Building horizontal member fire endurance test pressurizing device

Abstract

The utility model discloses a building horizontal member fire endurance test pressurizing device which comprises a support, a plurality of hydraulic telescopic columns and an anti-tilting mechanism, the support is used for being connected with a test combustion furnace and comprises a pressurizing beam, and the pressurizing beam is horizontally arranged above the test combustion furnace; the hydraulic telescopic columns are vertically arranged under the pressurizing beam and fixedly connected with the pressurizing beam, all the hydraulic telescopic columns are linearly arranged at intervals in the length direction of the pressurizing beam, and the bottom ends of the hydraulic telescopic columns are used for pressing a horizontal component to be tested; the anti-tilting mechanism comprises a plurality of sleeves and a plurality of synchronous beams, the sleeves correspond to the hydraulic telescopic columns one to one and are coaxially arranged outside the corresponding hydraulic telescopic columns in a sleeving mode, every two adjacent sleeves are fixedly connected through the synchronous beams, and every two sleeves located on the two sides are fixedly connected with the support through the synchronous beams. The problem that a hydraulic telescopic column deviates or inclines can be solved.

Description

Technical Field

[0001] This utility model relates to the field of building component testing technology, specifically to a pressure device for testing the fire resistance limit of horizontal building components. Background Technology

[0002] With societal development, increasing material wealth and population density, the frequency of fires and the resulting damage are becoming increasingly severe. The flammability of building materials is a significant factor contributing to fire risk. Therefore, using materials with high fire resistance is a crucial strategy for reducing fire hazards, and fire performance testing must be conducted on building materials before they are put into use.

[0003] The fire resistance of building components is typically verified using a test combustion furnace. In fire tests, a simulated fire environment is established within the furnace according to the temperature and pressure conditions specified in the standards. The integrity, insulation, and other indicators of the building components are analyzed to assess their fire resistance. The test specimens are generally horizontal or vertical components. Horizontal components are often suspended in actual building use and have a relatively long horizontal length; therefore, their fire resistance under pressure is crucial to the safety of the entire building.

[0004] Existing pressurization mechanisms for pressurizing horizontal component samples in combustion furnaces generally consist of multiple vertically arranged hydraulic telescopic columns that extend downwards and compress the sample from top to bottom, thus simulating the pressure environment during actual use. However, existing pressurization mechanisms still have the following problems: Since the sample inevitably deforms under pressure and combustion, the continuously pressurized hydraulic telescopic columns will shift away from the sample, causing the bottom end of the hydraulic telescopic columns to bear the lateral component force, resulting in lateral shift and tilting of the hydraulic telescopic columns, which seriously affects their verticality and leads to test errors. Utility Model Content

[0005] The purpose of this invention is to provide a pressure testing device for the fire resistance limit of building horizontal components, which can solve the problem of displacement or tilting of hydraulic telescopic columns.

[0006] This utility model is achieved through the following technical solution:

[0007] A pressure device for testing the fire resistance limit of horizontal building components includes a support frame for connecting to a test combustion furnace. The support frame includes a pressure beam horizontally positioned above the test combustion furnace. Multiple hydraulic telescopic columns are vertically positioned directly below the pressure beam and fixedly connected to it. All hydraulic telescopic columns are linearly spaced along the length of the pressure beam, and their bottom ends are used to press down on the horizontal component to be tested. An anti-tilting mechanism includes multiple sleeves and multiple synchronous beams. Each sleeve corresponds to one of the hydraulic telescopic columns and is coaxially fitted onto the corresponding column. Adjacent sleeves are fixedly connected by multiple synchronous beams, and two sleeves located on opposite sides are fixedly connected to the support frame by multiple synchronous beams.

[0008] Optionally, the bottom outer wall of the hydraulic telescopic column extends outward to form a support edge, and multiple hydraulic elastic rods are vertically arranged at the top of the support edge. All the hydraulic elastic rods are evenly spaced in a ring, and the top of the hydraulic elastic rods are connected to the bottom of the sleeve.

[0009] Optionally, the sleeve is coaxially and detachably fitted with multiple retaining rings; the end of the synchronous beam is fixedly connected to the retaining rings.

[0010] Optionally, the outer wall of the sleeve has multiple limiting grooves in the vertical direction, the top of the limiting grooves is open and the bottom is closed; the inner wall of the retaining ring is provided with multiple limiting blocks in the radial direction, the limiting blocks correspond one-to-one with the limiting grooves and slide in fit.

