Wet-plugging connector plug oil charging device and control method thereof

Abstract

The invention discloses a connector, and aims to provide an oil charging device for a plug of a wet-plugging connector and a control method of the oil charging device, which are simple to operate, uniform in oil charging, capable of preventing air residue after oil charging and capable of realizing accurate and efficient oil charging. According to the technical scheme, an oil filling device fills oil into a plug through an oil tank, an oil supply pipeline, an exhaust pipeline, a control unit and a plug fixing mechanism, insulating oil in the oil tank is injected into the plug through the oil supply pipeline, and after the oil is injected, air in the plug is exhausted through the exhaust pipeline. The exhaust pipeline is provided with the one-way valve, the one-way valve can prevent insulating oil in the plug from entering the exhaust pipeline after air is exhausted, and the air in the plug is exhausted through the exhaust pipeline before oil filling, so that the oil filling efficiency is improved, and air residue can be prevented; the invention is suitable for the technical field of connector manufacturing.

Description

Technical Field

[0001] This invention relates to a connector, and more specifically, to a wet-plug connector plug oil filling device and its control method. Background Technology

[0002] Wet plug connectors are widely used in special environments such as marine engineering and underwater equipment. They can be plugged and unplugged while energized. However, due to the special nature of the working environment, the plug of a wet plug connector needs to be filled with insulating oil to ensure electrical and sealing performance.

[0003] Existing oil-filling devices and methods have several shortcomings: Firstly, it is difficult to precisely control the oil quantity and filling speed during the filling process, which can easily lead to uneven or excessive oil filling, affecting the performance of the connector. Secondly, internal air cannot be effectively expelled during the filling process, and residual air can affect the insulation effect and may even cause serious problems such as electrical breakdown. In addition, the operation of existing devices is relatively complex, with low automation and low production efficiency.

[0004] Therefore, during the process of filling the plug with oil, it is necessary to precisely control the amount of oil injected, and at the same time, it is necessary to expel the air inside the plug. Currently, there is no device on the market that can simply and efficiently fill the plug with oil. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a wet-plug connector plug oil filling device and its control method that is simple to operate, provides uniform oil filling, prevents air residue after oil filling, and achieves precise and efficient oil filling.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an oil filling device for a wet-plug connector plug, comprising an oil tank for storing insulating oil;

[0007] Fuel supply line: One end of the fuel supply line is connected to the fuel tank, and the other end is equipped with a plug;

[0008] Exhaust pipe: Connected to the inside of the plug, used to exhaust air;

[0009] Control unit: Used to control the oil filling process;

[0010] A plug fixing mechanism is used to secure the plug.

[0011] The present invention is further configured such that: the oil supply pipeline is equipped with a flow sensor and a pressure sensor, and transmits detection information to the control unit, and the control unit adjusts the speed and oil filling amount of the oil filling device based on the detection value.

[0012] The invention is further configured such that: a one-way valve is provided on the exhaust pipe, the one-way valve being configured to prevent hydraulic oil backflow.

[0013] The present invention is further configured such that: the plug fixing mechanism includes a clamp and a positioning pin, the plug is provided with a fixing hole, and when the clamp is installed in the positioning pin, the position of the fixing hole matches the position of the positioning pin.

[0014] The present invention is further configured such that: one end of the plug oil filling device is provided with an oil supply pump, and the other end of the plug oil filling device is provided with a sealing structure, the sealing structure including a plug fixture and an airtight fixture disposed on the plug fixture, the sealing structure being used to maintain a seal during the oil filling process.

[0015] This application also discloses a control method for an oil filling device for a wet plug connector plug, including the following steps: S1, installing the wet plug connector plug to be filled with oil in the clamp of the plug fixing mechanism;

[0016] S2. Start the vacuum pump and extract the air from inside the oil filling device through the exhaust pipe. Set the working negative pressure value to P0 and simultaneously detect the pressure inside the oil filling device. The detected value is P.

[0017] S3. If P > P0, it is determined that the current internal pressure has not reached the set value, and the oil filling device continues to be evacuated; otherwise, it is determined that the current internal pressure has reached the preset value, and the process jumps to S4 to continue control.

[0018] S4. The control unit controls the oil in the oil tank to enter the plug through the oil supply line to fill the oil filling device with oil.

