Bridge emergency cooling and ventilation device for nuclear power

Abstract

The utility model relates to cooling and ventilation device technical field, and disclose a kind of bridge emergency cooling and ventilation device for nuclear power, solve the existing bridge for nuclear power without emergency cooling and ventilation capacity, under the condition of accident, cable insulation will be accelerated aging even burning due to high temperature accumulation, cause short circuit, signal interruption, and further threaten nuclear safety system operation problem, it includes bridge main body, the middle part of the top of bridge main body is fixedly installed with guard plate, the top of guard plate is fixedly installed with standby power supply, the both sides of the top of bridge main body are fixedly installed with gas storage tank by support leg, the top of gas storage tank is fixedly installed with gas injection nozzle, the bottom of gas storage tank is fixedly installed with gas outlet pipe by gas outlet, the upper surface of bridge main body is provided with two round holes, two gas outlet pipes are inserted in the inside of two round holes;The bridge for nuclear power has emergency cooling and ventilation capacity, can be forced to ventilate and radiate heat under the condition of accident, and further guarantee nuclear safety system operation.

Description

Technical Field

[0001] This utility model belongs to the technical field of cooling and ventilation devices, specifically an emergency cooling and ventilation device for cable trays used in nuclear power plants. Background Technology

[0002] Nuclear power cable trays are cable support and protection systems specifically designed for nuclear power plants. They are manufactured using special materials (such as stainless steel, nickel-based alloys, or ceramic composites) that are resistant to high temperatures, radiation, and corrosion. They feature a high-strength sealed structure and redundant seismic design to cope with the high radiation, high temperature, high pressure, and potential accident conditions within the nuclear reactor building. Their core function is to standardize the laying of power, control, and instrumentation cables, ensuring signal transmission stability while preventing safety hazards caused by mechanical damage, fire, or radiation aging. Applications cover the nuclear island (power distribution for key equipment such as reactor pressure vessels, main pumps, and steam generators), the conventional island (steam turbines and generator systems), and auxiliary facilities (nuclear fuel processing and waste storage systems). They are a crucial infrastructure for ensuring the safe operation of nuclear power plants and achieving a "defense-in-depth" system.

[0003] Existing cable trays for nuclear power plants lack emergency cooling and ventilation capabilities. In accident conditions (such as fire or loss of water accidents), the accumulation of high temperatures can cause the cable insulation to age rapidly or even burn, leading to short circuits, signal interruptions, and ultimately threatening the operation of nuclear safety systems. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides an emergency cooling and ventilation device for cable trays used in nuclear power plants. It effectively solves the problem that existing cable trays used in nuclear power plants do not have emergency cooling and ventilation capabilities, and that under accident conditions, high temperature accumulation will cause the cable insulation to age rapidly or even burn, leading to short circuits, signal interruptions, and thus threatening the operation of the nuclear safety system.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an emergency cooling and ventilation device for cable trays used in nuclear power plants, comprising a cable tray body, a protective plate fixedly installed at the middle of the top of the cable tray body, a backup power supply fixedly installed at the top of the protective plate, gas storage tanks fixedly installed on both sides of the top of the cable tray body via support legs, gas injection nozzles fixedly installed at the top of each gas storage tank, and gas outlet pipes fixedly installed at the bottom of each gas storage tank via gas outlet hoppers. Two round holes are opened on the upper surface of the cable tray body, and two gas outlet pipes are inserted into the two round holes.

[0006] Both venting hoppers are equipped with sealing blocks inside. The surfaces of the two sealing blocks are fixedly connected to the two venting hoppers via external threads. A servo motor is fixedly installed on the rear side of the top of the cable tray body via a support base. The output end of the servo motor is equipped with a transmission component, which is connected to the two sealing blocks. When the servo motor is running, it drives the two sealing blocks to move outward and release air through the transmission component. A temperature sensor is fixedly installed on the inner top of the cable tray body.

[0007] Preferably, the transmission assembly includes a driving bevel gear fixedly installed at the output end of the servo motor, a driven bevel gear meshing with one side of the surface of the driving bevel gear, a shaft fixedly installed in the middle of the driven bevel gear, the surface of the shaft being rotatably connected to the top of the bridge frame body through two bushings, transmission gears being fixedly installed at both ends of the shaft, and the sides of the two transmission gears that are far apart from each other being rotatably connected to the top of the bridge frame body through positioning seats.

[0008] Preferably, the circumferential surfaces of the transmission gears are all meshed with external gear rings, and sleeves are fixedly installed inside the external gear rings. The surfaces of the sleeves are rotatably connected to the top of the bridge frame body through shaft seats. Transmission rods are inserted inside the sleeves, and the ends of the two transmission rods that are far apart from each other are fixedly connected to the sealing block through connecting discs.

