Bending resistance and bending resistance testing machine for autoclaved aerated concrete slab

Abstract

The invention provides a bending resistance and bending resistance testing machine for autoclaved aerated concrete slabs, and relates to the technical field of building material detection equipment.The bending resistance and bending resistance testing machine comprises an upper tool and a lower tool, lifting stand columns are symmetrically arranged on the two sides of the middle of the upper tool and the two sides of the middle of the lower tool, a lifting cross beam is arranged between the lifting stand columns, and the lifting cross beam is connected with the upper tool through a connecting assembly; a lower sliding rail and a lower fulcrum are arranged on the upper end face of the lower tool, a grating ruler is arranged in the middle of the lower tool, an upper sliding rail and an upper fulcrum are arranged on the lower end face of the upper tool, and a dial indicator is arranged on one side of the lower fulcrum. The device can effectively and accurately measure the displacement change of the concrete slab in the stress process, is high in precision and stability, has the functional effects of error compensation and impact and vibration reduction, can effectively guarantee the accuracy of a test result, and is high in practicability, good in effect and suitable for large-scale popularization.

Description

Technical Field

[0001] The invention relates to the technical field of building material testing equipment, in particular to a bending and flexural testing machine for autoclaved aerated concrete panels. Background Art

[0002] Autoclaved aerated concrete board is a new type of lightweight porous building material made of siliceous materials (such as fly ash, sand, etc.) and calcium materials (such as cement, lime, etc.) as the main raw materials, adding gas-generating agents, and then mixing, pouring, pre-curing, cutting, and curing under high temperature and high pressure. It has the advantages of light weight, good thermal insulation performance, excellent fire resistance, good sound insulation effect, strong processability, etc., and is widely used in building interior and exterior walls, roof panels, floor slabs and other parts.

[0003] For large concrete slab samples, their bending strength and flexural strength are two very important indicators in the field of performance testing. Both are not only important parameters for measuring cement strength, but also key indicators for evaluating cement performance. Among them, bending and flexural performance not only affects the quality and durability of concrete materials, but also directly affects the safety and stability of engineering structures. Therefore, through rigorous testing processes and accurate data analysis, the bending and flexural performance of materials is tested and evaluated, so that the performance of concrete slabs can be better understood, providing important references for its engineering practice and material selection. Summary of the invention

[0004] In view of the problems raised in the background technology, the present invention provides a bending and flexural testing machine for autoclaved aerated concrete panels.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A bending and flexure testing machine for autoclaved aerated concrete panels, characterized in that it comprises an upper fixture and a lower fixture, the upper fixture and the lower fixture are in the same vertical plane and are arranged horizontally and in parallel, lifting columns are symmetrically arranged on both sides of the middle of the upper fixture and the lower fixture, a lifting beam is arranged between the lifting columns, and the lifting beam is controlled to move up and down;

[0007] The lifting beam is connected to the upper tooling through a connecting assembly to control the lifting of the upper tooling. A lower slide rail and a lower fulcrum are arranged on the upper end surface of the lower tooling, and a grating ruler is arranged in the middle. The lower fulcrum is slidably arranged on the lower tooling through the lower slide rail. An upper slide rail and an upper fulcrum are arranged on the lower end surface of the upper tooling, and the upper fulcrum is slidably arranged on the upper tooling through the upper slide rail.

[0008] A dial indicator is arranged on one side of the lower fulcrum, and the dial indicator is connected to the lower fulcrum through a lifting fixture support and is suspended above the lower fulcrum.

[0009] The above-mentioned bending and flexure testing machine for autoclaved aerated concrete panels is characterized in that the number of the upper fulcrums is two, which are respectively arranged at the two ends of the upper tooling, and the number of the lower fulcrums is two, which are respectively arranged at the two ends of the lower tooling.

[0010] The above-mentioned autoclaved aerated concrete slab bending and flexural testing machine is characterized in that scales are provided on the sides of the upper tooling and the lower tooling, and pointers are provided on the sides of the upper fulcrum and the lower fulcrum, and the scales and pointers cooperate with each other to indicate the position information of the upper fulcrum and the lower fulcrum.

