Large-diameter storage silo liftable pre-assembled jig frame

Abstract

The application provides a large-diameter storage silo liftable pre-assembly jig. The large-diameter storage silo liftable pre-assembly jig is used for the jacking repair and pre-assembly operation of a large-diameter storage silo, and comprises a lifting support module used for lifting the pre-assembly jig body, and a circular placement table arranged below the pre-assembly jig body, wherein a plurality of gravity sensor installation grooves arranged in a ring array are arranged on the circular placement table, and the gravity sensor installation grooves are used for installing subsequent gravity sensor bodies. The large-diameter storage silo liftable pre-assembly jig provided by the application is used for the overall jacking, bottom corrosion repair, structure renovation, support base replacement and on-site pre-assembly operation of large-diameter silos in the grain storage, crude oil storage and chemical raw material storage industries, and is suitable for high-altitude, open-air and complex working condition construction of heavy-load, large-size and thin-wall steel silos.

Description

Technical Field

[0001] This invention belongs to the field of pre-assembly and lifting repair technology of large-scale storage equipment, and particularly relates to a liftable pre-assembly frame for large-diameter storage silos. Background Technology

[0002] Large-diameter steel storage silos are core storage facilities in the grain, oil, petroleum, and chemical industries. These types of equipment generally have typical structural characteristics such as large diameter, high overall weight, thin-walled steel structure, weak structural rigidity, and easy center of gravity shift. In scenarios such as on-site pre-assembly during the silo manufacturing stage, and bottom defect repair, anti-corrosion renovation, and base replacement during the operation stage, it is necessary to use a special lifting frame to lift the entire silo as a whole, so that the bottom of the silo is detached from the original support base, before subsequent construction operations can be carried out.

[0003] Currently, the traditional liftable pre-assembled jig structure in the industry is simple, relying solely on ordinary hydraulic cylinders and pneumatic cylinders as power components to achieve overall synchronous lifting. The control mode is crude, and it has several inherent technical defects in practical engineering applications, which seriously restrict construction safety, operation accuracy and production efficiency. The specific problems are as follows: Traditional silo frames lack specialized distributed gravity sensors, forcing operators to rely solely on visual observation of the silo's appearance and a simple handheld level to assess balance. This prevents real-time, quantitative data collection of the actual load at each support point. Uneven weight distribution in large-diameter silos, outdoor wind loads, and slight ground settlement can easily lead to hidden overloads and partial unloads at single points. These hazards cannot be manually identified, and prolonged operation with these issues will gradually damage the thin-walled structure of the silo.

[0004] Therefore, it is necessary to provide a new type of liftable pre-assembled frame for large-diameter storage silos to solve the above-mentioned technical problems. Summary of the Invention

[0005] The technical problem solved by this invention is to provide a liftable pre-assembly frame for large-diameter storage silos, which is suitable for overall lifting, bottom anti-corrosion repair, structural renovation, support base replacement and on-site pre-assembly operations for large-diameter silos in industries such as grain storage, crude oil reserves, and chemical raw material storage. It is applicable to high-altitude and open-air complex working conditions for heavy-duty, large-size thin-walled steel silos.

[0006] To address the aforementioned technical problems, this invention provides a liftable pre-assembly frame for large-diameter storage silos, used for lifting, repairing, and pre-assembly operations of large-diameter storage silos. It includes a lifting support module for lifting the pre-assembly frame body, a circular placement platform located below the pre-assembly frame body, and multiple gravity sensor mounting slots arranged in a ring array on the circular placement platform for installing subsequent gravity sensor bodies. Four bases are also included, with a hydraulic cylinder protective shell fixedly mounted on the top of each base. A hydraulic drive cylinder is fixedly mounted on the bottom inner wall of the hydraulic cylinder protective shell, and a lifting rod is fixedly mounted on the output end of each hydraulic drive cylinder. A rectangular driven block is fixedly fitted onto the lifting rod, with the bottom of the rectangular driven block contacting the top of the hydraulic cylinder protective shell. A cross-shaped top frame is provided between the four lifting rods, and four rectangular horizontal bars are fixedly mounted on the cross-shaped top frame, arranged in a rectangular array. Each rectangular horizontal bar is fixedly connected to two corresponding lifting rods.

