Tapered silo top supporting system for overhead large-diameter squat silo

Abstract

The invention relates to the technical field of silo grain storage engineering, in particular to an overhead type large-diameter squat silo conical silo top supporting system which comprises a steel truss and a bracket used for being fixedly installed on a silo wall, the steel truss comprises an inner cavity barrel formed by erecting steel frames and a plurality of radiation beams welded to the inner cavity barrel, and each radiation beam is connected with a lower chord member and a supporting rod; one end of the support rod is fixed at the bottom of the inner cavity cylinder, and the other end is fixed in the middle of the radiation beam; one end of each lower chord is fixed to the end of the corresponding radiation beam, the other end of each lower chord is fixed to the bottom of the inner cavity cylinder, the whole structure formed by the radiation beams and the supporting rods is in an umbrella shape, the ends, connected with the inner cavity cylinder, of the radiation beams are high, the ends, connected with the lower chords, of the radiation beams are low, and a plurality of reinforcing rods are fixed to each radiation beam. The multiple reinforcing rods are distributed in the length direction of the radiation beams, and each reinforcing rod is connected with two adjacent radiation beams. The scheme is used for solving the problem that the overall strength of an existing steel truss needs to be improved.

Description

Technical Field

[0001] The invention relates to the technical field of silo grain storage engineering, and in particular to an overhead large-diameter shallow circular silo conical silo roof support system. Background Art

[0002] Concrete silos have the advantages of large size, small footprint, low operating costs, smooth unloading, small environmental impact, and easy dust control. At the same time, as the vertical height and diameter of reinforced concrete silos continue to increase, higher requirements are placed on the construction management of silo roof projects.

[0003] The top structure of the silo mainly includes cone shell beam plate structure, grid, spherical shell and other forms. For the round silo with a cone silo roof, the umbrella truss support system can effectively support the structural load and provide good overall stability and rigidity during the construction of the cone silo roof. Compared with the traditional support system, it can be quickly installed and disassembled, saving construction time and speeding up the progress of the project. In addition, the umbrella truss support system can maximize the use of space and reduce the floor space. The application of this construction method optimizes construction resources, saves construction period, and achieves good economic benefits.

[0004] For example, the patent announcement number CN117145200A applied for in 2023 is a shallow circular silo top cone shell formwork structure and its construction process. In this technology, an umbrella-shaped truss structure is disclosed as the supporting structure of the conical silo roof. The ends of the umbrella-shaped truss are fixed on the corbels, and the corbels are fixed on the silo wall. The weight borne by the steel truss is distributed to each corbel installed on the silo wall.

[0005] Before the steel truss is placed on the corbel, it needs to be assembled and welded at the bottom of the silo, then lifted to a height higher than the corbel by a hoist, then the corbel is installed, and then the truss is placed on the corbel, and finally the corbel is welded to the truss. However, this method still has the following problems: First, because the diameter of the shallow cylindrical silo is large, which is more than 20 meters, the larger the diameter, the higher the load-bearing requirements for the steel truss. The current load-bearing capacity of the steel truss needs to be improved.

[0006] Second, the steel truss needs to be lifted from the bottom of the silo to the installation of the corbel, which requires lifting of 20 to 30 meters, or even higher. In order to avoid the steel truss from tilting and angled and colliding with the inner wall of the shallow circular silo during the lifting process, the lifting process is extremely slow. It takes several hours to lift a height of 30 meters, and during the lifting process, it is necessary to stay still for 20 minutes every time it is lifted to a certain height. After the steel truss is basically motionless, the height of the steel truss in each direction is checked to ensure that the steel truss is lifted without tilting or rotating at an angle beyond the range. The higher the lifting height, the higher the detection frequency and the longer the lifting time.

[0007] Although the prior art mentions a variety of methods to avoid the steel truss from tilting during the lifting process, such as the patent announcement number CN104074348B "A silo top truss platform lowering system and control method thereof", in this method, a space measurer, a laser transmitter, an electronic camera, etc. are set to monitor the tilt direction and tilt angle of the steel truss in real time, and the controller adjusts the working condition of the electric hoist according to the tilt condition. This method can play a monitoring role, but when the monitoring feedback is not timely, the steel truss is prone to hit or touch the silo wall; In a construction device of a cantilevered steel truss platform with patent announcement number CN212613671U, a telescopic roller device is installed at the end of the steel truss close to the warehouse wall. The telescopic roller device has rotatable steel balls, so that the steel truss is gradually lifted under the contact of the steel balls around the steel truss with the warehouse wall. This method can greatly reduce the probability of the steel truss hitting the warehouse wall, and has certain benefits for automatically balancing the inclination of the steel truss. However, it is difficult to detect the specific tilting direction during use, so it is difficult to achieve real-time monitoring, and after the lifting is completed, it cannot be ensured that the position of the steel truss is just right for convenient installation with the corbel.

[0008] To ensure the accuracy of the position after rising, a technology applied for in 2022 (publication number CN218714954U) silo tool-type silo roof support platform discloses that the steel truss moves along the fixed frame during the lifting process. Another technology applied for in 2024 (publication number CN117661833A) A construction device and construction method for a shallow circular silo with an umbrella frame structure also discloses that the slider on the steel truss moves along the slide groove. However, in actual construction, the installation of a slide groove or a fixed frame with a similar guide rail structure is very time-consuming. It is necessary to ensure that all guide rails are parallel to each other, and the fixed installation of the guide rail will inevitably require embedded parts on the silo wall for fixation. Otherwise, simply fixing it on the silo wall will damage the silo wall. This approach is time-consuming and labor-intensive, and as a result, it is not adopted in actual use. Instead, conventional steel trusses are still used to lift a small distance to measure the inclination direction and inclination angle. The slow speed brought by this lifting method seriously affects the efficiency of construction.

