Composite floor fire-resistant bearing capacity testing device based on thin film effect

Abstract

The utility model discloses a composite floor fire-resistant bearing capacity testing device based on a thin film effect, which relates to the technical field of building material testing and comprises a bearing plate, a positioning groove is formed in the middle of the upper surface of the bearing plate, a composite floor is movably connected to the inner wall of the positioning groove, and mounting plates are symmetrically and fixedly mounted on the lower surface of the bearing plate. Mounting rods are rotatably mounted on the inner walls of the mounting plates, movable plates are fixedly mounted on the outer walls of the two mounting rods, and positioning rods are fixedly mounted at the ends of the two movable plates. According to the utility model, the ignition hole in the middle of the bearing plate allows a fire source to be led in, the composite floor is directly heated and a real fire environment is simulated, and the hydraulic column drives the pressing plate to press downwards, so that the fire-resistant bearing capacity of the composite floor is tested, and the improvement effect of a thin film effect on the performance of the composite floor is considered in the test process; the pressure sensor at the bottom of the pressing plate can monitor and record the pressure value in real time, and accurate data support is provided for evaluating the bearing capacity of the composite floor at the high temperature.

Description

Technical Field

[0001] This utility model relates to the field of building material testing technology, and more specifically to a test device for the fire resistance bearing capacity of composite floor slabs based on the thin film effect. Background Technology

[0002] In the construction industry, composite floor slabs are a common structural component. Their fire resistance and load-bearing capacity are crucial for ensuring the safety and stability of buildings, especially in extreme situations such as fires. Whether composite floor slabs can maintain sufficient load-bearing capacity directly affects the success rate of personnel evacuation and fire rescue. However, traditional composite floor slab testing devices often can only simulate performance at normal or lower temperatures and cannot accurately assess their actual behavior in high-temperature environments.

[0003] The film effect refers to the phenomenon where, under high-temperature conditions such as fire, the evaporation of moisture inside a composite floor slab creates vapor pressure, thereby increasing its load-bearing capacity and fire resistance. This effect plays a crucial role in actual fires, but it is often overlooked in existing testing equipment and methods.

[0004] While existing technologies offer some testing equipment and methods for the high-temperature resistance of building materials, these devices typically focus on the material's thermal stability or combustion characteristics and cannot comprehensively reflect the mechanical response and load-bearing capacity of composite floor slabs in actual fire scenarios. Furthermore, these testing methods often neglect the impact of key factors such as the membrane effect on the performance of composite floor slabs.

[0005] Therefore, it is necessary to propose a composite floor fire resistance bearing capacity testing device based on the membrane effect to solve the above problems. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] The purpose of this invention is to address the problem that existing equipment typically focuses on the thermal stability or combustion characteristics of materials and cannot fully reflect the mechanical response and load-bearing capacity of composite floor slabs in actual fire scenarios. This invention provides a composite floor slab fire resistance load-bearing capacity testing device based on the membrane effect.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0010] A composite floor slab fire resistance bearing capacity testing device based on the membrane effect includes a receiving plate with a fire ignition hole in the middle and a positioning groove in the middle of the upper surface of the receiving plate. A composite floor slab is movably connected to the inner wall of the positioning groove. Mounting plates are symmetrically fixedly installed on the lower surface of the receiving plate. Mounting rods are rotatably installed on the inner walls of multiple mounting plates. Movable plates are fixedly installed on the outer walls of two mounting rods. Positioning rods are fixedly installed at the ends of the two movable plates. Baffles are symmetrically fixedly installed at the ends of the two positioning rods. Sleeves are symmetrically movably connected to the outer surfaces of the two positioning rods. Vertical plates are symmetrically fixedly installed on the upper surface of the receiving plate. Limiting rods are fixedly installed on the outer walls of multiple vertical plates. Extension plates are movably connected to the outer surfaces of multiple limiting rods. A motor is provided at the bottom of one side of the outer wall of multiple extension plates. A connecting plate is fixedly installed on one side of the inner wall of multiple sleeves.

[0011] Furthermore, the output shaft ends of multiple motors are fixedly connected to the connecting plate, and support plates are symmetrically fixedly installed on the lower surface of the receiving plate. The multiple support plates are distributed in a rectangular array, which helps to improve the stability of the device.

[0012] Furthermore, positioning plates are fixedly installed at the ends of the plurality of limiting rods, and positioning holes are provided on one outer wall of the plurality of extension plates. The positioning holes enable the extension plates to move horizontally along the limiting rods.

[0013] Furthermore, rectangular plates are symmetrically fixedly installed on the outer walls of the two movable plates, and fixed plates are symmetrically fixedly installed on the upper surface of the receiving plate, with multiple rectangular plates corresponding one-to-one with the fixed plates.

