Filtered oil replacement device for steam turbine overhaul

Abstract

The utility model discloses an oil filtering and replacing device for steam turbine overhaul. A first oil replacing barrel and a second oil replacing barrel are arranged at intervals in the length direction of the top of a steam turbine. The two cover plates are detachably connected to the top of the first oil changing barrel and the top of the second oil changing barrel correspondingly. The two fixing tables are symmetrically arranged on the top of the steam turbine, and oil well pumps are installed on the tops of the fixing tables. The input ends of the two oil well pumps are connected to oil way connectors on the two sides of a steam turbine through corresponding oil conveying pipes, and the output ends of the two oil well pumps are connected to the first oil changing barrel and the second oil changing barrel correspondingly. The switching mechanism is arranged between the first oil changing barrel and the second oil changing barrel; the two filtering mechanisms are arranged in the first oil changing barrel and the second oil changing barrel correspondingly and located below the output end of the oil well pump. Therefore, the device does not need to be in direct pipeline butt joint with a gasoline engine oil system to complete circulating filtration operation, the tedious pipeline connection and disassembly process is successfully avoided, the operation steps are greatly simplified, and the dependence on professional skills of operators is reduced.

Description

Technical Field

[0001] This application relates to the field of steam engine oil filter replacement technology, and in particular to an oil filter replacement device for steam engine maintenance. Background Technology

[0002] In the power generation sector, steam turbines (usually referring to steam engines) are the core equipment of power plants, undertaking the crucial task of converting thermal energy into mechanical energy to drive generators and produce electricity. Their operational status directly affects the power plant's power generation efficiency and safety. The steam turbine's lubrication system plays a key role in ensuring the normal operation of all components, providing lubrication, cooling, and cleaning for moving parts, reducing mechanical wear, and extending equipment lifespan. However, during long-term operation, the lubrication system faces numerous challenges. Friction between mechanical parts generates a large number of metal wear particles; simultaneously, changes in humidity in the operating environment and inadequate system sealing can lead to moisture entering the lubrication oil; furthermore, lubrication oil undergoes oxidation at high temperatures, generating oxidation products. The presence of these impurities severely degrades the quality of the lubrication oil, reduces its lubrication performance, and increases the risk of equipment failure, such as accelerated component wear, jamming, or even damage, seriously affecting the stable operation of the steam turbine. To ensure the normal operation of the lubrication system and guarantee the safe and reliable operation of the steam turbine, regular filtration and replacement of the lubrication oil are necessary.

[0003] Most existing oil filter replacement devices have complex operating procedures, typically requiring direct pipeline connection to the engine oil system for circulating filtration. This method not only consumes significant time and manpower for connecting and disassembling pipelines but also demands a high level of skill from the operators. During pipeline connection, it is crucial to ensure the sealing and accuracy of the connection; improper connections can lead to lubricating oil leaks, resulting in resource waste, potential environmental pollution, and even safety accidents. Utility Model Content

[0004] This application provides an oil filter replacement device for steam turbine maintenance, which solves the problems mentioned in the background art.

[0005] This application provides an oil filter replacement device for steam turbine maintenance.

[0006] The first and second oil change drums are spaced apart along the length of the top of the turbine.

[0007] Two covers are detachably connected to the top of the first oil change tank and the second oil change tank, respectively;

[0008] Two fixed platforms are symmetrically arranged on the top of the steam turbine, and each platform is equipped with an oil pump. The input ends of the two oil pumps are connected to the oil circuit interfaces on both sides of the steam turbine through corresponding oil delivery pipes, and the output ends are respectively connected to the first oil change tank and the second oil change tank.

[0009] A switching mechanism is provided between the first oil change tank and the second oil change tank, and is used to switch the oil circuit connection state between the first oil change tank and the steam turbine or between the second oil change tank and the steam turbine;

[0010] Two filtration mechanisms are respectively installed inside the first oil change tank and the second oil change tank, and are located below the output end of the oil pump;

[0011] Both the first and second oil change tanks have oil inlet pipes on their side walls, which are located below the filtration mechanism; both the first and second oil change tanks have oil outlet pipes on their side walls, and each of the two oil outlet pipes has a valve on one side.