[0009] Third, after the steel truss is lifted to the set height, it is often the case that the fixed position of the corbel cannot be completely aligned with the radial beam in the steel truss. For this problem, the commonly used method is to weld the connection between the corbel and the radial beam, which ensures that as long as the offset angle between the steel truss and the corbel is not large, the steel truss and the corbel can be firmly connected by welding. However, this welding method requires cutting the connection between the corbel and the steel truss when it needs to be disassembled after the silo roof is built. The cutting is time-consuming and affects the secondary use of the steel truss. In addition, local stress concentration is easily caused after welding. Summary of the invention

[0010] The present invention is intended to provide an overhead large-diameter shallow circular silo conical silo roof support system to solve the problem that the overall strength of the current steel trusses needs to be improved.

[0011] In order to achieve the above object, the present invention adopts the following technical scheme: An overhead large-diameter shallow circular silo conical silo roof support system comprises a steel truss and a corbel for fixing on the silo wall, the steel truss comprises an inner cavity tube formed by a steel frame and a plurality of radiating beams welded on the inner cavity tube, each radiating beam is connected with a lower chord and a support rod, one end of the support rod is fixed to the bottom of the inner cavity tube, and the other end is fixed to the middle of the radiating beam; one end of the lower chord is fixed to the end of the radiating beam, and the other end is fixed to the bottom of the inner cavity tube, the overall structure formed by the radiating beam and the support rod is umbrella-shaped, the end of the radiating beam connected to the inner cavity tube is high, and the end connected to the lower chord is low, each radiating beam is fixed with a reinforcing rod, there are multiple reinforcing rods, the plurality of reinforcing rods are distributed along the length direction of the radiating beam, and each reinforcing rod is connected to two adjacent radiating beams.

[0012] The principle and advantage of this solution are: by installing reinforcing rods between the radiating beams, this solution makes the umbrella-shaped structure of the entire steel truss more integrated, the overall strength of the umbrella-shaped structure is higher, and the supporting strength is also better than the existing technology. Preferably, as an improvement, the corbel is provided with three pairs of connecting holes distributed along the height direction, the connecting holes are used to align with the threaded tubes embedded in the wall of the circular warehouse, one pair of connecting holes is located above the overlapping surface of the corbel and the radiation beam, and the remaining two pairs of connecting holes are located below the overlapping surface of the corbel and the radiation beam.

[0013] This solution distributes connection holes above and below the lap joint surface so that when the corbel is connected to the embedded part, there are multiple groups of bolts for connection. The top group of bolts pulls the corbel from above, while the bolts on the two pairs of connection holes below act on the corbel from below to form support for the lower part. The corbel has better supporting force on the steel truss.

[0014] Preferably, as an improvement, a force-bearing plate is fixed to the end of the radiating beam of the steel truss, and the force-bearing plate is used to be placed on the support plate on the corbel, and a plurality of matching holes are provided on the force-bearing plate, and a plurality of mounting holes are provided on the corbel, and the matching holes and the mounting holes can correspond to each other, and the bolt connection between the corbel and the steel truss is realized through the matching holes and the mounting holes, and the matching holes and / or the mounting holes are adjustment holes, and the adjustment holes can be adjusted when the angle of the steel truss is offset relative to the corbel.

[0015] Beneficial effect: When this solution is adopted, due to the errors in the production of the steel truss itself, the position of the embedded parts for fixing the bracket will also be biased, resulting in the inability to use the round hole to round hole bolt connection method when connecting the bracket and the steel truss, so only high-cost welding can be used. However, this solution provides an adjustment hole, so that when the relative angle between the two is offset, the connection between the two can be ensured through the adjustment hole, thereby avoiding the troublesome welding problem and the problem caused by cutting the connection position during disassembly.

[0016] Preferably, as an improvement, the mounting holes and the matching holes are both adjustment holes, and the adjustment holes on the force-bearing plate and the adjustment holes on the support plate intersect, so that no matter whether the steel truss is angularly offset or radially offset relative to the corbel, it can be ensured that the bolts are fully inserted into the matching holes and the mounting holes to complete the fixed connection between the corbel and the steel truss.

[0017] Preferably, as an improvement, the length of the adjustment hole on the support plate and the length of the adjustment hole on the force plate are arranged along the circumference of the inner cavity tube, and the other is arranged along the radial direction of the inner cavity tube. The radially arranged adjustment hole can make the mounting hole and the matching hole be aligned and the bolts be installed when the corbel is against the outer edge of the steel truss, so that the corbel is conveniently fixed on the steel truss before the steel truss is lifted, reducing the investment in the hanging basket, and when the corbel rises to the installation height with the steel truss, the nut is directly loosened so that the corbel can move radially relative to the steel truss and fix the corbel to the warehouse wall for fixing the corbel and the embedded threaded pipe, reducing the construction difficulty of the corbel in high-altitude operations, and the corbel can be pushed to the warehouse wall for installation. There is no need to manually take out the corbel from the hanging basket, and then the worker supports the corbel for installation, which avoids the problem of the corbel accidentally falling and greatly reduces the labor intensity of the workers.

