A hanging basket structure for moving up and down along the circumference of a large steel plate silo

Abstract

This invention provides a suspended platform structure for circumferential and vertical movement of large steel silos, relating to the field of suspended platform structure technology. It includes a main boom, a main support assembly, a circumferential adjustment mechanism, a secondary support assembly, a crossbeam, and a diagonal bracing mechanism. A forearm is fitted to the front end of the main boom, and a rear arm is fitted to the rear end. The circumferential adjustment mechanism also includes a locking mechanism. A bidirectional sleeve is fitted at the middle position of the crossbeam, and the bidirectional sleeve is fitted onto the outer front end of the forearm via a slot. Rollers are rotatably mounted on both the upper and lower sides of the forearm on the bidirectional sleeve. A sleeve is fitted on the forearm near the rear side. This device features a compact and reasonable overall structural design, significantly improving the ease of adjustment for multi-area circumferential operation of the silo. It adapts to the operational requirements of the silo's curved surface, offers simple and labor-saving adjustment, and has stronger structural practicality and environmental adaptability, effectively overcoming the shortcomings of traditional suspended platforms with fixed spacing and limited operational capabilities.

Description

Technical Field

[0001] This invention relates to the field of suspended platform structure technology, and in particular to a suspended platform structure for circumferential and vertical movement of large steel plate silos. Background Technology

[0002] In the construction and subsequent operation and maintenance of large steel silos, processes such as external wall welding, anti-corrosion coating, weld inspection, and daily maintenance all require the use of suspended platforms. The adjustability and overall structural stability of the suspended platform directly determine the construction efficiency and safety of the silo's external wall work. Currently, traditional suspended platforms used for steel silo construction mostly adopt fixed installation structures, with a fixed overall erection position. They can only achieve single up and down movements by relying on hoisting ropes, which cannot meet the requirements of circumferential full-coverage operations for cylindrical silos. When construction is required on different circumferential areas of the silo, the entire suspended platform must be disassembled and reassembled. The disassembly and assembly process is cumbersome and complex, involves a large amount of high-altitude disassembly and assembly work, and is extremely prone to causing high-altitude safety hazards.

[0003] Meanwhile, existing suspended platforms cannot adjust the radial distance between themselves and the silo walls. Steel silos typically have stiffening ribs, splicing flanges, and other protruding components on their outer walls. Suspended platforms with fixed spacing are prone to interference and collisions with these protruding structures, making it difficult to adjust the working distance according to the curved surface characteristics of the silo. This restricts worker operating space and compromises both operational convenience and construction quality. Furthermore, conventional suspended platform support systems are simplistic, lacking lateral and diagonal reinforcement designs. When adjusting their position, the overall structural rigidity is insufficient, resulting in poor adaptability and an inability to simultaneously meet the multiple requirements of circumferential movement, radial distance adjustment, and stable support. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a suspended basket structure for circumferential and vertical movement of large steel silos to solve the aforementioned problems.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a suspended platform structure for circumferential and vertical movement of a large steel silo, comprising a main boom, a main support assembly, a circumferential adjustment mechanism, a secondary support assembly, a crossbeam, and a diagonal bracing mechanism. A forearm is fitted to the front end of the main boom, and a rear arm is fitted to the rear end of the main boom. The circumferential adjustment mechanism further includes a locking mechanism. A bidirectional sleeve is fitted at the middle position of the crossbeam, and a slot is provided at the lower end of the bidirectional sleeve. The bidirectional sleeve is fitted onto the outer front end of the forearm through the slot. The forearm has evenly distributed rollers rotatably mounted on both its upper and lower sides, and these rollers all abut against the forearm. A sleeve is fitted onto the forearm near the rear side. The diagonal bracing mechanism includes lug assemblies fixedly mounted on the left and right ends of the sleeve. Fixed support rods are rotatably mounted on each lug assembly. A sleeve is provided on the end of each fixed support rod away from the lug assembly. The diagonal bracing mechanism also includes two sets of pins symmetrically mounted on the lower end of the crossarm. A movable support rod is rotatably mounted on each pin. The end of each movable support rod away from the pin passes through and is slidably connected to the inside of the corresponding sleeve.

