Oil-immersed transformer oil tank pressure monitoring device

Abstract

The invention belongs to the technical field of pressure monitoring devices, and discloses an oil-immersed transformer oil tank pressure monitoring device which comprises a liquid inlet piece, a detection piece and a liquid outlet piece which are arranged outside an oil-immersed transformer, the detection piece comprises a detection unit, a space for containing transformer oil is formed in the detection unit, a pressure sensor is fixedly connected in the space, and the liquid outlet piece is connected with the pressure sensor. A first conveying channel for conveying transformer oil along a first preset path is formed in the liquid inlet part, the liquid inlet end of the first conveying channel is fixedly connected with the bottom of the oil-immersed transformer, and the transformer oil in the transformer is led out through the liquid inlet part, so that the transformer oil is conveyed into the detection unit to detect the pressure; transformer oil is conveyed back into the transformer through the liquid outlet piece, the device can monitor the pressure of the transformer externally, when the device is damaged, maintenance can be conducted only by disassembling the device outside the device, and maintenance personnel do not need to disassemble an oil tank of the transformer integrally to conduct overhaul and maintenance.

Description

Technical Field

[0001] This invention belongs to the technical field of pressure monitoring devices, specifically relating to a pressure monitoring device for an oil-immersed transformer tank. Background Technology

[0002] Oil-immersed transformers are core equipment in power systems for voltage transformation. Their core structure includes the core, windings, and tank system. Monitoring the internal pressure of the tank is crucial for ensuring the safe operation of the transformer. The main reasons for this include: excessive pressure can lead to weld cracking and oil leakage, potentially causing an explosion in extreme cases; insufficient pressure can cause the oil level to drop below the breather, allowing air or moisture intrusion, which reduces insulation performance and accelerates oil oxidation. The safe operation of oil-immersed transformers is highly dependent on the stability of the internal tank pressure. Pressure monitoring can prevent accidents such as leaks and explosions, and also provides data support for insulation condition assessment and intelligent operation and maintenance. Therefore, pressure monitoring of oil-immersed transformers is necessary. However, current pressure monitoring systems are installed inside the transformer. While this allows for pressure monitoring, in the event of a fault, maintenance personnel must completely disassemble the transformer tank before repairs can be performed, resulting in high maintenance difficulty and low efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide an oil-immersed transformer tank pressure monitoring device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an oil-immersed transformer tank pressure monitoring device, comprising an inlet component, a detection component, and an outlet component disposed outside the oil-immersed transformer. The detection component includes a detection unit, the detection unit having a space for containing transformer oil inside, a pressure sensor being fixedly connected inside the space. The inlet component has a first conveying channel for conveying transformer oil along a first preset path, and the inlet end of the first conveying channel is fixedly connected to the bottom of the oil-immersed transformer. The outlet component has a second conveying channel for conveying transformer oil along a second preset path, and the outlet end of the second conveying channel is fixedly connected to the bottom of the oil-immersed transformer. The detection unit is installed between the outlet end of the first conveying channel and the inlet end of the second conveying channel.

[0005] Preferably, the testing component further includes a support unit, which is fixedly connected to the bottom of the oil-immersed transformer. The bottom of the support unit is recessed to form multiple slots, and a detachable card plate is slidably connected inside the slot. The bottom of the card plate is fixedly connected to the top of the testing unit, and the card plate matches the testing unit one by one.

[0006] Preferably, the support unit has two mounting plates symmetrically fixedly connected to its bottom, and multiple detection units are located between the two mounting plates. The mounting plates are recessed to form a through-type flow guide groove, and a flow guide fan is installed inside the flow guide groove.

[0007] Preferably, a heat-conducting plate is fixedly connected to the bottom of the detection unit, and multiple flow guide holes are formed in the heat-conducting plate.

[0008] Preferably, the detection unit includes a detection shell, with liquid guide heads fixedly connected to both ends of the detection shell. The space is formed inside the detection shell, and both liquid guide heads communicate with the space. The liquid guide heads are provided with detachable plugs.

[0009] Preferably, the support unit includes a support plate, with side plates fixedly connected to both sides of the support plate symmetrically, and screws screwed onto the side plates, and the slot is formed at the bottom of the support plate.