[0019] S5. Set the flow rate and pressure of the oil in the oil supply line to L0 and Y0 respectively during the oil filling process. During the oil filling process, the flow sensor and pressure sensor detect the flow rate and pressure of the oil, and the detected values ​​are L and Y, and the data are uploaded to the control unit.

[0020] S6. The control unit detects the data. If L0 < L or Y0 < Y, it is determined that the oil flow rate or velocity in the current oil supply line is too high. The control unit reduces the speed of the oil supply pump. Conversely, if L0 > L or Y0 > Y, it is determined that the oil flow rate or velocity in the current oil supply line is too low. The control unit increases the speed of the oil supply pump.

[0021] S7. The control unit detects the amount of oil inside the oil filling device. The detection value is X. If X < 100%, it is determined that the oil filling is not complete, and the control unit continues to fill the oil filling device. Otherwise, it is determined that the oil filling is complete, and the control unit stops the oil supply pump and vacuum pump to complete the oil filling. The completed oil filling device is then subjected to quality inspection.

[0022] Preferably, step S7 further includes staged oil filling control, including the following steps S71: setting the speed of the oil supply pump to fast, medium and slow speeds;

[0023] S72. The oil level inside the oil filling device is detected. The detected value is X0. If X0 < 50%, the control center controls the oil supply pump to run at high speed. If 50% < X0 < 70%, the control center controls the oil pump to run at medium speed. If 70% < X0 < 100%, the control center controls the oil pump to run at slow speed until X0 = 100%.

[0024] By adopting the above technical solution, the beneficial effects are as follows: 1. The oil filling device of this application fills the plug with oil through an oil tank, an oil supply pipeline, an exhaust pipeline, a control unit, and a plug fixing mechanism. The insulating oil in the oil tank is injected into the plug through the oil supply pipeline. After the oil is injected, the air inside the plug is discharged through the exhaust pipeline, forming a complete structure for filling the plug with oil. At the same time, a one-way valve is provided on the exhaust pipeline. The one-way valve can prevent the insulating oil inside the plug from entering the exhaust pipeline after the air is discharged. Before filling with oil, the air inside the plug is discharged through the exhaust pipeline, which improves the efficiency of oil filling and prevents the residue of air.

[0025] 2. Furthermore, the oil supply pipeline of this application is equipped with a flow sensor and a pressure sensor. The flow sensor can detect the oil filling flow rate in real time, and the pressure sensor can detect the oil supply pressure in real time. The control unit compares the detected data with preset values ​​to accurately control the oil filling parameters. This can effectively avoid the impact on the oil supply pipeline caused by excessively fast oil filling speed or excessive flow rate, which could generate air bubbles and cause air to be generated inside the plug. Alternatively, it can avoid the oil filling efficiency being low due to excessively slow oil filling speed or insufficient flow rate. This ensures that the oil can completely fill the inside of the plug during the oil filling process, ensuring the insulation effect inside the plug and the service life of the plug, and improving the stability of the plug during long-term use.

[0026] 3. In this application, the control unit uses a PLC as the core control component. Pre-set oil filling parameters (such as target oil volume and filling speed) allow the control unit to adjust the working status of the oil supply pump and vacuum pump in real time based on data from the flow sensor and pressure sensor, ensuring the stability and accuracy of the oil filling process. Specifically, before oil filling, a vacuum is created in the oil-filling chamber through the vacuum pump and check valve on the exhaust pipe, causing the pressure inside the plug to reach a preset negative pressure value. This operation effectively removes excess air from the plug. The check valve prevents oil from entering the exhaust pipe. During the oil filling process, the process of venting, filling, and continuously venting injects insulating oil into the plug while preventing air from remaining inside, essentially eliminating the risk of partial discharge or electrical breakdown caused by residual air, and significantly improving the product's safety and service life.

