Multi-site breaking strength testing device for rock wool board

Abstract

The utility model discloses a multi-site breaking strength testing device of a rock wool board, which is characterized in that support columns are fixed on two sides of a test board, and a top plate is fixedly connected to the top ends of the support columns. A lead screw is arranged in the middle of each of the two sides of the test board, the lower end of each lead screw is rotationally connected with the test board, and the upper end of each lead screw is connected with a driving motor fixed on the top plate. The plurality of bearing tables are uniformly fixed on the upper surface of the test board at intervals, the pressing plate is horizontally arranged above the bearing tables, and the two ends of the pressing plate are respectively in threaded connection with the lead screws on the two sides of the test board. The connecting plate is arranged above the pressing plate, the two ends of the connecting plate are in sliding connection with the lead screws on the two sides of the testing table respectively, the pressing heads are fixed to the connecting plate, and the pressing plate is provided with an opening for the pressing head above the pressing plate to pass through. The testing device disclosed by the utility model can be used for testing the breaking strength of a plurality of parts of the rock wool board to be tested at the same time, so that the breaking resistance of the rock wool board can be reflected more truly and fully.

Description

Technical Field

[0001] The utility model relates to the field of rock wool board testing equipment, in particular to a multi-point flexural strength testing device for rock wool boards. Background Art

[0002] Rock wool board, also known as rock wool insulation decorative board, is made from basalt as the main raw material. After being melted at high temperature to form fibers, a binder is added and the board is cured to form an inorganic fiber board. Due to its low thermal conductivity, rock wool board can effectively prevent heat transfer and reduce building energy consumption. In addition, rock wool board is lightweight, highly flame-retardant, and sound-absorbing and noise-reducing. Therefore, rock wool board is currently widely used in the insulation and sound insulation of building walls and roofs, as well as in the manufacture of fire walls and fire doors. To evaluate the ability of rock wool boards to maintain their shape and load-bearing capacity under external forces, companies usually need to test the flexural strength and flexural modulus of the rock wool boards. The three-point bending test method is currently commonly used to test the above properties of rock wool boards. That is, the two ends of the rock wool board are placed on a support platform, and then vertical pressure is applied from the center of the rock wool board until the rock wool board breaks. However, the above method actually tests the strength at the center of the rock wool board. Due to the influence of the production process, the performance of different parts of the rock wool board is not consistent, and even varies greatly. In this case, the test results obtained by the above test method are difficult to truly reflect the performance of the rock wool board being tested. Utility Model Content

[0003] To address the above-mentioned issues, the present invention provides a multi-point flexural strength testing device for rock wool boards. This device can simultaneously test the flexural strength of multiple locations on the rock wool board being tested, helping to more realistically and fully reflect the flexural performance of the rock wool board. Specifically, the present invention discloses the following technical solutions.

[0004] A multi-point flexural strength testing device for rock wool boards, comprising: a test bench, a support column, a top plate, a screw, a drive motor, a bearing platform, a pressing plate, a connecting plate and a pressure head. The support columns are fixed on both sides of the test bench, and the top plate is fixedly connected to the top of the support columns. A screw is provided in the middle of each of the two sides of the test bench, and the lower end of the screw is rotatably connected to the test bench, and the upper end is connected to the drive motor fixed on the top plate to drive the screw to rotate. Several bearing platforms are evenly and spaced apart and fixed on the upper surface of the test bench. The pressing plate is horizontally arranged above the bearing platform, and the two ends of the pressing plate are respectively threadedly connected to the screws on both sides of the test bench. The connecting plate is arranged above the pressing plate, and the two ends of the connecting plate are respectively slidably connected to the screws on both sides of the test bench. There is a pressure head corresponding to the center between every two adjacent bearing platforms. These pressure heads are all fixed on the connecting plate, and the pressing plate has an opening for the pressure head above it to pass through.

[0005] Furthermore, the connecting plate is connected to a lifting device fixed on the top plate to drive the connecting plate and the pressure head to rise and fall.

[0006] Furthermore, the press plate is also slidably sleeved on the support column through the sliding hole on its plate surface, and the side wall of the press plate has a threaded hole connected to the sliding hole, and a positioning bolt is threaded in the threaded hole to fasten the press plate to the support column.

[0007] Furthermore, the lower end of the lead screw is rotatably connected to the test bench via a bearing, and the bearing is fixedly mounted on the upper surface of the test bench.

[0008] Furthermore, the test platform between the adjacent supporting platforms has a discharge port running through the upper and lower sides thereof, so that the rock wool board debris generated during the test process can automatically fall under the test platform.

[0009] Furthermore, the bearing platform is supported in the air by a bracket, and a collecting bucket is provided below the discharge port to collect the rock wool board debris.

[0010] Furthermore, the edge of the upper end surface of the supporting platform is rounded to prevent the rock wool board from being damaged during the test, thereby affecting the accuracy of the test results.

[0011] Furthermore, the lower surface of the pressing plate has protrusions corresponding one-to-one to the supporting platforms.

