Automatic oil leakage detecting and stopping device for vacuum oil filter

Abstract

The utility model belongs to the technical field of vacuum oil filter equipment, and relates to an automatic oil leakage detection stopping device for a vacuum oil filter, which comprises a lubricating oil station, a liquid level meter arranged on the side wall of the lubricating oil station, a liquid level sensor arranged on the liquid level meter, an oil outlet pipe led out of the bottom of the lubricating oil station, and an oil outlet pump arranged on the oil outlet pipe. An oil return pipe is led out of the top of the lubricating oil station, an oil return pump is arranged on the oil return pipe, the oil return pipe is connected to the vacuum oil filter, and an oil return valve and an oil return pressure sensor are arranged at the two ends of the oil return pipe. The vacuum oil filter, the liquid level sensor, the oil outlet pump, the oil outlet pressure sensor, the oil return pump and the oil return pressure sensor are all electrically connected to the PLC control cabinet. According to the utility model, the sensor is used for detecting and automatically judging whether oil leaks or not, and the oil filter is automatically stopped after oil leakage, so that the processing time from finding oil leakage to stopping the oil filter is shortened, and the oil leakage amount is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of vacuum oil filtration equipment, specifically relating to an automatic oil leakage detection and stop device for a vacuum oil filtration machine. Background Technology

[0002] In thermal power plants, turbine oil systems and transformer oil systems require cleanliness and stability to ensure safe equipment operation. Vacuum oil filters, used for oil system maintenance, remove moisture, gases, and impurities from the oil. However, during operation, vacuum oil filters pose a high risk of oil leakage due to factors such as pipeline seal failure, equipment vibration, or component aging. If leaks are not detected and addressed promptly, they can lead to oil waste and environmental pollution, and may even cause major safety accidents such as fires and equipment damage.

[0003] Currently, thermal power plants commonly use on-site monitoring cameras to visually monitor the operating area of ​​vacuum oil purifiers and detect oil leaks. However, camera footage requires continuous observation by maintenance personnel, which can easily lead to leaks going undetected due to fatigue, distraction, or oversights during shift changes. Furthermore, due to limitations in installation location and viewing angle, cameras cannot fully cover hidden or narrow potential leak points such as the bottom of the vacuum oil purifier, pipe flange connections, and pump seals, creating blind spots. Even if a leak is detected by the camera, manual notification of operators is still required to perform a shutdown. There is a significant time delay between detection and actual equipment shutdown, preventing immediate automatic emergency shutdown and potentially leading to increased leakage and escalating risks.

[0004] Existing technologies are insufficient to meet the safety requirements of thermal power plants for real-time, automatic, and comprehensive monitoring and rapid shutdown of oil leakage risks in vacuum oil filters. There is an urgent need for a device that can automatically determine leakage based on changes in oil system operating parameters and immediately stop the equipment. Therefore, an automatic detection and shutdown device for oil leakage in vacuum oil filters is proposed. Utility Model Content

[0005] The purpose of this invention is to provide an automatic detection and stop device for oil leakage in a vacuum oil filter, which has the functions of real-time, automatic, and full-coverage monitoring of oil leakage risk in the vacuum oil filter and rapid linkage shutdown, thus solving the problems in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides an automatic oil leakage detection and stop device for a vacuum oil filter, including a lubricating oil station. A level gauge is installed on the side wall of the lubricating oil station, and a level sensor is installed on the level gauge. An oil outlet pipe is led out from the bottom of the lubricating oil station, and an oil outlet pump is installed on the oil outlet pipe. The oil outlet pipe is connected to the vacuum oil filter, and an oil outlet valve and an oil outlet pressure sensor are installed at both ends of the oil outlet pipe. An oil return pipe is led out from the top of the lubricating oil station, and an oil return pump is installed on the oil return pipe. The oil return pipe is connected to the vacuum oil filter, and an oil return valve and an oil return pressure sensor are installed at both ends of the oil return pipe. The vacuum oil filter, level sensor, oil outlet pump, oil outlet pressure sensor, oil return pump, and oil return pressure sensor are all electrically connected to a PLC control cabinet.

[0007] Preferably, the level gauge is a magnetic float level gauge, and the level sensor includes an upper limit sensor disposed at the top of the level gauge and a lower limit sensor disposed at the bottom of the level gauge.

[0008] Preferably, a transparent sight glass is also provided on the return oil pipe between the return oil pump and the vacuum oil filter.

[0009] Preferably, a one-way valve is installed on the oil outlet pipe between the oil outlet pump and the vacuum oil filter.

[0010] Preferably, both the oil outlet pipe and the oil return pipe are plastic-coated metal hoses.

[0011] Preferably, the PLC control cabinet is an independently installed sealed dustproof cabinet with a terminal block inside. The control lines of the liquid level sensor, oil outlet pressure sensor, oil return pressure sensor, oil outlet pump, oil return pump, and start / stop signal line of the vacuum oil filter are all connected to the terminal block through shielded cables.

