Hanging structure unsupported modular installation device and method

Abstract

The invention discloses a supporting-free modular mounting device and method for a hanging structure, and the device comprises a detachable lifting lug assembly which comprises at least one pair of U-shaped plates, the U-shaped plates are clamped and fixed to the lower flange of a steel beam, and a connecting plate capable of being transversely adjusted is connected between the U-shaped plates; the laser ranging system comprises a laser range finder and a wireless data transmission module which are arranged on each hanging structure, and each range finder measures the distance in real time by taking the lower flange of the steel beam as a reference surface; the electric hoist synchronous control system comprises a plurality of electric hoists, a PLC (Programmable Logic Controller) and a human-computer interaction interface, wherein the lower portion of the connecting plate and the hanging structure are provided with corresponding lifting lugs, the lifting lugs are connected through electric hoists, and the laser ranging system monitors the distance between the hanging structure and the steel beam in real time and feeds back the distance to the PLC to achieve closed-loop control. The device has the advantages of high construction speed, convenience in mounting and dismounting, good lifting synchronism, low construction measure cost, high mounting precision and the like.

Description

Technical Field

[0001] This invention relates to the field of building steel structure technology, and more specifically to a modular installation device and method for unsupported suspended structures. Background Technology

[0002] With the continuous development of the steel structure industry, the proportion of steel structures in public buildings is increasing. To meet the demand for large spaces, large-span frame structures are often used. At the same time, to enrich the functionality of buildings, suspended structures are introduced, using distributed hanging columns to support the structural weight, fully utilizing the mechanical properties of steel, thereby increasing the structural span and reducing material usage, providing good seismic performance and reducing steel consumption.

[0003] There are generally two construction methods for suspended structures. The first is the method of directly hoisting the structure after erecting supports. In this case, the suspended structure is constructed before the superstructure, resulting in a lack of reliable connection at the top of the suspended structure and making it difficult to guarantee installation accuracy. Furthermore, the suspended structure can only be connected to the superstructure after its construction is completed, at which point the supporting structure can be removed. The second method is to install the superstructure first, and then erect supports to install the suspended structure. In this case, the superstructure is already installed, and the construction space for the suspended structure is limited, requiring side installation, which makes on-site construction more difficult.

[0004] In summary, the current construction methods for suspended structures mainly have the following problems: 1. Temporary supports need to be erected at the bottom of the suspended column, which is expensive, complicated to install and dismantle, involves a large amount of work at height, and poses a high safety risk.

[0005] 2. Conventional electric hoists can only be controlled at a single point via a switch, and improving synchronization relies on manual visual inspection, resulting in poor installation accuracy.

[0006] 3. For conventional suspended structures, lifting anchor points need to be welded to the upper structure beforehand at the hanging point. These anchor points must be removed after installation and cannot be reused.

[0007] Therefore, how to complete the construction of this suspended structure in a way that both improves construction accuracy and ensures on-site construction safety is a technical problem that urgently needs to be solved. Summary of the Invention

[0008] This invention provides a modular installation device and method for unsupported suspended structures. Through modular assembly, reusable and detachable lifting lug components, and a synchronous control system with real-time feedback from a laser rangefinder, it solves the problems of high temporary support costs, poor manual synchronization accuracy, and non-reusable welding anchor points in traditional construction, significantly reducing construction costs and safety risks, and improving installation accuracy and efficiency.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: a modular installation device for a suspended structure without support, comprising: The detachable lifting lug assembly includes at least one pair of U-shaped plates, which are clamped and fixed to the lower flange of the steel beam, and a laterally adjustable connecting plate is connected between the U-shaped plates; The laser ranging system includes a laser rangefinder and a wireless data transmission module mounted on each suspension structure; The electric hoist synchronous control system includes multiple electric hoists, a PLC controller, and a human-machine interface; The lower part of the connecting plate and the hanging structure are provided with corresponding lifting lugs, which are connected by an electric hoist. The laser ranging system monitors the distance between the hanging structure and the steel beam in real time and feeds it back to the PLC controller to achieve closed-loop control.

