A pavement brick breaking strength detection instrument

Abstract

The utility model discloses a kind of road brick flexural strength detection instruments, it is related to building material detection equipment technical field, including base, the top surface of base is fixedly installed with workbench, workbench is movably connected with top plate between pressing plate, and pressing plate slidingly covers and is externally arranged in four groups of supporting rod, the top surface center of top plate is fixedly installed with hydraulic press, the output end of hydraulic press is through top plate and is fixedly connected with the top surface of pressing plate, the bottom surface of pressing plate is fixedly installed with loading pressure head, the top surface of workbench is slidably installed with two groups of supporting roller seat, the inside of workbench is fixedly installed with span self-adjusting assembly, span self-adjusting assembly includes two groups of transmission plate, two groups of transmission plate are rotatably installed in the inside of workbench, realize flexible control to road brick test piece supporting distance by span self-adjusting assembly, can according to the size of different specifications road brick test piece, the relative distance of two groups of supporting roller seat is adjusted quickly, effectively improve detection efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of building material testing equipment, specifically a paving brick flexural strength testing instrument. Background Technology

[0002] The flexural strength testing instrument for paving bricks is a mechanical testing device specifically designed to determine the flexural tensile strength of specimens such as concrete paving bricks, permeable bricks, and natural stone. It can effectively eliminate human operation errors, ensure that the test results meet the requirements of engineering quality standards and specifications, and provide a scientific basis for the selection of road engineering materials.

[0003] Existing conventional paving brick testing equipment typically uses manual bolt tightening or graded hole fixing when adjusting the support span. During the test preparation stage, the operator needs to manually loosen the fasteners at the bottom of each support roller seat according to the specimen size. Then, referring to the scale markings on the workbench surface, the two sets of support roller seats are moved to the predetermined coordinate points. Finally, manual tightening and correction are performed again. The entire centering adjustment process is highly dependent on manual visual inspection and manual intervention, and lacks an automated positioning benchmark.

[0004] However, repeated manual loading, unloading and calibration are not only time-consuming and labor-intensive, but also increase the labor intensity of operators when testing large batches of specimens. At the same time, adjusting the two sets of support rollers one by one will also cause displacement deviation, causing the center line of the specimen to deviate from the loading axis, resulting in eccentric load error, which in turn directly interferes with the authenticity of the flexural strength test data and reduces the reliability of the test results. Utility Model Content

[0005] The purpose of this invention is to provide an instrument for testing the flexural strength of paving bricks, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A paving brick flexural strength testing instrument includes a base, a workbench fixedly installed on the top surface of the base, a top plate installed above the workbench, and the two are fixedly connected by four sets of support rods. A pressure plate is movably connected between the workbench and the top plate, and the pressure plate is slidably sleeved on the outside of the four sets of support rods. A hydraulic press is fixedly installed at the center of the top surface of the top plate, and the output end of the hydraulic press passes through the top plate and is fixedly connected to the top surface of the pressure plate.

[0008] A loading head is fixedly installed on the bottom surface of the pressure plate. Two sets of support roller seats are symmetrically slidably installed on the top surface of the workbench. A span self-adjusting assembly is fixedly installed inside the workbench. The span self-adjusting assembly includes two sets of transmission plates. Both sets of transmission plates are rotatably installed inside the workbench. Mounting blocks are rotatably installed on the top surfaces of the two sets of transmission plates at opposite ends. The top surfaces of the two sets of mounting blocks are fixedly connected to the bottom ends of the corresponding support roller seats.

[0009] As a further embodiment of this utility model, a drive motor is fixedly installed inside the workbench, and a drive disk is fixedly sleeved on the output end of the drive motor. The drive disk is rhomboid in shape and has two acute-angled tips, and the two acute-angled tips of the drive disk are respectively rotatably connected to the corresponding transmission plates.

[0010] As a further embodiment of this utility model, a flexible compensation buffer layer is fixedly installed on the side of the loading head and the two sets of support roller seats that are close to each other. The flexible compensation buffer layer is made of hard rubber gasket.

[0011] As a further embodiment of this utility model, a protective component is fixedly installed between the workbench and the top plate. The protective component includes a fixing plate, which is fixedly installed between the workbench and the top plate. Folding protective covers are fixedly connected to both sides of the fixing plate.

