A labyrinth oil collection device for a nuclear power plant equipment lock gate hoisting apparatus

Abstract

This utility model belongs to the technical field of rotating equipment in nuclear power plants, specifically relating to a labyrinth oil collection device for a gate lifting device in a nuclear power plant. The device includes an upper unit, a support column, and a lower unit. The upper unit is located directly above the lower unit and connected by the support column. The upper unit includes an upper base plate, an oil storage tank, and an upper end locking device. The upper base plate has several oil storage tanks, and an upper end locking device is located on one side of the upper base plate. The lower unit includes a lower base plate and a lower end locking device. Both the upper and lower units are inclined, allowing lubricating grease to flow into the oil storage tanks along the inclined direction. This device collects oil through the upper and lower units, avoiding the problems of increased radioactive waste, increased operational risks, personnel slippage, and increased additional radiation dose caused by melted lubricating grease flowing everywhere, thus improving the reliability of the equipment.

Description

Technical Field

[0001] This utility model belongs to the technical field of rotating equipment in nuclear power plants, specifically relating to a labyrinth oil collection device for a gate lifting device in a nuclear power plant. Background Technology

[0002] The equipment gate is the only equipment exit point in the nuclear island of a nuclear power plant. During commissioning and installation, it is necessary to transport major equipment such as main pumps, pressure vessels, and steam generators into the island via the equipment gate. During overhauls, it is also used to transport maintenance tools into the nuclear island, serving as a crucial link between the inside and outside of the nuclear island. During operation, the equipment gate is closed to maintain pressure inside the nuclear island and ensure system stability. The opening and closing of the equipment gate requires a power unit—the equipment gate lifting equipment. This equipment lifting equipment consists of a motor, brake, wire rope, and control devices, and is a type of lifting equipment in a narrow sense.

[0003] In existing technology, during the maintenance of equipment gates, maintenance personnel apply grease to the wire ropes and hook assemblies of the gates according to maintenance requirements to prevent damage from prolonged use. Since the gate lifting equipment is located inside the nuclear island, it will endure temperatures as high as 70°C for 18 months after the island is sealed. This can cause the grease to melt to varying degrees, flowing onto the gates, platforms at all levels, and primary circuit piping, thus creating difficulties for cleaning the island's interior. The flowing grease increases radioactive waste within the island; furthermore, grease flowing into the primary circuit piping can evaporate at high temperatures, triggering alarms and posing significant operational risks to the nuclear power plant. In addition, personnel who step on or touch the grease risk slipping or becoming contaminated, increasing the probability of radiation exposure. Utility Model Content

[0004] This utility model proposes a labyrinth oil collection device for the gate lifting equipment of nuclear power plants, which is used to solve the problem in the prior art that the lubricating grease of the equipment gate melts and flows after the island is sealed, causing damage to the nuclear power plant.

[0005] The technical solution of this utility model:

[0006] This utility model proposes a labyrinth oil collection device for a gate lifting device in a nuclear power plant. The device includes an upper unit, a support column, and a lower unit. The upper unit is located directly above the lower unit and is connected to it via the support column. The upper unit includes an upper base plate, an oil storage tank, and an upper end locking device. The upper base plate has several oil storage tanks, and the upper end locking device is located on one side of the upper base plate. The upper end locking device is used to lock onto the hook assembly of the gate. The lower unit includes a lower base plate and a lower end locking device. The lower base plate has a lower end locking device on the same side as the upper base plate where the upper end locking device is located. The lower end locking device is used to lock onto the hook of the gate. Both the upper and lower units are inclined, and lubricating grease flows into the oil storage tank along the inclined direction of the device.

[0007] In some embodiments, guide plates are provided on both sides of the upper end locking device, and the guide plates are used to allow grease to flow into the upper device.

[0008] In some embodiments, baffles are provided around both the upper and lower base plates to prevent grease from overflowing; the height of the baffles is 5 to 8 centimeters.

[0009] In some embodiments, both the upper and lower base plates are quadrilateral structures, with the lower base plate having a greater length and width than the upper base plate.

[0010] In some embodiments, the upper device has an oil overflow hole on the opposite side of the upper end locking device, and grease flows from the oil overflow hole from the upper device into the lower device; the upper device is inclined from the upper end locking device toward the oil overflow hole, and the lower device is inclined in the same direction as the upper device.

