Flexible anti-collision device for overall lifting of large-span steel truss and implementation method

Abstract

The invention discloses a flexible anti-collision device for overall lifting of a large-span steel net rack and an implementation method. The flexible anti-collision device comprises a guide rail frame, a guide cable fixing point, a flexible guide cable, a clamp, a guide wheel set, a collision early warning sensor, a laser range finder, a buffer device and a steel net rack body. The steel net rack body is arranged on the guide rail frame, a plurality of guide wheel sets are arranged on the guide rail frame at intervals, and a buffering device is installed between the guide wheel sets and the steel net rack body. The guide cable fixing point is used for connecting a flexible guide cable, and the other end of the flexible guide cable is firmly connected with a lower chord node of the steel truss main body through a clamp; a plurality of collision early warning sensors are mounted in the upper area of the steel truss main body, laser range finders are arranged in the peripheral area, and the laser range finders and the collision early warning sensors are connected with a computer control terminal, so that the steel truss can be safely, accurately and efficiently lifted to a designed position; the problem that in the prior art, a large-span steel net rack is prone to collision in the overall lifting process is solved.

Description

Technical Field

[0001] This invention relates to the field of building construction equipment technology, specifically to a flexible anti-collision device and implementation method for the overall lifting of a large-span steel space frame. Background Art

[0002] In modern construction engineering, large-span steel space frame structures are widely used in large public buildings such as stadiums, exhibition halls, and airport terminals due to their advantages such as good spatial stress performance, light weight, and convenient installation. During the installation of large-span steel space frames, the overall lifting technology is a commonly used and efficient construction method. It can lift the steel space frame assembled on the ground to the designed height before proceeding with subsequent installation and fixing work.

[0003] However, numerous technical challenges exist during the overall lifting of steel space frames. On one hand, due to their large size and heavy weight, steel space frames are susceptible to deviation during lifting due to factors such as wind force and lifting equipment errors. If their lifting trajectory cannot be effectively guided, the steel space frame may not be lifted into position, affecting subsequent installation accuracy, impacting structural quality, and potentially even causing safety accidents. On the other hand, the construction site environment is complex, and the steel space frame may collide with surrounding existing structures and construction equipment during lifting. Current anti-collision measures are often inadequate and cannot effectively prevent collisions in a timely manner. Therefore, developing a collision-prevention device for the overall lifting of large-span steel space frames is of significant practical importance. Summary of the Invention

[0004] The purpose of this invention is to provide a flexible anti-collision device and implementation method for the overall lifting of large-span steel space frames, ensuring that the steel space frame can be safely and accurately lifted to the design position and achieve high-precision installation, so as to solve the problem of collisions that easily occur during the overall lifting of large-span steel space frames in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A flexible anti-collision device for the overall lifting of a large-span steel space frame includes a guide rail frame, guide cable fixing points, flexible guide cables, clamps, guide wheel sets, collision warning sensors, laser rangefinders, buffer devices, and a steel space frame body. The steel space frame body is arranged on the guide rail frame, and multiple guide wheel sets are spaced apart along the lifting path of the steel space frame body. Buffer devices are installed between the guide wheel sets and the steel space frame body. Multiple guide cable fixing points are set in corresponding areas on the ground to connect the flexible guide cables. The other end of the flexible guide cables is firmly connected to the lower chord node of the steel space frame body through clamps. Multiple collision warning sensors are installed in the upper area of ​​the steel space frame body, and laser rangefinders are set in the surrounding area. The laser rangefinders and collision warning sensors are respectively connected to a computer control terminal to promptly feed back the monitored signal data to the computer control terminal.

[0007] Furthermore, the guide wheel assembly includes a fixed bracket and multiple guide wheels mounted on the bracket. The guide wheels are made of a material with a low coefficient of rolling friction, and their wheel surfaces are adapted to the outer contour of the steel space frame body. They are used to laterally constrain the steel space frame body during the lifting process and guide the steel space frame body to rise along a predetermined lifting trajectory.

[0008] Furthermore, the guide wheel assembly is connected to the ground or surrounding structure through an adjustable connecting device, and the position and angle of the guide wheel assembly can be finely adjusted according to the actual lifting position and posture of the steel grid body.

