Reticulated shell structure local fire damage simulation device
By combining motors, gear systems, and automated control, high-precision fixing and multi-directional testing of the fire simulation device for reticulated shell structures have been achieved. This solves the problems of testing accuracy and repeatability of existing devices, provides real-time data support, and improves the accuracy and efficiency of fire resistance performance evaluation of reticulated shell structures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING CONSTR ENG COLLEGE CONSTR DESIGN RES INST
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-24
AI Technical Summary
Existing fire simulation devices for reticulated shell structures are difficult to achieve high-precision position adjustment and force control, resulting in poor accuracy and repeatability of test results. They also cannot fully simulate the complex forces exerted on the structure in actual fires, and the lack of an automated control system leads to low efficiency and inaccurate measurements.
By employing components such as motors, gear systems, racks, cylinders, and rollers, combined with an automated control system, the system achieves precise fixation and multi-directional testing of the mesh shell structure. Real-time pressure data is recorded through graduated grooves and threaded sleeves to ensure the stability and accuracy of the test.
It improves the accuracy and reliability of fire simulation testing of reticulated shell structures, enables a comprehensive assessment of their fire resistance performance, reduces human error, and provides real-time data support for design optimization.
Smart Images
Figure CN224163629U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of testing technology for reticulated shell structures, specifically a device for simulating local fire damage to reticulated shell structures. Background Technology
[0002] Grid shell structures are widely used in large-span buildings, such as stadiums, exhibition halls, and large shopping malls. These structures are susceptible to severe damage in the event of a fire, therefore, studying their local fire damage characteristics is of great significance. Existing fire simulation devices for grid shell structures have the following shortcomings:
[0003] Traditional testing devices typically employ manual adjustments or simple mechanical mechanisms to fix and test reticulated shell structures, making it difficult to achieve high-precision position adjustment and force control. This results in poor accuracy and repeatability of test results. Many existing devices can only test specific parts of the reticulated shell structure, failing to comprehensively simulate the complex forces exerted on the structure during an actual fire. This limits the assessment of the overall fire resistance performance of the structure.
[0004] Some devices still rely on manual operation, which is not only inefficient but also prone to human error. The lack of an automated control system makes long-term continuous testing difficult, and the measurement of the pressure on the reticulated shell structure is often not accurate enough, failing to provide real-time and intuitive pressure values, making it difficult to accurately assess the structure's resilience.
[0005] Therefore, it is necessary to propose a device for simulating local fire damage in reticulated shell structures to solve the above problems. Utility Model Content
[0006] (a) Technical problems to be solved
[0007] The purpose of this invention is to provide a device for simulating local fire damage to a reticulated shell structure, in order to solve the problem mentioned in the background art that the existing testing device can only be used for a specific type of reticulated shell structure and cannot test multiple types of reticulated shell structures, thus reducing the testing efficiency.
[0008] (II) Technical Solution
[0009] To achieve the above objectives, this utility model provides the following technical solution: a device for simulating localized fire damage to a reticulated shell structure, comprising a platform, a first motor fixedly mounted on the upper surface of the platform, a first gear fixedly connected to the output end of the first motor, a second gear meshing with the outer surface of the first gear, a gear fixedly connected to the lower surface of the second gear and penetrating the platform, racks symmetrically meshing with the outer surface of the gears, connecting rods symmetrically fixedly connected to the upper surfaces of the two racks, a fixed frame fixedly connected to the other end of the connecting rods, a cylinder fixedly connected to the inner wall of the fixed frame, a first slider fixedly connected to the other end of the cylinder, a second slider symmetrically and movably connected to the outer surface of the first slider, fixed clamps symmetrically and fixedly connected to the outer surfaces of the two second sliders, a rolling groove symmetrically fixedly mounted on the lower surface of the platform, a sliding groove symmetrically mounted on the upper surface of the platform, first rollers symmetrically and movably connected to the bottom of the inner wall of the rolling groove, connecting strips symmetrically and movably connected to the outer surfaces of the two first rollers, connecting columns symmetrically and fixedly connected to the outer surfaces of the two connecting strips, and first connecting columns symmetrically and fixedly connected to the outer surfaces of the two connecting columns.
