Loading device for fire test of composite floor

Abstract

The utility model relates to building structure fire resistance test technical field, and disclose a kind of composite floor fire test loading device, the composite floor fire test loading device includes experimental furnace, experimental furnace is provided with experimental assembly, experimental assembly includes support frame;The composite floor fire test loading device, to make the device, by being provided with experimental assembly, the component cooperation support frame provides stable support for experimental floor, sandbag on wood bracket applies uniform load according to design requirement, both simulate actual use working condition of floor, avoid sandbag direct contact high-temperature floor to lead to damage, vibration motor passes through long plate transmission vibration, simulate vibration effect of building structure in fire, make test more close to actual fire working condition, concrete residue generated in fire test is guided by inclined plate, fall into collection frame and collection box by discharge slot, limiting block can be adjusted collection position along limiting groove sliding, ensure that residue is not missed, reduce cleaning workload after test.

Description

Technical Field

[0001] This utility model relates to the field of fire resistance testing technology for building structures, specifically a loading device for fire testing of composite floor slabs. Background Technology

[0002] In the field of fire resistance research of building structures, composite floor slabs are the core components of prefabricated assembled buildings. Their mechanical properties under fire directly determine the fire safety level of the building. Therefore, in order to ensure the performance of composite floor slabs, it is necessary to use composite floor slab fire test loading devices to conduct fire tests on composite floor slabs.

[0003] The existing composite floor slab fire test loading device consists of a graded loading module, a high-temperature adaptive support structure, a multi-dimensional data acquisition unit, and an intelligent control system. According to the test design load, a uniformly distributed load is applied to the surface of the composite floor slab through sandbags. The wooden bracket isolates the sandbags from the high temperature and protects them. The support structure fixes the floor slab specimen and is adapted to the fire furnace environment. During the fire test, the data acquisition unit simultaneously captures the temperature field distribution, composite surface strain, and floor slab deformation data. The control system transmits and stores the test data in real time.

[0004] However, when using the above-mentioned devices, the heavy objects are usually placed directly on the surface of the floor slab, resulting in uneven load distribution. Furthermore, the heavy objects tend to stick to the floor slab at high temperatures, making it impossible to simulate the uniformly distributed load scenario in actual use. Therefore, we propose a composite floor slab fire test loading device. Utility Model Content

[0005] The purpose of this invention is to provide a fire test loading device for composite floor slabs to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A fire testing loading device for composite floor slabs includes a test furnace, an integrated burner assembly fixedly installed inside the test furnace, a support fixedly installed at the bottom of the test furnace, and test components mounted on the test furnace, the test components including: A support frame is fixedly installed inside the experimental furnace. An experimental floor is placed on the support frame. A wooden bracket is placed on the experimental floor. Sandbags are placed on the wooden bracket. An inclined plate is fixedly installed inside the experimental furnace. A long plate is fixedly installed on the inclined plate. A vibration motor is fixedly installed on the top of the long plate. One end of a spring rod is fixedly installed on the bottom of the long plate. A rubber pad is fixedly installed on the other end of the spring rod. The experimental furnace is provided with an empty slot, a discharge slot and a limiting slot. A limiting block is slidably installed on the experimental furnace, a collection rack is fixedly installed on the limiting block, and a collection box is fixedly installed on the collection rack.

[0007] In a further embodiment, multiple sets of sandbags, long plates, vibrating motors, spring rods, rubber pads, and empty slots are provided.

[0008] In a further embodiment, the inclined plate is positioned below the support frame, the long plate is positioned inside the slot, and the rubber pad is attached to the ground.

[0009] In a further embodiment, the discharge chute is directly opposite the collection rack, the collection rack is located below the collection box, and the limiting block slides inside the limiting groove.

[0010] In a further embodiment, the collection rack is provided with an auxiliary component, which includes a mounting block. The mounting block is fixedly installed at the bottom of the collection box, and a ball is hingedly installed on the mounting block. A hinge frame is fixedly installed on the collection rack, and one end of a spring is fixedly installed inside the hinge frame. A thin rod is fixedly installed on the other end of the spring, and a cover plate is fixedly installed on the thin rod. A baffle is fixedly installed on the collection rack, and a handle is fixedly installed on the collection rack.

