Direct-current power supply system applied to petroleum kowtow machine

Abstract

The utility model relates to the technical field of petroleum kowtow machine power supply, in particular to a direct current power supply system applied to a petroleum kowtow machine. The system comprises an energy storage device used for providing electric energy for a load motor and storing backflow electric energy of the kowtow machine in the operation process, and the energy storage device is electrically connected with an electric energy circulation device; and the power distribution equipment comprises a direct current power supply device and a power distribution device, the direct current power supply device comprises a power supply module and a loop module, the power supply module is electrically connected with the loop module through a transformer TC, and the power distribution device is electrically connected with the electric energy circulation device. By means of the system, surplus electric energy in the working process of the kowtow machine can be recycled, meanwhile, compared with a traditional multi-step-sequence mode of current conversion, the number of conversion steps and use of equipment can be reduced, and energy loss and the cost in the oil exploitation process are greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply for petroleum kowtow machines, in particular to a direct current power supply system applied to petroleum kowtow machines. Background Art

[0002] The kowtow machine mainly consists of a donkey head, a walking beam, a connecting rod, a crank mechanism, a reduction gear, a power unit, and auxiliary equipment. During operation, the electric motor's power is converted into the up-and-down motion of the donkey head through the gearbox and the crank mechanism. The donkey head then drives the plunger of the downhole oil pump up and down through the polished rod and the sucker rod, thereby continuously pumping crude oil out of the wellbore.

[0003] When the equipment is running, the motor consumes a lot of electricity when the bulky donkey head drives the plunger of the oil pump to move upward. When the pressure of the donkey head moves downward, the motor will also consume some electricity when idling. The traditional power supply method usually uses DC to AC, and then AC to DC to power the motor. This power supply method not only has many conversion processes and increases the use of conversion equipment, but also increases the loss of electricity during the current conversion process, which will lead to a lot of energy waste in the oil field exploitation process and greatly increase the exploitation cost. Utility Model Content

[0004] The utility model provides a DC power supply system for an oil kowtow machine, which is used to solve the problem that the power supply method in the prior art not only has many conversion processes and increases the use of conversion equipment, but also increases the loss of electric energy during the current conversion process, resulting in a large amount of energy waste during oil field exploitation.

[0005] In order to solve the above problems, the utility model provides a DC power supply system for a petroleum kowtow machine, comprising:

[0006] An energy storage device, used to provide electrical energy to the load motor and store the reflux electrical energy of the kowtow machine during operation, the energy storage device being electrically connected to an electrical energy circulation device;

[0007] Power distribution equipment, the power distribution equipment includes a DC power supply device and a power distribution device, the DC power supply device includes a power supply module and a loop module, the power supply module and the loop module are electrically connected through a transformer TC, and the power distribution device is electrically connected to the power circulation device.

[0008] In a preferred embodiment, the power supply module includes a circuit breaker QF1, a first inductor, a frequency converter VFD, a second inductor and a first AC contactor KM, the circuit breaker QF1 is connected to the first inductor, the first inductor is connected to the frequency converter VFD, the frequency converter VFD is connected to the second inductor, KM1 of the first AC contactor KM is connected between the circuit breaker QF1 and the first inductor, KM2 of the first AC contactor KM is connected between the frequency converter VFD and the second inductor, and KM3 of the first AC contactor KM is connected between the circuit breaker QF1 and the second inductor.

[0009] In a preferred embodiment, the loop module includes a circuit breaker QF2, a fuse FU2, an impedance Z1, a current relay KA1, a current relay KA5, a current relay KA6 and a second AC contactor KM, the circuit breaker QF2 is connected to the fuse FU2, the fuse FU2 is connected to the impedance Z1, the circuit breaker QF2 is simultaneously connected in series with the current relay KA1, the current relay KA5 and the current relay KA6, KM1 of the second AC contactor KM is connected to the current relay KA5, KM2 of the second AC contactor KM is connected to the current relay KA6, and KM3 of the second AC contactor KM is connected to the current relay KA1.