[0010] Preferably, a rolling frame is provided above the device platform. Second rollers are symmetrically and movably connected to the inner wall of the rolling frame. A connecting frame is movably connected to the outer surface of the two second rollers. A second connecting column is fixedly connected to the top center of the connecting frame. An electric slider is fixedly connected to the top of the second connecting column. A threaded sleeve is fixedly connected to the bottom center of the connecting frame. A second motor is fixedly connected to one side of the bottom of the connecting frame. The outer surface of the threaded sleeve is provided with a groove and a scale groove. A threaded column is engaged with the inner wall of the threaded sleeve. A threaded gear is fixedly connected to the output end of the second motor. A pressing block is rotatably connected to the lower surface of the threaded column.
[0011] Preferably, the rolling frame is fixedly connected to the first connecting column, and the electric slider is attached to the upper surface of the rolling frame via a pulley.
[0012] Preferably, the first slider and the second slider are snap-fitted together, and the outer surface of the scale groove is engraved with pressure intensity.
[0013] Preferably, the threaded gear meshes with the threaded column, and the threaded column meshes with the threaded sleeve.
[0014] Preferably, the second slider is an isosceles right triangle, and the outer surface of the first slider is movably connected to the fixing frame.
[0015] (III) Beneficial Effects
[0016] Compared with the prior art, this utility model provides a device for simulating local fire damage to a reticulated shell structure, which has the following beneficial effects:
[0017] 1. The local fire damage simulation device for the reticulated shell structure, through the cooperation of the first motor, gear system and rack, can precisely adjust the position of the fixing clamp to adapt to reticulated shell structures of different models and sizes. This design ensures the stability of the reticulated shell structure during the test and improves the accuracy and reliability of the test.
[0018] 2. The local fire damage simulation device for the reticulated shell structure, through the first roller and the second roller, enables the extrusion block to test different positions of the reticulated shell structure. By using the combination of the first roller and the second roller, extrusion tests can be performed on different positions of the reticulated shell structure. This multi-directional testing method can more comprehensively simulate the various forces acting on the reticulated shell structure in an actual fire, thereby more accurately evaluating its fire resistance performance.
[0019] 3. The local fire damage simulation device for the reticulated shell structure, through the design of threaded sleeves and graduated grooves, allows for real-time observation and recording of the pressure intensity borne by the reticulated shell structure during the test. Through precise scale markings, operators can intuitively understand the tolerance of the reticulated shell structure, providing data support for subsequent design optimization. Attached Figure Description
[0020] Figure 1 This is a front view schematic diagram of the structure of this utility model;
[0021] Figure 2 This is a side sectional view of the structure of this utility model;
[0022] Figure 3 This is a top cross-sectional view of the structure of this utility model;
[0023] Figure 4 This is a cross-sectional view of the structural fixing frame of this utility model;
[0024] Figure 5 This is a cross-sectional schematic diagram of the threaded sleeve structure of this utility model;
[0025] Figure 6 This utility model Figure 5 Enlarged schematic diagram of the structure in area A;
[0026] Figure 7 This utility model Figure 5 Enlarged schematic diagram of the structure in region B.
[0027] In the diagram: 1. Device platform; 2. First motor; 3. First gear; 4. Second gear; 5. Third gear; 6. Rack; 7. Connecting rod; 8. Fixing frame; 9. Cylinder; 10. First slider; 11. Second slider; 12. Fixing clamp; 13. Rolling groove; 14. Sliding groove; 15. First roller; 16. Connecting rod; 17. First connecting column; 18. Rolling frame; 19. Second roller; 20. Electric slider; 21. Second motor; 22. Threaded gear; 23. Threaded sleeve; 24. Groove; 25. Scale groove; 26. Threaded column; 27. Extrusion block; 28. Second connecting column; 29. Connecting bar; 30. Connecting frame. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0029] Please see Figure 1-7 As shown, a device for simulating local fire damage to a reticulated shell structure includes a device platform 1. A first motor 2 is fixedly mounted on the upper surface of the device platform 1. A first gear 3 is fixedly connected to the output end of the first motor 2. A second gear 4 meshes with the outer surface of the first gear 3. A third gear 5 is fixedly connected to the lower surface of the second gear 4 and passes through the device platform 1. The position of the fixing clamp 12 can be adjusted by the cooperation of the third gear 5 and the rack 6.
[0030] The outer surface of the third gear 5 is symmetrically meshed with racks 6. The upper surfaces of the two racks 6 are symmetrically fixedly connected with connecting rods 7. The other end of the connecting rods 7 is fixedly connected with a fixing frame 8. The inner wall of the fixing frame 8 is fixedly connected with a cylinder 9. The cylinder 9 is used to open and close the fixing clamp 12. The other end of the cylinder 9 is fixedly connected with a first slider 10. The outer surface of the first slider 10 is movably connected to the fixing frame 8. The outer surface of the first slider 10 is symmetrically movably connected with a second slider 11. The second slider 11 is an isosceles right triangle. The inclined surface of the first slider 10 is movably connected to the inclined surface of the second slider 11. The outer surfaces of the two second sliders 11 are symmetrically fixedly connected with fixing clamps 12. The position of the fixing clamps 12 can be adjusted by the cooperation of the third gear 5 and the racks 6.
