Large radar array maintenance hoist

Abstract

The application discloses a maintenance lifting device for a large radar array, which comprises a driving unit, a guide rail, a trolley, a main platform and a moving platform. The driving unit is located at the top of the radar array or above the radar array. The guide rail is directly connected to the radar array. The trolley is slidably connected to the guide rail. The driving unit is connected to the trolley. The moving platform is located below the guide rail. The trolley is detachably connected to the main platform. When the radar array needs to be maintained, the main platform is connected to the trolley. When the radar array does not need to be maintained, the main platform is separated from the trolley and can be moved away along the moving platform. The application is more suitable for large radar arrays with pitching requirements. The main platform does not need to rotate with the radar array, thereby reducing the load of the pitching rotation, lowering the power required for the pitching drive and reducing the cost.

Description

Technical Field

[0001] This invention relates to the technical field of radar array maintenance lifting device, and more particularly to a maintenance lifting device for a large radar array. Background Technology

[0002] Radar maintenance lifting devices are mainly used to assist personnel in repairing and replacing components within the radar array. They are typically small maintenance platforms. Depending on the radar layout, some of these platforms are located on the array itself, while others are located on the outer edge of the array. They are used to transport maintenance personnel to the vicinity of the array to repair the components within it. Traditional maintenance platforms are often small, while large radars typically weigh hundreds of tons and have a height of at least 20 meters. Therefore, traditional small platforms are not suitable for large radar arrays.

[0003] Some maintenance platforms are fixedly installed on large radar arrays, making them unsuitable for large radar arrays with pitch and rotation capabilities. Other smaller maintenance platforms move with the radar array; when the radar array needs to pitch and rotate, the movement of these smaller platforms increases the rotational load and structural complexity. Furthermore, existing radar maintenance lifting devices do not adequately consider safety structures, making it difficult to fully guarantee personnel safety.

[0004] As described in announcement number CN209210131U, a maintenance platform for radar antennas comprises guide rails, a suspended platform assembly, an electric hoist, and limit switches. Its features include: guide rails symmetrically fixed on the left and right sides of the radar lifting tower, with the suspended platform assembly slidably mounted on the guide rails; fastening brackets and an electric hoist are sequentially fixed on the left and right sides of the upper part of the radar lifting tower between the guide rails; the wire rope of the electric hoist passes through the suspended platform assembly and is fixed to the fastening brackets; limit switches are installed at the upper and lower limit positions and the middle of the guide rail on one side of the electric hoist. This suspended platform method is unsuitable for radar arrays with heights exceeding 20m, where safety cannot be guaranteed and elevation requirements cannot be met.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The technical problem to be solved by this invention is: how to solve the problem that the current maintenance platform cannot meet the maintenance needs of large radars with elevation functions.

[0007] The present invention solves the above-mentioned technical problems through the following technical means:

[0008] A maintenance and lifting device for a large radar array includes a drive unit, a guide rail, a trolley, a main platform, and a moving platform. The drive unit is located at or above the top of the radar array. The guide rail is directly connected to the radar array. The trolley is slidably connected to the guide rail. The drive unit is connected to the trolley. The moving platform is located below the guide rail. The trolley is detachably connected to the main platform. When the radar array needs maintenance, the main platform is connected to the trolley. When the radar array does not need maintenance, the main platform is detached from the trolley and can be moved away along the moving platform.

[0009] This invention, by placing the drive unit on or above the top surface of the radar array, ensures that the trolley can reach the top of the radar array. The main platform can then move to any height on the array via the trolley to perform maintenance at any position on the array, meeting the maintenance needs of large arrays. By placing the guide rail on the radar array, and connecting the main platform to the trolley only during maintenance, the drive unit moves the trolley and main platform up and down along the guide rail. When maintenance is not needed, the main platform detaches from the trolley, and the radar array can perform pitching along with the guide rail, thus eliminating the need for the main platform to rotate with the radar array. Therefore, this invention is more adaptable to large radar arrays with pitch requirements. The main platform does not need to rotate with the radar array, reducing the load on pitch rotation, lowering the power required for pitch drive, and reducing costs. Simultaneously, it allows for a more compact and simpler radar array, eliminating the need for additional structures to support the main platform.