[0010] In a preferred embodiment, the electric energy circulation device comprises:

[0011] a charge-discharge circuit, for electrically connecting the power distribution device and the energy storage device, respectively, for converting excess electrical energy and storing it in the energy storage device;

[0012] A power driving module, connected to the charging and discharging circuit, for driving the charging and discharging circuit;

[0013] A control module is connected to the power drive module and is used to output a PWM signal to control the charge and discharge circuit via the power drive module. The control module includes a single-chip microcomputer, a current detection circuit, a voltage detection circuit, and a temperature detection circuit. The single-chip microcomputer is connected to the charge and discharge circuit and is driven by a power supply chip. Analog signals are sampled and input into the single-chip microcomputer, and the core control function of the system is completed through a logic program. The current detection circuit and the voltage detection circuit are respectively connected to the single-chip microcomputer and the charge and discharge circuit, and the temperature detection circuit is connected to the single-chip microcomputer.

[0014] In a preferred embodiment, the charge and discharge circuit includes: a charging circuit, a discharge circuit, a first energy storage capacitor recharging circuit and a second energy storage capacitor charging circuit, wherein the positive electrode of the energy storage capacitor No. 1 is connected through a first diode, and then connected to the positive electrode of the energy storage device through a fifth diode and a first switching tube, and the negative electrode of the energy storage device is connected to the negative output end of the distribution device; the positive electrode of the energy storage device is then connected to a fourth diode, and the positive electrode of the energy storage capacitor No. 2 is also connected to a third diode. These two diodes are connected in parallel to output two paths, one to an energy storage inductor, and the other to the negative output end of the generator through a fourth switching tube; the other end of the energy storage inductor also outputs two paths, one is connected to the positive electrode of the energy storage capacitor No. 1 through a second diode, and the other is connected to the negative output end of the distribution device through a third switching tube; the negative electrode of the energy storage device is connected in parallel with the negative electrode of the energy storage capacitor No. 2, and the positive electrode of the energy storage capacitor No. 1 is connected to the positive electrode of the energy storage capacitor No. 2 through a sixth diode and a second switching tube.

[0015] In a preferred embodiment, the system further includes a new energy power supply device, which is electrically connected to the energy storage device and is used to provide reserve electric energy to the energy storage device.

[0016] In a preferred embodiment, the system further includes an urban energy supply system, which is electrically connected to the power distribution equipment and is used to provide electrical energy to the power distribution equipment.

[0017] In a preferred embodiment, the system further includes a load motor, which is electrically connected to the DC power supply device and is used to drive the movement of the oil kowtow machine.

[0018] The beneficial effects of the present invention are as follows: the present invention proposes a DC power supply system for an oil kowtow machine. The system includes an energy storage device for providing electrical energy to a load motor and storing the return electrical energy of the kowtow machine during operation. The energy storage device is electrically connected to an electrical energy circulation device; a power distribution device, the power distribution device includes a DC power supply device and a power distribution device, the DC power supply device includes a power supply module and a loop module, the power supply module and the loop module are electrically connected via a transformer TC, and the power distribution device is electrically connected to the electrical energy circulation device. Through this system, the excess electrical energy during the operation of the kowtow machine can be recovered. At the same time, compared with the traditional multi-step current conversion method, the number of conversion steps and the amount of equipment used can be reduced, greatly reducing energy loss and costs in the oil extraction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the process framework of the DC power supply system is shown;

[0021] Figure 2 shows a schematic diagram of the circuit structure of the power supply system;

[0022] Figure 3 shows a schematic diagram of a DC power supply;

[0023] Figure 4 shows a schematic diagram of the circuit structure of a DC power supply device;

[0024] Figure 5 Shows a schematic diagram of the control flow of the electric energy circulation device;

[0025] Figure 6 Shows a schematic diagram of the circuit structure of the electric energy circulation device;

[0026] Figure 7 Shown is a schematic diagram of the working structure of the kowtow machine.

[0027] Description of main component symbols:

[0028] 100-Energy storage device; 110-Electric energy circulation device; 200-Power distribution equipment; 210-DC power supply device; 211-Power supply module; 212-Loop module; 220-Power distribution device; 300-New energy power supply equipment; 400-Urban energy power supply system; 500-Load motor. DETAILED DESCRIPTION

[0029] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0032] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0034] See also Figure 1-7The present invention provides a DC power supply system (hereinafter referred to as the system) for a petroleum kowtow machine, the system comprising an energy storage device 100 and a power distribution device 200, wherein the energy storage device 100 is used to provide electrical energy to a load motor 500 and store the return electrical energy of the kowtow machine during operation; the power distribution device 200 comprises a DC power supply device 210 and a power distribution device 220, the DC power supply device 210 comprises a power supply module 211 and a loop module 212, the power supply module 211 and the loop module 212 are electrically connected via a transformer TC, and the power distribution device 220 is electrically connected to the power circulation device 110.