[0011] In a further embodiment, multiple sets of the mounting block, sphere, and baffle are provided, with the sphere conforming to the ground.

[0012] In a further embodiment, the baffle is positioned below the cover plate, and the cover plate is positioned above the discharge chute.

[0013] Compared with the prior art, this utility model provides a loading device for fire testing of composite floor slabs, which has the following beneficial effects: 1. This composite floor slab fire test loading device, in order to enable the device, is equipped with an experimental component, which, together with the support frame, provides stable support for the experimental floor slab. Sandbags on the wooden bracket apply uniformly distributed loads as required by the design, which not only simulates the actual use conditions of the floor slab, but also avoids the sandbags directly contacting the high-temperature floor slab and causing damage. The vibration motor transmits vibration through the long plate to simulate the vibration effect of the building structure in a fire, making the test closer to the actual fire conditions. The concrete residue generated in the fire test is guided by the inclined plate and falls into the collection rack and collection box through the discharge chute. The limiting block slides along the limiting groove to adjust the collection position, ensuring that no residue is missed and reducing the amount of cleanup work after the test.

[0014] 2. This composite floor slab fire test loading device, in order to ensure the efficient conduct of fire resistance tests on composite floors, incorporates an auxiliary component. This component, in conjunction with the mounting block and sphere at the bottom of the collection box, converts sliding friction into rolling friction, reducing the resistance to movement of the collection box and facilitating the quick removal and cleaning of residue. A spring-driven mechanism on the hinged frame rotates the thin rod and the cover plate. During the test, the cover plate closes under the action of the spring-driven mechanism and can be manually opened after the test to prevent uncooled residue from splashing or heat from leaking out, ensuring the safety of test personnel. A baffle limits the cover plate, ensuring a stable opening angle and preventing residue from scattering outside the collection box. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective; Figure 3 This is a cross-sectional view of the overall structure of this utility model; Figure 4 This is a schematic diagram of part of the structure of this utility model; Figure 5 This is a cross-sectional view of part of the structure of this utility model; Figure 6 This is a cross-sectional view of part of the structure of this utility model from another perspective; Figure 7 This is a schematic diagram of the internal structure of the experimental furnace of this utility model; Figure 8 This is a schematic cross-sectional view of part of the structure of this utility model; Figure 9 This utility model Figure 8 Enlarged structural diagram of region A in the middle; Figure 10 This is a cross-sectional view of the collection box structure of this utility model.

[0016] Explanation of icon numbers: 1. Experimental furnace; 2. Integrated burner assembly; 3. Support; 4. Experimental components; 41. Support frame; 42. Experimental floor slab; 43. Wooden bracket; 44. Sandbag; 45. Inclined plate; 46. Long plate; 47. Vibration motor; 48. Spring rod; 49. Rubber pad; 410. Empty trough; 411. Discharge trough; 412. Limiting groove; 413. Limiting block; 414. Collection rack; 415. Collection box; 5. Auxiliary components; 51. Mounting block; 52. Ball; 53. Hinge frame; 54. Clockwork spring; 55. Thin rod; 56. Cover plate; 57. Baffle; 58. Handle. Detailed Implementation

[0017] 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.

[0018] In this application, the term "above" indicates the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is primarily used to better describe this application and its embodiments, and is not intended to limit the indicated device, element, or component to having a specific orientation, or to construct and operate in a specific orientation. Furthermore, the term "above" may also be used in certain circumstances to indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.

[0019] Please see Figures 1-10 This utility model provides a technical solution: A fire test loading device for composite floor slabs includes a test furnace 1, an integrated burner assembly 2 fixedly installed inside the test furnace 1, and a support 3 fixedly installed at the bottom of the test furnace 1.

