Strength testing device for research and development of rock wool sandwich panel

Abstract

The utility model provides a strength testing device for research and development of a rock wool sandwich panel, and relates to the technical field of performance testing of building materials. The workbench is of a square structure, and a supporting plate is arranged below the workbench. A circular matching hole is formed in the central position of the workbench; four long-strip-shaped adjusting holes are distributed in the surface of the workbench in a divergent mode. According to the utility model, by arranging the centering adjusting mechanism, the pressure is ensured to be uniformly transmitted along the vertical direction of the sample, and the large error of a test result caused by non-uniform stress distribution due to eccentric loading is avoided; the problems that when an existing strength testing device is used for detection, if the position of a sample is not subjected to centering adjustment and loading force deviates from a center line, the sample can bear a certain bending moment (bending stress), and consequently the testing result is lower than the real compressive strength are solved; and manual centering depends on the experience of an operator, so that multiple test results may fluctuate.

Description

Technical Field

[0001] This utility model belongs to the field of building material performance testing technology, and more specifically, it relates to a strength testing device for the research and development of rock wool sandwich panels. Background Technology

[0002] Rock wool sandwich panels, as a lightweight and high-strength composite building material, are widely used in building exterior walls and partition structures. Their core performance indicators include compressive strength, flexural strength, and shear strength, and their properties need to be verified through experimental testing during the research and development process. Existing technologies for testing the compressive strength of rock wool sandwich panels have the following shortcomings:

[0003] First, the device lacks an effective mechanism for precise adjustment and centering of the plate position. In actual operation, operators usually rely on personal experience to manually adjust the plate position, which makes it difficult to ensure that the plate is in the ideal test center position. As a result, during the test, the pressure applied by the pressure head is very likely to deviate from the center of the plate, affecting the accuracy and reliability of the test results.

[0004] Secondly, there is a stability problem when conducting compressive strength testing on sheet metal. Due to the lack of sufficient constraint mechanism in the device, the sheet metal may slip slightly on the workbench surface, and its sides often warp. This instability will seriously weaken the pressing effect of the indenter on the target testing area, making the test data unable to truly reflect the compressive strength performance of the sheet metal. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a strength testing device for the research and development of rock wool sandwich panels. This device solves the problem that when using existing strength testing devices, if the sample position is not properly aligned and the applied force deviates from the center line, the sample will be subjected to a certain bending moment (bending stress), resulting in test results lower than the actual compressive strength. Furthermore, manual alignment relies on the operator's experience, which may lead to fluctuations in test results.

[0006] This utility model provides a strength testing device for the research and development of rock wool sandwich panels, which is achieved by the following specific technical means:

[0007] A strength testing device for the research and development of rock wool sandwich panels includes a worktable. The worktable has a square structure with a support plate underneath. A circular mating hole is located in the center of the worktable. Four elongated adjustment holes are distributed radially on the surface of the worktable. In addition, multiple sets of limiting holes are also provided on the worktable. An upper support frame is fixedly installed on the upper support frame by welding. A pressure cylinder is fixedly connected to the upper support frame, and a test pressure head is fixedly connected to the piston rod of the pressure cylinder. Two sets of centering adjustment mechanisms are arranged below the worktable, each set including a fixed support plate. The lower part of the worktable is fixedly connected to a rotating support through the fixed support plate. The rotating support is rotatably connected to a lead screw through a bearing. A first limiting plate is fixedly connected to both ends of the lead screw, and the first limiting plate is locked onto the rotating support. On the base, one end of the lead screw is also equipped with an adjustment handle; the lead screw is provided with two sections of threads with opposite helical directions, and two sets of threaded cylinders are sleeved on the lead screw. These two sets of threaded cylinders are respectively connected to the two sections of threads on the lead screw to form a helical transmission relationship. An adjustment plate is fixedly connected to the threaded cylinder, and a reinforcing rib is provided at the connection between the adjustment plate and the threaded cylinder. The adjustment plate extends to the top of the worktable through the adjustment hole; a sliding auxiliary mechanism is also provided below the worktable. The sliding auxiliary mechanism includes a support circular plate, which is arranged parallel to the worktable. Accommodating holes are evenly distributed in a ring on the support circular plate, and a ball is rolled in each accommodating hole; a set of clamping and limiting components is provided in each set of limiting holes. The clamping and limiting components include a lower clamping plate, a threaded rod is fixedly connected to the lower clamping plate, and through holes are opened on both sides of the threaded rod. An upper clamping plate is sleeved on the threaded rod.

