High-low pressure double-loop ground blowout preventer control device

文档序号:582836 发布日期:2021-05-25 浏览:17次 中文

阅读说明:本技术 一种高低压双回路的地面防喷器控制装置 (High-low pressure double-loop ground blowout preventer control device ) 是由 王玮 田彦东 孟凡铁 李青双 于 2021-02-18 设计创作,主要内容包括:本发明公开了一种高低压双回路地面防喷器控制装置,包括:与油箱分别连通的低压油路和高压油路以及各个元件的控制部分;控制部分包括低压泵控制器、高压泵控制器、三位四通转阀、三个三位五通电磁换向阀、空压机和控制柜;低压油路设置有低压蓄能器组、低压总球阀、溢流阀一、单向阀一、低压泵、滤油器一和流量计,高压油路设置有高压蓄能器组、高压总球阀、溢流阀二、单向阀二、高压泵、滤油器二和两个气动高压球阀。本发明提供的高低压双回路的地面防喷器控制装置,使用低压蓄能器和高压蓄能器共同为大直径钻铤剪切防喷器提供工作液压油,在实现剪切功能的同时,可以大大降低制造成本。(The invention discloses a high-low pressure double-loop ground blowout preventer control device, which comprises: a low pressure oil passage and a high pressure oil passage respectively communicated with the oil tank and a control part of each element; the control part comprises a low-pressure pump controller, a high-pressure pump controller, a three-position four-way rotary valve, three-position five-way electromagnetic directional valves, an air compressor and a control cabinet; the low-pressure oil circuit is provided with a low-pressure accumulator group, a low-pressure main ball valve, an overflow valve I, a check valve I, a low-pressure pump, an oil filter I and a flowmeter, and the high-pressure oil circuit is provided with a high-pressure accumulator group, a high-pressure main ball valve, an overflow valve II, a check valve II, a high-pressure pump, an oil filter II and two pneumatic high-pressure ball valves. The high-pressure and low-pressure double-loop ground blowout preventer control device provided by the invention uses the low-pressure energy accumulator and the high-pressure energy accumulator to jointly provide working hydraulic oil for the large-diameter drill collar shearing blowout preventer, and can greatly reduce the manufacturing cost while realizing the shearing function.)

1. A high and low pressure dual circuit surface blowout preventer control apparatus, comprising: a low-pressure oil path and a high-pressure oil path which are respectively communicated with the oil tank (9), and a control part of each element; the control part comprises a low-pressure pump controller (11), a high-pressure pump controller (21), a three-position four-way rotary valve (23), three-position five-way electromagnetic directional valves (27), an air compressor (28) and a control cabinet (29); the low-pressure oil way is provided with a low-pressure energy accumulator set, a low-pressure main ball valve (3), an overflow valve I (4), a check valve I (5), a low-pressure pump (6), an oil filter I (7) and a flowmeter (22), wherein the low-pressure energy accumulator set, the low-pressure main ball valve (3), the overflow valve I (4), the check valve I (5), the low-pressure pump (6) and the oil filter I (7) are sequentially connected with an oil tank (9) through pipelines, the low-pressure pump (6) is used for charging the low-pressure energy accumulator set, and the low-pressure main ball valve (3) is sequentially connected with the flowmeter (22) and an inlet pipeline of a three-position four-; the high-pressure oil way is provided with a high-pressure energy accumulator set, a high-pressure main ball valve (15), a second overflow valve (16), a second check valve (17), a high-pressure pump (18), a second oil filter (19) and two pneumatic high-pressure ball valves, wherein the two pneumatic high-pressure ball valves are a first high-pressure pneumatic ball valve (24) and a second pneumatic high-pressure ball valve (25), the high-pressure energy accumulator set, the high-pressure main ball valve (15), the second overflow valve (16), the second check valve (17), the high-pressure pump (18) and the second oil filter (19) are sequentially connected with an oil tank (9) through pipelines, the high-pressure pump (18) is used for charging the high-pressure energy accumulator set, and the high-pressure main ball valve (15) is sequentially connected with the first pneumatic high-pressure ball valve (24), the second pneumatic high-pressure; the three-position four-way valve (23) and the two pneumatic high-pressure ball valves are respectively connected with one three-position five-way electromagnetic reversing valve (27) through an air pipeline, the three-position five-way electromagnetic reversing valves (27) are respectively connected with the air compressor (28) through the air pipeline, and compressed air controls the reversing of the three-position four-way valve (23) and the opening and closing of the two pneumatic high-pressure ball valves through the three-position five-way electromagnetic reversing valves (27); low pressure pump controller (11), high pressure pump controller (21) and three tribit five-way solenoid directional valve (27) respectively with switch board (29) electric connection, low pressure pump controller (11) are used for controlling the start-stop of low-pressure pump (6), high pressure pump controller (21) are used for controlling the start-stop of high-pressure pump (18).

