Lifting device for disassembling and assembling intermediate heat exchanger of sodium-cooled fast reactor

Abstract

The utility model particularly relates to a lifting device for disassembling and assembling a sodium-cooled fast reactor intermediate heat exchanger. The lifting device comprises a silo (2), a top cover (18), a flange (19), a driving mechanism and a lifting mechanism, the top of the silo (2) is hermetically connected with a top cover (18) through bolts; a flange (19) is hermetically welded at the bottom of the silo (2); a driving mechanism and a lifting lug (1) are arranged outside the silo (2); a lifting mechanism is mounted in the silo (2); the driving mechanism penetrates through the silo (2) and is connected with the lifting mechanism to drive the lifting mechanism to lift; and the driving mechanism is rotationally and hermetically connected with the silo (2). The lifting device for disassembling and assembling the intermediate heat exchanger of the sodium-cooled fast reactor is compact in structure, the circumferential diameter and the axial height are within a limited range, and meanwhile, the lifting device has the functions of sealing, lifting and bearing.

Description

Technical Field

[0001] The utility model relates to the technical field of disassembly and assembly of intermediate heat exchangers in sodium-cooled fast reactors, and particularly relates to a lifting device for disassembly and assembly of intermediate heat exchangers in sodium-cooled fast reactors. Background Art

[0002] The intermediate heat exchanger of a sodium-cooled fast reactor is filled with high-temperature and low-pressure liquid sodium. Since sodium will react with water when it comes into contact with air, it is necessary to ensure that liquid sodium does not come into contact with air under any circumstances. Due to this characteristic, the lifting device for disassembly and assembly of the intermediate heat exchanger of a sodium-cooled fast reactor needs to have sealing, lifting, and load-bearing functions at the same time. Ordinary lifting devices only have lifting and load-bearing functions and cannot meet the requirements of the lifting device for disassembly and assembly of the intermediate heat exchanger of a sodium-cooled fast reactor. In addition, due to external limiting factors such as the plant and the crane, there are certain limitations on the circumferential diameter and axial height of the lifting device for disassembly and assembly of the intermediate heat exchanger of a sodium-cooled fast reactor. Content of the Utility Model

[0003] One of the purposes of the utility model is to provide a lifting device for disassembly and assembly of an intermediate heat exchanger in a sodium-cooled fast reactor, which has sealing, lifting, and load-bearing functions at the same time.

[0004] Another purpose of the utility model is to provide a lifting device for disassembly and assembly of an intermediate heat exchanger in a sodium-cooled fast reactor, which has a compact structure and the circumferential diameter and axial height are within the limited range.

[0005] In order to achieve the above purposes, the utility model provides the following technical solutions:

[0006] A lifting device for disassembly and assembly of an intermediate heat exchanger in a sodium-cooled fast reactor includes a silo, a top cover, a flange, a driving mechanism, and a lifting mechanism; the top of the silo is bolt-sealed and connected to the top cover, and the bottom of the silo is sealed and welded to the flange; the driving mechanism and lifting lugs are installed outside the silo; the lifting mechanism is installed inside the silo; the driving mechanism passes through the silo and is connected to the lifting mechanism to drive the lifting mechanism to lift; the driving mechanism is rotationally and sealedly connected to the silo.

[0007] As one possible implementation, bolt holes are provided on the flange; lifting lugs are welded outside the silo.

[0008] As one possible implementation, the lifting lug is of a diamond structure, and a pin hole is provided in the middle of the lifting lug; the number of lifting lugs is 2, and they are mirror-symmetrically welded outside the silo.

[0009] As one possible implementation, the lifting mechanism includes a drum, a main beam, a fixed pulley, a steel wire rope, a movable pulley, an in-silo platform, and a hook; the in-silo platform is installed inside the silo, the drum and the main beam are installed on the in-silo platform, the fixed pulley is installed on the main beam, and the movable pulley is installed on the hook; the steel wire rope is wound and connected to the drum, and the steel wire rope on the drum is wound and connected to the fixed pulley and the movable pulley.

[0010] As one of the feasible ways, the number of fixed pulleys is 2, which are installed on the main beam in mirror symmetry; the number of movable pulleys is 2, which are installed on the hook in mirror symmetry; one fixed pulley and one movable pulley form a set of fixed and movable pulleys; the number of steel wire ropes on the drum is 2, which are wound and connected to the two sets of fixed and movable pulleys in mirror symmetry.