[0009] Furthermore, each of the guide cable fixing points is equipped with a screw adjustment mechanism, which can adjust the tension of the flexible guide cable according to actual needs.

[0010] Furthermore, the flexible guide cable is made of a material with a certain elasticity and tensile strength. One end of the cable is connected to the main body of the steel grid frame through a special connecting clamp, while the other end is fixed to the guide cable fixing point on the ground or a surrounding stable structure.

[0011] Furthermore, the guide rail frame is assembled from channel steel, and the guide cable fixing point is assembled and fixed by expansion bolts; the clamp is made of stainless steel; the guide wheel assembly is made of polyurethane composite material; and the buffer device is made of rubber or spring.

[0012] This invention provides another technical solution: a method for implementing a flexible anti-collision device for the overall lifting of a large-span steel space frame, comprising the following steps:

[0013] S1: Before lifting the main body of the steel space frame, check whether the tension of the flexible guide cable is appropriate, whether the guide wheel group rotates flexibly, whether the collision warning sensor is working properly, and whether the buffer device is installed in place.

[0014] S2: Start the computer control terminal to calibrate and debug the collision warning sensor to ensure that the collision warning sensor can accurately monitor the distance between the main body of the steel space frame and surrounding objects, and accurately transmit the monitoring data to the computer control terminal. At the same time, establish a communication connection between the computer control terminal and the lifting equipment of the steel space frame to ensure that the two can achieve information interaction and collaborative work.

[0015] S3: During the lifting process of the steel space frame, collision warning sensors monitor the distance between the steel space frame and surrounding objects in real time and transmit the monitoring data to the computer control terminal. The computer control terminal analyzes and processes the data in real time. When the monitored distance is less than the preset safety distance, the computer control terminal immediately sends an instruction to the lifting equipment to reduce the lifting speed or suspend the lifting. At the same time, the computer control terminal adjusts the tension of the flexible guide cable and the position and angle of the guide wheel group through the adjustment mechanism according to the actual lifting position and posture of the steel space frame, ensuring that the flexible guidance system can always effectively guide the lifting trajectory of the steel space frame.

[0016] S4: If the main body of the steel space frame collides with surrounding objects, the buffer device will immediately take effect to absorb the collision energy and reduce the damage to the main body of the steel space frame and surrounding objects. After the collision occurs, the computer control terminal will immediately issue an alarm signal to remind the operator to check and handle the situation.

[0017] S5: After the main body of the steel space frame is raised to the design height and the subsequent installation and fixing work is completed, first remove the collision warning sensor and buffer device of the anti-collision warning and buffer system, then gradually relax the tension of the flexible guide cable, remove the flexible guide cable from the main body of the steel space frame and the guide cable fixing point, and finally remove the fixing bracket and guide wheel of the guide wheel group.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The flexible anti-collision device and implementation method for the overall lifting of large-span steel space frame of the present invention improves the guiding accuracy: by setting flexible guide cables and guide wheel sets, the lifting trajectory of the large-span steel space frame during the overall lifting process can be effectively constrained and guided, reducing the deviation caused by external factors, improving the guiding accuracy of the steel space frame lifting, ensuring that the steel space frame can be accurately lifted to the design position, and providing a good foundation for subsequent installation work.

[0020] 2. The flexible anti-collision device and implementation method for the overall lifting of large-span steel space frame of the present invention enhances the anti-collision capability: the collision warning sensor can monitor the distance between the steel space frame and surrounding objects in real time. When a collision is detected, the control system can take corresponding measures in a timely manner, such as adjusting the operating parameters of the lifting equipment or activating the buffer device, which effectively avoids the occurrence of collision accidents and greatly enhances the safety of the overall lifting process of the steel space frame.