[0011] Optionally, the inner diameter of the retaining ring is slightly larger than the outer diameter of the sleeve; the inner wall of the limiting block is covered with an elastic layer, which is squeezed and sandwiched between the limiting block and the bottom of the limiting groove.

[0012] Optionally, the vertical projection angle between any two synchronous beams connected by each sleeve is an acute angle.

[0013] Optionally, each sleeve is coaxially and equidistantly fitted with three clamping rings, and each clamping ring is connected to a synchronization beam on its opposite sides; the synchronization beams connected to the upper and lower clamping rings are tangent to the outer wall of the clamping rings; the synchronization beam connected to the middle clamping ring extends radially along the clamping ring.

[0014] Optionally, the vertical projection intersection of the three synchronous beams stacked vertically is pierced by a vertically set pin.

[0015] Optionally, the bottom end of the hydraulic telescopic column is provided with a pressure plate, and the top surface of the pressure plate is vertically connected to multiple limiting rods, all of which are arranged in a ring at uniform intervals; the top ends of the limiting rods pass through the support edge and the sleeve in sequence, and slide in cooperation with the support edge and the sleeve respectively.

[0016] Optionally, the support also includes a pair of columns, the bottom of which is connected to the top of the test combustion furnace, and the two ends of the pressure beam are respectively perpendicularly connected to the two columns; both the pressure beam and the columns are provided with several lightweight grooves.

[0017] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0018] This utility model provides a pressure device for testing the fire resistance limit of horizontal building components. It features a support frame including a pressure beam for structural support, and multiple hydraulic telescopic columns vertically positioned below the pressure beam to provide the basic pressure structure. An anti-tilting mechanism, comprising multiple sleeves and synchronous beams, is incorporated. The sleeves are coaxially fitted around the hydraulic telescopic columns, and adjacent sleeves are fixedly connected by the synchronous beams. The sleeves on both sides are fixedly connected to the support frame via the synchronous beams. The support frame and synchronous beams structurally fix the sleeves on both sides, and the synchronous beams structurally fix adjacent sleeves, thus fixing all sleeves as a single unit and integrating them with the support frame. This, in turn, fixes all hydraulic telescopic columns as a single unit. When one hydraulic telescopic column is subjected to force shift due to sample deformation and is about to tilt, its sleeve will be pulled by the sleeves on both sides via the synchronous beams, thus limiting its tilt and effectively solving the problem of hydraulic telescopic column shifting or tilting. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 A front view schematic diagram of the pressure device for fire resistance limit testing of building horizontal components provided in this embodiment of the utility model;

[0021] Figure 2 A top view of the sleeve and synchronous beam of the pressure device for fire resistance limit testing of building horizontal components provided in this embodiment of the utility model;

[0022] Figure 3 A partially enlarged top view of the limiting block of the pressure device for fire resistance limit testing of building horizontal components provided in this embodiment of the utility model;

[0023] Figure 4A schematic diagram of a hydraulic telescopic column for a fire resistance limit test pressurization device for building horizontal components provided in this embodiment of the utility model.

[0024] The attached diagram shows the markings and corresponding component names:

[0025] 40-Bracket; 41-Pressure beam; 42-Column; 43-Lightweight groove; 50-Sleeve; 501-Support edge; 502-Hydraulic elastic rod; 503-Limiting groove; 51-Synchronous beam; 52-Holding ring; 521-Limiting block; 522-Elastic layer; 53-Pin; 60-Hydraulic telescopic column; 61-Pressure plate; 62-Limiting rod. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0027] Example

[0028] Please refer to Figures 1 to 4 This embodiment provides a pressure device for testing the fire resistance limit of horizontal building components, including a support 40 for connecting to a test combustion furnace. The support 40 includes a pressure beam 41 horizontally positioned above the test combustion furnace. Secondly, it includes multiple hydraulic telescopic columns 60 vertically positioned directly below the pressure beam 41 and fixedly connected to it. All hydraulic telescopic columns 60 are linearly spaced along the length of the pressure beam 41, and their bottom ends are used to press down on the horizontal component to be tested. Thirdly, it includes an anti-tilting mechanism comprising multiple sleeves 50 and multiple synchronous beams 51. Each sleeve 50 corresponds to one of the hydraulic telescopic columns 60 and is coaxially fitted onto the corresponding hydraulic telescopic column 60. Adjacent sleeves 50 are fixedly connected by multiple synchronous beams 51, and two sleeves 50 located on opposite sides are fixedly connected to the support 40 by multiple synchronous beams 51.

