Pressure testing machine for concrete plate doped with concrete admixture

Abstract

The invention relates to the technical field of pressure testing equipment for concrete slabs, in particular to a pressure testing machine for a concrete slab doped with a concrete admixture. The device comprises a rack, a loading mechanism, a sample clamp, a flatness detection device, a grinding device and a measurement and control system. Wherein the loading mechanism drives a loading head to vertically move through a lifting source, the sample clamp is used for clamping a sample, the flatness detection device drives a first flatness detector through a two-dimensional moving assembly to detect the flatness of the surface of the sample, and the polishing device drives a polisher through a three-dimensional moving mechanism to polish the surface of the sample. The measurement and control system is used for collecting and recording test data and controlling actions of all parts. According to the invention, comprehensive and accurate pressure test and flatness detection on the concrete plate doped with the concrete admixture are realized, and the test efficiency and accuracy are improved.

Description

Technical Field

[0001] The present application relates to the technical field of new material performance testing, and in particular to a pressure testing machine for concrete slabs mixed with concrete admixtures. Background Art

[0002] Concrete admixtures are materials added during the concrete mixing process to improve various properties of concrete, such as fluidity, strength, durability, setting time, and freeze-thaw resistance. Common concrete admixtures include water reducers, retarders, early strength agents, antifreeze agents, and pumping agents. The application of these admixtures has significantly improved the quality and construction efficiency of concrete, and promoted the rapid development of the construction industry. In the field of building materials, the pressure testing machine is a commonly used equipment for determining the mechanical properties of materials under pressure. Specifically, it can evaluate the compressive strength of materials such as concrete, masonry, and cement, thereby ensuring the safety and reliability of building materials.

[0003] In practical applications, in order to test the mechanical properties of concrete slabs mixed with admixtures, a pressure testing machine is usually used to evaluate the effect of the admixtures.

[0004] However, in practical applications, the unevenness of the sample surface is common, which will lead to stress concentration during loading, thus seriously affecting the accuracy of the test results. Therefore, how to effectively solve the test error caused by the uneven sample surface has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] In order to improve the test accuracy, the present application provides a pressure testing machine for concrete slabs mixed with concrete admixtures.

[0006] The present application provides a pressure testing machine for a concrete slab mixed with a concrete admixture, which adopts the following technical solution, including: A frame, comprising a detection platform and a frame body fixed on the detection platform; A loading mechanism, disposed above the detection platform, comprises a lifting source and a loading head, wherein the lifting source is used to drive the loading head to move in a vertical direction; A sample clamp; disposed between the loading mechanism and the detection stage and close to the detection stage, for clamping the sample; A flatness detection device is arranged between the sample fixture and the loading mechanism, the flatness detection device comprises a two-dimensional moving component and a first flatness detector, the two-dimensional moving component is used to drive the first flatness detector to move two-dimensionally above the detection stage, and the first flatness detector is used to detect the flatness of the sample surface; A grinding device, arranged on the frame, comprises a three-dimensional moving mechanism and a grinder, wherein the three-dimensional moving mechanism is used to drive the grinder to move three-dimensionally, and the grinder is used to grind the surface of the sample; The measurement and control system includes a data acquisition module and a control module. The data acquisition module is used to collect and record test data. The control module is connected to the lifting source, the two-dimensional moving component and the three-dimensional moving mechanism by telecommunication.

[0007] By adopting the above technical solutions, the frame and the detection platform ensure the stability and reliability of the entire testing machine. The loading mechanism pressurizes the sample through the lifting source and the loading head to ensure the smooth and controllable loading process. The sample fixture can firmly clamp the sample to avoid displacement or loosening during the loading process, thereby ensuring the accuracy of the test results. The flatness detection device detects and records the unevenness of the sample surface in time by performing two-dimensional scanning on the sample surface, providing a basis for subsequent grinding. The grinding device can perform comprehensive and fine grinding on the sample surface through a three-dimensional moving mechanism and a grinder to eliminate the errors caused by surface unevenness. The measurement and control system realizes data acquisition and automatic control of the entire test process through the data acquisition module and the control module, thereby improving the efficiency and accuracy of the test.

[0008] Optionally, the sample clamp comprises a driving module and two clamping blocks arranged opposite to each other, and the driving module is used to drive the two clamping blocks to move relative to each other.

[0009] By adopting the above technical solution, the sample clamp includes a driving module and two clamping blocks arranged opposite to each other. The driving module can drive the two clamping blocks to move relative to each other, thereby achieving stable clamping of samples of different sizes and shapes, ensuring the stability and safety of the samples during the test, and improving the accuracy and reliability of the test results.