[0010] Preferably, the liquid inlet component includes a processing shell, the top of which is fixedly connected to a first liquid guiding hose and a second liquid guiding hose communicating with its interior. The free end of the first liquid guiding hose is fixedly connected to the bottom of the oil-immersed transformer, and the free end of the second liquid guiding hose is rotatably connected to a first connector. The liquid outlet component includes a circulation pump, the inlet and outlet ends of which are respectively fixedly connected to a third liquid guiding hose and a fourth liquid guiding hose. The free end of the fourth liquid guiding hose is fixedly connected to a connecting pipe, the free end of which is fixedly connected to the bottom of the oil-immersed transformer. The free end of the third liquid guiding hose is rotatably connected to a second connector. Both the first and second connectors are matched with the liquid guiding head. The two sides of the support plate are symmetrically recessed to form two sliding grooves, which are located between the two side plates. Sliding plates are slidably connected inside the two sliding grooves, and the second and third liquid guiding hoses pass through the sliding plates.

[0011] Preferably, the bottom of the processing shell is open to form a cavity, and a detachable sealing cap is screwed onto the bottom of the processing shell. A filter cover is fixedly connected to the top of the sealing cap. Multiple filter holes are formed on the circumferential surface of the filter cover, and the top of the filter cover is open. The second liquid guiding hose is located inside the filter cover, and the first liquid guiding hose is located outside the filter cover.

[0012] Preferably, an electric push rod is fixedly connected to the bottom of the sealing cover, and a movable cleaning ring is fitted on the filter cover. A connecting rod is fixedly connected to the bottom of the cleaning ring. The bottom of the connecting rod slides through the sealing cover, and a connecting plate is fixedly connected between the bottom of the connecting rod and the telescopic end of the electric push rod.

[0013] Preferably, the monitoring device further includes a liquid storage component, which includes a liquid storage tank. The liquid storage tank forms an oil storage cavity for storing transformer oil, and a liquid filling pipe connected to the oil storage cavity is fixedly connected to the top of the liquid storage tank. A detachable sealing head is screwed onto the top of the liquid filling pipe. A replenishing pump is fixedly connected to one side of the liquid storage tank. An inlet pipe and an outlet pipe are fixedly connected to the inlet end and outlet end of the replenishing pump, respectively. The inlet end of the inlet pipe is fixedly connected to the liquid storage tank, and the free end of the outlet pipe is fixedly connected to a connecting pipe.

[0014] Compared with the prior art, the beneficial effects of the present invention are: (1) The present invention sets up an inlet, a detection and an outlet on the outside of the transformer. The transformer oil inside the transformer is led out through the inlet and delivered to the detection unit to detect the pressure. The transformer oil is delivered back to the transformer through the outlet. The device can monitor the pressure of the transformer from the outside. When the device is damaged, it can be maintained by simply disassembling the device from the outside. There is no need for maintenance personnel to completely disassemble the transformer oil tank for inspection and maintenance, which reduces the difficulty of later maintenance and improves the efficiency of later maintenance.

[0015] (2) By setting up a support plate, a clamping plate, and a detection shell, after the support plate is fixed to the bottom of the transformer, the detection shell is engaged with the clamping plate and the groove at the bottom of the support plate, so that multiple detection shells can be installed under the support plate. When one of the detection shells and the corresponding pressure sensor is damaged, it is only necessary to separate the liquid inlet and liquid outlet and connect the liquid inlet and liquid outlet to the liquid guide head on other detection shells, so that the device can work immediately, shorten the maintenance time during inspection and maintenance, and further improve the maintenance efficiency of the device.

[0016] (3) When personnel need to replace the detection shell and the corresponding pressure sensor, they only need to pull the detection shell to separate the detection shell from the card slot, so that the detection shell can be separated from the support plate, and the damaged detection shell and pressure sensor can be removed. Personnel can then use the card slot to engage the intact detection shell and pressure sensor to complete the replacement of the detection shell and pressure sensor, further shortening the maintenance time and improving the maintenance efficiency of the device.