[0014] Furthermore, a tension spring is provided on one lower surface of one side of the plurality of fixing plates, rectangular grooves are symmetrically opened on the outer wall of the plurality of sleeves, and hydraulic columns are symmetrically provided in the middle of the upper surface of the receiving plate.

[0015] Furthermore, the output ends of the two hydraulic columns are fixedly connected to a top plate, and the inner wall of the top plate is provided with a connecting rod.

[0016] Furthermore, a pressure plate is provided on the outer surface of the connecting rod.

[0017] (III) Beneficial Effects

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. This utility model achieves precise support and positioning of the composite floor slab by setting a positioning groove on the upper surface of the receiving plate. This design allows the composite floor slab to move horizontally along the receiving plate, facilitating testing at different positions. The cooperation of the mounting plate and the mounting rod provides movable support for the movable plate, allowing it to rotate and swing along the receiving plate. This structure not only increases the flexibility of the device but also better adapts to composite floor slabs of different sizes.

[0020] 2. This utility model significantly improves the support stability of the entire device by setting multiple support plates arranged in a rectangular array on the lower surface of the receiving plate. This design ensures that the device is not easily deformed or damaged during high-temperature testing. The positioning plate at the end of the limiting rod cooperates with the positioning hole on the outer side wall of the extension plate to achieve precise control of the horizontal movement of the extension plate, thereby improving the accuracy of the test. The one-to-one correspondence design between the rectangular plate and the fixed plate, combined with the force of the tension spring, ensures that multiple sleeves can fit tightly against the combined floor slab, improving the stability during the transportation process.

[0021] 3. In this utility model, the fire-starting hole in the middle of the receiving plate allows the introduction of a fire source to directly heat the composite floor slab, simulating a real fire environment. At the same time, the hydraulic column drives the pressure plate to press down, realizing the test of the fire resistance bearing capacity of the composite floor slab. During the test, the effect of the membrane effect on the performance of the composite floor slab is fully considered. The pressure sensor at the bottom of the pressure plate can monitor and record the pressure value in real time, providing accurate data support for evaluating the load-bearing capacity of the composite floor slab at high temperatures. Attached Figure Description

[0022] Figure 1 This is a three-dimensional front view of the structure of this utility model;

[0023] Figure 2 This is a three-dimensional bottom view of the structure of this utility model;

[0024] Figure 3 This is a partial three-dimensional side view of the structure of this utility model;

[0025] Figure 4 This is a partial three-dimensional sectional view of the structure of this utility model;

[0026] Figure 5 This utility model Figure 2 Enlarged schematic diagram of the structure in area A.

[0027] Reference numerals: 1. Receiving plate; 2. Positioning groove; 3. Composite floor slab; 4. Mounting plate; 5. Mounting rod; 6. Movable plate; 7. Positioning rod; 8. Baffle; 9. Sleeve; 10. Vertical plate; 11. Limiting rod; 12. Extension plate; 13. Motor; 14. Connecting plate; 15. Support plate; 16. Positioning plate; 17. Positioning hole; 18. Rectangular plate; 19. Fixing plate; 20. Tension spring; 21. Rectangular groove; 22. Hydraulic column; 23. Top plate; 24. Connecting rod; 25. Pressure plate; 27. Ignition hole. 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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1

[0030] Please see Figure 1-5 A composite floor slab fire resistance bearing capacity testing device based on the membrane effect includes a receiving plate 1. A positioning groove 2 is formed in the middle of the upper surface of the receiving plate 1. A composite floor slab 3 is movably connected to the inner wall of the positioning groove 2. Mounting plates 4 are symmetrically fixedly installed on the lower surface of the receiving plate 1. Mounting rods 5 are rotatably installed on the inner walls of multiple mounting plates 4. Movable plates 6 are fixedly installed on the outer walls of two mounting rods 5. Positioning rods 7 are fixedly installed at the ends of two movable plates 6. Baffles 8 are symmetrically fixedly installed at the ends of two positioning rods 7. Sleeves 9 are symmetrically movably connected to the outer surfaces of two positioning rods 7. Vertical plates 10 are symmetrically fixedly installed on the upper surface of the receiving plate 1. Limiting rods 11 are fixedly installed on the outer walls of multiple vertical plates 10. Extension plates 12 are movably connected to the outer surfaces of multiple limiting rods 11. A motor 13 is provided at the bottom of one side of the outer wall of multiple extension plates 12. A connecting plate 14 is fixedly installed on one side of the inner wall of multiple sleeves 9.