[0021] 3. The flexible anti-collision device and implementation method for the overall lifting of large-span steel space frame of the present invention are highly adaptable: they can be flexibly adjusted and arranged according to different construction site environments and steel space frame structural characteristics, and have strong adaptability, which can meet the needs of various large-span steel space frame overall lifting projects. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] In the diagram: 1. Guide rail frame; 2. Guide cable fixing point; 3. Flexible guide cable; 4. Clamp; 5. Guide wheel assembly; 6. Collision warning sensor; 7. Laser rangefinder; 8. Buffer device; 9. Steel space frame main body. Detailed Implementation

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Please see Figure 1This invention provides a flexible anti-collision device for the overall lifting of a large-span steel space frame, comprising a guide rail frame 1, guide cable fixing points 2, flexible guide cables 3, clamps 4, guide wheel sets 5, a collision warning sensor 6, a laser rangefinder 7, a buffer device 8, and a steel space frame body 9. The guide rail frame 1 is assembled from channel steel; the guide cable fixing points 2 are assembled and fixed using expansion bolts; the flexible guide cables 3 are made of high-strength steel wire rope; the clamps 4 are made of stainless steel; the guide wheel sets 5 are made of polyurethane composite material; and the buffer device 8 is made of rubber or springs. The steel space frame body 9 is arranged on the guide rail frame 1. Above, the guide rail frame 1 has multiple guide wheel sets 5 spaced apart along the lifting path of the steel space frame body 9. A buffer device 8 is installed between the guide wheel sets 5 and the steel space frame body 9. Multiple guide cable fixing points 2 are set in corresponding areas on the ground to connect flexible guide cables 3. The other end of the flexible guide cable 3 is firmly connected to the lower chord node of the steel space frame body 9 via a clamp 4. Multiple collision warning sensors 6 are installed in the upper area of ​​the steel space frame body 9, and laser rangefinders 7 are set in the surrounding area. The laser rangefinders 7 and collision warning sensors 6 are respectively connected to a computer control terminal to promptly feed back the monitored signal data to the computer control terminal. Specifically:

[0026] During the lifting process of the main steel space frame 9, it rises along the guide rail frame 1. Multiple guide cable fixing points 2 are set in corresponding areas on the ground. High-strength flexible guide cables 3 connect specific parts of the main steel space frame 9 to the guide cable fixing points 2. One end of the flexible guide cable 3 is firmly connected to the lower chord node of the main steel space frame 9 through a specially designed connecting clamp 4, and the other end is fixed to the guide cable fixing point 2 on the ground or surrounding stable structures. Each guide cable fixing point 2 is equipped with an adjustment device to adjust the tension of the flexible guide cable 3 according to actual needs.

[0027] Subsequently, multiple guide wheel sets 5 are arranged at intervals along the lifting path of the steel space frame body 9. Each guide wheel set 5 includes a fixed bracket and multiple guide wheels mounted on the bracket. The guide wheels are made of a material with a low coefficient of rolling friction, and their surfaces are adapted to the outer contour of the steel space frame body 9. This allows for lateral restraint of the steel space frame body 9 during lifting, guiding it upwards along a predetermined lifting trajectory. The guide wheel sets 5 are connected to the ground or surrounding structures via adjustable connecting devices, allowing for fine-tuning of their position and angle according to the actual lifting position and posture of the steel space frame body 9.

[0028] Next, multiple collision warning sensors 6 are installed on the upper part of the steel space frame body 9, and laser rangefinders 7 are set up in the surrounding area. These sensors can monitor the distance between the steel space frame and surrounding objects in real time and transmit the monitoring data to the computer control terminal. When the monitored distance is less than the preset safe distance, the sensor immediately sends a warning signal to the computer control terminal;

[0029] The computer control terminal receives and analyzes signals from the collision warning sensor 6. Once a potential collision is detected, the computer control terminal immediately initiates corresponding anti-collision measures. Simultaneously, the computer control terminal communicates with the lifting equipment of the steel space frame, enabling it to adjust the operating parameters of the lifting equipment according to actual conditions, such as reducing the lifting speed or pausing the lifting process.

[0030] In addition, a buffer device 8 is installed between the main body 9 of the steel space frame and the guide wheel assembly 5. The buffer device is made of a material with good buffering performance. When the main body 9 of the steel space frame collides with surrounding objects, the buffer device 8 can absorb the collision energy and reduce the damage caused to the main body 9 of the steel space frame 9 and surrounding objects.

