Maintenance hoisting device for nuclear power air conditioning unit

Abstract

The invention relates to the technical field of hoisting devices, and discloses a nuclear power air conditioning unit maintenance hoisting device which comprises a base, a plurality of locking universal wheels are evenly and fixedly installed at the bottom of the base, a hydraulic telescopic rod is fixedly installed on the upper surface of the base, and a cantilever is fixedly installed at the telescopic end of the hydraulic telescopic rod. The cantilever is of a hollow structure. When an air conditioning unit component is hoisted and installed, as a certain inclination angle exists between the air conditioning unit component and the installation position, one or two electromagnets can be selectively switched on according to needs, so that one or two first friction discs are in contact with second friction discs; therefore, the gravity center of the air conditioning unit component can be adjusted according to the length of the steel wire rope, namely, the installation angle of the air conditioning unit component can be adjusted, the air conditioning unit component can be conveniently installed, and the overhaul efficiency of the air conditioning unit is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting devices, and particularly to a hoisting device for overhauling nuclear power air conditioning units. Background Art

[0002] The equipment of the nuclear power HVAC system is a key equipment to ensure the normal operation of the nuclear island and the safety of the working environment of the staff, and is one of the main auxiliary equipment of the nuclear power plant. Its unit adjusts and controls parameters such as air temperature, pressure, humidity, cleanliness and ventilation frequency to meet the environmental requirements for equipment operation and long-term stay of personnel.

[0003] The existing hoisting device for overhauling nuclear power air conditioning units (publication number: CN219363011U) has at least the following drawbacks: when hoisting and installing the components of the air conditioning unit, there is a certain inclination angle between the components of the air conditioning unit and the installation position, which makes it difficult to install the components of the air conditioning unit in place and affects the efficiency of overhauling the air conditioning unit. Summary of the Invention

[0004] The purpose of the present invention is to solve the drawbacks existing in the prior art, and to provide a hoisting device for overhauling nuclear power air conditioning units.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A hoisting device for overhauling nuclear power air conditioning units includes a base. A plurality of locking universal wheels are evenly and fixedly installed at the bottom of the base. A hydraulic telescopic rod is fixedly installed on the upper surface of the base. The telescopic end of the hydraulic telescopic rod is fixedly installed with a cantilever. The cantilever is of a hollow structure. A slider is slidably installed on the inner wall of the cantilever. A turntable is rotatably installed on the lower surface of the slider. An installation box is fixedly installed on the lower surface of the turntable. Two support shafts are respectively fixedly installed between the opposite inner walls of the installation box. Winding rollers are rotatably installed on the outer surfaces of both ends of the two support shafts. A steel wire rope is wound around the outer surface of the winding roller. The end of the steel wire rope away from the winding roller is fixedly installed with a hook. A winding mechanism for driving the four winding rollers to rotate is provided inside the installation box.

[0006] As a further solution of the present invention, the winding mechanism includes two groups of fixing plates symmetrically and fixedly installed on the outer surfaces of opposite sides of the installation box in pairs. A transmission shaft is rotatably installed through the outer surfaces of a pair of two fixing plates in one group. Sleeves are slidably installed at both ends of the transmission shaft. A first friction disk is fixedly installed at the end of the sleeve away from the transmission shaft. Spline grooves are formed on the outer surfaces of both ends of the transmission shaft. A clamping block matching the spline groove is fixedly installed inside the sleeve. An electromagnet is fixedly installed at the center of the first friction disk. A rotating shaft is rotatably installed inside the installation box near the winding roller. The rotating shaft and the transmission shaft are arranged on the same axis, and a second friction disk is fixedly installed at the end of the rotating shaft near the first friction disk. An iron block is fixedly installed at the center of the second friction disk. A worm is fixedly installed on the outer surface of the rotating shaft. A worm gear is fixedly installed on the outer surface of the support shaft. The worm is meshed with the worm gear.

[0007] As a further solution of the present invention, a tension spring is sleeved on the outer surface of the sleeve. The tension spring is fixedly installed between the first friction disk and the fixing plate.