[0010] Optionally, the three-dimensional moving mechanism includes a mechanical arm, the mechanical arm includes a free end; the grinder includes a force-applying member and a grinding head connected to each other, the force-applying member is connected to the free end, and the force-applying member is used to drive the grinding head to rotate.

[0011] By adopting the above technical solution, the three-dimensional moving mechanism includes a mechanical arm, the free end of the mechanical arm is connected to a grinder, the grinder is composed of a force-applying member and a grinding head, the force-applying member is not only connected to the free end of the mechanical arm, but also can drive the grinding head to rotate. The grinding head can perform multi-angle and multi-directional grinding processing at different positions of the sample, thereby effectively eliminating the unevenness of the sample surface, ensuring uniform stress distribution during loading, and improving the accuracy and reliability of the test results.

[0012] Optionally, the free end is also connected to a dust collector head, and the dust collector head is connected to a negative pressure source.

[0013] By adopting the above technical solution, the dust suction head can effectively absorb the dust generated during the grinding process, reduce environmental pollution, and prevent dust from interfering with the detection accuracy of the flatness detection device, thereby improving the accuracy and reliability of the test.

[0014] Optionally, the two-dimensional moving assembly includes a transverse sliding unit and a longitudinal sliding unit, the transverse sliding unit includes a transverse guide rail and a first driving member, and the longitudinal sliding unit includes a longitudinal guide rail and a second driving member; The longitudinal guide rail is slidably connected to the transverse guide rail, and the first driving member is used to drive the longitudinal guide rail to slide; a bearing bracket is slidably connected to the longitudinal guide rail, and the second driving member is used to drive the bearing bracket to move, and the first flatness detector is connected to a side of the bearing bracket close to the detection platform.

[0015] By adopting the above technical solution, the combination of the transverse sliding unit and the longitudinal sliding unit enables the first flatness detector to achieve two-dimensional movement on the detection stage, so that the first flatness detector can perform a comprehensive detection of the surface area of ​​the sample.

[0016] Optionally, the loading head is detachably connected to the lifting source, and the flatness detection device also includes a second flatness detector, which is connected to a side of the supporting bracket away from the detection platform and is used to detect the flatness of the surface of the loading head.

[0017] By adopting the above technical solution, the loading head is detachably connected to the lifting source, and when the loading head is worn to a certain extent, the loading head can be replaced; the second flatness detector added to the flatness detection device can detect the flatness of the surface of the loading head, so that the wear of the loading head is within a predetermined range, ensuring that the loading head is in a better state before each use, and further improving the accuracy and reliability of the test.

[0018] Optionally, the lifting source includes a hydraulic cylinder, the hydraulic cylinder includes a telescopic rod, and an electromagnetic suction block is fixed to one end of the telescopic rod; the loading head includes a loading column and a connecting rod connected to one end of the loading column, and the connecting rod is made of ferromagnetic material.

[0019] By adopting the above technical solution, the hydraulic cylinder as the lifting source can provide stable vertical movement to ensure the smooth descent of the loading head, thereby ensuring the stability and accuracy of the loading process. The electromagnetic suction block fixed at one end of the telescopic rod is used in conjunction with the connecting rod of the loading head, so that the loading head can be quickly and easily installed and removed.

[0020] Optionally, the loading head housing is provided with a protective cover.

[0021] By adopting the above technical solution, the outer cover of the loading head is provided with a protective cover, which can effectively prevent the debris generated during the loading process from splashing and protect the safety of the operator.

[0022] Optionally, a sliding rod section is provided on the connecting rod, and a limiting abutment plate is provided on the sliding rod section, and the sliding rod section is passed through the protective cover; the limiting abutment plate is located inside the protective cover and is used to abut against the protective cover.

[0023] By adopting the above technical solution, the sliding rod section is passed through the protective cover to realize the sliding connection of the protective cover on the connecting rod; a limit abutment plate is provided on the sliding rod section, and when the protective cover descends with the loading head, the protective cover first abuts against the detection platform; then, when the loading column continues to move down until it abuts against the sample, the protective platform no longer moves, and the protective cover surrounds both the loading column and the sample, thereby improving the protection effect.

[0024] Optionally, an anti-slip pad is fixed on the side wall of the clamping block.

[0025] By adopting the above technical solution, the anti-slip pad is fixed on the side wall of the clamping block, which can increase the friction between the clamping block and the sample and prevent the sample from sliding during the clamping process, thereby improving the stability and reliability of the test process.

