CN113890418B - Starting circuit structure, connecting circuit and starting method of movable oil pumping unit - Google Patents
Starting circuit structure, connecting circuit and starting method of movable oil pumping unit Download PDFInfo
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- CN113890418B CN113890418B CN202010632112.4A CN202010632112A CN113890418B CN 113890418 B CN113890418 B CN 113890418B CN 202010632112 A CN202010632112 A CN 202010632112A CN 113890418 B CN113890418 B CN 113890418B
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- 238000005086 pumping Methods 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000000670 limiting effect Effects 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims description 24
- 230000008569 process Effects 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/26—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/02—Details
- H02P1/04—Means for controlling progress of starting sequence in dependence upon time or upon current, speed, or other motor parameter
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention provides a starting circuit structure, a connecting circuit and a starting method of a movable oil pumping unit. The starting circuit structure of the movable pumping unit comprises: the motor of the pumping unit is communicated with the power supply circuit through the change-over switch; the first circuit row group, the quick connector, the second circuit row group, the variable frequency control device, the starting regulation control module, the third circuit row group, the quick connector, the safety switch and the fourth circuit row group are connected in sequence to form a starting loop, and the starting loop and the power circuit are arranged in parallel; the change-over switch is communicated with the power circuit or the first line bank, the starting regulation control module is electrically connected with the variable frequency control device and the change-over switch, and the safety switch is used for conducting or disconnecting the quick connector with the fourth line bank; and the electromagnetic limiting device is arranged on one side or two sides of the quick connector and is electrically connected with the starting regulation control module. The invention solves the problems of low motor operation efficiency and high electric energy loss of the pumping unit in the prior art.
Description
Technical Field
The invention relates to the field of pumping units, in particular to a starting circuit structure, a connecting circuit and a starting method of a movable pumping unit.
Background
The pumping unit is the main oil extraction equipment in China, has the advantages of simple structure, reliability, durability and the like, and is widely used in various large oil fields. Because of the structural characteristics, the static load moment is larger when the pumping unit is started, and the capacity of a common motor is increased only for overcoming the static load moment of a load during starting, so that the phenomenon of 'big maraca' is caused. When the motor is in a 'large maraca' state, the running efficiency of the motor is low, the proportion of consumed idle work is increased, the electric energy loss is increased, and the capacity of a corresponding matched transformer is increased.
The load rate of the motor is the highest about 75%, and the efficiency change is less in the range of 50% -100%. When the motor is in the optimal load rate state to operate, the power factor is maximum, and the operation efficiency is highest. At present, the average load rate of most oil pumping machine motors is less than 40%, and the running efficiency of the motors is less than 80%.
Disclosure of Invention
The invention mainly aims to provide a starting circuit structure, a connecting circuit and a starting method of a movable pumping unit, so as to solve the problems of low motor operation efficiency and high electric energy loss of the pumping unit in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a starting circuit structure of a mobile pumping unit, characterized in that the starting circuit structure of the mobile pumping unit includes: the change-over switch is used for switching on the motor of the pumping unit with the power circuit; the first circuit row group, the quick connector, the second circuit row group, the variable frequency control device, the starting regulation control module, the third circuit row group, the quick connector, the safety switch and the fourth circuit row group are connected in sequence to form a starting loop, and the starting loop and the power circuit are arranged in parallel; the safety switch selectively conducts or disconnects the quick connector and the fourth line bank group so as to conduct or disconnect the starting loop; and the electromagnetic limiting device is arranged on one side or two sides of the quick connector and is electrically connected with the starting regulation control module.
Further, the starting circuit structure of the movable pumping unit further comprises a rotating speed sensor, the rotating speed sensor is electrically connected with the motor and used for reading the rotating speed of the motor, the rotating speed sensor is electrically connected with the starting regulation control module, and when the rotating speed of the motor reaches the preset rotating speed, the starting regulation control module sends a switching instruction to the change-over switch and simultaneously turns off the switch of the variable frequency control device.
Further, the starting regulation control module is electrically connected with the rotating speed sensor and the change-over switch through the quick connector.
