A device for automatic anticorrosion oiling inside of a circular hollow terminal

Abstract

This invention relates to the field of artificial intelligence technology, and in particular to an automatic anti-corrosion coating device for the interior of circular hollow terminals. It includes a conveyor belt and a frame. The coating structure includes a mounting frame, with a nozzle mounted at the bottom of the mounting frame. The nozzle has a spiral guide groove in its inner cavity, an anti-clogging structure at the spraying end, and an adjustment structure for adjusting the nozzle angle at the other end. An intelligent control system for controlling the spraying is installed within the frame. This invention, by setting an adjustment structure for the nozzle angle, allows the nozzle's inclination angle to be adjusted within the range of 15-30°. This allows for flexible adjustment of the nozzle according to the depth and shape of the terminal's inner wall. Three nozzles are evenly arranged at 120° intervals to ensure uniform coating coverage. This allows the device to adapt to terminal inner walls of different depths and shapes, overcoming the problems of uneven coating and missed areas affecting coating adhesion.

Description

Technical Field

[0001] This invention belongs to the technical field of battery manufacturing equipment, and specifically relates to an automatic anti-corrosion oiling device for the interior of circular hollow terminals. Background Technology

[0002] After the battery is assembled, it needs to undergo formation charging. During the formation charging process, electrolyte (dilute sulfuric acid) needs to be added. Since sulfuric acid is highly corrosive during formation charging, in order to prevent the terminals from being corroded during the formation process, the terminals need to be coated with anti-corrosion oil before adding acid.

[0003] Current technologies primarily employ manual coating, which presents the following problems: First, manual coating has blind spots: the internal structure of the terminal is cylindrical and hollow, leading to uneven coating on the inner walls; the terminal cavity is deep, making it difficult for manual coating to cover all areas; and there are dead corners on the inner walls that are difficult to reach manually, making it impossible to guarantee uniform coating thickness. Second, manual coating affects production efficiency: manual coating is slow, limiting subsequent acid-adding processes; coating quality is unstable, requiring repeated coating; acid can only be added after the oiling process is completed; uneven coating necessitates rework, wasting time. Third, manual coating does not provide sufficient corrosion protection: uneven coating results in insufficient corrosion protection in some areas; dead corners inside the terminal are easily missed; inconsistent coating thickness affects the corrosion protection effect; and corrosion is prone to occur during the formation process.

[0004] A search revealed that in the prior art, patent application CN110624719B4 discloses a steel pipe anti-corrosion paint spraying device, including an oil coating tank. The oil coating tank has an inlet isolation door and an outlet isolation door on both sides. Inside the oil coating tank are steel pipe conveying rollers, a U-shaped spray ring, and an annular air knife. Both the inlet and outlet isolation doors are constructed by cutting circular holes in the middle of double-layered steel plates for the steel pipe to enter and exit. A PVC membrane capable of sealing with the entering and exiting steel pipes is sandwiched between the two layers of steel plates. The U-shaped spray ring is located behind the inlet and includes an inverted U-shaped spray pipe, an oil inlet pipe connected to the spray pipe, and multiple angle-adjustable nozzles on the spray pipe. The annular air knife is located in front of the outlet and is connected to an air inlet pipe.

[0005] This equipment uses adjustable nozzles on the outside of a U-shaped tube to ensure uniform spraying of the steel pipe's exterior. Excess anti-corrosion paint is removed from the pipe's surface using compressed air, guaranteeing uniform coating without dripping and improving the pipe's appearance. However, when spraying inside the pipe, the deep inner cavity of the terminal makes it difficult to apply the paint completely. Dead corners can easily form on the inner wall, affecting the uniformity of the coating thickness and the anti-corrosion effect, making the formation process more prone to corrosion. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides an automatic anti-corrosion oiling device for the interior of circular hollow terminals. It includes a conveyor belt and a frame. The conveyor belt is mounted above the frame, and a positioning structure for positioning the terminals is fixed above the conveyor belt by screws. An oiling structure for applying oil to the terminals and a lifting structure for driving the oiling structure to rise and fall are provided above the frame.