[0010] Preferably, the drive unit is connected to the top of the radar array, the drive unit includes a traction rope, the traction rope is connected to the trolley, there are two or more guide rails, at least two of the guide rails are connected to both sides of the radar array, one trolley is connected to each guide rail, and both ends of the main platform can be detachably connected to the trolley.

[0011] Multiple guide rails and trolleys can improve the reliability of the connection between the main platform and the radar array, enhance safety during maintenance, and improve the stability of operation.

[0012] Preferably, it also includes a pulley unit, which is connected to the top of the radar array, and the traction rope of the drive unit is connected to the trolley after passing through the pulley unit.

[0013] The traction rope can be adjusted in different directions by changing the position and angle of the pulley unit to adapt to different array top layouts, so that the angle at which the traction rope enters the drive unit meets the usage requirements, while the other end is aligned with the guide rail, which serves to adjust and guide it.

[0014] Preferably, the guide rail includes a guide rail body, a fixed mounting base, and a locking pin. One side of the guide rail body is connected to multiple fixed mounting bases, which are connected to the radar array. The locking pin is connected to the bottom end of the guide rail body. The bottom of the trolley includes a locking seat. When the radar array rotates in pitch, the locking pin is inserted into the locking seat.

[0015] The locking pin is used to insert into the locking seat when the radar array is pitched, so as to realize the fixed connection between the trolley and the guide rail and maintain the stability during pitching.

[0016] Preferably, the guide rail includes an anti-detachment block, and the trolley includes an anti-detachment component. When the drive unit is detached from the trolley during maintenance, the anti-detachment component is connected to the anti-detachment block.

[0017] Preferably, the anti-detachment component includes an anti-detachment hanging plate, an anti-detachment spring, and a spring base. The bottom end of the anti-detachment hanging plate is hinged to the trolley. The trolley has a through hole above the hinge point at the bottom end of the anti-detachment hanging plate. The anti-detachment spring is installed in the through hole. The spring base is connected to one end of the through hole. A connecting post is provided in the middle of the anti-detachment hanging plate. The connecting post is inserted into the other end of the through hole. The anti-detachment spring is connected to the spring base and the connecting post respectively. The top end of the anti-detachment hanging plate is provided with a limiting hook for hooking onto the traction rope. The side of the anti-detachment hanging plate includes multiple anti-detachment hooks.

[0018] When the traction rope is working normally, it is taut. The limit hook at the top of the anti-detachment plate hooks the traction rope and keeps it vertical. When the traction rope breaks and is no longer taut, the anti-detachment plate is popped out by the spring. When the anti-detachment plate approaches the anti-detachment block and contacts it and they bite each other, the pulley stops falling to avoid secondary injury.

[0019] Preferably, the trolley includes a mounting base, multiple pulley mechanisms, and multiple first hooks. The multiple pulley mechanisms are connected to the mounting base at intervals along the height direction of the mounting base. The pulley mechanisms are rotatably connected to the guide rail. The multiple first hooks are connected to the mounting base at intervals along the height direction of the mounting base.

[0020] Preferably, the pulley mechanism includes two symmetrically arranged pulley groups, which are respectively connected to both sides of the mounting base. Each pulley group includes a pulley bracket, a first pulley, a second pulley, and a third pulley. The pulley bracket is connected to both sides of the mounting base. The first pulley and the second pulley are connected to the pulley bracket, and the third pulley is connected to the mounting base. The first pulley, the second pulley, and the third pulley are respectively in rolling connection with the three sides of the guide rail.

[0021] The first, second, and third pulleys of the pulley block can form a concave layout, which can be locked onto both sides of the guide rail and roll along the guide rail, ensuring that the trolley does not deviate when rolling along the guide rail.

[0022] Preferably, the main platform includes a main frame and multiple mounting brackets, with multiple mounting brackets connected to both ends of the main frame, and the mounting brackets being detachably connected to the trolley.

[0023] The main platform also includes a positioning cone block, which is connected to the bottom of the main frame.

[0024] Preferably, the mobile platform includes a platform frame, a drive component, and a guide rail and pulley assembly, with the bottom of the platform frame connected to the guide rail and pulley assembly, and the drive component connected to the platform frame;

[0025] The mobile platform also includes limiting seats, which are located at both ends of the guide rail pulley assembly;

[0026] The mobile platform has positioning holes on its top surface.