[0007] As a further embodiment of the present invention, the lifting support module includes several parts: a hydraulic drive cylinder, a servo proportional valve, a displacement sensor, and a locking solenoid valve. The hydraulic drive cylinder serves as the lifting actuator. The servo proportional valve is used to precisely regulate the oil flow rate into and out of the cylinder, thereby controlling the lifting stroke and lifting rate. The displacement sensor is embedded inside the piston rod of the hydraulic cylinder, collecting the piston rod extension and retraction length in real time with an accuracy of ±0.01mm, and feeding the displacement data back to the edge computing main control module to form a load-displacement dual closed-loop control. The locking solenoid valve is used to lock the cylinder state in emergency situations to prevent the silo from accidentally falling. The lifting support module also includes a circular mounting shell, which is fixedly installed at the bottom of the "+" shaped top frame. The circular mounting shell is located above the pre-assembled jig body. The bottom of the circular mounting shell has an opening. A drive motor is fixedly installed on the top inner wall of the circular mounting shell. A threaded rod is fixedly installed on the output shaft of the drive motor. An internal threaded sleeve is threaded onto the threaded rod. Four hinge rods arranged in a circular array are hinged to the internal threaded sleeve. An arc-shaped top plate is hinged to the end of the hinge rod away from the internal threaded sleeve. The arc-shaped top plate is in contact with the inner wall of the pre-assembled jig body. Four hinge rods arranged in a circular array are hinged to the circular mounting shell. The end of the hinge rod away from the circular mounting shell is hinged to the corresponding arc-shaped top plate. A miniature pressure sensor is installed on one inner wall of the circular mounting shell.

[0008] As a further embodiment of the present invention, a PLC controller is detachably installed on one side of any cylinder protective housing. The PLC controller houses a gravity sensing system. The gravity sensing system includes a distributed gravity sensing component, a multi-channel data acquisition module, and an edge computing main control module, all electrically connected in sequence. The edge computing main control module is electrically connected to a load balancing calculation module, an adaptive closed-loop adjustment module, a wireless communication transmission module, and a three-level audible and visual warning module. The multi-channel data acquisition module is used to filter and reduce noise, perform analog-to-digital conversion, and encapsulate the original load signal. The edge computing main control module is configured with a self-test program. During the initialization phase, it performs fault self-tests on the sensing component, lifting module, and communication module. During the operation phase, it realizes "load acquisition—calculation..." The system employs a closed-loop automated control system encompassing "method analysis—deviation judgment—stroke correction—status feedback." The load balancing calculation module incorporates formulas for load balance, point-based load misalignment, and lifting stroke compensation. Based on real-time load data collected by distributed gravity sensors, it calculates the overall load balance of the silo and the deviation value of abnormal support points, outputting corresponding lifting stroke compensation commands. The adaptive closed-loop adjustment module, electrically connected to the lifting support module at its signal output end, receives compensation commands from the main control module and dynamically adjusts the lifting height and lifting rate of single / multiple lifting support modules. The three-level audible and visual warning module matches differentiated audible and visual alerts based on the load anomaly level, simultaneously providing local warnings and remote terminal push notifications.

[0009] As a further aspect of the present invention, the wireless communication transmission module in the gravity sensing system is configured to be compatible with 4G / 5G and LoRa dual communication modes. For close-range operations, LoRa low-power transmission mode is used, with a transmission distance of 0-200m; The long-distance remote monitoring uses 4G / 5G network transmission mode, which can synchronously upload real-time load data, lifting status and early warning information to cloud server and mobile control terminal. The system also reserves an RS485 wired interface for local wired connection in extreme network-free conditions.

[0010] As a further aspect of the present invention, the warning logic of the three-level audio-visual warning module in the gravity sensing system is as follows: Level 1 warning (green sound and light) corresponds to slight off-center loading / small deviation at a single point. It is only prompted locally, and the system will automatically perform fine-tuning and correction. Level 2 warning (yellow audible and visual warning) corresponds to moderate off-center load / multi-point anomaly, and the warning information is pushed to the remote control terminal simultaneously, allowing manual intervention to correct parameters; A Level 3 warning (red audible and visual alarm) corresponds to severe off-center loading, sensor failure, or cylinder malfunction. The system immediately suspends lifting operations, locks all lifting support modules, and sends an emergency alarm message.

[0011] As a further aspect of the present invention, any one of the gravity sensor bodies in the distributed gravity sensing components of the gravity sensing system includes a bearing plate, a high-strength sealed shell, a piezoelectric gravity sensor, a temperature compensation chip, a signal amplification circuit, and an overload buffer spring. The high-strength sealed outer shell is made of stainless steel integral die casting, and a piezoelectric gravity sensor is fixedly installed inside. An overload buffer spring is set at the top of the sensor, and the top of the buffer spring is connected to a bearing plate. The top surface of the bearing plate is in contact with the bottom of the storage silo. The temperature compensation chip is attached to the sidewall of the piezoelectric gravity sensor to compensate for the zero-point drift error of the sensor under high and low temperature environments, with a compensation accuracy range of ±0.3%FS. The gravity sensing component has a range of 0-500KN and a sampling frequency of 100-500Hz, which is suitable for heavy-duty jacking operations of large-diameter silos. As a further aspect of the present invention, the load balance calculation formula built into the load balance calculation module of the gravity sensing system is as follows: ; in, The current load balance of the silo, with a value range of 0-100%; n is the total number of lifting support modules and corresponding sensing components. For the first Real-time load values ​​collected by the gravity sensing components, in kN; The average load value for all sensing components is collected, in kN. when Load balance is determined when ≥95%, and ≤80% is considered balanced. <95% indicates a slight off-center load; 60% ≤ When the load is less than 80%, it is considered a moderate off-center load. If the load is less than 60%, it is considered a severe off-center load.

