Large-span steel structure detection device

Abstract

The utility model provides a large-span steel structure detection device, and mainly relates to the technical field of nondestructive testing. A large-span steel structure detection device comprises a strain gauge, an electromagnetic coil and a cable, the electromagnetic coil is fixedly installed in the middle of the strain gauge, the cable electrically connected with the electromagnetic coil is arranged on one side of the electromagnetic coil, installation blocks are fixedly installed at the two ends of the strain gauge respectively, and the large-span steel structure detection device further comprises fixing bases in one-to-one correspondence with the installation blocks. And a positioning assembly is arranged between the two fixed seats. The fixing device has the advantages that when the fixing device is used, the two fixing bases can be connected through the positioning plate in the positioning assembly, so that the distance between the two fixing bases is guaranteed, and the installation precision of the fixing device is improved.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of nondestructive testing, in particular to a large-span steel structure detection device. Background Technique

[0002] During the construction process of large-span space steel structures, the influence of temperature changes and working conditions on the structure is significant. Especially, the structural deformation caused by stress changes in a certain link during the construction process may even lead to the inability to continue construction in the next link. Therefore, it is necessary to conduct mechanical analysis and construction monitoring on the construction process of large-span space steel structures.

[0003] In the early stage of domestic research on structural monitoring, it focused on the field of large machinery. In the 1990s, the steel structure monitoring system was gradually applied to some large bridges. With the development of science and technology, the structural monitoring system has also been gradually applied to many other engineering structures, such as high-rise buildings, railway stations, stadiums, etc. The development of the construction process monitoring system has gone through multiple stages, including manual monitoring, single-machine centralized monitoring, distributed online monitoring, remote distributed online monitoring system, and wireless sensor network monitoring system, etc.

[0004] In the prior art, the stress monitoring of steel structures generally uses fixed stress gauges for real-time monitoring. The stress gauge mainly consists of a strain gauge, an electromagnetic coil, and a mounting seat. When installing, a connecting seat needs to be welded on the steel frame for fixing the mounting seat. Since the length of the stress gauge is fixed, when welding the mounting seat, the distance between the two mounting seats needs to be strictly controlled. In the prior art, when welding the mounting seat, generally, after measuring the length of the stress gauge, corresponding marks are made on the steel frame, and then the mounting seat is aligned with the marked points and welded and fixed. The operation is complex, and the mounting seat is also prone to shift due to improper operation during welding, which is not convenient to use. Content of the Utility Model

[0005] To solve the deficiencies of the prior art, the utility model provides a large-span steel structure detection device. The device realizes the positioning during the welding process of the fixed seat through a detachable mounting plate, preventing the positions of the two fixed seats from shifting.

[0006] To achieve the above object, the utility model is realized through the following technical solutions:

[0007] A large-span steel structure detection device includes a strain gauge, an electromagnetic coil, and a cable. An electromagnetic coil is fixedly installed in the middle of the strain gauge. A cable electrically connected to the electromagnetic coil is provided on one side of the electromagnetic coil. Mounting blocks are fixedly installed at both ends of the strain gauge respectively. It further includes fixed seats corresponding to the mounting blocks one by one. A positioning component is provided between the two fixed seats.

[0008] Further, a threaded post is fixedly installed at the center of the top surface of the fixed seat. An installation hole corresponding to the threaded post is formed at the top of the installation block. The threaded post passes through the corresponding installation hole respectively, and the threaded post can be locked by a nut.

[0009] Further, the positioning assembly includes a U-shaped frame. The U-shaped frames are fixedly installed on one side of the two fixed seats respectively. The openings of the two U-shaped frames face forward. A positioning plate is movably installed between the two U-shaped frames. The two ends of the positioning plate are respectively inserted into the corresponding U-shaped frames.

[0010] Further, through holes are formed at the rear parts of the U-shaped frames. Screwed holes coaxial with the through holes are respectively formed on the surfaces of the two ends of the positioning plate opposite to the through holes. Bolts threadedly engaged with the screwed holes are movably installed in the through holes respectively.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] When the device is in use, the connection between the two fixed seats can be realized through the positioning plate in the positioning assembly, and the distance between the two fixed seats is restricted by the positioning plate, so as to ensure that the distance between the two fixed seats can meet the installation of the installation blocks at both ends of the strain gauge, and improve the installation accuracy of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is Figure 1 a partial enlarged view of

[0015] Figure 3 is a partial sectional structural diagram taken along the line A-A in Figure 1 ;

[0016] Reference numerals shown in the drawings: 1, strain gauge; 2, electromagnetic coil; 3, cable; 4, installation block; 5, fixed seat; 6, threaded post; 7, installation hole; 8, U-shaped frame; 9, positioning plate; 10, through hole; 11, screwed hole; 12, bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] With reference to the accompanying drawings and specific embodiments, the present utility model will be further described. It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. In addition, it should be understood that after reading the content taught by the present utility model, those skilled in the art can make various changes or modifications to the present utility model, and these equivalent forms also fall within the scope defined by this application.

[0018] Embodiment: A large-span steel structure detection device

[0019] AsFigures 1-3 As shown in the figure, a large-span steel structure detection device, its specific structure includes:

[0020] A strain gauge 1, an electromagnetic coil 2, and a cable 3. An electromagnetic coil 2 is fixedly installed in the middle of the strain gauge 1. A cable 3 electrically connected to the electromagnetic coil 2 is provided on one side of the electromagnetic coil 2. Mounting blocks 4 are fixedly installed at both ends of the strain gauge 1 respectively. There is also a fixed seat 5 corresponding to each mounting block 4 one by one. A positioning component is provided between the two fixed seats 5.

