Impressed current cathodic protection device for corrosion prevention of oil and gas pipeline

Abstract

The impressed current cathodic protection device comprises a driving assembly, a power source, a rotating power generation assembly and a cathodic protection mechanism, and the driving assembly comprises a first shunt branch pipe, a second shunt branch pipe, a rotating sleeve and fan blades; the rotating power generation assembly is used for converting rotation of the rotating sleeve into electric energy and storing the electric energy to the power supply; the cathode protection mechanism comprises a discharge controller, a positive wire and a negative wire. The power generation device has the beneficial effects that oil gas in the oil gas pipeline enters the rotating sleeve through the first flow dividing branch pipe, the fan blades can drive the rotating sleeve to rotate, the rotating power generation assembly starts to work, mechanical energy generated by rotation of the rotating sleeve is converted into electric energy, and the generated electric energy is stored in the power source; the external current can form a protective electric field on the surface of the oil and gas pipeline, the electric field can inhibit or slow down the corrosion process, the corrosion resistance of the oil and gas pipeline can be effectively improved, and long-term stable operation of the oil and gas pipeline is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas pipeline anti-corrosion, and in particular to an impressed current cathodic protection device for oil and gas pipeline anti-corrosion. Background Art

[0002] As an important facility for energy transmission, the safety and stability of oil and gas pipelines are crucial to national energy security, economic development and people's daily life. Among the many maintenance tasks of oil and gas pipelines, anti-corrosion treatment is extremely important.

[0003] Impressed current cathodic protection is a commonly used method for corrosion protection of oil and gas pipelines. The impressed current method uses a DC power supply, with the negative pole connected to the protected pipeline and the positive pole connected to the anode ground bed. After the circuit is connected, the pipeline is cathodically polarized. When the pipeline-to-ground potential reaches the minimum protection potential, complete cathodic protection is obtained. This method requires a stable power supply. However, in remote areas with power shortages, stable power supply has become a technical problem. Although solar power generation is a viable alternative, it is greatly affected by weather and day and night changes, and it is difficult to meet the demand for continuous and stable power supply. Summary of the invention

[0004] The purpose of the present invention is to overcome the above technical deficiencies and propose an impressed current cathodic protection device for oil and gas pipeline corrosion protection, so as to solve the technical problem in the prior art that it is difficult to provide a stable and reliable power supply for the impressed current cathodic protection system in remote power-deficient areas.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0006] The present invention provides an impressed current cathodic protection device for oil and gas pipeline corrosion protection, comprising:

[0007] A driving assembly, the driving assembly comprising a first branch pipe, a second branch pipe, a rotating sleeve and a fan blade, one end of the first branch pipe and the second branch pipe are respectively connected to the oil and gas pipeline, two ends of the rotating sleeve are respectively rotatably connected to the other end of the first branch pipe and the second branch pipe, and the fan blade is coaxially fixed in the rotating sleeve;

[0008] power supply;

[0009] a rotating power generation assembly, the rotating power generation assembly being used to convert the rotation of the rotating sleeve into electrical energy and store it in the power source; and,

[0010] A cathodic protection mechanism, the cathodic protection mechanism comprising a discharge controller, a positive wire and a negative wire, the input end of the discharge controller is electrically connected to the power supply, one end of the positive wire is electrically connected to the positive output end of the discharge controller, the other end of the positive wire is grounded, one end of the negative wire is electrically connected to the negative output end of the discharge controller, and the other end of the negative wire is electrically connected to the oil and gas pipeline.

[0011] In some embodiments, the oil and gas pipeline includes a first pipe section, an intermediate pipe section and a second pipe section, and the drive assembly also includes a first tee and a second tee, the first interface of the first tee is connected to the first pipe section, the second interface of the first tee is connected to one end of the intermediate pipe section, the third interface of the first tee is connected to one end of the first branch pipe, the first interface of the second tee is connected to the second pipe section, the second interface of the second tee is connected to the other end of the intermediate pipe section, and the third interface of the second tee is connected to one end of the second branch pipe.