[0007] The oiling structure includes a mounting frame, on the bottom of which a nozzle is mounted. The nozzles are arranged in three groups in a 120° circular array. The nozzles are tilted within a range of 15-30° relative to a vertical line. The inner cavity of the nozzle is provided with a spiral guide groove. The oil spraying end of the nozzle is provided with an anti-clogging structure. The other end of the nozzle is provided with an adjustment structure for adjusting the nozzle angle. An intelligent control system for controlling the oil spraying of the nozzles is installed inside the frame.

[0008] The anti-clogging structure includes an anti-clogging plate with equidistantly arranged micropores inside. The micropores penetrate the upper and lower surfaces of the anti-clogging plate. The spiral guide groove and the micropores cause the anti-corrosion oil to be sprayed out in a vortex shape. The inner cavity of the nozzle is provided with a rotation limiting structure to limit the movement of the anti-clogging plate. The intelligent control system includes a PLC control module, a pressure control module, and an execution module. The PLC control module is electrically connected to both the pressure control module and the execution module.

[0009] Furthermore, the adjustment structure includes a U-shaped seat, a rotating shaft is fixed to the outer wall of the nozzle, the rotating shaft passes through the U-shaped seat and is rotatably connected to the U-shaped seat, nuts are threaded to the outer walls of both ends of the rotating shaft, one side of the nut is in close contact with the outer wall of the U-shaped seat, and the anti-clogging plate is located at the end of the nozzle away from the rotating shaft.

[0010] Furthermore, the PLC control module includes a central processing unit (CPU), an input / output unit, a power supply unit, and a communication unit, wherein the central processing unit (CPU) is electrically connected to the input / output unit, the power supply unit, and the communication unit.

[0011] Furthermore, the pressure control module includes a signal conditioning circuit, an analog input circuit, a pressure feedback control algorithm, a data recording and storage unit, and a feedback unit. The signal conditioning circuit is electrically connected to the analog input circuit, the pressure feedback control algorithm, the data recording and storage unit, and the feedback unit.

[0012] The feedback unit includes a pressure sensor, a human-machine interface, and an alarm component, with the human-machine interface and the alarm component being electrically connected.

[0013] Furthermore, the execution module includes a signal receiving unit and an execution unit. The execution unit includes a solenoid valve and an oil supply pump. The oil inlet end of the nozzle is fixedly connected to the oil supply pump through the nozzle oil supply pipeline. The solenoid valve is installed on the oil supply pipeline of the nozzle.

[0014] Furthermore, the positioning structure includes a mounting platform, which is fixedly connected to the conveyor belt by screws. An electric gripper for clamping the outer wall of the terminal is installed above the mounting platform. The electric gripper is electrically connected to the PLC control module. There are four sets of mounting platforms arranged in a linear array.

[0015] Furthermore, the rotation limiting structure includes a positioning shaft and a positioning pin. One end of the positioning shaft is fixedly connected to the outer wall of the anti-clogging plate. The inner cavity of the nozzle has a clearance groove, and the positioning shaft is rotatably connected in the clearance groove. The outer wall of the positioning shaft has a positioning hole. One end of the positioning pin passes through the outer wall of the nozzle and is inserted into the positioning hole. The other end of the positioning pin is threaded with a positioning screw, and the upper surface of the positioning screw is in close contact with the outer wall of the nozzle.

[0016] Furthermore, the lifting structure includes a cylinder, a guide rod, and a positioning sensor. The cylinder and the guide rod are both fixedly connected to the frame by screws. A lifting plate is fixed to the telescopic end of the cylinder. A fuel injection frame is fixed to one side of the lifting plate. The guide rod passes through the lifting plate and is slidably connected to the lifting plate. The mounting bracket and the positioning sensor are both fixed to the bottom of the fuel injection frame.