[0011] As one of the feasible ways, the drum is installed on the platform inside the silo through a bearing housing.

[0012] As one of the feasible ways, the drum is provided with a spiral rope groove, and the steel wire rope is wound in the spiral rope groove in a single layer.

[0013] As one of the feasible ways, the driving mechanism includes a transmission shaft, an external silo platform, a speed reducer, a motor and a motor control box; the external silo platform is welded and installed outside the silo, and the motor, the speed reducer and the motor control box are installed on the external silo platform; the motor control box is electrically connected to the motor; the motor is connected to the speed reducer through a belt brake coupling, and the speed reducer is connected to the transmission shaft; the transmission shaft passes through the silo and is connected to the end of the drum shaft; the transmission shaft is rotationally and hermetically connected to the silo.

[0014] As one of the feasible ways, the motor is installed on the external silo platform through a motor support.

[0015] As one of the feasible ways, the motor is an AC asynchronous motor; the speed reducer is a hard tooth surface reducer.

[0016] As one of the feasible ways, a pressure sensor is provided at the bearing housing of the drum; a lifting height control device is provided at the end of the drum shaft; a hook positioning device is provided on the hook, and a support mechanism is symmetrically provided on the hook positioning device. The hook positioning device contacts the inner wall of the silo through the support mechanism to position the hook; the lifting height control device is electrically connected to the pressure sensor, the hook positioning device and the motor control box respectively.

[0017] As one of the feasible ways, the belt brake coupling is provided with a working brake, a safety brake and a chuck; the lifting height control device is electrically connected to the working brake and the safety brake respectively; the working brake and the safety brake drive the chuck to perform braking.

[0018] The beneficial technical effects of the present utility model:

[0019] The lifting device for disassembling and assembling the intermediate heat exchanger of the sodium-cooled fast reactor of the present utility model installs an in-silo platform inside the silo, installs a lifting mechanism on the in-silo platform, installs an out-of-silo platform outside the silo, and installs a driving mechanism on the out-of-silo platform. The driving mechanism drives the lifting mechanism to lift, making the overall structure of the lifting device compact, the mechanical power transmission method reasonable, and the circumferential diameter and axial height within the limited range. The top of the silo is sealed and connected to the top cover by bolts, and the bottom of the silo is sealed and welded with a flange. The driving mechanism is rotationally and sealedly connected to the silo. The lifting device and the disassembly and assembly device are sealedly connected by flange bolts to form a sealed space, enabling the lifting device to simultaneously have the functions of sealing, lifting, and bearing, ensuring that the intermediate heat exchanger with sodium does not come into contact with air to generate a sodium-water reaction. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the lifting device for disassembling and assembling the intermediate heat exchanger of the sodium-cooled fast reactor of the present utility model;

[0021] Figure 2 It is the front view of the lifting device for disassembling and assembling the intermediate heat exchanger of the sodium-cooled fast reactor of the present utility model;

[0022] Figure 3 It is the side view of the lifting device for disassembling and assembling the intermediate heat exchanger of the sodium-cooled fast reactor of the present utility model;

[0023] Figure 4 It is the top view of the lifting device for disassembling and assembling the intermediate heat exchanger of the sodium-cooled fast reactor of the present utility model;

[0024] Figure 5 It is a partial schematic diagram of the drum;

[0025] Figure 6 It is a schematic diagram of wire rope winding;

[0026] Figure 7 It is a schematic diagram of the connection between the transmission shaft and the silo.