[0010] Furthermore, the U-shaped plate is clamped and fixed by an upper bolt group and a lower bolt group. The upper bolt group includes an upper bolt. A first locking nut is provided on the upper plate surface of the U-shaped plate. The upper bolt passes through the first locking nut and the upper plate surface of the U-shaped plate in sequence and then presses against the upper surface of the lower flange of the steel beam. The lower bolt assembly includes a lower bolt. A second locking nut is provided on the upper surface of the connecting plate. The lower bolt passes through the lower surface of the U-shaped plate and the connecting plate in sequence and is then screwed into the second locking nut to form a bidirectional asymmetric locking structure.

[0011] Furthermore, the lifting lugs on the suspension structure are connected with shackles for the installation of electric hoists.

[0012] Furthermore, the laser ranging system adopts the Bluetooth transmission protocol.

[0013] Furthermore, the electric hoist synchronous control system includes: Human-computer interaction layer: includes touch screen and Ethernet communication module; Control core layer: includes at least a PLC controller, intermediate relays, and contactor groups; The execution equipment layer consists of multiple electric hoists and their matching transmission devices; Data acquisition layer: includes sensors and limit switches installed on each electric hoist; The touch screen establishes a data connection with the PLC controller via Ethernet. The output of the PLC controller drives the electric hoist via a relay-contactor group. The feedback signals from each sensor form a closed-loop control circuit.

[0014] Furthermore, the PLC controller is equipped with a synchronous control algorithm, which automatically adjusts the output pulse frequency when the displacement difference between any two electric hoists exceeds a set threshold.

[0015] Furthermore, the threshold can be set on the touchscreen.

[0016] A modular construction method for unsupported suspended structures includes the following steps: Step 1: Complete the modular assembly of the hanging structure on the floor frame; Step 2: Install at least two sets of detachable lifting lug assemblies symmetrically on the lower flange of the steel beam; Step 3: Connect the lifting lug assembly to the hanging structure using an electric hoist; Step 4: Activate the laser ranging system and synchronous control system, and lift the suspension structure; Step 5: After lifting and positioning, weld the butt joint between the lifting column of the hoisting structure and the upper steel beam; Step 6: Remove the lifting lug assembly and grind the temporary lifting lugs. Construction is now complete.

[0017] Furthermore, in step four, the height difference between adjacent lifting columns is monitored in real time during the lifting process. When the difference exceeds the set threshold, the lifting is automatically paused and an alarm is triggered.

[0018] Furthermore, in step five, the butt weld is gas shielded and ultrasonic testing is performed within 24 hours after welding.

[0019] In summary, this invention addresses the construction of suspended structures. First, it modularly assembles the suspended structure panels to ensure the stability of the lifting units during construction. Then, detachable / adjustable lifting lugs are installed at the lower hanging points for easy disassembly after construction. Adjustments can be made for different steel beam cross-sections, and the lifting lugs are reusable. Real-time measurement data from a laser rangefinder, used to control the electric hoist's switch, improves the installation accuracy of the suspended structure. The lifting construction method also reduces the need for support measures, lowering construction costs. Furthermore, combined with the on-site construction process, the lower suspended structure can be constructed simultaneously with the upper structure, significantly shortening the construction period. Simultaneously, it effectively reduces construction safety risks, ensuring safe high-altitude operations, and yields significant social and economic benefits. Attached Figure Description

[0020] Figure 1 This is an isometric view of an embodiment of the present invention; Figure 2 This is an isometric view of a portion of the structure according to an embodiment of the present invention; Figure 3 This is a partial front view of an embodiment of the present invention; Figure 4 This is a partial structural side view of an embodiment of the present invention; Figure 5 This is a diagram of the synchronous control system for an electric hoist according to an embodiment of the present invention.