Further, the first line bank group, the second line bank group, the third line bank group and the power circuit are all three-phase circuits.
Further, the change-over switch is provided with a power frequency position and a variable frequency position, and when the change-over switch is positioned at the power frequency position, the motor is communicated with the power circuit; when the change-over switch is positioned at the frequency conversion position, the motor is communicated with the first line bank.
According to another aspect of the invention, a connection circuit of a mobile pumping unit is provided, and the connection circuit of the mobile pumping unit comprises the starting circuit structure of the mobile pumping unit.
According to another aspect of the present invention, there is provided a method for starting a mobile pumping unit, which is implemented by using the above-mentioned starting circuit structure of the mobile pumping unit, and includes: switching on a change-over switch of a starting circuit structure of the movable pumping unit and a first line bank of the starting circuit structure of the movable pumping unit so as to enable a variable frequency control device of the starting circuit structure of the movable pumping unit to be put into use; closing a safety switch of a starting circuit structure of the movable pumping unit to conduct a starting loop of the starting circuit structure of the movable pumping unit; closing a switch of a power circuit, and starting a motor of the pumping unit; when the rotating speed of the motor of the pumping unit reaches a preset rotating speed, disconnecting the change-over switch from the first line bank, and directly conducting the change-over switch with the power circuit; the safety switch is opened.
Further, when the rotation speed of the motor of the pumping unit reaches the set rotation speed, disconnecting the change-over switch from the first line bank and directly conducting the change-over switch with the power circuit comprises the following steps: the rotating speed sensor of the starting circuit structure of the movable pumping unit transmits the rotating speed of the motor to the starting regulation control module of the starting circuit structure of the movable pumping unit; when the rotating speed of the motor reaches the preset rotating speed, the starting regulation control module sends a switching instruction to the change-over switch, and the change-over switch is disconnected with the first line bank and is directly connected with the power circuit, and meanwhile, the switch of the variable frequency control device is disconnected.
By applying the technical scheme of the invention, the reason that the power of the matching motor of the pumping unit is large is that the pumping unit is started under load and the load is uneven. The motor of the pumping unit is connected with the first circuit bank through the change-over switch when the motor is started, so that the motor is communicated with the starting circuit, when current passes through the frequency conversion device, the frequency of the current can be reduced, the rotating speed of the motor is reduced, the starting torque of the motor is improved, the low-load starting of the motor is realized, the load rate of the motor is improved, when the rotating speed of the motor reaches the preset rotating speed, the preset rotating speed is the power frequency rotating speed, the change-over switch is switched, the power supply circuit is connected with the motor, the starting time from the static state to the power frequency operation of the motor in the starting process can be regulated by the starting regulation control module, the normal starting of different pumping units can be ensured by regulating the length of the starting time according to different working conditions and motor parameters of the pumping unit, and the electromagnetic limiting device has a limiting effect, and accidents caused by the separation of quick connectors due to misoperation and the like are prevented.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 shows a schematic diagram of a starting circuit of a mobile pumping unit according to an embodiment of the present invention; and
Fig. 2 is a schematic diagram showing a starting circuit structure of a mobile pumping unit according to another embodiment of the present invention;
wherein the above figures include the following reference numerals:
10. A change-over switch; 20. a motor; 30. a power supply circuit; 40. a first line bank; 50. a quick connector; 60. a second line bank; 70. a variable frequency control device; 80. a third line bank; 90. a safety switch; 100. a fourth line bank; 110. a rotation speed sensor; 120. starting an adjusting control module; 130. and an electromagnetic limiting device.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.
In the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present invention.
In order to solve the problems of low motor operation efficiency and high electric energy loss of the pumping unit in the prior art. The invention provides a starting circuit structure, a connecting circuit and a starting method of a movable oil pumping unit. The connecting circuit of the specific movable pumping unit comprises the following starting circuit structure of the pumping unit.