[0031] The lower surface of the device platform 1 is symmetrically provided with rolling grooves 13, and the upper surface of the device platform 1 is symmetrically provided with sliding grooves 14. The bottom of the inner wall of the rolling groove 13 is symmetrically and movably connected with first rollers 15. The position of the first connecting column 17 is adjusted by the first rollers 15. The outer surfaces of the two first rollers 15 are symmetrically and movably connected with connecting strips 29. The outer surfaces of the two connecting strips 29 are symmetrically and fixedly connected with connecting columns 16. The outer surfaces of the two connecting columns 16 are symmetrically and fixedly connected with first connecting columns 17. The upper part of the device platform 1 is provided with a rolling frame 18. The rolling frame 18 is fixedly connected with the first connecting column 17. The inner wall of the rolling frame 18 is symmetrically and movably connected with second rollers 19. The outer surfaces of the two second rollers 19 are movably connected with connecting frames 30. The top center of the connecting frame 30 is fixedly connected with a second connecting column 28. The top of the second connecting column 28 is fixedly connected with an electric slider 20. The position of the extrusion block 27 is adjusted by the electric slider 20. The electric slider 20 is in contact with the upper surface of the rolling frame 18 through the pulley.
[0032] A threaded sleeve 23 is fixedly connected to the bottom center of the connecting frame 30, and a second motor 21 is fixedly connected to one side of the bottom of the connecting frame 30. The outer surface of the threaded sleeve 23 is provided with a groove 24 and a scale groove 25. Through the cooperation of the threaded gear 22 and the threaded post 26, the endurance of the mesh shell structure can be tested more accurately. At the same time, the pressure that the mesh shell structure can withstand can be quickly and effectively determined by observing the display value on the scale groove 25. The pressure intensity is engraved on the outer surface of the scale groove 25. The inner wall of the threaded sleeve 23 is engaged with the threaded post 26. The threaded gear 22 and the threaded post 26 are engaged, and the threaded post 26 and the threaded sleeve 23 are engaged. The output end of the second motor 21 is fixedly connected to the threaded gear 22, and the lower surface of the threaded post 26 is rotatably connected to the pressing block 27.
[0033] Through the cooperation of the first motor 2, the gear system (first gear 3, second gear 4, third gear 5) and the rack 6, the position of the fixing clamp 12 can be precisely adjusted to adapt to different models and sizes of mesh shell structures. This design ensures the stability of the mesh shell structure during the test and improves the accuracy and reliability of the test.
[0034] Meanwhile, through the first roller 15 and the second roller 19, the extrusion block 27 can test different positions of the reticulated shell structure. By using the combination of the first roller 15 and the second roller 19, extrusion tests can be performed on different positions of the reticulated shell structure. This multi-directional testing method can more comprehensively simulate the various forces acting on the reticulated shell structure in actual fire, thereby more accurately evaluating its fire resistance performance.
[0035] The design of the threaded sleeve 23 and the graduated groove 25 allows for real-time observation and recording of the pressure intensity borne by the reticulated shell structure during testing. Through precise graduation markings, operators can intuitively understand the tolerance of the reticulated shell structure, providing data support for subsequent design optimization.
[0036] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.
[0037] Working principle: Before use, the operator first checks the device for any abnormalities. After confirming that there are no abnormalities, the power is turned on. The first motor 2 drives the first gear 3 to rotate, the first gear 3 drives the second gear 4 to rotate, and the second gear 4 drives the third gear 5 to rotate. The position of the rack 6 is adjusted, and the rack 6 drives the connecting rod 7 to move. The position of the fixing clamp 12 is adjusted to fix different models of mesh shell structures. The heated or burned mesh shell structure is placed into the fixing clamp 12. The cylinder 9 is controlled to retract, and the cylinder 9 drives the first slider 10 to move. Under the action of the fixing frame 8, the two second sliders 11 move closer to each other in the fixing groove of the fixing frame 8. At the same time, the fixing clamps 12, which are fixedly connected to the second sliders 11, move closer to each other until the clamps are closed. After the mesh shell structure is fixed, the first roller 15 is controlled to move to a suitable position. The first roller 15 drives the connecting strip 29 to move. Under the fixation of the connecting column 16, the connecting strip 29 drives the first connecting column 17 to move to a suitable position. Under the action of the second roller 19, the electric slider 20 drives the second connecting column 28 to move to a suitable position on the rolling frame 18. The second connecting column 28 drives the connecting frame 30 to move to a suitable position. At this time, the second motor 21 rotates and drives the threaded gear 22 to rotate. The threaded gear 22 rotates and extends in the threaded sleeve 23, moving the extrusion block 27 towards the mesh shell structure to test the mesh shell structure. At this time, the withstand capability of the mesh shell structure can be accurately understood by observing the pressure value on the scale groove 25.