[0011] In some embodiments, the upper base plate is further provided with several baffles, which guide the grease to flow into the oil reservoir. The oil reservoirs are arranged sequentially from the side of the upper end locking device to the side of the overflow hole in the maze path. When the grease flows into the oil reservoir along the baffles, when one oil reservoir is full, the grease overflows into the next oil reservoir, and the overflowing grease flows to the lower device through the overflow hole.

[0012] In some embodiments, the lower base plate of the lower device is provided with a plurality of oil storage tanks, which are arranged side by side and are used to receive lubricating grease flowing out through the overflow hole; the lower end of the lower base plate is provided with a lower support plate, which is provided with a plurality of bolt holes, and the lower support plate is fixedly connected to the grille by bolts.

[0013] In some embodiments, the support column can extend and retract vertically to adjust the distance and angle between the upper and lower devices.

[0014] In some embodiments, the shape of the upper end locking device is designed according to the shape of the hook assembly. The upper end locking device is a rectangular structure and includes a rectangular frame and a spring plate. The two sides of the rectangular frame are connected to the upper bottom plate through the spring plate.

[0015] In some embodiments, the shape of the lower end locking device is designed according to the shape of the hook. The lower end locking device is a semi-circular structure, and the upper end locking device includes a semi-circular frame and a spring plate. The semi-circular frame is connected to the lower bottom plate through the spring plate.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model proposes a labyrinth oil collection device for gate lifting equipment in nuclear power plants. By collecting oil through upper and lower devices, it avoids the problems of increased radioactive waste, increased operational risks, personnel slipping, and increased additional radiation dose caused by melted grease flowing everywhere, thus improving the reliability of the equipment.

[0018] 2. This device is designed with two layers, which act on the hook assembly and the hook respectively. The lower layer is longer and wider than the upper layer, which intercepts oil in multiple dimensions and angles to prevent melted grease from flowing into the equipment gate and primary circuit pipelines.

[0019] 3. This device is designed with two layers connected by an adjustable support column, making it suitable for use with different equipment and increasing its practical value.

[0020] 4. This device is designed with an upper end locking device and a lower end locking device. The elastic potential energy of the spring plate plays an automatic locking role, which on the one hand prevents the device from swinging, and on the other hand eliminates the need for manual intervention and adjustment. It can be used for oil receiving equipment of various sizes.

[0021] 5. This device is designed with baffles and oil storage tanks in the upper part, forming a labyrinth path for the flow of lubricating grease. This design increases the flow path of the melted grease, causing oil vapor to evaporate and preventing excessive accumulation and overflow of melted grease. On the other hand, by making reasonable use of the device's position design, multiple labyrinth oil storage tanks are designed along the flow path, storing oil from top to bottom. This ensures that each oil storage tank can serve its purpose of storing oil, avoiding the oil overflow phenomenon caused by conventional devices storing oil from bottom to top. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a labyrinth oil collection device for a gate lifting device in a nuclear power plant, as proposed in this utility model.

[0023] Figure 2 This is a schematic diagram of the lower support plate of a labyrinth oil collection device for a gate lifting device in a nuclear power plant, according to the present invention.

[0024] Figure 3 This is a schematic diagram of the upper end locking device of the labyrinth oil collection device for the gate lifting equipment of a nuclear power plant according to the present invention;

[0025] Figure 4 This is a schematic diagram of the lower end locking device of the labyrinth oil collection device for the gate lifting equipment of a nuclear power plant according to the present invention;

[0026] Figure descriptions: 1. Upper end locking device; 2. Upper device; 3. Labyrinth oil storage tank; 4. Overflow hole; 5. Oil storage tank; 6. Lower device; 7. Bolt holes of lower support plate; 8. Lower support plate; 9. Support column; 10. Lower end locking device. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] like Figures 1 to 4 As shown, this utility model proposes a labyrinth oil collection device for a gate lifting device in a nuclear power plant. The device includes an upper device 2, two support columns 9, and a lower device 6. The upper device 2 is located on top of the lower device 6, and the upper device 2 and the lower device 6 are connected by the two support columns 9.