[0027] 4. Furthermore, during the lubrication process of the plug, a plug fixing mechanism is provided to secure the plug before lubrication. During the lubrication process, the oil supply pump has three operating speeds, each based on the current amount of oil inside the plug. Specifically, to improve lubrication efficiency while ensuring stability, the pump speed is controlled based on the amount of oil inside the plug. When the amount of oil needed is less than 50%, a larger amount is required, and the pump operates rapidly. This ensures high efficiency in lubrication of the plug while maintaining oil flow and pressure. Similarly, as the amount of insulating oil inside the plug increases, to ensure the accuracy of the filling amount, the speed of the oil supply pump is reduced to ensure stable filling of the insulating oil, thus optimizing the oil supply curve. This ensures both filling quality and high filling efficiency. By detecting the amount of oil inside the opaque plug, errors caused by manual operation are avoided, ensuring the pass rate during large-scale production. At the same time, this application can adjust the filling parameters according to specifications, improving the versatility of the equipment. Through precise flow and pressure control, it can ensure that the insulating oil is evenly filled into all parts inside the plug, improving the electrical performance and reliability of the connector. Attached Figure Description

[0028] Figure 1 This is a cross-sectional view of a specific structure of an embodiment of a wet-plug connector plug oil filling device and its control method according to the present invention;

[0029] Figure 2 This is a flowchart illustrating the control method of an embodiment of the wet-plug connector plug oil filling device and its control method according to the present invention.

[0030] Figure 3 This is a flowchart of a staged oil filling control method according to an embodiment of a wet-plug connector plug oil filling device and its control method of the present invention.

[0031] The attached diagram is labeled as follows: 1. Oil supply line; 2. Exhaust line; 21. Check valve; 3. Plug fixing mechanism; 31. Clamp; 32. Positioning pin; 33. Sealing structure; 331. Plug fixture; 332. Airtight fixture. Detailed Implementation

[0032] Reference Figures 1 to 3 The embodiments of the wet-plug connector plug oil filling device and its control method of the present invention are further described.

[0033] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “down” of other elements or features would be positioned “up” of those other elements or features. Therefore, the exemplary term “down” can encompass both up and down orientations. The device may be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0034] Moreover, relational terms such as “first” and “second” are used merely to distinguish one component from another that has the same name, without necessarily requiring or implying any such actual relationship or order between the components.

[0035] An oil filling device for a wet-plug connector plug includes an oil tank for storing insulating oil.

[0036] Fuel supply line 1: One end of the fuel supply line 1 is connected to the fuel tank, and the other end is equipped with a plug;

[0037] Exhaust pipe 2: Connects to the inside of the plug and is used to exhaust air;

[0038] Control unit: Used to control the oil filling process;

[0039] The plug fixing mechanism 3 is used to fix the plug.

[0040] The oil supply line 1 is equipped with a flow sensor and a pressure sensor, and transmits the detection information to the control unit. The control unit adjusts the speed and amount of oil filling device based on the detection values.

[0041] The exhaust pipe 2 is also equipped with a one-way valve 21, which is configured to prevent hydraulic oil backflow.

[0042] The plug fixing mechanism 3 includes a clamp 31 and a positioning pin 32. The plug has a fixing hole. When the clamp 31 is installed in the positioning pin 32, the position of the fixing hole matches the position of the positioning pin 32.

[0043] The plug oil filling device is provided with an oil supply pump at one end and a sealing structure 33 at the other end. The sealing structure 33 includes a plug fixture 331 and an airtight fixture 332 disposed on the plug fixture 331. The sealing structure 33 is used to maintain a seal during the oil filling process.

[0044] This application also discloses a control method for an oil filling device for a wet plug connector plug, including the following steps: S1, installing the wet plug connector plug to be filled with oil in the clamp of the plug fixing mechanism;

[0045] S2. Start the vacuum pump and extract the air from inside the oil filling device through the exhaust pipe. Set the working negative pressure value to P0 and simultaneously detect the pressure inside the oil filling device. The detected value is P.

[0046] S3. If P > P0, it is determined that the current internal pressure has not reached the set value, and the oil filling device continues to be evacuated; otherwise, it is determined that the current internal pressure has reached the preset value, and the process jumps to S4 to continue control.

[0047] S4. The control unit controls the oil in the oil tank to enter the plug through the oil supply line to fill the oil filling device with oil.

[0048] S5. Set the flow rate and pressure of the oil in the oil supply line to L0 and Y0 respectively during the oil filling process. During the oil filling process, the flow sensor and pressure sensor detect the flow rate and pressure of the oil, and the detected values ​​are L and Y, and the data are uploaded to the control unit.