[0012] In one possible implementation, the conversion mechanism includes:

[0013] The conversion block is fixedly installed between the first oil change tank and the second oil change tank, with both ends extending into the first oil change tank and the second oil change tank respectively;

[0014] The motor is mounted on the upper surface of the conversion block;

[0015] A rotating shaft is coaxially connected to the output end of the motor.

[0016] The conversion column is fixedly installed on the side of the rotating shaft away from the motor;

[0017] The oil change pipe has its two ends respectively located at the bottom of the conversion block and inside the steam turbine;

[0018] The conversion slot is located inside the conversion block and matches the movement trajectory of the conversion column.

[0019] The switching column can be rotated to a first position under the drive of a motor to block the oil circuit of the first oil change tank and open the oil circuit of the second oil change tank, or rotated to a second position to block the oil circuit of the second oil change tank and open the oil circuit of the first oil change tank.

[0020] In one possible implementation, the conversion column is a Z-shaped structure.

[0021] In one possible implementation, the filtration mechanism includes filter screens and retaining rings; two filter screens are respectively disposed on the inner walls of the first oil change tank and the second oil change tank; two retaining rings are respectively disposed at the bottom of the corresponding filter screens and are fixedly connected to the inner walls of the corresponding first oil change tank and the second oil change tank.

[0022] In one possible implementation, two rotating mechanisms are respectively disposed on the corresponding cover plates for rotating the corresponding cover plates.

[0023] In one possible implementation, the rotating mechanism includes a fixed column, a rotating block, and a rotating handle; the fixed column is disposed on the top of the cover plate; the rotating block is sleeved on the top of the fixed column; and the rotating handle is disposed on the top of the rotating block for the operator to apply force to drive the cover plate open.

[0024] In one possible implementation, the oil filter replacement device for turbine maintenance further includes two threaded posts; the two threaded posts are respectively disposed at the bottom of the corresponding cover plates; both the first oil change tank and the second oil change tank are provided with threaded grooves adapted to the threaded posts.

[0025] In one possible implementation, the oil filter replacement device for turbine maintenance further includes two pressure gauges; the two pressure gauges are respectively embedded in the side walls of the first oil change tank and the second oil change tank, and their detection ends are respectively connected to the inner cavities of the first oil change tank and the second oil change tank, for real-time monitoring of oil pressure and feedback of the sealing status of the cover plate.

[0026] In one possible implementation, each of the two oil inlet pipes has an oil inlet box at its inlet end, both oil inlet boxes have upward openings and are equipped with baffles, and each baffle has a pull ring on one side; wherein the filter screen is located above the oil inlet pipe.