[0027] The advantages of this invention are:

[0028] (1) This invention, by placing the drive unit on or above the top surface of the radar array, ensures that the trolley can reach the top of the radar array. The main platform can then reach any height on the array with the trolley to perform maintenance at any position on the array, meeting the maintenance needs of large arrays. By placing the guide rail on the radar array, and connecting the main platform to the trolley only during maintenance, the drive unit moves the trolley and main platform up and down along the guide rail. When maintenance is not needed, the main platform is detached from the trolley, and the radar array can achieve pitch function along with the guide rail. Thus, the main platform does not need to follow the radar array in pitch rotation. Therefore, this invention is more adaptable to large radar arrays with pitch requirements. The main platform does not need to rotate with the radar array, reducing the load on pitch rotation, lowering the power required for pitch drive, reducing costs, and making the radar array more compact and simple, without the need for additional structures to support the main platform.

[0029] (2) Multiple guide rails and trolleys can improve the reliability of the connection between the main platform and the radar array, improve the safety during maintenance, and improve the stability during operation.

[0030] (3) The traction rope can be adjusted in different directions by adjusting the position and angle of the pulley unit to adapt to different array top layouts, so that the angle of the traction rope entering the drive unit meets the usage requirements, and at the same time the other end is along the direction of the guide rail, which plays the role of adjustment and guidance.

[0031] (4) When the traction rope is working normally, it is in a taut state. The limit hook at the top of the anti-detachment hanging plate hooks the traction rope and keeps it in a vertical state. When the traction rope breaks and is no longer in a taut state, the anti-detachment hanging plate is popped out by the spring. When the anti-detachment hanging plate approaches the anti-detachment block and contacts and bites with it, the pulley stops falling to avoid secondary injury.

[0032] (5) The first pulley, the second pulley, and the third pulley of the pulley block can form a concave layout, which can be locked on both sides of the guide rail and roll along the guide rail, ensuring that the trolley does not deviate when rolling along the guide rail. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the maintenance and lifting device for a large radar array according to an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the structure of the driving unit according to an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the structure of the driving unit according to an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram showing the connection between the drive unit, pulley unit, and guide rail unit in an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the guide rail structure according to an embodiment of the present invention;

[0038] Figure 6 This is a schematic diagram of the structure of the trolley according to an embodiment of the present invention;

[0039] Figure 7 This is a schematic diagram of the structure of the trolley according to an embodiment of the present invention;

[0040] Figure 8 This is a cross-sectional view of the trolley according to an embodiment of the present invention;

[0041] Figure 9 This is a schematic diagram of the connection of the trolley sliding on the guide rail according to an embodiment of the present invention;

[0042] Figure 10 This is a top view of the connection between the guide rail and the trolley in an embodiment of the present invention;

[0043] Figure 11 This is a schematic diagram of the guide rail and trolley locking in an embodiment of the present invention;

[0044] Figure 12 This is a partial structural diagram of the main platform according to an embodiment of the present invention;

[0045] Figure 13 This is a partial structural diagram of the mobile platform according to an embodiment of the present invention;

[0046] Figure 14 This is a structural schematic diagram of a large radar array during maintenance according to an embodiment of the present invention;

[0047] Numbering on the map:

[0048] 1. Drive unit; 11. Mounting bracket; 12. Side mounting plate; 13. Connecting rod; 14. Drum; 15. Drive motor; 16. Angle measuring device; 17. Safety fall arrestor; 18. Traction rope;

[0049] 2. Pulley unit;

[0050] 3. Guide rail; 31. Guide rail body; 32. Fixed mounting base; 33. Locking pin; 34. Anti-detachment block;

[0051] 4. Trolley; 41. Mounting base; 42. Pulley mechanism; 421. Pulley bracket; 422. First pulley; 423. Second pulley; 424. Third pulley; 43. First hook; 44. Locking seat; 45. Anti-detachment component; 451. Anti-detachment hanging plate; 452. Anti-detachment spring; 453. Spring base;

[0052] 451. Anti-detachment hanging plate; 4511. Anti-detachment hook; 4512. Limiting hook; 4513. Connecting column;

[0053] 46. ​​Cross shaft seat; 47. Wire rope wedge assembly;

[0054] 5. Main platform; 52. Main frame; 51. Mounting bracket; 53. Positioning cone block;