[0012] Preferably, the bottom of the lubricating oil station is also equipped with an emergency drain valve, which is a manual ball valve.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. This utility model uses sensors to automatically detect and determine whether there is an oil leak. If an oil leak occurs, the oil filter will automatically stop, shortening the processing time from the discovery of the oil leak to the shutdown of the oil filter and reducing the amount of oil leakage.

[0015] 2. This utility model provides real-time, automatic, and comprehensive monitoring and rapid shutdown of the risk of oil leakage in vacuum oil filters. It automatically determines leakage based on changes in the operating parameters of the oil system and immediately stops the equipment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an automatic oil leakage detection and stop device for a vacuum oil filter according to one embodiment;

[0018] In the diagram above, 1. Lubricating oil station, 2. Level gauge, 3. Level sensor, 4. Oil outlet pipe, 5. Oil outlet pump, 6. Vacuum oil filter, 7. Oil outlet valve, 8. Oil outlet pressure sensor, 9. Oil return pipe, 10. Oil return pump, 11. Oil return valve, 12. Oil return pressure sensor, 13. PLC control cabinet, 14. Transparent sight glass, 15. Check valve, 16. Emergency drain valve. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Example 1, as Figure 1 As shown, an automatic oil leakage detection and stop device for a vacuum oil filter includes a lubricating oil station 1. The lubricating oil station 1 stores oil and provides an oil source and return buffer container for the vacuum oil filter 6. As the core container of the system, the liquid level change of the lubricating oil station 1 directly reflects the oil leakage situation. A liquid level gauge 2 is installed on the side wall of the lubricating oil station 1, and a liquid level sensor 3 is installed on the liquid level gauge 2. The liquid level gauge 2 visually displays the oil level of the lubricating oil station 1, and the liquid level sensor 3 detects abnormal liquid levels.

[0022] An oil outlet pipe 4 extends from the bottom of the lubricating oil station 1. An oil outlet pump 5 is installed on the oil outlet pipe 4, which is connected to a vacuum oil filter 6. An oil outlet valve 7 and an oil outlet pressure sensor 8 are installed at both ends of the oil outlet pipe 4. A return oil pipe 9 extends from the top of the lubricating oil station 1. A return oil pump 10 is installed on the return oil pipe 9, which is connected to the vacuum oil filter 6. The oil outlet pipe 4 and the return oil pipe 9 form an oil circulation channel. The oil outlet pipe 4 transports the oil from the lubricating oil station 1 to the vacuum oil filter 6. The return oil pipe 9 sends the filtered oil back to the lubricating oil station 1. A return oil valve 11 and a return oil pressure sensor 12 are installed at both ends of the return oil pipe 9. The oil outlet pump 5 and the return oil pump 10 provide the power for oil circulation. The oil outlet pump 5 drives the oil from the lubricating oil station 1 to the vacuum oil filter 6, and the return oil pump 10 drives the filtered oil back to the lubricating oil station 1. Oil outlet valve 7 controls the opening and closing of oil outlet pipe 4. As a primary actuator controlled by PLC, oil outlet valve 7 directly cuts off the oil supply. Oil return valve 11 controls the opening and closing of oil return pipe 9, blocking the oil return path and preventing residual oil from the vacuum oil filter 6 from flowing back to the leak point.

[0023] Oil outlet pressure sensor 8 and oil return pressure sensor 12 monitor pipeline pressure in real time. Oil outlet pressure sensor 8 detects the pressure of oil outlet pipe 4, with a normal value of 0.2 to 0.5 MPa. Oil return pressure sensor 12 detects the pressure of oil return pipe 9, with a normal value of 0.05 to 0.1 MPa. By combining the liquid level signal and pressure change, the accuracy of oil leakage detection is improved, avoiding accidental shutdown. An abnormal increase in oil return pressure may indicate pipeline blockage, providing early warning to prevent equipment damage.

[0024] Vacuum oil filter 6, liquid level sensor 3, oil outlet pump 5, oil outlet pressure sensor 8, return oil pump 10, and return oil pressure sensor 12 are all electrically connected to PLC control cabinet 13. PLC control cabinet 13 is the system control center, receiving sensor signals and controlling the actuators. It integrates signals of excessive liquid level and abnormal pressure, and only executes shutdown when both indicators are triggered simultaneously, reducing the false alarm rate. The entire process from detection to shutdown is automated, solving the problem of delayed manual response.

