A device for testing the compressive strength of concrete

Abstract

The present application relates to a kind of concrete compression resistance test device, including test table, the compression resistance testing mechanism being set on test table and feeding belt, one end of feeding belt is provided with feeding station, the other end is provided with test station, jig plate is equipped on feeding belt, jig plate is equipped with material plate for placing material to be measured, positioning center station is equipped between feeding station and test station on test table, positioning center station includes left-right centering mechanism, front-rear centering mechanism, compression resistance testing mechanism includes the upper pressure plate of being arranged at test station, jacking hydraulic cylinder, control panel is further equipped on test table, and the action of feeding belt, left-right centering mechanism, front-rear centering mechanism and jacking hydraulic cylinder is recorded to the pressure of the control panel of material to be measured to bear, material plate carrying material to be measured sequentially through left-right centering mechanism, front-rear centering mechanism after jig plate respectively carries out left-right centering, front-rear centering action and then enters compression resistance testing mechanism.

Description

Technical Field

[0001] This invention relates to the technical field of concrete performance testing devices, specifically a concrete compressive strength testing device. Background Technology

[0002] As the most crucial foundation material in construction engineering, concrete's compressive strength directly determines the load-bearing capacity and safety stability of a building structure. Therefore, its compressive strength must be rigorously tested before concrete is put into use. Currently, most existing concrete compressive strength testing devices employ manual feeding and positioning. Manual positioning makes it difficult to ensure that the material being tested is centered, and specimen misalignment can lead to uneven stress, resulting in testing errors and failing to accurately reflect the actual compressive strength of the concrete. Summary of the Invention

[0003] To address the aforementioned deficiencies in existing technologies, this invention provides a concrete compressive strength testing device. The device aims to solve problems such as low positioning accuracy in existing devices, achieving automated material transport, precise centering, and efficient compressive strength testing, thereby improving testing accuracy and efficiency. A concrete compressive strength testing device includes a test bench, a compressive strength testing mechanism mounted on the test bench, and a feeding belt. One end of the feeding belt has a loading station, and the other end has a testing station. A fixture plate is mounted on the feeding belt, and a material plate for placing the material to be tested is mounted on the fixture plate. A positioning and centering station is located on the test bench between the loading station and the testing station. The positioning and centering station includes a left-right centering mechanism and a front-back centering mechanism. The compressive strength testing mechanism includes an upper pressure plate and a lifting hydraulic cylinder located at the testing station. The test bench also has a control panel that controls the actions of the feeding belt, the left-right centering mechanism, the front-back centering mechanism, and the lifting hydraulic cylinder, and records the pressure borne by the material to be tested. The material plate carrying the material to be tested passes sequentially through the left-right centering mechanism and the front-back centering mechanism along with the fixture plate, performing left-right centering and front-back centering actions respectively before entering the compressive strength testing mechanism. The lifting hydraulic cylinder lifts the material plate to cooperate with the upper pressure plate in testing the compressive strength of the material to be tested.

[0004] Furthermore, the compression testing mechanism also includes a test bracket fixed to the test bench, a nut seat fixed on the test bracket, and a lifting adjustment screw that is threadedly engaged with the nut seat connected to the top surface of the upper pressure plate.

[0005] Furthermore, the jig plate is provided with a jig groove, the groove wall is provided with a guide slope, the bottom of the material plate is provided with a positioning protrusion that matches the shape of the jig groove, and the bottom of the jig groove is also provided with a clearance cutout corresponding to the lifting hydraulic cylinder.

[0006] Furthermore, the telescopic rod of the lifting hydraulic cylinder is set upward and fixedly connected to a lifting push block, and the bottom of the material plate is provided with an alignment groove that matches the shape of the lifting push block.

[0007] Furthermore, the jig slot is provided with clearance notches on both sides to facilitate loading or unloading of material plates.

