A partition device for nuclear waste disposal in a nuclear power plant
By designing the linkage and rocker arm structure of the isolation device, combined with the actuator drive reduction gearbox and orthogonal bevel gears, the sealing and stability of nuclear waste transportation in nuclear power plants were achieved, solving the problems of radioactive gas leakage and transportation, and ensuring safety and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHIJIAZHUANG NO 1 VALVE FACTORY
- Filing Date
- 2025-04-16
- Publication Date
- 2026-06-19
AI Technical Summary
There is a risk of radioactive gas leakage during the reprocessing of nuclear waste at existing nuclear power plants, and the hoisting equipment cannot simultaneously achieve the functions of sealing and hoisting, resulting in safety and efficiency issues.
A partition device was designed, which uses a left sealing plate and a right sealing plate connected by a rotating shaft. Combined with a connecting rod and rocker arm structure, and using an actuator to drive a reduction gearbox and an orthogonal bevel gear structure, the sealing plate can be opened and closed at all angles and precisely adjusted to ensure sealing and stability during hoisting.
It achieves effective sealing of radioactive gases, prevents unintended escape, improves the safety and stability of the hoisting process, extends the service life of key components, and supports the safe hoisting of irregularly shaped objects.
Smart Images
Figure CN224383920U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of nuclear waste treatment technology and relates to a separation device for nuclear power plants to treat nuclear waste. Background Technology
[0002] Nuclear waste reprocessing is a crucial part of the nuclear fuel cycle, improving resource utilization and reducing the long-term environmental impact of nuclear waste. During reprocessing, exhaust gas leaks pose a serious environmental and safety concern. Because reprocessing involves highly radioactive materials, the exhaust gases may contain radioactive and chemically toxic gases. Leaks could cause radiation hazards and chemical pollution to workers, the public, and the environment. Therefore, effectively preventing and responding to exhaust gas leaks is essential to ensuring the safety and environmental friendliness of nuclear waste reprocessing.
[0003] The reprocessing of nuclear waste at nuclear power plants has drawbacks, including the risk of radioactive gas leaks. To address this challenge, on-site investigations and photographs revealed a need for a device that serves both a sealing function to control leaks and a hoisting mechanism to facilitate the movement of internal and external components. However, these two functions are contradictory: a device must simultaneously provide sealing, be hoistable from the center, and ensure long-term stable operation. Furthermore, space constraints and weight limitations have significantly hampered the device's development. Meanwhile, similar problems exist abroad, but they utilize air pumps to extract leaked air, which is extremely labor-intensive and time-consuming. Summary of the Invention
[0004] To achieve the above objectives, this utility model provides a separation device for handling nuclear waste in nuclear power plants, which effectively solves the problems of radioactive material leakage and object hoisting in nuclear facilities.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a partition device for handling nuclear waste in a nuclear power plant, comprising a left sealing plate and a right sealing plate, characterized in that the left sealing plate and the right sealing plate are respectively connected to a rotating shaft, and the left sealing plate and the right sealing plate are respectively rotated through the rotating shaft, the rotating shaft is hinged and fixed on the body of the partition device, the left sealing plate is connected to a left connecting rod I through a pin, and the right sealing plate is connected to a right connecting rod I through another pin.
[0006] The left connecting rod I is connected to the rocker arm A by a pin, and the right connecting rod I is connected to the rocker arm B by another pin. The rocker arm A and the rocker arm B are respectively mounted on the body of the partition device by corresponding pins.
[0007] The rocker arm A is connected to the left connecting rod II via a pin, and the other end of the left connecting rod II is connected to the rocker arm via a pin. The rocker arm B is connected to the right connecting rod II via a pin, and the other end of the right connecting rod II is connected to the rocker arm via a pin. The rocker arm is mounted on the body of the partition device via a spindle.
[0008] One end of the spindle is connected to the rocker arm, and the other end of the spindle is connected to the bevel gear of the angle box A. The angle box A is connected to the rocker arm through the spindle. The driving gear inside the angle box A is coaxially connected to the spindle, and the driven gear inside the angle box A is coaxially connected to the transmission shaft. The transmission shaft is coaxially connected to the driving gear inside the angle box B, and the driven gear inside the angle box B is coaxially connected to the drive shaft of the reduction gearbox.
[0009] The upper and lower ends of the device are connected to the pipe by fasteners.
[0010] Preferably, the contact surfaces of the left and right sealing plates are inclined at 45 degrees, and sealing rings are installed inside the left and right sealing plates, the sealing rings having radiation resistance.
[0011] Preferably, the gearbox is equipped with an actuator, and the inside of the gearbox is a worm gear structure, while the inside of the corner gearbox A and corner gearbox B is an orthogonal bevel gear structure.
[0012] Preferably, the gearbox is installed on the outer right side of the device, and the corner boxes A and B are respectively installed on the front and rear sides of the partition device body. The gearbox, corner boxes A and B are all fixed on the outer welded bracket of the device.