[0006] Furthermore, the main support assembly includes a main support rod fitted on the rear arm, and the main support assembly also includes a base. A turntable is rotatably installed in the middle of the interior of the base. The lower end of the main support rod passes through the base and is fixedly connected to the turntable. A circular array of ball bearings is rotatably installed on the upper end of the turntable, and the upper end of the ball bearings abuts against the inner wall of the base.

[0007] Furthermore, two sets of fixing rods are symmetrically installed on the left and right sides of the upper end of the base, and multiple sets of counterweights are installed between the outer sides of the fixing rods.

[0008] Furthermore, the circumferential adjustment mechanism includes a circumferential gear fixedly mounted on the upper part of the outer side of the main support rod. The circumferential adjustment mechanism also includes a fixed platform fixedly mounted at the middle of the rear side of the base. A rotating rod is rotatably mounted at the middle of the upper end of the fixed platform. A main gear is fixedly mounted at the upper end of the rotating rod. The main gear meshes with the circumferential gear. A worm gear is also fixedly mounted on the rotating rod. A reduction motor is fixedly mounted at the rear of the upper end of the fixed platform. The front output shaft of the reduction motor is fixedly connected to a worm through a coupling. The worm meshes with the worm wheel.

[0009] Furthermore, the locking mechanism includes a locking screw that passes through and is threadedly connected to the middle of the rear end of the base. A locking block is rotatably connected to the front end of the locking screw. A sliding cavity is provided inside the base at the corresponding locking block. The locking block is slidably connected inside the sliding cavity. The locking block is adapted to the turntable. A through groove is also provided at the middle of the upper end of the locking block. A trapezoidal rubber block is rotatably installed inside the through groove of the locking block. The maximum thickness of the rear end of the trapezoidal rubber block is greater than the wall thickness of the through groove.

[0010] Furthermore, the secondary support assembly includes an armband fitted onto the forearm, with a connector installed between the left and right ends of the armband. A secondary support rod is fixedly installed at the lower end of the connector, and a base plate is fixedly installed at the lower end of the secondary support rod. An adjusting screw is threaded through and connected to each of the four corners of the base plate, and a self-locking swivel wheel is fixedly installed at the lower end of each adjusting screw.

[0011] Furthermore, a rotary connecting seat is fixedly installed at the middle of the rear end of the bidirectional sleeve, a radial screw is rotatably installed at the rear end of the rotary connecting seat, an internal thread seat is fixedly installed at the middle of the upper end of the sleeve, the rear end of the radial screw passes through and is threadedly connected to the inside of the internal thread seat, and a rotating wheel is fixedly installed at the rear end of the radial screw.

[0012] Furthermore, each of the fixed support rods has a fastening screw threaded through and connected to the middle of its lower end, and the upper end of each fastening screw abuts against the movable support rod. The diagonal support mechanism also includes a stop block installed on the forearm near the front end.

[0013] Furthermore, suspension rope assemblies are installed on both the left and right ends of the crossarm.

[0014] (III) Beneficial Effects This invention provides a suspended platform structure for the circumferential and vertical movement of large steel silos. It offers the following advantages: 1. This invention achieves smooth and continuous rotational adjustment of the entire suspended platform along the silo's circumference by combining a circumferential adjustment structure with a mechanical locking structure and relying on a multi-stage transmission method involving worm gears and gears. The overall transmission process is stable, highly accurate, and smooth in start and stop, enabling full-circumferential adjustment of the silo without dead angles. This eliminates the need for repeated manual disassembly and repositioning of traditional suspended platforms, significantly simplifying the construction process, reducing labor intensity and the risks of high-altitude disassembly and assembly. Furthermore, the worm gear transmission itself possesses excellent mechanical self-locking performance, achieving initial anti-deflection limit after adjustment, preventing damage caused by non-human external forces. The offset position, combined with the screw-type locking structure, can mechanically lock the turntable, using rubber compression deformation to achieve a snug fit. The double limit structure can effectively counteract the structural swaying caused by outdoor wind and personnel disturbance, improving the positioning accuracy of high-altitude operations. At the same time, it is equipped with a followable secondary support structure for auxiliary ground support, maintaining multi-point balanced force throughout the circumferential movement, effectively dispersing the load on the main support structure, and avoiding structural damage and deformation caused by local stress concentration. The overall structural layout is scientific and reasonable, with strong linkage, improving the stability and safety of the equipment's circumferential adjustment operation.