[0055] 6. Mobile platform; 61. Platform frame; 62. Drive component; 63. Guide rail and pulley assembly; 64. First limit seat; 65. Second limit seat; 66. Positioning hole. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0057] Example 1:

[0058] like Figure 1As shown, a maintenance lifting device for a large radar array includes a drive unit 1, a pulley unit 2, a guide rail 3, a trolley 4, a main platform 5, and a moving platform 6. The drive unit 1 is located on or above the top surface of the radar array 7. The traction rope 18 of the drive unit 1 passes around the pulley unit 2 and is connected to the trolley 4. The guide rail 3 is directly connected to the radar array 7. The trolley 4 is slidably connected to the guide rail 3. The moving platform 6 is located below the guide rail 3. The trolley 4 is detachably connected to the main platform 5. When the radar array 7 needs maintenance, the main platform 5 is connected to the trolley 4 and moves up and down along the guide rail 3 under the action of the drive unit 1. When the radar array 7 does not need maintenance, the main platform 5 descends to the bottom and disengages from the trolley 4, connects to the moving platform 6, and can be moved away along the moving platform 6.

[0059] In this embodiment, there are two drive units 1, two pulley units 2, two guide rails 3, and two trolleys 4, arranged symmetrically. Both drive units 1 are fixedly connected to the center of the top surface of the radar array 7. The pulley units 2 are fixedly connected to both ends of the top surface of the radar array 7. The guide rails 3 are fixedly connected to both sides of the vertical surface of the radar array and are also vertically installed. The two trolleys 4 are slidably connected to the two guide rails 3 respectively. The guide rails 3 and trolleys 4 on both sides can improve the connection reliability between the main platform 5 and the radar array 7, improve safety during maintenance, and enhance the stability during operation.

[0060] like Figure 2 , Figure 3 As shown, the drive unit 1 includes a mounting frame 11, side mounting plates 12, connecting rods 13, drums 14, a drive motor 15, an angle measuring device 16, a safety fall arrester 17, and traction ropes 18. The top front and rear sides of the mounting frame 11 are respectively connected to the side mounting plates 12, with the two side mounting plates 12 arranged at intervals. The two ends of the multiple connecting rods 13 are respectively connected to the two side mounting plates 12. The two ends of the drum 14 are rotatably connected to the side mounting plates 12, and the ends of the drum 14 have gears. The drive motor 15 is mounted on the side mounting plates 12, and the drive end of the drive motor 15 is also connected to a gear. The gears of the drum 14 mesh with the gears of the drive motor 15, enabling the drive motor 15 to selectively drive the drum 14 to rotate. Each of the two drums 14 is connected to a traction rope 18, and the two traction ropes 18 can respectively wind and unwind under the rotation of the drums 14. The angle measuring device 16 is coaxially mounted with one of the drums 14, and the safety fall arrester 17 is meshed with the gears of both drums 14.

[0061] In this embodiment, the traction rope 18 is a steel wire rope.

[0062] The drive unit 1 is the power unit for lifting the trolley 4 and the main platform 5. The drive motor 15 drives the two drums 14 to rotate simultaneously through gear meshing. The extension and retraction of the traction rope 18 are achieved by the forward and reverse rotation of the drums 14.

[0063] like Figure 4 As shown, the traction rope 18 in the drive unit 1 passes around the pulley unit 2 and then passes in front of the guide rail 3.

[0064] The pulley unit 2 mainly consists of a bracket and pulleys. The number and angle of the pulleys can be determined according to the actual design. The traction rope 18 can be adjusted in position and angle by the pulley unit 2 to adapt to different top layouts of the radar array 7, so that the angle at which the traction rope 18 enters the drive unit 1 meets the usage requirements, while the other end is aligned with the guide rail 3, serving as an adjustment and guide.

[0065] like Figure 5 As shown, the guide rail 3 includes a guide rail body 31, a fixed mounting base 32, a locking pin 33, and an anti-detachment block 34. The guide rail body 31 can be a square rod. Multiple fixed mounting bases 32 are connected to one side of the guide rail body 31. The fixed mounting bases 32 are evenly spaced. (Refer to...) Figure 1 As shown, the fixed mounting base 32 is connected to the radar array 7, the locking pin 33 is connected to the bottom end of the guide rail body 31, and the anti-detachment block 34 is installed on the opposite side of the fixed mounting base 32. There are multiple anti-detachment blocks 34, which are arranged at intervals.