[0008] Furthermore, a second limiting plate is fixedly connected to each side of the adjustment hole of the workbench, and the adjustment plate is restricted between the two sets of second limiting plates.

[0009] Furthermore, the central axis of the pressure cylinder is perpendicular to the worktable, and the center of the mating hole and the center of the supporting circular plate are both directly below the test pressure head.

[0010] Furthermore, an electric telescopic rod is connected to the bottom of the supporting circular plate, and the central axis of the electric telescopic rod is perpendicular to the supporting circular plate; the electric telescopic rod is fixedly connected to the lower support frame, and the lower support frame is fixed to the workbench by welding; a guide sleeve is provided on the lower support frame, and a guide post is inserted through the guide sleeve, one end of the guide post is fixedly connected to the supporting circular plate, and the central axis of the guide post is perpendicular to the supporting circular plate.

[0011] Furthermore, the limiting holes are also elongated, with two limiting holes forming a group, for a total of four groups; the two limiting holes in each group are arranged parallel to each other, and the four groups of limiting holes are distributed perpendicular to the four sides of the worktable.

[0012] Furthermore, a positioning pin is inserted into the lower clamping plate and the threaded rod. A connecting plate is fixedly connected to one end of the positioning pin. The connecting plate passes through the hole and is fixedly connected to pressure rings at both ends. The pressure rings are pressed against the upper clamping plate. At the same time, a fastening nut is threadedly connected to the threaded rod and is secured to the upper clamping plate.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This utility model, by setting up a centering adjustment mechanism, adjusts the position of the plate before conducting the compressive strength test, so that its central axis is completely aligned with the force axis of the loading device, ensuring that the pressure is uniformly transmitted along the vertical direction of the sample, avoiding uneven stress distribution due to eccentric loading, which could lead to large errors in the test results.

[0015] 2. This utility model reduces the friction force that the plate needs to overcome during the centering and adjustment process by setting a sliding auxiliary mechanism, thereby reducing the amount of force required for the operator to turn the adjustment handle.

[0016] 3. This utility model, by setting up a clamping and limiting component, uses the upper and lower clamping plates to clamp and limit the edge of the plate, preventing the plate from warping up on both sides during the compressive strength test, thus reducing the stamping effect of the plate at the test position and improving the test effect. Attached Figure Description

[0017] Figure 1 This is a side top view of the present invention.

[0018] Figure 2 This is a side-view of the present invention.

[0019] Figure 3 This is a schematic diagram of the centering adjustment mechanism of this utility model.

[0020] Figure 4 This is a schematic diagram of the sliding auxiliary mechanism of this utility model.

[0021] Figure 5 This is a schematic diagram of the clamping and limiting mechanism of this utility model.

[0022] Figure 6 This is an exploded view of the clamping and limiting component of this utility model.

[0023] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0024] 1. Workbench; 101. Mating hole; 102. Adjusting hole; 103. Limiting hole; 2. Upper support frame; 3. Pressure cylinder; 4. Test head; 5. Fixed support plate; 6. Rotating support; 7. Lead screw; 8. First limiting plate; 9. Adjusting handle; 10. Threaded cylinder; 11. Adjusting plate; 12. Reinforcing rib; 13. Second limiting plate; 14. Supporting circular plate; 1401. Accommodating hole; 15. Ball bearing; 16. Electric telescopic rod; 17. Lower support frame; 18. Guide sleeve; 19. Guide column; 20. Lower clamping plate; 21. Threaded rod; 2101. Through hole; 22. Upper clamping plate; 23. Positioning column; 24. Connecting plate; 25. Pressure ring; 26. Fastening nut. Detailed Implementation