[0012] In some embodiments, a first control valve and a second control valve are respectively disposed on the first branch pipe and the second branch pipe.

[0013] In some embodiments, the rotating power generation component includes an outer sleeve, a power generation winding, two permanent magnets, two slip rings, two brushes and a charging controller, the two ends of the outer sleeve are respectively fixedly connected to the first shunt branch and the second shunt branch, the outer sleeve is located outside the rotating sleeve and is coaxially arranged with the rotating sleeve, the power generation winding is wound on the rotating sleeve, the two permanent magnets are respectively fixed on the inner wall of the outer sleeve and are respectively located on both sides of the rotating sleeve, and the two opposite sides of the two permanent magnets have opposite magnetic properties, the two slip rings are both fixed on the rotating sleeve and are respectively electrically connected to the two ends of the power generation winding, the two brushes are both fixed in the outer sleeve and are respectively abutted against the two slip rings, the two brushes are respectively electrically connected to the positive and negative poles of the input end of the charging controller, and the output end of the charging controller is electrically connected to the input end of the power supply.

[0014] In some embodiments, the impressed current cathodic protection device for oil and gas pipeline corrosion protection also includes a solar charging component, which includes a plurality of columns, a ceiling and a photovoltaic panel. The columns are fixed to the ground, the ceiling is fixed to the upper ends of each of the columns and covers the outer sleeve, the photovoltaic panel is fixed to the top surface of the ceiling, and the photovoltaic panel is electrically connected to the input end of the charging controller.

[0015] In some embodiments, the charging controller may obtain the output power of the photovoltaic panel, and the discharging controller may obtain the discharging power;

[0016] The charging controller is electrically connected to the discharge controller, the first control valve and the second control valve, and when the power of the power source is lower than a first preset power, the charging controller stores the electric energy output by the photovoltaic panel into the power source;

[0017] When the power level of the power supply is lower than a second preset power level and the output power of the photovoltaic panel is less than the discharge power of the discharge controller, the first control valve and the second control valve are opened, and the charging controller stores the electric energy generated by the rotating power generation component and the electric energy output by the photovoltaic panel into the power supply.

[0018] In some embodiments, a first limiting groove is formed at the other end of the first branch pipe, and a second limiting groove is formed at the other end of the second branch pipe. A first convex ring and a second convex ring are formed at both ends of the rotating sleeve, respectively, and the first convex ring and the second convex ring are respectively embedded in the first limiting groove and the second limiting groove.

[0019] In some embodiments, the other end of the first branch pipe is sleeved with a first sealing ring, and the first sealing ring is embedded between the outer wall of the first branch pipe and the inner wall of the rotating sleeve; the other end of the second branch pipe is sleeved with a second sealing ring, and the second sealing ring is embedded between the outer wall of the second branch pipe and the inner wall of the rotating sleeve.

[0020] In some embodiments, the cathodic protection mechanism further includes an anode ground bed, which is buried under the ground, and the other end of the positive electrode wire is electrically connected to the anode ground bed.

[0021] In some embodiments, the impressed current cathodic protection device for oil and gas pipeline corrosion protection further includes a plurality of monitors, and the monitors are arranged around the ceiling.

[0022] Compared with the prior art, the beneficial effect of the impressed current cathodic protection device for oil and gas pipeline corrosion protection provided by the present invention is that when in use, the oil and gas in the oil and gas pipeline enter the rotating sleeve through the first branch branch pipe. When the oil and gas impact the fan blades, the fan blades will drive the rotating sleeve to rotate. As the rotating sleeve rotates, the rotating power generation component starts to work. This component converts the mechanical energy of the rotating sleeve into electrical energy and stores the generated electrical energy in the power supply. When the electrical energy in the power supply is sufficient, the discharge controller will start working according to the preset parameters and apply the electrical energy to the oil and gas pipeline through the positive and negative conductors. In this process, the oil and gas pipeline is protected as a cathode, and the positive conductor connected to it is used as an anode. The impressed current will form a protective electric field on the surface of the oil and gas pipeline, which can inhibit or slow down the occurrence of the corrosion process, thereby extending the service life of the oil and gas pipeline. The whole process is a closed-loop system, starting from the oil and gas flow driving the rotating sleeve to rotate, to the generation and storage of electrical energy, and finally to the application to the oil and gas pipeline for cathodic protection. This impressed current cathodic protection device can effectively improve the corrosion resistance of oil and gas pipelines and ensure their long-term stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an impressed current cathodic protection device for oil and gas pipeline corrosion protection provided by one embodiment of the present invention;

