unit may transmit the stop signal to the variable frequency drive, and the variable frequency side control unit may control the variable frequency side communication unit to vary the frequency of the current flowing through the drive motor so that the frequency of the current gradually becomes zero, thereby controlling the oil pumping action device to stop working.

In the above embodiment, the oil pumping transmission mechanism may further include a walking beam support, a walking beam, a horse head, and a decelerator, wherein the walking beam support is fixedly installed on the ground and used for installing the walking beam, the walking beam reciprocates with a connection point of the walking beam and the walking beam support as a pivot, the walking beam is connected with the crank and reciprocates along with a circular motion of the crank, the horse head is fixedly installed on the walking beam and reciprocates together with the walking beam, one end of the decelerator is connected with the driving motor, and the other end of the decelerator is connected with the crank and used for transmitting a torque of the driving motor and reducing a rotation speed, and the transmission parameters include a transmission ratio of the decelerator, a rotation radius of the crank, a rotation radius of the walking beam, and a vertical stroke of the horse head.

In the above-described embodiment, the fixed electrical parameter may include a rated voltage, a rated frequency, a rated current, the number of poles, a rated power, and a rated rotational speed of the drive motor.

In the above-described embodiment, the control-side communication unit may be configured to generate and acquire the current indicator diagram when receiving the pulse signal transmitted by the origin detection module.

< example >

Fig. 1 is a schematic view of the structure of an intelligent pumping unit for detecting liquid level according to an embodiment of the present invention.

As shown in fig. 1, the present embodiment provides an intelligent pumping unit 100 for detecting liquid level, which is disposed at an oil well and performs reciprocating motion on an oil pump 200 to pump oil.

The intelligent pumping unit 100 for detecting the liquid level comprises an oil pumping action device 1 and an oil pumping control device 2.

One end of the oil pumping action device 1 is connected with the oil pumping control device 2, and the other end is connected with the oil well pump 200 and used for drawing the oil well pump 200 to do reciprocating motion so as to realize oil pumping.

Fig. 2 is a schematic structural diagram of an oil pumping action device according to an embodiment of the present invention.

The oil pumping transmission mechanism 11 is connected with the oil well pump 200 and is used for controlling the oil well pump 200 to perform piston movement so as to realize oil pumping.

The pump jack 11 has a decelerator 111, a crank bracket 112, a crank 113, a walking beam bracket 114, a walking beam 115, a horse head 116, and an origin detection module 117.

The reducer 111 has one end connected to the driving motor 12 and the other end connected to the crank 113, and is configured to transmit the torque of the driving motor 12 to rotate the crank 113 and reduce the rotation speed.

The crank bracket 112 is fixedly mounted on the ground.

The crank 113 is attached to the crank bracket 112 for circular movement about the point of attachment of the crank 113 to the crank bracket 112.

The walking beam support 114 is fixedly connected to the ground.

One end of the walking beam 115 is connected with the crank 113 through a connecting rod, and is connected with the walking beam bracket 114 at a position close to the middle of the walking beam 115, so that the walking beam can reciprocate along with the circular motion of the crank 113 by taking the connecting point of the walking beam 115 and the walking beam bracket 114 as a fulcrum.

The horse head 116 is installed at an end of the walking beam 115 opposite to the position where the crank 113 is connected, and can reciprocate along with the walking beam 115. One end of the horse head 116 is connected to the pump 200 by a pull string (not shown).

The origin detection module 117 is installed on the crank bracket 112 and is in communication connection with the oil pumping control device 2, and the origin detection module 117 sends a pulse signal to the oil pumping control device 2 once every time the crank 113 rotates past the position of the origin detection module 117.

In this embodiment, the origin detection module 117 is a proximity switch, and sends a pulse signal to the pumping control device every time the crank 113 rotates past the position of the proximity switch. In other embodiments, the origin detection module 117 may be other position sensors, and the signals can be sent according to the distance from the crank 113.

The driving motor 12 is connected to the decelerator 111, and is used for driving the decelerator 111 to rotate so as to drive the crank 113 connected to the decelerator 111 to perform a rotational motion, and further drive the walking beam 115 connected to the crank 113 through a connecting rod, the horse head 116 mounted on the walking beam 115, and the oil pump 200 connected to the horse head 116 through a traction rope to perform a reciprocating motion.

In other embodiments, the pump actuator 11 may not have the walking beam 115. The purpose of the invention of output detection and intellectualization can be realized by only an oil pumping transmission mechanism which can drive the oil well pump 200 to reciprocate up and down under the drive of the drive motor 12. The transmission parameters required for calculating the current indicator diagram need to be changed accordingly.

FIG. 3 is a schematic structural diagram of an oil pumping control device according to an embodiment of the present invention.

As shown in FIG. 3, the oil well pumping control device 2 comprises a frequency converter 21, an operation terminal 22, a controller 23, wherein the frequency converter 21 is electrically connected with the driving motor 12, the controller 22 is connected with the frequency converter 21 and the controller 22 is connected with the operation terminal 23 through a communication network 24.