[0012] As a further aspect of the present invention, the point off-center load determination formula in the gravity sensing system is as follows:

[0013] in, For the first Load deviation rate at each support point; when -5% ≤ When the load is ≤5%, the load at the location is normal. When 5% < ≤15% or -15%≤ When the percentage is less than -5%, the location is considered to have a slight anomaly. When 15% < ≤30% or -30%≤ When the load is less than -15%, the location is determined to be either overloaded or unloaded. when >30% or When the value is less than -30%, the location is determined to be severely faulty, and an emergency warning is immediately triggered.

[0014] As a further aspect of the present invention, the formula for the lifting stroke compensation algorithm in the gravity sensing system is as follows:

[0015] in, Here is the stroke compensation value for the i-th lifting support module, in mm; This is a dynamic compensation coefficient, ranging from 0.8 to 1.2, which is adaptively adjusted according to the silo diameter specifications. This represents the load deviation rate at the corresponding point. The current reference lifting height of the lifting module is in mm. The compensation rule is to reduce the lifting stroke for points with larger loads and increase the lifting stroke for points with smaller loads, until the deviation rate of all points falls within the ±5% safe range.

[0016] Compared with related technologies, the large-diameter storage silo liftable pre-assembly frame provided by the present invention has the following advantages: This invention utilizes a ring array of gravity sensor bodies 308 to achieve full-area load acquisition at all support points, eliminating the outdated single-point detection and manual visual judgment methods of traditional equipment. Equipped with a piezoelectric gravity sensor, temperature compensation chip, and overload protection buffer structure, the device can accurately detect heavy loads from 0-500KN. Furthermore, under complex outdoor conditions such as high and low temperatures, dust, and instantaneous impacts, it can control temperature drift errors within ±0.3%FS. Combined with a ±0.01mm high-precision displacement sensor, it can comprehensively monitor the stress and lifting posture of the silo, and proactively identify hidden safety hazards such as single-point overload and partial vacancy.

[0017] This invention features a three-tiered differentiated audible and visual early warning system, providing graded responses for minor, moderate, and severe faults and off-center load conditions. In high-risk situations, it can automatically lock the hydraulic mechanism for hardware protection. Simultaneously, the device integrates three transmission methods: LoRa, 4G / 5G wireless communication, and RS485 wired communication, adaptable to various working conditions such as close-range on-site operations, long-distance remote monitoring, and remote environments without network access. Data and early warning information transmission are uninterrupted. The entire process of fault identification, response, and notification is automated, significantly improving fault diagnosis efficiency and reducing on-site manual inspection costs. Attached Figure Description

[0018] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the right-side cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the principle of the present invention; Figure 4 This is an exploded view of the gravity sensor body 308 in this invention.

[0020] In the diagram: 100. Pre-assembled jig body; 1. Base; 2. Hydraulic cylinder protective shell; 3. Hydraulic drive cylinder; 4. Lifting rod; 5. Rectangular driven block; 6. Cross-shaped top frame; 601. Rectangular horizontal bar; 200. Lifting support module; 7. Circular mounting shell; 8. Drive motor; 9. Threaded rod; 10. Internal threaded sleeve; 11. Hinge rod one; 12. Arc-shaped top plate; 13. Hinge rod two; 14. Miniature pressure sensor; 300. PLC controller; 301. Distributed gravity sensing component; 302. Multi-channel data acquisition module; 303. Edge computing main control module; 304. Load balancing calculation module; 305. Adaptive closed-loop adjustment module; 306. Wireless communication transmission module; 307. Three-level sound and light warning module; 308. Gravity sensor body; 3081. Bearing pressure plate; 3082. High-strength sealed housing; 3083. Piezoelectric gravity sensor; 3084. Temperature compensation chip 3084; 3085. Overload buffer spring; 400. Circular placement platform. Detailed Implementation

[0021] Please refer to the following: Figure 1 and Figure 4 ,in, Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the right-side cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the principle of the present invention; Figure 4 This is an exploded view of the gravity sensor body 308 in this invention. The large-diameter storage silo liftable pre-assembly frame is used for lifting, repairing, and pre-assembly operations of the large-diameter storage silo. It includes a lifting support module 200 that drives the pre-assembly frame body 100 to complete the lifting action. A circular placement platform 400 is provided below the pre-assembly frame body 100. Multiple gravity sensor mounting slots arranged in a ring array are machined on the surface of the circular placement platform 400. These slots serve as dedicated installation stations for placing the gravity sensor body 308, achieving the standardized positioning and installation of the full-area load acquisition component.

