A building steel structure deformation detection device

Abstract

This invention discloses a deformation detection device for building steel structures, relating to the field of optical deformation detection technology. It includes a laser emitter and a receiver, and two symmetrically arranged movable blocks. The movable blocks are connected to the steel structure via a moving mechanism, and each movable block has a lifting block connected to its top via a telescopic mechanism. The sidewalls of the lifting blocks are sloped, and mounting plates are fixedly connected to the sidewalls of the lifting blocks. The laser emitter and receiver are mounted on the mounting plates, and first connecting plates are fixedly connected to the sidewalls of each mounting plate. The two first connecting plates are detachably connected. This deformation detection device for building steel structures facilitates synchronous movement and adjustment of the laser emitter and receiver, thereby facilitating the detection of different parts of the steel structure and making the detection more comprehensive. Simultaneously, it can automatically clean the optical output components of the laser emitter with air, improving the detection effect.

Description

Technical Field

[0001] This invention relates to the field of deformation optical detection technology, specifically to a deformation detection device for building steel structures. Background Technology

[0002] Steel structures are one of the main types of building structures, such as steel bridges. During use, it is necessary to detect the deformation of the steel structure. Currently, the main devices used are laser emitters and receivers. When the steel beam structure deforms, the positions of the laser emitter and receiver become misaligned, and the laser emitted by the laser emitter is skewed, making it impossible for the receiver to receive the laser normally. When the detection unit detects that the laser emitter is working but the receiver is not receiving the laser normally, it activates the warning unit to issue a warning, reminding the staff to check and deal with it in time. This realizes the function of real-time detection of deformation of steel beam structures at high altitudes.

[0003] However, in existing steel structure deformation detection devices, the laser emitter and receiver are fixedly installed on the steel structure, which makes it inconvenient to detect different parts, resulting in insufficient detection and affecting the detection effect.

[0004] Therefore, we propose a deformation detection device for building steel structures. Summary of the Invention

[0005] The purpose of this invention is to provide a deformation detection device for building steel structures to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a deformation detection device for a building steel structure, comprising a laser emitter and a receiver, and further comprising two symmetrically arranged movable blocks, wherein the movable blocks are connected to the steel structure building through a moving mechanism, and the top of each movable block is connected to a lifting block through a telescopic mechanism, wherein the side wall of the lifting block is provided with an inclined surface, and the side wall of the lifting block is fixedly connected to an mounting plate, wherein the laser emitter and the receiver are mounted on the mounting plate, and the side wall of each mounting plate is fixedly connected to a first connecting plate, and the two first connecting plates are detachably connected.

[0007] Preferably, the moving mechanism includes a guide rail connected to the steel structure building, and a slider is slidably connected on the guide rail. A connecting frame is fixedly connected to the bottom of the slider, and the side wall of the connecting frame is connected to the moving block through a moving component. The movement of the slider is driven by a driving component.

[0008] By adopting the above technical solution, the slider is driven to slide along the guide rail by the driving component. At the same time, when the slider moves, it can drive the connecting frame to move, and the two moving blocks can move synchronously through the moving component and the first connecting plate. In turn, the lifting block and the mounting plate are moved by the telescopic mechanism, which in turn drives the laser emitter and receiver to move synchronously, thus ensuring the detection effect.

[0009] Preferably, the driving component includes a fixed block fixedly connected to the side wall of the slider, and a first motor is fixedly connected to the side wall of the fixed block. A first roller is fixedly connected to the output end of the first motor, and the first roller rolls at the bottom of the steel structure building.

[0010] By adopting the above technical solution, the first motor is started, and the rotation of the first motor drives the rotation of the first roller, so that the first roller rolls at the bottom of the steel structure building, thereby pushing the slider to slide along the guide rail, which facilitates the movement and adjustment of the slider.

[0011] Preferably, the moving component includes a threaded tube fixedly connected to the side wall of the moving block, and a threaded rod is threadedly connected inside the threaded tube. The other end of the threaded rod is rotatably connected to the side wall of the connecting frame, and a second motor is fixedly connected to the side wall of the connecting frame. The output end of the second motor is fixed to one end of the threaded rod, and a guide component is provided between the connecting frame and the moving block.