[0008] Furthermore, the left and right centering mechanism includes a left and right centering bracket fixed on the test bench and a pair of left and right centering clamps respectively located on the left and right sides of the feeding belt. A first drive motor and a first rotating rod driven by the first drive motor are centrally located on the left and right centering bracket. The center of the first rotating rod is fixedly connected to the rotating shaft of the first drive motor. A set of left and right centering guide rails perpendicular to the conveying direction of the feeding belt are respectively provided on the left and right sides of the left and right centering bracket. A left and right centering slider is slidably connected on each set of left and right centering guide rails. A first movable rod is hinged to both ends of the first rotating rod. The tail end of the first movable rod is hinged to the corresponding left and right centering slider. Each left and right centering slider is connected to a left and right centering clamp.

[0009] Furthermore, the front and rear centering mechanism includes a front and rear centering bracket mounted on the test bench and a pair of front and rear centering clamps respectively located on the front and rear sides of the feeding belt. A second drive motor and a second rotating rod driven by the second drive motor are centrally mounted on the front and rear centering bracket. The center of the second rotating rod is fixedly connected to the rotating shaft of the second drive motor. A set of front and rear centering guide rails along the conveying direction of the feeding belt are respectively provided on the front and rear sides of the front and rear centering bracket. A front and rear centering slider is slidably connected on each set of front and rear centering guide rails. A second movable rod is hinged to both ends of the second rotating rod. The tail end of the second movable rod is hinged to the corresponding front and rear centering slider. Each front and rear centering slider is connected to a front and rear centering clamp. The test bench is also equipped with a lifting and positioning mechanism for driving the front and rear centering bracket to rise and fall.

[0010] Furthermore, the feeding belt is equipped with positioning sensors at the loading station, positioning centering station, and testing station, which are connected to the control panel. The control panel controls the operation of the feeding belt, left and right centering mechanism, front and back centering mechanism, and compression testing mechanism based on the detection signals of each positioning sensor.

[0011] Compared with existing technologies, the beneficial effects of this invention are as follows: It achieves automated collaborative operation and reduces reliance on manual labor: The feeding belt enables automated transport of the test material. Combined with the linkage control of the positioning sensor and control panel, it automatically completes the entire process of loading, centering, and compressive strength testing of the test block, eliminating the need for manual handling and positioning, significantly reducing labor intensity, avoiding errors caused by manual operation, and improving testing efficiency. The invention also features left-right and front-back centering mechanisms, employing a single motor driving the synchronous movement of the double-sided clamping plates. This ensures that the test block is accurately positioned to the test center in both left-right and front-back directions, avoiding uneven force distribution caused by test block misalignment. Furthermore, the cooperation between the lifting push block and the alignment groove further improves the alignment accuracy during lifting testing, ensuring that the test data accurately reflects the compressive strength of the concrete. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention.

[0014] Figure 2 This is a schematic diagram of the compression testing mechanism in this invention.

[0015] Figure 3 This is a schematic diagram of the fixture plate in this invention.

[0016] Figure 4 This is another structural schematic diagram of the fixture plate in this invention.

[0017] Figure 5 This is a schematic diagram of the positioning centering workstation in Embodiment 1 of the present invention.

[0018] Figure 6 This is another structural schematic diagram of the centered workstation in Embodiment 1 of the present invention.

[0019] Figure 7 This is a schematic diagram of the structure of Embodiment 2 of the present invention.

[0020] The components include: 1 test bench, 3 feeding belts, and 8 control panels. Compression testing mechanism 2: upper pressure plate 21, lifting hydraulic cylinder 22, test bracket 23, lifting adjustment screw 211, nut seat 231, lifting push block 221; Left and right centering mechanism 6: left and right centering bracket 61, left and right centering clamping block 62, first drive motor 63, first rotating rod 64, left and right centering guide rail 65, left and right centering slider 66, first movable rod 67; Front and rear centering mechanism 7: front and rear centering bracket 71, front and rear centering clamping block 72, second drive motor 73, second rotating rod 74, front and rear centering guide rail 75, front and rear centering slider 76, second movable rod 77, lifting and avoiding mechanism 78, lifting bracket 781, lifting hydraulic cylinder 782; Fixture plate 4: Fixture groove 41, guide slope 411, clearance cutout 412, clearance notch 413; Material plate 5: Positioning protrusion 51, alignment groove 52. Detailed Implementation