[0022] The equipment foundation support and lifting execution unit are equipped with four sets of bases 1. Each base 1 has a hydraulic cylinder protective shell 2 fixedly installed on its top. The hydraulic cylinder protective shell 2 can prevent dust, rainwater and debris from the construction site from entering the internal hydraulic components, while improving the overall structural stability. The bottom inner wall of the hydraulic cylinder protective shell 2 is fixedly equipped with a hydraulic drive cylinder 3. The output end of the hydraulic drive cylinder 3 is connected to the lifting rod 4. A rectangular follower block 5 is fixedly installed on the outside of the lifting rod 4. The bottom of the rectangular follower block 5 is normally in contact with the top end face of the hydraulic cylinder protective shell 2 to limit the lowest fall position of the lifting rod 4 and prevent the hydraulic cylinder from overtraveling and retracting.

[0023] The upper ends of the four sets of lifting rods 4 are connected to the same set of cross-shaped top frame 6. Four rectangular horizontal bars 601 are fixed on the cross-shaped top frame 6. The four rectangular horizontal bars 601 are distributed in a rectangular array. The two ends of each rectangular horizontal bar 601 are fixedly connected to the two adjacent lifting rods 4, so that the four sets of lifting rods 4 are linked as a whole, ensuring the integrity of the lifting structure and the uniformity of force.

[0024] The lifting support module 200 consists of a hydraulic drive cylinder 3, a servo proportional valve, a displacement sensor, and a locking solenoid valve. The hydraulic drive cylinder 3 is the core lifting actuator; the servo proportional valve precisely controls the flow rate and velocity of the hydraulic fluid entering and exiting the cylinder, finely controlling the cylinder's lifting stroke and overall lifting rate to adapt to different operating conditions; the displacement sensor, embedded in the piston rod of the hydraulic drive cylinder, can continuously collect the piston rod's extension and retraction length in real time, with an accuracy of ±0.01mm. The displacement data is transmitted back to the edge computing main control module 303 in real time, forming a load-displacement dual closed-loop control system combined with load data, significantly improving lifting control accuracy; the locking solenoid valve is an emergency protection component. When the system identifies an emergency condition, it can immediately lock the hydraulic circuit, fixing the working state of the hydraulic drive cylinder 3 and eliminating the risk of the silo accidentally falling.

[0025] The lifting support module 200 is also equipped with a circular mounting shell 7. The circular mounting shell 7 is fixedly installed at the bottom of the "+" shaped top frame 6 and located above the pre-assembled jig body 100. The bottom of the circular mounting shell 7 has an opening, and the drive motor 8 is fixedly installed on the inner wall of its top. The output shaft of the drive motor 8 is fixedly connected to the threaded rod 9. The threaded rod 9 is fitted with an inner threaded sleeve 10 through a threaded structure. When the threaded rod rotates, it can drive the inner threaded sleeve 10 to perform axial linear reciprocating motion. Four hinge rods 11 arranged in a circular array are hinged to the outer wall of the internal threaded sleeve 10. The end of the hinge rod 11 away from the internal threaded sleeve 10 is hinged to an arc-shaped top plate 12. The outer arc surface of the arc-shaped top plate 12 contacts the inner wall of the pre-assembled jig body 100. Four hinge rods 13 arranged in a circular array are also hinged to the outer side of the circular mounting shell 7. The other end of the hinge rod 13 is hinged to the corresponding arc-shaped top plate 12. The hinge rods 11 and 13 form a linkage transmission mechanism to realize the radial expansion and contraction of the arc-shaped top plate 12. A miniature pressure sensor 14 is installed on one side of the inner wall of the circular mounting shell 7 to detect the pressing pressure of the arc-shaped top plate 12 on the inner wall of the jig body and determine the positioning and clamping status. During operation, the positioning is first completed by pressing the inner wall of the pre-assembled jig body 100 with the arc-shaped top plate 12, and then the lifting mechanism is started to complete the overall lifting.

[0026] A PLC controller 300 can be detachably installed on the outside of any hydraulic cylinder protective housing 2. The PLC controller 300 integrates a complete gravity sensing system. The hardware link of this system consists of a distributed gravity sensing component 301, a multi-channel data acquisition module 302, and an edge computing main control module 303. The edge computing main control module 303 is also electrically connected to a load balancing calculation module 304, an adaptive closed-loop adjustment module 305, a wireless communication transmission module 306, and a three-level audible and visual early warning module 307, forming a complete link of "signal acquisition - data processing - algorithm calculation - closed-loop control - early warning transmission".