[0011] The above-mentioned autoclaved aerated concrete slab bending and flexure testing machine is characterized in that the connecting assembly is composed of a connecting seat, a connecting plate and a fisheye bearing, the connecting seat is fixedly arranged in the middle of the lifting beam, the connecting plate is fixedly installed in the middle of the upper end surface of the upper tooling, and is provided with a pin hole, the upper end of the fisheye bearing is threadedly fastened to the connecting seat, and the lower end thereof is detachably connected to the connecting plate through a column pin and a pin hole.

[0012] The above-mentioned bending and flexure testing machine for autoclaved aerated concrete panels is characterized in that baffles for locating the positions of the upper fulcrum and the lower fulcrum are provided at both ends of the upper slide rail and the lower slide rail.

[0013] The above-mentioned autoclaved aerated concrete slab bending and flexure testing machine is characterized in that the lower tooling is of three-section type, composed of three sections of lower tooling units, adjacent lower tooling units are connected by screws and positioning pins, and the lower sliding rails thereon are connected to each other.

[0014] The above-mentioned bending and flexural testing machine for autoclaved aerated concrete panels is characterized in that the construction and assembly method of the bending and flexural testing machine is as follows:

[0015] (1) Foundation construction

[0016] (1-1) Excavate the foundation according to the specifications of the bending and flexure testing machine and reserve the foundation holes;

[0017] (1-2) Place the anchors into the reserved anchor holes;

[0018] (1-3) Place the lifting column and base tooling to the corresponding position and place leveling pads at the bottom;

[0019] (1-4) Pass the foot through the bottom of the lifting column and the base tooling and screw on the nut;

[0020] (1-5) Adjust the position of the lifting column and the base tooling and level them to meet the layout requirements;

[0021] (1-6) Pour mortar concrete into the anchor holes. During pouring, vibrate while pouring to ensure that the concrete is completely filled in the anchor holes and no bubbles are present;

[0022] (1-7) After the concrete is filled to the level of the horizontal surface, smooth the upper surface and wait for it to solidify for 7-10 days;

[0023] (2) Equipment installation

[0024] (2-1) Install the three-section lower fixture on the base fixture, and use the coaxial rod and positioning plate to adjust the centering of the lower fixture and the lifting beam on the lifting column. After the centering adjustment is completed, fix the lower fixture to the base fixture;

[0025] (2-2) Remove the coaxial rod and the positioning plate, install the connecting seat and the fisheye bearing in the middle of the lifting beam, install the connecting plate in the middle of the upper tooling, then lift the upper tooling with the lifting equipment, and connect the fisheye bearing and the connecting plate with the pins;

[0026] (3) Sample test

[0027] (3-1) Select a sample, determine the positions of the upper and lower fulcrums according to the sample specifications, and adjust the positions of the upper and lower fulcrums;

[0028] (3-2) Install the grating ruler, then place the sample on the lower support of the lower fixture, install the dial indicator, and control the upper fixture to descend until the upper support is close to or slightly in contact with the upper surface of the sample;

[0029] (3-3) Start the test, and the upper tooling continues to descend and pressurize to collect test data.

[0030] The above-mentioned autoclaved aerated concrete slab bending and flexure testing machine is characterized in that, in step (2-1), the lower tooling unit located in the middle of the lower tooling is preferentially placed and aligned with the lifting beam. After the alignment is completed, the middle lower tooling unit is fixed to the base tooling. Subsequently, the lower tooling units at both ends are placed and leveled so that the upper end surfaces of the lower tooling units at both ends are flush with the upper end surface of the middle lower tooling unit. Then, the adjacent lower tooling units are connected by screws and locating pins, and finally fixed to the base tooling.

[0031] The above-mentioned autoclaved aerated concrete slab bending and flexural testing machine is characterized in that, in step (3-1), when adjusting the positions of the upper fulcrum and the lower fulcrum, the positions of the upper fulcrum and the lower fulcrum are adjusted by observing the ruler and the pointer, and finally the upper fulcrum and the lower fulcrum are positioned at appropriate positions by the baffle.