[0025] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model. Example:

[0026] As attached Figure 1 To be continued Figure 6 As shown:

[0027] This utility model provides a strength testing device for the research and development of rock wool sandwich panels. The device includes a workbench 1; the workbench 1 has a square structure and a support plate is provided below it; a circular mating hole 101 is provided in the center of the workbench 1; four elongated adjustment holes 102 are distributed in a radiating pattern on the surface of the workbench 1; in addition, multiple sets of limiting holes 103 are provided on the workbench 1; an upper support frame 2 is fixedly installed on the upper support frame 1 by welding, and a pressure cylinder 3 is fixedly connected to the upper support frame 2. A test pressure head 4 is fixedly connected to the piston rod of the pressure cylinder 3; two sets of centering adjustment mechanisms are provided below the workbench 1, and each set of centering adjustment mechanisms includes a fixed support plate 5; the lower part of the workbench 1 is fixedly connected to a rotating support 6 through the fixed support plate 5, and the rotating support 6 is rotatably connected to a lead screw 7 through a bearing. First limiting plates 8 are fixedly connected to both ends of the lead screw 7, and the first limiting plates 8 are locked on the rotating support 6. One end of the lead screw 7 is also provided with an adjustment... The screw 7 has two sections of threads with opposite directions. Two sets of threaded cylinders 10 are fitted onto the screw 7, forming a helical transmission connection with the two sections of threads on the screw 7. An adjusting plate 11 is fixedly connected to each threaded cylinder 10. A reinforcing rib 12 is provided at the connection between the adjusting plate 11 and the threaded cylinder 10. The adjusting plate 11 extends above the worktable 1 through an adjusting hole 102. A sliding auxiliary mechanism is also provided below the worktable 1. The system includes a support circular plate 14, which is parallel to the worktable 1. The support circular plate 14 has accommodating holes 1401 arranged in a uniform ring on it, and each accommodating hole 1401 is connected to a rolling ball 15. Each set of limiting holes 103 is provided with a set of clamping and limiting components. The clamping and limiting components include a lower clamping plate 20, a threaded rod 21 is fixedly connected to the lower clamping plate 20, and through holes 2101 are opened on both sides of the threaded rod 21. An upper clamping plate 22 is sleeved on the threaded rod 21.

[0028] Among them, such as Figure 3 As shown, on both sides of the adjustment hole 102 of the workbench 1, a second limiting plate 13 is fixedly connected. The adjustment plate 11 is restricted between the two sets of second limiting plates 13 to ensure the stability of the movement of the adjustment plate 11. After the test plate is placed on the workbench 1, the lead screw 7 is rotated by rotating the adjustment handle 9. The two sets of threaded cylinders 10 connected to the lead screw 7 by screw drive approach each other. During this process, the test plate is continuously pushed towards the middle until the test plate is stuck between the two sets of threaded cylinders 10. At this time, the center of the plate and the center of the mating hole 101 are on the same vertical line.

[0029] Among them, such as Figure 1As shown, the central axis of the pressure cylinder 3 is perpendicular to the worktable 1. The center position of the mating hole 101 and the center position of the support circular plate 14 are both directly below the test head 4. After vertical alignment, the load is uniformly transmitted along the axial direction, and the test results only reflect the pure compressive properties of the material.