[0066] like Figure 6 , Figure 7 , Figure 8 As shown, the trolley 4 includes a mounting base 41, multiple pulley mechanisms 42, multiple first hooks 43, a locking seat 44, an anti-detachment component 45, a cross shaft seat 46, and a wire rope wedge block assembly 47.

[0067] The mounting base 41 is a square-section rod. Multiple pulley mechanisms 42 are spaced apart along the height of the mounting base 41. In this embodiment, there are three pulley mechanisms 42, arranged parallel to each other vertically. The pulley mechanisms 42 are tumbledly connected to the guide rail 3. Multiple first hooks 43 are spaced apart along the height of the mounting base 41, and are used to connect to the main platform 5. A locking seat 44 is connected to the lowest end of the mounting base 41. The locking seat 44 is a sleeve structure used to lock with the locking pin 33 of the guide rail 3, as shown in the figure. When maintenance is not required, the trolley 4 is fixed to the guide rail 3 by inserting the locking pin 33 into the locking seat 44, facilitating the pitch rotation of the radar array 7. The anti-detachment component 45 is opposite to the first hook 43. The anti-detachment component 45 is mainly used to catch the anti-detachment block 34 of the guide rail 3 when the wire rope accidentally breaks. The cross shaft seat 46 is connected to the top of the mounting base 41, and the wire rope wedge assembly 47 connects the cross shaft seat 46 to the wire rope.

[0068] Among them, such as Figure 7 As shown, the pulley mechanism 42 includes two symmetrically arranged pulley groups, which are respectively connected to both sides of the mounting base 41. Each pulley group includes a pulley bracket 421, a first pulley 422, a second pulley 423, and a third pulley 424. The pulley bracket 421 is fixedly connected to both sides of the mounting base 41 and includes two channel steels spaced vertically apart, with two mounting plates connecting the two channel steels. The mounting shaft of the first pulley 422 is mounted on one of the mounting plates along the length of the pulley bracket 421, and the mounting shaft of the second pulley 423 is mounted on the mounting plate at one end along the width of the pulley bracket 421. The central axis of the first pulley 422 is perpendicular to the central axis of the second pulley 423. The third pulley 424 is directly connected to the mounting base 41, as shown in the diagram. Figure 10 As shown, the first pulley 422, the second pulley 423, and the third pulley 424 are respectively rollably connected to the three sides of the guide rail 3. The first pulley 422, the second pulley 423, and the third pulley 424 of the pulley group can form a concave layout, which can be locked onto both sides of the guide rail 3 and roll along the guide rail 3, ensuring that the trolley 4 does not deviate when rolling along the guide rail 3.

[0069] The anti-detachment component 45 includes an anti-detachment hanging plate 451, an anti-detachment spring 452, and a spring base 453. The anti-detachment hanging plate 451 includes an anti-detachment hook 4511, a limiting hook 4512, and a connecting post 4513. The bottom end of the anti-detachment hanging plate 451 is hinged to a mounting base 41. A through hole is formed above the hinge point between the anti-detachment hanging plate 451 and the mounting base 41. The anti-detachment spring 452 is installed in the through hole. The spring base 453 is threaded or fixedly connected to one end of the through hole. The anti-detachment hanging plate 451... A connecting post 4513 is provided in the middle, and the connecting post 4513 is inserted into the other end of the through hole. The anti-detachment spring 452 is connected to the spring base 453 and the connecting post 4513 respectively. The top of the anti-detachment hanging plate 451 is provided with a limiting hook 4512 for hooking on the traction rope 18. When the traction rope 18 is in normal use, it is in a taut state. The limiting hook 4512 is hooked on the traction rope 18, keeping the anti-detachment hanging plate 451 in a vertical state. The side of the anti-detachment hanging plate 451 includes two anti-detachment hooks 4511 arranged at intervals. When the traction rope 18 is working normally, it is in a taut state. The limiting hook 4512 at the top of the anti-detachment hanging plate 451 hooks the traction rope 18 and keeps it in a vertical state. When the traction rope 18 breaks and is no longer in a taut state, the anti-detachment hanging plate 451 is popped out by the anti-detachment spring 452. When the anti-detachment hanging plate 451 approaches the anti-detachment block 34 and contacts and engages with it, the pulley 4 stops falling to avoid secondary injury.