[0032] Technical effects and advantages of the present invention:

[0033] The present invention proposes a bending and flexure testing machine for autoclaved aerated concrete panels, which relates to the technical field of building material testing equipment, and comprises an upper tooling and a lower tooling, wherein lifting columns are symmetrically arranged on both sides of the middle of the upper tooling and the lower tooling, a lifting beam is arranged between the lifting columns, and the lifting beam is connected to the upper tooling through a connecting component, a lower slide rail and a lower fulcrum are arranged on the upper end surface of the lower tooling, and a grating ruler is arranged in the middle, an upper slide rail and an upper fulcrum are arranged on the lower end surface of the upper tooling, and a dial indicator is arranged on one side of the lower fulcrum. The present invention has reasonable design and simple principle, is used for bending and flexure testing of concrete panels, can effectively and accurately measure the displacement change of concrete panels during the force-bearing process, has high precision and stability, and has the functional effects of error compensation and reduction of impact and vibration, can effectively ensure the accuracy of the test results, has high practicality and good effect, and is suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the present invention.

[0035] Figure 2 for Figure 1 Enlarged schematic diagram of area B in the middle.

[0036] Figure 3 for Figure 1 A magnified schematic diagram of area A in the middle.

[0037] Figure 4 It is a schematic diagram of the construction and assembly of the present invention.

[0038] Figure 5 for Figure 4 Enlarged schematic diagram of area D in the middle.

[0039] Figure 6 It is a schematic diagram of the foundation of the present invention.

[0040] Among them, the figure markings are as follows: 1. upper tooling; 2. lower tooling; 3. lifting column; 4. lifting beam; 5. lower slide rail; 6. lower fulcrum; 7. grating scale; 8. upper slide rail; 9. upper fulcrum; 10. dial indicator; 11. ruler; 12. pointer; 13. connecting seat; 14. connecting plate; 15. fisheye bearing; 16. pin; 17. baffle; 18. lower tooling unit; 19. screw; 20. positioning pin; 21. anchor; 22. anchor hole; 23. base tooling; 24. leveling shim; 25. coaxial rod; 26. positioning plate; 27. specimen. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Example 1

[0043] As shown in the figure, the present embodiment discloses a bending and flexural testing machine for autoclaved aerated concrete panels, which is used for bending and flexural testing of concrete panels. Specifically, the machine comprises an upper fixture 1 and a lower fixture 2, wherein the upper fixture 1 is used for applying pressure, and the lower fixture 2 is used for passively applying pressure. The upper fixture 1 and the lower fixture 2 are in the same vertical plane and are arranged horizontally and in parallel. Lifting columns 3 are symmetrically arranged on both sides of the middle of the upper fixture 1 and the lower fixture 2, and a lifting beam 4 is arranged between the lifting columns 3, and the lifting beam 4 is controlled to move up and down;

[0044] The lifting beam 4 is connected to the upper tooling 1 through a connecting component to control the lifting of the upper tooling 1. A lower sliding rail 5 and a lower fulcrum 6 are arranged on the upper end surface of the lower tooling 2, and a grating ruler 7 is arranged in the middle. The lower fulcrum 6 is slidably arranged on the lower tooling 2 through the lower sliding rail 5. An upper sliding rail 8 and an upper fulcrum 9 are arranged on the lower end surface of the upper tooling 1. The upper fulcrum 9 is slidably arranged on the upper tooling 1 through the upper sliding rail 8. The upper tooling 1 is controlled to lift and lower through the lifting beam 4, thereby controlling whether to apply pressure and the intensity of the pressure. The upper fulcrum 9 and the lower fulcrum 6 are horizontally moved through the slide rail, thereby adjusting the pressure point. The grating ruler 7 is used to accurately measure the displacement change of the concrete slab during the force-bearing process and record relevant test information. It has high precision and stability, and can effectively ensure the accuracy of the test results.

[0045] In addition, a dial indicator 10 is provided on one side of the lower fulcrum 6. The dial indicator 10 is connected to the lower fulcrum 6 through a lifting fixture support and is suspended above the lower fulcrum 6 to intuitively measure the bending deformation of the concrete slab during the force-bearing process, helping the staff to understand the mechanical properties of the concrete slab. It can also be used to calibrate the accuracy of the testing machine, ensure the reliability of the test data, and improve the credibility of the test data.