[0017] (4) During the flow of transformer oil, the transformer oil is delivered to the detection housing through the second liquid guiding hose, and the airflow is blown to the heat-conducting plate below the detection housing by the working of the guide fan on the mounting plate, thereby accelerating the heat dissipation efficiency of the transformer oil, thereby reducing the temperature of the transformer during operation and extending the service life of the transformer.

[0018] (5) When the transformer is transported through the first liquid guide pipe and the second liquid guide pipe, when the transformer oil flows into the processing shell, it is filtered through the filter cover, so that the impurities in the transformer oil are retained outside the filter cover. The filtered transformer oil flows into the filter cover and is discharged through the second liquid guide pipe, which reduces the interference of impurities during the operation of the transformer and extends the service life of the transformer oil and the transformer.

[0019] (6) The present invention sets up a movable cleaning ring, and drives the connecting plate to move by an electric push rod, so that the connecting plate drives the connecting rod to move, and the connecting rod drives the cleaning ring to move. The cleaning ring scrapes the filter cover, thereby cleaning the impurities attached to the filter cover, avoiding impurities from clogging the filter cover, so that the filter cover can continuously filter transformer oil, improve the filtration efficiency of transformer oil, and further extend the working efficiency of the device.

[0020] (7) By setting a detachable sealing cover, the present invention can be detachably connected to the processing shell. When the processing shell is full of impurities, the personnel only need to separate the sealing cover from the processing shell to expose the filter cover and discharge the impurities inside the processing shell. This makes it easier to clean the impurities inside the processing shell, further reducing the maintenance difficulty of the device and improving the maintenance efficiency of the device. Attached Figure Description

[0021] Figure 1 This is one of the perspective views of the present invention; Figure 2 This is a second perspective view of the present invention; Figure 3 This is a perspective view of the invention in use; Figure 4 This is one of the perspective views of the liquid inlet component of the present invention; Figure 5 This is a second perspective view of the liquid inlet component of the present invention; Figure 6 This is a perspective view of the filter housing of the present invention; Figure 7 One of the perspective views of the detection element of the present invention; Figure 8 This is a second perspective view of the testing component of the present invention; Figure 9 This is a cross-sectional view of the detection shell of the present invention; Figure 10 This is a perspective view of the liquid outlet component of the present invention; Figure 11 This is a perspective view of the liquid storage component of the present invention; In the diagram: 1. Liquid inlet; 11. Processing housing; 12. First liquid guiding hose; 13. Second liquid guiding hose; 14. First connector; 15. Sealing cap; 16. Connecting rod; 17. Electric push rod; 18. Connecting plate; 19. Filter cover; 110. Cleaning ring; 2. Detection element; 21. Support plate; 22. Side plate; 23. Screw; 24. Slide groove; 25. Slot; 26. Slide plate; 27. Detection unit; 271. Detection housing; 272. Liquid guiding head; 2 73. Plug; 274. Pressure sensor; 28. Clamping plate; 29. ​​Mounting plate; 210. Flow guide groove; 211. Flow guide fan; 212. Heat conduction plate; 213. Flow guide hole; 3. Liquid outlet; 31. Circulation pump; 32. Third liquid guide hose; 33. Second connector; 34. Fourth liquid guide hose; 35. Connecting pipe; 4. Liquid storage component; 41. Liquid storage tank; 42. Liquid replenishment pump; 43. Liquid inlet pipe; 44. Liquid outlet pipe; 45. Liquid filling pipe; 46. Sealing head. Detailed Implementation

[0022] 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, and 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.

[0023] Please see Figures 1-11 As shown, the present invention provides the following technical solution: An oil-immersed transformer tank pressure monitoring device includes a detection element 2 for monitoring the tank pressure of the transformer. However, if the detection element 2 is directly placed inside the transformer, it would be inconvenient to repair it if it fails. Therefore, the detection element 2 is placed outside the transformer. In order to draw out the oil inside the transformer and transport the transformer oil back to the inside of the transformer so that the transformer oil can circulate, the device also includes an inlet element 1 and an outlet element 3, which are also located outside the transformer. Furthermore, in this invention, regarding the aforementioned detection element 2, as... Figures 1-3 , Figures 7-9 As shown, the detection component 2 includes a detection unit 27, which forms a space to contain transformer oil. A pressure sensor 274 is fixedly connected inside the space. Furthermore, in this invention, regarding how the aforementioned liquid inlet 1 extracts transformer oil and delivers it to the detection unit 27, a first conveying channel for conveying transformer oil along a first preset path is formed on the liquid inlet 1, and the inlet end of the first conveying channel is fixedly connected to the bottom of the oil-immersed transformer. In addition, regarding how the aforementioned liquid outlet 3 delivers transformer oil to the inside of the transformer, a second conveying channel for conveying transformer oil along a second preset path is formed on the liquid outlet 3, and the outlet end of the second conveying channel is fixedly connected to the bottom of the oil-immersed transformer. The detection unit 27 is installed between the outlet end of the first conveying channel and the inlet end of the second conveying channel.