[0070] The main platform 5 includes multiple hangers 51, which can be connected to and disconnected from the first hook 43 of the trolley 4.

[0071] The bottom of the main platform 5 can be positioned and connected or disconnected from the mobile platform 6. After the main platform 5 is connected to the mobile platform 6, the main platform 5 can be moved away from the radar array 7 by the movement of the mobile platform 6.

[0072] The working process of this embodiment:

[0073] When the radar is ready to operate, the radar array 7 needs to be pitched and rotated. At this time, the drive unit 1, pulley unit 2, guide rail 3, and trolley 4 are located on the radar array 7, and the main platform 5 is located on the mobile platform 6 at a position away from the radar array 7. The drive unit 1, pulley unit 2, guide rail 3, and trolley 4 can follow the pitch and rotation of the radar array 7.

[0074] When the radar is ready for maintenance, i.e., when the maintenance platform described in this embodiment is ready to work, the radar array 7 is tilted to a position perpendicular to the ground. Then, the two locking pins 33 on the two sets of guide rails 3 are unlocked. Then, the two sets of drive units 1 simultaneously release their respective wire ropes, causing the trolley 4 to slide down the guide rails 3 until the bottom of the trolley 4 contacts the buffer pad at the end of the moving platform 6 and stops. At this time, the position of the first hook 43 on the trolley 4 is lower than the position of the mounting base 51. Then, the moving platform 6 carries the main platform 5 and moves it to a suitable position on the array and stops. At this time, the two first hooks 43 of the trolley 4 are respectively located directly below the mounting base 51. Then, the drive unit 1 tightens the wire rope, causing the trolley 4 to move up the guide rails 3 until the two first hooks 43 engage with the mounting base 51. This is the case at both ends of the main platform 5. At this point, after the steel wire rope is tightened further, the main platform 5 and the mobile platform 6 separate. The main platform 5 can then be moved to any height on the array surface by the pulley 4 to complete maintenance at any position on the array surface. The mobile platform 6 remains stationary directly below the main platform 5 while the main platform 5 is working.

[0075] Conversely, when the maintenance platform is ready to finish its work, the two sets of drive units 1 first simultaneously release the wire ropes, causing the two sets of trolleys 4 to descend synchronously along the guide rail 3. The main platform 5 descends along with the trolleys 4. When the main platform 5 descends close to the moving platform 6 and makes stable contact with the moving platform 6, the drive unit 1 continues to release the wire ropes, and the trolleys 4 continue to descend until the two first hooks 43 are completely disengaged from the two hangers 51, and then stop. Then, the moving platform 6 drives the main platform 5 to move away from the radar array 7 to a suitable position and stop. Then, the wire ropes are tightened, causing the two sets of trolleys 4 to rise until the locking seat 44 is coaxial with the shaft hole of the locking pin 33, locking the locking pin 33. At this time, the array can start working and perform pitch and rotation movements.

[0076] When the trolley 4 is working, the wire rope is taut. The anti-detachment hanging plate 451 hooks the wire rope with the wire rope limiting hook 4512 to keep it vertical. In this state, the anti-detachment hook 4511 does not contact the anti-detachment block 34 on the guide rail 3, ensuring that the trolley 4 can slide smoothly along the guide rail 3. When two wire ropes on one trolley 4 break at the same time, the trolley 4 will fall under the action of gravity, and the wire rope will no longer be taut. At this time, the anti-detachment hanging plate 451 will no longer be vertical under the action of the anti-detachment spring 452 and will move closer to the guide rail 3. When the anti-detachment hook 4511 contacts the anti-detachment block 34 and they bite each other, the trolley 4 will stop falling to avoid secondary injury.

[0077] In this embodiment, by placing the drive unit 1 on or above the top surface of the radar array, the trolley 4 can reach the top of the radar array. The main platform 5 can then move with the trolley 4 to any height on the array to perform maintenance at any position, meeting the maintenance needs of large arrays. By placing the guide rail 3 on the radar array, the main platform 5 is only connected to the trolley 4 during maintenance. The drive unit 1 moves the trolley 4 and the main platform 5 up and down along the guide rail 3. When maintenance is not needed, the main platform 5 is detached from the trolley 4, and the radar array can perform pitch function along with the guide rail 3. Thus, the main platform 5 does not need to rotate with the radar array. Therefore, this invention is more adaptable to large radar arrays with pitch requirements. The main platform 5 does not need to rotate with the radar array, reducing the load on pitch rotation, lowering the power required for pitch drive, reducing costs, and making the radar array more compact and simple, without the need for additional structures to support the main platform 5.

