Bearing oiling device, drum screen drive device and nuclear power plant cooling source system

Abstract

The utility model discloses a bearing oiling device, drum filter screen drive arrangement and nuclear power plant cold source system. Bearing oiling device is applied to drum filter screen drive arrangement, and drum filter screen drive arrangement includes drive long shaft, gear and first bearing. Bearing oiling device includes overhaul platform, first through -hole, first apron and oiling pipeline. Overhaul platform is located the top of drum filter screen drive arrangement. First through -hole is penetrated with the upper and lower sides of overhaul platform. First apron has open state and closed state. In open state, first through -hole is exposed. In closed state, first apron covers first through -hole. Oiling pipeline includes opposite first end and second end along its extension path, and first end is connected with the oiling port on first bearing. In open state, the second end of oiling pipeline, the partial of first bearing and the partial of gear are exposed to first through -hole, and the opening area of first through -hole can be designed very small, thereby reducing the risk of personnel falling and getting hurt from first through -hole.

Description

Technical Field

[0001] This utility model relates to the field of driving technology for drum-shaped filters in nuclear power plants, and in particular to a bearing oil injection device, a drum-shaped filter driving device, and a nuclear power plant cold source system. Background Technology

[0002] The drum filter in a nuclear power plant is the last-stage large-scale filtration device in the plant's "defense-in-depth" system for cooling sources, protecting against marine organisms. It rotates at a constant speed to filter and remove contaminants from the water, significantly impacting the safety of the cooling source and the stability of the units. The drum filter's rotation is powered by a dedicated drive unit. Routine maintenance requires inspecting and repairing the drive unit's equipment and components to ensure its proper functioning, which in turn ensures the drum filter's normal operation. Drive unit maintenance includes lubricating bearings; typically, this is done every two weeks. With multiple units in a nuclear power plant, this translates to up to 288 lubrication operations per year. The traditional approach to this operation involves workers lifting a large cover on the maintenance platform to expose most of the equipment parts, including the drum filter and drive unit. The maintenance platform is located nearly 20 meters below the equipment. At the same time, workers are fully exposed to the area where the drum filter and drive unit gears are in operation. Workers are required to wear safety ropes and safety belts, but the risks of falling from height, drowning, and being caught in equipment are still extremely high, classifying this operation as a Level 2 high-risk operation. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a bearing oil injection device, a drum-shaped filter drive device, and a nuclear power plant cold source system that improves the safety of personnel operation, in response to at least one of the defects mentioned in the background technology.

[0004] The technical solution adopted by this utility model to solve its technical problem is: to provide a bearing oil injection device, which is applied to a drum-shaped filter drive device. The drum-shaped filter drive device includes a drive shaft, a gear and a first bearing; the drive shaft includes an output end near the drum-shaped filter and an input end away from the drum-shaped filter, the gear is connected to the end of the output end, and the first bearing is connected to the drive shaft and located on the side of the gear near the input end;

[0005] The bearing oil injection device includes a maintenance platform, a first through hole, a first cover plate, and an oil injection pipeline;

[0006] The maintenance platform is located above the drum-shaped filter drive device;

[0007] The first through hole connects the upper and lower sides of the maintenance platform;

[0008] The first cover plate has an open state and a closed state; in the open state, the first through hole is exposed; in the closed state, the first cover plate covers the first through hole.

[0009] The oil injection line includes a first end and a second end along its extension path, the first end being connected to the oil injection port on the first bearing;

[0010] In the open state, the second end of the oil injection line, a portion of the first bearing, and a portion of the gear are exposed to the first through hole.

[0011] Preferably, the bearing oil injection device further includes a second through hole and a second cover plate;

[0012] The second through hole is formed on the maintenance platform, and passes through the upper and lower sides of the maintenance platform;

[0013] The second cover plate covers the second through hole and can be opened and closed relative to the second through hole;

[0014] The first through hole is formed on the second cover plate, and the first cover plate can translate or rotate relative to the second cover plate to switch between an open state and a closed state.

[0015] Preferably, the bearing oil injection device further includes a hinge structure connected between the first cover plate and the second cover plate, so that the first cover plate can rotate relative to the second cover plate.

[0016] Preferably, the bearing oil injection device further includes a protective railing structure disposed on the outer periphery of the second cover plate.

[0017] Preferably, both the first cover plate and the second cover plate are made of stainless steel.

[0018] Preferably, the length of the first through hole is 180 mm and the width of the first through hole is 150 mm.