[0035] Specifically, the energy storage device 100 is electrically connected to the electric energy circulation device 110, and the electric energy circulation device 110 includes:

[0036] The charge-discharge circuit is used to electrically connect the power distribution device 220 and the energy storage device 100 respectively, so as to convert excess electric energy and store it in the energy storage device 100; the power drive module is connected to the charge-discharge circuit to drive the charge-discharge circuit; the control module is connected to the power drive module to output a PWM signal to control the charge-discharge circuit via the power drive module. The control module includes a single-chip microcomputer, a current detection circuit, a voltage detection circuit and a temperature detection circuit. The single-chip microcomputer is connected to the charge-discharge circuit and is driven by the power supply chip. The analog signal is sampled and input into the single-chip microcomputer, and the core control function of the system is completed through the logic program; the current detection circuit and the voltage detection circuit are respectively connected to the single-chip microcomputer and the charge-discharge circuit, and the temperature detection circuit is connected to the single-chip microcomputer.

[0037] In the above scheme, the charge and discharge circuit includes: a charging circuit, a discharging circuit, a first energy storage capacitor recharging circuit and a second energy storage capacitor charging circuit, wherein the positive electrode of the energy storage capacitor No. 1 is connected through a first diode, and then connected to the positive electrode of the energy storage device through a fifth diode and a first switching tube, and the negative electrode of the energy storage device is connected to the negative output end of the distribution device; the positive electrode of the energy storage device is further connected to a fourth diode, and the positive electrode of the energy storage capacitor No. 2 is also connected to a third diode. These two diodes are connected in parallel to output two paths, one to an energy storage inductor, and the other to the negative output end of the generator through a fourth switching tube; the other end of the energy storage inductor also outputs two paths, one to the positive electrode of the energy storage capacitor No. 1 through a second diode, and the other to the negative output end of the distribution device through a third switching tube; the negative electrode of the energy storage device is connected in parallel to the negative electrode of the energy storage capacitor No. 2, and the positive electrode of the energy storage capacitor No. 1 is connected to the positive electrode of the energy storage capacitor No. 2 through a sixth diode and a second switching tube.

[0038] Based on the above scheme, the DC power supply device 210 includes a power supply module 211 and a loop module 212, wherein the power supply module 211 includes a circuit breaker QF1, a first reactor, a frequency converter VFD, a second reactor and a first AC contactor KM, the circuit breaker QF1 is connected to the first reactor, the first reactor is connected to the frequency converter VFD, the frequency converter VFD is connected to the second reactor, KM1 of the first AC contactor KM is connected between the circuit breaker QF1 and the first reactor, KM2 of the first AC contactor KM is connected between the frequency converter VFD and the second reactor, and KM3 of the first AC contactor KM is connected between the circuit breaker QF1 and the second reactor.

[0039] Based on the above scheme, the loop module 212 includes a circuit breaker QF2, a fuse FU2, an impedance Z1, a current relay KA1, a current relay KA5, a current relay KA6 and a second AC contactor KM. The circuit breaker QF2 is connected to the fuse FU2, the fuse FU2 is connected to the impedance Z1, the circuit breaker QF2 is simultaneously connected in series with the current relay KA1, the current relay KA5 and the current relay KA6, KM1 of the second AC contactor KM is connected to the current relay KA5, KM2 of the second AC contactor KM is connected to the current relay KA6, and KM3 of the second AC contactor KM is connected to the current relay KA1.

[0040] Please continue reading Figure 1 、 Figure 3 and Figure 7 On the basis of the above solution, the system further includes a new energy power supply device 300, which is electrically connected to the energy storage device 100, and the new energy power supply device 300 is used to provide reserve electric energy to the energy storage device 100.

[0041] On the basis of the above solution, the system further includes an urban energy supply system 400 , which is electrically connected to the power distribution equipment 200 , and is used to provide electrical energy to the power distribution equipment 200 .

[0042] On the basis of the above solution, the system further includes a load motor 500 , which is electrically connected to the DC power supply device 210 , and is used to drive the movement of the oil nodding machine.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0044] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A DC power supply system for a petroleum kowtow machine, characterized in that: include: An energy storage device, used to provide electrical energy to the load motor and store the reflux electrical energy of the kowtow machine during operation, the energy storage device being electrically connected to an electrical energy circulation device; Power distribution equipment, the power distribution equipment includes a DC power supply device and a power distribution device, the DC power supply device includes a power supply module and a loop module, the power supply module and the loop module are electrically connected through a transformer TC, and the power distribution device is electrically connected to the power circulation device.