[0024] Figure 2 yes Figure 1 A schematic diagram of the structure of the driving assembly and the rotating power generation assembly;

[0025] Figure 3 yes Figure 2 A partial enlarged view of the middle area A;

[0026] Figure 4 yes Figure 2 A partial enlarged view of the middle area B;

[0027] Figure 5 yes Figure 1 Schematic diagram of the structure of the cathodic protection mechanism;

[0028] Description of the accompanying drawings: 1-driving assembly, 11-first branch pipe, 111-first sealing ring, 12-second branch pipe, 121-second sealing ring, 13-rotating sleeve, 131-first convex ring, 132-second convex ring, 14-fan blade, 15-first three-way, 16-second three-way, 17-first control valve, 18-second control valve, 2-power supply, 3-rotating power generation assembly, 31-outer sleeve, 32-power generation winding , 33-permanent magnet, 34-slip ring, 35-brush, 36-charging controller, 4-cathode protection mechanism, 41-discharge controller, 42-positive wire, 43-negative wire, 44-anode bed, 5-oil and gas pipeline, 51-first pipe section, 52-middle pipe section, 53-second pipe section, 6-solar charging component, 61-column, 62-ceiling, 63-photovoltaic panel, 7-monitor, 8-fixed column, 81-hoop. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] In order to solve the technical problem in the prior art that it is difficult to provide a stable and reliable power supply for an impressed current cathodic protection system in remote power-deficient areas, the present invention provides an impressed current cathodic protection device for corrosion protection of oil and gas pipelines.

[0031] See also Figure 1-Figure 5 , Figure 1 This is a schematic structural diagram of an impressed current cathodic protection device for oil and gas pipeline corrosion protection in one embodiment of the present invention. The impressed current cathodic protection device for oil and gas pipeline corrosion protection includes a drive component 1, a power supply 2, a rotating power generation component 3 and a cathodic protection mechanism 4.

[0032] The driving assembly 1 includes a first branch pipe 11, a second branch pipe 12, a rotating sleeve 13 and a fan blade 14. One end of the first branch pipe 11 and the second branch pipe 12 are respectively connected to the oil and gas pipeline 5. The two branch pipes guide the flow of oil and gas and provide a power source for the driving assembly. The two ends of the rotating sleeve 13 are respectively rotatably connected to the other ends of the first branch pipe 11 and the second branch pipe 12. This connection method allows the rotating sleeve 13 to rotate freely under the action of the flow of oil and gas. The fan blade 14 is coaxially fixed in the rotating sleeve 13. The fan blade 14 is coaxially fixed in the rotating sleeve 13. When the oil and gas pass through the branch pipe and impact the fan blade, the fan blade will drive the rotating sleeve to rotate.

[0033] The rotating power generation component 3 is used to convert the rotation of the rotating sleeve 13 into electrical energy and store it in the power source 2.

[0034] The cathodic protection mechanism 4 includes a discharge controller 41, a positive wire 42 and a negative wire 43, the input end of the discharge controller 41 is electrically connected to the power supply 2, one end of the positive wire 42 is electrically connected to the positive output end of the discharge controller 41, the other end of the positive wire 42 is grounded, one end of the negative wire 43 is electrically connected to the negative output end of the discharge controller 41, and the other end of the negative wire 43 is electrically connected to the oil and gas pipeline 5.