[0027] Parameter presets: The sampling frequency of the sensing component is set to 300Hz, and the real-time temperature compensation function is enabled; the displacement sensor calibration accuracy is set to ±0.01mm; the dynamic compensation coefficient k is set to 1.0 according to the silo diameter in this embodiment; the communication mode defaults to enabling LoRa transmission for short distances and 4G / 5G transmission for long distances, while also providing an RS485 wired backup interface; the hydraulic system servo proportional valve and lock-up solenoid valve complete the oil circuit calibration; The multi-channel data acquisition module 302 primarily preprocesses the raw load electrical signals transmitted by the distributed gravity sensing component 301, performing filtering and noise reduction, analog-to-digital conversion, and data format encapsulation to eliminate noise generated by electromagnetic interference and mechanical vibration, ensuring the accuracy and validity of the load data. The edge computing main control module 303 has a built-in dedicated operation self-test program. During the equipment startup initialization phase, it automatically completes a full-dimensional fault self-test of the sensing component, lifting module, and communication module. During the formal operation phase, it continuously executes a closed-loop automated control process encompassing load acquisition, algorithm analysis, deviation determination, stroke correction, and status feedback.

[0028] The load balancing calculation module 304 is preloaded with three sets of dedicated calculation formulas, which can calculate the overall load balance of the silo and the load deviation value of the support points based on real-time load data, and output the lifting stroke compensation command; the adaptive closed-loop adjustment module 305 is electrically connected to the drive mechanism of each group of lifting support modules at its signal output end, receives the compensation command issued by the main control module, and dynamically adjusts the lifting height and lifting rate of one or more groups of lifting support modules; the three-level sound and light warning module 307 outputs differentiated sound and light signals according to the load anomaly level, and simultaneously completes local warning and remote terminal information push.

[0029] The 306 wireless communication transmission module is compatible with both 4G / 5G mobile communication networks and LoRa low-power wireless transmission modes: For close-range field operations, LoRa transmission mode is used, with an effective transmission distance of 0-200m, featuring low power consumption and strong anti-interference capabilities; for long-range remote monitoring scenarios, it switches to 4G / 5G networks, synchronously uploading real-time load data, lifting and lowering operation status, and early warning information to the cloud server and mobile control terminal. The system also includes an RS485 wired interface, enabling local device connection and data exchange in extreme conditions such as no wireless network in the field or interrupted wireless signals, ensuring uninterrupted equipment operation.

[0030] The Level 3 Audio-Visual Early Warning Module 307 is configured with graded response logic based on the severity of the fault: Level 1 warning (green sound and light): This corresponds to minor off-center loading or small single-point load deviation. Only a local warning signal is issued, and the system automatically performs fine-tuning and correction while the operation continues. Level 2 warning (yellow audible and visual warning): This corresponds to moderate off-center load and abnormal load at multiple points. While providing local audible and visual warnings, it also pushes warning information to the remote control terminal, supporting manual intervention to correct operating parameters. Level 3 warning (red audible and visual alarm): In response to high-risk conditions such as heavy off-center loading, sensor failure, or hydraulic cylinder malfunction, the system immediately suspends all lifting operations, locks all lifting support modules, and sends the highest level emergency alarm information.

[0031] The gravity sensor body 308 in the distributed gravity sensing component 301 is the core unit for load acquisition. It consists of a bearing plate 3081, a high-strength sealed shell 3082, a piezoelectric gravity sensor 3083, a temperature compensation chip 3084, a signal amplification circuit, and an overload buffer spring 3085. The high-strength sealed shell 3082 is made of stainless steel through die casting, which is dustproof, waterproof, corrosion-resistant, and impact-resistant, making it suitable for complex outdoor working conditions. The piezoelectric gravity sensor 3083 is fixed inside the shell, and an overload buffer spring 3085 is set at the top of the sensor to buffer instantaneous impact loads and protect the sensor from damage. The top of the buffer spring is connected to the bearing plate 3081, and the top surface of the bearing plate 3081 is attached to the bottom of the storage silo to accurately transfer the load. The temperature compensation chip 3084 is attached to the side wall of the piezoelectric gravity sensor 3083 to compensate for the zero-point drift error of the sensor caused by high and low temperature environments, with a compensation accuracy of ±0.3%FS. The sensor component has a rated range of 0-500KN, a signal sampling frequency of 100-500Hz, a fast response speed, and a large load-bearing capacity, making it fully suitable for heavy-duty jacking conditions of large-diameter silos.

[0032] The gravity sensing system has built-in calculation formulas and judgment rules: Load balance calculation formula: ; In the formula: The current load balance of the silo, with a value range of 0-100%; n is the total number of lifting support modules and corresponding sensing components. For the first Real-time load values ​​collected by the gravity sensing components, in kN; The average load value for all sensing components is collected, in kN. when Load balance is determined when ≥95%, and ≤80% is considered balanced. <95% indicates a slight off-center load; 60% ≤ When the load is less than 80%, it is considered a moderate off-center load. If the load is less than 60%, it is considered a severe off-center load.