[0017] The beneficial effects of this invention are:

[0018] 1. This invention, by setting an adjustment structure for adjusting the nozzle angle, allows the nozzle inclination angle to be adjusted within the range of 15-30°. The nozzle can be flexibly adjusted according to the depth and shape of the inner wall of the terminal. The three nozzles are evenly arranged at 120° to ensure uniform spray coverage. This allows the device to adapt to the inner walls of terminals of different depths and shapes, overcoming the problems of uneven coating and missed coating affecting the adhesion of the coating.

[0019] 2. By setting a spiral guide groove and a multi-level micro-pore array inside the nozzle, a vortex effect can be generated. The vortex spraying of oil ensures that the anti-corrosion oil is evenly sprayed on the inner wall of the terminal, enhancing the uniformity of the coating and avoiding omissions or repeated coating in dead corner areas.

[0020] 3. By setting up an anti-clogging structure, the nozzle is less likely to become clogged due to high viscosity or impurities during the spraying process of the anti-corrosion oil, ensuring a smooth spraying process. At the same time, the spiral guide groove design can guide the anti-corrosion oil to form a vortex inside the nozzle, reducing oil retention inside the nozzle, preventing oil solidification, and also reducing the probability of clogging. This reduces the frequency of equipment maintenance, improves the reliability and stability of the equipment, and avoids downtime caused by nozzle clogging.

[0021] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A system block diagram according to an embodiment of the present invention is shown;

[0024] Figure 2 A structural diagram of the entire machine according to an embodiment of the present invention is shown;

[0025] Figure 3 A positioning structure diagram for terminal positioning according to an embodiment of the present invention is shown;

[0026] Figure 4 A diagram showing the arrangement of three nozzles according to an embodiment of the present invention is provided;

[0027] Figure 5 A schematic diagram of the spiral guide groove structure inside the nozzle according to an embodiment of the present invention is shown;

[0028] Figure 6 A schematic diagram of the nozzle adjustment structure according to an embodiment of the present invention is shown;

[0029] Figure 7 A schematic diagram of the anti-clogging structure according to an embodiment of the present invention is shown;

[0030] Figure 8 A diagram showing the relative positions of the terminal to be sprayed and the nozzle according to an embodiment of the present invention is provided.

[0031] In the diagram: 1. Conveyor belt; 2. Frame; 3. Positioning structure; 4. Oiling structure; 401. Mounting bracket; 402. Nozzle; 403. Spiral guide groove; 5. Anti-clogging structure; 6. Adjustment structure; 7. Lifting structure; 501. Anti-clogging plate; 502. Rotation limit structure; 601. U-shaped seat; 602. Rotating shaft; 603. Nut; 503. Micro-hole; 301. Mounting platform; 302. Electric gripper; 5021. Positioning shaft; 5022. Positioning pin; 5023. Clearance groove; 5024. Positioning hole; 5025. Positioning screw; 701. Cylinder; 702. Guide rod; 703. Lifting plate; 704. Oil spraying frame; 8. Positioning sensor. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figure 1-8 The present invention provides a technical solution:

[0034] This invention provides an automatic anti-corrosion oiling device for the interior of a circular hollow terminal. It includes a conveyor belt 1 and a frame 2. The conveyor belt 1 is mounted above the frame 2. A positioning structure 3 for positioning the terminal is fixed above the conveyor belt 1 by screws. An oiling structure 4 for oiling the terminal and a lifting structure 7 for driving the oiling structure 4 to rise and fall are provided above the frame 2.

[0035] The terminals are transported to the spraying station via conveyor belt 1. The frame 2 fixes the spray head 402 and the intelligent control system to ensure the stability of the spraying process. The lifting structure 7 allows the spray head 402 to move up and down, facilitating the spraying operation.