[0049] S6. The control unit detects the data. If L0 < L or Y0 < Y, it is determined that the oil flow rate or velocity in the current oil supply line is too high. The control unit reduces the speed of the oil supply pump. Conversely, if L0 > L or Y0 > Y, it is determined that the oil flow rate or velocity in the current oil supply line is too low. The control unit increases the speed of the oil supply pump.

[0050] S7. The control unit detects the amount of oil inside the oil filling device. The detection value is X. If X < 100%, it is determined that the oil filling is not complete, and the control unit continues to fill the oil filling device. Otherwise, it is determined that the oil filling is complete, and the control unit stops the oil supply pump and vacuum pump to complete the oil filling. The completed oil filling device is then subjected to quality inspection.

[0051] Preferably, step S7 further includes staged oil filling control, including the following steps S71: setting the speed of the oil supply pump to fast, medium and slow speeds;

[0052] S72. The oil level inside the oil filling device is detected. The detected value is X0. If X0 < 50%, the control center controls the oil supply pump to run at high speed. If 50% < X0 < 70%, the control center controls the oil pump to run at medium speed. If 70% < X0 < 100%, the control center controls the oil pump to run at slow speed until X0 = 100%.

[0053] The oil filling device of this application fills the plug with oil through an oil tank, an oil supply line 1, an exhaust line 2, a control unit, and a plug fixing mechanism 3. The insulating oil in the oil tank is injected into the plug through the oil supply line 1. After the oil is injected, the air inside the plug is discharged through the exhaust line 2, forming a complete structure for filling the plug with oil. At the same time, the exhaust line 2 is equipped with a one-way valve 21. The one-way valve 21 can prevent the insulating oil inside the plug from entering the exhaust line 2 after the air is discharged. Before filling with oil, the air inside the plug is discharged through the exhaust line 2, which improves the efficiency of oil filling and prevents the residue of air.

[0054] Furthermore, the oil supply line 1 of this application is equipped with a flow sensor and a pressure sensor. The flow sensor can detect the oil filling flow rate in real time, and the pressure sensor can detect the oil supply pressure in real time. The control unit compares the detected data with preset values ​​to accurately control the oil filling parameters. This can effectively prevent the oil filling speed from being too fast or the flow rate from impacting the oil supply line 1, thereby generating air bubbles that cause air to be generated inside the plug, or the oil filling speed from being too slow or the flow rate from being too small, resulting in low oil filling efficiency. This ensures that the oil can completely fill the inside of the plug during the oil filling process, ensuring the insulation effect inside the plug and the service life of the plug, and improving the stability of the plug during long-term use.

[0055] Meanwhile, in this application, the control unit uses a PLC as the core control component, and pre-sets oil filling parameters (such as target oil volume, oil filling speed, etc.). The control unit adjusts the working status of the oil supply pump and vacuum pump in real time according to the data fed back by the flow sensor and pressure sensor to ensure the stability and accuracy of the oil filling process. Specifically, before oil filling, the vacuum pump on the exhaust pipe 2 and the one-way valve 21 are used to evacuate the chamber to be filled, so that the pressure inside the plug reaches the preset negative pressure value. The above operation can effectively remove excess air from the plug. The one-way valve 21 can prevent oil from entering the exhaust pipe 2. During the oil filling process, through exhaust-oil filling-continuous exhaust, insulating oil is injected into the plug while preventing air from inside the plug. This basically eliminates the hidden danger of partial discharge or electrical breakdown caused by residual air, and greatly improves the safety and service life of the product.

[0056] Furthermore, during the lubrication process of the plug, a plug fixing mechanism 3 is provided to secure the plug before lubrication. During the lubrication process, the oil supply pump has three operating speeds, each based on the current amount of oil inside the plug. Specifically, to improve lubrication efficiency while ensuring stability, the pump speed is controlled based on the amount of oil inside the plug. When the amount of oil needed is less than 50%, a larger amount is required, and the pump operates rapidly. This ensures high efficiency in lubrication of the plug while maintaining oil flow and pressure. Similarly, as the amount of insulating oil inside the plug increases, to ensure the accuracy of the filling amount, the speed of the oil supply pump is reduced to ensure stable filling of the insulating oil, thus optimizing the oil supply curve. This ensures both filling quality and high filling efficiency. By detecting the amount of oil inside the opaque plug, errors caused by manual operation are avoided, ensuring the pass rate during large-scale production. At the same time, this application can adjust the filling parameters according to specifications, improving the versatility of the equipment. Through precise flow and pressure control, it can ensure that the insulating oil is evenly filled into all parts inside the plug, improving the electrical performance and reliability of the connector.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included within the protection scope of the present invention.