[0008] As a further solution of the present invention, belt pulleys are fixedly installed on the outer surfaces of both transmission shafts. A belt is sleeved on the outer surfaces of the two belt pulleys. A double-shaft motor is fixedly installed inside the installation box. The two output ends of the double-shaft motor are fixedly installed at the rotation center of one of the transmission shafts.

[0009] As a further solution of the present invention, a stepping motor is fixedly installed on the inner wall of the slider. The output end of the stepping motor penetrates through the lower surface of the slider and is fixedly installed at the rotation center of the turntable.

[0010] As a further solution of the present invention, a transmission lead screw is rotatably installed between the inner walls of opposite ends of the cantilever. The transmission lead screw penetrates through the outer surface of the slider and is threadedly connected thereto. A driving motor is fixedly installed on the outer surface of one end of the cantilever. The output end of the driving motor penetrates through the inner wall of the cantilever and is fixedly installed at the rotation center of the transmission lead screw.

[0011] As a further solution of the present invention, two expansion arms are symmetrically and rotatably installed on opposite sides of the base near the hydraulic expansion rod. An expansion mechanism for driving the two expansion arms to contract is installed on the outer surface of the base.

[0012] As a further solution of the present invention, the expansion mechanism includes a connecting plate fixedly mounted on the outer surface of the base, a driving screw is rotatably mounted between the connecting plate and the base, a push rod is threadedly connected to the outer surface of the driving screw, a transmission motor is fixedly mounted on the outer surface of the connecting plate, the output end of the transmission motor passes through the outer surface of the connecting plate and is fixedly mounted to the rotation center of the driving screw, guide columns are fixedly mounted on the lower surfaces of both ends of the push rod, a guide groove matching the guide column is provided on the upper surface of the expansion arm, and the guide column is slidably mounted to the inner wall of the guide groove.

[0013] As a further solution of the present invention, an outer surface of the extension arm at one end away from the rotation center is threadedly connected from top to bottom with an adjusting screw, and a support seat is fixedly installed at the bottom end of the adjusting screw.

[0014] The beneficial effects of the present invention are: 1. By simultaneously connecting the four electromagnets set in the installation box, the four electromagnets can make the four groups of first friction discs and second friction discs contact each other. At this time, a transmission shaft is driven to rotate by a dual-axis motor. Since the two transmission shafts are connected by a belt and a pulley, the two transmission shafts can rotate synchronously, so that the two transmission shafts can synchronously drive the rotating shaft to rotate, so that the worm fixed on the outer surface of the rotating shaft can rotate accordingly, and the worm wheel meshing with the worm can rotate accordingly, so that the worm wheel can synchronously drive the winding roller to rotate, so that the four winding rollers can retract and release the wire rope at the same time, which can achieve load balance at different positions and ensure that the hoisted air-conditioning unit components are evenly stressed. This can reduce the tilt and shaking of the crane and improve the stability and safety of the hoisting.

[0015] 2. When hoisting the air-conditioning unit components for installation, since there is a certain inclination angle between the air-conditioning unit components and the installation position, one or two electromagnets can be selectively connected as needed to make one or two first friction discs contact with the second friction disc, thereby controlling one or two winding rollers to retract and release the wire rope, so that the center of gravity of the air-conditioning unit components can be adjusted according to the length of the wire rope, and the installation angle of the air-conditioning unit components can be adjusted, which facilitates the installation of the air-conditioning unit components and improves the maintenance efficiency of the air-conditioning unit.

[0016] 3. The turntable is driven by a stepper motor to rotate, which can adjust the deflection angle of the installation box, thereby rotating the positions of the four steel ropes installed on the installation box, so as to rotate and adjust the suspended air-conditioning unit components to facilitate installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a nuclear power air conditioning unit maintenance hoisting device proposed by the present invention; Figure 2Schematic diagram of the deployed state of a maintenance hoisting device for a nuclear power air conditioning unit proposed by the present invention; Figure 3 Schematic diagram of the cantilever structure of a maintenance hoisting device for a nuclear power air conditioning unit proposed by the present invention; Figure 4 Schematic diagram of the internal structure of the slider of a maintenance hoisting device for a nuclear power air conditioning unit proposed by the present invention; Figure 5 Schematic diagram of the turntable and installation box structure of a maintenance hoisting device for a nuclear power air conditioning unit proposed by the present invention; Figure 6 Schematic diagram of the internal structure of the installation box of a maintenance hoisting device for a nuclear power air conditioning unit proposed by the present invention; Figure 7 Schematic diagram of the split structure of the transmission shaft and the sleeve of a maintenance hoisting device for a nuclear power air conditioning unit proposed by the present invention; Figure 8 Schematic diagram of the push rod structure of a maintenance hoisting device for a nuclear power air conditioning unit proposed by the present invention.