[0015] 2. This invention utilizes a threaded transmission combined with a sliding sleeve structure to achieve smooth forward and backward sliding of the entire suspended platform crossarm along the forearm. This allows for flexible adjustment of the radial working distance between the suspended platform and the steel silo wall, overcoming the technical shortcomings of traditional suspended platforms with fixed spacing that cannot adapt to curved silo surfaces. During adjustment, a rotating wheel drives the threaded screw to rotate, achieving stepless fine-tuning based on the self-locking characteristic of the threaded transmission. This results in high adjustment accuracy, effortless operation, and reliable positioning. Combined with a roller structure evenly distributed at the sliding position, it significantly reduces frictional resistance during sliding. Ensuring smooth, uninterrupted, and unshifted radial adjustment throughout the entire process, the working distance can be flexibly adjusted according to the curvature changes of the silo's arc-shaped outer wall, the distribution of external stiffening ribs, and various protruding components. This effectively avoids external protruding structures on the silo body, preventing hard collisions and scratches between the equipment and the silo body, protecting the integrity of the silo structure and anti-corrosion surface layer. At the same time, it can precisely match the optimal operating distance for different construction processes such as welding, rust removal, painting, and testing, improving the convenience of workers' operations and construction quality. The range of working conditions adaptable is wider, and the flexibility and practicality of structural adjustment are greatly improved.

[0016] 3. This invention features an optimized adaptive linkage diagonal bracing mechanism. It employs a combined support structure of rotatable moving and fixed support rods, enabling real-time adaptive angle rotation and length expansion / contraction compensation in response to the radial position adjustment of the crossarm. This maintains the optimal diagonal support angle and continuously provides stable and reliable diagonal support force for the crossarm and the working positions of the lifting ropes at both ends. This effectively improves the overall structural rigidity, deformation resistance, and overall load-bearing strength of the crossarm. Simultaneously, the telescopic structure can be locked and positioned via fastening screws. After adjustment, the overall support system exhibits sufficient rigidity and strong stability. Operation is flexible and highly adaptive. The overall component assembly is simple and compact, the structure is practical and easy to disassemble and maintain. Adaptive linkage adjustment can be achieved without adding complex control structures. It has low manufacturing costs, strong on-site adaptability, and comprehensively improves the overall structural stability, load-bearing capacity, and service life of the device, greatly meeting the needs of all-round, high-precision, and highly stable high-altitude operations in large steel silos. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a suspended basket structure for circumferential and vertical movement of large steel plate silos proposed in this invention. Figure 2 This is a schematic diagram of the main support assembly and circumferential adjustment mechanism for the circumferential and vertical movement of a large steel plate silo, as proposed in this invention. Figure 3 This invention proposes a method for circumferential and vertical movement of large steel silos. Figure 2 Enlarged structural diagram at point A; Figure 4 This invention proposes a method for circumferential and vertical movement of large steel silos. Figure 2 Enlarged structural diagram at point B; Figure 5 This is a schematic diagram of the internal structure of a locking block for circumferential and vertical movement of a large steel plate silo, as proposed in this invention. Figure 6 This is a schematic diagram of the structure of a secondary support assembly for circumferential and vertical movement of a large steel plate silo, as proposed in this invention. Figure 7 This is a schematic diagram of a radial adjustment structure for circumferential and vertical movement of a large steel plate silo, as proposed in this invention. Figure 8 This is a partial cross-sectional view of a structure proposed in this invention for circumferential and vertical movement of a large steel silo.

[0018] The components include: 1. Main boom; 11. Front boom; 12. Rear boom; 2. Main support assembly; 21. Main support rod; 22. Base; 23. Turntable; 24. Ball bearing; 25. Fixed rod; 26. Counterweight; 3. Circumferential adjustment mechanism; 31. Circumferential gear; 32. Fixed platform; 33. Rotating rod; 34. Main gear; 35. Worm gear; 36. Gearbox; 37. Worm; 38. Locking mechanism; 381. Locking screw; 382. Locking block; 383. Slide cavity; 384. Through groove; 385. Trapezoidal rubber block; 4. Secondary support assembly; 41. Arm clamp; 42. Connector; 43. Secondary support rod; 44. Base plate; 45. Adjusting screw; 46. Self-locking caster wheel; 5. Crossbeam; 51. Two-way insert; 52. Slot; 53. Roller; 54. Rotary connecting seat; 55. Radial screw; 56. Sleeve; 57. Internal thread seat; 58. Rotary wheel; 6. Diagonal brace mechanism; 61. Lifting lug assembly; 62. Fixed support rod; 63. Pipe sleeve; 64. Pin; 65. Moving support rod; 66. Fastening screw; 67. Stop block; 7. Lifting rope assembly. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and 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. Example