2. The control device of the high-low pressure double-loop ground blowout preventer according to claim 1, wherein the low pressure accumulator group comprises a plurality of low pressure accumulators (1), and a first low pressure ball valve (2) is arranged at the pipe orifice of each low pressure accumulator (1); the high-pressure accumulator group comprises a plurality of high-pressure accumulators (12), and a first high-pressure ball valve (14) is arranged at a pipe orifice of each high-pressure accumulator (12).

3. High and low pressure dual circuit ground blowout preventer control apparatus according to claim 3, characterized in that the high pressure accumulator (12) is provided with a nitrogen cylinder (13), which nitrogen cylinder (13) is used to increase the effective volume of the high pressure accumulator (12).

4. The control device of the high-low pressure dual-loop ground blowout preventer of claim 1, wherein the first relief valve (4) on the low-pressure oil path is provided in one, and the second relief valve (16) on the high-pressure oil path is provided in two.

5. The high and low pressure dual circuit ground blowout preventer control apparatus according to claim 1, wherein the low pressure pump (6) and the high pressure pump (18) are both triplex plunger pumps.

6. The control device of the high-low pressure double-loop ground blowout preventer according to claim 1, wherein the oil tank (9) is provided with a second low pressure ball valve (10) and a first ball valve (8) at the inlet and outlet of the low pressure loop, and the oil tank (9) is provided with a second high pressure ball valve (20) and a first ball valve (8) at the inlet and outlet of the high pressure loop.

7. The high-low pressure dual circuit ground blowout preventer control apparatus according to claim 1, wherein the low pressure pump controller (11) and the high pressure pump controller (21) are both electronic pressure controllers.

8. The high-low pressure dual circuit surface blowout preventer control apparatus according to claim 1, characterized in that the control cabinet (29) is a PLC control cabinet.

9. The control device of claim 1, further comprising a third high pressure ball valve (26), wherein the third high pressure ball valve (26) is connected in parallel with the first pneumatic high pressure ball valve (24) via a pipeline.

Technical Field

The invention relates to the technical field of oil and gas well control, in particular to a high-pressure and low-pressure double-loop ground blowout preventer control device.

Background

The ground blowout preventer control device is important equipment for controlling a wellhead blowout preventer group, a hydraulic valve and a kill valve, and is an indispensable hydraulic power device in drilling operation.

At present, the highest control pressure of the existing ground blowout preventer control device is 21MPa, which is the pressure required by the existing conventional shear ram blowout preventer to work, but the existing shear ram blowout preventer can only shear a sucker rod, an oil pipe, a drill rod and the like but cannot shear a large-diameter drill collar, such as a 6-1/2 drill collar, the lowest working pressure required by the shear ram blowout preventer is 28MPa, the highest working pressure is 40MPa, and the existing ground blowout preventer control device cannot provide control liquid for controlling the corresponding pressure. The shearing ram blowout preventer needs low-pressure control liquid in a period of time in the early stage of the shearing operation process (before the shearing ram is contacted with a shearing object), and only after the shearing ram is contacted with the shearing object, the high-pressure control liquid is needed to overcome shearing resistance, so that the shearing task is realized. In order to cut off a large-diameter drill collar, a high-pressure and low-pressure double-loop ground blowout preventer control device needs to be designed and developed urgently.