[0035] When in use, the oil and gas in the oil and gas pipeline 5 enter the rotating sleeve 13 through the first branch pipe 11. When the oil and gas impact the fan blade 14, the fan blade 14 will drive the rotating sleeve 13 to rotate. As the rotating sleeve 13 rotates, the rotating power generation component 3 starts to work. This component converts the mechanical energy of the rotating sleeve 13 into electrical energy and stores the generated electrical energy in the power supply 2. When the electrical energy in the power supply 2 is sufficient, the discharge controller 41 will start working according to the preset parameters and apply the electrical energy to the oil and gas pipeline 5 through the positive wire 42 and the negative wire 43. In this process, the oil and gas pipeline 5 is protected as a cathode, and the positive wire 42 connected to it is used as an anode. The external current will form a protective electric field on the surface of the oil and gas pipeline 5, which can inhibit or slow down the occurrence of the corrosion process, thereby extending the service life of the oil and gas pipeline. The whole process is a closed-loop system, starting from the oil and gas flow driving the rotating sleeve to rotate, to the generation and storage of electrical energy, and finally to the application to the oil and gas pipeline for cathodic protection. This impressed current cathodic protection device can effectively improve the corrosion resistance of oil and gas pipelines and ensure their long-term stable operation.

[0036] In one embodiment, see Figure 1 and Figure 2 The oil and gas pipeline 5 includes a first pipe section 51, an intermediate pipe section 52 and a second pipe section 53, and the drive assembly 1 also includes a first tee 15 and a second tee 16. The first interface of the first tee 15 is in communication with the first pipe section 51, the second interface of the first tee 15 is in communication with one end of the intermediate pipe section 52, and the third interface of the first tee 15 is in communication with one end of the first branch pipe 11. The first interface of the second tee 16 is in communication with the second pipe section 53, the second interface of the second tee 16 is in communication with the other end of the intermediate pipe section 52, and the third interface of the second tee 16 is in communication with one end of the second branch pipe 12. In this embodiment, the oil and gas pipeline is divided into multiple sections by the first tee and the second tee, and the branch pipes are connected respectively, so that the drive assembly can be more flexibly connected to the oil and gas pipeline, thereby improving the adaptability and installation convenience of the device.

[0037] In one embodiment, see Figure 1 and Figure 2 The first branch pipe 11 and the second branch pipe 12 are respectively provided with a first control valve 17 and a second control valve 18. The control valves are provided on the branch pipes to conveniently control the flow of oil and gas, thereby adjusting the rotation speed and power generation efficiency of the rotating sleeve, providing a more stable current output for the cathodic protection mechanism, and also closing the first control valve 17 and the second control valve 18 when the power supply does not need to be charged, thereby reducing the oil and gas pipeline transportation resistance and preventing the power supply from being overcharged.

[0038] In one embodiment, see Figure 2-Figure 4 The rotating power generation component 3 includes an outer sleeve 31, a power generation winding 32, two permanent magnets 33, two slip rings 34, two brushes 35 and a charging controller 36. The two ends of the outer sleeve 31 are fixedly connected to the first shunt branch 11 and the second shunt branch 12 respectively. The outer sleeve 31 is located outside the rotating sleeve 13 and is coaxially arranged with the rotating sleeve 13. The power generation winding 32 is wound on the rotating sleeve 13. The two permanent magnets 33 are respectively fixed on the inner wall of the outer sleeve 31 and are respectively located on both sides of the rotating sleeve 13, and the two opposite surfaces of the two permanent magnets 33 have opposite magnetic properties. The two slip rings 34 are both fixed on the rotating sleeve 13 and are electrically connected to the two ends of the power generation winding 32 respectively. The two brushes 35 are both fixed in the outer sleeve 31 and are respectively in contact with the two slip rings 34. The two brushes 35 are electrically connected to the positive and negative poles of the input end of the charging controller 36, respectively, and the output end of the charging controller 36 is electrically connected to the input end of the power supply 2. When in use, when the oil and gas in the oil and gas pipeline flows, it enters the interior of the rotating sleeve 13 through the first branch pipe 11, and impacts the blades 14 on the rotating sleeve 13. The rotation of the blades 14 drives the rotating sleeve 13 to rotate inside the outer sleeve 31. When the rotating sleeve 13 rotates, the power generation winding 32 wound on the rotating sleeve 13 cuts the magnetic field generated by the permanent magnet 33, and according to Faraday's law of electromagnetic induction, an induced electromotive force is generated in the power generation winding 32. The induced electromotive force is transmitted through the slip ring 34 and the brush 35, and the electric energy is transferred to the input end of the charging controller 36. The charging controller 36 receives the electric energy from the power generation winding 32, and performs necessary voltage and current adjustments to ensure that the power supply 2 can safely and effectively receive and store electric energy. The regulated electric energy is transferred to the input end of the power source 2 through the output end of the charging controller 36 for storage.