[0036] The oiling structure 4 includes a mounting frame 401, on the bottom of which a nozzle 402 is mounted. The nozzle 402 is arranged in three groups in a 120° circular array. The inclination of the nozzle 402 relative to the vertical line is in the range of 15-30°. The inner cavity of the nozzle 402 is provided with a spiral guide groove 403. The oil spraying end of the nozzle 402 is provided with an anti-clogging structure 5. The other end of the nozzle 402 is provided with an adjustment structure 6 for adjusting the angle of the nozzle 402. The frame 2 is provided with an intelligent control system for controlling the oil spraying of the nozzle 402.

[0037] During the spraying process, the anti-corrosion oil may cause nozzle clogging of the spray head 402 due to its high viscosity or impurities. The anti-clogging structure 5 effectively prevents this from happening, ensuring a smooth spraying process. The anti-clogging structure 5 reduces equipment maintenance frequency, improves equipment reliability and stability, avoids downtime caused by nozzle clogging, extends nozzle lifespan by preventing clogging, reduces replacement frequency, and lowers maintenance costs.

[0038] The nozzle 402 has a spiral guide groove 403 inside, which can guide the flow of anti-corrosion oil, reduce the retention of oil inside the nozzle, and prevent the oil from solidifying or impurities from accumulating.

[0039] The intelligent control system monitors parameters such as spraying pressure and nozzle angle in real time through pressure sensors, and controls and adjusts the spraying process through feedback units to ensure coating quality.

[0040] The anti-clogging structure 5 includes an anti-clogging plate 501, in which micro-holes 503 are arranged in an equidistant array. The micro-holes 503 penetrate the upper and lower surfaces of the anti-clogging plate 501. The spiral guide groove 403 and the micro-holes 503 cause the anti-corrosion oil to be sprayed out in a vortex shape. The inner cavity of the nozzle 402 is provided with a rotation limiting structure 502 to limit the anti-clogging plate 501. The intelligent control system includes a PLC control module, a pressure control module, and an execution module. The PLC control module is electrically connected to both the pressure control module and the execution module.

[0041] The modules are connected by signals to ensure the real-time and accurate transmission of information.

[0042] The PLC control module can monitor the pressure of each nozzle 402 in real time. Through pressure synchronization control, it ensures that the spraying pressure of each nozzle 402 is consistent, avoiding uneven coating thickness. The nozzle of the nozzle 402 is designed with an anti-clogging structure 5 to ensure that the nozzle will not be clogged by the solidification of anti-corrosion oil or impurities during long-term use.

[0043] The adjustment structure 6 includes a U-shaped seat 601. A rotating shaft 602 is fixed to the outer wall of the nozzle 402. The rotating shaft 602 passes through the U-shaped seat 601 and is rotatably connected to the U-shaped seat 601. Nuts 603 are threadedly connected to the outer walls of both ends of the rotating shaft 602. One side of the nut 603 is in close contact with the outer wall of the U-shaped seat 601. The anti-clogging plate 501 is located at the end of the nozzle 402 away from the rotating shaft 602.

[0044] The PLC control module includes a central processing unit (CPU), an input / output unit, a power supply unit, and a communication unit. The CPU is electrically connected to the input / output unit, the power supply unit, and the communication unit.

[0045] The PLC control module is responsible for executing the control program, processing input signals, and outputting control commands. Based on the preset program and real-time feedback data, it controls each stage of the spraying process. The input unit receives signals from devices such as pressure sensors, buttons, and switches, while the output unit sends control signals to the actuators (such as motors, solenoid valves, and nozzles 402) to control the angle of nozzles 402, spraying pressure, and the speed of conveyor belt 1.

[0046] The pressure control module includes a signal conditioning circuit, an analog input circuit, a pressure feedback control algorithm, a data recording and storage unit, and a feedback unit. The signal conditioning circuit is electrically connected to the analog input circuit, the pressure feedback control algorithm, the data recording and storage unit, and the feedback unit.