[0020] In one embodiment of this utility model, an experimental component 4 is provided on the experimental furnace 1. The experimental component 4 includes a support frame 41, which is fixedly installed inside the experimental furnace 1. An experimental floor 42 is placed on the support frame 41, a wooden bracket 43 is placed on the experimental floor 42, and sandbags 44 are placed on the wooden bracket 43. An inclined plate 45 is fixedly installed inside the experimental furnace 1, and a long plate 46 is fixedly installed on the inclined plate 45. A vibration motor 47 is fixedly installed above the long plate 46, and one end of a spring rod 48 is fixedly installed at the bottom of the long plate 46. A rubber pad 49 is fixedly installed at the other end of the spring rod 48. A slot 4 is opened on the experimental furnace 1. 10. The discharge chute 411 and the limiting groove 412 are slidably installed on the experimental furnace 1. The limiting block 413 is fixedly installed on the limiting block 413 and the collecting rack 414 is fixedly installed on the collecting rack 414. Multiple sets of sandbags 44, long plates 46, vibration motors 47, spring rods 48, rubber pads 49 and empty grooves 410 are provided. Inclined plates 45 are set below the support frame 41. Long plates 46 are set inside the empty grooves 410. Rubber pads 49 are attached to the ground. The discharge chute 411 is directly opposite the collecting rack 414. The collecting rack 414 is set below the collecting box 415. The limiting block 413 slides inside the limiting groove 412.

[0021] In this embodiment, before the test, the test floor slab 42 is placed on the support frame 41. A wooden bracket 43 is laid on the test floor slab 42 according to the designed load. Sandbags 44 are then placed on the wooden bracket 43 to apply a uniform load. The wooden bracket 43 prevents the sandbags 44 from directly contacting the high-temperature test floor slab 42 and causing damage, while also providing space for water vapor diffusion, thus mimicking the stress and environmental conditions of a real fire. The integrated burner assembly 2 is started to simulate the high temperature of a fire, and simultaneously the vibration motor 47 on the long plate 46 is started. The vibration is transmitted through the long plate 46 and the inclined plate 45 to the support frame 41 and the test floor slab. Floor slab 42 simulates the vibration effect of building structure during fire, making the test closer to actual working conditions. The spring rod 48 and rubber pad 49 at the bottom of the long plate 46 buffer the impact of the vibration motor 47 during operation, avoiding the vibration from affecting the stability of the experimental furnace 1. During the fire test, the concrete residue generated by the experimental floor slab 42 falls onto the inclined plate 45, is guided by the inclined plate 45, falls through the discharge chute 411 into the collection rack 414, and finally collects in the collection box 415. The position of the collection rack 414 can be adjusted by sliding the limiting block 413 along the limiting groove 412 to ensure that no residue is missed and reduce the amount of cleaning work after the test.

[0022] In one embodiment of this utility model, an auxiliary component 5 is provided on the collection rack 414. The auxiliary component 5 includes a mounting block 51, which is fixedly installed on the bottom of the collection box 415. A ball 52 is hingedly installed on the mounting block 51. A hinge frame 53 is fixedly installed on the collection rack 414. One end of a spring 54 is fixedly installed inside the hinge frame 53. A thin rod 55 is fixedly installed on the other end of the spring 54. A cover plate 56 is fixedly installed on the thin rod 55. A baffle 57 is fixedly installed on the collection rack 414. A handle 58 is fixedly installed on the collection rack 414. Multiple sets of mounting blocks 51, balls 52, and baffles 57 are provided. The balls 52 are in contact with the ground. The baffles 57 are located below the cover plate 56. The cover plate 56 is located above the discharge chute 411.

[0023] In this embodiment, during the test, the spring 54 on the hinge frame 53 is in a pre-tensioned state, driving the thin rod 55 and the cover plate 56 to rotate to the closed state, covering the bottom of the discharge trough 411 to prevent uncooled concrete residue from splashing or the high temperature heat in the experimental furnace 1 from leaking out, avoiding burns to the test personnel and ensuring operational safety. After the test, the cover plate 56 is manually rotated to open, and the spring 54 is charged. At this time, the collection frame 414 can be pulled by the handle 58, and the ball 52 on the bottom mounting block 51 of the collection box 415 rolls against the ground, converting sliding friction into rolling friction, greatly reducing the moving resistance, and making it easy to quickly move the collection box 415 out of the experimental furnace 1 for residue cleaning. The baffle 57 limits the cover plate 56 to ensure that the opening angle of the cover plate 56 is stable, preventing residue from falling outside the collection box 415 and further improving the integrity of residue collection.