[0027] One or more technical solutions provided in this application embodiment have at least the following technical effects: The oil filter replacement device for turbine maintenance provided in this application embodiment includes a first oil change tank, a second oil change tank, a switching mechanism, two cover plates, two fixed platforms, and two filtering mechanisms. When the oil filter replacement device for turbine maintenance is in operation, the first and second oil change tanks are first spaced apart along the length of the turbine top, and the tops of the corresponding first and second oil change tanks are sealed by removable cover plates. Oil pumps, symmetrically installed on two fixed platforms on the turbine top, are connected to the oil circuit interfaces on both sides of the turbine via oil delivery pipes. At the start of the oil change operation, the switching mechanism switches the oil circuit connection state, first closing the oil circuit between the turbine and one of the oil change tanks (e.g., the first oil change tank), then starting the corresponding oil pump to extract the old oil from the turbine. The old oil enters the first oil change tank via the oil delivery pipe, where the filtering mechanism filters the old oil. Afterward, the valve on the first oil change tank is opened, and the filtered old oil is discharged through the oil outlet pipe. The valve is then closed after the old oil is completely drained. Next, the oil circuit between the turbine and the second oil change tank is connected via a switching mechanism. New oil is then added to the first oil change tank via its inlet pipe. The new oil enters the turbine via the switching mechanism, completing one oil change cycle. If the filter in the first oil change tank becomes clogged due to accumulated impurities, the oil circuit between the second oil change tank and the turbine can be closed again via the switching mechanism. Following the same procedure, the second oil change tank can then be used for subsequent oil change operations. Therefore, this device eliminates the need for direct pipe connection to the engine oil system to complete the circulation filtration operation, successfully avoiding the cumbersome pipe connection and disassembly process. This greatly simplifies the operation, reduces reliance on the professional skills of operators, and minimizes safety hazards such as lubricating oil leakage caused by human error, effectively ensuring the safety and reliability of the operation. Its simple structure and ease of operation, through the rational setting of the first and second oil change tanks and the accompanying switching mechanism, enable flexible switching of the oil change process. During oil change, it can quickly and efficiently complete the extraction, filtration, discharge, and injection of new oil, significantly improving oil change efficiency. Compared with existing devices, oil change time is significantly shortened, effectively reducing unit downtime, minimizing power generation losses caused by downtime, and improving the power plant's economic benefits. Simultaneously, when the filter mechanism in either oil change tank becomes clogged due to impurities, the switching mechanism allows for rapid switching to another oil change tank to continue the oil change operation, ensuring the continuity of the oil change work and avoiding interruptions caused by filter blockage, further improving the efficiency and stability of the entire oil change process. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A schematic diagram of the structure of an oil filter replacement device for steam turbine maintenance provided in an embodiment of this application;

[0030] Figure 2 A schematic diagram of the conversion mechanism provided in the embodiments of this application;

[0031] Figure 3 This is a schematic diagram of the structure of the filtering mechanism provided in the embodiments of this application;

[0032] Figure 4 This is a schematic diagram of the structure of the oil inlet box provided in an embodiment of this application;

[0033] Figure 5 This is a schematic diagram of the structure of the conversion column provided in an embodiment of this application.

[0034] Icons: 1-Steam turbine; 2-First oil change tank; 3-Second oil change tank; 4-Cover plate; 5-Rotating mechanism; 501-Fixed column; 502-Rotating block; 503-Rotating handle; 6-Fixed platform; 7-Oil pump; 8-Oil delivery pipe; 9-Conversion mechanism; 901-Conversion block; 902-Motor; 903-Rotating shaft; 904-Conversion column; 905-Oil change pipe; 10-Filtering mechanism; 1001-Filter screen; 1002-Fixed ring; 11-Threaded column; 12-Pressure gauge; 13-Oil inlet pipe; 14-Oil inlet box; 15-Baffle; 16-Pull ring; 17-Oil outlet pipe; 18-Valve. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the embodiments of this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0037] This application provides an oil filter replacement device for overhauling a steam turbine 1, such as... Figures 1 to 5 As shown. The oil filter replacement device for overhauling steam turbine 1 includes:

[0038] The first oil change tank 2 and the second oil change tank 3 are spaced apart along the length of the top of the turbine 1.

[0039] Two covers 4 are detachably connected to the top of the first oil change tank 2 and the second oil change tank 3, respectively.

[0040] Two fixed platforms 6 are symmetrically arranged on the top of the turbine 1, and each platform is equipped with an oil pump 7. The input ends of the two oil pumps 7 are connected to the oil circuit interfaces on both sides of the turbine 1 through corresponding oil delivery pipes 8, and the output ends are connected to the first oil change tank 2 and the second oil change tank 3, respectively.

[0041] The switching mechanism 9 is located between the first oil change tank 2 and the second oil change tank 3, and is used to switch the oil circuit connection status between the first oil change tank 2 and the steam turbine 1 or between the second oil change tank 3 and the steam turbine 1.

[0042] Two filter units 10 are respectively installed inside the first oil change tank 2 and the second oil change tank 3, and are located below the output end of the oil pump 7.