[0018] In the figure: 1. Base; 2. Locking universal wheel; 3. Hydraulic telescopic rod; 4. Cantilever; 5. Transmission lead screw; 6. Slide block; 7. Turntable; 8. Installation box; 9. Support shaft; 10. Winding roller; 11. Steel wire rope; 12. Hook; 13. Worm gear; 14. Rotating shaft; 15. Worm; 16. Second friction disc; 17. Fixed plate; 18. Transmission shaft; 19. Sleeve; 20. First friction disc; 21. Tension spring; 22. Electromagnet; 23. Spline groove; 24. Belt pulley; 25. Belt; 26. Biaxial motor; 27. Driving motor; 28. Guide groove; 29. Connecting plate; 30. Driving lead screw; 31. Push rod; 32. Transmission motor; 33. Adjusting lead screw; 34. Support seat; 35. Guide post; 36. Stepper motor; 37. Extension arm. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0020] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Next, the present invention will be described in detail with reference to the drawings and in conjunction with the embodiments.

[0021] Refer to the attached Figure 1 - attached Figure 8A nuclear power air-conditioning unit maintenance hoisting device includes a base 1, a plurality of locking universal wheels 2 are evenly fixedly installed on the bottom of the base 1, a hydraulic telescopic rod 3 is fixedly installed on the upper surface of the base 1, and a cantilever 4 is fixedly installed on the telescopic end of the hydraulic telescopic rod 3. The cantilever 4 is a hollow structure, and a slider 6 is slidably installed on the inner wall of the cantilever 4, and a turntable 7 is rotatably installed on the lower surface of the slider 6. A mounting box 8 is fixedly installed on the lower surface of the turntable 7, and two supporting shafts 9 are fixedly installed between the inner walls of the opposite sides of the mounting box 8. Winding rollers 10 are rotatably installed on the outer surfaces of both ends of the two supporting shafts 9. A steel wire rope 11 is wound on the outer surface of the winding roller 10, and a hook 12 is fixedly installed on the end of the steel wire rope 11 away from the winding roller 10. A winding mechanism for driving the four winding rollers 10 to rotate is provided inside the mounting box 8.

[0022] In this embodiment, the winding mechanism includes two groups of fixed plates 17 symmetrically fixedly installed on the outer surfaces of the opposite sides of the mounting box 8 in groups of two. A transmission shaft 18 is rotatably installed between the outer surfaces of the two fixed plates 17 in one group. A sleeve 19 is slidably installed at both ends of the transmission shaft 18. A first friction disc 20 is fixedly installed on the end of the sleeve 19 away from the transmission shaft 18. Spline grooves 23 are provided on the outer surfaces of both ends of the transmission shaft 18. A card block matching the spline groove 23 is fixedly installed inside the sleeve 19. An electromagnet 22 is fixedly installed at the center position of the first friction disc 20. A rotating shaft 14 is rotatably installed inside the mounting box 8 near the winding roller 10. The rotating shaft 14 and the transmission shaft 18 are arranged on the same axis, and a second friction disc 16 is fixedly installed on one end of the rotating shaft 14 near the first friction disc 20. An iron block is fixedly installed at the center position of the second friction disc 16. A worm 15 is fixedly installed on the outer surface of the rotating shaft 14, and a worm wheel 13 is fixedly installed on the outer surface of the support shaft 9. The worm 15 meshes with the worm wheel 13.