[0009] Preferably, sealing rings are fixedly installed on the sides of the two connecting discs that are close to each other, and sealing grooves are opened on the sides of the two air outlets that are close to each other, with the two sealing rings installed inside the two sealing grooves.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: In the event of an accident, when the heat inside the main body of the cable tray is too high, the temperature sensor will transmit the monitoring data to the external control panel. The operator can start the servo motor through the control panel to drive the active bevel gear to rotate. The active bevel gear drives the shaft to rotate inside the two bushings through the driven bevel gear. When the shaft rotates, it drives the two external gear rings to rotate through the two transmission gears. Both external gear rings drive the sleeves to rotate inside the bearing. When the two sleeves rotate, they drive the connecting disc to rotate through the transmission rod. When the connecting disc rotates, it drives the sealing block to rotate and move outward through the threaded engagement.

[0011] When the sealing block moves outward, it drives the transmission rod to move along the inside of the sleeve, so that the transmission rod can rotate and translate synchronously. This allows the nitrogen inside the gas storage tank to be sprayed into the interior of the cable tray body through the gas outlet bucket and gas outlet pipe for forced ventilation and heat dissipation. This gives the cable tray used in nuclear power plants emergency cooling and ventilation capabilities, which can force ventilation and heat dissipation under accident conditions, thereby ensuring the operation of the nuclear safety system. Attached Figure Description

[0012] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0013] In the attached diagram:

[0014] Figure 1 This is a schematic diagram of the structure of the emergency cooling and ventilation device for nuclear power cable trays according to this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the protective plate in this utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of the emergency cooling and ventilation device for nuclear power plants using cable trays according to this utility model;

[0017] Figure 4 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0018] Figure 5 This utility model Figure 3 Enlarged structural diagram at point B;

[0019] In the diagram: 1. Cable tray body; 2. Protective plate; 3. Backup power supply; 4. Air tank; 5. Air inlet; 6. Support leg; 7. Air outlet hopper; 8. Air outlet pipe; 9. Round hole; 10. Support base; 11. Servo motor; 12. Sealing block; 13. External thread; 14. Sealing ring; 15. Sealing groove; 16. Driving bevel gear; 17. Driven bevel gear; 18. Shaft; 19. Bushing; 20. Transmission gear; 21. Positioning seat; 22. External gear ring; 23. Sleeve; 24. Shaft seat; 25. Transmission rod; 26. Connecting plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] Depend on Figures 1 to 5The present invention includes a cable tray body 1, a protective plate 2 fixedly installed at the middle of the top of the cable tray body 1, a backup power supply 3 fixedly installed at the top of the protective plate 2, the backup power supply 3 is used to continuously supply power in the event of a power outage during an accident, and gas storage tanks 4 are fixedly installed on both sides of the top of the cable tray body 1 through support legs 6. The gas storage tanks 4 are compressed and stored with nitrogen gas inside, and the nitrogen gas also has an inert explosion suppression function, which can prevent secondary explosions caused by cable fires. Gas injection nozzles 5 are fixedly installed on the top of the gas storage tanks 4, and gas outlet pipes 8 are fixedly installed on the bottom of the gas storage tanks 4 through gas outlet hoppers 7. Two round holes 9 are opened on the upper surface of the cable tray body 1, and two gas outlet pipes 8 are inserted into the two round holes 9. The two gas outlet pipes 8 penetrate downward through the two round holes 9 and enter the interior of the cable tray body 1.

[0022] Both air vents 7 have sealing blocks 12 inside. The surfaces of the two sealing blocks 12 are threadedly connected to the two air vents 7 via external threads 13. A servo motor 11 is fixedly installed on the rear side of the top of the bridge frame body 1 via a support base 10. The output end of the servo motor 11 is equipped with a transmission component, which is connected to the two sealing blocks 12. When the servo motor 11 is running, it drives the two sealing blocks 12 to move outward and release air through the transmission component. A temperature sensor is fixedly installed on the inner top of the bridge frame body 1. The temperature sensor and the servo motor 11 are both connected to the external control panel via a wireless transmission module.

[0023] In the event of an accident, if the heat inside the cable tray body 1 becomes too high, the temperature sensor will transmit the monitoring data to the external control panel. The operator will then activate the servo motor 11 via the control panel to drive the transmission assembly. As the transmission assembly operates, it causes the sealing block 12 to rotate and move outward through the threaded engagement, thereby forcing the nitrogen gas inside the gas storage tank 4 to be injected into the interior of the cable tray body 1 through the gas outlet hopper 7 and the gas outlet pipe 8 for forced ventilation and heat dissipation. This enables the nuclear power plant cable tray to have emergency cooling and ventilation capabilities, allowing for forced ventilation and heat dissipation in the event of an accident, thus ensuring the operation of the nuclear safety system.