[0033] (2) Formula for determining off-center load at a location: : In the formula: For the first Load deviation rate at each support point; when -5% ≤ When the load is ≤5%, the load at the location is normal. When 5% < ≤15% or -15%≤ When the percentage is less than -5%, the location is considered to have a slight anomaly. When 15% < ≤30% or -30%≤ When the load is less than -15%, the location is determined to be either overloaded or unloaded. when >30% or When the value is less than -30%, the location is determined to be severely faulty, and an emergency warning is immediately triggered.

[0034] Formula for lifting stroke compensation algorithm:

[0035] In the formula: Here is the stroke compensation value for the i-th lifting support module, in mm; This is a dynamic compensation coefficient, ranging from 0.8 to 1.2, which is adaptively adjusted according to the silo diameter specifications. This represents the load deviation rate at the corresponding point. The current reference lifting height of the lifting module is in mm. The compensation rule is to reduce the lifting stroke for points with larger loads and increase the lifting stroke for points with smaller loads, until the deviation rate of all points falls within the ±5% safe range.

[0036] After the equipment is assembled and wired, power it on and perform a self-test. Once all modules—sensing, hydraulics, communication, and early warning—are confirmed to be operating normally, it can be put into on-site operation. This embodiment of the equipment is suitable for conventional construction sites with high and low temperatures, strong winds, and high dust levels, as well as remote locations without network access, relying on an RS485 wired interface for normal operation. The overall structural strength, detection accuracy, and control logic all meet the requirements for the entire process of lifting, pre-assembly, and repairing large-diameter steel silos.

[0037] The working principle of the large-diameter storage silo liftable pre-assembly frame provided by this invention is as follows: After the equipment is powered on, the edge computing main control module 303 automatically runs a self-test program, sequentially checking the operating status of the distributed gravity sensing component 301, the lifting support module 200, the wireless communication transmission module 306, and the three-level audible and visual early warning module 307, and verifying whether the sensor signals, hydraulic circuits, communication links, and early warning outputs are normal. If a component failure is detected, the equipment immediately issues an early warning and locks operation, prompting personnel to perform maintenance; after all components pass the self-test, the equipment enters standby mode.

[0038] The large-diameter storage silo to be constructed is hoisted onto the circular placement platform 400, ensuring that the bottom of the silo is fully in contact with the bearing pressure plate 3081 of the gravity sensor body 308, guaranteeing normal load transmission. The drive motor 8 is started, driving the threaded rod 9 to rotate, which in turn drives the internal threaded sleeve 10 to move axially. Through the linkage mechanism composed of hinge rod 11 and hinge rod 13, the arc-shaped top plate 12 is pushed outward to tighten against the inner wall of the pre-assembled jig body 100. The miniature pressure sensor 14 monitors the tightening pressure in real time. Once the pressure reaches the preset threshold, the drive motor 8 stops, completing the jig positioning and clamping, and preventing the jig from shifting during the lifting process.

[0039] After the silo is positioned and clamped, all gravity sensor bodies 308 synchronously start load acquisition. The piezoelectric gravity sensor 3083 outputs the raw electrical signal, and the temperature compensation chip 3084 compensates for the detection error caused by the ambient temperature in real time. The raw signal is transmitted to the multi-channel data acquisition module 302, and after filtering, analog-to-digital conversion and data encapsulation, the standard digital signal is transmitted to the edge computing main control module 303.

[0040] After the operator issues the lifting command, the hydraulic cylinder 3 extends, driving the lifting rod 4 and the "+" shaped top frame 6 to rise, achieving overall lifting of the silo. Displacement sensors collect the cylinder extension and retraction lengths in real time, forming a displacement monitoring link. During operation, the load balancing calculation module 304 continuously calls the load data, calculating the overall silo balance and load deviation rate at each point using built-in formulas. Once a load deviation is detected, it immediately calculates the stroke compensation value and sends the compensation command to the adaptive closed-loop adjustment module 305. The module controls the servo proportional valve to adjust the oil supply to the corresponding hydraulic cylinder. Points with excessive loads have a reduced lifting stroke, while points with insufficient loads have a increased lifting stroke, dynamically correcting the lifting height and rate. The system cyclically executes the "collection-calculation-compensation-adjustment" process until the load deviation rate at all points is controlled within the ±5% safety range, achieving full-process load-displacement dual closed-loop automatic leveling.

[0041] Throughout the operation, the 307 three-level audible and visual early warning module receives real-time operating condition judgment signals and responds to various anomalies in a tiered manner: a slight off-center load triggers a level one green warning, and the system automatically makes minor adjustments; a moderate off-center load triggers a level two yellow warning, and information is simultaneously pushed to the remote terminal; in the event of severe off-center load, cylinder failure, sensor failure, or other high-risk problems, a level three red warning is triggered, the locking solenoid valve immediately locks the hydraulic circuit, the equipment stops lifting and lowering, and an emergency alarm is pushed. The wireless communication module automatically switches the transmission mode according to the operating distance, switching to RS485 wired transmission in extreme network-free conditions to ensure uninterrupted transmission of data and early warning information.