[0024] In this embodiment, before the device is put into use, the inlet component 1 is fixedly connected to the bottom of the transformer, and the outlet component 3 is also fixedly connected to the bottom of the transformer. The inlet end of the first conveying channel of the inlet component 1 is connected to the inside of the transformer, and the outlet end of the second conveying channel of the outlet component 3 is connected to the inside of the transformer. When the inlet component 1 is working, the transformer oil inside the transformer is guided to flow along the first conveying channel, so that the transformer oil flows into the space inside the detection unit 27. The oil pressure is monitored by the pressure sensor 274, and then the oil tank pressure is monitored. When the outlet component 3 is working, the transformer oil in the detection unit 27 flows along the second conveying channel, so that the transformer oil is transported back to the inside of the transformer, thereby allowing the transformer oil to circulate. When the detection unit 27 malfunctions, the maintenance personnel only need to repair the detection unit 27 from the outside of the transformer, reducing the difficulty of later maintenance of the transformer.

[0025] When the detection unit 27 is damaged, in order to facilitate the repair and replacement of the detection unit 27, such as Figures 1-3 , Figures 7-8 As shown, the detection component 2 also includes a support unit, which is fixedly connected to the bottom of the oil-immersed transformer. The bottom of the support unit is recessed to form multiple slots 25. A detachable card plate 28 is slidably connected inside the slot 25. The bottom of the card plate 28 is fixedly connected to the top of the detection unit 27, and the card plate 28 matches the detection unit 27 one by one.

[0026] In this embodiment, before the device is put into use, the support unit is fixed to the bottom of the transformer. After the support unit is fixed, the detection unit 27 is engaged with the slot 25 at the bottom of the support unit through the clamping plate 28, so that the detection unit 27 is fixed below the support unit. When personnel need to disassemble the detection unit 27 for maintenance or replacement, the clamping plate 28 is engaged with the slot 25 at the bottom of the support unit, so that multiple detection units 27 are fixed below the slot 25. After the detection unit 27 is installed, transformer oil can be transported through the liquid inlet 1 and the liquid outlet 3, so that the transformer oil circulates.

[0027] When a transformer is working, it inevitably generates a lot of heat. To help the transformer dissipate heat, such as... Figures 1-3 , Figures 7-8 As shown, two mounting plates 29 are symmetrically fixedly connected to the bottom of the support unit, and multiple detection units 27 are located between the two mounting plates 29. The mounting plates 29 are recessed to form a through-type flow guide groove 210, and a flow guide fan 211 is installed inside the flow guide groove 210.

[0028] In this embodiment, when the transformer is working, the airflow is guided by the flow guide fan 211, and the airflow passing through the mounting plate 29 is guided by the flow guide groove 210, so that the airflow blows towards the detection unit 27, thereby assisting the detection unit 27 in heat dissipation, reducing the temperature of the transformer oil inside the detection unit 27, and allowing the transformer oil to reduce its temperature during circulation, thereby reducing the operating temperature of the transformer and extending the service life of the transformer.

[0029] When the airflow guided by the fan 211 blows air toward the detection unit 27, the heat-conducting plate 212 and the airflow guide hole 213 work together to allow the temperature of the transformer oil inside the detection unit 27 to drop more quickly. Figures 1-3 , Figures 7-8 As shown, a heat-conducting plate 212 is fixedly connected to the bottom of the detection unit 27, and multiple flow guide holes 213 are formed in the heat-conducting plate 212.