Fig. 4 is a schematic structural diagram of a frequency converter according to an embodiment of the present invention.

As shown in fig. 4, the inverter 21 includes a measurement unit 211, an inverter unit 212, a start frequency storage unit 213, an inverter-side communication unit 214, and an inverter-side control unit 215.

The measuring unit 211 is used to measure and obtain the current value I, the current voltage value U, the current frequency value f and the current power factor value of the current flowing through the driving motor 12

As the current electrical parameter.

The frequency converter 212 is used to adjust the frequency of the current flowing through the driving motor 12, thereby adjusting the rotational frequency of the driving motor 12 and further changing the pumping efficiency of the pumping actuator 1.

The start frequency storage unit 213 stores a preset start frequency, and when the inverter-side communication unit 214 receives the start signal, the inverter-side control unit 215 controls the inverter 212 to convert the current flowing through the drive motor 12 so that the frequency of the current is equal to the start frequency, based on the stored start frequency.

In this embodiment, the frequency conversion process by the frequency conversion unit 212 is performed gradually. The frequency conversion unit 212 gradually changes the frequency of the current passing through the driving motor 12 from zero to equal to the starting frequency according to the starting frequency, so as to reduce the impact of the current on the driving motor 12.

The inverter-side communication unit 214 is used for data communication between the inverter 21 and the controller 23.

The inverter-side control unit 215 includes a computer program for controlling the operation of each component of the inverter 21.

Fig. 5 is a schematic structural diagram of an operation terminal according to an embodiment of the present invention.

As shown in fig. 5, the operation terminal 22 includes a screen storage unit 221, a display unit 222, an operation-side communication unit 223, and an operation-side control unit 224.

FIG. 6 is a status display screen of an embodiment of the present invention.

As shown in fig. 6, the screen storage unit 221 stores a status display screen. The status display screen has a production display area 2211 for displaying daily production, a stroke display area 2212 for displaying current stroke, a pump efficiency display area 2213 for displaying pumping efficiency, a fault display area 2214 for displaying fault name when fault occurs, a indicator diagram display area 2215 for displaying current indicator diagram, a start button 2216 for controlling the pumping unit to start, and a stop button 2217 for controlling the pumping unit to stop.

The display unit 222 displays a status display screen and displays the daily output, the current stroke frequency, the pumping efficiency, the failure name, and the current indicator diagram on the screen to allow the worker to read the operating status of the intelligent pumping unit 100 for output detection. A start button 2216 and a stop button 2217 are simultaneously displayed for a worker to press to control the start and stop of the production testing intelligent pumping unit 100.

Once the worker presses the start button 2216, the operation-side control section 224 controls the operation-side communication section to transmit a start signal to the controller 23, and the controller 23 transmits the start signal to the inverter 21. When the inverter-side control unit receives the start signal, the inverter-side control unit 215 controls the inverter unit 212 to convert the current flowing through the drive motor 12 so that the frequency of the current becomes equal to the start frequency, based on the stored start frequency.

Once the worker presses the start button 2216, the operation-side control section 224 controls the operation-side communication section to send a stop signal to the controller 23, and the controller 23 sends the stop signal to the inverter 21. When the inverter-side control unit receives the stop signal, the inverter-side control unit 215 controls the inverter 212 to invert the current flowing through the drive motor 12 so that the frequency of the current gradually becomes zero, thereby controlling the pumping unit 1 to stop operating.

The operation-side communication unit 223 is used to perform data communication between the operation terminal 22 and the controller 23.

The operation-side control unit 224 includes a computer program for controlling the operations of the respective components of the operation terminal 22.

Fig. 7 is a schematic structural diagram of a controller according to an embodiment of the present invention.

As shown in fig. 7, the controller 23 includes a indicator diagram storage unit 231, a parameter storage unit 232, a current indicator diagram generation acquisition unit 233, a failure determination unit 234, an offset determination unit 235, a stroke acquisition unit 236, a pump efficiency calculation unit 237, a current liquid level height calculation unit 238, an alarm unit 239, a control-side communication unit 240, and a control-side control unit 241.

The indicator diagram storage unit 231 stores an indicator diagram corresponding to the normal operating state of the pumping operation device 1 as a reference indicator diagram, a plurality of serious failure indicator diagrams corresponding to serious failures occurring in the pumping process and corresponding failure names, and a plurality of slight failure indicator diagrams corresponding to slight failures occurring in the pumping process and corresponding failure names.

In this embodiment, the serious failure indicator diagram includes an indicator diagram that if the oil pumping operation device 1 continues to pull the oil pumping unit 200 to continue operating, the serious consequence of which causes serious economic loss, such as leakage of the oil pumping unit 200, serious abrasion or breakage of the oil pumping unit 200, and the like.