[0021] Labeling instructions: 1. Steel beam; 2. Suspension structure; 3. Stiffening plate; 4. U-shaped plate; 5. First locking nut; 6. Upper bolt; 7. Connecting plate; 8. Lower bolt; 9. Second locking nut; 10 / 11. Lifting lug; 12. Shackle; 13. Electric hoist; 14. Laser rangefinder. Detailed Implementation

[0022] The following is in conjunction with the appendix Figures 1 to 5 The specific implementation of the unsupported modular installation device and method for a hanging structure of the present invention will be described in further detail.

[0023] A modular, unsupported installation device for a suspended structure, comprising: The detachable lifting lug assembly includes at least one pair of U-shaped plates, which are clamped and fixed to the lower flange of the steel beam, and a laterally adjustable connecting plate is connected between the U-shaped plates; The laser ranging system includes a laser rangefinder and a wireless data transmission module mounted on each suspension structure; The electric hoist synchronous control system includes multiple electric hoists, a PLC controller, and a human-machine interface; The lower part of the connecting plate and the hanging structure are provided with corresponding lifting lugs, which are connected by an electric hoist. The laser ranging system monitors the distance between the hanging structure and the steel beam in real time and feeds it back to the PLC controller to achieve closed-loop control.

[0024] In this preferred embodiment, the U-shaped plate is clamped and fixed by an upper bolt group and a lower bolt group. The upper bolt group includes an upper bolt. A first locking nut is provided on the upper surface of the U-shaped plate. The upper bolt passes through the first locking nut and the upper surface of the U-shaped plate in sequence and then presses against the upper surface of the lower flange of the steel beam. The lower bolt assembly includes a lower bolt. A second locking nut is provided on the upper surface of the connecting plate. The lower bolt passes through the lower surface of the U-shaped plate and the connecting plate in sequence and is then screwed into the second locking nut to form a bidirectional asymmetric locking structure.

[0025] In this preferred embodiment, the lifting lugs on the suspension structure are connected with shackles for the installation of the electric hoist.

[0026] In this preferred embodiment, the laser ranging system uses the Bluetooth transmission protocol.

[0027] In this preferred embodiment, the electric hoist synchronous control system (see reference) Figure 5 (as shown), including: Human-computer interaction layer: includes touch screen and Ethernet communication module; Control core layer: includes at least a PLC controller, intermediate relays, and contactor groups; The execution equipment layer consists of multiple electric hoists and their matching transmission devices; Data acquisition layer: includes sensors and limit switches installed on each electric hoist; The touch screen establishes a data connection with the PLC controller via Ethernet. The output of the PLC controller drives the electric hoist via a relay-contactor group. The feedback signals from each sensor form a closed-loop control circuit.

[0028] In this preferred embodiment, the PLC controller is equipped with a synchronous control algorithm, which automatically adjusts the output pulse frequency when the displacement difference between any two electric hoists exceeds a set threshold.

[0029] In this preferred embodiment, the threshold can be set on the touchscreen.

[0030] A modular construction method for unsupported suspended structures includes the following steps: Step 1: Complete the modular assembly of the hanging structure on the floor frame; Step 2: Install at least two sets of detachable lifting lug assemblies symmetrically on the lower flange of the steel beam; Step 3: Connect the lifting lug assembly to the hanging structure using an electric hoist; Step 4: Activate the laser ranging system and synchronous control system, and lift the suspension structure; Step 5: After lifting and positioning, weld the butt joint between the lifting column of the hoisting structure and the upper steel beam; Step 6: Remove the lifting lug assembly and grind the temporary lifting lugs. Construction is now complete.

[0031] In this preferred embodiment, in step four, the height difference between adjacent lifting columns is monitored in real time during the lifting process. When the difference exceeds a set threshold, the lifting is automatically paused and an alarm is triggered.