[0021] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided. Example 1

[0022] Please see Figures 1-5 A concrete compressive strength testing device includes a test bench 1, a compressive strength testing mechanism 2 mounted on the test bench 1, and a feeding belt 3. One end of the feeding belt 3 has a loading station, and the other end has a testing station. A fixture plate 4 is mounted on the feeding belt 3, and a material plate 5 for placing the material to be tested is mounted on the fixture plate 4. A positioning and centering station is located on the test bench 1 between the loading station and the testing station. The positioning and centering station includes a left-right centering mechanism 6 and a front-back centering mechanism 7. The compressive strength testing mechanism 2 includes components located at the testing station. The test bench 1 is equipped with an upper pressure plate 21, a lifting hydraulic cylinder 22, and a control panel 8 that controls the movement of the feeding belt 3, the left-right centering mechanism 6, the front-back centering mechanism 7, and the lifting hydraulic cylinder 22, and records the pressure borne by the material under test. The material plate 5, carrying the material to be tested, passes sequentially through the left-right centering mechanism 6 and the front-back centering mechanism 7 along with the fixture plate 4, performing left-right centering and front-back centering actions respectively, before entering the compressive strength testing mechanism 2. The lifting hydraulic cylinder 22 lifts the material plate 5 to cooperate with the upper pressure plate in testing the compressive strength of the material under test. Specifically, the pressure borne by the material under test can be obtained in the following two ways: (1) The control panel 8 reads the real-time output pressure of the lifting hydraulic cylinder 22. After the fixture plate 4 enters the test station, the lifting hydraulic cylinder 22 is raised. When the material plate 5 is lifted, the control panel 8 records the initial pressure of the lifting hydraulic cylinder 22 at this time as F0. The lifting hydraulic cylinder 22 continues to lift the material plate 5 at a constant speed, so that the material to be tested contacts the bottom surface of the upper pressure plate 21. The lifting hydraulic cylinder 22 continues to output pressure until the material to be tested is destroyed. The maximum pressure value during this process is recorded as F. maxTherefore, the actual maximum pressure that the material to be tested can withstand is F. 测 =F max - F0; (2) A pressure sensor connected to the control panel 8 is installed at the upper pressure plate 21. The pressure sensor monitors the pressure on the upper pressure plate 21 in real time. When the lifting hydraulic cylinder 22 lifts the material plate 5 to contact the bottom surface of the upper pressure plate 21, the lifting hydraulic cylinder 22 continues to output pressure until the material to be tested is destroyed. The maximum pressure value during this process is recorded as F. max Based on the interaction of forces, the actual maximum pressure that the material under test can withstand is F. 测 '=F max '.

[0023] In this embodiment, the compression testing mechanism 2 also includes a test bracket 23 fixed on the test bench 1. A nut seat 231 is fixed on the test bracket 23, and a lifting adjustment screw 211 that is threadedly engaged with the nut seat 231 is connected to the top surface of the upper pressure plate 21. By rotating the lifting adjustment screw 211, the height of the upper pressure plate 21 can be adjusted to accommodate different specifications of test materials.

[0024] In this embodiment, the jig plate 4 is provided with a jig groove 41, and the groove wall of the jig groove 41 is provided with a guide slope 411. The bottom of the material plate 5 is provided with a positioning protrusion 51 that matches the shape of the jig groove 41. The bottom of the jig groove 41 is also provided with a clearance cutout 412 corresponding to the lifting hydraulic cylinder 22. The guide slope 411 facilitates the quick insertion of the positioning protrusion 51 into the jig groove 41, realizing the initial positioning of the material plate 5 and the jig plate 4, and avoiding the material plate 5 from shifting during the feeding process.