[0042] After the bottom inspection and pre-assembly of the silo are completed, the staff issues a lowering command, and the lifting support module 200 slowly lowers in sync until the rectangular driven block 5 is in contact with the top of the hydraulic cylinder protective shell 2, and the hydraulic cylinder completes its retraction. Then, the drive motor 8 is started in reverse, driving the arc-shaped top plate 12 to retract inward, releasing the clamping state of the jig; after the silo is lifted off the equipment, the entire jig returns to its initial standby state, completing a single operation cycle.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments, or they can be used directly or indirectly, without departing from the principles and spirit of the invention. In other related technical fields, the scope of the invention is defined by the appended claims and their equivalents, and they are similarly included within the scope of patent protection of the invention.

Claims

1. A liftable pre-assembly frame for large-diameter storage silos, used for lifting, repairing and pre-assembly operations of large-diameter storage silos, comprising a lifting support module for lifting the pre-assembly frame body, characterized in that: it further comprises a circular placement platform disposed below the pre-assembly frame body, the circular placement platform being provided with multiple gravity sensor mounting slots arranged in a ring array, the gravity sensor mounting slots being used for installing subsequent gravity sensor bodies; Four bases, with a cylinder protective shell fixedly installed on the top of each base, a hydraulic drive cylinder fixedly installed on the bottom inner wall of the cylinder protective shell, a lifting rod fixedly installed on the output end of the hydraulic drive cylinder, and a rectangular follower block fixedly sleeved on the lifting rod, with the bottom of the rectangular follower block in contact with the top of the cylinder protective shell; A cross-shaped top frame is provided between the four lifting rods. Four rectangular horizontal bars are fixedly installed on the cross-shaped top frame. The four rectangular horizontal bars are distributed in a rectangular array. The rectangular horizontal bars are fixedly connected to the corresponding two lifting rods.

2. The liftable pre-assembled frame for large-diameter storage silos according to claim 1, characterized in that: The lifting support module includes several parts: a hydraulic drive cylinder, a servo proportional valve, a displacement sensor, and a lock-up solenoid valve. The hydraulically driven cylinder serves as a lifting actuator; Servo proportional valves are used to precisely regulate the flow of oil entering and leaving the hydraulic cylinder, thereby controlling the lifting stroke and lifting rate. The displacement sensor is embedded inside the piston rod of the hydraulic cylinder to collect the extension and retraction length of the piston rod in real time with an accuracy of ±0.01mm. The displacement data is then fed back to the edge computing main control module to form a dual closed-loop control of load and displacement. The locking solenoid valve is used to lock the cylinder in emergency situations to prevent the silo from falling accidentally. The lifting support module also includes a circular mounting shell, which is fixedly installed at the bottom of the "+" shaped top frame and located above the pre-assembled jig body. The bottom of the circular mounting shell has an opening, and a drive motor is fixedly installed on the inner wall of the top of the circular mounting shell. A threaded rod is fixedly installed on the output shaft of the drive motor, and an internal threaded sleeve is threaded onto the threaded rod. Four hinge rods (first type) arranged in a circular array are hinged to the internal threaded sleeve. An arc-shaped top plate is hinged to the end of the hinge rod (first type) away from the internal threaded sleeve. The arc-shaped top plate is in contact with the inner wall of the pre-assembled jig body. Four hinge rods (second type) arranged in a circular array are hinged to the circular mounting shell. The end of the hinge rod (second type) away from the circular mounting shell is hinged to the corresponding arc-shaped top plate. A miniature pressure sensor is installed on one inner wall of the circular mounting shell.

3. The liftable pre-assembled frame for large-diameter storage silos according to claim 1, characterized in that: A PLC controller is detachably installed on one side of the protective shell of any hydraulic cylinder, and the PLC controller is equipped with a gravity sensing system. The gravity sensing system includes a distributed gravity sensing component, a multi-channel data acquisition module, and an edge computing main control module that are electrically connected in sequence. The edge computing main control module is electrically connected to a load balancing calculation module, an adaptive closed-loop adjustment module, a wireless communication transmission module, and a three-level sound and light early warning module; The multi-channel data acquisition module is used to perform filtering and noise reduction, analog-to-digital conversion, and signal encapsulation on the original load signal. The edge computing main control module is configured with a self-test program. During the initialization phase, it completes the fault self-test of the sensing components, lifting module, and communication module. During the operation phase, it realizes closed-loop automated control of "load acquisition - algorithm analysis - deviation judgment - stroke correction - status feedback". The load balancing calculation module is equipped with a built-in load balance calculation formula, point off-center load judgment formula, and lifting stroke compensation algorithm formula. It can calculate the overall load balance of the silo and the deviation value of abnormal support points based on the real-time load data collected by the distributed gravity sensing component, and output the corresponding lifting stroke compensation command. The adaptive closed-loop adjustment module is used to electrically connect the signal output terminal to the lifting support module, and is used to receive compensation commands issued by the main control module to dynamically adjust the lifting height and lifting rate of a single or multiple lifting support modules. The three-level audio-visual early warning module matches differentiated audio-visual prompt signals according to the load anomaly level, and simultaneously completes local early warning and remote terminal push.