[0027] In the figure, 1. lifting lug; 2. silo; 3. drum; 4. main beam; 5. fixed pulley; 6. wire rope; 7. movable pulley; 8. sealing device; 9. transmission shaft; 10. out-of-silo platform; 11. reducer; 12. brake coupling; 13. motor; 14. motor control box; 15. in-silo platform; 16. hook positioning device; 17. hook; 18. top cover; 19. flange. Detailed Embodiment

[0028] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper end", "lower end", "above", "below", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0030] See Figure 1-7 , this embodiment provides a lifting device for disassembling and assembling an intermediate heat exchanger of a sodium-cooled fast reactor, which includes a silo 2, a top cover 18, a flange 19, a driving mechanism and a lifting mechanism; the top of the silo 2 is bolt-sealed and connected to the top cover 18, and the bottom of the silo 2 is hermetically welded to the flange 19; the driving mechanism and a lifting lug 1 are installed outside the silo 2; the lifting mechanism is installed inside the silo 2; the driving mechanism passes through the silo 2 and is connected to the lifting mechanism to drive the lifting mechanism to lift; the driving mechanism is rotationally and hermetically connected to the silo 2.

[0031] The lifting lug 1 is used for the overall lifting of the lifting device. The silo 2 is the main carrier of the lifting device and has the functions of carrying the components of the lifting device and sealing.

[0032] In this embodiment, as one of the feasible ways, bolt holes are provided on the flange 19; the lifting lug 1 is welded outside the silo 2.

[0033] In this embodiment, as one of the feasible ways, the lifting lug 1 is of a diamond structure, and a pin hole is provided in the middle of the lifting lug 1; the number of the lifting lugs 1 is 2, and they are symmetrically welded outside the silo 2 in a mirror image.

[0034] In this embodiment, as one of the feasible ways, the lifting mechanism includes a drum 3, a main beam 4, a fixed pulley 5, a steel wire rope 6, a movable pulley 7, an in-silo platform 15 and a hook 17; the in-silo platform 15 is installed inside the silo 2, the drum 3 and the main beam 4 are installed on the in-silo platform 15, the fixed pulley 5 is installed on the main beam 4, and the movable pulley 7 is installed on the hook 17; the steel wire rope 6 is wound and connected to the drum 3, and the steel wire rope on the drum 3 is wound and connected to the fixed pulley 5 and the movable pulley 7.

[0035] The fixed pulley 5 can change the direction of the force and reduce the movement friction, so as to achieve the purpose of bearing; the movable pulley 7 can change its own position, so as to achieve the effect of displacement. The in-silo platform 15 has the functions of equipment support and structural strength support for the silo 2.

[0036] In this embodiment, as one of the achievable ways, the number of fixed pulleys 5 is 2, which are installed on the main beam 4 in mirror symmetry; the number of movable pulleys 7 is 2, which are installed on the hook 17 in mirror symmetry; one fixed pulley 5 and one movable pulley 7 form a set of fixed pulley 5 and movable pulley 7; the number of steel ropes 6 on the drum 3 is 2, which are wound and connected to the two sets of fixed pulleys 5 and movable pulleys 7 in mirror symmetry, so as to achieve a redundant function. After one steel rope 6 fails, the other steel rope 6 can continue to work independently, thus ensuring the safety function of the lifting state.

[0037] In this embodiment, as one of the achievable ways, the drum 3 is installed on the platform 15 in the silo through a bearing seat.

[0038] In this embodiment, as one of the achievable ways, the drum 3 is provided with a spiral rope groove, and the steel rope 6 is wound around the spiral rope groove in a single layer; the steel rope 6 is a stainless steel wire rope.

[0039] In this embodiment, as one of the achievable ways, the driving mechanism includes a transmission shaft 9, an external platform 10 of the silo, a speed reducer 11, a motor 13 and a motor control box 14; the external platform 10 of the silo is welded and installed outside the silo 2, and the motor 13, the speed reducer 11 and the motor control box 14 are installed on the external platform 10 of the silo; the motor control box 14 is electrically connected to the motor 13, and the motor control box 14 controls the rotation direction and speed of the motor 13. The rotation direction includes forward rotation and reverse rotation, so as to complete the actions of rising, falling, fast and slow of the lifting mechanism; the motor 13 is connected to the speed reducer 11 through a belt brake coupling 12, and the speed reducer 11 is connected to the transmission shaft 9; the transmission shaft 9 passes through the silo 2 and is connected to the shaft end of the drum 3; the transmission shaft 9 is rotationally and sealingly connected to the silo 2.