[0047] The feedback unit includes a pressure sensor, a human-machine interface (HMI), and an alarm component. The HMI and the alarm component are electrically connected. The pressure feedback control algorithm running within the PLC automatically adjusts the pressure of the spraying system based on real-time pressure data to ensure that the pressure of each nozzle 402 remains consistent. If the pressure of a nozzle 402 deviates from the set value, the control algorithm automatically adjusts the pressure of the oil supply pump or the opening of the nozzle 402 to ensure that the pressure returns to the normal range and to prevent uneven coating thickness.

[0048] The execution module includes a signal receiving unit and an execution unit. The execution unit includes a solenoid valve and an oil supply pump. The oil inlet end of the nozzle 402 is fixedly connected to the oil supply pump through the oil supply pipeline of the nozzle 402. The solenoid valve is installed on the oil supply pipeline of the nozzle 402.

[0049] The anti-clogging plate 501 has micropores 503 inside, the micropores 503 penetrate the upper and lower surfaces of the anti-clogging plate 501, and the micropores 503 are arranged in an equidistant array.

[0050] The nozzle 402 has a multi-stage micro-orifice array 503 at the nozzle outlet. The size and distribution of these micro-orifices 503 are optimized to prevent large particles of impurities from entering the nozzle 402, while ensuring that the anti-corrosion oil is sprayed out in a fine mist.

[0051] The built-in spiral guide groove 403 and multi-level micro-pore 503 array can generate a vortex effect, ensuring that the anti-corrosion oil is sprayed out in a fine mist, avoiding the coating being too thick or too thin, and ensuring uniform spray coverage.

[0052] The nozzle 402 is provided in three sets, and the three sets of nozzles 402 are arranged in a circular array. The nozzles 402 are tilted with respect to the vertical line within the range of 15-30°.

[0053] Three nozzles 402 are evenly arranged at 120° to ensure uniform spray coverage. The inward tilt angle of the nozzles 402 is adjustable from 15-30°, depending on the depth and shape of the terminal cavity. The operator can manually adjust the angle of the nozzles 402 by manually rotating the fixing device of the nozzles 402. A smaller inward tilt angle (such as 15°) is suitable for shallower terminal cavities, with a narrower spray range, suitable for fine spraying. A larger inward tilt angle (such as 30°) is suitable for deeper terminal cavities, with a wider spray range, covering a deeper area and ensuring the best spraying effect. The inward tilt angle, combined with the design of the spiral guide groove 403, allows the anti-corrosion oil to be evenly distributed on the inner wall of the terminal, ensuring a consistent coating thickness.

[0054] The positioning structure 3 includes a mounting platform 301, which is fixedly connected to the conveyor belt 1 by screws. An electric gripper 302 for clamping the outer wall of the terminal is installed above the mounting platform 301. The electric gripper 302 is electrically connected to the PLC control module. There are four sets of mounting platforms 301 arranged in a linear array.

[0055] The device is designed as a four-station parallel operation structure, which can process multiple terminals at the same time, improving production efficiency. The terminal tube is clamped in the electric gripper 302 and moved to the oil spraying position with the conveyor belt 1.

[0056] The rotation limiting structure 502 includes a positioning shaft 5021 and a positioning pin 5022. One end of the positioning shaft 5021 is fixedly connected to the outer wall of the anti-clogging plate 501. The inner cavity of the nozzle 402 is provided with a clearance groove 5023. The positioning shaft 5021 is rotatably connected in the clearance groove 5023. The outer wall of the positioning shaft 5021 is provided with a positioning hole 5024. One end of the positioning pin 5022 passes through the outer wall of the nozzle 402 and is inserted into the positioning hole 5024. The other end of the positioning pin 5022 is threadedly connected to a positioning screw 5025. The upper surface of the positioning screw 5025 is in close contact with the outer wall of the nozzle 402.