[0013] The beneficial effects of this utility model are:
[0014] 1. The partition device of this utility model adopts the coordinated operation of the actuator and the gearbox, which significantly improves the output torque performance and drives the linkage structure to rotate, thereby realizing the full-angle opening and closing positioning function of the left and right sealing plates. The partition device can implement precise opening angle adjustment according to the geometric characteristics and size parameters of the object being hoisted, effectively preventing the unexpected release of radioactive media. Under hoisting operation conditions, based on the inherent reverse self-locking characteristics of the gearbox, the left and right sealing plates can achieve reliable motion locking, completely eliminating the influence of reaction force on the actuator. This technical feature not only ensures the operational stability of the actuator, but also improves the service life of key components.
[0015] 2. The left and right sealing plates of the partition device of this utility model are equipped with sealing rings around their perimeter. At the same time, the joint between the left and right sealing plates adopts a 45° bevel contact, which not only facilitates the sequential operation of the switch, but also increases the fit of the sealing surface and reduces the impact on the closing surface. In the closed state, it can effectively control the leakage of radioactive gas.
[0016] 3. The switch drive structure of the partition device of this utility model is designed on both sides through the linkage assembly, and the left sealing plate and the right sealing plate open and close synchronously, so as to maximize the vertical space and realize the maximum through hoisting. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a front view structural schematic diagram of the partition device of this utility model.
[0019] Figure 2 This is a top view of the partition device of this utility model.
[0020] Figure 3 This is a schematic diagram of the closed state of the partition device of this utility model.
[0021] Figure 4 This is a schematic diagram of the fully open state of the partition device of this utility model.
[0022] Figure 5 This is a schematic diagram of the through-type hoisting operation of the partition device of this utility model.
[0023] In the diagram, 1. Left sealing plate, 2. Rotating shaft, 3. Left connecting rod I, 4. Rocker arm A, 5. Left connecting rod II, 6. Rocker arm, 7. Spindle, 8. Right connecting rod II, 9. Actuator, 10. Rocker arm B, 11. Right connecting rod I, 12. Right sealing plate, 13. Pin, 14. Angle box A, 15. Drive shaft, 16. Angle box B, 17. Drive shaft, 18. Gearbox, 20. Fastener, 21. Pipe. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] A partition device for handling nuclear waste in nuclear power plants, hereinafter referred to as the partition device, has the following shape: Figure 1 , 2As shown, the structure is a cube, including: a left sealing plate 1 and a right sealing plate 12, which are respectively connected to a rotating shaft 2. The rotating shaft 2 is hinged and fixed to the body of the partition device. The left sealing plate 1 and the right sealing plate 12 rotate through the rotating shaft 2. The left sealing plate 1 is connected to the left connecting rod I3 through a pin 13, and the right sealing plate 12 is connected to the right connecting rod I11 through another pin 13. Rocker arms A4 and B10 are respectively mounted on the body of the partition device through corresponding pins 13. The left connecting rod I3 and the rocker arm A4 are connected through the pin 13. The right connecting rod I11 is connected to the rocker arm B10 via another pin 13; the left connecting rod II5 is connected to the rocker arm A4 via pin 13, and the other end of the left connecting rod II5 is connected to the rocker arm 6 via pin 13; the right connecting rod II8 is connected to the rocker arm B10 via pin 13, and the other end of the right connecting rod II8 is connected to the rocker arm 6 via pin 13; the rocker arm 6 is mounted on the partition device body via a spindle 7; the reduction gearbox 18 is mounted on the outer surface of the right side of the device, and the corner gearboxes A14 and B16 are respectively mounted on the partition... The front and rear sides of the cutting device body, the reduction gearbox 18, angle gearbox A14, and angle gearbox B16 are all fixed to the outer welded bracket of the device; the angle gearbox A14 is connected to the rocker arm 6 through the spindle 7, one end of the spindle 7 is connected to the bevel gear of the angle gearbox A14, and the other end of the spindle 7 is connected to the rocker arm 6; the actuator 9 is installed on the reduction gearbox 18, the reduction gearbox 18 has a worm gear structure inside, and the angle gearbox A14 and angle gearbox B16 have an orthogonal bevel gear structure inside; the driven gear inside the angle gearbox B16 is coaxial with the drive shaft 17 of the reduction gearbox 18. The connection is as follows: the drive gear inside the corner box B16 drives the vertical transmission shaft 15 to rotate, and the transmission shaft 15 is coaxially connected with the driven gear inside the corner box A14. The drive gear inside the corner box A14 drives the vertical spindle 7 to rotate, and the rotation of the spindle 7 drives the rocker arm 6 to rotate. The sealing ring has radiation resistance and is installed inside the left sealing plate 1 and the right sealing plate 12. The contact surfaces of the left sealing plate 1 and the right sealing plate 12 are inclined at 45 degrees. The upper and lower ends of the device are connected to the pipe 21 by fasteners 20.