[0030] In this embodiment, when the transformer oil passes through the detection unit 27, the detection unit 27 absorbs the heat of the transformer oil and conducts the heat to the heat conduction plate 212. The airflow is guided by the operation of the guide fan 211, and the airflow passing through the mounting plate 29 is guided by the guide groove 210, so that the airflow blows towards the detection unit 27 and the heat conduction plate 212. The airflow is assisted by the guide holes 213 on the heat conduction plate 212 to dissipate heat, thereby reducing the temperature of the transformer oil inside the detection unit 27.

[0031] Specifically, in one embodiment, regarding the detection unit 27 described above, as follows: Figures 1-3 , Figures 7-9 As shown, the detection unit 27 includes a detection shell 271, with liquid guide heads 272 fixedly connected to both ends of the detection shell 271. A space is formed inside the detection shell 271, and both liquid guide heads 272 are in communication with the space. A detachable plug 273 is provided on the liquid guide head 272.

[0032] In this embodiment, before the device is put into use, the support unit is fixed to the bottom of the transformer. After the support unit is fixed, the detection shell 271 is engaged with the slot 25 at the bottom of the support unit via the clamping plate 28, thereby fixing the detection shell 271 below the support unit. Then, the plug 273 is separated from the liquid guide head 272 on the detection shell 271. The liquid outlet end of the liquid inlet 1 and the liquid inlet end of the liquid outlet 3 are connected to the liquid guide heads 272 at both ends of the detection shell 271, respectively. The liquid inlet 1 guides the flow of hydraulic oil inside the transformer tank, so that the transformer oil is delivered to the detection shell 271 through the liquid guide head 272. The pressure can then be detected by the pressure sensor 274 in the detection shell 271, and the hydraulic oil in the detection shell 271 is delivered through the liquid outlet 3. If the current detection housing 271 or the pressure sensor 274 inside the detection housing 271 is damaged, personnel only need to separate the liquid outlet end of the liquid inlet 1 and the liquid inlet end of the liquid outlet 3 from the liquid guide head 272 on the current detection housing 271, and then connect the liquid outlet end of the liquid inlet 1 and the liquid inlet end of the liquid outlet 3 to the liquid guide head 272 on other detection housings 271. The device can continue to work without the need for long-term shutdown for maintenance. Moreover, the normal operation of the device will not be affected during maintenance. When personnel need to disassemble the detection housing 271, they only need to push the detection housing 271 to make the detection housing 271 drive the clamping plate 28 to slide, so that the clamping plate 28 separates from the clamping groove 25 at the bottom of the support unit, and the detection housing 271 can be removed for separation.

[0033] Specifically, in one embodiment, regarding the aforementioned support unit, such as Figures 1-3 , Figures 6-8 As shown, the support unit includes a support plate 21, and side plates 22 are fixedly connected to both sides of the support plate 21 symmetrically. Screws 23 are screwed onto the side plates 22, and slots 25 are formed at the bottom of the support plate 21.

[0034] In this embodiment, before the personnel install the detection shell 271, the support plate 21 is placed at the bottom of the transformer where it needs to be fixed. Then, the screw 23 on the side plate 22 is rotated so that the screw 23 passes through the side plate 22 and is screwed into the transformer. The screw 23 abuts against the side plate 22, thereby fixing the side plate 22 and fixing the support plate 21 to the transformer. The detection shell 271 is installed at the bottom of the support plate 21 by engaging with the card plate 28 through the slot 25 at the bottom of the support plate 21. When the detection shell 271 needs to be removed, the detection shell 271 is pulled so that the card plate 28 slides relative to the slot 25 until the card plate 28 separates from the slot 25. Then the card plate 28 and the detection shell 271 can be removed for replacement.