[0043] Both the first oil change tank 2 and the second oil change tank 3 are equipped with oil inlet pipes 13 on their side walls, which are located below the filter mechanism 10. Both the first oil change tank 2 and the second oil change tank 3 are equipped with oil outlet pipes 17 on their side walls, and each of the two oil outlet pipes 17 is equipped with a valve 18 on one side.

[0044] It should be noted that this device does not require direct pipe connection to the turbine oil system to complete the circulation filtration operation, avoiding cumbersome pipe connection and disassembly procedures, simplifying the operation steps, reducing reliance on the professional skills of operators, and minimizing safety hazards such as lubricating oil leakage caused by human error, thus effectively ensuring the safety and reliability of the operation process. Its simple structure and ease of operation, through the reasonable setting of the first oil change tank 2 and the second oil change tank 3, coupled with the conversion mechanism 9, achieve flexible conversion of the oil change process, enabling rapid and efficient extraction of old oil during oil changes. The oil change efficiency is significantly improved in processes such as filtration, discharge, and new oil injection. Compared with existing equipment, the oil change time is significantly shortened, effectively reducing unit downtime, minimizing power generation losses caused by downtime, and improving the economic benefits of the power plant. At the same time, when the filter mechanism 10 in any oil change tank becomes clogged due to the accumulation of impurities, the switching mechanism 9 can quickly switch to another oil change tank to continue the oil change operation, ensuring the continuity of the oil change work and avoiding interruptions in the oil change process due to the clogging of the filter mechanism 10, further improving the efficiency and stability of the entire oil change process.

[0045] In this embodiment of the application, the conversion mechanism 9 includes:

[0046] The conversion block 901 is fixedly installed between the first oil change tank 2 and the second oil change tank 3, with both ends extending into the first oil change tank 2 and the second oil change tank 3 respectively.

[0047] Motor 902 is mounted on the upper surface of converter block 901.

[0048] The rotating shaft 903 is coaxially connected to the output end of the motor 902.

[0049] The conversion column 904 is fixedly installed on the side of the rotating shaft 903 away from the motor 902.

[0050] The oil change pipe 905 is located at both ends at the bottom of the conversion block 901 and inside the turbine 1, respectively. Specifically, a filter device is installed inside the oil change pipe 905.

[0051] The conversion slot is located inside the conversion block 901 and matches the motion trajectory of the conversion column 904.

[0052] The switching column 904, driven by the motor 902, can rotate to a first position to block the oil passage of the first oil change tank 2 and open the oil passage of the second oil change tank 3, or rotate to a second position to block the oil passage of the second oil change tank 3 and open the oil passage of the first oil change tank 2. Specifically, the switching block 901 is provided with passages to the first oil change tank 2 and the second oil change tank 3 respectively.

[0053] It should be noted that, when the conversion mechanism 9 of this embodiment is working, the motor 902 is mounted on the upper surface of the conversion block 901, and its output end is coaxially connected to the rotating shaft 903. The rotating shaft 903 drives the conversion column 904, which is fixed on the side away from the motor 902, to rotate. Since the conversion block 901 has a conversion groove inside that matches the movement trajectory of the conversion column 904, when the motor 902 starts and drives the conversion column 904 to rotate, the conversion column 904 can move to different positions within the conversion groove. When the switching column 904 rotates to the first position, it will block the oil passage between the first oil change tank 2 and the oil change pipe 905, while opening the oil passage between the second oil change tank 3 and the oil change pipe 905, so that the turbine 1 and the second oil change tank 3 are connected by an oil passage; when the switching column 904 rotates to the second position, it will block the oil passage between the second oil change tank 3 and the oil change pipe 905, while opening the oil passage between the first oil change tank 2 and the oil change pipe 905, so that the turbine 1 and the first oil change tank 2 are connected by an oil passage, thereby completing the switching of the oil passage between the two oil change tanks and the turbine 1.

[0054] In this embodiment, the switching column 904 has a Z-shaped structure. The Z-shaped structure, through its compact design, enables complex oil circuit switching functions within a limited space. The internal space of the switching block 901 can be utilized more fully, making the entire device more compact and lightweight.