In this embodiment, the minor fault indicator diagram includes an indicator diagram that if the pumping action device 1 continues to pull the oil pump 200 to continue to operate, the minor fault indicator diagram will not cause serious consequences, such as excessive gas in the oil well and sand in the oil well. Because the time consumed by the shutdown inspection and maintenance of the pumping unit is long, two to three days are generally needed, and if a fault corresponding to a slight fault indicator diagram occurs, the oil pumping action control device 1 stops pumping oil, which may cause greater economic loss.

The parameter storage unit 232 stores therein the transmission parameters of the pumping actuator 11, the fixed electrical parameters of the driving motor 12, the level of the oil in the oil well measured by the worker before the pumping operation device 1 starts pumping, and the control frequency corresponding to the light failure indicator diagram.

In this embodiment, the transmission parameters include the gear ratio of the decelerator 111, the rotation radius of the walking beam 115, the rotation radius of the crank 113, and the vertical stroke of the horse head 113. The fixed electrical parameters include the rated voltage, rated frequency, rated current, pole count, rated power, rated speed, highest frequency, and lowest frequency of the drive motor 12.

In other embodiments, depending on the components of the oil well actuator 11, the stored actuator parameters should include parameters corresponding to the oil well actuator 11.

In this embodiment, the stored liquid level is obtained by measuring the liquid level of the oil well by a worker using a measuring instrument when the intelligent pumping unit 100 for detecting liquid level of the present invention has not been started to pump oil. Before the pumping unit 100 is started and the liquid level is stored in the parameter storage section 232 of the controller 23.

In another embodiment, the screen storage unit 221 may store a liquid level setting screen. In this screen, the liquid level obtained by the measurement is input and confirmed by the worker. Once the worker completes the confirmation of the inputted liquid level height, the operation-side control section 224 controls the operation-side communication section 223 to transmit the liquid level height to the controller 23, which is stored by the parameter storage section 232.

The current indicator diagram generation and acquisition unit 233 calculates and acquires the indicator diagram in the current state as the current indicator diagram based on the fixed electrical parameters and the transmission parameters stored in the parameter storage unit 232 and the current electrical parameters measured by the measurement unit 211 of the frequency converter 21.

Upon acquiring the current indicator diagram, the control-side control unit 241 controls the control-side communication unit 240 to transmit the current indicator diagram as indicator diagram information to the operation-side communication unit 223 of the operation terminal 22. When the operation-side communication unit receives the indicator diagram information, the operation-side control unit 224 controls the display unit 222 to display the current indicator diagram in the indicator diagram display area 2215 of the input display screen.

In this embodiment, the current value I, the current voltage value U and the current power factor value in the current electrical parameter are determined

The active power P of the driving motor 12 is obtained by calculation, and the calculation formula is:

calculating and obtaining the torque T of the driving motor 12 according to the current frequency value f, wherein the calculation formula is as follows:

the torque T obtained by calculation is the load on the ordinate in the indicator diagram.

In other embodiments, because the factors affecting the load also include parameters of the drive motor 12 itself and the efficiency of the oil pumping transmission mechanism, the load is calculated by considering the influence of the fixed electrical parameters and the transmission parameters, and the calculation process is more complicated.

In this embodiment, when the driving motor 12 drives the reducer 114 and the crank connected to the reducer 114 to rotate, any position where the crank rotates corresponds to any position where the horse head 113 connected to the walking beam pulls the oil well pump to reciprocate one by one. Obtained from the measuring part 211Current voltage value U, power factor value before point

And setting the stroke of the oil well pump 200 at the lowest point to be 0, and calculating to obtain the stroke of the oil well pump 200 corresponding to the load in the current state. And finally, generating a current indicator diagram according to the obtained load and stroke.

The failure determination unit 234 is configured to determine whether the current indicator diagram is identical to any one of the stored serious failure indicator diagram and the stored light failure indicator diagram.

When the fault is identical to any of the critical fault indicator diagrams, the control-side control unit 241 controls the control-side communication unit 240 to transmit a critical fault signal to the inverter-side communication unit 214, controls the alarm unit 239 to issue an alarm, and controls the control-side communication unit 240 to transmit a fault name corresponding to the critical fault indicator diagram identical to the current indicator diagram to the operation-side communication unit 223 as fault information.

When the frequency conversion side communication unit 214 receives the serious failure signal, the frequency conversion side control unit 215 controls the frequency conversion unit 212 to convert the frequency of the current flowing through the drive motor 12 so that the frequency of the current gradually becomes zero, thereby controlling the pumping operation device 1 to stop operating.

When the operation-side communication unit 223 receives the trouble information, the operation-side control unit 224 controls the display unit 222 to display the corresponding trouble name in the trouble display area 2213 on the input display screen.

In this embodiment, the warning unit 239 is a red warning lamp, and the control-side control unit 241 controls the warning unit 239 to give a warning, that is, the red warning lamp is turned on. In another embodiment, the alarm unit may be a buzzer for giving an alarm by giving a buzzer.