Claims

1. A wet-plug connector plug oil filling device, characterized in that, Includes an oil tank: used to store insulating oil; Oil supply line (1): One end of the oil supply line (1) is connected to the oil tank, and the other end is equipped with a plug; Exhaust pipe (2): Connected to the inside of the plug, used to exhaust air; Control unit: Used to control the oil filling process; The plug fixing mechanism (3) is used to fix the plug.

2. The wet-plug connector plug oil filling device according to claim 1, characterized in that, The oil supply pipeline (1) is equipped with a flow sensor and a pressure sensor, and transmits detection information to the control unit. The control unit adjusts the speed and amount of oil filling device based on the detection value.

3. The wet-plug connector plug oil filling device according to claim 1, characterized in that, The exhaust pipe (2) is also equipped with a check valve (21) and a vacuum valve, the check valve (21) being configured to prevent hydraulic oil backflow.

4. The wet-plug connector plug oil filling device according to claim 1, characterized in that, The plug fixing mechanism (3) includes a clamp (31) and a positioning pin (32). The plug is provided with a fixing hole. When the clamp (31) is installed in the positioning pin (32), the position of the fixing hole matches the position of the positioning pin (32).

5. The wet-plug connector plug oil filling device according to claim 1, characterized in that, The plug oil filling device is also provided with an oil supply pump at one end and a sealing structure (33) at the other end. The sealing structure (33) includes a plug fixture (331) and an airtight fixture (332) disposed on the plug fixture (331). The sealing structure (33) is used to maintain a seal during the oil filling process.

6. A control method applicable to the oil filling device for a wet-plug connector plug as described in any one of claims 1-5, characterized in that, Includes the following steps: S1. Install the wet plug connector plug to be filled with oil into the clamp of the plug fixing mechanism; S2. Start the vacuum pump and extract the air from inside the oil filling device through the exhaust pipe. Set the working negative pressure value to P0 and simultaneously detect the pressure inside the oil filling device. The detected value is P. S3. If P > P0, it is determined that the current internal pressure has not reached the set value, and the oil filling device continues to be evacuated; otherwise, it is determined that the current internal pressure has reached the preset value, and the process jumps to S4 to continue control. S4. The control unit controls the oil in the oil tank to enter the plug through the oil supply line to fill the oil filling device with oil. S5. Set the flow rate and pressure of the oil in the oil supply line to L0 and Y0 respectively during the oil filling process. During the oil filling process, the flow sensor and pressure sensor detect the flow rate and pressure of the oil, and the detected values ​​are L and Y, and the data are uploaded to the control unit. S6. The control unit detects the data. If L0 < L or Y0 < Y, it is determined that the oil flow rate or velocity in the current oil supply line is too high. The control unit reduces the speed of the oil supply pump. Conversely, if L0 > L or Y0 > Y, it is determined that the oil flow rate or velocity in the current oil supply line is too low. The control unit increases the speed of the oil supply pump. S7. Set the amount of oil to be filled to Z. The control unit detects the amount of oil inside the oil filling device. The detection value is X. If X < 100% Z, it is determined that the oil filling is not complete. The control unit continues to fill the oil filling device. Otherwise, it is determined that the oil filling is complete. The control unit stops the oil supply pump and vacuum pump to complete the oil filling. The quality inspection is performed on the finished oil filling device.

7. The control method for a wet-plug connector plug oil filling device according to claim 6, characterized in that, Step S7 also includes staged oil filling control, including the following steps: S71, setting the speed of the oil supply pump to fast, medium and slow speeds; S72. The oil level inside the oil filling device is detected. The detected value is X0. If X0 < 50%Z, the control center controls the oil supply pump to run at high speed. If 50%Z < X0 < 70%Z, the control center controls the oil pump to run at medium speed. If 70%Z < X0 < 100%Z, the control center controls the oil pump to run at slow speed until X0 = 100%Z.

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