[0078] Example 2:

[0079] like Figure 12 As shown, based on Embodiment 1, the main platform 5 includes a main frame 52, multiple hangers 51, and positioning cones 53. The main frame 52 can be made of welded steel and may consist of a support platform, stairs, railings, etc. On one side of the main frame 52, two hangers 51 are provided along the height direction. The hangers 51 can be connected to or detached from the first hook 43 of the trolley 4. The bottom of the main frame 52 includes six positioning cones 53 for positioning when the main platform 5 is connected to the mobile platform 6.

[0080] like Figure 13 As shown, the mobile platform 6 includes a platform frame 61, a drive unit 62, a guide rail and pulley assembly 63, a first limiting seat 64, a second limiting seat 65, and a positioning hole 66. The bottom of the platform frame 61 is connected to the guide rail and pulley assembly 63, and the drive unit 62 is connected to the platform frame 61, enabling the platform frame 61 to move along the guide rail and pulley assembly 63. The first limiting seat 64 and the second limiting seat 65 are located at opposite ends of the guide rail and pulley assembly 63. The first limiting seat 64, the second limiting seat 65, and the guide rail and pulley assembly 63 can be directly fixed to the ground. The first limiting seat 64 is located near the radar array 7, and its top surface is connected to a buffer pad to buffer the kinetic energy of the trolley 4 when it slides down to its lowest point. The surfaces of the first limiting seat 64 and the second limiting seat 65 facing the guide rail and pulley assembly 63 are also equipped with position sensors. The side of the platform frame 61 is equipped with a positioning block, which corresponds to the position of the position sensor and is used to sense the position information of the main platform 5.

[0081] The top surface of the platform frame 61 has positioning holes 66, and the number, shape and position of the positioning holes 66 are adapted to the positioning cone block 53.

[0082] The working process of this embodiment:

[0083] When the radar is ready for maintenance, i.e., when the maintenance platform described in this embodiment is ready to work, the radar array 7 is tilted to a position perpendicular to the ground. Then, the two locking pins 33 on the two sets of guide rails 3 are unlocked. Then, the two sets of drive units 1 simultaneously release their respective wire ropes, causing the trolley 4 to slide down the guide rails 3 until the bottom of the trolley 4 contacts the buffer pad at the top of the first limit seat 64 and stops. At this time, the position of the first hook 43 on the trolley 4 is lower than the position of the hanger 51. Then, the moving platform 6 carrying the main platform 5 is moved to the radar array 7 until the positioning block at the front end of the platform frame 61 contacts the first limit seat 64 and stops. At this time, the two first hooks 43 of the trolley 4 are respectively located directly below the hanger 51. Then, the drive unit 1 tightens the wire rope, causing the trolley 4 to move up the guide rails 3 until the two first hooks 43 respectively engage with the hanger 51. This is the case at both ends of the main platform 5. At this point, after the steel wire rope is tightened further, the main platform 5 and the mobile platform 6 separate. The main platform 5 can then be moved to any height on the array surface by the pulley 4 to complete maintenance at any position on the array surface. The mobile platform 6 remains stationary directly below the main platform 5 while the main platform 5 is working.

[0084] Conversely, when the maintenance platform is ready to finish its work, the two sets of drive units 1 first release the wire ropes simultaneously, causing the two sets of trolleys 4 to descend synchronously along the guide rail 3. The main platform 5 descends along with the trolleys 4. When the main platform 5 descends close to the moving platform 6, the positioning cone 53 at the bottom of the main platform 5 aligns with and stably contacts the positioning hole 66 of the moving platform 6. At this time, the drive unit 1 continues to release the wire ropes, and the trolleys 4 continue to descend until the two first hooks 43 are completely disengaged from the two hangers 51, and then stop. Then, the moving platform 6 drives the main platform 5 to move away from the array until the positioning block at the rear end of the platform frame 61 contacts the second limit seat 65 and stops. Then, the wire ropes are tightened, causing the two sets of trolleys 4 to rise until the locking seat 44 is coaxial with the shaft hole of the locking pin 33, locking the locking pin 33. At this time, the array can start to work and perform pitch and rotation movements.