[0020] like Figures 1-8As shown, this embodiment of the invention provides a suspended platform structure for circumferential and vertical movement of a large steel silo, including a main boom 1, a main support assembly 2, a circumferential adjustment mechanism 3, a secondary support assembly 4, a crossbeam 5, and a diagonal bracing mechanism 6. A forearm 11 is fitted to the front end of the main boom 1, and a rear arm 12 is fitted to the rear end of the main boom 1. The main support assembly 2 includes a main support rod 21 fitted onto the rear arm 12. The main support assembly 2 also includes a base 22, with a turntable 23 rotatably mounted in the center of the base 22. The lower end of the main support rod 21 penetrates into the base 22 and is fixedly connected to the turntable 23. A circular array of ball bearings 24 is rotatably mounted on the upper end of the turntable 23, with the upper ends of the ball bearings 24 abutting against the inner wall of the base 22. Two sets of fixing rods 25 are symmetrically installed on both the left and right sides. Multiple sets of counterweights 26 are installed between the outer sides of the fixing rods 25. The circumferential adjustment mechanism 3 includes a circumferential gear 31 fixedly mounted on the upper outer side of the main support rod 21. The circumferential adjustment mechanism 3 also includes a fixed platform 32 fixedly mounted in the middle of the rear side of the base 22. A rotating rod 33 is rotatably mounted in the middle of the upper end of the fixed platform 32. A main gear 34 is fixedly mounted in the upper end of the rotating rod 33. The main gear 34 meshes with the circumferential gear 31. A worm gear 35 is also fixedly mounted on the rotating rod 33. A reduction motor 36 is fixedly mounted in the rear of the upper end of the fixed platform 32. The front output shaft of the reduction motor 36 is fixedly connected to a worm 37 through a coupling. The worm 37 meshes with the worm gear 35. In use, the main support assembly 2 is used to achieve overall stable erection. The geared motor 36 drives the worm 37 to rotate. Through the meshing transmission between the worm 37 and the worm wheel 35, the rotating rod 33 and the main gear 34 rotate synchronously. The meshing transmission between the main gear 34 and the ring gear 31 drives the main support rod 21 to drive the upper overall structure to rotate circumferentially in conjunction with the turntable 23, thereby completing the circumferential position adjustment of the device. The transmission structure of the worm 37 and the worm wheel 35 has mechanical self-locking performance, which can prevent self-deflection after circumferential adjustment.

[0021] like Figures 2-5 As shown, the circumferential adjustment mechanism 3 also includes a locking mechanism 38. The locking mechanism 38 includes a locking screw 381 that passes through and is threadedly connected to the middle of the rear end of the base 22. The front end of the locking screw 381 is rotatably connected to a locking block 382. The interior of the base 22 is provided with a sliding cavity 383 corresponding to the locking block 382. The locking block 382 is slidably connected inside the sliding cavity 383. The locking block 382 is adapted to the turntable 23. A through groove 384 is also provided at the middle of the upper end of the locking block 382. A trapezoidal rubber block 385 is rotatably installed inside the through groove 384 of the locking block 382. The maximum thickness of the rear end of the trapezoidal rubber block 385 is greater than the wall thickness of the through groove 384. After the circumferential adjustment is completed, the locking screw 381 is rotated to push the locking block 382 to slide inward along the slide cavity 383 and fit against the turntable 23. The trapezoidal rubber block 385 inside the locking block 382 is squeezed and tightly abuts against the surface of the turntable 23, thereby forming a double locking limit on the turntable 23, effectively suppressing possible shaking during high-altitude operations, dispersing the load on the overall structure, and improving the operational stability after circumferential positioning.