[0039] In one embodiment, see Figure 1 and Figure 5The impressed current cathodic protection device for oil and gas pipeline corrosion protection also includes a solar charging component 6, which includes a plurality of columns 61, a ceiling 62 and a photovoltaic panel 63. The columns 61 are fixed to the ground, the ceiling 62 is fixed to the upper ends of each of the columns 61 and covers the outer sleeve 31, and the photovoltaic panel 63 is fixed to the top surface of the ceiling 62. The photovoltaic panel 63 is electrically connected to the input end of the charging controller 36. Through the solar charging component, the power supply can be charged when there is sufficient light, which further improves the energy utilization efficiency and self-sufficiency of the device. The charging controller can intelligently select the charging source to ensure that the power of the power supply is always maintained at a high level.

[0040] In one embodiment, see Figure 1-Figure 5 , the charging controller 36 can obtain the output power of the photovoltaic panel 63, and the discharge controller 41 can obtain the discharge power. The charging controller 36 is electrically connected to the discharge controller 41, the first control valve 17 and the second control valve 18. When the power of the power source 2 is lower than the first preset power, the charging controller 36 stores the electric energy output by the photovoltaic panel 63 in the power source 2. When the power of the power source 2 is lower than the second preset power, and the output power of the photovoltaic panel 63 is less than the discharge power of the discharge controller 41, the first control valve 17 and the second control valve 18 are opened, and the charging controller 36 stores the electric energy generated by the rotating power generation component 3 and the electric energy output by the photovoltaic panel 63 in the power source 2. Through the above settings, the charging controller and the discharge controller can intelligently control the charging and discharging process according to parameters such as the power of the power source, the output power and the discharge power of the photovoltaic panel to ensure the stable operation and efficient use of the device. By controlling the opening and closing of the first control valve and the second control valve, the power generation efficiency of the power generation component can be flexibly adjusted to adapt to different working environments and needs.

[0041] In one embodiment, see Figure 2-Figure 4 , a first limiting groove is provided at the other end of the first branch pipe 11, and a second limiting groove is provided at the other end of the second branch pipe 12. A first convex ring 131 and a second convex ring 132 are formed at both ends of the rotating sleeve 13, respectively, and the first convex ring 131 and the second convex ring 132 are respectively embedded in the first limiting groove and the second limiting groove. By providing a limiting groove on the branch pipe and forming a convex ring on the rotating sleeve, a stable connection and limiting between the rotating sleeve and the branch pipe are achieved, thereby improving the structural strength and safety of the device.

[0042] In one embodiment, see Figure 2-Figure 4The other end of the first branch pipe 11 is sleeved with a first sealing ring 111, and the first sealing ring 111 is embedded between the outer wall of the first branch pipe 11 and the inner wall of the rotating sleeve 13. The other end of the second branch pipe 12 is sleeved with a second sealing ring 121, and the second sealing ring 121 is embedded between the outer wall of the second branch pipe 12 and the inner wall of the rotating sleeve 13. Adding a sealing ring between the branch pipe and the rotating sleeve can effectively prevent oil and gas leakage and water intrusion, and improve the sealing performance and durability of the device.