[0012] As a further embodiment of this utility model, a connecting plate is fixedly installed at the end of each of the two sets of folding protective covers away from the fixed plate, and magnetic strips are embedded on the opposite surfaces of the two sets of connecting plates, and the two are magnetically attracted by the magnetic strips.

[0013] As a further embodiment of this utility model, buckles and blocks are fixedly installed on the outer sides of the two sets of connecting plates, and the buckles and blocks are engaged with each other.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. When using the paving brick flexural strength testing instrument of this utility model, the span self-adjusting component enables flexible control of the support spacing of the paving brick specimen. The drive motor drives the drive disc to rotate synchronously, causing two sets of symmetrically distributed transmission plates to swing and displace, thereby transmitting power to the mounting block, which then slides synchronously and in opposite directions within the preset moving groove track. This allows for rapid adjustment of the relative distance between the two sets of support roller seats according to the size of paving brick specimens of different specifications, effectively improving testing efficiency and ensuring the reliability of test results.

[0016] 2. When using the paving brick flexural strength testing instrument of this utility model, a safety barrier is constructed for the flexural strength testing process through protective components. The retractable folding protective cover forms a physical isolation space. During operation, the moving wheels and sliding grooves guide the folding protective cover to unfold smoothly. The magnetic strip achieves initial attraction, and further, the buckles and locking blocks are used to achieve secondary locking to ensure stability. At the critical moment when the paving brick specimen undergoes brittle fracture due to the ultimate load, it can effectively prevent high-energy debris from flying outward, ensuring the cleanliness of the laboratory environment, while providing reliable safety protection for the operator. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a paving brick flexural strength testing instrument.

[0018] Figure 2 This is a schematic diagram of the loading head in a paving brick flexural strength testing instrument.

[0019] Figure 3 This is a cross-sectional view of the span self-adjusting component in a paving brick flexural strength testing instrument.

[0020] Figure 4 This is a structural breakdown diagram of the span self-adjusting component in a paving brick flexural strength testing instrument.

[0021] Figure 5 This is a structural breakdown diagram of the protective component in a paving brick flexural strength testing instrument.

[0022] Figure 6 for Figure 5 Enlarged view of point A in the image.

[0023] In the diagram: 1. Base; 2. Workbench; 3. Top plate; 4. Support rod; 5. Pressure plate; 6. Hydraulic press; 7. Loading head; 8. Support roller seat;

[0024] 9. Span self-adjusting assembly; 901. Transmission plate; 902. Mounting block; 903. Drive motor; 905. Drive disc; 906. Moving slot;

[0025] 10. Control and display terminal; 11. Protective components; 111. Fixing plate; 112. Folding protective cover; 113. Connecting plate; 114. Magnetic strip; 115. Moving wheel; 116. Slide groove; 117. Buckle; 118. Block; 12. Flexible compensation buffer layer. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1 , Figure 2 , Figure 3 In this embodiment of the utility model, a paving brick flexural strength testing instrument includes a base 1, a workbench 2 fixedly installed on the top surface of the base 1, a top plate 3 installed above the workbench 2, and the two are fixedly connected by four sets of rectangularly distributed support rods 4. A pressure plate 5 is movably connected between the workbench 2 and the top plate 3, and the pressure plate 5 is slidably sleeved on the outside of the four sets of support rods 4. A hydraulic press 6 is fixedly installed at the center of the top surface of the top plate 3 to provide a power source. The output end of the hydraulic press 6 penetrates vertically downward through the top plate 3 and is fixedly connected to the top surface of the pressure plate 5.

[0028] A loading head 7 is fixedly installed on the bottom surface of the pressure plate 5. Two sets of support roller seats 8 are symmetrically slidably installed on the top surface of the workbench 2. The paving brick specimen spans across the two sets of support roller seats 8 and is located directly below the loading head 7. A span self-adjusting component 9 is fixedly installed inside the workbench 2 to synchronously adjust the support span and realize the synchronous symmetrical movement of the two sets of support roller seats 8. It can quickly adapt to paving brick specimens of different sizes and specifications. The span self-adjusting component 9 includes two sets of transmission plates 901. Both sets of transmission plates 901 are rotatably installed inside the workbench 2. The top surfaces of the two sets of transmission plates 901 that are far apart are rotatably installed with mounting blocks 902 through pins. The top surfaces of the two sets of mounting blocks 902 are respectively fixedly connected to the bottom end of the corresponding support roller seat 8.

