Lower box body of wind uplift resistance testing machine

Abstract

The invention discloses a wind uplift resistance testing machine lower box body, which comprises an external box body and a mounting frame body slidably arranged in the external box body, and is characterized in that the external box body comprises a main body structure and a sliding track, and the sliding track is fixed in the long side wall of the main body structure through welding; the installation frame body comprises side wall supports, a middle support and a connecting rod, the side wall supports are fixed to the two ends of the connecting rod in a welded mode, and the middle support is arranged on the connecting rod in a sliding mode. According to the box body provided by the invention, the number and the positions of the test purlins can be freely adjusted, and the arrangement of the purlins in an actual structure can be completely restored, so that a test result can more intuitively reflect the actual bearing capacity of a prototype structure, and the flexibility and the effectiveness of a wind uplift resistance test are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind uplift test in civil engineering, and particularly relates to a lower box body for wind uplift test. Background Art

[0002] The metal enclosure system is an important part of the building enclosure system. Due to its advantages such as light weight, high strength, and convenient installation, it is widely used in large public buildings such as airports and railway stations, as well as industrial factories. However, under the action of hurricanes, the metal enclosure system may have excessive deformation or even break and fall off. Therefore, it is very necessary to study the wind uplift resistance performance of the metal enclosure system. At present, the most accurate way to obtain the wind uplift resistance performance of the metal enclosure system is to conduct a wind uplift test. Among them, the vacuum negative pressure method most restores the actual stress situation of the enclosure structure and is also the most commonly used wind uplift test method at present.

[0003] The wind uplift test machine using the vacuum negative pressure method usually includes upper and lower boxes. The upper box is used to provide negative pressure to the enclosure panel to simulate the pressure change generated when the air flow quickly passes through the enclosure panel. The lower box is used to install purlins and enclosure panels. However, the installation position and installation span of the purlins in the lower box of the existing test machines cannot be adjusted and can only be installed according to the preset positions, and cannot be changed according to requirements, lacking a means to simulate the actual purlin layout. Therefore, the applicability of the lower box of the existing wind uplift test machines is low, and it cannot effectively restore the purlin layout in the actual structure, and the wind uplift test results cannot directly reflect the actual bearing capacity of the prototype structure. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the present invention provides a lower box body for wind uplift test, which solves the technical problem that the applicability of the lower box body of the traditional wind uplift test machine is low and it cannot effectively restore the purlin layout in the actual structure.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide a lower box body for a wind uplift test machine, including an external box body and a mounting frame slidably arranged inside the external box body. The external box body includes a main structure and sliding tracks, and the sliding tracks are fixed inside the long side side walls of the main structure by welding; the mounting frame includes side wall brackets, intermediate brackets and connecting rods, and the side wall brackets are fixed at both ends of the connecting rods by welding, and the intermediate brackets are slidably arranged on the connecting rods.

[0006] Further, the main structure of the external box body is a cuboid structure with one end not closed, and the other components of the present invention are all arranged inside the main structure;

[0007] Further, the sliding track of the outer box body is of a long strip structure, and the length of the sliding track is the same as the length of the long side side wall of the main structure of the outer box body; the sliding track is arranged inside the long side side wall of the main structure of the outer box body, and two sliding tracks are arranged on each side wall.

[0008] Further, the side wall brackets of the mounting frame body are provided with a plurality of bolt holes for fixing the purlins used in the test; two card slots are arranged on both sides of the side wall brackets, and the side wall brackets are slidably arranged on the sliding track of the outer box body through the card slots; the card slots are provided with fastening bolts.

[0009] Further, the connecting rod of the mounting frame body is arranged in the middle of the two side wall brackets and is connected to the side wall brackets by welding at both ends.

[0010] Further, the middle bracket of the mounting frame body is provided with a plurality of bolt holes for fixing the purlins used in the test; the middle bracket is provided with a bottom bracket with a card slot, and the middle bracket is slidably arranged on the connecting rod through the card slot; the card slot is provided with a fastening bolt.

[0011] Further, the number of the mounting frame bodies can be increased or decreased arbitrarily according to actual needs; the number of the middle brackets of the mounting frame bodies can be increased or decreased arbitrarily according to actual needs.

[0012] The beneficial technical effects of the present invention are as follows:

[0013] In the present invention, a slidable mounting frame body is arranged inside the box body, and a slidable middle bracket is arranged on the mounting frame body. The tester can adjust the number and position of the mounting frame body and the middle bracket according to the actual span and spacing of the purlins, so as to ensure that the purlin layout of the test model completely restores the real scene, and the test results can more intuitively reflect the actual bearing capacity of the prototype structure, greatly improving the flexibility and effectiveness of the wind uplift test. Description of the Drawings

[0014] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0015] Figure 1 Shows a schematic diagram of the lower box body of a wind uplift testing machine provided by the present invention;

[0016] Figure 2 Shows a sectional view of the lower box body of a wind uplift testing machine provided by the present invention;

[0017] Figure 3 Shows a schematic diagram of the lower box body of a wind uplift testing machine provided by the present invention after installing purlins. Detailed Embodiments

[0018] The following will further describe in detail the specific embodiments of the present invention in conjunction with the accompanying drawings.

[0019] As Figure 1 - Figure 2 shown, it is a lower box body of a wind uplift test machine provided by the present invention, including an external box body 1 and a mounting frame body 2 slidably arranged inside the external box body. The external box body 1 includes a main structure 11 and sliding rails 12, and the sliding rails 12 are fixed inside the long-side side wall of the main structure 11 by welding; the mounting frame body 2 includes side wall brackets 21, intermediate brackets 22 and connecting rods 23, the side wall brackets 21 are fixed at both ends of the connecting rods 23 by welding, and the intermediate brackets 22 are slidably arranged on the connecting rods 23.