[0031] In this embodiment, a positioning groove 2 is provided on the upper surface of the receiving plate 1 to support and position the combined floor slab 3, enabling the combined floor slab 3 to move horizontally along the receiving plate 1. During this process, an mounting plate 4 is provided on the lower surface of the receiving plate 1, and with the cooperation of the mounting rod 5, it is used to support the movable plate 6, allowing the movable plate 6 to rotate and swing along the receiving plate 1, and simultaneously driving the positioning rod 7 to move, so that multiple sleeves 9 can move horizontally along the baffle 8. At the same time, a vertical plate 10 is provided on the upper surface of the receiving plate 1, and with the cooperation of the limiting rod 11, it is used to position the extension plate 12, and simultaneously driving the motor 13 to move. By starting the motor 13, and with the cooperation of the connecting plate 14, the sleeves 9 are driven to rotate, which is used to drive the combined floor slab 3 horizontally. By adjusting the spacing of the sleeves 9, the practicality of the device can be effectively improved, and it is suitable for combined floor slabs 3 of various sizes and specifications.

[0032] Example 2

[0033] Please see Figure 1-5 This embodiment is a further optimization based on embodiment 1. Specifically, the receiving plate 1 has an ignition hole 27 in the middle, the output shaft ends of multiple motors 13 are fixedly connected to the connecting plate 14, the lower surface of the receiving plate 1 is symmetrically fixedly mounted with support plates 15, and the multiple support plates 15 are distributed in a rectangular array, which helps to improve the support stability of the device. The ends of multiple limit rods 11 are fixedly mounted with positioning plates 16, and the outer wall of one side of multiple extension plates 12 is provided with positioning holes 17. Through the setting of positioning holes 17, the extension plates 12 can move horizontally along the limit rods 11.

[0034] Rectangular plates 18 are symmetrically fixedly installed on the outer walls of the two movable plates 6. Fixed plates 19 are symmetrically fixedly installed on the upper surface of the receiving plate 1. Multiple rectangular plates 18 correspond one-to-one with fixed plates 19. Tension springs 20 are provided on the lower surface of one side of multiple fixed plates 19. Rectangular grooves 21 are symmetrically opened on the outer walls of multiple sleeves 9. Hydraulic columns 22 are symmetrically provided in the middle of the upper surface of the receiving plate 1. Top plates 23 are fixedly connected to the output ends of the two hydraulic columns 22. Connecting rods 24 are fixedly connected to the inner wall of the top plate 23. Pressure plates 25 are fixedly connected to the outer surface of the connecting rods 24. Pressure sensors are installed at the bottom of the pressure plates 25.

[0035] In this embodiment, multiple support plates 15 are arranged in a rectangular array on the lower surface of the receiving plate 1 to support and fix the device. In actual use, rectangular plates 18 are set on the outer wall of the movable plate 6 and are connected and fixed to the tension spring 20 through one-to-one cooperation with the fixed plate 19. The force of the tension spring 20 is used to drive multiple sleeves 9 to keep them in close contact with the composite floor slab 3. The cooperation of the rectangular groove 21 helps to improve the stability of conveying the composite floor slab 3. At the same time, a fire source is introduced into the fire hole 27 in the middle of the receiving plate 1 to heat the composite floor slab 3. Then, the hydraulic column 22 drives the pressure plate 25 to press down, realizing the fire resistance bearing capacity test device of the composite floor slab 3. The pressure sensor at the bottom of the pressure plate 25 monitors the pressure value. The pressure sensor at the bottom of the pressure plate 25 can monitor and record the pressure value in real time, providing accurate data support for evaluating the bearing capacity of the composite floor slab 3 at high temperature. This function helps to understand the performance of the composite floor slab more deeply, including the influence of the membrane effect on its bearing capacity.

[0036] In summary, this utility model achieves precise support and positioning of the combined floor slab 3 by setting a positioning groove 2 on the upper surface of the receiving plate 1. This design allows the combined floor slab 3 to move horizontally along the receiving plate 1, facilitating testing at different positions. The cooperation of the mounting plate 4 and the mounting rod 5 provides movable support for the movable plate 6, enabling it to rotate and swing along the receiving plate 1. This structure not only increases the flexibility of the device but also better adapts to combined floor slabs 3 of different sizes. By setting multiple sleeves 9 and baffles 8, horizontal driving of the combined floor slab 3 is achieved. At the same time, by adjusting the spacing between the sleeves 9, the practicality of the device can be effectively improved, making it suitable for combined floor slabs 3 of various specifications. The design of the vertical plate 10 and the limiting rod 11 is used to position the movement of the extension plate 12, ensuring the stability of the device. The introduction of the motor 13 enables the rotational driving of the sleeves 9 through the connecting plate 14, further improving testing efficiency.