[0022] like Figures 1-6 As shown, the secondary support assembly 4 includes an arm hoop 41 fitted on the forearm 11. A connector 42 is installed between the left and right ends of the arm hoop 41. A secondary support rod 43 is fixedly installed at the lower end of the connector 42. A base plate 44 is fixedly installed at the lower end of the secondary support rod 43. An adjusting screw 45 is threaded through and connected to the base plate 44 near the four corners. A self-locking caster wheel 46 is fixedly installed at the lower end of the adjusting screw 45. A suspension rope assembly 7 is installed on the crossarm 5 near the left and right ends. The auxiliary support assembly 4 is fixed to the outside of the forearm 11 by the arm hoop 41. The auxiliary support rod 43 and the base plate 44 form an auxiliary support structure. Rotating the adjusting screw 45 can adjust the ground clearance of the self-locking caster 46, ensuring that the self-locking caster 46 reliably touches the ground for support. When the device moves in a circumferential direction, the self-locking caster 46 can slide synchronously, continuously sharing the load of the whole machine and further strengthening the overall support strength of the device. The vertical height adjustment of the basket is achieved by the lifting rope assembly 7 at both ends of the crossbeam 5 in conjunction with the external controller, which can meet the construction needs of large steel silos at different height positions.

[0023] like Figures 7-8As shown, a bidirectional sleeve 51 is fitted onto the crossarm 5 at its middle position. A slot 52 is provided at the lower end of the bidirectional sleeve 51. The bidirectional sleeve 51 is fitted onto the outer front end of the forearm 11 through the slot 52. Rollers 53 are rotatably mounted on both the upper and lower sides of the forearm 11 on the bidirectional sleeve 51, and the rollers 53 abut against the forearm 11. A rotary connecting seat 54 is fixedly installed at the middle of the rear end of the bidirectional sleeve 51. A radial screw 55 is rotatably mounted at the rear end of the rotary connecting seat 54. A sleeve 56 is fitted onto the forearm 11 near its rear side. An internal thread seat 57 is fixedly installed at the middle of the upper end of the sleeve 56. The rear end of the radial screw 55 passes through and is threaded into the interior of the internal thread seat 57. The rear end is fixedly installed with a rotating wheel 58. The diagonal bracing mechanism 6 includes a lug assembly 61 fixedly installed at the left and right ends of the sleeve 56. A fixed support rod 62 is rotatably installed on each lug assembly 61. A sleeve 63 is provided on the end of the fixed support rod 62 away from the lug assembly 61. The diagonal bracing mechanism 6 also includes two sets of pins 64 symmetrically installed at the lower end of the crossarm 5. A movable support rod 65 is rotatably installed on each pin 64. The end of the movable support rod 65 away from the pin 64 passes through and is slidably connected to the inside of the corresponding sleeve 63. A fastening screw 66 passes through and is threadedly connected to the middle of the lower end of each fixed support rod 62. The upper end of the fastening screw 66 abuts against the movable support rod 65. The diagonal bracing mechanism 6 also includes a stop block 67 installed on the forearm 11 near the front end. When adjusting the radial spacing, loosen the fastening screw 66 at the bottom of the fixed support rod 62 to release the sliding limit between the moving support rod 65 and the sleeve 63. Rotate the wheel 58 to drive the radial screw 55 to rotate. Through the threaded engagement between the radial screw 55 and the internal thread seat 57, the bidirectional insert 51 is pulled to slide smoothly along the outside of the forearm 11 with the help of the roller 53. This drives the crossarm 5 to complete the radial displacement of approaching or moving away from the silo wall. During the adjustment of the crossarm 5 position, the fixed support rod 62 rotates through the lug assembly 61, and the moving support rod 65 slides and extends along the inside of the sleeve 63, so that the diagonal bracing mechanism 6 adapts in real time. The changes in angle and length continuously provide diagonal reinforcement support to the crossarm 5. This structure abandons the traditional fixed suspended platform installation method and relies on the adjustable circumferential adjustment mechanism 3, the adaptive diagonal bracing mechanism 6, and the front and rear sliding crossarm 5 installation structure to enable the equipment to flexibly complete circumferential repositioning, height adjustment, and radial spacing adjustment. It can effectively avoid the stiffening ribs and splicing protrusions on the outer wall of the steel silo, and accurately adapt to the close-range operation requirements of the curved silo. All mechanisms work together in coordination, and the adjustment stroke is flexible and controllable, making it highly adaptable to various high-altitude operation conditions such as welding, corrosion protection, and maintenance of the outer wall of large steel silos.