[0020] The main structure 11 of the external box body 1 is a cuboid structure with one end not closed, and the other components of the present invention are all arranged inside the main structure 11;

[0021] The sliding rails 12 are strip-shaped structures, and the length of the sliding rails 12 is the same as the length of the long-side side wall of the main structure 11 of the external box body 1; the sliding rails 12 are arranged inside the long-side side wall of the main structure 11, and two sliding rails 12 are arranged on each side wall.

[0022] The side wall brackets 21 of the mounting frame body 2 are provided with a plurality of bolt holes 211 for fixing purlins 3 used in the test; two card slots 212 are arranged on both sides of the side wall brackets 21, and the side wall brackets 21 are slidably arranged on the sliding rails 12 of the external box body 1 through the card slots 212; fastening bolts are provided in the card slots 212.

[0023] The intermediate brackets 22 of the mounting frame body 2 are provided with a plurality of bolt holes 221 for fixing purlins 3 used in the test; the intermediate brackets 22 are provided with bottom brackets 222 with card slots 223, and the intermediate brackets 22 are slidably arranged on the connecting rods 23 through the card slots 223, and fastening bolts are provided in the card slots 223.

[0024] The connecting rods 23 of the mounting frame body 2 are arranged in the middle of the two side wall brackets 21 and are connected to the side wall brackets 21 by welding at both ends.

[0025] The number of the mounting frame body 2 and the intermediate brackets 22 can be increased or decreased arbitrarily according to actual needs.

[0026] The following will specifically describe the specific implementation method of the present invention in conjunction with Figure 1 - Figure 3 specifically illustrate the specific implementation method of the present invention.

[0027] According to the general wind uplift test requirements, the size of the external box body 1 is 7.5m × 3.76m; the purlin spacing in the prototype structure of the metal enclosure system that needs to conduct the wind uplift test is 1.2m, and the purlin span is 2m. Seven sets of mounting frames 2 are taken, and each mounting frame is equipped with one middle bracket 22. Place the mounting frame 2 into the main structure 11 of the external box body 1, and snap the sliding track of the external box body 1 into the card slot 212 of the side wall bracket 21. Move the mounting frame 2 until the distance between each mounting frame 2 is the same as the purlin spacing in the prototype structure, that is, 1.2m, and tighten the fastening bolts on the card slot 212 of the side wall bracket 21 to fix the positions of each mounting frame 2. Move the middle brackets 22 of each mounting frame 2 so that the distance from the middle bracket 22 to the side wall bracket 21 on one side of the mounting frame 2 is the same as the purlin span in the prototype structure, that is, 2m, and tighten the fastening bolts on the card slot 223 of the middle bracket 22 to fix the positions of each middle bracket. On this basis, install the test purlin 3 to complete the preparation work for the wind uplift test, as Figure 3 shown.

[0028] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art, according to the technical solutions and inventive concepts disclosed by the present invention, make equivalent replacements or changes, and the obtained technical solutions should all be covered within the protection scope of the present invention.

Claims

1. An under-box of a wind uplift resistance testing machine, characterized in that: It includes an external box body (1) and a mounting frame body (2) slidably arranged inside the external box body. The external box body (1) includes a main structure (11) and sliding rails (12), and the sliding rails (12) are fixed inside the long-side side walls of the main structure (11) by welding; the mounting frame body (2) includes side wall brackets (21), intermediate brackets (22) and connecting rods (23), the side wall brackets (21) are fixed at both ends of the connecting rods (23) by welding, and the intermediate brackets (22) are slidably arranged on the connecting rods (23).

2. The under-box of a wind uplift resistance testing machine according to claim 1, characterized in that: The sliding rails (12) are of a long-strip structure, and the length is the same as the length of the long-side side walls of the main structure (11); the sliding rails (12) are arranged inside the long-side side walls of the main structure (11), and two sliding rails (12) are arranged on each side wall.

3. The under-box of a wind uplift resistance testing machine according to claim 1, characterized in that: The side wall brackets (21) of the mounting frame body (2) are provided with a plurality of bolt holes (211); two clamping grooves (212) are provided on both sides of the side wall brackets (21), and the side wall brackets (21) are slidably arranged on the sliding rails (12) of the external box body (1) through the clamping grooves (212).

4. The under-box of a wind uplift resistance testing machine according to claim 1, characterized in that: The intermediate brackets (22) of the mounting frame body (2) are provided with a plurality of bolt holes (221); the intermediate brackets (22) are provided with bottom brackets (222) with clamping grooves (223), and the intermediate brackets (22) are slidably arranged on the connecting rods (23) through the clamping grooves (223).

5. The under-box of a wind uplift resistance testing machine according to claim 1, characterized in that: The connecting rods (23) of the mounting frame body (2) are arranged in the middle of two side wall brackets (21) and are connected to the side wall brackets (21) by welding at both ends.

6. The under-box of a wind uplift resistance testing machine according to claim 1, characterized in that: Fastening bolts are provided in the clamping grooves (212) of the side wall brackets (21) and the clamping grooves (223) of the intermediate brackets (22).

7. The under-box of a wind uplift resistance testing machine according to claim 1, characterized in that: The number of the mounting frame body (2) and the intermediate brackets (22) can be increased or decreased arbitrarily according to actual needs.

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