[0029] The fire resistance limit test pressurization device for horizontal building components provided in this embodiment provides structural support by setting up a support 40, which includes a pressure beam 41, and by setting up multiple hydraulic telescopic columns 60 vertically below the pressure beam 41 to provide a basic pressurization structure. Based on this, an anti-tilting mechanism is provided, which includes multiple sleeves 50 and multiple synchronous beams 51. The sleeves 50 are coaxially fitted around the hydraulic telescopic columns 60, and adjacent sleeves 50 are fixedly connected by the multiple synchronous beams 51, so that the sleeves 50 on both sides are connected to the support 40 via the synchronous beams 51. The 0-type fixed connection utilizes the bracket 40 and the synchronous beam 51 to structurally fix the sleeves 50 on both sides. The synchronous beam 51 also structurally fixes the adjacent sleeves 50, thereby fixing all the sleeves 50 into one unit and the bracket 40 into one unit, thus fixing all the hydraulic telescopic columns 60 into one unit. When one of the hydraulic telescopic columns 60 is subjected to force shift due to sample deformation and is about to tilt, its sleeve 50 will be pulled by the sleeves 50 on both sides through the synchronous beam 51, thereby limiting its tilting and effectively solving the problem of hydraulic telescopic column 60 shifting or tilting.

[0030] To provide elastic support for the sleeve 50 during installation and prevent its bottom end from making hard contact with the hydraulic telescopic column 60, the outer wall of the bottom end of the hydraulic telescopic column 60 extends outward to form a support edge 501. Multiple hydraulic elastic rods 502 are vertically arranged at the top of the support edge 501. All the hydraulic elastic rods 502 are evenly spaced in a ring, and the top end of the hydraulic elastic rods 502 is connected to the bottom end of the sleeve 50.

[0031] To facilitate the fixed connection between the synchronous beam 51 and the sleeve 50, a plurality of retaining rings 52 are detachably and coaxially fitted on the outside of the sleeve 50; the end of the synchronous beam 51 is fixedly connected to the retaining rings 52.

[0032] During installation, the retaining ring 52 is fitted onto the sleeve 50 using a sleeve-fitting method, thereby fixing the synchronous beam 51, which is fixedly connected to the retaining ring 52, to the sleeve 50.

[0033] To prevent relative rotation between the retaining ring 52 and the sleeve 50, which could lead to uneven force distribution or incorrect force angle on the synchronous beam 51, the outer wall of the sleeve 50 has multiple limiting grooves 503 along the vertical direction. The top of each limiting groove 503 is open and the bottom is closed. The inner wall of the retaining ring 52 has multiple limiting blocks 521 protruding radially. Each limiting block 521 corresponds to and slides with the limiting groove 503.

[0034] To avoid hard contact between the retaining ring 52 and the sleeve 50, and to allow for a certain degree of elastic buffer, the inner diameter of the retaining ring 52 is slightly larger than the outer diameter of the sleeve 50; the inner wall of the limiting block 521 is covered with an elastic layer 522, and the elastic layer 522 is squeezed and clamped between the limiting block 521 and the bottom of the limiting groove 503.

[0035] In order to optimize the arrangement of the synchronous beams 51 and optimize the stress, the vertical projection angle between any two synchronous beams 51 connected by each sleeve 50 is an acute angle.

[0036] To further optimize the force distribution, each sleeve 50 is coaxially and equidistantly fitted with three retaining rings 52. Each retaining ring 52 is connected to a synchronous beam 51 on its opposite sides. The synchronous beams 51 connected to the two retaining rings 52 located at the top and bottom are tangent to the outer wall of the retaining ring 52. The synchronous beam 51 connected to the retaining ring 52 located in the middle extends radially along the retaining ring 52.

[0037] To ensure structural integrity, the vertical projection intersection of the three synchronous beams 51 stacked in the vertical direction is pierced by vertically set pins 53.

[0038] To further prevent the bottom end face of the hydraulic telescopic column 60 from tilting, a pressure plate 61 is provided at the bottom end of the hydraulic telescopic column 60. Multiple limiting rods 62 are vertically connected to the top surface of the pressure plate 61. All the limiting rods 62 are arranged in a ring at uniform intervals. The top end of the limiting rod 62 passes through the support edge 501 and the sleeve 50 in sequence, and slides with the support edge 501 and the sleeve 50 respectively.