[0029] It should be noted that the upper and lower ends of the four sets of support rods 4 are fixedly connected to the workbench 2 and the top plate 3 respectively to ensure the vertical stability during the loading process and effectively prevent the pressure plate 5 from shifting laterally when under force. A control display terminal 10 is fixedly installed on the outside of the base 1. The control display terminal 10 includes an electronic housing, which is fixedly installed on the outside of the base 1 by bolts. The electronic housing is equipped with an LCD screen and operation buttons. Through its built-in sensors, it displays the current load curve, maximum peak force and loading rate in real time, realizing digital monitoring of the detection process.

[0030] Please see Figure 3 , Figure 4The workbench 2 is equipped with a drive motor 903. The output end of the drive motor 903 is fixedly fitted with a drive disk 905. The drive disk 905 is rhomboid with two acute angles. The two acute angles of the drive disk 905 are rotatably connected to the corresponding transmission plate 901 through pins.

[0031] It should be noted that two sets of moving grooves 906 are symmetrically opened on the top surface of the workbench 2 along the horizontal center line. The two sets of mounting blocks 902 are respectively embedded in the corresponding moving grooves 906 and can slide back and forth along their length. The moving grooves 906 are used to provide motion trajectory constraints for the mounting blocks 902, and the side walls of the moving grooves 906 are used to horizontally limit the mounting blocks 902 to prevent the support roller seat 8 from shifting or tilting when under pressure.

[0032] Please see Figure 2 , Figure 3 , Figure 4 Flexible compensation buffer layer 12 is fixedly installed on the side of the loading head 7 and the two sets of support roller seats 8 that are close to each other. The flexible compensation buffer layer 12 is made of hard rubber pads.

[0033] When the hydraulic press 6 drives the loading head 7 to move downward and contact the specimen, the deformation compensation capability of the hard rubber pad can effectively absorb the unevenness or slight tilting deviation of the surface of the paving brick specimen caused by the production process, transforming the original rigid point contact into a uniform flexible contact, thereby eliminating the interference of local stress concentration on the authenticity of the test data and effectively improving the accuracy of the flexural strength test.

[0034] Please see Figure 5 , Figure 6 A protective assembly 11 is fixedly installed between the workbench 2 and the top plate 3. The protective assembly 11 includes a fixing plate 111, which is fixedly installed between the workbench 2 and the top plate 3. Folding protective covers 112 are fixedly connected to both sides of the fixing plate 111.

[0035] Two sets of folding protective covers 112 are each fixedly installed with a connecting plate 113 at the end away from the fixed plate 111. Magnetic strips 114 are embedded on the opposite surfaces of the two sets of connecting plates 113, and the two are magnetically attracted by the magnetic strips 114 to close the protective space.

[0036] It should be noted that two sets of movable wheels 115 are rotatably installed at the upper and lower ends of the folding protective cover 112. The top surface of the workbench 2 and the bottom surface of the top plate 3 are provided with sliding grooves 116, and the two sets of movable wheels 115 are respectively embedded in the corresponding sliding grooves 116 to constrain the folding protective cover 112 to extend and retract smoothly along the predetermined trajectory.

[0037] The outer sides of the two sets of connecting plates 113 are respectively fixedly installed with buckles 117 and blocks 118, and the buckles 117 and blocks 118 are engaged with each other. When the two sets of connecting plates 113 are magnetically closed, they are tightened again by the engagement of buckles 117 and blocks 118 to ensure that the folding protective cover 112 will not accidentally pop open when the specimen breaks and generates impact force.

[0038] The working principle of this utility model is as follows:

[0039] When this utility model is used, before testing, the drive motor 903 drives the drive disk 905 to rotate, which in turn drives the two sets of transmission plates 901 to swing. The transmission plates 901 drive the two sets of mounting blocks 902 to make symmetrical reciprocating motion in the moving groove 906 through the pin shaft, thereby realizing the adjustment of the span of the two sets of support roller seats 8.