Disclosure of Invention

The invention aims to provide a high-pressure and low-pressure double-loop ground blowout preventer control device, which uses a low-pressure energy accumulator and a high-pressure energy accumulator to jointly provide working hydraulic oil for a large-diameter drill collar shearing blowout preventer, and can greatly reduce the manufacturing cost while realizing the shearing function.

In order to achieve the purpose, the invention provides the following scheme:

a high and low pressure dual circuit surface blowout preventer control apparatus, comprising: a low pressure oil passage and a high pressure oil passage respectively communicated with the oil tank and a control part of each element; the control part comprises a low-pressure pump controller, a high-pressure pump controller, a three-position four-way rotary valve, three-position five-way electromagnetic directional valves, an air compressor and a control cabinet; the low-pressure oil way is provided with a low-pressure energy accumulator group, a low-pressure main ball valve, a first overflow valve, a first check valve, a low-pressure pump, a first oil filter and a flowmeter, the low-pressure energy accumulator group, the low-pressure main ball valve, the first overflow valve, the first check valve, the low-pressure pump and the first oil filter are sequentially connected with an oil tank through pipelines, the low-pressure pump is used for charging the low-pressure energy accumulator group, and the low-pressure main ball valve is sequentially connected with the flowmeter and an inlet pipeline of a three-position; the high-pressure oil way is provided with a high-pressure energy accumulator group, a high-pressure main ball valve, an overflow valve II, a check valve II, a high-pressure pump, an oil filter II and two pneumatic high-pressure ball valves, the two pneumatic high-pressure ball valves are a high-pressure pneumatic ball valve I and a pneumatic high-pressure ball valve II, the high-pressure energy accumulator group, the high-pressure main ball valve, the overflow valve II, the check valve II, the high-pressure pump and the oil filter II are sequentially connected with an oil tank through pipelines, the high-pressure pump is used for pressurizing the high-pressure energy accumulator group, and the high-pressure main ball valve is sequentially connected with a closed pipeline of the pneumatic high-pressure; the three-position four-way valve and the two pneumatic high-pressure ball valves are respectively connected with one three-position five-way electromagnetic reversing valve through an air pipeline, the three-position five-way electromagnetic reversing valves are all connected with the air compressor through the air pipeline, and compressed air controls the reversing of the three-position four-way valve and the opening and closing of the two pneumatic high-pressure ball valves through the three-position five-way electromagnetic reversing valves; the low pressure pump controller, the high pressure pump controller and the three-position five-way electromagnetic directional valves are respectively electrically connected with the control cabinet, the low pressure pump controller is used for controlling starting and stopping of the low pressure pump, and the high pressure pump controller is used for controlling starting and stopping of the high pressure pump.

Optionally, the low-pressure accumulator group comprises a plurality of low-pressure accumulators, and a first low-pressure ball valve is arranged at a pipe orifice of each low-pressure accumulator; the high-pressure accumulator group comprises a plurality of high-pressure accumulators, and a first high-pressure ball valve is arranged at the pipe orifice of each high-pressure accumulator.

Optionally, the high-pressure accumulator is provided with a nitrogen cylinder, and the nitrogen cylinder is used for increasing the effective volume of the high-pressure accumulator.

Optionally, the first overflow valve on the low-pressure oil line is set to be one, and the second overflow valve on the high-pressure oil line is set to be two.

Optionally, the low-pressure pump and the high-pressure pump are both triplex plunger pumps.

Optionally, a second low-pressure ball valve and a first ball valve are arranged at an inlet and an outlet of the oil tank communicated with the low-pressure loop, and a second high-pressure ball valve and a first ball valve are arranged at an inlet and an outlet of the oil tank communicated with the high-pressure loop.

Optionally, the low pressure pump controller and the high pressure pump controller are both electronic pressure controllers.

Optionally, the control cabinet is a PLC control cabinet.

Optionally, the device further comprises a third high-pressure ball valve, and the third high-pressure ball valve is connected with the first pneumatic high-pressure ball valve in parallel through a pipeline. According to the specific embodiment provided by the invention, the invention discloses the following technical effects:

1) the low-pressure energy accumulator and the high-pressure energy accumulator are matched for use, so that the shearing work of the large-diameter drill collar is realized, the available liquid amount of the energy accumulators with fixed quantity can be greatly increased, and the requirement that more energy accumulators are used for meeting the functional liquid amount is avoided.