[0046] In addition, there are two upper fulcrums 9, which are arranged at both ends of the upper tooling 1, and there are two lower fulcrums 6, which are arranged at both ends of the lower tooling 2. At the same time, in this embodiment, scales 11 are provided on the sides of the upper tooling 1 and the lower tooling 2, and pointers 12 are provided on the sides of the upper fulcrum 9 and the lower fulcrum 6. The scales 11 and the pointers 12 cooperate with each other to indicate the position information of the upper fulcrum 9 and the lower fulcrum 6. Their function is to facilitate adaptive adjustment of the positions of the upper fulcrum 9 and the lower fulcrum 6 according to the specifications and test requirements of the sample 27.

[0047] In addition, the connecting assembly in the present embodiment is composed of a connecting seat 13, a connecting plate 14 and a fisheye bearing 15. The connecting seat 13 is fixedly arranged in the middle of the lifting beam 4, the connecting plate 14 is fixedly installed in the middle of the upper end surface of the upper tooling 1, and is provided with a pin hole. The upper end of the fisheye bearing 15 is threadedly fastened to the connecting seat 13, and its lower end is detachably connected to the connecting plate 14 through a column pin 16 and a pin hole. Through this technical solution, the error compensation of the upper tooling 1 can be effectively performed, especially when pressure is applied, the fisheye bearing can be adjusted by its own rotation and swing to ensure that the upper tooling 1 can accurately apply force to the concrete slab. In addition, it can also effectively reduce impact and vibration, especially when the lifting beam 4 is started or stopped, the impact and vibration may be generated, and the accuracy of the test results can be effectively guaranteed.

[0048] In this embodiment, both ends of the upper slide rail 8 and the lower slide rail 5 are provided with baffles 17 for locating the positions of the upper fulcrum 9 and the lower fulcrum 6. At the same time, based on the size specifications of the conventional sample 27, in this embodiment, the lower tooling 2 is a three-section type, composed of three sections of lower tooling units 18. Adjacent lower tooling units 18 are connected by screws 19 and positioning pins 20, and the lower slide rails 5 thereon are connected to each other.

[0049] Example 2

[0050] This embodiment discloses a bending and flexure testing machine for autoclaved aerated concrete panels, which is characterized in that the construction and assembly method of the bending and flexure testing machine is as follows:

[0051] (1) Foundation construction

[0052] (1-1) Excavate the foundation according to the specifications of the bending and flexure testing machine, and reserve the anchor holes 22;

[0053] (1-2) Place the anchor 21 into the reserved anchor hole 22;

[0054] (1-3) Place the lifting column 3 and the base tooling 23 to the corresponding positions, and place the leveling shims 24 at the bottom;

[0055] (1-4) Pass the foot 21 through the bottom of the lifting column 3 and the base tooling 23 and screw on the nut;

[0056] (1-5) Adjust the position of the lifting column 3 and the base tooling 23 and level them to meet the layout requirements;

[0057] (1-6) Pour mortar concrete into the anchor hole 22. During the pouring, vibrate while pouring to ensure that the concrete is completely filled in the anchor hole 22 without any bubbles.

[0058] (1-7) After the concrete is filled to the level of the horizontal surface, smooth the upper surface and wait for it to solidify for 7-10 days;

[0059] (2) Equipment installation

[0060] (2-1) Install the three-section lower fixture 2 on the base fixture 23, and use the coaxial rod 25 and the positioning plate 26 to adjust the centering of the lower fixture 2 and the lifting beam 4 on the lifting column 3. After the centering adjustment is completed, fix the lower fixture 2 to the base fixture 23;

[0061] (2-2) Remove the coaxial rod 25 and the positioning plate 26, install the connecting seat 13 and the fisheye bearing 15 in the middle of the lifting beam 4, and install the connecting plate 14 in the middle of the upper tooling 1. Then, lift the upper tooling 1 by the lifting equipment, and connect the fisheye bearing 15 and the connecting plate 14 together by the pin 16;

[0062] (3) Sample test

[0063] (3-1) Select a sample, determine the positions of the upper fulcrum 9 and the lower fulcrum 6 according to the specifications of the sample 27, and adjust the positions of the upper fulcrum 9 and the lower fulcrum 6;

[0064] (3-2) Install the grating ruler 7, then place the sample 27 on the lower support 6 of the lower fixture 2, and install the dial indicator 10, while controlling the upper fixture 1 to descend until the upper support 9 is close to or slightly in contact with the upper surface of the sample 27;

[0065] (3-3) Start the test, and the upper tooling 1 is continuously lowered and pressurized to collect test data.