[0019] Preferably, the bearing oil injection device further includes a fixing component, which is connected to the maintenance platform;

[0020] With the first through hole exposed, the fastener is at least partially exposed to the first through hole;

[0021] The portion of the fastener exposed in the first through hole is provided with a limiting hole, and the oil injection pipe passes through the limiting hole to fix the second end of the oil injection pipe.

[0022] This utility model also provides a drum-shaped filter drive device, which includes a drive shaft, a gear and a first bearing;

[0023] The drive shaft includes an output end near the drum-shaped filter and an input end away from the drum-shaped filter;

[0024] The gear is connected to the end of the output terminal and is used to connect to the drum-shaped filter screen;

[0025] The first bearing is connected to the drive shaft and located on the side of the gear near the input end. The first bearing is lubricated by the bearing lubrication device described in any of the above-mentioned embodiments.

[0026] Preferably, the drum-shaped filter drive device further includes a second bearing, a reducer, and multiple motors;

[0027] The second bearing is connected to the drive shaft and is located on the side of the first bearing closer to the input end;

[0028] The plurality of motors are respectively connected to the reducer;

[0029] The reducer is connected to the input end of the drive shaft and is used to drive the drive shaft to rotate.

[0030] This utility model also provides a nuclear power plant cold source system, which includes a drum-shaped filter, a bearing oil injection device as described in any one of the above, and a drum-shaped filter drive device as described in any one of the above.

[0031] The drum-shaped filter drive device is connected to the drum-shaped filter in a transmission manner, and is used to drive the drum-shaped filter to rotate;

[0032] The bearing oil filling device is used to fill at least one bearing of the drum-shaped filter drive device with lubricating oil.

[0033] This invention offers at least the following advantages: With the first cover open, the second end of the oil injection pipe, a portion of the first bearing, and a portion of the gear are exposed to the second through hole. At this time, workers can inject lubricating oil into the second end of the oil injection pipe. The lubricating oil flows through the pipe into the interior of the first bearing, lubricating it and ensuring its proper function. Simultaneously, workers can directly observe portions of the first bearing and gear through the first through hole, thereby assessing the bearing's condition and the gear's rotation. Because only portions of the first bearing and gear are exposed to the first through hole, the opening area of ​​the first through hole can be designed to be very small, reducing the risk of personnel falling through and sustaining injury, and improving the safety of lubricating the bearings of the drum filter drive unit in nuclear power plants. Attached Figure Description

[0034] To more clearly illustrate the technical solution of this utility model, the following will further describe this utility model in conjunction with the accompanying drawings and embodiments. In the drawings:

[0035] Figure 1 This is a top view schematic diagram of the bearing oil injection device in some embodiments of this utility model;

[0036] Figure 2 yes Figure 1 A partially enlarged schematic diagram of the bearing oil injection device shown.

[0037] Figure 3 This is a front view structural schematic diagram of the bearing oil injection device in some embodiments of this utility model;

[0038] Figure 4 yes Figure 3 Enlarged structural diagram of section A;

[0039] Figure 5 This is a partial three-dimensional structural schematic diagram of the bearing oil injection device in some embodiments of this utility model;

[0040] Figure 6 This is a partial side view of the bearing oil injection device in some embodiments of this utility model;

[0041] Figure 7 This is a three-dimensional structural schematic diagram of the nuclear power plant cold source system in some embodiments of this utility model. Detailed Implementation

[0042] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0043] The terms "first," "second," and "third," etc., are used only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0044] Please see Figures 1 to 4This utility model discloses a bearing lubrication device applied to a drum filter drive device for lubricating the bearings of the drum filter drive device. The drum filter drive device is used to drive the drum filter 3 to rotate. The drum filter drive device includes at least a drive shaft 11, a gear 12, and a first bearing 13. The drive shaft 11 includes an output end 112 near the drum filter 3 and an input end 111 away from the drum filter 3. The gear 12 is connected to the end of the output end 112. The first bearing 13 is connected to the drive shaft 11 and located on the side of the gear 12 near the input end 111. The first bearing 13 is sleeved on the drive shaft 11.