When the detected signal is identical to any one of the light failure indicator diagrams, the control-side control unit 241 controls the control-side communication unit 240 to transmit the control frequency corresponding to the light failure indicator diagram to the inverter-side communication unit 214 as light failure information, controls the control-side communication unit 240 to transmit the failure name corresponding to the serious failure indicator diagram identical to the current indicator diagram to the operation-side communication unit 223 as failure information,

when the inverter-side communication unit 214 receives the slight failure information, the inverter-side control unit 215 controls the inverter unit 212 to convert the current flowing through the drive motor 12 according to the corresponding control frequency.

In this embodiment, the control frequency is lower than the current frequency value of the current flowing through the driving motor, so that the loss caused by slight fault can be reduced by reducing the number of times of pumping by the pumping action device 1 to pull the oil well pump 200.

Fig. 8 is a schematic diagram illustrating a comparison between a current indicator diagram and a reference indicator diagram according to an embodiment of the present invention.

As shown in fig. 8, the offset determination unit 235 is configured to compare the current indicator diagram with the reference indicator diagram and determine whether the current indicator diagram is offset from the reference indicator diagram. When it is determined that there is an offset, the control-side control unit 241 generates an adjustment frequency from the offset and controls the control-side communication unit 240 to transmit the adjustment frequency to the inverter-side communication unit 214 as an adjustment signal.

In this embodiment, the current indicator diagram obtained by calculation is shown as a black implementation in the diagram, and the reference indicator diagram is shown as a gray solid line in the diagram. It can be seen from the figure that the curve of the AB segment of the reference indicator diagram does not coincide with the curve of the a 'B' segment of the current indicator diagram, and there is an offset between the two.

The stroke frequency acquiring unit 236 is configured to calculate the number of times that the oil pump reciprocates per minute as the current stroke frequency according to the pulse signal sent by the origin detecting module 117 and the time when the pulse signal is received.

In this embodiment, the origin detection module 117 sends a pulse signal every time, which indicates that the crank 113 completes one rotation, i.e. the oil pumping transmission mechanism 11 completes one stroke. Each time the control-side communication unit 240 receives a pulse signal transmitted from the origin detection module 117 once, the control-side control unit 241 controls the current indicator diagram generation/acquisition unit 234 to generate one current indicator diagram.

In other embodiments, the origin detection module 117 may be a distance sensor. The distance sensor transmits a detection signal to the oil pumping control side communication unit 240 based on the detected distance from the crank 113. The control-side control unit 241 determines whether the crank 113 has completed one rotation based on the received detection signal, and controls the current indicator diagram generation/acquisition unit 234 to generate one current indicator diagram when it is determined that the rotation is completed one rotation.

Upon acquiring the current stroke count, the control-side controller 241 controls the control-side communicator 240 to transmit the current stroke count as stroke count information to the operation-side communicator 223 of the operation terminal 22. When the operation-side communication unit receives the stroke information, the operation-side control unit 224 controls the display unit 222 to display the current stroke in the stroke display area 2212 of the input display screen.

In this other embodiment, the controller 23 may further include an accumulated lifting frequency acquiring unit configured to perform accumulated calculation based on the received pulse signal to acquire an accumulated lifting frequency of the oil pump 200. And at the same time, the cumulative number of lifts is displayed in a region corresponding to the state display screen displayed on the display unit 222 of the operation terminal 22. The status display screen may also have a reset button. Once the worker presses the reset button, the controller 23 clears the cumulative lift number of the oil pump 200 cumulatively calculated by the cumulative lift number obtaining portion.

The pump efficiency calculation unit 237 calculates the percentage of the total stroke of the oil pump 200 in one reciprocating stroke based on the current indicator diagram as the pumping efficiency.

Once the pumping efficiency is acquired, the control-side control unit 241 controls the control-side communication unit 240 to transmit the pumping efficiency as pump efficiency information to the operation-side communication unit 223 of the operation terminal 22. When the operation-side communication unit receives the pumping efficiency, the operation-side control unit 224 controls the display unit 222 to display the pumping efficiency in the pumping efficiency display area 2213 on the input display screen.

The current liquid level calculation section 238 performs calculation based on the stored liquid level, the calculated current stroke frequency, and the pumping efficiency to obtain the actual liquid level of the oil well as the current liquid level.

Upon acquiring the current liquid level, the control-side control unit 241 controls the control-side communication unit 240 to transmit the front liquid level as liquid level information to the operation-side communication unit 223 of the operation terminal 22. When the operation-side communication unit receives the liquid level height information, the operation-side control unit 224 controls the display unit 222 to display the current liquid level height in the liquid level height display area 2211 of the input display screen.

The control-side communication unit 240 is used to perform data communication between the controller 23 and the operation terminal 22 and between the controller 23 and the inverter 21.

And the control-side control section 241 contains a computer program for controlling the operations of the controller 23 and the respective constituent elements.

Fig. 9 is a flow chart of the intelligent pumping unit for detecting liquid level height according to the embodiment of the invention for obtaining and displaying the liquid level height.