[0012] Compared with the prior art, the present invention has achieved at least the following beneficial effects: the testing device of the present invention can form a plurality of test sites by fixing the supporting platforms at intervals on the test platform, and then by setting a pressure head at the center between every two adjacent supporting platforms, the rock wool board placed on the supporting platform can be subjected to flexural resistance tests at multiple sites under the same test conditions and environment, and by calculating the average value of the test results at these different sites, it helps to more truly and fully reflect the flexural resistance of the rock wool board. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0014] Figure 1 Schematic diagram of the structure of the multi-point flexural strength testing device for rock wool panels in the following embodiments;

[0015] Figure 2 Schematic diagram of the structure of the test platform and the supporting platform in the following embodiments;

[0016] Figure 3 Schematic diagram of the structure of the press plate in the following embodiments;

[0017] Figure 4 1 is a top view of the test bench in the following embodiments.

[0018] The symbols in the accompanying drawings represent: 1-test bench, 2-support column, 3-top plate, 4-screw, 5-drive motor, 6-bearing platform, 7-pressing plate, 8-connecting plate, 9-pressing head, 10-bearing seat, 11-rock wool board, 12-lifting device, 13-opening, 14-positioning bolt, 15-discharge port, 16-bracket, 17-collecting bucket, 601-test area, 701-screw hole, 702-bump. DETAILED DESCRIPTION

[0019] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0020] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to needs to have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0021] refer to Figure 1 、 Figure 2 and Figure 3 , which illustrates a multi-point flexural strength testing device for rock wool panels, comprising: a test platform 1, support columns 2, a top plate 3, a lead screw 4, a drive motor 5, a bearing platform 6, a pressing plate 7, a connecting plate 8, and a pressing head 9. The support columns 2 are four vertically arranged and fixed to the upper surfaces of the left and right sides of the test platform 1, respectively. The top plate 3 is horizontally fixed and supported on the top of the support columns 2. A lead screw 4 is vertically fixed to each of the upper surfaces of the left and right sides of the test platform 1, and the lead screw 4 is located between the two support columns 2 on the side on which it is located.

[0022] The middle portion of the lead screw 4 has a threaded section, with both the upper and lower portions of the threaded section being smooth. The lower end of the lead screw 4 is rotationally connected to the test bench 1 via a bearing. The bearing is fixedly mounted in a bearing seat 10 on the upper surface of the test bench 1, which is also fixedly connected to the test bench 1. The upper end of the lead screw 4 is connected to a drive motor 5 fixed to the top plate 3 to drive the lead screw 4 in rotation.

[0023] The four plate-shaped supporting platforms 6 are evenly and spaced apart and fixed on the upper surface of the test platform 1. These supporting platforms 6 are parallel to each other, so that a test area 601 is formed between every two adjacent supporting platforms 6. The pressing plate 7 is horizontally arranged directly above the supporting platform 6, and has screw holes 701 on both end surfaces of the pressing plate 7. The pressing plate 7 is threadedly connected to the threaded area of the corresponding screw 4 through the screw holes 701. By controlling the two driving motors 5 to operate synchronously, the two screws 4 are driven to lift the pressing plate 7, thereby pressing the rock wool board 11 placed on the supporting platform 6, facilitating the subsequent flexural performance test.

[0024] The connecting plate 8 is arranged above the pressing plate 7, and the two end surfaces of the connecting plate 8 have through holes. The connecting plate 8 is sleeved on the smooth area of the lead screw 4 on both sides of the test bench 1 through the through holes, so that the two are slidably connected, so that the lead screw 4 can not only realize the lifting and lowering of the pressing plate 7, but also play a guiding role for the connecting plate 8. A pressure head 9 is arranged above the center of each test area 601. These pressure heads 9 are all fixed on the connecting plate 8. The connecting plate 8 is connected to the lifting device 12 fixed on the top plate 3 to drive the connecting plate 8 and the pressure head 9 to rise and fall. The lifting device 12 can be a hydraulic device, etc., and the pressure head 9 has a pressure sensor to collect pressure change data during the test. The above-mentioned testing mechanism formed by the pressure head 9, lifting device 12, pressure sensor, terminal display and other components can refer to or adopt existing flexural strength testing equipment. The pressing plate 7 has an opening 13 for the pressure head 9 above it to pass through.