2) The rated pressure of all connecting pieces of the low-pressure energy accumulator is used conventionally, so the selection range is wider, all connecting pieces of the high-pressure energy accumulator are fewer in number and types, so the selection is more convenient, and the high-pressure energy accumulator is matched with the nitrogen cylinder for use, so the effective volume of the high-pressure energy accumulator is increased.

3) The low-pressure energy accumulator can provide oil for the shearing gate plate in a no-load or light-load stroke, and the high-pressure energy accumulator is used for providing high-pressure hydraulic oil when the shearing gate plate needs high thrust to shear the tubular column, so that peak thrust is provided for the shearing gate plate, the high-pressure oil is used for shearing the initial break, the shearing reliability is ensured, and the total cost of equipment is greatly reduced.

4) The whole set of pipelines does not need to bear the rated pressure of 40MPa, so that the processing difficulty of the pipelines of the whole set of equipment can be reduced, and the manufacturing cost is finally reduced.

5) The PLC is adopted to control the switching of high pressure and low pressure under the set liquid amount more accurately, and meanwhile, the occurrence of misoperation is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of a control device of a high-pressure and low-pressure dual-loop ground blowout preventer according to an embodiment of the invention;

description of reference numerals: 1. a low pressure accumulator; 2. a first low-pressure ball valve; 3. a low pressure main ball valve; 4. a first overflow valve; 5. a one-way valve I; 6. a low pressure pump; 7. a first oil filter; 8. a first ball valve; 9. an oil tank; 10. a low-pressure ball valve III; 11. a low pressure pump controller; 12. a high pressure accumulator; 13. a nitrogen gas cylinder; 14. a first high-pressure ball valve; 15. a high pressure main ball valve; 16. an overflow valve II; 17. a second one-way valve; 18. a high pressure pump; 19. a second oil filter; 20. a second high-pressure ball valve; 21. a high pressure pump controller; 22. a flow meter; 23. a three-position four-way rotary valve; 24. a first pneumatic high-pressure ball valve; 25. a pneumatic high-pressure ball valve II; 26. a high-pressure ball valve III; 27. a three-position five-way electromagnetic directional valve; 28. an air compressor; 29. a control cabinet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide a high-pressure and low-pressure double-loop ground blowout preventer control device, which uses a low-pressure energy accumulator and a high-pressure energy accumulator to jointly provide working hydraulic oil for a large-diameter drill collar shearing blowout preventer, and can greatly reduce the manufacturing cost while realizing the shearing function.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