[0035] Specifically, in one embodiment, regarding the aforementioned liquid inlet 1, as... Figures 1-6As shown, the liquid inlet component 1 includes a processing shell 11. A first liquid guiding hose 12 and a second liquid guiding hose 13, communicating with the interior of the processing shell 11, are fixedly connected to the top of the shell. A valve is installed on the first liquid guiding hose 12, and a valve is installed on the connecting pipe 35. The free end of the first liquid guiding hose 12 is fixedly connected to the bottom of the oil-immersed transformer. A first connector 14 is rotatably connected to the free end of the second liquid guiding hose 13. The liquid outlet component 3 includes a circulation pump 31. A third liquid guiding hose 32 and a fourth liquid guiding hose 34 are fixedly connected to the inlet and outlet ends of the circulation pump 31, respectively. The free end of the fourth liquid guiding hose 34 is fixedly connected to a connecting pipe 35, and the free end of the connecting pipe 35 is fixedly connected to the bottom of the oil-immersed transformer. The free end of the third liquid guiding hose 32 is rotatably connected to a second connector 33. The first connector 14 and the second connector 33 are both matched with the liquid guiding head 272. The two sides of the support plate 21 are symmetrically recessed to form two sliding grooves 24. The two sliding grooves 24 are located between the two side plates 22, and the sliding plate 26 is slidably connected inside the two sliding grooves 24. The second liquid guiding hose 13 and the third liquid guiding hose 32 both pass through the sliding plate 26.

[0036] In this embodiment, after the support plate 21 is fixed, the sliding plate 26 is pulled, causing it to slide in the groove 24 on the support plate 21. As the sliding plate 26 slides, it simultaneously moves the second connector 33 and the first connector 14 to the side where the detection housing 271 needs to be connected. Then, the plug 273 on the detection housing 271 is removed, and the second connector 33 and the first connector 14 are screwed onto the liquid guide heads 272 at both ends of the detection housing 271. The transformer oil inside the transformer is guided to flow through the first liquid guide hose 12, flowing into the processing housing 11. The hydraulic oil in the processing housing 11 flows into the second liquid guide hose 13, which then delivers the hydraulic oil to the detection housing 271. The pressure is detected by the pressure sensor 274 in the detection housing 271, and the circulation pump 31 operates, thereby allowing the third liquid guide hose 32 to... Transformer oil is extracted and fed into the detection housing 271 through the second connector 33, and finally discharged through the fourth fluid guide hose 34. The transformer oil is then transported back to the transformer oil tank through the connecting pipe 35, thus allowing the transformer oil to circulate. When personnel need to replace the detection housing 271 and pressure sensor 274 for monitoring, the second connector 33 and the first connector 14 are separated from the fluid guide head 272 on the current detection housing 271. The sliding plate 26 is pulled, causing it to slide in the groove 24 on the support plate 21. As the sliding plate 26 slides, it simultaneously moves the second connector 33 and the first connector 14 to the side of the detection housing 271 that needs to be connected. The second connector 33 and the first connector 14 are then connected to the fluid guide head 272 on the detection housing 271, thus completing the replacement of the detection housing 271.

[0037] In addition, as impurities in the transformer oil gradually increase during transformer operation, in order to prevent these impurities from affecting the normal operation of the transformer, such as... Figures 1-6 As shown, the bottom of the processing shell 11 is open to form a cavity, and a detachable sealing cover 15 is screwed onto the bottom of the processing shell 11. A filter cover 19 is fixedly connected to the top of the sealing cover 15. Multiple filter holes are formed on the circumferential surface of the filter cover 19, and the top of the filter cover 19 is open. The second liquid guiding hose 13 is inside the filter cover 19, and the first liquid guiding hose 12 is outside the filter cover 19.

[0038] In this embodiment, the transformer oil inside the transformer is guided to flow through the first fluid guiding hose 12, flowing into the processing shell 11. The hydraulic oil in the processing shell 11 flows into the second fluid guiding hose 13, which then delivers the hydraulic oil to the detection shell 271. During this process, when the transformer oil enters the processing shell 11, it is filtered by the filter cover 19, causing impurities in the transformer oil to be retained on the outside of the filter cover 19. The filtered transformer oil then enters the interior of the filter cover 19 and flows through the second fluid guiding hose 13, guiding the filtered transformer oil... Transformer oil is fed into the detection housing 271 and continuously filtered through the transformer oil circulation. When personnel need to clean impurities inside the treatment housing 11, the valves on the first fluid guiding hose 12 and the connecting pipe 35 are closed. Simply rotate the sealing cover 15 to separate it from the treatment housing 11, pull the sealing cover 15 to separate it from the treatment housing 11, and expose the filter cover 19 to discharge impurities inside the treatment housing 11. After the impurities are cleaned, the sealing cover 15 can be screwed back onto the treatment housing 11 to install the filter cover 19 inside the treatment housing 11, and the transformer oil can continue to be filtered.