[0085] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A maintenance lifting device for a large radar array, characterized in that, The system includes a drive unit, a guide rail, a trolley, a main platform, and a mobile platform. The drive unit is located at or above the top of the radar array. The guide rail is directly connected to the radar array. The trolley is slidably connected to the guide rail, and the drive unit is connected to the trolley. The mobile platform is located below the guide rail. The trolley and the main platform are detachably connected. The trolley includes multiple first hooks, and the main platform includes multiple mounting brackets. The mounting brackets can connect and disconnect from the first hooks of the trolley. When the radar array needs maintenance, the main platform connects to the trolley; when the radar array does not need maintenance, the main platform connects to the trolley. When maintenance is required, the main platform detaches from the trolley and can be moved along the mobile platform; the guide rail includes a guide rail body, a fixed mounting base, and a locking pin. Multiple fixed mounting bases are connected to one side of the guide rail body, and the fixed mounting bases are connected to the radar array. The locking pin is connected to the bottom end of the guide rail body. The bottom of the trolley includes a locking seat. When the radar array rotates in pitch, the locking pin is inserted into the locking seat; the main platform includes a main frame and multiple hangers. Multiple hangers are connected to both ends of the main frame, and the hangers are detachably connected to the trolley; The main platform also includes a positioning cone block, which is connected to the bottom of the main frame; The mobile platform includes a platform frame, a driving component, and a guide rail and pulley assembly. The bottom of the platform frame is connected to the guide rail and pulley assembly, and the driving component is connected to the platform frame. The mobile platform also includes limiting seats, which are located at both ends of the guide rail pulley assembly; The mobile platform has positioning holes on its top surface.

2. The maintenance lifting device for a large radar array according to claim 1, characterized in that, The drive unit is connected to the top of the radar array. The drive unit includes a traction rope, which is connected to the trolley. There are two or more guide rails, with at least two guide rails connecting to both sides of the radar array. Each guide rail is connected to one trolley. Both ends of the main platform can be detachably connected to the trolley.

3. The maintenance lifting device for a large radar array according to claim 1, characterized in that, It also includes a pulley unit, which is connected to the top of the radar array, and the traction rope of the drive unit is connected to the trolley after passing through the pulley unit.

4. The maintenance lifting device for a large radar array according to claim 1, characterized in that, The guide rail includes an anti-detachment block, and the trolley includes an anti-detachment component. When the drive unit is detached from the trolley during maintenance, the anti-detachment component is connected to the anti-detachment block.

5. A maintenance lifting device for a large radar array according to claim 4, characterized in that, The anti-detachment assembly includes an anti-detachment hanging plate, an anti-detachment spring, and a spring base. The bottom end of the anti-detachment hanging plate is hinged to the trolley. The trolley has a through hole above the hinge point at the bottom end of the anti-detachment hanging plate. The anti-detachment spring is installed in the through hole. The spring base is connected to one end of the through hole. A connecting post is provided in the middle of the anti-detachment hanging plate. The connecting post is inserted into the other end of the through hole. The anti-detachment spring is connected to the spring base and the connecting post respectively. The top end of the anti-detachment hanging plate is provided with a limiting hook for hooking onto the traction rope. The side of the anti-detachment hanging plate includes multiple anti-detachment hooks.

6. A maintenance lifting device for a large radar array according to claim 1, characterized in that, The trolley includes a mounting base, multiple pulley mechanisms, and multiple first hooks. The multiple pulley mechanisms are connected to the mounting base at intervals along the height direction of the mounting base. The pulley mechanisms are rotatably connected to the guide rail. The multiple first hooks are connected to the mounting base at intervals along the height direction of the mounting base.

7. A maintenance lifting device for a large radar array according to claim 6, characterized in that, The pulley mechanism includes two symmetrically arranged pulley groups, which are respectively connected to both sides of the mounting base. Each pulley group includes a pulley bracket, a first pulley, a second pulley, and a third pulley. The pulley bracket is connected to both sides of the mounting base. The first pulley and the second pulley are connected to the pulley bracket, and the third pulley is connected to the mounting base. The first pulley, the second pulley, and the third pulley are respectively in rolling connection with the three sides of the guide rail.

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