[0037] By setting multiple support plates 15 arranged in a rectangular array on the lower surface of the receiving plate 1, the support stability of the entire device is significantly improved. This design ensures that the device is not easily deformed or damaged during high-temperature testing. The positioning plate 16 at the end of the limiting rod 11 cooperates with the positioning hole 17 on the outer side wall of the extension plate 12 to achieve precise control of the horizontal movement of the extension plate 12, thereby improving the accuracy of the test. The one-to-one correspondence design between the rectangular plate 18 and the fixing plate 19, combined with the force of the tension spring 20, ensures that the multiple sleeves 9 can fit tightly against the combined floor slab 3, improving the stability during the transportation process.

[0038] The ignition hole 27 in the middle of the receiving plate 1 allows a fire source to be introduced, directly heating the composite floor slab 3 to simulate a real fire environment. Simultaneously, the hydraulic column 22 drives the pressure plate 25 downwards, enabling the testing of the fire resistance capacity of the composite floor slab 3. During the test, the effect of the membrane effect on the performance of the composite floor slab is fully considered. The pressure sensor at the bottom of the pressure plate 25 can monitor and record pressure values ​​in real time, providing accurate data support for evaluating the load-bearing capacity of the composite floor slab 3 at high temperatures. This function helps to gain a deeper understanding of the performance of the composite floor slab, including the impact of the membrane effect on its load-bearing capacity.

[0039] The above are merely preferred embodiments of this utility model and are not intended to limit this utility model. The scope of patent protection of this utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of this utility model shall also be included within the scope of protection of this utility model.

Claims

1. A thin film effect based combined floor fire resistance load bearing capacity testing device comprising a receiving plate (1), characterized in that: A ignition hole (27) is provided in the middle of the receiving plate (1), a positioning groove (2) is provided in the middle of the upper surface of the receiving plate (1), a combined floor slab (3) is movably connected to the inner wall of the positioning groove (2), mounting plates (4) are symmetrically fixedly installed on the lower surface of the receiving plate (1), mounting rods (5) are rotatably installed on the inner walls of multiple mounting plates (4), movable plates (6) are fixedly installed on the outer walls of two mounting rods (5), and positioning rods (7) are fixedly installed at the ends of the two movable plates (6). 7) is symmetrically fixedly installed with baffles (8), and sleeves (9) are symmetrically movably connected to the outer surfaces of the two positioning rods (7). Vertical plates (10) are symmetrically fixedly installed on the upper surface of the receiving plate (1). Limiting rods (11) are fixedly installed on the outer walls of multiple vertical plates (10). Extension plates (12) are movably connected to the outer surfaces of multiple limiting rods (11). A motor (13) is provided at the bottom of one side of the outer wall of multiple extension plates (12). A connecting plate (14) is fixedly installed on one side of the inner wall of multiple sleeves (9).

2. The testing device for fire resistance load bearing capacity of composite floor based on membrane effect according to claim 1, characterized in that: The output shaft ends of the multiple motors (13) are fixedly connected to the connecting plate (14), and the lower surface of the receiving plate (1) is symmetrically fixedly equipped with support plates (15).

3. The testing device for fire resistance load bearing capacity of composite floor based on membrane effect according to claim 1, characterized in that: Positioning plates (16) are fixedly installed at the ends of the plurality of limiting rods (11), and positioning holes (17) are provided on one side of the outer wall of the plurality of extension plates (12).

4. The testing device for fire resistance load bearing capacity of composite floor based on membrane effect according to claim 1, characterized in that: Rectangular plates (18) are symmetrically fixedly installed on the outer walls of the two movable plates (6), and fixed plates (19) are symmetrically fixedly installed on the upper surface of the receiving plate (1).

5. The testing device for fire resistance load bearing capacity of composite floor based on membrane effect according to claim 4, characterized in that: Tension springs (20) are provided on one side of the lower surface of the plurality of fixing plates (19), rectangular grooves (21) are symmetrically opened on the outer wall of the plurality of sleeves (9), and hydraulic columns (22) are symmetrically provided in the middle of the upper surface of the receiving plate (1).

6. The fire resistance bearing capacity testing device for composite floor slabs based on the membrane effect according to claim 5, characterized in that: The output ends of the two hydraulic columns (22) are fixedly connected to a top plate (23), and the inner wall of the top plate (23) is provided with a connecting rod (24).

7. The testing device for fire resistance load bearing capacity of composite floor based on membrane effect according to claim 6, characterized in that: The outer surface of the connecting rod (24) is provided with a pressure plate (25).

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