[0023] When in use, the four hooks 12 provided in the device are connected and fixed to the air-conditioning unit components to be hoisted, and the four electromagnets 22 provided in the installation box 8 are turned on at the same time, so that the four electromagnets 22 can make the four groups of first friction discs 20 and second friction discs 16 contact each other. At this time, a transmission shaft 18 is driven to rotate by a dual-axis motor 26. Since the two transmission shafts 18 are connected to the pulley 24 through a belt 25, the two transmission shafts 18 can rotate synchronously, so that the two transmission shafts 18 can synchronously drive the rotating shaft 14 to rotate, so that the worm 15 fixedly installed on the outer surface of the rotating shaft 14 can rotate accordingly, so that the worm wheel 13 meshing with the worm 15 can rotate accordingly, so that the worm wheel 13 can synchronously drive the winding roller 10 to rotate, so that the four winding rollers 10 can simultaneously retract and release the wire rope 11, thereby realizing the lifting or lowering of the air-conditioning unit components.

[0024] In this embodiment, a tension spring 21 is sleeved on the outer surface of the sleeve 19. The tension spring 21 is fixedly installed between the first friction disk 20 and the fixed plate 17. The tension spring 21 is used to pull the first friction disk 20 to reset after the power supply of the electromagnet 22 is disconnected, so that the first friction disk 20 is disconnected from the second friction disk 16.

[0025] In this embodiment, belt pulleys 24 are fixedly installed on the outer surfaces of the two transmission shafts 18. A belt 25 is sleeved on the outer surfaces of the two belt pulleys 24. A dual-axis motor 26 is fixedly installed inside the installation box 8. The two output ends of the dual-axis motor 26 are fixedly installed with the rotation centers of one of the transmission shafts 18.

[0026] In this embodiment, a stepper motor 36 is fixedly installed on the inner wall of the slider 6. The output end of the stepper motor 36 penetrates through the lower surface of the slider 6 and is fixedly installed with the rotation center of the turntable 7.

[0027] During use, the stepper motor 36 drives the turntable 7 to rotate, so that the deflection angle of the installation box 8 can be adjusted, thereby rotating the positions of the four steel wire ropes 11 installed on the installation box 8, so as to rotate and adjust the hoisted air-conditioning unit components, which is convenient for installation.

[0028] In this embodiment, a transmission lead screw 5 is rotatably installed between the inner walls of the opposite ends of the cantilever 4. The transmission lead screw 5 penetrates through the outer surface of the slider 6 and is threadedly connected thereto. A drive motor 27 is fixedly installed on the outer surface of one end of the cantilever 4. The output end of the drive motor 27 penetrates through the inner wall of the cantilever 4 and is fixedly installed with the rotation center of the transmission lead screw 5.

[0029] During use, the drive motor 27 drives the transmission lead screw 5 to rotate, so that the transmission lead screw 5 can drive the slider 6 to move inside the cantilever 4, so as to move the position of the hoisted air-conditioning unit components.

[0030] In this embodiment, two expansion arms 37 are symmetrically and rotatably installed on the opposite sides of the base 1 close to the hydraulic expansion link 3. An expansion mechanism for driving the two expansion arms 37 to contract is installed on the outer surface of the base 1. The expansion mechanism includes a connecting plate 29 fixedly installed on the outer surface of the base 1. A drive lead screw 30 is rotatably installed between the connecting plate 29 and the base 1. A push rod 31 is threadedly connected to the outer surface of the drive lead screw 30. A drive motor 32 is fixedly installed on the outer surface of the connecting plate 29. The output end of the drive motor 32 penetrates through the outer surface of the connecting plate 29 and is fixedly installed with the rotation center of the drive lead screw 30. Guide posts 35 are fixedly installed on the lower surfaces of both ends of the push rod 31. Guide grooves 28 matching the guide posts 35 are formed on the upper surface of the expansion arm 37. The guide posts 35 are slidably installed on the inner walls of the guide grooves 28. An adjustment lead screw 33 is threadedly connected from top to bottom on the outer surface of the end of the expansion arm 37 far from its rotation center. A support base 34 is fixedly installed at the bottom end of the adjustment lead screw 33.