[0039] To improve the filtration efficiency of the filter cover 19 and prevent it from being clogged by impurities during filtration, as shown in the figure, an electric push rod 17 is fixedly connected to the bottom of the sealing cover 15, and a movable cleaning ring 110 is fitted on the filter cover 19. A connecting rod 16 is fixedly connected to the bottom of the cleaning ring 110. The bottom of the connecting rod 16 slides through the sealing cover 15, and a connecting plate 18 is fixedly connected between the bottom of the connecting rod 16 and the telescopic end of the electric push rod 17.

[0040] In this embodiment, when the filter cover 19 filters the transformer oil, the electric push rod 17 is supported by the sealing cover 15. The electric push rod 17 drives the connecting plate 18 to move, and the connecting plate 18 drives the connecting rod 16 to move. The connecting rod 16 drives the cleaning ring 110 to move back and forth, so that the cleaning ring 110 scrapes the filter cover 19, thereby preventing impurities from adhering to the filter cover 19. This allows the filter cover 19 to continuously filter the transformer oil and improve the circulation efficiency of the transformer oil.

[0041] To facilitate transformer oil changes, such as Figures 1-3 , Figures 10-11 As shown, the monitoring device also includes a liquid storage component 4, which includes a liquid storage tank 41. The liquid storage tank 41 forms an oil storage chamber for storing transformer oil. A liquid filling pipe 45 communicating with the oil storage chamber is fixedly connected to the top of the liquid storage tank 41. A detachable sealing head 46 is screwed onto the top of the liquid filling pipe 45. A replenishing pump 42 is fixedly connected to one side of the liquid storage tank 41. An inlet pipe 43 and an outlet pipe 44 are fixedly connected to the inlet end and outlet end of the replenishing pump 42, respectively. The inlet end of the inlet pipe 43 is fixedly connected to the liquid storage tank 41, and the free end of the outlet pipe 44 is fixedly connected to the connecting pipe 35.

[0042] In this embodiment, before the device is put into use, the sealing head 46 is rotated to separate the sealing head 46 from the liquid filling pipe 45. Transformer oil is added to the storage tank 41 through the liquid filling pipe 45. Then, the sealing head 46 and the liquid filling pipe 45 are screwed together. After the transformer oil is added, if personnel need to replenish the transformer oil to the transformer oil tank, the replenishment pump 42 is operated, so that the liquid inlet pipe 43 draws the transformer oil inside the storage tank 41, and the transformer oil is transported through the liquid outlet pipe 44 to the connecting pipe 35, thereby replenishing the transformer oil to the transformer oil tank and completing the transformer oil replenishment.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure monitoring device for an oil-immersed transformer tank, characterized in that: The device includes an inlet (1), a detection component (2), and an outlet (3) located outside the oil-immersed transformer. The detection component (2) includes a detection unit (27), which forms a space for containing transformer oil. A pressure sensor (274) is fixedly connected inside the space. The inlet (1) forms a first conveying channel for conveying transformer oil along a first preset path, and the inlet end of the first conveying channel is fixedly connected to the bottom of the oil-immersed transformer. The outlet (3) forms a second conveying channel for conveying transformer oil along a second preset path, and the outlet end of the second conveying channel is fixedly connected to the bottom of the oil-immersed transformer. The detection unit (27) is installed between the outlet end of the first conveying channel and the inlet end of the second conveying channel.

2. The oil-immersed transformer tank pressure monitoring device according to claim 1, characterized in that: The detection component (2) also includes a support unit, which is fixedly connected to the bottom of the oil-immersed transformer. The bottom of the support unit is recessed to form multiple slots (25). A detachable card plate (28) is slidably connected inside the slot (25). The bottom of the card plate (28) is fixedly connected to the top of the detection unit (27), and the card plate (28) matches the detection unit (27) one by one.

3. The oil-immersed transformer tank pressure monitoring device according to claim 2, characterized in that: The support unit has two mounting plates (29) symmetrically fixedly connected at the bottom. Multiple detection units (27) are located between the two mounting plates (29). The mounting plates (29) are recessed to form a through-type guide groove (210). A guide fan (211) is installed inside the guide groove (210).