As shown in fig. 1, a high-low pressure dual-circuit surface blowout preventer control apparatus according to an embodiment of the present invention includes: a low-pressure oil passage and a high-pressure oil passage which are respectively communicated with the oil tank 9, and a control part of each element; the control part comprises a low-pressure pump controller 11, a high-pressure pump controller 21, a three-position four-way rotary valve 23, three-position five-way electromagnetic directional valves 27, an air compressor 28 and a control cabinet 29; a double-acting cylinder and a position sensor are arranged at the position of a three-position four-way valve 23, the position sensor is electrically connected with a control cabinet and is used for detecting the opening/closing position of the three-position four-way valve 23, a low-pressure oil circuit is provided with a low-pressure energy accumulator group, a low-pressure main ball valve 3, a first overflow valve 4, a one-way valve 5, a low-pressure pump 6, a first oil filter 7 and a flowmeter 22, the low-pressure energy accumulator group, the low-pressure main ball valve 3, the first overflow valve 4, the one-way valve 5, the low-pressure pump 6 and the first oil filter 7 are sequentially connected with an oil tank 9 through pipelines, the pressure of the low-pressure pump 6 is 25 MPa; the high-pressure oil way is provided with a high-pressure energy accumulator group, a high-pressure main ball valve 15, a second overflow valve 16, a second check valve 17, a high-pressure pump 18, a second oil filter 19 and two pneumatic high-pressure ball valves, wherein the two pneumatic high-pressure ball valves are a first high-pressure pneumatic ball valve 24 and a second pneumatic high-pressure ball valve 25, the high-pressure energy accumulator group, the high-pressure main ball valve 15, the second overflow valve 16, the second check valve 17, the high-pressure pump 18 and the second oil filter 19 are sequentially connected with the oil tank 9 through pipelines, the pressure of the high-pressure pump 18 is 60MPa, the high-pressure pump 18 is used for pressurizing the high-pressure energy accumulator group, and the high-pressure main ball valve 15 is sequentially connected; the three-position four-way valve 23 and the two pneumatic high-pressure ball valves are respectively connected with a three-position five-way electromagnetic reversing valve 27 through air pipelines, the three-position five-way electromagnetic reversing valves 27 are respectively connected with an air compressor 28 through air pipelines, and compressed air controls the reversing of the three-position four-way valve 23 and the opening and closing of the two pneumatic high-pressure ball valves through the three-position five-way electromagnetic reversing valve 27; the low-pressure pump controller 11, the high-pressure pump controller 21 and the three-position five-way electromagnetic directional valves 27 are respectively electrically connected with the control cabinet 29, a motor of the low-pressure pump 6 is electrically connected with a relay, the relay is electrically connected with the low-pressure pump controller 11, the low-pressure pump controller 11 is used for controlling the start and stop of the low-pressure pump 6 to ensure that the storage pressure of the low-pressure accumulator is between 18.9 and 21MP, the motor of the high-pressure pump 18 is electrically connected with the relay, the relay is electrically connected with the high-pressure pump controller 21, and the high-pressure controller 21 is used for controlling the start and stop of the high-pressure pump 18 to ensure that the storage pressure; the device also comprises a fourth high-pressure ball valve 26, and the fourth high-pressure ball valve 26 is connected with the first pneumatic high-pressure ball valve 24 in parallel through a pipeline.

The low-pressure energy accumulator group comprises five low-pressure energy accumulators 1, the number of the low-pressure energy accumulators can be increased or decreased according to actual requirements, and a first low-pressure ball valve 2 is arranged at a pipe orifice of each low-pressure energy accumulator 1; the high-pressure energy accumulator group comprises two high-pressure energy accumulators 12, the number of the high-pressure energy accumulators can be increased or decreased according to actual requirements, and a high-pressure ball valve 14 is arranged at a pipe orifice of each high-pressure energy accumulator 12; the high-pressure accumulator 12 is provided with a nitrogen gas cylinder 13, and the nitrogen gas cylinder 13 is used for increasing the available volume of the high-pressure accumulator 12; one overflow valve 4 on the low-pressure oil way is set to have the pressure of 23MPa, and two overflow valves 16 on the high-pressure oil way are set to have the pressure of 42 MPa; the low-pressure pump 6 and the high-pressure pump 18 are both three-cylinder plunger pumps; a third low-pressure ball valve 10 and a first ball valve 8 are arranged at the inlet and the outlet of the oil tank 9 communicated with the low-pressure loop, and a second high-pressure ball valve 20 and the first ball valve 8 are arranged at the inlet and the outlet of the oil tank 9 communicated with the high-pressure loop; both the low pressure pump controller 11 and the high pressure pump controller 21 are electronic pressure controllers; the control cabinet 29 is a PLC control cabinet and can also be an industrial personal computer control cabinet.