[0057] By setting a rotating structure, when the positioning pin 5022 is pulled out, the anti-blocking plate 501 can rotate, so that the anti-blocking plate 501 can be flipped over, making it easier for the operator to scrape off the oil stains on one side of the anti-blocking plate 501.

[0058] The lifting structure 7 includes a cylinder 701, a guide rod 702, and a positioning sensor 8. The cylinder 701 and the guide rod 702 are both fixedly connected to the frame 2 by screws. A lifting plate 703 is fixed to the telescopic end of the cylinder 701. A fuel injector frame 704 is fixed to one side of the lifting plate 703. The guide rod 702 passes through the lifting plate 703 and is slidably connected to the lifting plate 703. The mounting bracket 401 and the positioning sensor 8 are both fixed to the bottom of the fuel injector frame 704.

[0059] In use, the terminals are held in the electric gripper 302 and conveyed by the conveyor belt 1. The positioning sensor 8 ensures that each terminal accurately reaches the spraying position. The positioning sensor 8 is electrically connected to the PLC control module. When the positioning sensor 8 senses that the material has moved to the spraying position below the nozzle 402, the cylinder 701 drives the lifting plate 703 and the connecting plate to move downwards, inserting the nozzle 402 into the terminal tube. The PLC control module controls the pressure spraying of the oil pump. The pressure feedback control algorithm running inside the PLC is responsible for automatically adjusting the pressure of the spraying system based on real-time pressure data to ensure that the pressure of each nozzle 402 is consistent. If the pressure of a nozzle 402 deviates from the set value, the control algorithm will automatically adjust the pressure of the oil pump or the opening of the nozzle 402 to ensure that the pressure returns to the normal range and avoids uneven coating thickness. When the positioning pin 5022 is pulled out, the anti-clogging plate 501 can rotate, allowing the anti-clogging plate 501 to flip over, making it easier for the operator to scrape off the oil on one side of the anti-clogging plate 501, reducing the probability of clogging.

[0060] The nozzle 402 of this invention has an adjustable inclination angle within the range of 15-30°, which can flexibly adjust the nozzle 402 according to the depth and shape of the inner wall of the terminal. The nozzle 402 is equipped with a spiral guide groove 403 and a multi-level micro-hole array 503, which can generate a vortex effect. The vortex spraying of oil ensures that the anti-corrosion oil is evenly sprayed on the inner wall of the terminal, enhances the uniformity of the coating, reduces the retention of oil inside the nozzle, and improves the reliability and stability of the equipment.

[0061] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic anti-corrosion oiling device for the interior of a circular hollow terminal, characterized in that: Includes a conveyor belt (1) and a frame (2). The conveyor belt (1) is installed above the frame (2). A positioning structure (3) for positioning terminals is fixed above the conveyor belt (1) by screws. An oiling structure (4) for applying oil to terminals and a lifting structure (7) for driving the oiling structure (4) to rise and fall are provided above the frame (2). The oiling structure (4) includes a mounting bracket (401), and a nozzle (402) is mounted on the bottom of the mounting bracket (401). The nozzle (402) is arranged in three groups and distributed in a 120° circumferential array. The inclination of the nozzle (402) relative to the vertical line is in the range of 15-30°. The inner cavity of the nozzle (402) is provided with a spiral guide groove (403). The oil spraying end of the nozzle (402) is provided with an anti-clogging structure (5). The other end of the nozzle (402) is provided with an adjustment structure (6) for adjusting the angle of the nozzle (402). The frame (2) is provided with an intelligent control system for controlling the oil spraying of the nozzle (402). The anti-clogging structure (5) includes an anti-clogging plate (501), in which micro-holes (503) are arranged in an equidistant array. The micro-holes (503) penetrate the upper and lower surfaces of the anti-clogging plate (501). The spiral guide groove (403) and the micro-holes (503) cause the anti-corrosion oil to be sprayed out in a vortex. The inner cavity of the nozzle (402) is provided with a rotation limiting structure (502) to limit the anti-clogging plate (501). The intelligent control system includes a PLC control module, a pressure control module and an execution module. The PLC control module is electrically connected to the pressure control module and the execution module.