[0045] The bearing oiling device includes at least a maintenance platform 21, a first through hole 22, a first cover plate 23, and an oiling pipeline 24. The maintenance platform 21 is located above the drum filter drive device. The maintenance platform 21 provides a working surface for personnel to inspect and maintain the drum filter 3 and the drum filter drive device. The first through hole 22 connects the upper and lower sides of the maintenance platform 21. The first cover plate 23 has an open state and a closed state. In the open state, the first through hole 22 is exposed, allowing personnel to inspect and maintain the drum filter drive device below. In the closed state, the first cover plate 23 covers the first through hole 22, isolating the upper and lower sides of the first through hole 22 to prevent foreign objects from falling into the drum filter drive device or causing injury to personnel. The oiling pipeline 24 includes a first end and a second end along its extension path, with the first end connected to the oiling port on the first bearing 13. The design location of the oil inlet on the first bearing 13 depends on the type, structure, and usage requirements of the first bearing 13. For example, if the first bearing 13 is a deep groove ball bearing, the oil inlet is usually located at the upper end of the bearing housing, and the oil outlet is located at the lower end of the bearing housing. After the lubricating oil is injected from the upper oil inlet, it flows through the bearing rolling elements and raceways under gravity and is finally discharged from the bottom. If the first bearing 13 is an externally oiled tapered roller bearing, the oil inlet is located in the middle of the outer sleeve. After the lubricating oil is injected from the oil inlet, it flows along the annular gap between the outer and inner sleeves, enters the roller area through the oil inlet on the side of the cage (cage), and is finally discharged from the other end.

[0046] With the first cover plate 23 open, the second end of the oil injection pipe 24, a portion of the first bearing 13, and a portion of the gear 12 are exposed to the second through hole 25. At this time, workers can inject lubricating oil into the second end of the oil injection pipe 24. The lubricating oil flows through the oil injection pipe 24 into the interior of the first bearing 13, lubricating it and ensuring its proper function. Simultaneously, workers can directly observe a portion of the first bearing 13 and a portion of the gear 12 through the first through hole 22, thereby determining the condition of the first bearing 13 and the rotation of the gear 12. Since only a portion of the first bearing 13 and gear 12 are exposed to the first through hole 22, the opening area of ​​the first through hole 22 can be designed to be very small. This helps to minimize the risk of personnel falling and being injured through the first through hole 22, improving the safety of lubricating the bearings of the drum filter drive unit in nuclear power plants.

[0047] In some embodiments, the length of the first through hole 22 is 180mm and the width is 150mm. The area of ​​this size is smaller than that of a safety shoe, virtually eliminating the risk of falls. The size of the first cover plate 23 can be the same as or slightly larger than the size of the first through hole 22. This innovation completely changes the traditional operating mode, eliminating the need for workers to wear cumbersome safety ropes and harnesses, achieving a win-win situation for both safety and efficiency. Because the first bearing 13 and gear 12 are only partially exposed through the first through hole 22, the area of ​​the first through hole 22 can be designed to be very small, allowing workers to safely and conveniently observe the bearing's operating status. Traditionally, seven people are needed to lubricate the bearings of the drum filter drive device; by reducing the area of ​​the first through hole 22, only three people are needed to efficiently complete the task, significantly reducing the manpower, material resources, and time costs required for high-risk management, achieving a dual improvement in safety and economic benefits.

[0048] like Figures 1 to 5As shown, in some embodiments, the bearing oil injection device further includes a second through hole 25 and a second cover plate 26. The area of ​​the second through hole 25 is larger than that of the first through hole 22, and the area of ​​the second cover plate 26 is larger than that of the first cover plate 23. The second through hole 25 is formed on the maintenance platform 21, passing through the upper and lower sides of the maintenance platform 21. The second cover plate 26 covers the second through hole 25 and can be opened and closed relative to the second through hole 25. That is, the second cover plate 26 is hinged to the maintenance platform 21, and the second cover plate 26 can be flipped up and down relative to the maintenance platform 21 to cover or expose the second through hole 25. When the second cover plate 26 is open, the gear 12 of the drum filter drive device, the large gear ring on the drum filter 3, the drive shaft 11, and the first bearing 13 can all be exposed. Personnel can observe the meshing state of the large gear ring on the drum filter 3 and the gear 12 at the second through hole 25, and can also observe the rotation state of the drum filter 3. However, the second through-hole 25 has a large area, posing a significant risk of falls for personnel approaching it, which is highly detrimental to operational safety. In some embodiments, the area of ​​the first through-hole 22 is less than one-quarter the area of ​​the second cover plate 26. The smaller first through-hole 22 is formed on the second cover plate 26, and the first cover plate 23 can translate or rotate relative to the second cover plate 26 to switch between an open and closed state. Thus, in some existing nuclear power plants, simply creating a smaller first through-hole 22 on the existing larger second cover plate 26 and adding a first cover plate 23 can reduce the working area for bearing lubrication, thereby improving personnel safety. Furthermore, the existing larger second cover plate 26 and second through-hole 25 can continue to be used; the second cover plate 26 can be opened when a wider inspection view is needed. If only bearing lubrication work is required to observe the operating status of gear 12 and the first bearing 13, only the first cover plate 23 needs to be opened to observe through the first through-hole 22. This approach reduces the cost of retrofitting existing nuclear power plants while ensuring operational safety.