[0025] The specific design of the aforementioned key components will be discussed in detail below:

[0026] The level gauge 2 is a magnetic float level gauge 2, and the level sensor 3 includes an upper limit sensor located at the top of the level gauge 2 and a lower limit sensor located at the bottom of the level gauge 2. The magnetic float level gauge 2 uses a magnetic float to drive the float to change color, visually indicating the liquid level. The upper limit sensor detects abnormal increases in the liquid level, such as oil return blockage leading to the risk of oil spill, and the lower limit sensor detects abnormal decreases in the liquid level, such as oil leakage or excessive oil output.

[0027] A transparent sight glass 14 is also installed on the return oil pipe 9 between the return oil pump 10 and the vacuum oil filter 6. The transparent sight glass 14 is installed on the return oil pipe 9 to provide a viewing window to observe the oil flow status. Maintenance personnel can intuitively confirm whether the return oil contains air bubbles and whether the flow is continuous, which makes up for the blind trust risk of purely automatic monitoring. If the automatic system alarms, it can be quickly determined whether it is a real oil leak through the sight glass, avoiding false alarms caused by excessive air bubbles.

[0028] A one-way valve 15 is installed on the oil outlet pipe 4 between the oil outlet pump 5 and the vacuum oil filter 6. The one-way valve 15 prevents oil backflow, avoids oil backflow impacting the oil outlet pump 5 when the vacuum oil filter 6 stops, extends pump life, ensures stable pressure sensor data, and improves the reliability of leak detection.

[0029] Both the oil outlet pipe 4 and the oil return pipe 9 are PVC-coated metal hoses. The PVC coating protects the metal mesh from oil corrosion, extending its lifespan. The flexible structure mitigates the risk of pipe loosening caused by equipment vibration and allows it to bend to adapt to narrow spaces.

[0030] The PLC control cabinet 13 is an independently installed, sealed, dustproof cabinet containing a terminal block. The control lines for the liquid level sensor 3, oil outlet pressure sensor 8, oil return pressure sensor 12, oil outlet pump 5, and oil return pump 10, as well as the start / stop signal lines for the vacuum oil filter 6, are all connected to the terminal block via shielded cables. The shielded cables prevent false signals caused by strong electromagnetic interference from the power plant. The standardized wiring of the terminal block facilitates troubleshooting, and the sealed, dustproof design ensures long-term stable operation of the PLC.

[0031] The bottom of the lubrication station 1 is also equipped with an emergency drain valve 16, which is a manual ball valve. The emergency drain valve 16 is used to drain oil in case of emergency. In case of PLC failure or serious leakage, the valve can be manually opened to quickly drain oil and prevent oil from spreading and causing a fire. The manual ball valve does not require electricity and can still be operated under extreme conditions.

[0032] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An automatic oil leakage detection and stop device for a vacuum oil filter, comprising a lubricating oil station, wherein a level gauge is installed on the side wall of the lubricating oil station, characterized in that... The level gauge is equipped with a level sensor. An oil outlet pipe is led out from the bottom of the lubricating oil station, and an oil outlet pump is installed on the oil outlet pipe. The oil outlet pipe is connected to a vacuum oil filter. An oil outlet valve and an oil outlet pressure sensor are installed at both ends of the oil outlet pipe. An oil return pipe is led out from the top of the lubricating oil station, and an oil return pump is installed on the oil return pipe. The oil return pipe is connected to a vacuum oil filter. An oil return valve and an oil return pressure sensor are installed at both ends of the oil return pipe. The vacuum oil filter, level sensor, oil outlet pump, oil outlet pressure sensor, oil return pump, and oil return pressure sensor are all electrically connected to the PLC control cabinet.

2. The automatic oil leakage detection and stop device for a vacuum oil filter according to claim 1, characterized in that, The level gauge is a magnetic float level gauge, and the level sensor includes an upper limit sensor located at the top of the level gauge and a lower limit sensor located at the bottom of the level gauge.

3. The automatic oil leakage detection and stop device for a vacuum oil filter according to claim 1, characterized in that, A transparent sight glass is also installed on the return oil pipe between the return oil pump and the vacuum oil filter.

4. The automatic oil leakage detection and stop device for a vacuum oil filter according to claim 1, characterized in that, A one-way valve is installed on the oil outlet pipe between the oil pump and the vacuum oil filter.

5. The automatic oil leakage detection and stop device for a vacuum oil filter according to claim 1, characterized in that, Both the oil outlet pipe and the oil return pipe are plastic-coated metal flexible hoses.

6. The automatic oil leakage detection and stop device for a vacuum oil filter according to claim 1, characterized in that, The PLC control cabinet is an independently installed sealed dustproof cabinet with a terminal block inside. The control lines of the liquid level sensor, oil outlet pressure sensor, oil return pressure sensor, oil outlet pump, oil return pump, and start / stop signal line of the vacuum oil filter are all connected to the terminal block through shielded cables.

7. The automatic oil leakage detection and stop device for a vacuum oil filter according to claim 1, characterized in that, The bottom of the lubrication station is also equipped with an emergency drain valve, which is a manual ball valve.

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