Example 1
As shown in fig. 1, the starting circuit structure of the mobile pumping unit includes a change-over switch 10, a first line bank 40, a quick connector 50, a second line bank 60, a variable frequency control device 70, a starting adjustment control module 120, a third line bank 80, a quick connector 50, a safety switch 90, a fourth line bank 100 and an electromagnetic limiting device 130. The motor 20 of the pumping unit can be conducted with the power circuit 30 through the change-over switch 10. The first line bank 40, the quick connector 50, the second line bank 60, the variable frequency control device 70, the start adjusting control module 120, the third line bank 80, the quick connector 50, the safety switch 90 and the fourth line bank 100 are sequentially connected to form a start loop, and the start loop is parallel connected with the power circuit 30. The change-over switch 10 is selectively connected to the power circuit 30 or the first line bank 40, the start-up adjustment control module 120 is electrically connected to the variable frequency control device 70, the start-up adjustment control module 120 is electrically connected to the change-over switch 10, and the safety switch 90 selectively connects or disconnects the quick connector 50 to or from the fourth line bank 100 to connect or disconnect the start-up loop. The electromagnetic limiting device 130 is disposed at one side or both sides of the quick connector 50, and the electromagnetic limiting device 130 is electrically connected with the start-up adjustment control module 120.
The reason for the greater power of the pumping unit match motor 20 is the non-uniformity of the on-load start and load of the pumping unit. By adopting the starting circuit structure of the pumping unit, when the motor 20 is started, the motor 20 of the pumping unit is connected with the first circuit bank 40 through the change-over switch 10, so that the motor 20 is communicated with the starting circuit, when current passes through the frequency conversion device, the frequency of the current can be reduced, the rotating speed of the motor 20 is reduced, the starting torque of the motor 20 is improved, the low-load starting of the motor 20 is realized, and the load rate of the motor 20 is improved. When the rotation speed of the motor 20 reaches the preset rotation speed, the preset rotation speed is the power frequency rotation speed, and the change-over switch 10 is switched, so that the power circuit 30 is connected with the motor 20. The starting adjustment control module 120 can adjust the starting time from the static state to the power frequency operation of the motor 20 in the starting process, according to different working conditions of the pumping unit and motor parameters, the normal starting of different pumping units can be ensured by adjusting the starting time, the electromagnetic limiting device 130 has a limiting function, the joint is ensured to be connected in place, the contact virtual joint is avoided, the starting operation is not allowed and a warning is sent out if the joint is not in place during the plugging, and the accident caused by the separation of the quick joint 50 due to misoperation and other reasons is prevented.
In this embodiment, the first line bank 40, the quick connector 50, the second line bank 60, the variable frequency control device 70, the start-up adjustment control module 120, the third line bank 80, the quick connector 50, the safety switch 90 and the fourth line bank 100, which are sequentially connected, form a start-up loop, the first line bank 40 is connected to the power circuit 30 through the change-over switch 10, and the fourth line bank 100 is connected to the power circuit 30, so that the start-up loop is incorporated into the power circuit 30.
In this embodiment, during use, the variable frequency control device 70 and the second line bank 60, the start adjustment control module 120, and the third line bank 80 connected thereto are placed on a vehicle, such as a bus, and the change-over switch 10, the quick connector 50, the safety switch 90, and the fourth line bank 100 remain on the power circuit 30 of the pumping unit. Such a frequency conversion control device 70 and a start adjustment control module 120 can be responsible for a plurality of pumping units, and after the start is completed, the frequency conversion control device 70 and the start adjustment control module 120 can be quickly moved to the next pumping unit for use.
In this embodiment, the quick connector 50 can be quickly plugged and unplugged, and meanwhile, can prevent the operator from plugging in the wrong direction, and has directivity. If the operator inserts reversely, the connection cannot be realized, the structure for realizing the function can be a three-hole socket and a plug, the jack can be divided into an up-down direction, and the structure for dividing the up-down direction can also be arranged at the interface of the quick connector 50, such as the structure similar to the interface of a mobile phone charging wire and a USB interface.
In the present embodiment, the electromagnetic limiting means 130 is provided at one side of the quick coupler 50. Of course, the electromagnetic limiting devices 130 may be disposed on both sides of the quick connector 50, so as to achieve better limiting effect and prevent accidents caused by the separation of the quick connector 50 due to misoperation.