[0018] Preferably, as an improvement, the corbel is detachably connected with a locking assembly, the locking assembly comprising a rack, a clamping block, a push rod and a rotating seat, the rack is fixed on the force plate, the clamping block is provided with a plurality of serrations inserted into the rack, the push rod is rotatably connected to the clamping block and the push rod can rotate relative to the clamping block, the push rod is threadedly connected to the rotating seat, the insertion rod of the rotating seat is rotatably connected to the support plate, the insertion rod is provided with a thread, the insertion rod can be locked on the corbel by a nut, the axial direction of the push rod is perpendicular to the axial direction of the insertion rod, the push rod is threadedly connected to a locking nut, and the locking nut is used to lock the position of the push rod on the rotating seat.

[0019] Beneficial effect: when the present scheme is adopted, after the installation of the corbel and the radial beam, the connection between the corbel and the steel truss is carried out by installing bolts on the intersecting adjustment holes. However, there is a low risk problem that the stability of the connection between the corbel and the steel truss is affected by severe external vibration. In the present scheme, after the corbel and the steel truss are connected, the rotating seat is rotated so that the clamping block can face the rack, and then the push rod is rotated so that the serrations of the clamping block and the rack are abutted, and finally the nut and the locking nut on the plug rod are screwed so that the position of the push rod and the position of the rotating seat are fixed. Because the rack and the clamping block are matched with teeth, and the rack is installed on the load-bearing plate, the whole formed by the clamping block, the push rod and the rotating seat is installed on the support plate, so the position locking of the corbel and the steel truss is achieved, and the disadvantage of the adjustment hole relative to the cylindrical hole in the connection stability is solved; in addition, because the rotating seat can be rotated and the push rod can be pushed axially, even if there is a small difference in the connection position between each corbel and the load-bearing plate on the steel truss, the locking assembly can be achieved.

[0020] Preferably, as an improvement, the corbel is detachably connected to a self-aligning assembly, the self-aligning assembly comprising a mounting seat, an adjustment cover, an elastic member and a universal roller, the mounting seat being detachably connected to the corbel, the adjustment cover being threadedly connected to the mounting seat, the sliding rod of the universal roller being slidably connected to the mounting seat, the sliding rod passing through the connecting hole and being coaxial with the connecting hole, a pressure sensor being arranged on the adjusting sleeve toward the bottom of the sliding rod, one end of the elastic member being used to abut against the sliding rod of the universal roller, and the other end being used to abut against the pressure sensor, and the universal roller being used to contact the warehouse wall.

[0021] Beneficial effect: When this solution is adopted, before the steel truss is lifted, the corbel is first moved along the length direction of the adjustment hole and adjusted to be close to the outer diameter of the steel truss, so that there is a distance between the corbel and the warehouse wall, and then the corbel and the steel truss are fixedly connected by at least two screws, and then the self-aligning component is installed on the corbel, and the position of the adjustment cover is adjusted to make the universal roller accurately positioned before the steel truss is lifted, and the pressure of the pressure sensors on the multiple self-aligning components on the entire support system is adjusted to be within the set pressure difference range, ensuring that the multiple universal rollers are basically consistent before the steel truss is lifted. During the lifting process, if the pressure difference between the pressure sensors exceeds the set value, the lifting is stopped by the controller, and the lifting height is adjusted for the side with low pressure or the side with high pressure detected by the pressure sensor, until the maximum pressure difference of all pressure sensors is within the set range, and then the steel truss is continued to be lifted.

[0022] Compared with the existing technology, this solution can prevent the steel truss from hitting the warehouse wall through the self-aligning component, and can also achieve automatic adjustment.

[0023] In addition, this solution ensures the position consistency of all pressure sensors at the beginning of lifting through the setting of pressure sensors and adjustment covers. During the lifting process, the pressure difference is monitored in real time by the pressure sensors and the control logic setting of the controller, so that when the angle tilt exceeds the set range, it can stop in time and make corrections.

[0024] Preferably, as an improvement, the centering assembly comprises an upper centering assembly and a lower centering assembly, both of which are installed on the connecting holes, and the universal roller can be inserted into the threaded tube after the corbel is aligned with the embedded threaded tube, the upper centering assembly is close to the end of the radial beam of the steel truss, and the lower centering assembly is installed on the lowest connecting hole on the corbel; so that when lifting, the steel truss has two sets of universal rollers at different heights as guides, which further reduces the situation where the support system hits the warehouse wall due to tilting. In addition, the two sets of universal rollers at different heights above and below also make the steel truss have better ability to automatically adjust and center.

[0025] In addition, after the corbel rises to the corresponding height, the universal roller on the self-aligning assembly can be inserted into the corresponding embedded threaded tube, thereby forming a pre-positioning of the corbel and the threaded tube before being fixed and connected, eliminating the operation of manually aligning the corbel with the embedded threaded tube. Even if there are errors due to construction, the angle of the corbel relative to the steel truss can be adjusted under the design of the adjustment hole to allow the universal roller of the self-aligning assembly to be inserted into the threaded tube to complete the positioning. After the positioning is completed, it is convenient for workers to quickly fix the corbel, and the whole operation is simpler and more convenient.