As shown in fig. 9, the process of acquiring and displaying the liquid level by the intelligent pumping unit 100 for detecting the liquid level is as follows:

step S1, after the worker presses the start button 2216, the operation side control unit 224 controls the operation side communication unit 223 to send a start signal to the controller 23, then the control side control unit 241 controls the control side communication unit 240 to send the start signal to the frequency converter 21, then the frequency conversion side control unit 215 controls the frequency conversion unit 212 to convert the frequency of the current flowing through the driving motor 12 according to the start frequency so that the frequency of the current is gradually increased from zero to be equal to the start frequency to make the pumping action mechanism 1 start to draw the pump to pump, and then the process proceeds to step S2;

step S2, the measuring section 211 measures and acquires the current value, the current voltage value, the current frequency value, and the current power factor value of the current flowing through the driving motor 12 as the current electrical parameters, and the inverter-side control section 215 controls the inverter-side communication section 214 to transmit the acquired current electrical parameters to the controller 23, and then proceeds to step S3;

step S3, the current indicator diagram generation and acquisition unit 233 calculates the received current electrical parameter and the stored fixed electrical parameter and transmission parameter to acquire the current indicator diagram, and then the control-side control unit 241 controls the control-side communication unit 240 to send the acquired current indicator diagram to the operation terminal 22 as indicator diagram information, and then the process proceeds to step S4;

step S4, the stroke frequency obtaining unit 236 obtains the number of times of reciprocating the oil pump 200 per minute as the current stroke frequency by performing the calculation based on the received pulse signal and the time of receiving the pulse signal, and the control-side control unit 241 controls the control-side communication unit 240 to transmit the obtained current stroke frequency as the stroke frequency information to the operation terminal 22, and then the process proceeds to step S5;

step S5, the pump efficiency calculating unit 237 calculates the percentage of the total stroke of the oil pump 200 during one reciprocating stroke according to the obtained current indicator diagram as the pumping efficiency, then the control side control unit 241 controls the control side communication unit 240 to send the obtained pumping efficiency as the pump efficiency information to the operation terminal 22, and then the process goes to step S6;

step S6, the current liquid level calculation unit 238 calculates the actual liquid level of the oil well as the current liquid level based on the stored liquid level and the obtained current stroke and pumping efficiency, and then the control-side control unit 241 controls the control-side communication unit 240 to send the obtained current liquid level as liquid level information to the operation terminal 22, and then proceeds to step S7;

in step S7, the display unit 222 displays a status display screen, displays the current indicator diagram, the current stroke count, the pumping efficiency, and the current liquid level in the corresponding area, and enters the end state.

FIG. 10 is a flow chart of the intelligent pumping unit for detecting liquid level to adjust pumping efficiency according to the embodiment of the present invention.

In step T1, the fault determining unit 234 compares the acquired current indicator diagram with a plurality of stored serious fault indicator diagrams and a plurality of stored slight fault indicator diagrams, determines whether the current indicator diagram is the same as any one of the serious fault indicator diagrams or the slight fault indicator diagrams, and if the current indicator diagram is the same as any one of the serious fault indicator diagrams or the slight fault indicator diagrams, the step T2 is performed, and if the current indicator diagram is different from any one of the serious fault indicator diagrams or the slight fault indicator diagrams, the step T2 is performed, and the step T3 is performed;

step T2, performing a fault alarm process, and then entering an end state;

step T3, the deviation judging part judges whether the obtained current indicator diagram has deviation relative to the generated reference indicator diagram, if the judgment is no, the terminal state is entered, if the judgment is yes, the step T4 is entered;

step T4, the control-side control unit 241 generates an adjustment frequency from the obtained offset of the current indicator diagram with respect to the generated reference indicator diagram, further controls the control-side communication unit 240 to transmit the adjustment frequency to the frequency converter 21, and then proceeds to step T5;

in step T5, the frequency conversion side control unit 215 controls the frequency conversion unit 212 to adjust the frequency of the current flowing through the drive motor 12 according to the adjustment frequency, thereby adjusting the pumping efficiency of the pumping operation device 1, and then enters the end state.

Step E1, the failure determination unit 234 determines which failure indicator diagram is the same as the current indicator diagram, if the failure determination unit 235 determines that the current indicator diagram is the same as the serious failure indicator diagram, the process proceeds to step E2, and if the failure determination unit 235 determines that the current indicator diagram is the same as the light failure indicator diagram, the process proceeds to step E4;

step E2, the control side controller 241 controls the alarm 239 to send an alarm, and the control side communicator 240 sends a serious fault signal to the frequency conversion side communicator 213, and then the process goes to step E3;

step E3, the frequency conversion side control unit 214 controls the frequency conversion unit 212 to convert the frequency of the current flowing through the driving motor 12 so that the frequency of the current gradually becomes zero, thereby controlling the pumping operation device 1 to stop working, and then the process proceeds to step E6;