[0043] In one embodiment, see Figure 1 and Figure 5 The cathodic protection mechanism further includes an anode bed 44, which is buried under the ground, and the other end of the positive electrode wire is electrically connected to the anode bed. By burying the anode bed and connecting it to the positive electrode wire, a more stable anode potential can be provided for the cathodic protection mechanism, further improving the effect and reliability of cathodic protection.

[0044] In one embodiment, see Figure 1 The impressed current cathodic protection device for oil and gas pipeline corrosion protection also includes a plurality of monitors 7, which are arranged around the ceiling 62. By arranging the monitors around the ceiling, the working state of the device and the changes in the surrounding environment can be monitored in real time, which facilitates the maintenance and management of the device and reduces the possibility of the device being damaged by human beings.

[0045] In one embodiment, see Figure 1 The oil and gas pipeline 5 is fixed to the ground via a plurality of fixing columns 8 and clamps 81, and the fixing columns 8 are made of insulating materials (such as cement piers). Fixing the oil and gas pipeline to the ground using fixing columns and clamps made of insulating materials can improve the effect of impressed current cathodic protection.

[0046] In order to better understand the present invention, the following Figures 1 to 5The technical solution of the present invention is described in detail: when in use, the oil and gas in the oil and gas pipeline 5 enter the rotating sleeve 13 through the first branch pipe 11. When the oil and gas impact the fan blade 14, the fan blade 14 will drive the rotating sleeve 13 to rotate. As the rotating sleeve 13 rotates, the rotating power generation component 3 starts to work. This component converts the mechanical energy of the rotating sleeve 13 into electrical energy and stores the generated electrical energy in the power supply 2. When the electrical energy in the power supply 2 is sufficient, the discharge controller 41 will start working according to the preset parameters and apply the electrical energy to the oil and gas pipeline 5 through the positive wire 42 and the negative wire 43. In this process, the oil and gas pipeline 5 is protected as a cathode, and the positive wire 42 connected to it is used as an anode. The external current will form a protective electric field on the surface of the oil and gas pipeline 5, which can inhibit or slow down the occurrence of the corrosion process, thereby extending the service life of the oil and gas pipeline. The whole process is a closed-loop system, starting from the oil and gas flow driving the rotating sleeve to rotate, to the generation and storage of electrical energy, and finally to the application to the oil and gas pipeline for cathodic protection. This impressed current cathodic protection device can effectively improve the corrosion resistance of oil and gas pipelines and ensure their long-term stable operation.

[0047] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An impressed current cathodic protection device for oil and gas pipeline corrosion protection, characterized in that: include: A driving assembly, the driving assembly comprising a first branch pipe, a second branch pipe, a rotating sleeve and a fan blade, one end of the first branch pipe and the second branch pipe are respectively connected to the oil and gas pipeline, two ends of the rotating sleeve are respectively rotatably connected to the other end of the first branch pipe and the second branch pipe, and the fan blade is coaxially fixed in the rotating sleeve; power supply; a rotating power generation assembly, the rotating power generation assembly being used to convert the rotation of the rotating sleeve into electrical energy and store it in the power source; and, A cathodic protection mechanism, the cathodic protection mechanism comprising a discharge controller, a positive wire and a negative wire, the input end of the discharge controller is electrically connected to the power supply, one end of the positive wire is electrically connected to the positive output end of the discharge controller, the other end of the positive wire is grounded, one end of the negative wire is electrically connected to the negative output end of the discharge controller, and the other end of the negative wire is electrically connected to the oil and gas pipeline.