In this embodiment, the variable frequency control device 70 may also be a soft start device, and may be selected according to actual use requirements.
The invention is based on the conventional starting of the pumping unit, and the frequency conversion technology is interposed, when the motor 20 reaches the power frequency running rotation speed, the switching from frequency conversion to power frequency is completed in a homeopathy, so that the problem of power frequency starting electric shock is solved, the equipment starting damage and the power grid shock are avoided, the starting process is stable, and the shock is small. Because the frequency conversion control device 70 is not used for a long time each time, the frequency conversion control device 70 can be suitable for severe environments such as high temperature, sand wind and the like, and can prolong the service life of the frequency conversion control device 70 and reduce faults.
As shown in fig. 1, the first line bank 40, the second line bank 60, the third line bank 80, and the power circuit 30 are three-phase circuits. In this embodiment, the motor 20 is a Y-series motor, and the Y-series motor is efficient, energy-saving, low in noise, and high in reliability. The motor 20 is driven by a three-phase ac power supply, and a corresponding starting circuit is also required to use a three-phase circuit. The first line bank 40, the second line bank 60, the third line bank 80, and the power circuit 30 are three-phase circuits.
As shown in fig. 1, the change-over switch 10 has a power frequency position and a variable frequency position, and when the change-over switch 10 is located at the power frequency position, the motor 20 is connected to the power supply circuit 30. When the change-over switch 10 is in the frequency conversion position, the motor 20 is connected with the first line bank 40. In this embodiment, the change-over switch 10 connects the first circuit bank 40 with the power circuit 30, so as to connect the start-up circuit with the power circuit 30, and when the change-over switch 10 is in the frequency conversion position, connects the start-up circuit with the power circuit 30, so as to implement frequency conversion start-up. The change-over switch 10 connects the power supply circuit 30 with the motor, and when the change-over switch 10 is at the power frequency position, the power supply circuit 30 is connected with the motor. The purpose of circuit switching can be achieved by the changeover switch 10.
Example two
The difference between the present embodiment and the first embodiment is that the rotation speed sensor 110 is added on the basis of the original starting circuit.
As shown in fig. 2, the starting circuit structure of the mobile pumping unit further includes a rotation speed sensor 110, where the rotation speed sensor 110 is electrically connected with the motor 20 and is used for reading the rotation speed of the motor 20, the rotation speed sensor 110 is electrically connected with the starting adjustment control module 120, and when the rotation speed of the motor 20 reaches a preset rotation speed, the starting adjustment control module 120 sends a switching instruction to the change-over switch 10, and simultaneously turns off the switch of the frequency conversion control device 70. The change-over switch 10 moves to the frequency conversion position, the first circuit bank 40 is connected with the power circuit 30, the starting circuit is connected with the power circuit 30, and the motor 20 is started. In this embodiment, the transfer switch 10 is provided with electromagnetic relay means for executing instructions to activate the regulation control module 120. The change-over switch 10 is automatically switched from the variable frequency position to the power frequency position by adding the start-up adjustment control module 120. The rotation speed sensor 110 is increased to read the rotation speed of the motor 20, and an operator can judge whether the rotation speed of the motor 20 reaches the power frequency according to the displayed rotation speed on the rotation speed sensor 110, so that visual operation of the operator is facilitated.
As shown in fig. 2, the start regulation control module 120 is electrically connected to the rotation speed sensor 110 and the change-over switch 10 through the quick connector 50. In the actual use process, the start-up adjustment control module 120, the frequency conversion control device 70, the second line bank 60 and the third line bank 80 connected with the start-up adjustment control module are placed on the vehicle, the change-over switch 10, the quick connector 50, the safety switch 90 and the fourth line bank 100 are reserved on the power circuit 30 of the pumping unit, and one frequency conversion control device can be responsible for a plurality of pumping units.