step E4, the control side control part 241 controls the control side communication part 240 to send the control frequency corresponding to the same minor failure indicator diagram as the current indicator diagram stored in the parameter storage part to the frequency conversion side communication part as minor failure information, and then proceeds to step E5;

step E5, the frequency conversion side control unit 214 controls the frequency conversion unit 212 to convert the frequency of the current flowing through the driving motor 12 according to the corresponding control frequency, and then the process goes to step E6;

step E6, the control-side control section 241 controls the control-side communication section 240 to transmit the failure name corresponding to the serious failure indicator diagram or the slight failure indicator diagram to the operation-side communication section 223 as failure information, and then proceeds to step E7;

in step E7, the operation-side control unit 224 controls the display unit 222 to display the corresponding trouble name in the trouble display area 2213 on the input display screen, and then enters the end state.

Examples effects and effects

According to the intelligent oil pumping unit for detecting the liquid level height, every time the origin detection module detects that the crank rotates for one circle, namely the oil pumping unit completes one reciprocating stroke, the controller calculates according to the current electric parameters obtained by measurement of the frequency converter, the stored fixed electric parameters and the transmission parameters to obtain the indicator diagram corresponding to the reciprocating stroke as the current indicator diagram, then calculates the stroke frequency of reciprocating motion of the oil pumping unit according to the time of the pulse signal sent by the origin detection module, calculates the percentage of the loading stroke in one reciprocating stroke of the oil pumping unit according to the current indicator diagram as the oil pumping efficiency, further calculates according to the stored liquid level height obtained by measurement before oil pumping starts and the obtained current stroke frequency and the oil pumping efficiency to obtain the current liquid level height, and finally displays the obtained current liquid level height on the operation terminal. The indicator diagram of the oil well pump is obtained by measuring the electrical parameters of the driving motor, and compared with the traditional method of obtaining the indicator diagram by using a load sensor and a displacement sensor, the oil pumping unit can reduce the influence of the environments such as temperature and humidity on the sensor and improve the accuracy of the obtained indicator diagram. And then, the current liquid level height of the oil well is calculated step by step according to the obtained indicator diagram and is visually displayed, so that the real-time detection of the liquid level height of the oil well is realized, and an oil displacement plan is reasonably arranged in time by an oil field manager according to the current liquid level height of the oil well, thereby improving the production efficiency more efficiently.

According to the intelligent oil pumping unit for detecting the liquid level height, provided by the embodiment, the operation terminal can visually display the current indicator diagram, the current stroke frequency, the oil pumping efficiency and the current liquid level height obtained by calculation, so that workers in an oil field can understand the operation condition of the oil pumping unit in an express way and can arrange a production plan reasonably according to the operation condition.

According to the intelligent pumping unit for detecting the liquid level height provided by the embodiment, the frequency of the driving motor is adjusted based on the current indicator diagram so as to control the pumping efficiency of the oil well pump, and the frequency of the current of the driving motor is adjusted according to the offset generated after the current indicator diagram is compared with the reference indicator diagram so as to adjust the frequency, so that the efficiency of the oil well pump is finally adjusted. The intelligent operation of the oil pumping unit is realized, the labor force requirement is reduced, and the realization of large-scale intelligent operation of the oil field is facilitated.

According to the intelligent oil pumping unit for detecting the liquid level height, the current indicator diagram and the serious fault indicator diagram are compared by the fault judging part to judge whether the current indicator diagram and the serious fault indicator diagram are the same or not, further, when the judgment result is yes, a red alarm lamp of the alarm part is turned on, a corresponding fault name is displayed on an operation terminal, and meanwhile, the frequency of current flowing through the driving motor is adjusted to be zero so that the oil pumping action device is controlled to stop drawing an oil pumping pump. Therefore, when serious faults occur in the production process, the production can be stopped in time, and the greater economic loss is avoided. Meanwhile, the worker is prompted to stop due to serious faults of the pumping unit through an obvious red alarm lamp, and the pumping unit needs to be maintained as soon as possible.

According to the intelligent oil pumping machine for detecting the liquid level height, the current indicator diagram and the slight fault indicator diagram are compared through the fault judging part to judge whether the current indicator diagram and the slight fault indicator diagram are the same or not, and further, when the judgment is yes, the corresponding fault name is displayed on the operation terminal, and meanwhile, the frequency of current flowing through the driving motor is adjusted according to the corresponding control frequency, so that the frequency of stroke of the oil pumping action device for drawing the oil pumping pump to pump oil is reduced. Due to the reduction of the stroke frequency, the loss caused by continuous production of the oil pumping unit without stopping under slight fault is reduced. Because the time required for stopping and maintaining is long, generally two to three days, the pumping action device is not controlled to stop working when a slight fault occurs, so that the larger economic loss can be avoided. And through the display of the operating terminal on the fault name, workers can intuitively know the fault content of the oil pumping unit, and regular maintenance and inspection can be conveniently arranged.