[0024] Working Principle: This suspended platform structure, used for the circumferential and vertical movement of large steel silos, is stably erected using the main support assembly 2. The reduction motor 36 drives the worm gear 37, which in turn drives the rotating rod 33 and main gear 34 to rotate synchronously via the meshing transmission between the worm gear 37 and worm wheel 35. The meshing transmission between the main gear 34 and the circumferential gear 31 drives the main support rod 21 to rotate the upper structure in conjunction with the turntable 23, thus completing the circumferential position adjustment of the device. The transmission structure of the worm gear 37 and worm wheel 35 has a mechanical self-locking function, preventing self-deflection after circumferential adjustment. After the circumferential adjustment is completed, rotating the locking screw 381 pushes the locking block 382 along the sliding cavity. 383 slides inward and fits against turntable 23. The trapezoidal rubber block 385 inside the locking block 382 is squeezed and tightly abuts against the surface of turntable 23, thus forming a double locking limit on turntable 23, effectively suppressing possible shaking during high-altitude operations, dispersing the load on the overall structure, and improving the operational stability after circumferential positioning. The auxiliary support component 4 is fixed to the outside of the forearm 11 by the arm hoop 41. The auxiliary support rod 43 and the base plate 44 form an auxiliary support structure. Rotating the adjusting screw 45 can adjust the ground clearance of the self-locking caster 46, ensuring that the self-locking caster 46 reliably touches the ground for support. When the device moves circumferentially, the self-locking caster 46 can slide synchronously, continuously sharing the load of the whole machine. To further enhance the overall support strength of the device, the vertical height adjustment of the basket is achieved by the lifting rope assembly 7 at both ends of the crossbeam 5 in conjunction with the external controller, which can meet the construction needs of large steel silos at different height positions. When adjusting the radial spacing, loosen the fastening screw 66 at the bottom of the fixed support rod 62, release the sliding limit between the moving support rod 65 and the sleeve 63, rotate the wheel 58 to drive the radial screw 55 to rotate, and through the threaded engagement between the radial screw 55 and the internal thread seat 57, pull the bidirectional insert 51 to slide smoothly along the outside of the forearm 11 with the help of the roller 53, thereby driving the crossbeam 5 to complete the radial displacement closer to or away from the silo wall. During the adjustment of the position of the crossbeam 5, the fixed support rod 62 is connected to the lifting lug assembly. The rotating mechanism 61 and the sliding support rod 65 extend and retract within the sleeve 63, allowing the diagonal bracing mechanism 6 to adapt to changes in angle and length in real time, continuously providing diagonal reinforcement support to the crossarm 5. This structure abandons the traditional fixed suspended platform installation method, relying on the adjustable circumferential adjustment mechanism 3, the adaptive diagonal bracing mechanism 6, and the front and rear sliding crossarm 5 installation structure, enabling the equipment to flexibly complete circumferential repositioning, height adjustment, and radial spacing adjustment. It can effectively avoid stiffening ribs and splicing protrusions on the outer wall of the steel silo, accurately adapting to the close-range operation requirements of the curved silo. All mechanisms work together in coordination, and the adjustment stroke is flexible and controllable, greatly adapting to various high-altitude operation conditions such as welding, corrosion protection, and maintenance of the outer wall of large steel silos.

Claims

1. A suspended platform structure for circumferential and vertical movement of large steel plate silos, comprising a main boom (1), a main support assembly (2), a circumferential adjustment mechanism (3), a secondary support assembly (4), a crossbeam (5), and a diagonal bracing mechanism (6), characterized in that: The front end of the main boom (1) is fitted with a forearm (11), and the rear end of the main boom (1) is fitted with a rear boom (12). The circumferential adjustment mechanism (3) also includes a locking mechanism (38). A two-way sleeve (51) is fitted on the crossarm (5) at the middle position. A slot (52) is provided at the lower end of the two-way sleeve (51). The two-way sleeve (51) is fitted onto the outer front end of the forearm (11) through the slot (52). Rollers (53) are rotatably installed on both the upper and lower sides of the forearm (11) on the two-way sleeve (51). The rollers (53) all abut against the forearm (11). 11) A sleeve (56) is fitted on the upper part near the rear side. The diagonal bracing mechanism (6) includes a lug assembly (61) fixedly installed on the left and right ends of the sleeve (56). A fixed support rod (62) is rotatably installed on each lug assembly (61). A sleeve (63) is provided on the fixed support rod (62) at the end away from the lug assembly (61). The diagonal bracing mechanism (6) also includes two sets of pins (64) symmetrically installed on the lower end of the crossbeam (5). A movable support rod (65) is rotatably installed on each pin (64). The end of the movable support rod (65) away from the pin (64) passes through and slides inside the corresponding sleeve (63).