[0031] To further illustrate the above-mentioned device, the present invention also provides a method for implementing a flexible anti-collision device for the overall lifting of a large-span steel space frame, comprising the following steps:

[0032] S1: Before lifting the main body 9 of the steel space frame, conduct a comprehensive inspection of the flexible anti-collision device to ensure that all components are securely installed and reliably connected. This includes checking whether the tension of the flexible guide cable 3 is appropriate, whether the guide wheel can rotate flexibly, whether the collision warning sensor 6 is working properly, and whether the buffer device 8 is installed in place.

[0033] S2: Start the computer control terminal to calibrate and debug the collision warning sensor 6 to ensure that the collision warning sensor 6 can accurately monitor the distance between the main body of the steel space frame 9 and surrounding objects, and accurately transmit the monitoring data to the computer control terminal. At the same time, establish a communication connection between the computer control terminal and the lifting equipment of the steel space frame to ensure that the two can achieve information interaction and collaborative work.

[0034] S3: During the lifting process of the steel space frame body 9, the collision warning sensor 6 monitors the distance between the steel space frame body 9 and surrounding objects in real time and transmits the monitoring data to the computer control terminal. The computer control terminal analyzes and processes the data in real time. When the monitored distance is less than the preset safe distance, the computer control terminal immediately sends an instruction to the lifting equipment to reduce the lifting speed or suspend the lifting. At the same time, according to the actual lifting position and posture of the steel space frame body 9, the computer control terminal fine-tunes the tension of the flexible guide cable 3 and the position and angle of the guide wheel group 5 through the adjustment mechanism to ensure that the flexible guide system can always effectively guide the lifting trajectory of the steel space frame body 9.

[0035] S4: If the main body of the steel space frame 9 collides with a surrounding object, the buffer device 8 will immediately take effect to absorb the collision energy and reduce the damage to the main body of the steel space frame 9 and the surrounding object. After the collision occurs, the computer control terminal will immediately issue an alarm signal to remind the operator to check and handle the situation.

[0036] S5: After the main body 9 of the steel grid frame is raised to the design height and the subsequent installation and fixing work is completed, first remove the collision warning sensor 6 and the buffer device 8 of the anti-collision warning and buffer system, then gradually loosen the tension of the flexible guide cable 3, remove the flexible guide cable 3 from the main body 9 of the steel grid frame and the guide cable fixing point 2, and finally remove the fixing bracket and guide wheel of the guide wheel group 5.

[0037] In summary, the present invention provides a flexible anti-collision device and implementation method for the overall lifting of a large-span steel space frame. Through the setting of a guide rail frame 1, guide cable fixing point 2, flexible guide cable 3, clamp 4, guide wheel group 5, collision warning sensor 6, laser rangefinder 7, and buffer device 8, in conjunction with a computer control terminal, it can ensure that the steel space frame can be lifted safely, accurately, and efficiently to the design position, solving the problem of easy collisions during the overall lifting of large-span steel space frames in the prior art.

[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A flexible anti-collision device for the overall lifting of a large-span steel space frame, characterized in that, The system includes a guide rail frame (1), guide cable fixing points (2), flexible guide cables (3), clamps (4), guide wheel sets (5), collision warning sensors (6), laser rangefinders (7), buffer devices (8), and a steel grid frame body (9). The steel grid frame body (9) is arranged on the guide rail frame (1), and multiple guide wheel sets (5) are arranged at intervals on the lifting path of the steel grid frame body (9) on the guide rail frame (1). Buffer devices (8) are installed between the guide wheel sets (5) and the steel grid frame body (9). Multiple guide cable fixing points (2) are set in corresponding areas on the ground to connect the flexible guide cables (3). The other end of the flexible guide cables (3) is firmly connected to the lower chord node of the steel grid frame body (9) through clamps (4). Multiple collision warning sensors (6) are installed in the upper area of ​​the steel grid frame body (9), and laser rangefinders (7) are set in the surrounding area. The laser rangefinders (7) and collision warning sensors (6) are respectively connected to a computer control terminal to promptly feed back the monitored signal data to the computer control terminal.