[0012] By adopting the above technical solution, the second motor is started, and the rotation of the second motor drives the threaded rod to rotate, which in turn drives the moving block to move, thereby driving the laser emitter and receiver to move and adjust.

[0013] Preferably, the guide assembly includes two first sleeves fixedly connected to the side wall of the moving block, and a first sleeve rod is inserted into the first sleeve, the other end of the first sleeve rod being fixed to the side wall of the connecting frame.

[0014] By adopting the above technical solution, the movement of the moving block is guided.

[0015] Preferably, the telescopic mechanism includes two second sleeves fixedly connected to the top of the movable block, and a second sleeve rod is inserted into each second sleeve. The upper end of the second sleeve rod is fixed to the bottom of the lifting block, and the second sleeve rod is connected to the second sleeve through a spring.

[0016] By adopting the above technical solution, it is ensured that the lifting block can always be in contact with the bottom of the steel structure building. When there is a height difference between different parts of the bottom of the steel structure building, the lifting block can also be guaranteed to cross over under the action of the slope. Furthermore, when deformation occurs, the lifting block can move up or down, and at the same time, it can drive the laser transmitter to move synchronously, so that the receiver cannot receive the laser normally.

[0017] Preferably, the side wall of the mounting plate is provided with a cleaning mechanism for cleaning the optical light-emitting components of the laser emitter. The cleaning mechanism includes a support block fixedly connected to the side wall of the mounting plate, and a second connecting plate is fixedly connected to the side wall of the support block. An air jet pipe is fixedly inserted into the side wall of the second connecting plate, and an air supply assembly for driving the air jet pipe to spray air is provided on the side wall of the support block.

[0018] By adopting the above technical solution, during testing, air is introduced into the jet pipe through the air supply component and sprayed onto the optical light-emitting components of the laser emitter, which can automatically clean them and ensure the accuracy of the test results.

[0019] Preferably, the air supply assembly includes a U-shaped frame, which is rotatably connected to the top of the support block via a rotating rod. A fixed cylinder is fixedly connected to the side wall of the U-shaped frame, and a piston is slidably connected inside the fixed cylinder. An air inlet pipe is fixedly inserted into the side wall of the fixed cylinder, and an air jet pipe is connected to the fixed cylinder via a flexible hose. A first one-way valve is provided inside the air inlet pipe, and a second one-way valve is provided inside the air jet pipe. The piston is connected to the fixed cylinder via a reset assembly, and the piston's lifting and lowering is driven by a pushing assembly.

[0020] By adopting the above technical solution, the piston reciprocates up and down inside the fixed cylinder through the reset component and the push component. When the piston moves upward, a negative pressure is generated inside the fixed cylinder. At the same time, the first one-way valve opens and the second one-way valve closes, allowing external air to enter the fixed cylinder through the air inlet pipe. When the piston moves downward, it compresses the air inside the fixed cylinder. At the same time, the first one-way valve closes and the second one-way valve opens, allowing the air inside the fixed cylinder to enter the jet pipe through the hose and be sprayed onto the optical light-emitting components of the laser emitter, enabling automatic cleaning and ensuring the accuracy of the detection results.

[0021] Preferably, the reset assembly includes a first connecting block fixedly connected to the side wall of the fixed cylinder, and a second connecting block is connected to the top of the first connecting block via a spring telescopic rod assembly, the second connecting block being fixed to the side wall of the piston.

[0022] By adopting the above technical solution, the piston's lifting and lowering functions are guided and reset.

[0023] Preferably, the pushing assembly includes a second roller, which is rotatably connected to the side wall of the U-shaped frame via a rotating shaft. A cam is fixedly connected to the end of the rotating shaft, and the cam is capable of sliding on the top of the piston.

[0024] By adopting the above technical solution, during testing, the second roller can roll at the bottom of the steel structure building. When the second roller rolls, it can drive the cam to rotate through the rotating shaft. At the same time, the U-shaped frame and the support block are rotatably connected through the rotating rod, ensuring that the second roller can adaptively adjust its orientation according to the direction of movement. When the tip of the cam abuts against the top of the piston, it can push the piston to move downward.