[0029] The upper device 2 includes an upper base plate, oil reservoirs 5, overflow holes 4, and an upper end locking device 1. The upper device 2 has a quadrilateral structure. The overflow hole 4 is located on one side of the upper base plate, and the upper end locking device 1 is located on the other side. The upper device 2 is designed with an incline, with the upper end locking device 1 positioned higher and the overflow hole 4 positioned lower. A guide plate is installed at the upper end locking device 1 to allow grease to flow into the upper device 2. Several oil reservoirs 5 are provided on the upper base plate, arranged sequentially from the upper end locking device 1 side to the overflow hole 4 side. Several baffles are also provided on the upper base plate, forming a maze-like path. Grease flows sequentially into the oil reservoirs 5 along the baffle path. When an oil reservoir 5 is full, it overflows into the next oil reservoir 5. Finally, the overflowing grease flows through the overflow hole 4 to the lower device 6 and back into the oil reservoirs 5. A 5-8cm baffle is designed around the perimeter of the upper bottom plate to prevent oil spillage. The opening of the upper end locking device 1 is designed as a hook assembly, which serves to provide upper support and intercept oil. The upper end locking device 1 is specifically a rectangular structure, which includes a rectangular frame and a spring plate. The two sides of the rectangular frame are connected to the upper bottom plate through the spring plate.

[0030] The support column 9 is a component that connects the upper device 2 and the lower device 6. The support column 9 can extend and retract vertically to adjust the distance and angle between the upper device 2 and the lower device 6.

[0031] The lower unit 6 is inclined, with the inclination direction being the same as that of the upper unit 2. The lower unit 6 includes a lower base plate, a lower end locking device 10, and an oil reservoir 5. The lower base plate has a quadrilateral structure, and its length and width are both greater than those of the upper base plate. Several parallel oil reservoirs 5 are provided on the lower base plate, and the oil reservoirs 5 of the lower unit 6 are used to receive the lubricating grease flowing out through the overflow hole 4. A lower support plate 8 is provided at the lower end of the lower base plate, and the lower support plate 8 has 4 bolt holes. The lower support plate 8 is fixedly connected to the grille by bolts. The lower end locking device 10 is designed according to the shape of the hook. The lower end locking device 10 has a semi-circular structure. The upper end locking device 10 includes a semi-circular frame and a spring plate. The semi-circular frame is connected to the lower base plate through the spring plate.

[0032] This utility model proposes a labyrinth oil collection device for a gate lifting device in a nuclear power plant. The specific usage of this device is as follows:

[0033] like Figure 1 As shown, this device is connected to the upper device 2 and the lower device 6 by two support columns 9. The support columns 9 can extend and retract vertically to adjust the distance and angle between the upper and lower devices 6.

[0034] This device is secured by an upper end locking device 1 (as the first support point), a lower end locking device 10 (as the second support point), and a lower support plate 8 (as the lower support point). The lower support plate 8 (as the lower support point) is used to fix the device and the grid together with bolts through bolt holes to prevent tilting and tipping. The upper end locking device 1 uses the spring potential energy of the spring plate to self-lock onto the hook assembly. When the upper end locking device 1 is fixed to the hook assembly, the spring plates on both sides are compressed, clamping and fixing the hook assembly to the upper end locking device 1. Similarly, the lower end locking device 10 uses the spring potential energy of the spring plate to self-lock onto the hook. When the lower end locking device 10 is fixed to the hook, the semi-circular spring plate is compressed, clamping and fixing the hook to the lower end locking device 10.

[0035] The maze oil collection device is placed at an angle. The melted grease on the hook assembly is intercepted by the upper end locking device 1 and the guide plate, and then enters the upper device 2 and flows into the maze by gravity. It enters the oil storage tanks 5 of multiple upper devices 2 in sequence according to the path. When a certain oil storage tank 5 is full, it will overflow into the next oil storage tank 5. Finally, the overflowing grease flows into the oil storage tank 5 of the lower device 6 through the overflow hole 4.

[0036] If the melted lubricating grease is not successfully intercepted by the hook assembly, it will be intercepted by the lower end locking device 10 and flow into the device to complete the oil collection.

[0037] The embodiments of this utility model have been described in detail above. This utility model is not limited to the above examples. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this utility model.