[0026] Preferably, as an improvement, a guide structure is installed at at least two embedded positions, and an upper centering assembly is installed on the corbels corresponding to the embedded positions with the guide structure. The guide structure includes a mounting plate fixed to a guide channel on the mounting plate, and the mounting plate can be bolted to the embedded threaded tube. The guide channel is trumpet-shaped at one end facing the bottom of the silo, and a trigger is installed on the top of the guide channel. The universal roller of the upper centering assembly can trigger the trigger on the guide channel after moving to the top along the guide channel.

[0027] Preferably, as an improvement, it further includes a controller, and the trigger is connected to the controller. After the trigger in the guide channel is triggered, the controller controls the lifting device to stop lifting.

[0028] In summary, the advantages of the present invention are as follows: First, the present invention adopts an umbrella-shaped steel truss, so that the whole structure has good supporting strength, and the provision of the reinforcing rod further improves the strength of the steel truss.

[0029] Secondly, the present invention also sets requirements for the embedded threaded pipes of the corbels, and sets three connection holes corresponding to the embedded threaded pipes, so that the corbels have better supporting performance for the steel trusses after installation.

[0030] Thirdly, the present invention avoids welding between the radiation beam and the corbel by connecting the corbel and the radiation beam with an adjustment hole, solves the problem of difficulty and high risk in welding the corbel and the radiation beam in the air, and avoids the problem of high local stress caused by welding; and the use of the adjustment hole in combination with the bolt reduces the alignment requirements of the corbel and the radiation beam, reduces the requirements for the rotation angle control during the lifting process, and also reduces the labor intensity of the manual labor, especially reduces the difficulty of disassembling the corbel and the steel truss. In addition, bolt connection instead of welding also improves the structural reuse rate of the entire support system, increases the turnover of parts in the support system, and reduces the cost of shallow silo roof construction.

[0031] Fourthly, the centering assembly of the present invention not only utilizes the centering assembly to form automatic centering of the steel truss during the rising process, but also ensures that the center of the inner cavity tube of the steel truss is aligned with the center of the circular bin during the lifting and lowering process, thereby preventing the steel truss from hitting the bin wall. In addition, the design of the pressure sensor and the adjustment cover on the centering assembly can reduce the difficulty of installing and adjusting the centering assembly after the center of the steel truss is aligned with the center of the circular bin, but also can monitor in real time during the lifting process which specific position of the steel truss has a tendency to approach the bin wall, thereby facilitating the controller to control and adjust, and to predict and adjust possible problems in advance. The lifting speed is improved, and the lifting process is only stopped and partially adjusted when the pressure difference between the pressure sensors exceeds the set value, which reduces the frequency of stopping the lifting and performing detection and adjustment, and greatly shortens the lifting time.

[0032] Fifth, when the entire steel truss is about to be lifted to the corbel installation height, the guide structure guides the position of the universal roller of the self-aligning assembly to ensure that at least two guide structures guide the universal roller to move to a very accurate position, and the guide structure itself is directly fixed with the help of the embedded threaded pipe, so it will not affect the quality of the warehouse wall, and the disassembly and assembly of the guide structure is very simple and fast.

[0033] Sixth, after lifting into place, the worker who installs the corbel only needs to directly loosen the lock between the corbel and the load-bearing plate to push the corbel toward the warehouse wall. During the pushing process of the corbel, the universal roller and the sliding rod on the self-aligning component originally inserted in the connecting hole are also inserted into the threaded tube to form a positioning for the corbel before fixed installation. At this time, the worker only needs to install the bolts on the remaining connecting holes that are not inserted with the self-aligning component, and then install the self-aligning component on the connecting hole. The installation of the corbel eliminates the process of workers taking it out of the hanging basket, lifting the corbel to position it, and then locking it. The whole operation is more labor-saving, especially for workers working at high altitudes. The present invention can shorten the duration of high-altitude operations and the labor intensity during high-altitude operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1It is a schematic diagram of the three-dimensional structure of the shallow cylindrical silo and the overhead large-diameter shallow cylindrical silo conical silo roof support system according to an embodiment of the present invention.

[0035] Figure 2 for Figure 1 The three-dimensional structural diagram only shows the steel trusses, corbels and embedded structures.

[0036] Figure 3 for Figure 2 main view.

[0037] Figure 4 for Figure 2 Top view of the .

[0038] Figure 5 The diagram is a half-section schematic diagram of the construction process of the conical silo roof of a large-diameter shallow circular silo according to the present invention (the conical silo roof is shown in the diagram).

[0039] Figure 6 It is a schematic front view of the conical shell casting sequence of the construction process of the conical silo roof of a large-diameter shallow circular silo of the present invention.

[0040] Figure 7 It is a top view of the conical shell casting sequence of the construction process of the conical silo roof of a large-diameter shallow circular silo of the present invention.

[0041] Figure 8 It is a partially enlarged schematic diagram showing the connection relationship between the embedded structure, the corbel, the radiation beam, the load-bearing plate and the locking assembly of the present invention.

[0042] Fig. 9 It is a schematic diagram of the three-dimensional structure of the embedded structure of the present invention.

[0043] Fig.10 for Fig. 9 main view.

[0044] Fig.11 It is a schematic diagram of the three-dimensional structure of the corbel of the present invention after the locking assembly and the centering assembly are installed on the corbel (the lower centering assembly is shown).