[0025] In summary: Advantage 1: It facilitates the synchronous movement and adjustment of the laser emitter and receiver, thereby making it easier to inspect different parts of the steel structure building, resulting in more comprehensive inspection and improved inspection results; Advantage 2: During testing, the optical output components of the laser emitter can be automatically cleaned by blowing air, improving the testing effect. Attached Figure Description

[0026] Figure 1 This is a schematic diagram illustrating the usage state of the present invention; Figure 2 This is a schematic diagram illustrating the usage state from another perspective of the present invention; Figure 3 This is a schematic diagram of the telescopic mechanism in this invention; Figure 4 This is a schematic diagram of the cleaning mechanism in this invention; Figure 5 This is a schematic diagram of the result of the moving mechanism in this invention; Figure 6 This is a schematic diagram of the receiver structure in this invention; Figure 7 This is a schematic diagram of the structure of the reset component and the push component in this invention.

[0027] In the diagram: 1. Steel structure building; 201. Guide rail; 202. Slider; 203. Connecting frame; 301. Fixing block; 302. First motor; 303. First roller; 401. Threaded pipe; 402. Threaded rod; 403. Second motor; 501. First sleeve; 502. First rod; 601. Second sleeve; 602. Second rod; 701. Support block; 702. Second connecting plate; 703. Jet pipe; 80 1. U-shaped frame; 802. Fixed cylinder; 803. Air inlet pipe; 804. Hose; 805. Piston; 901. First connecting block; 902. Spring telescopic rod assembly; 903. Second connecting block; 1001. Rotating shaft; 1002. Second roller; 1003. Cam; 11. Moving block; 12. Lifting block; 1201. Inclined surface; 13. Mounting plate; 14. Laser emitter; 15. Receiver; 16. First connecting plate. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1-7 The diagram illustrates a deformation detection device for a steel structure, comprising a laser emitter 14 and a receiver 15. The structure and principle of these components are well-known in this field and will not be elaborated upon here. It also includes two symmetrically arranged movable blocks 11, which are connected to the steel structure building 1 (which can be a steel bridge) via a moving mechanism. Each movable block 11 has a lifting block 12 connected to its top via a telescopic mechanism. The sidewalls of the lifting blocks 12 are provided with inclined surfaces 1201, and mounting plates 13 are fixedly connected to the sidewalls of the lifting blocks 12. The laser emitter 14 and receiver 15 are mounted on the mounting plates 13. Each mounting plate 13 has a first connecting plate 16 fixedly connected to its sidewall, and the two first connecting plates 16 are detachably connected. This facilitates synchronous movement and adjustment of the laser emitter 14 and receiver 15, enabling more comprehensive detection of different parts of the steel structure building 1. Furthermore, it allows for automatic air cleaning of the optical output components of the laser emitter 14, improving the detection effect.

[0030] The moving mechanism includes a guide rail 201 connected to the steel structure building 1, and a slider 202 slidably connected to the guide rail 201. A connecting frame 203 is fixedly connected to the bottom of the slider 202, and the side wall of the connecting frame 203 is connected to the moving block 11 through a moving component. The movement of the slider 202 is driven by a driving component, which drives the slider 202 to slide along the guide rail 201. At the same time, when the slider 202 moves, it can drive the connecting frame 203 to move, and through the moving component and the first connecting plate 16, it drives the two moving blocks 11 to move synchronously. In turn, through the telescopic mechanism, it drives the lifting block 12 and the mounting plate 13 to move, and then drives the laser emitter 14 and the receiver 15 to move synchronously, so as to ensure the detection effect.

[0031] The driving component includes a fixed block 301 fixedly connected to the side wall of the slider 202, and a first motor 302 fixedly connected to the side wall of the fixed block 301. A first roller 303 is fixedly connected to the output end of the first motor 302, and the first roller 303 rolls at the bottom of the steel structure building 1. When the first motor 302 is started, the rotation of the first motor 302 drives the rotation of the first roller 303, causing the first roller 303 to roll at the bottom of the steel structure building 1, thereby pushing the slider 202 to slide along the guide rail 201, thus facilitating the movement and adjustment of the slider 202.

[0032] The moving component includes a threaded tube 401 fixedly connected to the side wall of the moving block 11, and a threaded rod 402 is threadedly connected inside the threaded tube 401. The other end of the threaded rod 402 is rotatably connected to the side wall of the connecting frame 203, and a second motor 403 is fixedly connected to the side wall of the connecting frame 203. The output end of the second motor 403 is fixed to one end of the threaded rod 402, and a guide component is provided between the connecting frame 203 and the moving block 11. When the second motor 403 is started, the rotation of the second motor 403 drives the threaded rod 402 to rotate, which can drive the moving block 11 to move, thereby driving the laser emitter 14 and receiver 15 to move and adjust.