[0031] When in use, the driving screw 30 is driven to rotate by the transmission motor 32, so that the push rod 31 threadedly connected to the outer surface of the driving screw 30 moves toward the direction of the hydraulic telescopic rod 3, so that the guide column 35 installed on the push rod 31 can push the expansion arm 37 outward through the guide groove 28, so that the expansion arm 37 increases the support range of the base 1, which can effectively prevent the device from tipping over during the lifting operation. By rotating the adjusting screw 33, the support seat 34 at the bottom end of the adjusting screw 33 is against the ground, so that the expansion arm 37 supports the device through the support seat 34.

[0032] From the above description, it can be seen that the above embodiment of the present invention achieves the following technical effects: when in use, the four hooks 12 provided in the device are connected and fixed to the air-conditioning unit components to be hoisted, and the four electromagnets 22 provided in the installation box 8 are simultaneously turned on, so that the four electromagnets 22 can all make the four sets of first friction discs 20 and second friction discs 16 contact each other. At this time, a transmission shaft 18 is driven to rotate by a dual-axis motor 26. Since the two transmission shafts 18 are connected to each other through a belt 25 and a pulley 24, the two transmission shafts 18 are connected to each other through a belt 25. The dynamic shaft 18 can rotate synchronously, so that the two transmission shafts 18 can synchronously drive the rotating shaft 14 to rotate, so that the worm 15 fixedly installed on the outer surface of the rotating shaft 14 can rotate accordingly, so that the worm wheel 13 meshing with the worm 15 can rotate accordingly, so that the worm wheel 13 can synchronously drive the winding roller 10 to rotate, so that the four winding rollers 10 can simultaneously retract and release the wire rope 11, which can achieve load balance at different positions and ensure that the hoisted air-conditioning unit components are evenly stressed. This can reduce the tilt and shaking of the crane and improve the stability and safety of the hoisting. When hoisting the air conditioning unit components for installation, if there is a certain inclination angle between the air conditioning unit components and the installation position, one or two electromagnets 22 can be selectively turned on as needed to make one or two first friction discs 20 contact the second friction disc 16, thereby controlling one or two winding rollers 10 to retract and extend the wire rope 11, thereby adjusting the center of gravity of the air conditioning unit components according to the length of the wire rope 11, and thus adjusting the installation angle of the air conditioning unit components, making it easier to install the air conditioning unit components. The stepper motor 36 drives the turntable 7 to rotate, which can adjust the deflection angle of the installation box 8, thereby rotating the positions of the four steel ropes 11 installed on the installation box 8, so as to rotate and adjust the suspended air conditioning unit components to facilitate installation; Before the hoisting operation, the driving motor 32 drives the driving lead screw 30 to rotate, so that the push rod 31 threadedly connected to the outer surface of the driving lead screw 30 moves towards the hydraulic telescopic rod 3, and the guide post 35 installed on the push rod 31 can push the extension arm 37 outwards through the guide groove 28, so that the extension arm 37 increases the support range of the base 1, effectively preventing the device from tipping over during the hoisting operation.

[0033] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be construed as limiting the claimed invention.

[0034] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A maintenance hoisting device for a nuclear power air-conditioning unit, comprising a base (1), and a plurality of locking universal wheels (2) are uniformly and fixedly installed at the bottom of the base (1), characterized in that, The upper surface of the base (1) is fixedly installed with a hydraulic telescopic rod (3). The telescopic end of the hydraulic telescopic rod (3) is fixedly installed with a cantilever (4). The cantilever (4) is of a hollow structure. A slider (6) is slidably installed on the inner wall of the cantilever (4). A turntable (7) is rotatably installed on the lower surface of the slider (6). An installation box (8) is fixedly installed on the lower surface of the turntable (7). Two support shafts (9) are respectively fixedly installed between the opposite inner side walls of the installation box (8). Winding rollers (10) are rotatably installed on the outer surfaces of both ends of the two support shafts (9). A steel wire rope (11) is wound around the outer surface of the winding roller (10). A hook (12) is fixedly installed at the end of the steel wire rope (11) away from the winding roller (10). A winding mechanism for driving the four winding rollers (10) to rotate is provided inside the installation box (8).