2. The impressed current cathodic protection device for oil and gas pipeline corrosion protection according to claim 1, characterized in that: The oil and gas pipeline includes a first pipe section, an intermediate pipe section and a second pipe section, and the drive assembly also includes a first tee and a second tee, the first interface of the first tee is connected to the first pipe section, the second interface of the first tee is connected to one end of the intermediate pipe section, the third interface of the first tee is connected to one end of the first branch pipe, the first interface of the second tee is connected to the second pipe section, the second interface of the second tee is connected to the other end of the intermediate pipe section, and the third interface of the second tee is connected to one end of the second branch pipe.

3. The impressed current cathodic protection device for oil and gas pipeline corrosion protection according to claim 1, characterized in that: The first branch pipe and the second branch pipe are respectively provided with a first control valve and a second control valve.

4. The impressed current cathodic protection device for oil and gas pipeline corrosion protection according to claim 3, characterized in that: The rotating power generation component includes an outer sleeve, a power generation winding, two permanent magnets, two slip rings, two brushes and a charging controller. The two ends of the outer sleeve are respectively fixedly connected to the first shunt branch and the second shunt branch. The outer sleeve is located outside the rotating sleeve and is coaxially arranged with the rotating sleeve. The power generation winding is wound on the rotating sleeve. The two permanent magnets are respectively fixed on the inner wall of the outer sleeve and are respectively located on both sides of the rotating sleeve, and the two opposite sides of the two permanent magnets have opposite magnetic properties. The two slip rings are both fixed on the rotating sleeve and are respectively electrically connected to the two ends of the power generation winding. The two brushes are both fixed in the outer sleeve and are respectively abutted against the two slip rings. The two brushes are respectively electrically connected to the positive and negative poles of the input end of the charging controller, and the output end of the charging controller is electrically connected to the input end of the power supply.

5. The impressed current cathodic protection device for oil and gas pipeline corrosion protection according to claim 4, characterized in that: It also includes a solar charging component, which includes a plurality of columns, a ceiling and a photovoltaic panel. The columns are fixed to the ground, the ceiling is fixed to the upper ends of the columns and covers the top of the outer sleeve, the photovoltaic panel is fixed to the top surface of the ceiling, and the photovoltaic panel is electrically connected to the input end of the charging controller.

6. The impressed current cathodic protection device for oil and gas pipeline corrosion protection according to claim 5, characterized in that: The charging controller can obtain the output power of the photovoltaic panel, and the discharging controller can obtain the discharging power; The charging controller is electrically connected to the discharge controller, the first control valve and the second control valve, and when the power of the power source is lower than a first preset power, the charging controller stores the electric energy output by the photovoltaic panel into the power source; When the power level of the power supply is lower than a second preset power level and the output power of the photovoltaic panel is less than the discharge power of the discharge controller, the first control valve and the second control valve are opened, and the charging controller stores the electric energy generated by the rotating power generation component and the electric energy output by the photovoltaic panel into the power supply.

7. The impressed current cathodic protection device for oil and gas pipeline corrosion protection according to claim 1, characterized in that: A first limiting groove is formed at the other end of the first branch pipe, and a second limiting groove is formed at the other end of the second branch pipe. A first convex ring and a second convex ring are respectively formed at both ends of the rotating sleeve, and the first convex ring and the second convex ring are respectively embedded in the first limiting groove and the second limiting groove.

8. The impressed current cathodic protection device for oil and gas pipeline corrosion protection according to claim 1, characterized in that: The other end of the first branch pipe is sleeved with a first sealing ring, which is embedded between the outer wall of the first branch pipe and the inner wall of the rotating sleeve; the other end of the second branch pipe is sleeved with a second sealing ring, which is embedded between the outer wall of the second branch pipe and the inner wall of the rotating sleeve.

9. The impressed current cathodic protection device for oil and gas pipeline corrosion protection according to claim 1, characterized in that: The cathodic protection mechanism also includes an anode bed, which is buried under the ground, and the other end of the positive electrode wire is electrically connected to the anode bed.

10. The impressed current cathodic protection device for oil and gas pipeline corrosion protection according to claim 5, characterized in that: Also included are a number of monitors, which are arranged around the ceiling.

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