[0066] At the same time, in step (2-1), the lower fixture unit 18 located in the middle of the lower fixture 2 is preferentially placed, and is aligned with the lifting beam 4 to ensure that the middle of the lower fixture 2 meets the test requirements. After the alignment is completed, the middle lower fixture unit 18 is fixed to the base fixture 23 to determine the installation position. Then, the lower fixture units 18 at both ends are placed and leveled so that the upper end surfaces of the lower fixture units 18 at both ends are flush with the upper end surface of the lower fixture unit 18 in the middle, and the adjacent lower fixture units 18 are connected by screws 19 and positioning pins 20, and finally fixed to the base fixture 23 to complete the accurate installation of the entire lower fixture 2;

[0067] In addition, in step (3-1), when adjusting the positions of the upper fulcrum 9 and the lower fulcrum 6, the positions of the upper fulcrum 9 and the lower fulcrum 6 are adjusted by observing the scale 11 and the pointer 12, and finally the upper fulcrum 9 and the lower fulcrum 6 are positioned at appropriate positions through the baffle 17.

[0068] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can all be customized according to the description and the drawings.

[0070] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bending and flexural testing machine for autoclaved aerated concrete panels, characterized in that: The utility model comprises an upper tooling (1) and a lower tooling (2), wherein the upper tooling (1) and the lower tooling (2) are located in the same vertical plane and are arranged horizontally and in parallel, and lifting columns (3) are symmetrically arranged on both sides of the middle of the upper tooling (1) and the lower tooling (2), and a lifting beam (4) is arranged between the lifting columns (3), and the lifting beam (4) is controlled to be lifted up and down; The lifting beam (4) is connected to the upper tooling (1) through a connecting assembly to control the lifting of the upper tooling (1); a lower sliding rail (5) and a lower fulcrum (6) are arranged on the upper end surface of the lower tooling (2), and a grating ruler (7) is arranged in the middle; the lower fulcrum (6) is slidably arranged on the lower tooling (2) through the lower sliding rail (5); an upper sliding rail (8) and an upper fulcrum (9) are arranged on the lower end surface of the upper tooling (1); and the upper fulcrum (9) is slidably arranged on the upper tooling (1) through the upper sliding rail (8); A dial indicator (10) is arranged on one side of the lower fulcrum (6); the dial indicator (10) is connected to the lower fulcrum (6) via a lifting fixture support and is suspended above the lower fulcrum (6).

2. The bending and flexural testing machine for autoclaved aerated concrete panels according to claim 1, characterized in that: The number of the upper supporting points (9) is two, which are respectively arranged at the two ends of the upper tooling (1); the number of the lower supporting points (6) is two, which are respectively arranged at the two ends of the lower tooling (2).

3. The bending and flexural testing machine for autoclaved aerated concrete panels according to claim 2, characterized in that: The upper tooling (1) and the lower tooling (2) are both provided with scales (11) on their sides, and the upper fulcrum (9) and the lower fulcrum (6) are both provided with pointers (12) on their sides. The scales (11) and the pointers (12) cooperate with each other to indicate the location information of the upper fulcrum (9) and the lower fulcrum (6).

4. The bending and flexural testing machine for autoclaved aerated concrete panels according to claim 3, characterized in that: The connection assembly is composed of a connection seat (13), a connection plate (14) and a fisheye bearing (15); the connection seat (13) is fixedly arranged in the middle of the lifting beam (4); the connection plate (14) is fixedly installed in the middle of the upper end surface of the upper tooling (1) and is provided with a pin hole; the upper end of the fisheye bearing (15) is threadedly connected to the connection seat (13), and the lower end thereof is detachably connected to the connection plate (14) through the cooperation of a column pin (16) and a pin hole.

5. The bending and flexural testing machine for autoclaved aerated concrete panels according to claim 4, characterized in that: Both ends of the upper slide rail (8) and the lower slide rail (5) are provided with baffles (17) for locating the positions of the upper support point (9) and the lower support point (6).

6. The bending and flexural testing machine for autoclaved aerated concrete panels according to claim 5, characterized in that: The lower tooling (2) is of three-section type, and is composed of three sections of lower tooling units (18). Adjacent lower tooling units (18) are connected by screws (19) and positioning pins (20), and the lower sliding rails (5) thereon are connected to each other.

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