[0033] The guide assembly includes two first sleeves 501 fixedly connected to the side wall of the movable block 11, and a first sleeve rod 502 is inserted into the first sleeve 501. The other end of the first sleeve rod 502 is fixed to the side wall of the connecting frame 203, which guides the movement of the movable block 11.

[0034] The telescopic mechanism includes two second sleeves 601 fixedly connected to the top of the movable block 11, and a second sleeve rod 602 is inserted into each second sleeve 601. The upper end of the second sleeve rod 602 is fixed to the bottom of the lifting block 12, and the second sleeve rod 602 is connected to the second sleeve 601 by a spring, ensuring that the lifting block 12 can always abut against the bottom of the steel structure building 1. When there is a height difference between different parts of the bottom of the steel structure building 1, the lifting block 12 can also be guaranteed to cross under the action of the inclined plane 1201. Furthermore, when deformation occurs, the lifting block 12 can move up or down, and at the same time, it can drive the laser emitter 14 to move synchronously, so that the receiver 15 cannot receive the laser normally.

[0035] The side wall of the mounting plate 13 is provided with a cleaning mechanism for cleaning the optical light-emitting components of the laser emitter 14. The cleaning mechanism includes a support block 701 fixedly connected to the side wall of the mounting plate 13, and a second connecting plate 702 fixedly connected to the side wall of the support block 701. An air jet pipe 703 is fixedly inserted into the side wall of the second connecting plate 702, and an air supply component for driving the air jet pipe 703 to spray air is provided on the side wall of the support block 701. During testing, air enters the air jet pipe 703 through the air supply component and is sprayed onto the optical light-emitting components of the laser emitter 14, which can automatically clean them and ensure the accuracy of the test results.

[0036] The air supply assembly includes a U-shaped frame 801, which is rotatably connected to the top of a support block 701 via a rotating rod. A fixed cylinder 802 is fixedly connected to the side wall of the U-shaped frame 801, and a piston 805 is slidably connected inside the fixed cylinder 802. An air inlet pipe 803 is fixedly inserted into the side wall of the fixed cylinder 802. A filter screen can be installed at the air inlet end of the air inlet pipe 803. An air jet pipe 703 is connected to the fixed cylinder 802 via a flexible hose 804. A first one-way valve is installed inside the air inlet pipe 803, with the first one-way valve's conduction direction from the outside to the inside of the fixed cylinder 802. A second one-way valve is installed inside the air jet pipe 703, with the second one-way valve's conduction direction from the fixed cylinder 802 to the air jet pipe 703. The piston 805 is connected to the fixed cylinder 802 via a reset assembly, and the piston 805 is slidably connected to the fixed cylinder 802. The piston 805 is raised and lowered by a pushing assembly. The piston 805 moves up and down within the fixed cylinder 802 via a reset assembly and a pushing assembly. When the piston 805 moves upward, it creates a negative pressure within the fixed cylinder 802. Simultaneously, the first one-way valve opens and the second one-way valve closes, allowing external air to enter the fixed cylinder 802 through the air inlet pipe 803. When the piston 805 moves downward, it compresses the air within the fixed cylinder 802. At the same time, the first one-way valve closes and the second one-way valve opens, allowing the air within the fixed cylinder 802 to enter the jet pipe 703 through the hose 804 and be sprayed onto the optical output component of the laser emitter 14, automatically cleaning it and ensuring the accuracy of the detection results.

[0037] The reset assembly includes a first connecting block 901 fixedly connected to the side wall of the fixed cylinder 802, and a second connecting block 903 is connected to the top of the first connecting block 901 through a spring telescopic rod assembly 902. The second connecting block 903 is fixed to the side wall of the piston 805 and plays a guiding and reset role in the lifting and lowering of the piston 805.