[0049] In some embodiments, the bearing oil injection device further includes a hinge structure connected between the first cover plate 23 and the second cover plate 26, allowing the first cover plate 23 to rotate relative to the second cover plate 26. Specifically, the hinge structure can be a hinge structure, with one edge of the first cover plate 23 and one outer edge of the first through hole 22 respectively connected to the hinge structure, thereby achieving a hinge between the first cover plate 23 and the second cover plate 26. The first cover plate 23 can be flipped up and down relative to the first through hole 22 to switch between an open state and a closed state.

[0050] In some embodiments, the bearing lubrication device further includes a protective barrier structure disposed on the outer periphery of the second cover plate 26. The protective barrier structure can enclose at least a portion of the outer periphery of the second cover plate 26, thereby delineating a danger zone for warning personnel and preventing accidental entry into the second cover plate 26. This improves the safety of drive unit maintenance operations.

[0051] In some embodiments, both the first cover plate 23 and the second cover plate 26 are made of stainless steel. On one hand, stainless steel is corrosion-resistant, making it suitable for the humid seawater environment above the drum filter 3, thus increasing the service life of both the first cover plate 23 and the second cover plate 26. On the other hand, since the first cover plate 23 and the second cover plate 26 are made of the same material, a smaller piece of material can be cut from the larger second cover plate 26 of an existing nuclear power plant to serve as the first cover plate 23. This results in low modification costs and ease of operation.

[0052] like Figure 5 and Figure 6 As shown, in some embodiments, the bearing lubrication device further includes a fixing member 27, which is connected to the maintenance platform 21. Specifically, as... Figure 6 As shown, in some embodiments, the fastener 27 is connected to the lower surface of the maintenance platform 21 (i.e., the surface of the maintenance platform 21 facing the drum-shaped filter 3). Further, the fastener 27 can be welded to the lower surface of the maintenance platform 21. A portion of the upper surface of the fastener 27 is connected to the maintenance platform 21, while another portion is exposed to the first through-hole 22. With the first through-hole 22 exposed, the fastener 27 is at least partially exposed to it. That is, the fastener 27 can be partially or completely exposed to the first through-hole 22. The portion of the fastener 27 exposed to the first through-hole 22 is provided with a limiting hole, through which the oil injection pipe 24 passes to fix the second end of the oil injection pipe 24. Thus, the second end of the oil injection pipe 24 can be fixed to the edge of the first through-hole 22 via the fastener 27.

[0053] like Figure 1 , Figure 3 and Figure 7 As shown, in some embodiments, the present invention also provides a drum-shaped filter drive device, which includes a drive shaft 11, a gear 12, and a first bearing 13. The drive shaft 11 includes an output end 112 near the drum-shaped filter 3 and an input end 111 away from the drum-shaped filter 3. The gear 12 is connected to the end of the output end 112 and is used to connect the drum-shaped filter 3. A large gear ring on the drum-shaped filter 3 meshes with the gear 12. The first bearing 13 is connected to the drive shaft 11 and is located on the side of the gear 12 near the input end 111. The first bearing 13 is lubricated by a bearing lubrication device of any embodiment.

[0054] Furthermore, in some embodiments, the drum filter drive device further includes a second bearing 14, a reducer 15, and multiple motors 16. The second bearing 14 is connected to the drive shaft 11 and is located on the side of the first bearing 13 near the input end 111. The multiple motors 16 are respectively connected to the reducer 15. The reducer 15 is connected to the input end 111 of the drive shaft 11 and is used to drive the drive shaft 11 to rotate. The multiple motors 16 input torque to the reducer 15. After being reduced by the reducer 15, the reducer 15 outputs torque to the drive shaft 11, which drives the gear 12 to rotate, and the gear 12 drives the drum filter 3 to rotate.

[0055] The first bearing 13 is located near the output end 112, and the second bearing 14 is located near the input end 111. In some embodiments, the second bearing 14 can also be lubricated using a bearing lubrication device of any embodiment. That is, the first end of the lubrication line 24 can also be connected to the lubrication port on the second bearing 14.

[0056] In some embodiments, the present invention also provides a drum filter drive system, which includes a bearing oiling device of any embodiment and a drum filter drive device of any embodiment. The bearing oiling device and the drum filter drive device are connected via oil inlets on at least one bearing, and the bearing oiling device is used to add lubricating oil to at least one bearing of the drum filter drive device.