[0032] In this preferred embodiment, in step five, the butt weld is gas shielded welding, and ultrasonic testing is performed within 24 hours after welding.

[0033] Specific Implementation Example: This embodiment of the invention pertains to a high-rise building project that employs a steel frame structure. Several mezzanine floors exist, and these mezzanine floors utilize a suspended structure. Given the tight construction schedule, to ensure the accuracy and timeliness of the suspended structure's installation, suitable construction methods must be considered.

[0034] like Figure 1 , Figure 2As shown, this embodiment of the invention includes an upper steel beam 1, a suspension structure 2, a stiffening plate 3, a U-shaped plate 4, a first locking nut 5, an upper bolt 6, a transverse connecting plate 7, a lower bolt 8, a second locking nut 9, a lifting lug 10 on the transverse connecting plate, a lifting lug 11 on the suspension structure, a shackle 12, an electric hoist 13, and a laser rangefinder 14. The U-shaped plate 4 is located at the lower flange of the upper steel beam 1, with one on each side, and one edge of the U-shaped plate 4 is flush with the stiffening plate 3. Bolt holes are opened at both the top and bottom of the U-shaped plate 4, and a first locking nut 5 is welded to each opening on the upper steel plate. The upper bolt 6 passes through the first nut 5 and the upper bolt hole of the U-shaped plate 4 in sequence, and is tightened against the upper surface of the lower flange of the upper steel beam 1. The transverse connecting plate 7 is located between the two U-shaped plates 4 and also has bolt holes on both sides. A second locking nut 9 is welded to each opening on the upper surface of the transverse connecting plate 7. The locking nut 9 is tightened by passing the lower bolt 8 through the bolt holes of the U-shaped plate 4, the transverse connecting plate 7, and the second locking nut 9 on the upper surface of the transverse connecting plate 7, and then abutting against the lower surface of the lower flange of the upper steel beam 1. Each column of the suspension structure 2 has a corresponding lifting lug 11 welded to the lifting lug 10 on the transverse connecting plate. The electric hoist 13 is connected by the lifting lug 10 on the transverse connecting plate and the shackle 12 on the lifting lug 11 on the column. The laser rangefinder 14 is fixed to the other side of the column of the suspension structure 2. The U-shaped plate 4 is made of Q345B steel plate with a thickness of not less than 20mm. The length of the transverse connecting plate 7 is adjustable from 300-800mm to accommodate steel beams of different cross-sectional dimensions. The electric hoist 13 is preferably of type CD1 with a rated load of 5t.

[0035] A modular construction method for unsupported suspended structures includes the following steps: Step 1: Adopt a suspended, unsupported modular assembly method; Step 2: Construct an assembly frame on the plate directly below the installation location of the suspended structure 2, and assemble the suspended structure 2 into multiple modules according to its structural characteristics; Step 3: Install U-shaped plate 4 and transverse connecting plate 7 in sequence at the hanging position of the upper steel beam 1. Fix them by first locking nut 5, second locking nut 9 and upper bolt 6 and lower bolt 8 on the connecting plate. Lifting lug 10 is provided on the lower side of the transverse connecting plate 7. Step 4: Also install lifting lugs 11 on the lifting column directly below the lifting lug 10 on the horizontal connecting plate; Step 5: Connect the electric hoist 13 between the lifting lug 10 on the horizontal connecting plate and the lifting lug 11 on the lifting column using the shackle 12; Step 6: Fix a laser rangefinder 14 on the opposite side of the lifting lug 11 on each column of the suspended structure 2, and transmit the measurement data to the computer in real time via Bluetooth; Step 7: The computer processes the real-time data and transmits it to the electric hoist synchronous control system to control the lifting height of each electric hoist 13 and lift it into position; Step 8: Weld the butt weld between the hanging structure 2 and the upper steel beam 1; Step 9: Remove the upper detachable lifting lug assembly and cut off the lifting lug 11 on the hanging column to complete the installation of the hanging structure 2.