[0025] In this embodiment, the telescopic rod of the lifting hydraulic cylinder 22 is set upward and fixedly connected to the lifting push block 221. The bottom of the material plate 5 is provided with an alignment groove 52 that matches the shape of the lifting push block 221, so as to ensure that the material plate 5 is accurately aligned during lifting.

[0026] In this embodiment, the jig slot 41 is provided with clearance notches 413 on both sides to facilitate loading or unloading of the material plate 5. Operators can quickly pick up or put down the material plate 5 through the clearance notches 413, improving operational convenience.

[0027] In this embodiment, the left and right centering mechanism 6 includes a left and right centering bracket 61 fixed on the test bench 1 and a pair of left and right centering clamps 62 respectively disposed on the left and right sides of the feeding belt 3. A first drive motor 63 and a first rotating rod 64 driven by the first drive motor 63 are centrally disposed on the left and right centering bracket 61. The center of the first rotating rod 64 is fixedly connected to the rotating shaft of the first drive motor 63. A set of left and right centering guide rails 65 perpendicular to the conveying direction of the feeding belt 3 are respectively disposed on the left and right sides of the left and right centering bracket 61. A left and right centering slider 66 is slidably connected to each set of left and right centering guide rails 65. A first movable rod 67 is hinged to both ends of the first rotating rod 64. The tail end of the first movable rod 67 is hinged to the corresponding left and right centering slider 66. Each left and right centering slider 66 is connected to a left and right centering clamp 62, and the two left and right centering clamps 62 are disposed opposite to each other.

[0028] When the feeding belt 3 drives the fixture plate 4 to the positioning centering position, the feeding belt 3 stops and the first drive motor 63 is started at the same time. The first drive motor 63 drives the first rotating rod 64 to rotate. The first rotating rod 64 drives the two left and right centering sliders 66 to move towards the center of the feeding belt 3 along the left and right centering guide rails 65 through the first movable rods 67 at both ends. This causes the left and right centering clamps 62 to clamp the material plate 5, realizing the left and right centering positioning of the material plate 5. After the positioning is completed, the first drive motor 63 reverses and drives the left and right centering clamps 62 to reset, and the feeding belt 3 continues to run.

[0029] In this embodiment, the front and rear centering mechanism 7 includes a front and rear centering bracket 71 mounted on the test bench 1 and a pair of front and rear centering clamps 72 respectively mounted on the front and rear sides of the feeding belt 3. A second drive motor 73 and a second rotating rod 74 driven by the second drive motor 73 are centrally mounted on the front and rear centering bracket 71. The center of the second rotating rod 74 is fixedly connected to the rotating shaft of the second drive motor 73. A set of front and rear centering guide rails 75 along the conveying direction of the feeding belt 3 are respectively mounted on the front and rear sides of the front and rear centering bracket 71. A front and rear centering slider 76 is slidably connected to each set of front and rear centering guide rails 75. A second movable rod 77 is hinged to both ends of the second rotating rod 74. The tail end of the second movable rod 77 is hinged to the corresponding front and rear centering slider 76. Each front and rear centering slider 76 is connected to a front and rear centering clamp 72, and the two centering clamps are arranged opposite to each other. The test bench 1 is also provided with a lifting and positioning mechanism 78 for driving the front and rear centering bracket 71 to rise and fall. Specifically, the lifting and positioning mechanism 78 includes a lifting bracket 781 fixed on the test bench 1 and a pair of lifting hydraulic cylinders 782 installed on the lifting bracket 781. The pair of lifting hydraulic cylinders 782 are respectively located on both sides of the front and rear centering brackets 71 and their telescopic rods are connected to the front and rear centering brackets 71.