As shown in fig. 1, a method for starting a mobile pumping unit is provided, and the method for starting the mobile pumping unit in the first embodiment includes:
Switching on the change-over switch 10 of the starting circuit structure of the movable pumping unit and the first line bank 40 of the starting circuit structure of the movable pumping unit so as to enable the frequency conversion control device 70 of the starting circuit structure of the movable pumping unit to be put into use;
closing a safety switch 90 of the starting circuit structure of the movable pumping unit to conduct a starting loop of the starting circuit structure of the movable pumping unit;
Closing a switch of the power circuit 30, and starting the motor 20 of the pumping unit; when the rotating speed of the motor of the pumping unit reaches a preset rotating speed, disconnecting the change-over switch 10 from the first line bank 40, and directly conducting the change-over switch 10 and the power circuit 30;
The safety switch 90 is opened.
By adopting the starting method, when the motor 20 is started, the motor 20 of the pumping unit is connected with the first line bank 40 through the change-over switch 10, so that the motor 20 is communicated with a starting circuit, when current passes through the frequency conversion device, the frequency of the current can be reduced, thereby reducing the rotating speed of the motor 20, improving the starting torque of the motor 20, realizing the low-load starting of the motor 20 and improving the load rate of the motor 20.
As shown in fig. 2, for the starting circuit structure of the mobile pumping unit in the second embodiment, a starting method of the mobile pumping unit is provided, which is mainly different from the above starting method in that when the rotation speed of the motor of the pumping unit reaches the set rotation speed, the change-over switch 10 is disconnected from the first line bank 40, and the change-over switch 10 is directly conducted with the power circuit 30, and the method includes the following steps:
The rotation speed sensor 110 of the starting circuit structure of the mobile pumping unit transmits the rotation speed of the motor 20 to the starting regulation control module 120 of the starting circuit structure of the mobile pumping unit;
When the rotation speed of the motor 20 reaches the preset rotation speed, the start-up adjustment control module 120 sends a switching instruction to the change-over switch 10, and the change-over switch 10 is disconnected from the first line bank 40 and directly connected with the power circuit 30, and simultaneously, the switch of the frequency conversion control device 70 is disconnected.
With the above starting method, the starting adjustment control module 120 monitors the rotation speed of the motor 20 read by the rotation speed sensor 110, and when the rotation speed of the motor 20 reaches the preset rotation speed, the starting adjustment control module 120 can send a switching instruction to the change-over switch 10, and the change-over switch 10 is disconnected from the first line bank 40 and directly connected with the power circuit 30, and simultaneously, the switch of the frequency conversion control device 70 is disconnected. The purpose of automatic control is achieved.
It will be apparent that the embodiments described above are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a starting circuit structure of movable pumping unit which characterized in that, the starting circuit structure of movable pumping unit includes:
A change-over switch (10), wherein the motor (20) of the pumping unit can be conducted with the power supply circuit (30) through the change-over switch (10);
The first circuit row group (40), the first end of the quick connector (50), the second circuit row group (60), the variable frequency control device (70), the starting regulation control module (120), the third circuit row group (80), the second end of the quick connector (50), the safety switch (90) and the fourth circuit row group (100) are sequentially connected to form a starting loop, and the starting loop and the power circuit (30) are arranged in parallel;
Wherein the transfer switch (10) is selectively conducted with the power supply circuit (30) or the first line bank (40), the start regulation control module (120) is electrically connected with the variable frequency control device (70), the start regulation control module (120) is electrically connected with the transfer switch (10), and the safety switch (90) selectively conducts or disconnects the quick connector (50) from the fourth line bank (100) so as to conduct or disconnect the start loop;
the electromagnetic limiting device (130) is arranged on one side or two sides of the quick connector (50), and the electromagnetic limiting device (130) is electrically connected with the starting regulation control module (120);
The variable frequency control device (70), the second line bank (60), the starting regulation control module (120) and the third line bank (80) are placed on a vehicle, and the change-over switch (10), the quick connector (50), the safety switch (90) and the fourth line bank (100) are reserved on the power circuit (30);
The starting circuit structure of the movable pumping unit further comprises a rotating speed sensor (110), wherein the rotating speed sensor (110) is electrically connected with the motor (20) and used for reading the rotating speed of the motor (20), the rotating speed sensor (110) is electrically connected with the starting regulation control module (120), and when the rotating speed of the motor (20) reaches the preset rotating speed, the starting regulation control module (120) sends a switching instruction to the change-over switch (10) and simultaneously turns off the switch of the variable frequency control device (70).