[0038] The pushing component includes a second roller 1002. The first roller 303 and the second roller 1002 are made of rubber. The elastic coefficient of the spring of the telescopic mechanism is sufficient to ensure that the lifting block 12 can abut against the bottom of the steel structure building 1. The second roller 1002 deforms and is rotatably connected to the side wall of the U-shaped frame 801 through a rotating shaft 1001. A cam 1003 is fixedly connected to the end of the rotating shaft 1001, and the cam 1003 can slide on the top of the piston 805. During testing, the second roller 1002 can roll at the bottom of the steel structure building 1. When the second roller 1002 rolls, it can drive the cam 1003 to rotate through the rotating shaft 1001. At the same time, the U-shaped frame 801 and the support block 701 are rotatably connected through a rotating rod to ensure that the second roller 1002 can adaptively adjust its orientation according to the direction of movement. When the tip of the cam 1003 abuts against the top of the piston 805, it can push the piston 805 to move downward.

[0039] Working principle: After the steel structure building 1 is completed, the guide rail 201 is first installed on the steel structure building 1. Then, the slider 202 is slid onto the guide rail 201 and the two first connecting plates 16 are connected. The lifting block 12 abuts against the bottom of the steel structure building 1, the spring is compressed, and the laser is emitted by the laser emitter 14 and received by the receiver 15, thus realizing deformation detection.

[0040] During testing, the first motor 302 is started. The rotation of the first motor 302 drives the rotation of the first roller 303, causing the first roller 303 to roll at the bottom of the steel structure building 1. This pushes the slider 202 to slide along the guide rail 201. When the slider 202 moves, it drives the connecting frame 203 to move, and through the moving component and the first connecting plate 16, it drives the two moving blocks 11 to move synchronously. This, in turn, drives the lifting block 12 and the mounting plate 13 to move through the telescopic mechanism, thereby driving the laser emitter 14 and the receiver 15 to move synchronously. During testing, under the action of the telescopic mechanism, the lifting block 12 can move along the bottom of the steel structure building 1, and at the same time, it can scrape and clean the surface impurities. When deformation occurs, the lifting block 12 can move up or down, and at the same time, it can drive the laser emitter 14 to move synchronously, so that the receiver 15 cannot receive the laser normally.

[0041] Furthermore, the second motor 403 can be activated, and the rotation of the second motor 403 drives the threaded rod 402 to rotate, which in turn drives the moving block 11 to move, thereby driving the laser emitter 14 and receiver 15 to move, facilitating the detection of different parts. In addition, it can ensure that the distance between the laser emitter 14 and receiver 15 and the detection part is the same, ensuring the efficiency and effectiveness of the detection.

[0042] When there is a height difference between different parts of the bottom of the steel structure building 1, the lifting block 12 can still be crossed by the inclined plane 1201.

[0043] Meanwhile, during testing, the second roller 1002 can roll at the bottom of the steel structure building 1. When the second roller 1002 rolls, it can drive the cam 1003 to rotate through the rotating shaft 1001. At the same time, the U-shaped frame 801 and the support block 701 are rotatably connected through the rotating rod to ensure that the second roller 1002 can adaptively adjust its orientation according to the direction of movement.

[0044] When the tip of the cam 1003 abuts against the top of the piston 805, it can push the piston 805 downward. At the same time, the spring telescopic rod assembly 902 is compressed. When the tip of the cam 1003 passes the top of the piston 805, the piston 805 can move upward and reset under the action of the fixed cylinder 802. By repeating this process, the piston 805 can move up and down inside the fixed cylinder 802.

[0045] When piston 805 moves upward, it creates negative pressure inside the fixed cylinder 802. At the same time, the first one-way valve opens and the second one-way valve closes, allowing external air to enter the fixed cylinder 802 through the air inlet pipe 803. When piston 805 moves downward, it compresses the air inside the fixed cylinder 802. Simultaneously, the first one-way valve closes and the second one-way valve opens, allowing the air inside the fixed cylinder 802 to enter the jet pipe 703 through the hose 804 and be sprayed onto the optical light-emitting components of the laser emitter 14, enabling automatic cleaning and ensuring the accuracy of the detection results.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] 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 alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A deformation detection device for building steel structures, comprising a laser emitter (14) and a receiver (15), characterized in that, It also includes two symmetrically arranged movable blocks (11), which are connected to the steel structure building (1) through a moving mechanism. Each movable block (11) has a lifting block (12) connected to its top through a telescopic mechanism. The side wall of the lifting block (12) is provided with an inclined surface (1201). The side wall of the lifting block (12) is fixedly connected to an installation plate (13). The laser emitter (14) and receiver (15) are installed on the installation plate (13). The side wall of each installation plate (13) is fixedly connected to a first connecting plate (16), and the two first connecting plates (16) are detachably connected.