2. The automatic anti-corrosion oiling device for the interior of a circular hollow terminal according to claim 1, characterized in that: The adjustment structure (6) includes a U-shaped seat (601), and a rotating shaft (602) is fixed on the outer wall of the nozzle (402). The rotating shaft (602) passes through the U-shaped seat (601) and is rotatably connected to the U-shaped seat (601). Nuts (603) are threadedly connected to the outer walls of both ends of the rotating shaft (602). One side of the nut (603) is close to the outer wall of the U-shaped seat (601). The anti-clogging plate (501) is located at the end of the nozzle (402) away from the rotating shaft (602).

3. The automatic anti-corrosion oiling device for the interior of a circular hollow terminal according to claim 2, characterized in that: The PLC control module includes a central processing unit (CPU), an input / output unit, a power supply unit, and a communication unit. The central processing unit (CPU) is electrically connected to the input / output unit, the power supply unit, and the communication unit.

4. The automatic anti-corrosion oiling device for the interior of a circular hollow terminal according to claim 3, characterized in that: The pressure control module includes a signal conditioning circuit, an analog input circuit, a pressure feedback control algorithm, a data recording and storage unit, and a feedback unit. The signal conditioning circuit is electrically connected to the analog input circuit, the pressure feedback control algorithm, the data recording and storage unit, and the feedback unit. The feedback unit includes a pressure sensor, a human-machine interface, and an alarm component, with the human-machine interface and the alarm component being electrically connected.

5. The automatic anti-corrosion oiling device for the interior of a circular hollow terminal according to claim 4, characterized in that: The execution module includes a signal receiving unit and an execution unit. The execution unit includes a solenoid valve and an oil supply pump. The oil inlet end of the nozzle (402) is fixedly connected to the oil supply pump through the oil supply pipeline of the nozzle (402). The solenoid valve is installed on the oil supply pipeline of the nozzle (402).

6. The automatic anti-corrosion oiling device for the interior of a circular hollow terminal according to claim 1, characterized in that: The positioning structure (3) includes a mounting platform (301), which is fixedly connected to the conveyor belt (1) by screws. An electric gripper (302) for clamping the outer wall of the terminal is installed on the top of the mounting platform (301). The electric gripper (302) is electrically connected to the PLC control module. There are four sets of mounting platforms (301), which are arranged in a linear array.

7. The automatic anti-corrosion oiling device for the interior of a circular hollow terminal according to claim 1, characterized in that: The rotation limiting structure (502) includes a positioning shaft (5021) and a positioning pin (5022). One end of the positioning shaft (5021) is fixedly connected to the outer wall of the anti-clogging plate (501). The inner cavity of the nozzle (402) is provided with a relief groove (5023). The positioning shaft (5021) is rotatably connected in the relief groove (5023). The outer wall of the positioning shaft (5021) is provided with a positioning hole (5024). One end of the positioning pin (5022) penetrates the outer wall of the nozzle (402) and is inserted into the positioning hole (5024). The other end of the positioning pin (5022) is threaded with a positioning screw (5025). The upper surface of the positioning screw (5025) is in close contact with the outer wall of the nozzle (402).

8. The automatic anti-corrosion oiling device for the interior of a circular hollow terminal according to claim 1, characterized in that: The lifting structure (7) includes a cylinder (701), a guide rod (702) and a positioning sensor (8). The cylinder (701) and the guide rod (702) are both fixedly connected to the frame (2) by screws. The extension end of the cylinder (701) is fixed with a lifting plate (703). A fuel injector frame (704) is fixed on one side of the lifting plate (703). The guide rod (702) passes through the lifting plate (703) and is slidably connected to the lifting plate (703). The mounting bracket (401) and the positioning sensor (8) are both fixed at the bottom of the fuel injector frame (704).

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