[0025] During the test, the rock wool board 11 to be tested is first placed on the supporting platform 6, and then the drive motor 5 is started to drive the screw 4 to rotate, thereby causing the pressing plate 7 to descend and press the rock wool board 11 onto the supporting platform 6, thus completing the installation and fixation of the rock wool board 11 to be tested. Then the lifting device 12 is started to drive the connecting plate 8 and the pressure head 9 to descend, so that the pressure head 9 gradually presses down the rock wool board 11 to test the flexural strength. As the pressure head 9 continues to squeeze the rock wool board 11, the required pressure gradually increases until the rock wool board 11 is broken. The maximum pressure value before the break is the flexural strength of the rock wool board 11. After the test is completed, the pressing plate 7, the connecting plate 8, and the pressure head 9 are lifted, and the rock wool board 11 is removed. It should be understood that the movement of the connecting plate 8 is always above the threaded area of the screw 4. The testing device of this embodiment forms multiple test sites through the support platform 6. It can test the rock wool board 11 placed on the support platform 6 at multiple sites under the same test conditions and environment. By calculating the average value of the test results at these different sites, it helps to more truly and fully reflect the flexural performance of the rock wool board. In addition, by observing the difference in the test results at each site, it can be determined whether there is a weak area in the tested rock wool board 11, and then it can be concluded that the tested rock wool board 11 is likely defective, and the obtained flexural performance results cannot truly reflect the performance of the rock wool board, and retesting is necessary. In addition, by analyzing the cross-section of the weak area, the cause of the problem can be found, facilitating the improvement of the production process.

[0026] In another embodiment, reference Figure 1 The compression plate 7 of the above embodiment is also slidably mounted on the support column 2 via sliding holes on its end surfaces. The sidewalls of the compression plate 7 have threaded holes connected to the sliding holes, into which positioning bolts 14 are threadedly connected. After the compression plate 7 is used to compress the rock wool board 11, the positioning bolts 14 are tightened to secure the compression plate 7 to the support column 2, further securing the compression plate 7 and the rock wool board 11. After testing, the positioning bolts 14 are first reversed and loosened, and then the motor 5 is activated to drive the lead screw 4 to rotate, causing the compression plate 7 to rise and disengage from the rock wool board 11, facilitating removal of the rock wool board 11.

[0027] In another embodiment, reference Figure 1 The upper end edge of the supporting platform 6 in the above embodiment is rounded to prevent the rock wool board 11 from being squeezed by the sharp edges of the supporting platform 6 during testing and being damaged in advance, thereby affecting the accuracy of the test results.

[0028] In another embodiment, reference Figure 1 and Figure 3 The lower surface of the pressing plate in the above embodiment has protrusions 702 corresponding to the supporting platforms one by one to press the rock wool board 11 on the supporting platform 6.

[0029] In another embodiment, reference Figure 4 In the above embodiment, the test platform 1 between adjacent supporting platforms 6 has a discharge port 15 extending through the upper and lower surfaces thereof, so that debris generated by the crushing of the rock wool board 11 during the test process automatically falls below the test platform 1. In a further embodiment, the supporting platform 6 is supported in the air by a bracket 16, and a collection bucket 17 is provided below the discharge port 15 to collect the debris generated by the crushing of the rock wool board 11, thereby overcoming the problem of debris falling into the testing area 601 and being difficult to clean.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A multi-point flexural strength testing device for rock wool boards, characterized in that: include: A test bench, with support columns fixed on both sides and a top plate fixed on the top of each support column; A lead screw is provided at the middle of each side of the test bench, and the lower end of the lead screw is rotatably connected to the test bench, and the upper end of the lead screw is connected to the drive motor fixed on the top plate; A plurality of carrying platforms are evenly and spaced apart and fixed on the upper surface of the test bench; A pressing plate, the pressing plate is horizontally arranged above the bearing platform, and the two ends of the pressing plate are respectively threadedly connected to the lead screws on both sides of the test platform; A connecting plate, the connecting plate being arranged above the pressing plate, and the two ends of the connecting plate being slidably connected to the lead screws on both sides of the test bench respectively; A pressure head is provided at the center between every two adjacent bearing platforms. These pressure heads are fixed on the connecting plate, and the pressing plate has an opening for the pressure head to pass through.

2. The multi-point flexural strength testing device for rock wool board according to claim 1, characterized in that: The connecting plate is connected to a lifting device fixed on the top plate.

3. The multi-point flexural strength testing device for rock wool board according to claim 1, characterized in that: The pressing plate is also slidably sleeved on the supporting column through the sliding hole on its plate surface, and a threaded hole communicating with the sliding hole is provided on the side wall of the pressing plate, and a positioning bolt is threadedly connected in the threaded hole.

4. The multi-point flexural strength testing device for rock wool board according to claim 1, characterized in that: The lower end of the lead screw is rotatably connected to the test bench via a bearing, and the bearing is fixedly mounted on the upper surface of the test bench.

5. The multi-point flexural strength testing device for rock wool board according to claim 1, characterized in that: The edge of the upper end surface of the supporting platform is a rounded structure.

6. The multi-point flexural strength testing device for rock wool board according to claim 1, characterized in that: The lower surface of the pressing plate is provided with protrusions corresponding to the bearing platforms one by one.

7. The multi-point flexural strength testing device for rock wool board according to any one of claims 1 to 6, characterized in that: The test platform between the adjacent supporting platforms is provided with a discharge port running through the upper and lower sides thereof.

8. The multi-point flexural strength testing device for rock wool board according to claim 7, characterized in that: The bearing platform is supported in the air by a bracket, and a collecting bucket is provided below the discharge port.

Images