[0026] The working principle of the partition device is as follows:
[0027] The closed state of the partition device is as follows Figure 3 As shown, the isolation device is installed on a vertical pipe. The lower part is under positive pressure and contains radioactive gas, while the upper part is a pipe with near atmospheric pressure. The isolation device controls gas leakage by opening and closing the left sealing plate 1 and the right sealing plate 12. The sealing ring, compressed by the isolation device body, achieves a sealing function. Figure 4As shown, the opening process of the isolation device is as follows: Actuator 9 drives the reduction gearbox 18 to rotate. The reduction gearbox 18 drives the corner boxes B16 on both sides through the drive shaft 17. The corner boxes B16 drive the corner box A14 through the transmission shaft 15. The corner box A14 drives the rocker arm 6 to rotate through the spindle 7. The rotation of the rocker arm 6 drives the left connecting rod II5 and the right connecting rod II8 to rotate, thereby driving the rocker arm A4 and the rocker arm B10 to rotate. The rotation of the rocker arm A4 and the rocker arm B10 drives the left connecting rod I3 and the right connecting rod I11 to rotate, thereby realizing the rotation of the left sealing plate 1 and the right sealing plate 12 around the rotating shaft 2 to open. The closing process of the isolation device is the reverse. The hoisting operation state is as follows: Figure 5 As shown, the isolation device uses a self-locking structure of the gearbox 18. According to the size of the object being hoisted, the actuator 9 adjusts the precise opening of the left sealing plate 1 and the right sealing plate 12. For example, when the object is large, it is in the "fully open state". The device has the comprehensive advantages of precise angle adjustment, dynamic sealing guarantee and optimized working space. At the same time, each component has high reliability, long service life and has the characteristics of shock resistance and radiation resistance. It can effectively control the leakage of radioactive materials and reduce the impact of exhaust gas on the environment. It is also suitable for the safe hoisting of irregularly shaped objects in nuclear facilities.
[0028] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.
Claims
1. A partition device for nuclear waste treatment of nuclear power plants, comprising a left sealing plate (1), a right sealing plate (12), characterized in that, The left sealing plate (1) and the right sealing plate (12) are respectively connected to the rotating shaft (2). The rotating shaft (2) is hinged and fixed on the body of the partition device. The left sealing plate (1) is connected to the left connecting rod I (3) through the pin (13). The right sealing plate (12) is connected to the right connecting rod I (11) through another pin (13). The left connecting rod I (3) is connected to the rocker arm A (4) by a pin (13), and the right connecting rod I (11) is connected to the rocker arm B (10) by another pin (13). The rocker arm A (4) and the rocker arm B (10) are respectively installed on the body of the partition device by corresponding pins (13). The rocker arm A (4) is connected to the left connecting rod II (5) via a pin (13), and the other end of the left connecting rod II (5) is connected to the rocker arm (6) via a pin (13). The rocker arm B (10) is connected to the right connecting rod II (8) via a pin (13), and the other end of the right connecting rod II (8) is connected to the rocker arm (6) via a pin (13). The rocker arm (6) is mounted on the body of the partition device via a spindle (7). One end of the spindle (7) is connected to the rocker arm (6), and the other end of the spindle (7) is connected to the bevel gear of the angle box A (14). The angle box A (14) is connected to the rocker arm (6) through the spindle (7). The driving gear inside the angle box A (14) is coaxially connected to the spindle (7), and the driven gear inside the angle box A (14) is coaxially connected to the transmission shaft (15). The transmission shaft (15) is coaxially connected to the driving gear inside the angle box B (16), and the driven gear inside the angle box B (16) is coaxially connected to the drive shaft (17) of the reduction gearbox (18). The upper and lower ends of the partition device body are connected to the pipe (21) by fasteners (20).
2. The isolation device for handling nuclear waste in a nuclear power plant according to claim 1, characterized in that, The contact surfaces of the left sealing plate (1) and the right sealing plate (12) are inclined at 45 degrees, and sealing rings are installed inside the left sealing plate (1) and the right sealing plate (12).
3. A separation device for handling nuclear waste in a nuclear power plant according to claim 1, characterized in that, The gearbox (18) is equipped with an actuator (9), and the gearbox (18) has a worm gear structure inside, while the corner gearbox A (14) and corner gearbox B (16) have an orthogonal bevel gear structure inside.
4. A separation device for handling nuclear waste in a nuclear power plant according to claim 1, characterized in that, The gearbox (18) is installed on the outer surface of the right side of the device. The corner boxes A (14) and B (16) are respectively installed on the front and rear sides of the body of the partition device. The gearbox (18), corner boxes A (14) and B (16) are all fixed on the outer welding bracket of the device.