[0030] Among them, such as Figure 4 As shown, an electric telescopic rod 16 is connected to the bottom of the supporting circular plate 14, and the central axis of the electric telescopic rod 16 is perpendicular to the supporting circular plate 14; the electric telescopic rod 16 is fixedly connected to the lower support frame 17, and the lower support frame 17 is fixed to the workbench 1 by welding; a guide sleeve 18 is provided on the lower support frame 17, and a guide post 19 is inserted through the guide sleeve 18, one end of the guide post 19 is fixedly connected to the supporting circular plate 14, and the central axis of the guide post 19 is perpendicular to the supporting circular plate 14; before adjusting and aligning the plate, the electric telescopic rod 16 is used to adjust the plate. The telescopic rod 16 raises the support plate 14, and the stability of the support plate 14 during the lifting process is ensured by the cooperation of the guide sleeve 18 and the guide column 19. The test plate is supported by the ball bearings 15. During centering, the ball bearings 15 reduce the friction force that the plate needs to overcome to move, so the operator does not need to spend too much effort to turn the adjustment handle 9. After centering is completed, the support plate 14 is lowered below the mating hole 101, and the adjustment handle 9 is turned in the opposite direction. After the two sides of the plate are no longer clamped by the adjustment plate 11, they automatically fall onto the worktable 1.

[0031] Among them, such as Figure 1 As shown, the limiting holes 103 are also elongated, with two holes in each group, for a total of four groups; the two limiting holes 103 in each group are arranged parallel to each other, and the four groups of limiting holes 103 are distributed perpendicular to the four sides of the worktable 1; as shown Figure 6 As shown, a positioning pin 23 is inserted into the lower clamping plate 20 and the threaded rod 21. A connecting plate 24 is fixedly connected to one end of the positioning pin 23. The connecting plate 24 passes through the through hole 2101 and is fixedly connected to both ends with pressure rings 25. The pressure rings 25 are pressed against the upper clamping plate 22. At the same time, a fastening nut 26 is threadedly connected to the threaded rod 21 and is locked onto the upper clamping plate 22. After the test plate is aligned, the four sides of the plate are clamped and limited by the clamping and limiting component. The clamping and limiting component is moved within the limiting hole 103 so that the threaded rod 21 is locked onto the side of the plate. Then the fastening nut 26 is tightened, and the direction of the connecting plate 24 is limited by the positioning pin 23 so that the pressure ring 25 is locked onto the upper clamping plate 22. The edge of the plate is firmly clamped between the lower clamping plate 20 and the upper clamping plate 22.

[0032] The specific usage and function of this embodiment are as follows:

[0033] In this invention, the supporting circular plate 14 is raised to a height higher than the worktable 1 by the electric telescopic rod 16, and the stability of the supporting circular plate 14 during the lifting process is ensured by the cooperation of the guide sleeve 18 and the guide column 19. The test plate is placed on the supporting circular plate 14 and supported by the ball bearings 15. Then, by rotating the adjusting handle 9, the lead screw 7 is rotated, and the two sets of threaded cylinders 10 connected to the lead screw 7 are brought closer to each other. During this process, the test plate is continuously pushed towards the center until it is stuck between the two sets of threaded cylinders 10. At this time, the center of the plate and the center of the mating hole 101 are on the same vertical plane. On a straight line; after centering, lower the support plate 14 below the mating hole 101; rotate the adjusting handle 9 in the opposite direction, and the two sides of the plate will automatically fall onto the worktable 1 after losing the clamping of the adjusting plate 11; adjust the position of the clamping and limiting component in the limiting hole 103 so that the threaded rod 21 is stuck on the side of the plate, then tighten the fastening nut 26, and limit the direction of the connecting plate 24 through the positioning pin 23 so that the pressure ring 25 is firmly stuck on the upper clamping plate 22, and the edge of the plate is firmly clamped between the lower clamping plate 20 and the upper clamping plate 22; apply pressure to the plate through the pressure cylinder 3, and test the compressive strength of the plate through the test pressure head 4.