2. The overhaul hoisting device for a nuclear power air-conditioning unit according to claim 1, characterized in that, The winding mechanism includes two groups of fixed plates (17) symmetrically and fixedly installed on the outer surfaces of the opposite sides of the installation box (8) in pairs. A transmission shaft (18) is rotatably installed through the outer surfaces of a group of two fixed plates (17). Sleeves (19) are slidably installed at both ends of the transmission shaft (18). A first friction disk (20) is fixedly installed at the end of the sleeve (19) away from the transmission shaft (18). Spline grooves (23) are formed on the outer surfaces of both ends of the transmission shaft (18). A clamping block matching the spline groove (23) is fixedly installed inside the sleeve (19). An electromagnet (22) is fixedly installed at the central position of the first friction disk (20). A rotating shaft (14) is rotatably installed inside the installation box (8) close to the winding roller (10). The rotating shaft (14) and the transmission shaft (18) are arranged on the same axis. A second friction disk (16) is fixedly installed at the end of the rotating shaft (14) close to the first friction disk (20). An iron block is fixedly installed at the central position of the second friction disk (16). A worm (15) is fixedly installed on the outer surface of the rotating shaft (14). A worm gear (13) is fixedly installed on the outer surface of the support shaft (9). The worm (15) is meshed with the worm gear (13).

3. The overhaul hoisting device for a nuclear power air-conditioning unit according to claim 2, characterized in that, A tension spring (21) is sleeved on the outer surface of the sleeve (19). The tension spring (21) is fixedly installed between the first friction disk (20) and the fixed plate (17).

4. The overhaul hoisting device for a nuclear power air-conditioning unit according to claim 3, characterized in that, Pulley wheels (24) are fixedly installed on the outer surfaces of the two transmission shafts (18). A belt (25) is sleeved on the outer surfaces of the two pulley wheels (24). A double-shaft motor (26) is fixedly installed inside the installation box (8). The two output ends of the double-shaft motor (26) are fixedly installed at the rotation center of one of the transmission shafts (18).

5. The overhaul hoisting device for a nuclear power air-conditioning unit according to claim 4, wherein, A stepping motor (36) is fixedly installed on the inner wall of the slider (6). The output end of the stepping motor (36) penetrates through the lower surface of the slider (6) and is fixedly installed at the rotation center of the turntable (7).

6. The overhaul hoisting device for a nuclear power air-conditioning unit according to claim 1, characterized in that, A transmission lead screw (5) is rotatably installed between the inner walls at the opposite ends of the cantilever (4). The transmission lead screw (5) penetrates through the outer surface of the slider (6) and is threadedly connected thereto. A driving motor (27) is fixedly installed on the outer surface of one end of the cantilever (4). The output end of the driving motor (27) penetrates through the inner wall of the cantilever (4) and is fixedly installed with the rotation center of the transmission lead screw (5).

7. The overhaul and hoisting device for a nuclear power air-conditioning unit according to claim 1, wherein, Two extension arms (37) are symmetrically and rotatably installed on the opposite sides of the base (1) close to the hydraulic expansion rod (3). An expansion mechanism for driving the two extension arms (37) to contract is installed on the outer surface of the base (1).

8. The overhaul hoisting device for a nuclear power air-conditioning unit according to claim 7, characterized in that, The expansion mechanism includes a connecting plate (29) fixedly installed on the outer surface of the base (1). A driving lead screw (30) is rotatably installed between the connecting plate (29) and the base (1). A push rod (31) is threadedly connected to the outer surface of the driving lead screw (30). A transmission motor (32) is fixedly installed on the outer surface of the connecting plate (29). The output end of the transmission motor (32) penetrates through the outer surface of the connecting plate (29) and is fixedly installed with the rotation center of the driving lead screw (30). Guide columns (35) are fixedly installed on the lower surfaces at both ends of the push rod (31). Guide grooves (28) matching the guide columns (35) are formed on the upper surface of the extension arm (37). The guide columns (35) are slidably installed with the inner walls of the guide grooves (28).

9. The overhaul and hoisting device for a nuclear power air conditioning unit according to claim 8, characterized in that An adjusting lead screw (33) is threadedly connected to the outer surface of the extension arm (37) from top to bottom at the end far from its rotation center. A support base (34) is fixedly installed at the bottom end of the adjusting lead screw (33).

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