Claims

1. A labyrinth oil collection device for a gate lifting system in a nuclear power plant, characterized in that, The device includes an upper device (2), a support column (9), and a lower device (6). The upper device (2) is located directly above the lower device (6). The upper device (2) and the lower device (6) are connected by the support column (9). The upper device (2) includes an upper base plate, an oil storage tank (5), and an upper end locking device (1). The upper base plate is provided with several oil storage tanks (5). An upper end locking device (1) is provided on one side of the upper base plate. The device (1) is used to lock on the hook assembly of the equipment gate; the lower device (6) includes a lower base plate and a lower end locking device (10). The lower base plate is provided with the lower end locking device (10) on the same side as the upper base plate where the upper end locking device (1) is provided. The lower end locking device (10) is used to lock on the hook of the equipment gate; the upper device (2) and the lower device (6) are both inclined. The grease flows into the oil storage tank (5) along the inclined direction of the device.

2. The labyrinth oil collection device for a gate lifting device in a nuclear power plant according to claim 1, characterized in that, The upper end locking device (1) is provided with guide plates on both sides, which are used to allow grease to flow into the upper device (2).

3. The labyrinth oil collection device for a gate lifting device in a nuclear power plant according to claim 2, characterized in that, Both the upper and lower base plates are equipped with baffles around their perimeter to prevent grease from overflowing; the height of the baffles is 5 to 8 centimeters.

4. The labyrinth oil collection device for a gate lifting device in a nuclear power plant according to claim 3, characterized in that, Both the upper and lower base plates are quadrilateral structures, with the lower base plate being longer and wider than the upper base plate.

5. A labyrinth oil collection device for a gate lifting device in a nuclear power plant according to claim 4, characterized in that, The upper device (2) is provided with an oil overflow hole (4) on the opposite side of the upper end locking device (1). The grease flows from the upper device (2) into the lower device (6) through the oil overflow hole (4). The upper device (2) is inclined from the upper end locking device (1) toward the oil overflow hole (4), and the lower device (6) is inclined in the same direction as the upper device (2).

6. The labyrinth oil collection device for a gate lifting device in a nuclear power plant according to claim 5, characterized in that, The upper bottom plate is also provided with several partitions, which guide the grease to flow into the oil storage tank (5); the partitions form a maze path on the upper bottom plate, and the oil storage tank (5) is arranged sequentially from the side of the upper end locking device (1) to the side of the overflow hole (4) in the maze path. When the grease flows into the oil storage tank (5) along the partition, when one oil storage tank (5) is full, the grease overflows into the next oil storage tank (5), and the overflowed grease flows to the lower device (6) through the overflow hole (4).

7. A labyrinth oil collection device for a gate lifting device in a nuclear power plant according to claim 6, characterized in that, The lower base plate of the lower device (6) is provided with a plurality of oil storage tanks (5), the oil storage tanks (5) of the lower device (6) are arranged side by side, and the oil storage tanks (5) of the lower device (6) are used to receive the lubricating grease flowing out through the overflow hole (4); the lower end of the lower base plate is provided with a lower support plate (8), the lower support plate (8) is provided with a plurality of bolt holes, and the lower support plate (8) is fixedly connected to the grille by bolts.

8. A labyrinth oil collection device for a gate lifting device in a nuclear power plant according to claim 7, characterized in that, The support column (9) can extend and retract vertically to adjust the distance and angle between the upper device (2) and the lower device (6).

9. A labyrinth oil collection device for a gate lifting device in a nuclear power plant according to claim 1, characterized in that, The upper end locking device (1) is designed according to the shape of the hook assembly. The upper end locking device (1) is a rectangular structure. The upper end locking device (1) includes a rectangular frame and a spring plate. The two sides of the rectangular frame are connected to the upper bottom plate through the spring plate.

10. A labyrinth oil collection device for a gate lifting device in a nuclear power plant according to claim 1, characterized in that, The shape of the lower end locking device (10) is designed according to the shape of the hook. The lower end locking device (10) is a semi-circular structure. The upper end locking device (1) includes a semi-circular frame and a spring plate. The semi-circular frame is connected to the lower bottom plate through the spring plate.

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