[0038] In summary, the device is equipped with automated components such as the electric slider 20 and the cylinder 9, which can automatically adjust the position and movement of each component through the control system. This not only improves the efficiency of testing but also reduces errors that may be caused by human operation, ensuring the consistency and repeatability of test results. During the testing process, since all operations are automatically controlled by the control system, the safety risks caused by human factors are greatly reduced.
[0039] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A device for simulating localized fire damage to a reticulated shell structure, comprising a device platform (1), characterized in that: A first motor (2) is fixedly mounted on the upper surface of the device platform (1). A first gear (3) is fixedly connected to the output end of the first motor (2). A second gear (4) meshes with the outer surface of the first gear (3). A third gear (5) is fixedly connected to the lower surface of the second gear (4) and passes through the device platform (1). A rack (6) is symmetrically meshed with the outer surface of the third gear (5). A connecting rod (7) is symmetrically fixedly connected to the upper surfaces of the two racks (6). A fixing frame (8) is fixedly connected to the other end of the connecting rod (7). A cylinder (9) is fixedly connected to the inner wall of the fixing frame (8). A first slider (10) is fixedly connected to the other end of the cylinder (9). The outer surface of the first slider (10) is symmetrically and movably connected to the second slider (11), and the outer surfaces of the two second sliders (11) are symmetrically and fixedly connected to the fixing clamps (12). The lower surface of the device platform (1) is symmetrically and fixedly provided with a rolling groove (13), and the upper surface of the device platform (1) is symmetrically provided with a sliding groove (14). The bottom of the inner wall of the rolling groove (13) is symmetrically and movably connected to the first roller (15). The outer surfaces of the two first rollers (15) are symmetrically and movably connected to the connecting strips (29). The outer surfaces of the two connecting strips (29) are symmetrically and fixedly connected to the connecting posts (16), and the outer surfaces of the two connecting posts (16) are symmetrically and fixedly connected to the first connecting posts (17).
2. The device for simulating localized fire damage to a reticulated shell structure according to claim 1, characterized in that: A rolling frame (18) is provided above the device platform (1). The inner wall of the rolling frame (18) is symmetrically and movably connected with second rollers (19). The outer surfaces of the two second rollers (19) are movably connected with a connecting frame (30). The top center of the connecting frame (30) is fixedly connected with a second connecting column (28). The top of the second connecting column (28) is fixedly connected with an electric slider (20). The bottom center of the connecting frame (30) is fixedly connected with a threaded sleeve (23). The bottom side of the connecting frame (30) is fixedly connected with a second motor (21). The outer surface of the threaded sleeve (23) is provided with a groove (24) and a scale groove (25). The inner wall of the threaded sleeve (23) is engaged with a threaded column (26). The output end of the second motor (21) is fixedly connected with a threaded gear (22). The lower surface of the threaded column (26) is rotatably connected with an extrusion block (27).
3. The device for simulating localized fire damage to a reticulated shell structure according to claim 2, characterized in that: The rolling frame (18) is fixedly connected to the first connecting column (17), and the electric slider (20) is attached to the upper surface of the rolling frame (18) through a pulley.
4. The device for simulating localized fire damage to a reticulated shell structure according to claim 2, characterized in that: The inclined surface of the first slider (10) is movably connected to the inclined surface of the second slider (11), and the outer surface of the scale groove (25) is engraved with pressure intensity.
5. The device for simulating localized fire damage to a reticulated shell structure according to claim 2, characterized in that: The threaded gear (22) meshes with the threaded column (26), and the threaded column (26) meshes with the threaded sleeve (23).
6. The device for simulating localized fire damage to a reticulated shell structure according to claim 1, characterized in that: The second slider (11) is an isosceles right triangle, and the outer surface of the first slider (10) is movably connected to the fixing frame (8).