A device for detecting the strength of a concrete block
The automatic centering and clamping of concrete test blocks is achieved through a turntable, worm gear mechanism and slider pusher plate structure, which solves the problem of uneven stress caused by the skewed placement of concrete test blocks, improves the accuracy and efficiency of concrete strength testing, and adapts to the needs of samples with different shapes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANXI BLUE STAR ZHONGJIN CONSTRUCTION ENGINEERING CO LTD
- Filing Date
- 2025-06-17
- Publication Date
- 2026-06-16
Smart Images
Figure CN224365886U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of concrete strength testing, and in particular relates to a concrete block strength testing device. Background Technology
[0002] Concrete strength testing devices are widely used in the quality control, acceptance, and safety assessment of concrete in construction, bridge, and road projects. Before actual pouring, pressure testing devices are used to test concrete samples after 7 days and 28 days to determine if the concrete strength meets design requirements and to verify the mix proportions. However, when testing the strength of concrete samples using pressure testing devices, it is easy for the concrete samples to be placed at an angle. It is difficult for workers to manually align the center of the concrete sample with the center of the pressure plate of the testing device, resulting in uneven stress distribution under pressure. This causes the pressure load to be biased to one side, generating bending stress within the concrete sample and localized stress concentration, leading to cracking in the stress concentration areas, exhibiting diagonal cracks. This non-standard failure mode results in the measured failure load being lower than the true value, rendering the test data invalid and affecting the project progress. Utility Model Content
[0003] The purpose of this invention is to provide a concrete block strength testing device to solve the problem that when testing the strength of concrete sample blocks using a pressure testing device, the concrete sample blocks are often placed in a skewed position. This makes it difficult for workers to manually align the center of the concrete sample block with the center of the pressure plate of the pressure testing device, resulting in uneven stress distribution when the concrete sample block is under pressure. This causes the pressure load to be biased to one side, generating bending stress inside the concrete sample block. Stress concentration in local areas leads to cracking of the concrete sample block in the stress concentration area, presenting as diagonal cracks. Non-standard failure modes result in the measured failure load being lower than the true value, leading to invalid test data and affecting the progress of the project.
[0004] To achieve the above objectives, the specific technical solution of this utility model for a concrete block strength testing device is as follows:
[0005] A concrete block strength testing device includes a base; multiple guide support columns are arranged on the upper side of the base; an installation platform is arranged at the top of the multiple guide support columns; a hydraulic cylinder with its cylinder head facing downward is arranged on the upper side of the installation platform; a pressure plate is slidably connected to the multiple guide support columns; the hydraulic cylinder slides downward through the installation platform and is fixedly connected to the pressure plate; a fixed seat is arranged on the upper side of the base opposite to the pressure plate; four grooves are equidistantly arranged on the upper side of the fixed seat; a slider is slidably arranged in the grooves; a turntable is rotatably arranged in the fixed seat; an inclined groove is arranged on the turntable relative to the groove; a push block is slidably arranged at the bottom of the slider in the inclined groove; a worm gear is fixedly arranged on the lower side of the turntable; a worm is rotatably arranged on the fixed seat on one side of the worm gear; the worm gear and the worm are meshed; a motor is arranged on one side of the base to drive the worm to rotate; a push plate is fixedly arranged on the upper side of the slider.
[0006] Furthermore, a pressure sensor is installed at the connection point between the pressure plate and the hydraulic cylinder head.
[0007] Furthermore, the push plate can be selected as a flat plate or an arc-shaped plate according to usage requirements.
[0008] This utility model provides a concrete block strength testing device with the following advantages: A turntable and worm gear are rotatably mounted within a fixed base. After a concrete sample block is placed on the fixed base, the motor is started. The motor and worm gear drive the worm gear to rotate the turntable within the fixed base. Simultaneously, the turntable rotates, pushing push blocks slidably within multiple inclined grooves. These push blocks cause sliders to slide within the grooves, causing the sliders in the four grooves on the fixed base to move synchronously, bringing the push plates on them together or apart. When the position of the concrete sample block needs adjustment, the four push plates are brought closer to the center of the concrete sample block. Through the synchronous movement of multiple push plates, the concrete sample block is finally clamped in the center position, aligning the concrete sample block with the center of the pressure plate. In contrast, the subsequent pressing of the cylinder head by the hydraulic rod drives the pressure plate to slide and press down on multiple guide support columns to test the strength of the concrete specimen. The operation is simple and convenient, which can significantly improve the accuracy and efficiency of the test and completely eliminate a series of problems such as result errors and high rejection rate caused by manual placement errors. In concrete strength and pressure testing, the standard shape of concrete samples in my country is mainly cubic. In this case, a flat push plate is set on the slider to adjust the position of the concrete specimen. When the international standard cylindrical concrete sample is selected for strength testing, the push plate on the slider is replaced with an arc plate, which makes it easier for the arc plate to fit the cylindrical sample and push it to move and center, thus having a wider range of applications. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0010] Figure 2 This is a cross-sectional structural diagram of the present invention;
[0011] Figure 3 This utility model Figure 2 Enlarged view of region A in the middle;
[0012] Figure 4 This is a schematic diagram of the arc-shaped push plate installation structure of this utility model;
[0013] The markings in the diagram are as follows: 1. Base; 2. Guide support column; 3. Mounting platform; 4. Hydraulic cylinder; 5. Pressure plate; 6. Fixed seat; 7. Slide groove; 8. Slider; 9. Turntable; 10. Inclined groove; 11. Push block; 12. Worm gear; 13. Worm; 14. Motor; 15. Push plate; 16. Pressure sensor. Detailed Implementation
[0014] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a concrete block strength testing device.