2. The flexible anti-collision device for the overall lifting of a large-span steel space frame as described in claim 1, characterized in that: The guide wheel assembly (5) includes a fixed bracket and multiple guide wheels mounted on the bracket. The guide wheels are made of a material with a low coefficient of rolling friction. Their wheel surfaces are adapted to the outer contour of the steel grid body (9) and are used to laterally constrain the steel grid body (9) during the lifting process, guiding the steel grid body (9) to rise along a predetermined lifting trajectory.

3. The flexible anti-collision device for the overall lifting of a large-span steel space frame as described in claim 2, characterized in that: The guide wheel assembly (5) is connected to the ground or surrounding structure through an adjustable connecting device, and the position and angle of the guide wheel assembly (5) can be finely adjusted according to the actual lifting position and posture of the steel grid body (9).

4. The flexible anti-collision device for the overall lifting of a large-span steel space frame as described in claim 1, characterized in that: Each guide cable fixing point (2) is equipped with a screw adjustment mechanism, which can adjust the tension of the flexible guide cable (3) according to actual needs.

5. The flexible anti-collision device for the overall lifting of a large-span steel space frame as described in claim 1, characterized in that: The flexible guide cable (3) is made of a material with certain elasticity and tensile strength. One end of it is connected to the main body of the steel grid frame (9) through a special connecting clamp (4), and the other end is fixed on the guide cable fixing point (2) on the ground or the surrounding stable structure.

6. The flexible anti-collision device for the overall lifting of a large-span steel space frame as described in claim 1, characterized in that: The guide rail frame (1) is assembled from channel steel, and the guide cable fixing point (2) is assembled and fixed by expansion bolts; the clamp (4) is made of stainless steel; the guide wheel assembly (5) is made of polyurethane composite material; and the buffer device (8) is made of rubber or spring.

7. A method for implementing a flexible anti-collision device for the overall lifting of a large-span steel space frame as described in claim 1, characterized in that: The following steps are involved: S1: Before lifting the main body (9) of the steel grid frame, check whether the tension of the flexible guide cable (3) is appropriate, whether the guide wheel group (5) rotates flexibly, whether the collision warning sensor (6) is working properly, and whether the buffer device (8) is installed in place. S2: Start the computer control terminal to calibrate and debug the collision warning sensor (6) to ensure that the collision warning sensor (6) can accurately monitor the distance between the main body of the steel grid (9) and surrounding objects, and accurately transmit the monitoring data to the computer control terminal. At the same time, connect the computer control terminal with the lifting equipment of the steel grid to ensure that the two can achieve information interaction and collaborative work. S3: During the lifting process of the main body of the steel grid frame (9), the collision warning sensor (6) monitors the distance between the main body of the steel grid frame (9) and surrounding objects in real time and transmits the monitoring data to the computer control terminal. The computer control terminal performs real-time analysis and processing of the data. When the monitored distance is less than the preset safe distance, the computer control terminal immediately issues an instruction to the lifting equipment to reduce the lifting speed or suspend the lifting. At the same time, the computer control terminal adjusts the tension of the flexible guide cable (3) and the position and angle of the guide wheel group (5) through the adjustment mechanism according to the actual lifting position and posture of the main body of the steel grid frame (9) to ensure that the flexible guide system can always effectively guide the lifting trajectory of the main body of the steel grid frame (9). S4: If the main body of the steel space frame (9) collides with the surrounding objects, the buffer device (8) will immediately play a role in absorbing the collision energy and reducing the damage caused by the collision to the main body of the steel space frame (9) and the surrounding objects. After the collision occurs, the computer control terminal will immediately issue an alarm signal to remind the operator to check and handle the situation. S5: After the main body of the steel grid frame (9) is raised to the design height and the subsequent installation and fixing work is completed, first remove the collision warning sensor (6) and buffer device (8) of the anti-collision warning and buffer system, then gradually loosen the tension of the flexible guide cable (3), remove the flexible guide cable (3) from the main body of the steel grid frame (9) and the guide cable fixing point (2), and finally remove the fixing bracket and guide wheel of the guide wheel group (5).

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