[0030] Specifically, in this embodiment, the front and rear centering mechanism 7 is positioned above the left and right centering mechanism 6 and is driven to rise and fall by the lifting and avoiding mechanism 78. When the fixture plate 4 reaches the positioning centering position, the left and right centering mechanism 6 moves while the lifting and avoiding mechanism 78 descends, driving the front and rear centering bracket 71 to descend to the working position. Then, the second drive motor 73 is started, and the second drive motor 73 drives the second rotating rod 74 to rotate. The second rotating rod 74 drives the two front and rear centering sliders 76 to move synchronously towards the center of the feeding belt 3 along the front and rear centering guide rail 75 through the second movable rods 77 at both ends. This causes the front and rear centering clamping block 72 to clamp the material plate 5, thereby achieving the front and rear centering positioning of the material plate 5. After positioning is completed, the second drive motor 73 reverses, driving the front and rear centering clamping block 72 to reset, the lifting and avoiding mechanism 78 rises, driving the front and rear centering bracket 71 to reset, and the feeding belt 3 continues to run.

[0031] In this embodiment, positioning sensors connected to the control panel 8 are respectively installed on the feeding belt 3 at the loading station, the positioning and centering station, and the testing station. The control panel 8 controls the operation of the feeding belt 3, the left and right centering mechanism 6, the front and rear centering mechanism 7, and the compression testing mechanism 2 based on the detection signals from each positioning sensor. Specifically, the positioning sensors can be laser sensors or radar sensors installed at the corresponding positions of the loading station, the positioning and centering station, and the testing station to detect the positioning status of the fixture plate.

[0032] The working principle of this invention is as follows: Pre-treatment: Based on the height of the material to be tested, rotate the lifting adjustment screw 211 to adjust the upper pressure plate 21 to a suitable initial height; Loading: The operator places the material to be tested on the material plate 5, and through the guide slope 411 of the fixture groove 41, the positioning protrusion 51 of the material plate 5 is embedded into the fixture groove 41 of the fixture plate 4 to complete the loading. Automated conveying and centering: Control panel 8 controls the operation of feed belt 3, which drives fixture plate 4 to move towards the test station; when the positioning sensor detects that fixture plate 4 has reached the centering position, feed belt 3 stops, left and right centering mechanism 6 moves, completes the left and right centering of material plate 5 and then resets, at the same time the front and rear centering mechanism 7 descends and moves, completes the front and rear centering of material plate 5 and then resets, and feed belt 3 continues to run; Compression test: When the positioning sensor detects that the fixture plate 4 has reached the test station, the feeding belt 3 stops, the control panel 8 controls the lifting hydraulic cylinder 22 to start, the lifting push block 221 is embedded in the alignment groove 52 of the material plate 5, lifting the material plate 5 and the material to be tested together until the test block contacts the upper pressure plate 21; the lifting hydraulic cylinder 22 continues to apply pressure until the material to be tested is damaged, the maximum pressure value that the material to be tested can withstand is recorded, and the compression test is completed. Unloading: After the test is completed, the lifting hydraulic cylinder 22 is reset, the material plate 5 returns to the fixture plate 4, the feeding belt 3 reverses, and the fixture plate 4 is pulled out and returned to the loading station. The operator takes the material plate 5 out of the fixture plate 4 through the clearance notches 413 on both sides of the fixture slot 41, and the unloading is completed. After cleaning the residue on the material plate 5, a new material to be tested is placed and the next round of testing is carried out. Example 2

[0033] Please see Figure 6 In this embodiment, the left and right centering mechanism 6' and the front and back centering mechanism 7' are arranged sequentially along the feeding belt 3. The fixture plate 4 is conveyed along the feeding belt 3, passing sequentially through the left and right centering mechanism 6', the front and back centering mechanism 7', and the testing station. The material to be tested on the material plate 5 completes the left and right centering and front and back centering positioning in sequence, and then completes the compressive strength test at the testing station. Finally, the material is driven by the reverse rotation of the feeding belt 3 to exit the fixture plate 4 and return to the loading station. This method is suitable for materials with larger specifications.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A concrete compressive strength testing device, comprising a test bench, a compressive strength testing mechanism mounted on the test bench, and a feeding belt, characterized in that, One end of the feeding belt is equipped with a loading station, and the other end is equipped with a testing station. A fixture plate is installed on the feeding belt, and a material plate for placing the material to be tested is installed on the fixture plate. A positioning and centering station is set on the test bench between the loading station and the testing station. The positioning and centering station includes a left-right centering mechanism and a front-back centering mechanism. The compressive strength testing mechanism includes an upper pressure plate and a lifting hydraulic cylinder located at the testing station. The test bench is also equipped with a control panel that controls the movement of the feeding belt, the left-right centering mechanism, the front-back centering mechanism, and the lifting hydraulic cylinder, and records the pressure borne by the material to be tested. The material plate carrying the material to be tested passes through the left-right centering mechanism and the front-back centering mechanism in sequence with the fixture plate, and then enters the compressive strength testing mechanism after performing left-right centering and front-back centering movements respectively. The lifting hydraulic cylinder lifts the material plate to cooperate with the upper pressure plate to test the compressive strength of the material to be tested.