[0045] Fig.12 for Fig.11 Schematic diagram at another angle (showing the upper centering assembly).

[0046] Fig.13 for Fig.11 main view.

[0047] Fig.14 for Fig.11 Right view of .

[0048] Fig.15 for Figure 8 The partially enlarged schematic diagram in this figure shows the specific structure of the locking component.

[0049] Fig.16 for Fig.15 Cross-sectional view of the locking assembly.

[0050] Fig.17 It is an axial cross-sectional view of the centering assembly of the present invention.

[0051] Fig.18 This is a structural schematic diagram showing that the guide structure of the present invention is installed in a shallow cylindrical silo.

[0052] Fig.19 for Fig.18 Right side view of the middle guide structure (the figure shows the installation position of the guide structure). DETAILED DESCRIPTION

[0053] The following is further described in detail through specific implementation methods: The figure marks in the drawings of the specification include: steel truss 10, inner cavity tube 11, radiation beam 12, load-bearing plate 121, matching hole 1211, lower chord 13, support rod 14, reinforcement rod 15, corbel 20, connecting plate 21, connecting hole 211, support plate 22, mounting hole 221, reinforcement rib 23, embedded structure 30, threaded tube 31, limit rod 32, reinforcement plate 33, reinforcement rod 34, locking assembly 40, rack 41, tightening block 42, push rod 43, rotating seat 44, locking nut 45, centering assembly 50, mounting seat 51, adjustment cover 52, elastic member 53, universal roller 54, pressure sensor 55, pressure plate 56, guide structure 60, mounting plate 61, guide channel 62, trigger 63, round silo 100, template 200, lower ring beam 101, conical shell 102, silo top center 103.

[0054] The embodiment is basically as shown in the attached Figures 1 to 19 .

[0055] Combination Figures 1 to 4 The invention discloses an overhead large-diameter shallow circular silo conical silo roof support system, comprising a steel truss 10, a corbel 20 for fixing on the silo wall, and an embedded structure 30 for fixing the corbel 20 and embedded in the silo wall.

[0056] The steel truss 10 includes an inner cavity tube 11 formed by a steel frame, and a plurality of radiation beams 12 welded on the inner cavity tube 11, each radiation beam 12 is connected to a lower chord 13 and a support rod 14, one end of the support rod 14 is fixed to the bottom of the inner cavity tube 11, and the other end is fixed to the middle of the radiation beam 12; one end of the lower chord 13 is fixed to the end of the radiation beam 12, and the other end is fixed to the bottom of the inner cavity tube 11. The overall structure formed by the radiation beam 12 and the support rod 14 is umbrella-shaped, and the end of the radiation beam 12 connected to the inner cavity tube 11 is high, and the end connected to the lower chord 13 is low. A reinforcing rod 15 is fixed to each radiation beam 12, and there are multiple reinforcing rods 15. The multiple reinforcing rods 15 are distributed along the length direction of the radiation beam 12, and each reinforcing rod 15 is connected to two adjacent radiation beams 12. The multiple reinforcing rods 15 at the same length position of the radiation beam 12 form a circle, so that the strength of the entire steel truss 10 is greatly improved.

[0057] The corbel 20 includes a connecting plate 21, a support plate 22 and a reinforcing rib 23 made of metal. The connecting plate 21 is used to be attached to the embedded structure 30 on the warehouse wall. The support plate 22 is vertically fixed on the connecting plate 21. The support plate 22 is an I-shaped steel plate. The reinforcing rib 23 is supported between the support plate 22 and the connecting plate 21. The reinforcing rib 23 is also an I-shaped steel plate. The reinforcing rib 23, the support plate 22 and the connecting plate 21 form a triangular connection. Three pairs of connecting holes distributed along the height direction are provided on the connecting plate 21. The connecting holes are used to align with the threaded pipe 31 embedded in the warehouse wall of the round warehouse 100. One pair of connecting holes is located above the overlapping surface of the corbel 20 and the radiation beam 12, and the remaining two pairs of connecting holes are located below the overlapping surface of the corbel 20 and the radiation beam 12.

[0058] Upper and lower limit rods 32 are provided in the embedded structure 30, and the upper and lower limit rods 32 are distributed at the upper and lower positions of the threaded tube 31 to improve the strength of the embedded structure 30. The front and rear ends of all the threaded tubes 31 are fixed on the reinforcing plate 33, and the reinforcing rod 15 is welded on the reinforcing plate 33. All limit rods 32 are fixedly connected to the reinforcing rod 15. The upper and lower limit rods 32, the reinforcing plate 33, and the reinforcing rod 15 are all made of metal.

[0059] A load-bearing plate 121 is fixed to the bottom end of the radiation beam 12 of the steel truss 10. The load-bearing plate 121 is used to be placed on the support plate 22 of the corbel 20. A plurality of matching holes 1211 are opened on the load-bearing plate 121. A plurality of mounting holes 221 are opened on the corbel 20. The matching holes 1211 and the mounting holes 221 can correspond to each other. In the specific embodiment, there are 4 of them. The bolt connection between the corbel 20 and the steel truss 10 is realized through the matching holes 1211 and the mounting holes 221. The matching holes 1211 and the mounting holes 221 are connected to each other. Hole 221 is an adjustment hole, which can be adjusted when the steel truss 10 is offset in angle relative to the corbel 20. The adjustment hole on the force plate 121 and the adjustment hole on the support plate 22 intersect. Specifically, the length of the adjustment hole on the support plate 22 is arranged radially, and the length of the adjustment hole on the force plate 121 is arranged circumferentially along the inner cavity tube 11. The radially arranged adjustment holes can enable the mounting hole 221 and the matching hole 1211 to be aligned and the bolts to be installed when the corbel 20 is against the outer edge of the steel truss 10.