[0040] The output power of the motor 13 is transmitted to the speed reducer 11 through the belt brake coupling 12, and after being decelerated by the speed reducer 11, it is transmitted to the drum 3 through the transmission shaft 9, driving the drum 3 to rotate. The rotation of the drum 3 drives the steel rope 6 to rise and fall, and the rise and fall of the steel rope 6 drives the movable pulley 7 to rise and fall, and the rise and fall of the movable pulley 7 drives the hook 17 to rise and fall.

[0041] In this embodiment, as one of the achievable ways, the motor 13 is installed on the external platform 10 of the silo through a motor support.

[0042] In this embodiment, as one of the achievable ways, the motor 13 is an AC asynchronous motor; the speed reducer 11 is a hard tooth surface reducer.

[0043] In this embodiment, as one of the achievable ways, the transmission shaft 9 and the silo 2 are rotationally and sealingly connected through a sealing device 8.

[0044] In this embodiment, as one of the feasible ways, a pressure sensor is provided at the bearing seat of the drum 3 for collecting the lifting load signal; a lifting height control device is provided at the shaft end of the drum 3 for controlling the lifting height; a hook positioning device is provided on the hook 17, and support mechanisms are symmetrically provided on the hook positioning device. The hook positioning device contacts the inner wall of the silo 2 through the support mechanisms to position the position of the hook 17; the lifting height control device is electrically connected to the pressure sensor, the hook positioning device, and the motor control box respectively.

[0045] The lifting height control device generates a lifting height control signal according to the lifting load signal; the hook positioning device positions the position of the hook 17 according to the lifting height control signal; the motor control box 14 controls the rotation direction and speed of the motor 13 according to the lifting height control signal.

[0046] In this embodiment, as one of the feasible ways, the belt brake coupling 12 is provided with a working brake, a safety brake, and a chuck; the lifting height control device is electrically connected to the working brake and the safety brake respectively; the working brake and the safety brake drive the chuck to perform a braking hold, thereby completing the deceleration or stop of the lifting device.

[0047] The lifting height control device generates a braking signal according to the lifting load signal; the working brake or the safety brake drives the chuck to perform a braking hold according to the braking signal.

[0048] When using the lifting device for disassembling and assembling the intermediate heat exchanger of the sodium-cooled fast reactor to lift the intermediate heat exchanger of the sodium-cooled fast reactor, the following steps are included:

[0049] The lifting device for disassembling and assembling the intermediate heat exchanger of the sodium-cooled fast reactor is hermetically connected to the disassembling and assembling device of the intermediate heat exchanger of the sodium-cooled fast reactor through the flange 19 bolts to form a sealed space;

[0050] The hook 17 grabs the intermediate heat exchanger of the sodium-cooled fast reactor;

[0051] The output power of the motor 13 is transmitted to the reducer 11 through the belt brake coupling 12, and after being decelerated by the reducer 11, it is transmitted to the drum 3 through the transmission shaft 9, driving the drum 3 to rotate; the rotation of the drum 3 drives the lifting of the steel wire rope 6, the lifting of the steel wire rope 6 drives the lifting of the movable pulley 7, the lifting of the movable pulley 7 drives the lifting of the hook 17, and the lifting of the hook 17 drives the lifting of the intermediate heat exchanger of the sodium-cooled fast reactor;

[0052] The pressure sensor at the bearing seat of the drum 3 outputs a lifting load signal; the lifting height control device generates a lifting height control signal according to the lifting load signal; the hook positioning device positions the position of the hook 17 according to the lifting height control signal; the motor control box 14 controls the rotation direction and speed of the motor 13 according to the lifting height control signal;

[0053] The lifting height control device generates a braking signal; the working brake or the safety brake drives the chuck to perform a braking hold according to the braking signal.

[0054] The above-described embodiments merely represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A lifting device for disassembling and assembling an intermediate heat exchanger of a sodium-cooled fast reactor, characterized in that, It includes a silo (2), a top cover (18), a flange (19), a driving mechanism and a lifting mechanism; the top cover (18) is bolt-sealed to the top of the silo (2), and the flange (19) is hermetically welded to the bottom of the silo (2); the driving mechanism and lifting lugs (1) are installed outside the silo (2); the lifting mechanism is installed inside the silo (2); the driving mechanism passes through the silo (2) and is connected to the lifting mechanism to drive the lifting mechanism to move up and down; the driving mechanism is rotationally and hermetically connected to the silo (2).