4. The liftable pre-assembled frame for large-diameter storage silos according to claim 3, characterized in that: The wireless communication transmission module in the gravity sensing system is compatible with both 4G / 5G and LoRa dual communication modes. For close-range operations, LoRa low-power transmission mode is used, with a transmission distance of 0-200m; The long-distance remote monitoring uses 4G / 5G network transmission mode, which can synchronously upload real-time load data, lifting status and early warning information to cloud server and mobile control terminal. The system also reserves an RS485 wired interface for local wired connection in extreme network-free conditions.

5. The liftable pre-assembled frame for large-diameter storage silos according to claim 3, characterized in that: The warning logic of the three-level audio-visual warning module in the gravity sensing system is as follows: Level 1 warning (green sound and light) corresponds to slight off-center loading / small deviation at a single point. It is only prompted locally, and the system will automatically perform fine-tuning and correction. Level 2 warning (yellow audible and visual warning) corresponds to moderate off-center load / multi-point anomaly, and the warning information is pushed to the remote control terminal simultaneously, allowing manual intervention to correct parameters; A Level 3 warning (red audible and visual alarm) corresponds to severe off-center loading, sensor failure, or cylinder malfunction. The system immediately suspends lifting operations, locks all lifting support modules, and sends an emergency alarm message.

6. The liftable pre-assembled frame for large-diameter storage silos according to claim 3, characterized in that: Any gravity sensor body in the distributed gravity sensing component of the gravity sensing system includes a bearing pressure plate, a high-strength sealed shell, a piezoelectric gravity sensor, a temperature compensation chip, a signal amplification circuit, and an overload buffer spring. The high-strength sealed outer shell is made of stainless steel integral die casting, and a piezoelectric gravity sensor is fixedly installed inside. An overload buffer spring is set at the top of the sensor, and the top of the buffer spring is connected to a bearing plate. The top surface of the bearing plate is in contact with the bottom of the storage silo. The temperature compensation chip is attached to the sidewall of the piezoelectric gravity sensor to compensate for the zero-point drift error of the sensor under high and low temperature environments, with a compensation accuracy range of ±0.3%FS. The gravity sensing component has a range of 0-500KN and a sampling frequency of 100-500Hz, making it suitable for heavy-duty jacking operations of large-diameter silos.

7. The liftable pre-assembled frame for large-diameter storage silos according to claim 3, characterized in that: The load balance calculation formula built into the load balance calculation module of the gravity sensing system is as follows: ； in, The current load balance of the silo, with a value range of 0-100%; n is the total number of lifting support modules and corresponding sensing components. For the first Real-time load values ​​collected by the gravity sensing components, in kN; The average load value for all sensing components is collected, in kN. when Load balance is determined when ≥95%, and ≤80% is considered balanced. <95% indicates a slight off-center load; 60% ≤ When the load is less than 80%, it is considered a moderate off-center load. If the load is less than 60%, it is considered a severe off-center load.

8. The liftable pre-assembled frame for large-diameter storage silos according to claim 3, characterized in that: The point off-center load determination formula in the gravity sensing system is as follows: ； in, For the first Load deviation rate at each support point; when -5% ≤ When the load is ≤5%, the load at the location is normal. When 5% < ≤15% or -15%≤ When the percentage is less than -5%, the location is considered to have a slight anomaly. When 15% < ≤30% or -30%≤ When the load is less than -15%, the location is determined to be either overloaded or unloaded. when >30% or When the value is less than -30%, the location is determined to be severely faulty, and an emergency warning is immediately triggered.

9. The liftable pre-assembled frame for large-diameter storage silos according to claim 1, characterized in that: The formula for the lifting stroke compensation algorithm in the gravity sensing system is as follows: ； in, Here is the stroke compensation value for the i-th lifting support module, in mm; This is a dynamic compensation coefficient, ranging from 0.8 to 1.2, which is adaptively adjusted according to the silo diameter specifications. This represents the load deviation rate at the corresponding point. The current reference lifting height of the lifting module is in mm. The compensation rule is to reduce the lifting stroke for points with larger loads and increase the lifting stroke for points with smaller loads, until the deviation rate of all points falls within the ±5% safe range.

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