[0055] In this embodiment, the filtration mechanism 10 includes a filter screen 1001 and a fixing ring 1002. Two filter screens 1001 are respectively disposed on the inner walls of the first oil change tank 2 and the second oil change tank 3. Two fixing rings 1002 are respectively disposed at the bottom of the corresponding filter screen 1001 and are fixedly connected to the inner walls of the corresponding first oil change tank 2 and the second oil change tank 3.

[0056] It should be noted that the filter screen 1001 is installed on the inner wall of the oil change tank. When the old oil is drawn from the turbine 1 into the oil change tank, it flows directly through the filter screen 1001. Due to the specific pore structure of the filter screen 1001, it can effectively intercept metal wear particles, oxidation products, and other residues in the old oil, ensuring that only filtered clean oil can enter the subsequent space of the oil change tank or participate in the oil change process, thus improving the cleanliness of the old oil. Because the filter screen 1001 can effectively retain residues within the oil change tanks (first oil change tank 2 and second oil change tank 3), it avoids the circulation of residues in the oil change system, reducing the risk of secondary contamination. This ensures that the newly added lubricating oil is not affected by old oil residues before entering the turbine 1, further improving the quality of the oil change.

[0057] In this embodiment, two rotating mechanisms 5 are respectively disposed on the corresponding cover plates 4 for rotating the corresponding cover plates 4.

[0058] In this embodiment, the rotating mechanism 5 includes a fixed post 501, a rotating block 502, and a rotating handle 503. The fixed post 501 is disposed on the top of the cover plate 4. The rotating block 502 is sleeved on the top of the fixed post 501. The rotating handle 503 is disposed on the top of the rotating block 502 and is used by the operator to apply force to drive the cover plate 4 to open.

[0059] In this embodiment, the oil filter replacement device for turbine 1 maintenance further includes two threaded posts 11. The two threaded posts 11 are respectively disposed at the bottom of the corresponding cover plates 4. The first oil change tank 2 and the second oil change tank 3 are both provided with threaded grooves adapted to the threaded posts 11.

[0060] It should be noted that this application achieves a convenient and stable threaded connection between the cover plate 4 and the oil change tank by setting a threaded post 11 at the bottom of the cover plate 4 and setting an adaptive threaded groove on the oil change tank. This not only facilitates quick opening and closing of the cover plate 4 for operation and maintenance, but also effectively ensures the sealing of the oil change tank and prevents lubricating oil leakage.

[0061] In this embodiment, the oil filter replacement device for turbine 1 maintenance further includes two pressure gauges 12. The two pressure gauges 12 are respectively embedded in the side walls of the first oil change tank 2 and the second oil change tank 3, and their detection ends are respectively connected to the inner cavities of the first oil change tank 2 and the second oil change tank 3, for real-time monitoring of oil pressure and feedback of the sealing status of the cover plate 4.

[0062] In this embodiment, each of the two oil inlet pipes 13 has an oil inlet box 14 at its inlet end. Both oil inlet boxes 14 have upward-facing openings and are equipped with baffles 15 to prevent dirt from falling into them. Each baffle 15 has a pull ring 16 on one side for easy operation by the operator. The filter screen 1001 is located above the oil inlet pipes 13.

[0063] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.

[0064] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.

Claims

1. An oil filter replacement device for steam turbine maintenance, characterized in that, The first oil change drum (2) and the second oil change drum (3) are spaced apart along the length of the top of the turbine (1); Two cover plates (4) are detachably connected to the top of the first oil change tank (2) and the second oil change tank (3), respectively; Two fixed platforms (6) are symmetrically arranged on the top of the steam turbine (1), and each platform is equipped with an oil pump (7); the input ends of the two oil pumps (7) are connected to the oil circuit interfaces on both sides of the steam turbine (1) through corresponding oil delivery pipes (8), and the output ends are respectively connected to the first oil change tank (2) and the second oil change tank (3). A switching mechanism (9) is provided between the first oil change tank (2) and the second oil change tank (3) for switching the oil circuit connection state between the first oil change tank (2) and the steam turbine (1) or between the second oil change tank (3) and the steam turbine (1); Two filter mechanisms (10) are respectively installed inside the first oil change tank (2) and the second oil change tank (3), and are located below the output end of the oil pump (7); The first oil change tank (2) and the second oil change tank (3) are provided with oil inlet pipes (13) on their side walls, and the oil inlet pipes (13) are located below the filter mechanism (10); the first oil change tank (2) and the second oil change tank (3) are provided with oil outlet pipes (17) on their side walls, and valves (18) are provided on one side of each of the two oil outlet pipes (17).