The above-described embodiments are merely illustrative of specific embodiments of the present invention, and the present invention is not limited to the description of the above-described embodiments.

Claims

1. The utility model provides a liquid level height detects intelligent beam-pumping unit, thereby sets up and realizes pumping at oil well department through carrying out reciprocating motion to the oil-well pump, its characterized in that includes:

an oil pumping action device and an oil pumping control device,

wherein the oil pumping action device is provided with an oil pumping transmission mechanism and a driving motor,

the oil pumping transmission mechanism is connected with the oil well pump and is used for controlling the oil well pump to reciprocate so as to realize oil pumping,

the oil pumping transmission mechanism comprises a crank, a crank bracket and an origin detection module,

the crank is connected with the crank bracket and can do circular motion around the connecting point of the crank and the crank bracket so as to finally draw the oil well pump connected with the oil pumping transmission mechanism to do reciprocating motion so as to realize the oil pumping,

the origin detection module is arranged on the crank bracket and used for sending a pulse signal when the crank rotates to pass through the position of the origin detection module,

the driving motor is connected with the oil pumping transmission mechanism and is used for driving the oil pumping transmission mechanism to reciprocate;

the oil pumping control device is provided with an operation terminal, a frequency converter and a controller,

the operation terminal has a screen storage unit, a display unit, an operation-side communication unit, and an operation-side control unit,

the picture storage part stores a state display picture,

the state display picture has a liquid level height display area,

the display unit displays the state display screen and displays the liquid level display area on the screen,

the operation-side communication section is configured to perform data communication between the operation terminal and the controller,

the operation-side control unit controls operations of the screen storage unit, the display unit, and the operation-side communication unit,

the frequency converter is electrically connected with the driving motor and is provided with a measuring part, a frequency conversion side communication part and a frequency conversion side control part,

the measuring part is used for measuring and acquiring the current value, the current voltage value, the current frequency value and the current power factor value of the current flowing through the driving motor as the current electrical parameters,

the frequency conversion side communication part sends the current electrical parameter to the controller,

the frequency conversion part is used for adjusting the frequency of the current flowing through the driving motor,

the controller is in communication connection with the frequency converter and the operation terminal, and is provided with a indicator diagram storage part, a parameter storage part, a current indicator diagram generation and acquisition part, a stroke frequency acquisition part, a pump efficiency calculation part, a current liquid level height calculation part, a control side communication part and a control side control part,

the indicator diagram storage part stores the indicator diagram corresponding to the normal working state of the oil pumping action device as a reference indicator diagram,

the parameter storage part stores fixed electric parameters of the driving motor, transmission parameters of the oil pumping transmission mechanism and the measured liquid level of the oil in the oil well before the oil pumping action device starts to pump oil,

the current indicator diagram generation and acquisition part is used for calculating and acquiring the indicator diagram in the current state as the current indicator diagram according to the fixed electrical parameter, the transmission parameter and the current electrical parameter sent by the frequency conversion side communication part after the control side communication part receives the pulse signal,

the stroke frequency acquisition part calculates according to the received pulse signal and the time of receiving the pulse signal so as to obtain the reciprocating motion frequency of the oil well pump per minute as the current stroke frequency,

the pump efficiency calculating part calculates the percentage of the loaded stroke in one reciprocating stroke of the oil well pump to the total stroke according to the obtained current indicator diagram as the oil pumping efficiency,

the current liquid level height calculating part calculates according to the stored liquid level height, the obtained current stroke frequency and the oil pumping efficiency so as to obtain the actual liquid level height of the oil well as the current liquid level height,

and once the current liquid level height is obtained, the control side control part controls the control side communication part to send the current liquid level height to the operation terminal as liquid level height information, and the operation side control part controls the display part to display the state display picture according to the liquid level height information received by the operation side communication part and displays the current liquid level height in the liquid level height display area of the picture.

2. The intelligent oil pumping unit for detecting the liquid level according to claim 1, characterized in that:

wherein the control unit further comprises an offset determination unit,

the offset judging part is used for comparing the current indicator diagram with the reference indicator diagram and judging whether the current indicator diagram has offset relative to the reference indicator diagram,

if it is determined that the offset is greater than the predetermined offset, the control-side communication unit generates an adjustment frequency based on the offset, and further controls the control-side communication unit to transmit the adjustment frequency as adjustment information to the inverter-side communication unit,

once the frequency conversion side communication part receives the adjustment information, the frequency conversion side control part controls the frequency conversion part to adjust the frequency of the current flowing through the driving motor according to the adjustment information, so as to adjust the rotation frequency of the driving motor and realize the adjustment of the oil pumping efficiency of the oil pumping action device.