[0060] A locking assembly 40 is bolted to the corbel 20, and the locking assembly 40 includes a rack 41, a clamping block 42, a push rod 43, a rotating seat 44 and a locking nut 45. The rack 41 is fixed to the force plate 121, and the clamping block 42 is provided with a plurality of serrations inserted into the rack 41. The push rod 43 is rotatably connected to the clamping block 42 and the push rod 43 can rotate relative to the clamping block 42. The push rod 43 is threadedly connected to the rotating seat 44, and the insertion rod of the rotating seat 44 is rotatably connected to the support plate 22. The insertion rod is provided with threads, and the insertion rod can be locked to the corbel 20 by a nut. The axial direction of the push rod 43 is perpendicular to the axial direction of the insertion rod. The push rod 43 is threadedly connected to the locking nut 45, and the locking nut 45 is used to lock the position of the push rod 43 on the rotating seat 44.

[0061] A centering assembly 50 is bolted to the corbel 20, and the centering assembly 50 includes a mounting seat 51, an adjustment cover 52, an elastic member 53 and a universal roller 54. The mounting seat 51 is pressed on the connecting hole by a pressure plate 56 installed on the corbel 20, and the adjustment cover 52 is threadedly connected to the mounting seat 51. The sliding rod of the universal roller 54 is slidably connected to the mounting seat 51, and the sliding rod passes through the connecting hole and is coaxial with the connecting hole. A pressure sensor 55 is arranged on the adjusting sleeve toward the bottom of the sliding rod. One end of the elastic member 53 is used to abut against the sliding rod of the universal roller 54, and the other end is used to abut against the pressure sensor 55. The universal roller 54 is used to contact the warehouse wall. The elastic member 53 is a spring in this embodiment.

[0062] The centering assembly 50 is divided into an upper centering assembly 50 and a lower centering assembly 50. The upper centering assembly 50 and the lower centering assembly 50 have the same structure. Both the upper and lower centering assemblies 50 are installed on the connecting holes. The universal roller 54 can be inserted into the threaded tube 31 after the corbel 20 is aligned with the embedded threaded tube 31. The upper centering assembly 50 is installed on the connecting hole at the middle position of the end of the radiation beam 12 near the steel truss 10, and the lower centering assembly 50 is installed on the lowest connecting hole on the corbel 20.

[0063] A guide structure 60 is installed on the embedded structure 30 at two embedded positions. The guide structure 60 is located at two relatively embedded positions. An upper centering assembly 50 is installed on the corbel 20 corresponding to the embedded position with the guide structure 60. The guide structure 60 includes a mounting plate 61 fixed to a guide channel 62 on the mounting plate 61. The mounting plate 61 can be bolted to the embedded threaded tube 31. The end of the guide channel 62 facing the bottom of the silo 100 is horn-shaped. A trigger 63 is installed on the top of the guide channel 62. The universal roller 54 of the upper centering assembly 50 can trigger the trigger 63 on the guide channel 62 after moving to the top along the guide channel 62.

[0064] It also includes a controller, and the trigger 63, the pressure sensor 55, and the electric hoist are all connected to the controller. After the trigger 63 in the guide channel 62 is triggered, the controller controls the lifting device to stop lifting.

[0065] The specific process of this embodiment is as follows: A construction process for a large-diameter shallow circular silo with a conical silo roof comprises the following steps: S0. Preparation work, including the following: S01, assembling the steel truss 10 and aligning the center of the steel truss 10 with the center of the silo 100, and then fixing the corbel 20 on the load-bearing plate 121 of the radiation beam 12 of the steel truss 10, and making a distance between the corbel 20 and the silo wall; S02. Each corbel 20 is provided with a lower centering assembly 50 on the lowest connection hole. Upper centering assemblies 50 are provided on some corbels 20. The number of upper centering assemblies 50 is much less than that of lower centering assemblies 50. The upper centering assemblies 50 are provided on the connection holes close to the steel trusses 10. When the upper and lower centering assemblies 50 are provided on the same corbel 20, the connecting lines of the upper and lower centering assemblies 50 on the corbel 20 are diagonal. When used, the number of upper centering assemblies 50 is only 4. S03, adjusting the adjustment cover 52 on the centering assembly 50, so that the universal rollers 54 of all the centering assemblies 50 extend out of the connection holes of the corbels 20 and contact the warehouse wall, and the pressure difference between all the pressure sensors 55 is less than the set value (for example, the pressure of all the pressure sensors 55 is the same); The preparatory work also includes the installation of the guide structure 60. In the subsequent steps, the upper centering component 50 will be lifted to at least two pre-embedded positions to install the guide structure 60. The guide structure 60 is directly fixed to the pre-embedded threaded tube 31 by bolts; it also includes blocking the ports of the pre-embedded threaded tube 31 that the upper centering component 50 may pass through when it is subsequently lifted. The blocking method is to use an easily cut film or transparent tape to prevent the upper centering component 50 from being inserted into the threaded tube 31 during the lifting process.