[0040] After adjustment, the operator pulls the folding protective cover 112, which drives the moving wheel 115 to move along the slide 116 until the two sets of connecting plates 113 contact each other. The magnetic strip 114 attracts the two sets of folding protective covers 112 to be initially fixed. Then, the buckle 117 is used to engage with the locking block 118 to achieve secondary locking, thereby forming a closed space in the testing area. When the specimen is subjected to pressure and fractures, generating high-energy debris impact, the folding protective cover 112 can effectively block the debris from flying, ensuring the safety of the operator.

[0041] After adjustment, the operator places the paving brick specimen flat on the two sets of support roller seats 8, starts the hydraulic press 6, and pushes the pressure plate 5 downward. At the same time, the pressure plate 5 descends smoothly under the guidance and constraint of the four sets of support rods 4 to prevent lateral displacement. This drives the loading head 7 to apply a vertical load to the center line of the paving brick specimen. At this time, the control display terminal 10 collects load data in real time through sensors and automatically records the maximum peak force when the specimen breaks, thereby calculating the flexural strength. Furthermore, at the moment the pressure head contacts the specimen, the elastic deformation of the flexible compensation buffer layer 12 is used to absorb the slight flatness deviation or tilt of the paving brick specimen surface, effectively eliminating the stress concentration caused by the unevenness of the paving brick specimen surface, making the test results closer to the true flexural performance of the material.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A paving brick flexural strength testing instrument, comprising a base (1), characterized in that, A workbench (2) is fixedly installed on the top surface of the base (1), and a top plate (3) is installed above the workbench (2). The two are fixedly connected by four sets of support rods (4). A pressure plate (5) is movably connected between the workbench (2) and the top plate (3). The pressure plate (5) is slidably sleeved on the outside of the four sets of support rods (4). A hydraulic press (6) is fixedly installed at the center of the top surface of the top plate (3). The output end of the hydraulic press (6) passes through the top plate (3) and is fixedly connected to the top surface of the pressure plate (5). The bottom surface of the pressure plate (5) is fixedly installed with a loading head (7), and the top surface of the workbench (2) is symmetrically and slidably installed with two sets of support roller seats (8). The workbench (2) is fixedly installed with a span self-adjusting assembly (9). The span self-adjusting assembly (9) includes two sets of transmission plates (901). Both sets of transmission plates (901) are rotatably installed inside the workbench (2). The top surfaces of the two sets of transmission plates (901) that are far apart are rotatably installed with mounting blocks (902), and the top surfaces of the two sets of mounting blocks (902) are respectively fixedly connected to the bottom end of the corresponding support roller seat (8).

2. The flexural strength testing instrument for paving bricks according to claim 1, characterized in that, The workbench (2) is fixedly installed with a drive motor (903). The output end of the drive motor (903) is fixedly fitted with a drive disk (905). The drive disk (905) is rhomboid with two acute-angled tips, and the two acute-angled tips of the drive disk (905) are rotatably connected to the corresponding transmission plate (901).

3. The flexural strength testing instrument for paving bricks according to claim 1, characterized in that, A flexible compensation buffer layer (12) is fixedly installed on the side of the loading head (7) and the two sets of support roller seats (8) that are close to each other. The flexible compensation buffer layer (12) is made of hard rubber pads.

4. The flexural strength testing instrument for paving bricks according to claim 1, characterized in that, A protective assembly (11) is fixedly installed between the workbench (2) and the top plate (3). The protective assembly (11) includes a fixing plate (111). The fixing plate (111) is fixedly installed between the workbench (2) and the top plate (3). Folding protective covers (112) are fixedly connected to both sides of the fixing plate (111).

5. The flexural strength testing instrument for paving bricks according to claim 4, characterized in that, Both sets of folding protective covers (112) have a connecting plate (113) fixedly installed at the end away from the fixing plate (111). The opposite surfaces of the two sets of connecting plates (113) are embedded with magnetic strips (114), and the two are magnetically attracted by the magnetic strips (114).

6. The flexural strength testing instrument for paving bricks according to claim 5, characterized in that, The outer sides of the two sets of connecting plates (113) are respectively fixedly installed with buckles (117) and blocks (118), and the buckles (117) and blocks (118) are engaged with each other.

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