[0034] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

Claims

1. A strength testing device for the research and development of rock wool sandwich panels, the device comprising a workbench (1); the workbench (1) is square in shape, with a support plate below it; a circular mating hole (101) is provided in the center of the workbench (1); four elongated adjustment holes (102) are distributed in a radiating pattern on the surface of the workbench (1); in addition, multiple sets of limiting holes (103) are provided on the workbench (1); an upper support frame (2) is fixedly installed on the upper part of the workbench (1) by welding, a pressure cylinder (3) is fixedly connected to the upper support frame (2), and a test pressure head (4) is fixedly connected to the piston rod of the pressure cylinder (3); characterized in that: Two sets of centering adjustment mechanisms are provided below the workbench (1), each set of centering adjustment mechanisms includes a fixed support plate (5); the workbench (1) is fixedly connected to the rotating support (6) through the fixed support plate (5), the rotating support (6) is rotatably connected to the lead screw (7) through a bearing, and a first limit plate (8) is fixedly connected to both ends of the lead screw (7), the first limit plate (8) is locked on the rotating support (6), and an adjustment handle (9) is also provided at one end of the lead screw (7); the lead screw (7) is provided with two sections of threads with opposite spiral directions, and two sets of threaded cylinders (10) are sleeved on the lead screw (7), the two sets of threaded cylinders (10) respectively form a spiral transmission connection relationship with the two sections of threads on the lead screw (7), and an adjustment plate (11) is fixedly connected to the threaded cylinder (10), the adjustment plate (11) and the adjustment handle (9) are fixedly connected to the threaded cylinder (10), the adjustment handle (9 ... A reinforcing rib (12) is provided at the connection of the threaded cylinder (10), and the adjusting plate (11) extends to the top of the workbench (1) through the adjusting hole (102); a sliding auxiliary mechanism is also provided below the workbench (1), which includes a supporting circular plate (14), the supporting circular plate (14) and the workbench (1) are arranged parallel to each other, and the receiving holes (1401) are evenly distributed in a ring on the supporting circular plate (14), and each receiving hole (1401) is connected to a rolling ball (15); a set of clamping and limiting components is provided in each set of limiting holes (103), the clamping and limiting components include a lower clamping plate (20), a threaded rod (21) is fixedly connected to the lower clamping plate (20), and through holes (2101) are opened on both sides of the threaded rod (21), and an upper clamping plate (22) is sleeved on the threaded rod (21).

2. The strength testing device for rock wool sandwich panels as described in claim 1, characterized in that: On both sides of the adjustment hole (102) of the workbench (1), a second limiting plate (13) is fixedly connected, and the adjustment plate (11) is restricted between the two sets of second limiting plates (13).

3. The strength testing device for the research and development of rock wool sandwich panels as described in claim 1, characterized in that: The central axis of the pressure cylinder (3) is perpendicular to the worktable (1), and the center of the mating hole (101) and the center of the support plate (14) are both directly below the test head (4).

4. The strength testing device for rock wool sandwich panel research and development as described in claim 1, characterized in that: The bottom of the support circular plate (14) is connected to an electric telescopic rod (16), and the central axis of the electric telescopic rod (16) is perpendicular to the support circular plate (14). The electric telescopic rod (16) is fixedly connected to the lower support frame (17), and the lower support frame (17) is fixed to the workbench (1) by welding. A guide sleeve (18) is provided on the lower support frame (17), and a guide column (19) is inserted through the guide sleeve (18). One end of the guide column (19) is fixedly connected to the support circular plate (14), and the central axis of the guide column (19) is perpendicular to the support circular plate (14).

5. The strength testing device for rock wool sandwich panel research and development as described in claim 1, characterized in that: The limiting hole (103) is also elongated. The limiting holes (103) are arranged in pairs, with a total of four groups. The two limiting holes (103) in each group are arranged parallel to each other, and the four groups of limiting holes (103) are distributed perpendicular to the four sides of the worktable (1).

6. The strength testing device for the research and development of rock wool sandwich panels as described in claim 1, characterized in that: A positioning pin (23) is inserted into the lower clamping plate (20) and the threaded rod (21). A connecting plate (24) is fixedly connected to one end of the positioning pin (23). The connecting plate (24) passes through the through hole (2101) and is fixedly connected to both ends with pressure rings (25). The pressure rings (25) are pressed against the upper clamping plate (22). At the same time, a fastening nut (26) is threadedly connected to the threaded rod (21). The fastening nut (26) is locked onto the upper clamping plate (22).

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