The working principle of the device is as follows: 1) the whole set of device drives the pump through the motor and flows hydraulic oil into the energy accumulator through the check valve, provides pressure oil storage for the control object. 2) Low-pressure oil circuit: when the pneumatic high-pressure ball valve is closed, hydraulic oil flows into the low-pressure accumulator through the check valve by the 25MPa low-pressure pump to store pressure, and the low-pressure pump automatically stops supplying pressure when the pressure reaches 21 MPa; when the control object is closed, hydraulic oil enters the controlled object closing control cavity through the low-pressure energy accumulator, the low-pressure main ball valve, the flowmeter, the three-position four-way rotary valve closing position and the pneumatic high-pressure ball valve II. 3) High-pressure oil circuit: hydraulic oil flows into the high-pressure energy accumulator through the check valve to store pressure through the 60MPa high-pressure pump, the high-pressure pump automatically stops supplying pressure when the pressure reaches 40MPa, an electric signal is generated when the feedback flow of the flow meter reaches the preset flow, the pneumatic high-pressure ball valve II is closed through the output signal of the PLC control cabinet, then the pressure oil enters the controlled object closing control cavity through the high-pressure energy accumulator, the high-pressure main ball valve and the pneumatic high-pressure ball valve I, and high-pressure closing control is achieved. 4) The controlled object opens the oil path flow direction: and when the opening button is touched, the first pneumatic high-pressure ball valve is closed, the second pneumatic high-pressure ball valve is opened after the first pneumatic high-pressure ball valve is closed, the three-position four-way rotary valve is reversed, pressure oil flows into the controlled object opening control cavity from the low-pressure energy accumulator through the low-pressure main ball valve, the flow sensor and the three-position four-way rotary valve opening position, and the controlled object is opened. 5) In the closing process, the hydraulic oil with the controlled opening returns to the oil tank through the three-position four-way rotary valve. 6) In the opening process, the hydraulic oil controlled to be closed returns to the oil tank through the pneumatic high-pressure ball valve two-position and three-position four-way rotary valves. 7) The control system PLC controls: the energy accumulator is powered on under a non-pressure storage state, whether a first pneumatic high-pressure ball valve is in an off position is detected, if the first pneumatic high-pressure ball valve is in the on position, the action of closing the first pneumatic high-pressure ball valve is executed, whether a second pneumatic high-pressure ball valve is in the on position is detected, if the second pneumatic high-pressure ball valve is in the off position, the action of opening the second pneumatic high-pressure ball valve is executed, the three-position four-way rotary valve needs to be manually operated to a middle position when the opening and closing action is not executed, then a motor pump set can be started to charge the energy accumulator, the charging is automatically stopped until a set pressure is reached, and the charging of the electric. When the closing function is started, the PLC controls the three-position four-way rotary valve to be reversed to a closing position, the flow sensor feeds back a flow signal to the PLC, when the flow reaches a set value, the PLC controls the pneumatic high-pressure ball valve II to be closed, the pneumatic high-pressure ball valve I is opened after the pneumatic high-pressure ball valve II is closed until a controlled object is closed in place, and meanwhile, the counting of the flow meter is cleared. When the starting function is started, the PLC controls the first pneumatic high-pressure ball valve to be closed, the second pneumatic high-pressure ball valve is opened after the first pneumatic high-pressure ball valve is closed, the three-position four-way rotary valve is controlled to be reversed to the open position, and at the moment, flow signals fed back by the flow sensor are not collected until the controlled object is started in place.

The control device of the ground blowout preventer with the high-pressure and low-pressure double loops, provided by the embodiment of the invention, has the following technical effects:

1) the low-pressure energy accumulator and the high-pressure energy accumulator are matched for use, so that the shearing work of the large-diameter drill collar is realized, the available liquid amount of the energy accumulators with fixed quantity can be greatly increased, and the requirement that more energy accumulators are used for meeting the functional liquid amount is avoided.

2) The rated pressure of all connecting pieces of the low-pressure energy accumulator is used conventionally, so the selection range is wider, all connecting pieces of the high-pressure energy accumulator are fewer in number and types, so the selection is more convenient, and the high-pressure energy accumulator is matched with the nitrogen cylinder for use, so the effective volume of the high-pressure energy accumulator is increased.

3) The low-pressure energy accumulator can provide oil for the shearing gate plate in a no-load or light-load stroke, and the high-pressure energy accumulator is used for providing high-pressure hydraulic oil when the shearing gate plate needs high thrust to shear the tubular column, so that peak thrust is provided for the shearing gate plate, the high-pressure oil is used for shearing the initial break, the shearing reliability is ensured, and the total cost of equipment is greatly reduced.

4) The whole set of pipelines does not need to bear the rated pressure of 40MPa, so that the processing difficulty of the pipelines of the whole set of equipment can be reduced, and the manufacturing cost is finally reduced.

5) The PLC is adopted to control the switching of high pressure and low pressure under the set liquid amount more accurately, and meanwhile, the occurrence of misoperation is avoided.

The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

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