4. The oil-immersed transformer tank pressure monitoring device according to claim 3, characterized in that: The bottom of the detection unit (27) is fixedly connected to a heat-conducting plate (212), and multiple flow guide holes (213) are formed in the heat-conducting plate (212).

5. A pressure monitoring device for an oil-immersed transformer tank according to any one of claims 1-4, characterized in that: The detection unit (27) includes a detection shell (271), and liquid guide heads (272) are fixedly connected to both ends of the detection shell (271). The space is formed inside the detection shell (271), and both liquid guide heads (272) are in communication with the space. A detachable plug (273) is provided on the liquid guide head (272).

6. A pressure monitoring device for an oil-immersed transformer tank according to any one of claims 2-4, characterized in that: The support unit includes a support plate (21), and side plates (22) are fixedly connected to both sides of the support plate (21). A screw (23) is screwed onto the side plate (22), and a slot (25) is formed at the bottom of the support plate (21).

7. The oil tank pressure monitoring device for an oil-immersed transformer according to claim 6, characterized in that: The inlet component (1) includes a processing shell (11). The top of the processing shell (11) is fixedly connected to a first liquid guiding hose (12) and a second liquid guiding hose (13) that communicate with its interior. The free end of the first liquid guiding hose (12) is fixedly connected to the bottom of the oil-immersed transformer. The free end of the second liquid guiding hose (13) is rotatably connected to a first connector (14). The outlet component (3) includes a circulation pump (31). The inlet and outlet ends of the circulation pump (31) are respectively fixedly connected to a third liquid guiding hose (32) and a fourth liquid guiding hose (34). The free end of the fourth liquid guiding hose (34) is fixedly connected to... There is a connecting pipe (35), the free end of which is fixedly connected to the bottom of the oil-immersed transformer. The free end of the third liquid guiding hose (32) is rotatably connected to a second connector (33). The first connector (14) and the second connector (33) are both matched with the liquid guiding head (272). The two sides of the support plate (21) are also recessed to form two sliding grooves (24). The two sliding grooves (24) are located between the two side plates (22), and the sliding plate (26) is slidably connected inside the two sliding grooves (24). The second liquid guiding hose (13) and the third liquid guiding hose (32) both pass through the sliding plate (26).

8. The oil-immersed transformer tank pressure monitoring device according to claim 7, characterized in that: The bottom of the processing shell (11) is open to form a cavity, and a detachable sealing cap (15) is screwed onto the bottom of the processing shell (11). A filter cover (19) is fixedly connected to the top of the sealing cap (15). Multiple filter holes are formed on the circumferential surface of the filter cover (19), and the top of the filter cover (19) is open. The second liquid guiding hose (13) is inside the filter cover (19), and the first liquid guiding hose (12) is outside the filter cover (19).

9. The oil-immersed transformer tank pressure monitoring device according to claim 8, characterized in that: The bottom of the sealing cover (15) is fixedly connected to an electric push rod (17), and a movable cleaning ring (110) is fitted on the filter cover (19). The bottom of the cleaning ring (110) is fixedly connected to a connecting rod (16), the bottom of the connecting rod (16) slides through the sealing cover (15), and a connecting plate (18) is fixedly connected between the bottom of the connecting rod (16) and the telescopic end of the electric push rod (17).

10. The oil-immersed transformer tank pressure monitoring device according to claim 7, characterized in that: It also includes a liquid storage component (4), which includes a liquid storage tank (41). The liquid storage tank (41) forms an oil storage chamber for storing transformer oil. A liquid filling pipe (45) is fixedly connected to the top of the liquid storage tank (41) and communicates with the oil storage chamber. A detachable sealing head (46) is screwed onto the top of the liquid filling pipe (45). A replenishing pump (42) is fixedly connected to one side of the liquid storage tank (41). An inlet pipe (43) and an outlet pipe (44) are fixedly connected to the inlet end and outlet end of the replenishing pump (42), respectively. The inlet end of the inlet pipe (43) is fixedly connected to the liquid storage tank (41), and the free end of the outlet pipe (44) is fixedly connected to the connecting pipe (35).

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