2. The concrete compressive strength testing device according to claim 1, characterized in that, The compression testing mechanism also includes a test bracket fixed to the test bench, a nut seat fixed on the test bracket, and a lifting adjustment screw that is threadedly engaged with the nut seat connected to the top surface of the upper pressure plate.

3. The concrete compressive strength testing device according to claim 1, characterized in that, The jig plate is provided with a jig groove, the groove wall is provided with a guide slope, the bottom of the material plate is provided with a positioning protrusion that matches the shape of the jig groove, and the bottom of the jig groove is also provided with a clearance cutout corresponding to the lifting hydraulic cylinder.

4. A concrete compressive strength testing device according to claim 1 or 3, characterized in that, The telescopic rod of the lifting hydraulic cylinder is set upward and fixedly connected to the lifting push block. The bottom of the material plate is provided with an alignment groove that matches the shape of the lifting push block.

5. The concrete compressive strength testing device according to claim 3, characterized in that, The jig slot has clearance notches on both sides to facilitate loading or unloading of material plates.

6. The concrete compressive strength testing device according to claim 1, characterized in that, The left-right centering mechanism includes a left-right centering bracket fixed on the test bench and a pair of left-right centering clamps respectively located on the left and right sides of the feeding belt. A first drive motor and a first rotating rod driven by the first drive motor are centrally located on the left-right centering bracket. The center of the first rotating rod is fixedly connected to the rotating shaft of the first drive motor. A set of left-right centering guide rails perpendicular to the conveying direction of the feeding belt are respectively provided on the left and right sides of the left-right centering bracket. A left-right centering slider is slidably connected to each set of left-right centering guide rails. A first movable rod is hinged to each end of the first rotating rod. The tail end of the first movable rod is hinged to the corresponding left-right centering slider. Each left-right centering slider is connected to a left-right centering clamp.

7. The concrete compressive strength testing device according to claim 1, characterized in that, The front and rear centering mechanism includes a front and rear centering bracket mounted on the test bench and a pair of front and rear centering clamps respectively located on the front and rear sides of the feeding belt. A second drive motor and a second rotating rod driven by the second drive motor are centrally mounted on the front and rear centering bracket. The center of the second rotating rod is fixedly connected to the rotating shaft of the second drive motor. A set of front and rear centering guide rails along the conveying direction of the feeding belt are respectively provided on the front and rear sides of the front and rear centering bracket. A front and rear centering slider is slidably connected on each set of front and rear centering guide rails. A second movable rod is hinged to both ends of the second rotating rod. The tail end of the second movable rod is hinged to the corresponding front and rear centering slider. Each front and rear centering slider is connected to a front and rear centering clamp. The test bench is also equipped with a lifting and positioning mechanism for driving the front and rear centering bracket to rise and fall.

8. The concrete compressive strength testing device according to claim 1, characterized in that, Positioning sensors connected to the control panel are installed at the feeding station, left and right centering mechanism, front and back centering mechanism and testing station on the feeding belt. The control panel controls the operation of the feeding belt, left and right centering mechanism and front and back centering mechanism based on the detection signals of each positioning sensor.

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