2. The lifting device for disassembling and assembling the intermediate heat exchanger of the sodium-cooled fast reactor according to claim 1, wherein The lifting mechanism includes a winding drum (3), a main beam (4), a fixed pulley (5), a steel wire rope (6), a movable pulley (7), an in-silo platform (15) and a hook (17); the in-silo platform (15) is installed inside the silo (2), the winding drum (3) and the main beam (4) are installed on the in-silo platform (15), the fixed pulley (5) is installed on the main beam (4), and the movable pulley (7) is installed on the hook (17); the steel wire rope (6) is wound and connected to the winding drum (3), and the steel wire rope on the winding drum (3) is wound and connected to the fixed pulley (5) and the movable pulley (7).

3. The lifting device for disassembling and assembling the intermediate heat exchanger of the sodium-cooled fast reactor according to claim 2, wherein, The number of fixed pulleys (5) is 2, which are installed on the main beam (4) in mirror symmetry; the number of movable pulleys (7) is 2, which are installed on the hook (17) in mirror symmetry; one fixed pulley (5) and one movable pulley (7) form a set of fixed pulley (5) and movable pulley (7); the number of steel wire ropes (6) on the winding drum (3) is 2, which are wound and connected to two sets of fixed pulleys (5) and movable pulleys (7) in mirror symmetry.

4. The lifting device for disassembling and assembling the intermediate heat exchanger of the sodium-cooled fast reactor according to claim 2, wherein, The winding drum (3) is provided with a spiral rope groove, and the steel wire rope (6) is wound in the spiral rope groove in a single layer.

5. The lifting device for disassembling and assembling the intermediate heat exchanger of the sodium-cooled fast reactor according to claim 2, characterized in that, The winding drum (3) is installed on the in-silo platform (15) through a bearing seat.

6. The lifting device for disassembling and assembling the intermediate heat exchanger of the sodium-cooled fast reactor according to claim 2, characterized in that, The driving mechanism includes a transmission shaft (9), an out-silo platform (10), a speed reducer (11), a motor (13) and a motor control box (14); the out-silo platform (10) is welded and installed outside the silo (2), and the motor (13), the speed reducer (11) and the motor control box (14) are installed on the out-silo platform (10); the motor control box (14) is electrically connected to the motor (13); the motor (13) is connected to the speed reducer (11) through a belt brake coupling (12), and the speed reducer (11) is connected to the transmission shaft (9); the transmission shaft (9) passes through the silo (2) and is connected to the shaft end of the winding drum (3); the transmission shaft (9) is rotationally and hermetically connected to the silo (2).

7. The lifting device for disassembling and assembling the intermediate heat exchanger of the sodium-cooled fast reactor according to claim 6, characterized in that, A pressure sensor is provided at the bearing seat of the winding drum (3); a lifting height control device is provided at the shaft end of the winding drum (3); a hook positioning device is provided on the hook (17), and a support mechanism is symmetrically provided on the hook positioning device. The hook positioning device contacts the inner wall of the silo (2) through the support mechanism to position the hook (17); the lifting height control device is electrically connected to the pressure sensor, the hook positioning device and the motor control box respectively.

8. The lifting device for disassembling and assembling the intermediate heat exchanger of the sodium-cooled fast reactor according to claim 7, characterized in that, The belt brake coupling (12) is provided with a working brake, a safety brake and a chuck; the lifting height control device is electrically connected to the working brake and the safety brake respectively; the working brake and the safety brake drive the chuck to perform a holding brake.

9. The lifting device for disassembling and assembling the intermediate heat exchanger of the sodium-cooled fast reactor according to claim 6, characterized in that, The motor (13) is an AC asynchronous motor; the speed reducer (11) is a hard tooth surface reducer; the motor (13) is installed on the out-silo platform (10) through a motor support.

10. The lifting device for disassembling and assembling the intermediate heat exchanger of the sodium-cooled fast reactor according to claim 1, wherein, The flange (19) is provided with bolt holes; the lifting lugs (1) are welded outside the silo (2); the lifting lugs (1) are in a diamond structure, and a pin hole is provided in the middle of the lifting lugs (1); the number of the lifting lugs (1) is two, and they are welded outside the silo (2) in a mirror-symmetrical manner.

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