2. The DC power supply system for a petroleum kowtow machine according to claim 1, characterized in that: The power supply module includes a circuit breaker QF1, a first reactor, a frequency converter VFD, a second reactor and a first AC contactor KM. The circuit breaker QF1 is connected to the first reactor, the first reactor is connected to the frequency converter VFD, the frequency converter VFD is connected to the second reactor, KM1 of the first AC contactor KM is connected between the circuit breaker QF1 and the first reactor, KM2 of the first AC contactor KM is connected between the frequency converter VFD and the second reactor, and KM3 of the first AC contactor KM is connected between the circuit breaker QF1 and the second reactor.

3. The DC power supply system for a petroleum kowtow machine according to claim 1, characterized in that: The loop module includes a circuit breaker QF2, a fuse FU2, an impedance Z1, a current relay KA1, a current relay KA5, a current relay KA6 and a second AC contactor KM. The circuit breaker QF2 is connected to the fuse FU2, the fuse FU2 is connected to the impedance Z1, the circuit breaker QF2 is simultaneously connected in series with the current relay KA1, the current relay KA5 and the current relay KA6, KM1 of the second AC contactor KM is connected to the current relay KA5, KM2 of the second AC contactor KM is connected to the current relay KA6, and KM3 of the second AC contactor KM is connected to the current relay KA1.

4. The DC power supply system for a petroleum kowtow machine according to claim 1, characterized in that: The electric energy circulation device comprises: a charge-discharge circuit, for electrically connecting the power distribution device and the energy storage device, respectively, for converting excess electrical energy and storing it in the energy storage device; A power driving module, connected to the charging and discharging circuit, for driving the charging and discharging circuit; A control module is connected to the power drive module and is used to output a PWM signal to control the charge and discharge circuit via the power drive module. The control module includes a single-chip microcomputer, a current detection circuit, a voltage detection circuit, and a temperature detection circuit. The single-chip microcomputer is connected to the charge and discharge circuit and is driven by a power supply chip. Analog signals are sampled and input into the single-chip microcomputer, and the core control function of the system is completed through a logic program. The current detection circuit and the voltage detection circuit are respectively connected to the single-chip microcomputer and the charge and discharge circuit, and the temperature detection circuit is connected to the single-chip microcomputer.

5. The DC power supply system for a petroleum kowtow machine according to claim 4, characterized in that: The charging and discharging circuit includes: a charging circuit, a discharging circuit, a first energy storage capacitor recharging circuit and a second energy storage capacitor charging circuit, wherein the positive electrode of the energy storage capacitor No. 1 is connected through a first diode, and then connected to the positive electrode of the energy storage device through a fifth diode and a first switching tube, and the negative electrode of the energy storage device is connected to the negative output end of the distribution device; the positive electrode of the energy storage device is then connected to a fourth diode, and the positive electrode of the energy storage capacitor No. 2 is also connected to a third diode. These two diodes are connected in parallel to output two paths, one path is connected to an energy storage inductor, and the other path is connected to the negative output end of the generator through a fourth switching tube; the other end of the energy storage inductor also outputs two paths, one path is connected to the positive electrode of the energy storage capacitor No. 1 through a second diode, and the other path is connected to the negative output end of the distribution device through a third switching tube; the negative electrode of the energy storage device is connected in parallel with the negative electrode of the energy storage capacitor No. 2, and the positive electrode of the energy storage capacitor No. 1 is connected to the positive electrode of the energy storage capacitor No. 2 through a sixth diode and a second switching tube.

6. The DC power supply system for a petroleum kowtow machine according to claim 1, characterized in that: The system further includes a new energy power supply device, which is electrically connected to the energy storage device and is used to provide reserve electric energy to the energy storage device.

7. The DC power supply system for a petroleum kowtow machine according to claim 1, characterized in that: The system further comprises an urban energy supply system, which is electrically connected to the power distribution equipment and is used to provide electrical energy to the power distribution equipment.

8. The DC power supply system for a petroleum kowtow machine according to claim 1, characterized in that: The system further comprises a load motor, which is electrically connected to the DC power supply device and is used to drive the movement of the oil nodding machine.

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