2. The starting circuit structure of a mobile pumping unit according to claim 1, wherein the starting regulation control module (120) is electrically connected with the rotation speed sensor (110) and the change-over switch (10) through the quick connector (50).
3. The starting circuit structure of a mobile pumping unit according to claim 1, wherein the first line bank (40), the second line bank (60), the third line bank (80) and the power supply circuit (30) are all three-phase circuits.
4. The starting circuit structure of a mobile pumping unit according to claim 1, wherein the change-over switch (10) has a power frequency position and a frequency conversion position,
When the change-over switch (10) is positioned at the power frequency position, the motor (20) is connected with the power circuit (30);
when the change-over switch (10) is positioned at the frequency conversion position, the motor (20) is communicated with the first line bank (40).
5. A connection circuit of a mobile pumping unit, characterized in that the connection circuit of the mobile pumping unit comprises the starting circuit structure of the mobile pumping unit as defined in any one of claims 1 to 4.
6. A method for starting a mobile pumping unit, characterized in that the method for starting the mobile pumping unit is implemented by adopting the starting circuit structure of the mobile pumping unit as defined in any one of claims 1 to 4, and comprises the following steps:
Switching on a change-over switch (10) of a starting circuit structure of the movable pumping unit and a first line bank (40) of the starting circuit structure of the movable pumping unit so as to enable a variable frequency control device (70) of the starting circuit structure of the movable pumping unit to be put into use;
Closing a safety switch (90) of a starting circuit structure of the movable pumping unit so as to conduct a starting loop of the starting circuit structure of the movable pumping unit;
closing a switch of a power circuit (30) and starting a motor (20) of the pumping unit;
when the rotating speed of the motor of the pumping unit reaches a preset rotating speed, disconnecting the change-over switch (10) from the first line bank (40) and directly conducting the change-over switch (10) and the power circuit (30);
-opening the safety switch (90).
7. The starting method of a mobile pumping unit according to claim 6, characterized in that disconnecting the change-over switch (10) from the first line bank (40) and directly conducting the change-over switch (10) with the power supply circuit (30) when the rotational speed of the motor of the pumping unit reaches a set rotational speed comprises the steps of:
A rotation speed sensor (110) of the starting circuit structure of the movable pumping unit transmits the rotation speed of the motor (20) to a starting regulation control module (120) of the starting circuit structure of the movable pumping unit;
When the rotating speed of the motor (20) reaches a preset rotating speed, the starting regulation control module (120) sends a switching instruction to the change-over switch (10), and the change-over switch (10) is disconnected from the first circuit bank (40) and is directly connected with the power circuit (30), and meanwhile, the switch of the frequency conversion control device (70) is disconnected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010632112.4A CN113890418B (en) | 2020-07-03 | 2020-07-03 | Starting circuit structure, connecting circuit and starting method of movable oil pumping unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010632112.4A CN113890418B (en) | 2020-07-03 | 2020-07-03 | Starting circuit structure, connecting circuit and starting method of movable oil pumping unit |
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| CN113890418A CN113890418A (en) | 2022-01-04 |
| CN113890418B true CN113890418B (en) | 2024-04-30 |
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| JP2001169575A (en) * | 1999-12-02 | 2001-06-22 | Mitsubishi Electric Corp | Self-starting synchronous motor system |
| JP2001169576A (en) * | 1999-12-03 | 2001-06-22 | Mitsubishi Electric Corp | Self-starting synchronous motor system |
| CN106208896A (en) * | 2016-07-20 | 2016-12-07 | 大庆油田有限责任公司 | Driving method under the unconventional working system of oil pumper and system |
| CN106452276A (en) * | 2016-10-18 | 2017-02-22 | 浙江佳乐科仪股份有限公司 | Integrated rare-earth permanent magnet variable-frequency driving energy-saving motor for pumping unit |
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