[0039] To further explain the specific structure of the support 40, the support 40 also includes a pair of columns 42, the bottom end of which is connected to the top of the test combustion furnace, and the two ends of the pressure beam 41 are respectively perpendicularly connected to the two columns 42; both the pressure beam 41 and the columns 42 are provided with several lightweight grooves 43.

[0040] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A pressure testing device for the fire resistance limit of horizontal building components, characterized in that, include: A support (40) is used to connect to a test combustion furnace. The support (40) includes a pressure beam (41) which is horizontally positioned above the test combustion furnace. Multiple hydraulic telescopic columns (60) are vertically arranged directly below the pressure beam (41) and fixedly connected to the pressure beam (41). All the hydraulic telescopic columns (60) are arranged linearly at intervals along the length of the pressure beam (41). The bottom end of the hydraulic telescopic column (60) is used to press down on the horizontal component to be tested. The anti-tilt mechanism includes multiple sleeves (50) and multiple synchronous beams (51). Each sleeve (50) corresponds to a hydraulic telescopic column (60) and is coaxially fitted onto the corresponding hydraulic telescopic column (60). Two adjacent sleeves (50) are fixedly connected by multiple synchronous beams (51). Two sleeves (50) located on both sides are fixedly connected to the bracket (40) by multiple synchronous beams (51).

2. The pressure device for fire resistance limit testing of horizontal building components according to claim 1, characterized in that, The bottom outer wall of the hydraulic telescopic column (60) extends outward to form a support edge (501). Multiple hydraulic elastic rods (502) are vertically arranged at the top of the support edge (501). All the hydraulic elastic rods (502) are evenly spaced in a ring. The top of the hydraulic elastic rods (502) is connected to the bottom of the sleeve (50).

3. The pressure device for fire resistance limit testing of horizontal building components according to claim 2, characterized in that, The sleeve (50) is coaxially and detachably fitted with multiple retaining rings (52); The end of the synchronous beam (51) is fixedly connected to the retaining ring (52).

4. The pressure device for fire resistance limit testing of horizontal building components according to claim 3, characterized in that, The outer wall of the sleeve (50) has multiple limiting grooves (503) in the vertical direction, the top of the limiting grooves (503) is open and the bottom is closed; The inner wall of the retaining ring (52) is provided with a plurality of limiting blocks (521) protruding radially, and the limiting blocks (521) correspond one-to-one with the limiting grooves (503) and slide in cooperation.

5. The pressure device for fire resistance limit testing of horizontal building components according to claim 4, characterized in that, The inner diameter of the retaining ring (52) is slightly larger than the outer diameter of the sleeve (50); The inner wall of the limiting block (521) is covered with an elastic layer (522), which is squeezed and sandwiched between the limiting block (521) and the bottom of the limiting groove (503).

6. The pressure device for fire resistance limit testing of horizontal building components according to claim 5, characterized in that, The vertical projection angle between any two synchronous beams (51) connected by each sleeve (50) is an acute angle.

7. The pressure device for fire resistance limit testing of horizontal building components according to claim 6, characterized in that, Each sleeve (50) is coaxially and equidistantly fitted with three retaining rings (52), and each retaining ring (52) is connected to a synchronous beam (51) on its opposite sides. The synchronous beam (51) connected by the two upper and lower retaining rings (52) is tangent to the outer wall of the retaining ring (52); The synchronous beam (51) connected to the middle retaining ring (52) extends radially along the retaining ring (52).

8. The pressure device for fire resistance limit testing of horizontal building components according to claim 7, characterized in that, The vertical projections of the three synchronous beams (51) stacked vertically are intersected by vertically set pins (53).

9. The pressure device for fire resistance limit testing of horizontal building components according to claim 2, characterized in that, The bottom end of the hydraulic telescopic column (60) is provided with a pressure plate (61), and the top surface of the pressure plate (61) is vertically connected with multiple limiting rods (62), and all the limiting rods (62) are arranged in a ring at uniform intervals. The top end of the limiting rod (62) passes through the support edge (501) and the sleeve (50) in sequence, and slides with the support edge (501) and the sleeve (50) respectively.

10. The pressure device for fire resistance limit testing of horizontal building components according to claim 1, characterized in that, The support (40) also includes a pair of columns (42), the bottom end of which is connected to the top of the test combustion furnace, and the two ends of the pressure beam (41) are respectively perpendicularly connected to the two columns (42); Both the pressure beam (41) and the column (42) have several lightweight grooves (43).

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