[0024] The transmission assembly includes a drive bevel gear 16 fixedly mounted on the output end of the servo motor 11. A driven bevel gear 17 is meshed on one side of the surface of the drive bevel gear 16. A shaft 18 is fixedly mounted in the middle of the driven bevel gear 17. The surface of the shaft 18 is rotatably connected to the top of the bridge frame body 1 through two bushings 19. Both ends of the shaft 18 are fixedly mounted with transmission gears 20. The sides of the two transmission gears 20 that are far apart from each other are rotatably connected to the top of the bridge frame body 1 through positioning seats 21.

[0025] The circumferential surfaces of the transmission gears 20 are all meshed with external gear rings 22. The interior of each external gear ring 22 is fixedly installed with a sleeve 23. The surface of each sleeve 23 is rotatably connected to the top of the bridge frame body 1 through a bearing seat 24. Each sleeve 23 is inserted with a transmission rod 25. The ends of the two transmission rods 25 that are far apart from each other are fixedly connected to the sealing block 12 through a connecting plate 26.

[0026] Servo motor 11 drives active bevel gear 16 to rotate. Active bevel gear 16 drives shaft 18 to rotate inside two bushings 19 through driven bevel gear 17. When shaft 18 rotates, it drives two external gear rings 22 to rotate through two transmission gears 20. Both external gear rings 22 drive sleeves 23 to rotate inside bearing 24. When both sleeves 23 rotate, they drive connecting disc 26 to rotate through transmission rod 25. When connecting disc 26 rotates, it drives sealing block 12 to rotate outward through threaded engagement.

[0027] A sealing ring 14 is fixedly installed on the side of each of the two connecting plates 26 that are close to each other, and a sealing groove 15 is opened on the side of each of the two air outlet 7 that are close to each other. The two sealing rings 14 are pressed against the inside of the two sealing grooves 15. The cooperation between the sealing rings 14 and the sealing grooves 15 can increase the sealing effect and prevent the gas inside the gas storage tank 4 from leaking out.

Claims

1. An emergency cooling ventilation device for a bridge main body (1) for nuclear power, characterized in that: A protective plate (2) is fixedly installed in the middle of the top of the cable tray body (1). A backup power supply (3) is fixedly installed on the top of the protective plate (2). Gas tanks (4) are fixedly installed on both sides of the top of the cable tray body (1) through support legs (6). Gas nozzles (5) are fixedly installed on the top of the gas tanks (4). Gas pipes (8) are fixedly installed on the bottom of the gas tanks (4) through gas outlet hoppers (7). Two round holes (9) are opened on the upper surface of the cable tray body (1). Two gas pipes (8) are inserted into the two round holes (9). The interior of each of the two air vents (7) is provided with a sealing block (12). The surfaces of the two sealing blocks (12) are fixedly connected to the two air vents (7) by external threads (13). A servo motor (11) is fixedly installed on the rear side of the top of the bridge frame body (1) by a support base (10). The output end of the servo motor (11) is provided with a transmission component. The transmission component is connected to the two sealing blocks (12) by transmission. When the servo motor (11) is running, it drives the two sealing blocks (12) to move outward to release air through the transmission component. A temperature sensor is fixedly installed on the inner top of the bridge frame body (1).

2. The emergency cooling and ventilation device for nuclear power bridge according to claim 1, characterized in that: The transmission assembly includes an active bevel gear (16) fixedly installed at the output end of the servo motor (11). A driven bevel gear (17) is meshed on one side of the surface of the active bevel gear (16). A shaft (18) is fixedly installed in the middle of the driven bevel gear (17). The surface of the shaft (18) is rotatably connected to the top of the bridge frame body (1) through two bushings (19). Both ends of the shaft (18) are fixedly installed with transmission gears (20). The sides of the two transmission gears (20) that are far apart from each other are rotatably connected to the top of the bridge frame body (1) through a positioning seat (21).

3. The emergency cooling and ventilation device for nuclear power bridge according to claim 2, characterized in that: The circumferential surfaces of the transmission gears (20) are all meshed with external gear rings (22), and sleeves (23) are fixedly installed inside the external gear rings (22). The surfaces of the sleeves (23) are rotatably connected to the top of the bridge frame body (1) through the bearing seat (24). Transmission rods (25) are inserted inside the sleeves (23). The ends of the two transmission rods (25) that are far apart from each other are fixedly connected to the sealing block (12) through the connecting plate (26).

4. The emergency cooling and ventilation device for nuclear power bridge according to claim 3, characterized in that: A sealing ring (14) is fixedly installed on the side of each of the two connecting discs (26) that are close to each other, and a sealing groove (15) is opened on the side of each of the two air outlets (7) that are close to each other. The two sealing rings (14) are installed inside the two sealing grooves (15).

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