[0021] The above working principle: When this device is in use, the distance between the two fixed seats 5 is limited through the positioning component, keeping the distance between the two fixed seats 5 constant before and after installation. The fixed seats 5 are welded to the corresponding positions on the steel frame (the specific installation position is determined according to the setting of the monitoring points). Then, the mounting blocks 4 are respectively fixed to the corresponding fixed seats 5 to complete the installation of the strain gauge 1. The structure is simple and easy to use.

[0022] A threaded column 6 is fixedly installed at the center of the top surface of the fixed seat 5. A mounting hole 7 corresponding to the threaded column 6 is opened at the top of the mounting block 4. The threaded column 6 respectively passes through the corresponding mounting holes 7, and the threaded column 6 can be locked by a nut.

[0023] When this structural design is in use, after the threaded columns 6 respectively pass through the corresponding mounting holes 7, nuts are threadedly installed on the threaded columns 6 respectively for fixation, and the connection between the mounting block 4 and the fixed seat 5 can be realized. To ensure the connection effect, a lock washer can be provided between the nut and the mounting block 4 to further improve the stability of this device.

[0024] The positioning component includes a U-shaped frame 8. U-shaped frames 8 are fixedly installed on one side of the two fixed seats 5 facing each other. The openings of the two U-shaped frames 8 both face forward. A positioning plate 9 is movably installed between the two U-shaped frames 8. The two ends of the positioning plate 9 are respectively inserted into the corresponding U-shaped frames 8. When this structural design is in use, the distance between the two fixed seats 5 can be limited through the mutual cooperation between the U-shaped frame 8 and the positioning plate 9. In the state where both ends of the positioning plate 9 are completely inserted into the corresponding U-shaped frames 8, the distance between the two fixed seats 5 is always fixed, which can improve the accuracy of the fixed seat 5 during the welding process.

[0025] A through hole 10 is formed in the rear part of the U-shaped frame 8. On the two opposite sides of the positioning plate 9 at both ends, threaded holes 11 coaxial with the through hole 10 are respectively formed. A bolt 12 threadedly engaged with the threaded hole 11 is movably installed in each through hole 10. After passing through the through hole 10, the bolt 12 is threadedly connected to the opposite threaded hole 11. When this structural design is in use, the positioning plate 9 can be fixed through the mutual cooperation of the bolt 12 with the through hole 10 and the threaded hole 11. After the positioning plate 9 is inserted into the U-shaped frame 8, the bolt 12 is used for locking, which can prevent the positioning plate 9 from disengaging from the U-shaped frame 8 and further improve the reliability of the device. After the fixed seat 5 is welded to the steel frame, the bolt 12 can be rotated to screw it out of the threaded hole 11, facilitating the disassembly and recycling of the positioning plate 9, and the positioning plate 9 can be reused.

[0026] This solution further includes a controller, the position of which is set by the staff according to the actual situation during operation. The controller is used to control all the electrical appliances in this solution, including but not limited to sensors, motors, telescopic rods, water pumps, solenoid valves, heating wires, heat pumps, display screens, computer input devices, switch buttons, communication devices, lights, speakers, and microphones. The controller is an Intel processor, AMD processor, PLC controller, ARM processor, or single-chip microcomputer. Supporting it are also a main board, memory, storage medium, and power supply. The power supply is mains power or a lithium battery. When there is a display screen, a display card is also provided. For the operating principle of the controller, please refer to "Principles of Automatic Control", "Principles and Application Simulation Cases of Microcontrollers", and "Principles and Applications of Sensors" published by Tsinghua University Press. Other books in this field can also be referred to for reading. Other automated controls and electrical appliances not mentioned herein are all well-known knowledge to those skilled in the art and will not be elaborated here.

[0027] In the explanation of the present utility model, it should be noted that the terms indicating directions are only for the convenience of description and understanding, and do not uniquely limit the installation positions of specific technical features, and other achievable installation methods are not excluded.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. However, such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A large-span steel structure detection device, comprising a strain gauge (1), an electromagnetic coil (2), and a cable (3), characterized in that: An electromagnetic coil (2) is fixedly installed in the middle of the strain gauge (1). A cable (3) electrically connected to the electromagnetic coil (2) is provided on one side of the electromagnetic coil (2). Mounting blocks (4) are fixedly installed at both ends of the strain gauge (1) respectively. A fixing seat (5) corresponding to each mounting block (4) is further included. A positioning component is provided between the two fixing seats (5).

2. The large-span steel structure detection device according to claim 1, characterized in that: A threaded column (6) is fixedly installed at the center of the top surface of the fixing seat (5). A mounting hole (7) corresponding to the threaded column (6) is formed at the top of the mounting block (4). The threaded columns (6) respectively pass through the corresponding mounting holes (7), and the threaded columns (6) can be locked by nuts.

3. The large-span steel structure detection device according to claim 1, characterized in that: The positioning component includes a U-shaped frame (8). U-shaped frames (8) are fixedly installed on one side of each of the two fixing seats (5) facing each other. The openings of the two U-shaped frames (8) both face forward. A positioning plate (9) is movably installed between the two U-shaped frames (8). Both ends of the positioning plate (9) are respectively inserted into the corresponding U-shaped frames (8).

4. The large-span steel structure detection device according to claim 3, characterized in that: Through holes (10) are formed at the rear parts of the U-shaped frames (8). Threaded holes (11) coaxial with the through holes (10) are respectively formed on one side of both ends of the positioning plate (9) facing the through holes (10). Bolts (12) threadedly engaged with the threaded holes (11) are movably installed in the through holes (10).

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