[0057] like Figure 3 and Figure 7 As shown, in some embodiments, the present invention also provides a nuclear power plant cooling system, which includes a drum-shaped filter 3 and the drum-shaped filter drive system described above. In other words, the nuclear power plant cooling system includes a drum-shaped filter 3, a bearing lubrication device of any of the above embodiments, and a drum-shaped filter drive device of any of the above embodiments. The drum-shaped filter drive device and the drum-shaped filter 3 are connected by a transmission connection and are used to drive the drum-shaped filter 3 to rotate. The bearing lubrication device is used to lubricate at least one bearing of the drum-shaped filter drive device.

[0058] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A bearing oil injection device, applied to a drum-shaped filter drive device, characterized in that, The drum filter drive device includes a drive shaft (11), a gear (12), and a first bearing (13); the drive shaft (11) includes an output end (112) near the drum filter (3) and an input end (111) away from the drum filter (3); the gear (12) is connected to the end of the output end (112); and the first bearing (13) is connected to the drive shaft (11) and located on the side of the gear (12) near the input end (111). The bearing oil injection device includes an inspection platform (21), a first through hole (22), a first cover plate (23), and an oil injection pipeline (24); The maintenance platform (21) is located above the drum-shaped filter drive device; The first through hole (22) passes through the upper and lower sides of the maintenance platform (21); The first cover plate (23) has an open state and a closed state; in the open state, the first through hole (22) is exposed; in the closed state, the first cover plate (23) covers the first through hole (22); The oil injection line (24) includes a first end and a second end along its extension path, the first end being connected to the oil injection port on the first bearing (13); In the open state, the second end of the oil injection line (24), a portion of the first bearing (13) and a portion of the gear (12) are exposed to the first through hole (22).

2. The bearing oiling device of claim 1, wherein The bearing oil injection device also includes a second through hole (25) and a second cover plate (26); The second through hole (25) is formed on the maintenance platform (21) and passes through the upper and lower sides of the maintenance platform (21); The second cover plate (26) covers the second through hole (25) and can be opened and closed relative to the second through hole (25); The first through hole (22) is formed on the second cover plate (26), and the first cover plate (23) can translate or rotate relative to the second cover plate (26) so that the first cover plate (23) can switch between an open state and a closed state.

3. The bearing oiling device of claim 2, wherein The bearing oil injection device also includes a hinge structure, which is connected between the first cover plate (23) and the second cover plate (26), so that the first cover plate (23) can rotate relative to the second cover plate (26).

4. The bearing oiling device of claim 2, wherein The bearing oil injection device also includes a protective railing structure disposed on the outer periphery of the second cover plate (26).

5. The bearing oiling device of claim 2, wherein Both the first cover plate (23) and the second cover plate (26) are made of stainless steel.

6. The bearing oiling device of claim 1, wherein The length of the first through hole (22) is 180mm and the width of the first through hole (22) is 150mm.

7. The bearing oiling device of claim 1, wherein The bearing oil injection device also includes a fixing component (27), which is connected to the maintenance platform (21); With the first through hole (22) exposed, the fastener (27) is at least partially exposed to the first through hole (22); The portion of the fastener (27) exposed in the first through hole (22) is provided with a limiting hole, and the oil injection line (24) passes through the limiting hole to fix the second end of the oil injection line (24).

8. A drum screen drive apparatus, characterized by, Includes a drive shaft (11), a gear (12), and a first bearing (13); The drive shaft (11) includes an output end (112) near the drum-shaped filter (3) and an input end (111) away from the drum-shaped filter (3); The gear (12) is connected to the end of the output end (112) and is used to connect the drum-shaped filter screen (3); The first bearing (13) is connected to the drive shaft (11) and is located on the side of the gear (12) near the input end (111). The first bearing (13) is lubricated by the bearing lubrication device according to any one of claims 1 to 7.

9. The drum screen drive apparatus of claim 8, wherein, The drum-shaped filter drive device also includes a second bearing (14), a reducer (15), and multiple motors (16); The second bearing (14) is connected to the drive shaft (11) and is located on the side of the first bearing (13) near the input end (111); The plurality of motors (16) are respectively connected to the reducer (15); The reducer (15) is connected to the input end (111) of the drive shaft (11) for driving the drive shaft (11) to rotate.

10. A nuclear power plant cold source system, characterized by, Includes a drum-shaped filter screen (3), a bearing oil injection device according to any one of claims 1 to 7, and a drum-shaped filter screen driving device according to any one of claims 8 and 9; The drum-shaped filter drive device is connected to the drum-shaped filter (3) and is used to drive the drum-shaped filter (3) to rotate; The bearing oil filling device is used to fill at least one bearing of the drum-shaped filter drive device with lubricating oil.

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