[0066] S1. A lifting device consisting of multiple electric hoists is used to perform synchronous lifting from multiple positions around the steel truss 10. All electric hoists are connected to the same controller, and the pressure conditions of all pressure sensors are displayed on the controller. During the lifting process, the universal roller 54 of the centering component 50 contacts the warehouse wall. During the lifting process, if the pressure difference between all pressure sensors 55 of the upper centering component 50 / lower centering component 50 exceeds the set value, the lifting device is controlled by the controller to stop lifting, and the lifting height of each electric hoist is measured to determine which electric hoists lift faster and which lift slower, and the corresponding verification is performed with the high and low pressures of the pressure sensors 55. When the electric hoist corresponding to the centering component 50 with low pressure lifts too slowly, the electric hoist is started separately to compensate for the height difference until the pressure difference between the pressure sensors 55 meets the design requirements again and all electric hoists continue to be started.

[0067] S2. After the steel truss 10 is lifted to the upper centering assembly 50 and enters the embedded position, the universal roller 54 of the upper centering assembly 50 will move to the top of the guide channel 62 under the guidance of the guide structure 60, so that the trigger 63 is triggered. After the trigger 63 is triggered, the controller automatically controls the lifting device to stop lifting. Check the pressure display of the pressure sensor 55 on each upper centering assembly 50 and the corresponding lifting height of the electric hoist. When the pressure of the pressure sensor 55 of the upper centering assembly 50 is greater than the set value, it means that the lifting height is not enough, and the electric hoist at the corresponding position needs to be adjusted until the pressure difference of all the pressure sensors 55 of the upper centering assembly 50 is within the set range.

[0068] S3. Since all the upper centering components 50 are inserted in place, the height position of the corbel 20 is correct. At this time, the locking of the corbel 20 and the force plate 121 is released, and the corbel 20 is moved along the adjustment hole to be close to the warehouse wall, and then the corbel 20 is fastened to the embedded part with bolts. In this step, the guide structure 60 is first disassembled, and then the corbel 20 is fixedly installed. During the installation of the corbel 20, the upper centering component 50 and the lower centering component 50 form a pre-positioning of the corbel 20 installation process.

[0069] S4. Place the steel truss 10 on the corbel 20, and then use bolts to fix the support plate 22 and the lap plate through the adjustment hole position, then adjust the position of the clamping block 42 of the locking assembly 40 on the corbel 20 so that the clamping block 42 abuts against the rack 41 fixed on the load-bearing plate 121, and then tighten the rotating seat 44 of the locking assembly 40 with bolts and tighten the push rod 43 with a locking nut, so that the locking assembly 40 locks the corbel 20 and the radiation beam 12 to prevent the two from relative rotation or movement.

[0070] S5. Install the formwork 200 on the steel truss 10, tie the steel bars, and then cast the silo roof. When casting, follow the principle of bottom-up first, first cast the lower ring beam 101 connected to the silo wall, then cast the conical shell 102, and finally cast the silo roof center 103; specifically, the lower ring beam 101 is cast in 3 times, and a car pump is used to cast along the circumference of the ring beam. The first casting is 300mm and vibrated to make it dense; wait for 45 minutes before casting the second layer, cast 300mm and vibrate to make it dense; wait for 45 minutes before casting the third layer of ring beam and overlap with the first circle casting position of the circular cone shell, and then cast the conical shell plate upward in sequence. During the pouring process of the conical shell concrete, in order to make the steel truss 10 evenly and slowly stressed, it is poured in multiple rings (9 rings as shown in the figure, that is, 9 circles), and the next ring is poured before the joint begins to set, and the pouring is carried out in sequence (the pouring sequence is as shown in the figure, first pouring the outer ring, and then pouring to the inner ring in sequence, that is, ①→②→③→④→⑤→⑥→⑦→⑧→⑨, forming in one time), to the flat surface 103 of the center of the silo top. After the conical shell surface is poured, it is promptly calendered and finished.

[0071] During the lifting process of the support system of the present embodiment, the centering assembly 50 automatically aligns the steel truss 10 and ensures that the lifted body formed by the corbels 20 will not hit the warehouse wall. Therefore, the lifting speed during the lifting process can be increased, and the frequency of stopping for inspection before lifting to the right position is also reduced, thereby greatly shortening the lifting time. During the lifting process, the steel truss 10 is automatically adjusted by the upper centering assembly 50 and the lower centering assembly 50, thereby avoiding the steel truss 10 hitting the warehouse wall during the lifting process.

[0072] In addition, during the lifting process of the steel truss 10, the corbel 20 is connected and fixed to the load-bearing plate 121 and is lifted synchronously with the steel truss 10. After being lifted to the corresponding height, the corbel 20 only needs to be slid relative to the steel truss 10 to push the corbel 20 toward the warehouse wall. In this process, the centering assembly 50 forms a pre-positioning for the corbel 20 and provides support for the corbel 20, which reduces the force required for manually lifting the corbel 20, thereby improving the installation efficiency of the corbel 20 while reducing the labor intensity of installation.

[0073] With the cooperation of the centering assembly 50 and the guide structure 60 , the entire steel truss 10 can be automatically adjusted along the guide structure 60 at the final position where it is about to move into place, thereby improving the efficiency and accuracy of the adjustment and reducing the difficulty of the adjustment.