2. The oil filter replacement device for steam turbine maintenance according to claim 1, characterized in that, The conversion mechanism (9) includes: The conversion block (901) is fixedly installed between the first oil change tank (2) and the second oil change tank (3), and its two ends extend into the first oil change tank (2) and the second oil change tank (3) respectively; The motor (902) is mounted on the upper surface of the conversion block (901); The rotating shaft (903) is coaxially connected to the output end of the motor (902); The conversion column (904) is fixedly disposed on the side of the rotating shaft (903) away from the motor (902); The oil change pipe (905) is located at both ends at the bottom of the conversion block (901) and inside the steam turbine (1); The conversion slot is located inside the conversion block (901) and matches the movement trajectory of the conversion column (904); The switching column (904) can be rotated to a first position under the drive of the motor (902) to block the oil circuit of the first oil change tank (2) and open the oil circuit of the second oil change tank (3), or rotated to a second position to block the oil circuit of the second oil change tank (3) and open the oil circuit of the first oil change tank (2).

3. The oil filter replacement device for steam turbine maintenance according to claim 2, characterized in that, The conversion column (904) has a Z-shaped structure.

4. The oil filter replacement device for steam turbine maintenance according to claim 1, characterized in that, The filtration mechanism (10) includes a filter screen (1001) and a retaining ring (1002); The two filter screens (1001) are respectively disposed on the inner walls of the first oil change tank (2) and the second oil change tank (3); The two fixing rings (1002) are respectively disposed at the bottom of the corresponding filter screen (1001) and are fixedly connected to the inner wall of the corresponding first oil change tank (2) and second oil change tank (3).

5. The oil filter replacement device for steam turbine maintenance according to claim 1, characterized in that, Two rotating mechanisms (5) are respectively disposed on the corresponding cover plates (4) for rotating the corresponding cover plates (4).

6. The oil filter replacement device for steam turbine maintenance according to claim 5, characterized in that, The rotating mechanism (5) includes a fixed column (501), a rotating block (502), and a rotating handle (503); The fixing post (501) is disposed on the top of the cover plate (4); The rotating block (502) is sleeved on the top of the fixed column (501); The rotating handle (503) is located on the top of the rotating block (502) and is used by the operator to apply force to drive the cover plate (4) to open.

7. The oil filter replacement device for steam turbine maintenance according to claim 1, characterized in that, It also includes two threaded columns (11); The two threaded posts (11) are respectively disposed at the bottom of the corresponding cover plates (4); Both the first oil change tank (2) and the second oil change tank (3) are provided with threaded grooves that are compatible with the threaded column (11).

8. The oil filter replacement device for steam turbine maintenance according to claim 1, characterized in that, It also includes two pressure gauges (12); The two pressure gauges (12) are respectively embedded in the side walls of the first oil change tank (2) and the second oil change tank (3), and their detection ends are respectively connected to the inner cavities of the first oil change tank (2) and the second oil change tank (3) to monitor the oil pressure in real time and provide feedback on the sealing status of the cover plate (4).

9. The oil filter replacement device for steam turbine maintenance according to claim 4, characterized in that, Both of the oil inlet pipes (13) are provided with an oil inlet box (14) at their inlet ends. Both of the oil inlet boxes (14) have their openings facing upwards and are provided with a baffle (15). Both of the baffles (15) have a pull ring (16) on one side. The filter screen (1001) is located above the oil inlet pipe (13).

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