2. The deformation detection device for building steel structures according to claim 1, characterized in that: The moving mechanism includes a guide rail (201) connected to the steel structure building (1), and a slider (202) is slidably connected on the guide rail (201). A connecting frame (203) is fixedly connected to the bottom of the slider (202), and the side wall of the connecting frame (203) is connected to the moving block (11) through a moving component. The movement of the slider (202) is driven by a driving component.

3. The deformation detection device for building steel structures according to claim 2, characterized in that: The drive assembly includes a fixed block (301) fixedly connected to the side wall of the slider (202), and a first motor (302) is fixedly connected to the side wall of the fixed block (301). A first roller (303) is fixedly connected to the output end of the first motor (302), and the first roller (303) rolls at the bottom of the steel structure building (1).

4. The deformation detection device for building steel structures according to claim 3, characterized in that: The moving component includes a threaded tube (401) fixedly connected to the side wall of the moving block (11), and a threaded rod (402) is threadedly connected inside the threaded tube (401). The other end of the threaded rod (402) is rotatably connected to the side wall of the connecting frame (203), and a second motor (403) is fixedly connected to the side wall of the connecting frame (203). The output end of the second motor (403) is fixed to one end of the threaded rod (402), and a guide component is provided between the connecting frame (203) and the moving block (11).

5. The deformation detection device for building steel structures according to claim 4, characterized in that: The guide assembly includes two first sleeves (501) fixedly connected to the side wall of the movable block (11), and a first sleeve rod (502) is inserted inside the first sleeve (501), the other end of the first sleeve rod (502) being fixed to the side wall of the connecting frame (203).

6. The deformation detection device for building steel structures according to claim 1, characterized in that: The telescopic mechanism includes two second sleeves (601) fixedly connected to the top of the moving block (11), and a second sleeve rod (602) is inserted into each second sleeve (601). The upper end of the second sleeve rod (602) is fixed to the bottom of the lifting block (12), and the second sleeve rod (602) is connected to the second sleeve (601) by a spring.

7. The deformation detection device for building steel structures according to claim 1, characterized in that: The side wall of the mounting plate (13) is provided with a cleaning mechanism for cleaning the optical light-emitting components of the laser emitter (14). The cleaning mechanism includes a support block (701) fixedly connected to the side wall of the mounting plate (13), and a second connecting plate (702) is fixedly connected to the side wall of the support block (701). A jet pipe (703) is fixedly inserted into the side wall of the second connecting plate (702), and an air supply assembly for driving the jet pipe (703) to jet.

8. The deformation detection device for building steel structures according to claim 7, characterized in that: The air supply assembly includes a U-shaped frame (801), and the U-shaped frame (801) is rotatably connected to the top of the support block (701) via a rotating rod. A fixed cylinder (802) is fixedly connected to the side wall of the U-shaped frame (801), and a piston (805) is slidably connected inside the fixed cylinder (802). An air inlet pipe (803) is fixedly inserted into the side wall of the fixed cylinder (802), and a jet pipe (703) is connected to the fixed cylinder (802) via a hose (804). A first one-way valve is provided inside the air inlet pipe (803), and a second one-way valve is provided inside the jet pipe (703). The piston (805) is connected to the fixed cylinder (802) via a reset assembly, and the piston (805) is pushed by a push assembly.

9. A deformation detection device for building steel structures according to claim 8, characterized in that: The reset assembly includes a first connecting block (901) fixedly connected to the side wall of the fixed cylinder (802), and the top of the first connecting block (901) is connected to a second connecting block (903) via a spring telescopic rod assembly (902), and the second connecting block (903) is fixed to the side wall of the piston (805).

10. A deformation detection device for building steel structures according to claim 8, characterized in that: The pushing assembly includes a second roller (1002), which is rotatably connected to the side wall of the U-shaped frame (801) via a rotating shaft (1001). A cam (1003) is fixedly connected to the end of the rotating shaft (1001), and the cam (1003) can slide on the top of the piston (805).

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