[0074] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An overhead large-diameter shallow circular silo conical silo roof support system, comprising a steel truss and a bracket for fixing on the silo wall, wherein the steel truss comprises an inner cavity tube formed by a steel frame and a plurality of radiation beams welded on the inner cavity tube, each radiation beam is connected with a lower chord and a support rod, one end of the support rod is fixed to the bottom of the inner cavity tube, and the other end is fixed to the middle of the radiation beam; one end of the lower chord is fixed to the end of the radiation beam, and the other end is fixed to the bottom of the inner cavity tube, the overall structure formed by the radiation beam and the support rod is umbrella-shaped, the end of the radiation beam connected to the inner cavity tube is high, and the end connected to the lower chord is low, characterized in that: A reinforcing rod is fixed on each radiation beam. There are multiple reinforcing rods, which are distributed along the length direction of the radiation beam. Each reinforcing rod connects two adjacent radiation beams.

2. The overhead large-diameter shallow circular silo conical silo roof support system according to claim 1 is characterized by: The corbel is provided with three pairs of connection holes distributed along the height direction, and the connection holes are used to align with the threaded tubes embedded in the wall of the circular warehouse. One pair of connection holes is located above the overlapping surface of the corbel and the radiation beam, and the remaining two pairs of connection holes are located below the overlapping surface of the corbel and the radiation beam.

3. The overhead large-diameter shallow circular silo conical silo roof support system according to claim 2 is characterized by: A stress-bearing plate is fixed at the end of the radiation beam of the steel truss, and the stress-bearing plate is used to be placed on the support plate on the corbel. A plurality of matching holes are provided on the stress-bearing plate, and a plurality of mounting holes are provided on the corbel. The matching holes and the mounting holes can correspond to each other, and the bolt connection between the corbel and the steel truss is realized through the matching holes and the mounting holes. The matching holes and / or the mounting holes are adjustment holes, and the adjustment holes can be adjusted when the angle of the steel truss is offset relative to the corbel.

4. The overhead large-diameter shallow circular silo conical silo roof support system according to claim 3 is characterized by: The mounting holes and the matching holes are both adjustment holes, and the adjustment holes on the force-bearing plate intersect with the adjustment holes on the supporting plate.

5. The overhead large-diameter shallow circular silo conical silo roof support system according to claim 4 is characterized in that: The length of the adjustment hole on the support plate and the length of the adjustment hole on the force plate are arranged along the circumference of the inner cavity tube, and the other is arranged along the radial direction of the inner cavity tube. The radially arranged adjustment hole can enable the mounting hole and the matching hole to be aligned and the bolts to be installed when the corbel is against the outer edge of the steel truss.

6. The overhead large-diameter shallow circular silo conical silo roof support system according to claim 4 is characterized by: The bracket is detachably connected with a locking assembly, which includes a rack, a clamping block, a push rod and a rotating seat. The rack is fixed on the force plate, and the clamping block is provided with a plurality of serrations inserted into the rack. The push rod is rotatably connected to the clamping block and can rotate relative to the clamping block. The push rod is threadedly connected to the rotating seat, and the insertion rod of the rotating seat is rotatably connected to the support plate. The insertion rod is provided with a thread, and the insertion rod can be locked on the bracket by a nut. The axial direction of the push rod is perpendicular to the axial direction of the insertion rod. The push rod is threadedly connected with a locking nut, and the locking nut is used to lock the position of the push rod on the rotating seat.

7. The overhead large-diameter shallow circular silo conical silo roof support system according to claim 5 is characterized by: The bull leg is detachably connected with a self-aligning assembly, which includes a mounting seat, an adjustment cover, an elastic member and a universal roller. The mounting seat is detachably connected to the bull leg, the adjustment cover is threadedly connected to the mounting seat, the sliding rod of the universal roller is slidably connected to the mounting seat, the sliding rod passes through the connecting hole and is coaxial with the connecting hole, a pressure sensor is arranged on the adjusting sleeve toward the bottom of the sliding rod, one end of the elastic member is used to abut against the sliding rod of the universal roller, and the other end is used to abut against the pressure sensor, and the universal roller is used to contact the warehouse wall.

8. The overhead large-diameter shallow circular silo conical silo roof support system according to claim 7 is characterized in that: The centering assembly includes an upper centering assembly and a lower centering assembly, both of which are installed on the connecting holes. The universal roller can be inserted into the threaded tube after the corbel is aligned with the embedded threaded tube. The upper centering assembly is close to the end of the radial beam of the steel truss, and the lower centering assembly is installed on the lowest connecting hole on the corbel.

9. The overhead large-diameter shallow circular silo conical silo roof support system according to claim 8 is characterized by: A guide structure is installed at at least two embedded positions, and an upper centering assembly is installed on the corbel corresponding to the embedded position with the guide structure. The guide structure includes a guide channel on which a mounting plate is fixed, and the mounting plate can be bolted to the embedded threaded tube. The guide channel is trumpet-shaped at one end facing the bottom of the silo, and a trigger is installed on the top of the guide channel. The universal roller of the upper centering assembly can trigger the trigger on the guide channel after moving to the top along the guide channel.

10. The overhead large-diameter shallow circular silo conical silo roof support system according to claim 9 is characterized in that: It also includes a controller, a trigger is connected to the controller, and after the trigger in the guide channel is triggered, the controller controls the lifting device to stop lifting.

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