[0024] All electrical components appearing in this application are electrically connected to the controller and 220V AC mains power. The controller is a conventional and known device that can control the experimental furnace 1, the integrated burner assembly 2, and the vibration motor 47. The signal interaction of each component adopts the PLC control protocol commonly used in industrial equipment, which is common knowledge to those skilled in the art and can be implemented without further detailed description. The control logic and signal interaction method are existing technologies and will not be described in detail. All standard parts used in this application can be purchased from the market. The specific connection methods of each part are all connected using conventional methods such as riveting and welding that are mature in the prior art. The standard parts are all of conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art.

[0025] It should be noted that the above electrical components are all existing technology products. Those skilled in the art should select, install, and complete the circuit debugging work according to the needs of use to ensure that each electrical appliance can work normally. The components are all general standard parts or components known to those skilled in the art. Their structure and principle can be known by those skilled in the art through technical manuals or conventional experimental methods. No specific restrictions are made here. The supporting structures of the hydraulic drive structure appearing in this application document, such as hydraulic tanks and hydraulic pumps, are existing equipment and will not be described in detail here.

[0026] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A fire test loading device for composite floor slabs, comprising a test furnace (1), wherein an integrated burner assembly (2) is fixedly installed inside the test furnace (1), and a support (3) is fixedly installed at the bottom of the test furnace (1), characterized in that: The experimental furnace (1) is equipped with an experimental component (4), which includes: A support frame (41) is fixedly installed inside the experimental furnace (1). An experimental floor slab (42) is placed on the support frame (41). A wooden bracket (43) is placed on the experimental floor slab (42). A sandbag (44) is placed on the wooden bracket (43). An inclined plate (45) is fixedly installed inside the experimental furnace (1). A long plate (46) is fixedly installed on the inclined plate (45). A vibration motor (47) is fixedly installed on the top of the long plate (46). One end of a spring rod (48) is fixedly installed on the bottom of the long plate (46). A rubber pad (49) is fixedly installed on the other end of the spring rod (48). An empty slot (410), a discharge slot (411), and a limiting slot (412) are provided on the experimental furnace (1). A limiting block (413) is slidably installed on the experimental furnace (1), and a collection rack (414) is fixedly installed on the limiting block (413), and a collection box (415) is fixedly installed on the collection rack (414).

2. The composite floor slab fire test loading device according to claim 1, characterized in that: Multiple sets of sandbags (44), long plates (46), vibration motors (47), spring rods (48), rubber pads (49), and empty grooves (410) are respectively provided.

3. The composite floor slab fire test loading device according to claim 1, characterized in that: The inclined plate (45) is located below the support frame (41), the long plate (46) is located inside the slot (410), and the rubber pad (49) is attached to the ground.

4. The composite floor slab fire test loading device according to claim 1, characterized in that: The discharge trough (411) is directly opposite the collection rack (414), the collection rack (414) is located below the collection box (415), and the limiting block (413) slides inside the limiting groove (412).

5. The composite floor slab fire test loading device according to claim 1, characterized in that: The collection rack (414) is provided with an auxiliary component (5), which includes a mounting block (51). The mounting block (51) is fixedly installed at the bottom of the collection box (415). A ball (52) is hingedly installed on the mounting block (51). A hinge frame (53) is fixedly installed on the collection rack (414). One end of a spring-loaded spring (54) is fixedly installed inside the hinge frame (53). A thin rod (55) is fixedly installed on the other end of the spring-loaded spring (54). A cover plate (56) is fixedly installed on the thin rod (55). A baffle (57) is fixedly installed on the collection rack (414). A handle (58) is fixedly installed on the collection rack (414).

6. The composite floor slab fire test loading device according to claim 5, characterized in that: Multiple sets of the mounting block (51), sphere (52) and baffle (57) are provided, with the sphere (52) attached to the ground.

7. The composite floor slab fire test loading device according to claim 5, characterized in that: The baffle (57) is located below the cover plate (56), and the cover plate (56) is located above the discharge chute (411).

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