[0015] like Figure 1-4 As shown, this utility model discloses a concrete block strength testing device, including a base 1; multiple guide support columns 2 are arranged on the upper side of the base 1; an installation platform 3 is arranged at the top of the multiple guide support columns 2; a hydraulic cylinder 4 with its cylinder head facing downward is arranged on the upper side of the installation platform 3; a pressure plate 5 is slidably connected to the multiple guide support columns 2; the cylinder head of the hydraulic cylinder 4 slides downward through the installation platform 3 and is fixedly connected to the pressure plate 5; a fixing seat 6 is arranged on the upper side of the base 1 at a position opposite to the pressure plate 5; four equidistant circumferentially arranged on the upper side of the fixing seat 6. A sliding groove 7; a slider 8 is slidably disposed within the sliding groove 7; a turntable 9 is rotatably disposed within the fixed base 6; an inclined groove 10 is disposed on the turntable 9 at an angle relative to the sliding groove 7; a push block 11 is slidably disposed at the bottom of the slider 8 within the inclined groove 10; a worm gear 12 is fixedly disposed on the lower side of the turntable 9; a worm 13 is rotatably disposed on one side of the fixed base 6 with the worm gear 12; the worm gear 12 and the worm 13 are meshed together; a motor 14 is disposed on one side of the base 1 to drive the worm 13 to rotate; a push plate 15 is fixedly disposed on the upper side of the slider 8.
[0016] Combination Figure 1-4As shown, during use, the concrete sample block to be tested is placed on the fixed seat 6 on the upper side of the base 1, so that the concrete sample block is positioned between multiple push plates 15. The motor 14 is started, and the motor 14 and the worm gear 13 drive the worm wheel 12 to drive the turntable 9 to rotate within the fixed seat 6. As the turntable 9 rotates, it pushes the push blocks 11 that are slidably set in the inclined grooves 10 through multiple inclined grooves 10. The push blocks 11 drive the sliders 8 to slide in the sliding grooves 7, so that the sliders 8 in the four sliding grooves 7 set on the fixed seat 6 drive the push plates 15 set on them to move synchronously and close together. Alternatively, the concrete test block can be spread out. When the position of the concrete test block needs to be adjusted, the four push plates 15 are brought together towards the central concrete test block. Through the synchronous movement of multiple push plates 15, the concrete test block is finally clamped in the center position, so that the concrete test block is aligned with the center of the pressure plate 5. Subsequently, the hydraulic rod presses down the cylinder head, driving the pressure plate 5 to slide and press down on multiple guide support columns 2 to perform strength testing on the concrete test block. The operation process is simple and convenient, which can significantly improve the accuracy and efficiency of testing, and completely eliminate a series of problems such as result errors and high rejection rate caused by manual placement errors.
[0017] A pressure sensor 16 is installed at the connection position between the pressure plate 5 and the cylinder head of the hydraulic cylinder 4. The pressure plate 5 slides on multiple guide support columns 2 as the hydraulic cylinder 4 presses down, and then the pressure plate 5 presses onto the concrete sample block set on the fixed seat 6. At this time, the sensor installed at the connection position between the pressure plate 5 and the cylinder head of the hydraulic cylinder 4 detects the pressure of the hydraulic cylinder 4, detects and records the pressure load borne by the concrete sample block until the test is completed.
[0018] Furthermore, the push plate 15 can be selected as a flat plate or an arc-shaped plate according to the usage requirements. In concrete strength and pressure testing, the standard concrete sample shape in my country is mainly cubic. At this time, a flat push plate 15 is set on the slider 8 to adjust the position of the concrete sample block. When a cylindrical concrete sample of the international standard style is selected for strength testing, the push plate 15 set on the slider 8 is replaced with an arc-shaped plate, which makes it easier for the arc-shaped plate to fit the cylindrical sample and push it to move and align, thus having a wider range of applications.
[0019] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.
Claims
1. A concrete block strength testing device, characterized in that, Includes a base (1); multiple guide support columns (2) are provided on the upper side of the base (1); an installation platform (3) is provided at the top of the multiple guide support columns (2); a hydraulic cylinder (4) with its cylinder head facing downwards is provided on the upper side of the installation platform (3); a pressure plate (5) is slidably connected to the multiple guide support columns (2); the cylinder head of the hydraulic cylinder (4) slides downwards through the installation platform (3) and is fixedly connected to the pressure plate (5); a fixed seat (6) is provided on the upper side of the base (1) at a position opposite to the pressure plate (5); four sliding grooves (7) are equidistantly provided on the upper side of the fixed seat (6); sliding grooves (7) are slidably arranged in the grooves (7). There is a slider (8); a turntable (9) is rotatably arranged inside the fixed base (6); an inclined groove (10) is provided on the turntable (9) at an angle relative to the slide groove (7); a push block (11) is slidably arranged at the bottom of the slider (8) in the inclined groove (10); a worm wheel (12) is fixedly arranged on the lower side of the turntable (9); a worm (13) is rotatably arranged on the side of the fixed base (6) on the worm wheel (12); the worm wheel (12) and the worm (13) are meshed; a motor (14) is provided on one side of the base (1) to drive the worm (13) to rotate; a push plate (15) is fixedly arranged on the upper side of the slider (8).
2. The concrete block strength testing device according to claim 1, characterized in that, A pressure sensor (16) is provided at the connection position between the pressure plate (5) and the cylinder head of the hydraulic cylinder (4).
3. The concrete block strength testing device according to claim 1, characterized in that, The push plate (15) can be selected as a flat plate or an arc plate according to the usage requirements.