3. The intelligent oil pumping unit for detecting the liquid level according to claim 1, characterized in that:

wherein, the indicator diagram storage part also stores a plurality of corresponding serious failure indicator diagrams when serious failures occur in the oil pumping process, and correspondingly stores corresponding failure names,

the controller further has a failure determination section and an alarm section,

the status display screen also has a fault display area,

once the current indicator diagram generation and acquisition part acquires the current indicator diagram, the control-side control part controls the fault judgment part to judge whether the current indicator diagram is the same as any one of the serious fault indicator diagrams, if so, the control-side control part controls the control-side communication part to send a serious fault signal to the frequency conversion-side communication part, controls the alarm part to give an alarm, and controls the control-side communication part to send the fault name corresponding to the serious fault indicator diagram which is the same as the current indicator diagram to the operation terminal as fault information,

when the frequency conversion side communication part receives the serious fault signal, the frequency conversion side control part controls the frequency conversion part to convert the frequency of the current flowing through the driving motor so that the frequency of the current gradually becomes zero, thereby controlling the oil pumping action device to stop working,

when the operation-side communication unit receives the trouble information, the operation-side control unit controls the display unit to display the corresponding trouble name in the trouble display area of the status display screen.

4. The intelligent oil pumping unit for detecting the liquid level according to claim 1, characterized in that:

wherein, the indicator diagram storage part also stores a plurality of indicator diagrams corresponding to slight faults in the oil pumping process as the slight fault indicator diagrams and correspondingly stores corresponding fault names,

the controller is also provided with a fault judgment section,

the status display screen also has a fault display area,

the parameter storage part is also stored with control frequency corresponding to each slight fault indicator diagram,

once the current indicator diagram generation and acquisition unit acquires the current indicator diagram, the control-side control unit controls the fault determination unit to determine whether the current indicator diagram is the same as any one of the light fault indicator diagrams, and if so, the control-side control unit controls the control-side communication unit to send the control frequency corresponding to the light fault indicator diagram as light fault information to the frequency conversion-side communication unit, and controls the control-side communication unit to send the fault name corresponding to the light fault indicator diagram that is the same as the current indicator diagram as fault information to the operation terminal,

the variable frequency side control section controls the variable frequency section to frequency-convert the current flowing through the drive motor according to the control frequency upon the variable frequency side communication section receiving the minor failure information,

5. The intelligent oil pumping unit for detecting the liquid level according to claim 1, characterized in that:

wherein the state display picture also comprises a stroke display area, a pump effect display area and an indicator diagram display area,

the control side control part controls the control side communication part to take the current stroke frequency as stroke frequency information, the oil pumping efficiency as pump efficiency information and the current indicator diagram as indicator diagram information to be sent to the operation side communication part, and the operation side control part controls the display part to display the corresponding current stroke frequency, oil pumping efficiency and current indicator diagram in the stroke frequency display area, the pump efficiency display area and the indicator diagram display area in the state display picture according to the stroke frequency information, the pump efficiency information and the indicator diagram information.

6. The intelligent oil pumping unit for detecting the liquid level according to claim 1, characterized in that:

wherein the state display screen further has a start button and a stop button,

the frequency conversion side control part is also provided with a starting frequency storage part,

the starting frequency storage part stores preset starting frequencies,

when a worker presses the start button, the operation side control part controls the operation side communication part to send a start signal to the controller, the control side communication part sends the start signal to the frequency converter, the frequency conversion side control part controls the frequency conversion part to convert the frequency of the current flowing through the driving motor according to the start frequency so that the frequency of the current is equal to the start frequency,

when the worker presses the stop button, the operation side control part controls the operation side communication part to send a stop signal to the controller, the control side communication part sends the stop signal to the frequency converter, and the frequency conversion side control part controls the frequency conversion part to convert the frequency of the current flowing through the driving motor to gradually become zero, so that the oil pumping action device is controlled to stop working.

7. The intelligent oil pumping unit for detecting the liquid level according to claim 1, characterized in that:

wherein the oil pumping transmission mechanism is also provided with a walking beam bracket, a walking beam, a horse head and a speed reducer,

the walking beam bracket is fixedly arranged on the ground and used for mounting the walking beam, the walking beam reciprocates by taking the connecting point of the walking beam and the walking beam bracket as a fulcrum,

the walking beam is connected with the crank and reciprocates along with the circular motion of the crank,

the horse head is fixedly arranged on the walking beam and reciprocates together with the walking beam,

one end of the speed reducer is connected with the driving motor, the other end of the speed reducer is connected with the crank and is used for transmitting the torque of the driving motor and reducing the rotating speed,

the transmission parameters comprise the transmission ratio of the reducer, the rotation radius of the crank, the rotation radius of the walking beam and the vertical stroke of the horse head.

8. The intelligent oil pumping unit for detecting the liquid level according to claim 1, characterized in that:

wherein the fixed electrical parameters include a rated voltage, a rated frequency, a rated current, a pole number, a rated power and a rated rotation speed of the driving motor.

9. The intelligent oil pumping unit for detecting the liquid level according to claim 1, characterized in that:

wherein, once the control-side communication unit receives the pulse signal sent by the origin detection module, the current indicator diagram generation and acquisition unit generates and acquires the current indicator diagram.