2. The suspended platform structure for circumferential and vertical movement of large steel silos according to claim 1, characterized in that: The main support assembly (2) includes a main support rod (21) fitted on the rear arm (12). The main support assembly (2) also includes a base (22). A turntable (23) is rotatably installed in the middle of the interior of the base (22). The lower end of the main support rod (21) passes through the base (22) and is fixedly connected to the turntable (23). A ball bearing (24) arranged in a circular array is rotatably installed on the upper end of the turntable (23). The upper end of the ball bearing (24) abuts against the inner wall of the base (22).

3. The suspended platform structure for circumferential and vertical movement of large steel silos according to claim 2, characterized in that: The upper end of the base (22) is symmetrically equipped with two sets of fixing rods (25) on both the left and right sides, and multiple sets of counterweights (26) are installed between the outer sides of the fixing rods (25).

4. A suspended platform structure for circumferential and vertical movement of large steel silos according to claim 2, characterized in that: The circumferential adjustment mechanism (3) includes a circumferential gear (31) fixedly mounted on the upper side of the main support rod (21). The circumferential adjustment mechanism (3) also includes a fixed platform (32) fixedly mounted on the middle of the rear side of the base (22). A rotating rod (33) is rotatably mounted on the middle of the upper end of the fixed platform (32). A main gear (34) is fixedly mounted on the upper end of the rotating rod (33). The main gear (34) meshes with the circumferential gear (31). A worm gear (35) is also fixedly mounted on the rotating rod (33). A geared motor (36) is fixedly mounted on the rear side of the upper end of the fixed platform (32). The front output shaft of the geared motor (36) is fixedly connected to a worm (37) through a coupling. The worm (37) meshes with the worm gear (35).

5. A suspended platform structure for circumferential and vertical movement of a large steel silo according to claim 2, characterized in that: The locking mechanism (38) includes a locking screw (381) that passes through and is threaded to the middle of the rear end of the base (22). The front end of the locking screw (381) is rotatably connected to a locking block (382). The interior of the base (22) is provided with a sliding cavity (383) corresponding to the locking block (382). The locking block (382) is slidably connected to the interior of the sliding cavity (383). The locking block (382) is adapted to the turntable (23). A through groove (384) is also provided at the middle of the upper end of the locking block (382). A trapezoidal rubber block (385) is rotatably installed inside the through groove (384) of the locking block (382). The maximum thickness of the rear end of the trapezoidal rubber block (385) is greater than the wall thickness of the through groove (384).

6. A suspended platform structure for circumferential and vertical movement of large steel silos according to claim 1, characterized in that: The secondary support assembly (4) includes an arm hoop (41) fitted on the forearm (11). A connector (42) is installed between the left and right ends of the arm hoop (41). A secondary support rod (43) is fixedly installed at the lower end of the connector (42). A base plate (44) is fixedly installed at the lower end of the secondary support rod (43). An adjusting screw (45) is threaded through and connected to the base plate (44) near the four corners. A self-locking caster wheel (46) is fixedly installed at the lower end of each adjusting screw (45).

7. A suspended platform structure for circumferential and vertical movement of large steel silos according to claim 1, characterized in that: A rotating connecting seat (54) is fixedly installed at the middle of the rear end of the bidirectional sleeve (51). A radial screw (55) is rotatably installed at the rear end of the rotating connecting seat (54). An internal thread seat (57) is fixedly installed at the middle of the upper end of the sleeve (56). The rear end of the radial screw (55) passes through and is threaded into the interior of the internal thread seat (57). A rotating wheel (58) is fixedly installed at the rear end of the radial screw (55).

8. A suspended platform structure for circumferential and vertical movement of large steel silos according to claim 1, characterized in that: The lower middle of the fixed support rod (62) is threaded with a fastening screw (66), and the upper end of the fastening screw (66) is pressed against the movable support rod (65). The diagonal support mechanism (6) also includes a stop block (67) installed on the forearm (11) near the front end.

9. A suspended platform structure for circumferential and vertical movement of a large steel silo according to claim 1, characterized in that: The crossarm (5) is equipped with a suspension rope assembly (7) near both the left and right ends.

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