[0036] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A modular installation device for a suspended structure without support, characterized in that, include: The detachable lifting lug assembly includes at least one pair of U-shaped plates, which are clamped and fixed to the lower flange of the steel beam, and a laterally adjustable connecting plate is connected between the U-shaped plates; The laser ranging system includes a laser rangefinder and a wireless data transmission module installed on each suspension structure. Each rangefinder measures the distance in real time with the lower flange of the steel beam as the reference plane. The electric hoist synchronous control system includes multiple electric hoists, a PLC controller, and a human-machine interface; The lower part of the connecting plate and the hanging structure are provided with corresponding lifting lugs, which are connected by an electric hoist. The laser ranging system monitors the distance between the hanging structure and the steel beam in real time and feeds it back to the PLC controller to achieve closed-loop control.

2. The unsupported modular installation device for the suspended structure according to claim 1, characterized in that: The U-shaped plate is clamped and fixed by an upper bolt group and a lower bolt group. The upper bolt group includes an upper bolt. A first locking nut is provided on the upper plate surface of the U-shaped plate. The upper bolt passes through the first locking nut and the upper plate surface of the U-shaped plate in sequence and then presses against the upper surface of the lower flange of the steel beam. The lower bolt assembly includes a lower bolt. A second locking nut is provided on the upper surface of the connecting plate. The lower bolt passes through the lower surface of the U-shaped plate and the connecting plate in sequence and is then screwed into the second locking nut to form a bidirectional asymmetric locking structure.

3. The unsupported modular installation device for the suspended structure according to claim 1, characterized in that: The lifting lugs on the suspension structure are connected with shackles for the installation of electric hoists.

4. The unsupported modular installation device for the suspended structure according to claim 1, characterized in that: The laser ranging system uses the Bluetooth transmission protocol.

5. The unsupported modular installation device for the suspended structure according to claim 1, characterized in that: The electric hoist synchronous control system includes: Human-computer interaction layer: includes touch screen and Ethernet communication module; Control core layer: includes at least a PLC controller, intermediate relays, and contactor groups; The execution equipment layer consists of multiple electric hoists and their matching transmission devices; Data acquisition layer: includes sensors and limit switches installed on each electric hoist; The touch screen establishes a data connection with the PLC controller via Ethernet. The output of the PLC controller drives the electric hoist via a relay-contactor group. The feedback signals from each sensor form a closed-loop control circuit.

6. The unsupported modular installation device for the suspended structure according to claim 5, characterized in that: The PLC controller is equipped with a synchronous control algorithm. When the displacement difference between any two electric hoists exceeds a set threshold, the output pulse frequency is automatically adjusted.

7. The unsupported modular installation device for suspended structures according to claim 6, characterized in that: The threshold can be set on the touchscreen.

8. The unsupported modular construction method for suspended structures according to any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Complete the modular assembly of the hanging structure on the floor frame; Step 2: Install at least two sets of detachable lifting lug assemblies symmetrically on the lower flange of the steel beam; Step 3: Connect the lifting lug assembly to the hanging structure using an electric hoist; Step 4: Activate the laser ranging system and synchronous control system, and lift the suspension structure; Step 5: After lifting and positioning, weld the butt joint between the lifting column of the hoisting structure and the upper steel beam; Step 6: Remove the lifting lug assembly and grind the temporary lifting lugs. Construction is now complete.

9. The unsupported modular construction method for suspended structures according to claim 8, characterized in that: In step four, the height difference between adjacent lifting columns is monitored in real time during the lifting process. When the difference exceeds the set threshold, the lifting is automatically paused and an alarm is triggered.

10. The unsupported modular construction method for the square hanging structure according to claim 8, characterized in that: In step five, the butt weld is gas shielded and ultrasonic testing is performed within 24 hours after welding.

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