[0026] In summary, the present application includes at least one of the following beneficial effects: 1. The flatness detection device in this application detects the surface of the sample comprehensively, identifies and locates the uneven area, thereby ensuring the accuracy of the subsequent grinding process, effectively solving the stress concentration problem caused by the uneven surface of the sample, and improving the accuracy of the test results; 2. The polishing device in this application can perform comprehensive and detailed polishing on the surface of the sample through precise control of the three-dimensional moving mechanism, eliminate unevenness, further improve the flatness of the sample surface, and thus improve the reliability and consistency of the test results; 3. The data acquisition module and control module of the measurement and control system work together to achieve precise control of the loading mechanism, two-dimensional mobile components and three-dimensional mobile mechanism, ensuring the automation and intelligence of the entire test process, reducing the impact of human factors on the test results, and improving the efficiency and accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of a pressure testing machine for a concrete slab mixed with a concrete admixture according to an embodiment of the present application; Figure 2 It is a schematic diagram of the internal structure of the protective cover according to an embodiment of the present application; Figure 3 It is a partial structural schematic diagram showing a two-dimensional mobile component of the present application; Figure 4 yes Figure 2 A schematic diagram of the local enlarged structure at point A in the middle; Description of reference numerals: 1, frame; 11, detection platform; 12, frame; 13, mounting support; 2, loading mechanism; 21, hydraulic cylinder; 211, telescopic rod; 22, electromagnetic suction block; 23, loading head; 231, loading column; 232, connecting rod; 2321, slide bar section; 2322, limit stop plate; 3, sample fixture; 31, driving module; 32, clamping block; 33, connecting bracket; 4, flatness detection device; 41, lateral sliding unit; 411, lateral guide rail; 41 2. First driving member; 413. First screw rod; 42. Longitudinal sliding unit; 421. Longitudinal guide rail; 422. Second driving member; 423. Second screw rod; 43. First flatness detector; 44. Support bracket; 45. Second flatness detector; 5. Grinding device; 51. Robotic arm; 511. Free end; 5111. Support plate; 52. Grinding device; 521. Force applying member; 522. Grinding head; 53. Dust collector; 54. Negative pressure source; 6. Protective cover; 7. Anti-slip mat. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4 This application is described in further detail.

[0029] Reference Figure 1 and Figure 2 The embodiment of the present application provides a pressure testing machine for concrete panels mixed with concrete admixtures, including a frame 1, a measurement and control system, and a loading mechanism 2, a grinding device 5, a flatness detection device 4 and a sample fixture 3 arranged on the frame 1 from top to bottom. The machine eliminates the influence of the uneven surface of the sample on the test results through automated detection and flattening, and ensures the reliability and consistency of the test results.

[0030] Reference Figure 2 , the frame 1 includes a detection platform 11 and a frame 12 fixed on the detection platform 11. The detection platform 11 is used to place the sample, and the frame 12 supports the various components of the entire testing machine. The loading mechanism 2 includes a lifting source and a loading head 23. The lifting source is used to drive the loading head 23 to move in the vertical direction so as to apply pressure to the sample; the lifting source can be an electric cylinder, a cylinder, etc. In this embodiment, the loading source is specifically set as a hydraulic cylinder 21, and a detachable connection structure is added between the loading head 23 and the hydraulic cylinder 21; specifically, the hydraulic cylinder 21 includes a telescopic rod 211, and an electromagnetic suction block 22 is fixed at one end of the telescopic rod 211; the loading head 23 includes a connecting rod 232 and a loading column 231 fixed to one end of the connecting rod 232, and the connecting rod 232 is made of ferromagnetic material. The connecting rod 232 can cooperate with the electromagnetic suction block 22 to realize the detachable connection between the loading head 23 and the hydraulic cylinder 21, so as to quickly replace the loading head 23.

[0031] In other embodiments, the detachable connection structure between the loading head 23 and the hydraulic cylinder 21 may be in the form of a threaded connection or a quick-change joint.

[0032] Reference Figure 2 A protective cover 6 is provided on the outer cover of the loading head 23 to protect the loading head 23 from the influence of the external environment. The protective cover 6 can be made of a transparent material to facilitate observation of the loading process. The connecting rod 232 includes an integrally formed slide bar section 2321, which is penetrated through the top of the protective cover 6. The diameter of the slide bar section 2321 is slightly smaller than the aperture of the hole at the top of the protective cover 6 for the slide bar section 2321 to pass through, so as to ensure the free sliding of the protective cover 6 on the connecting rod 232. A limit stop plate 2322 is fixed on the slide bar section 2321.

[0033] In other embodiments, threads may be processed on the outside of the slide rod segment 2321 so that the connection between the limit plate 2322 and the slide rod segment 2321 becomes a threaded connection, which ensures a firm and reliable connection on the one hand and facilitates adjustment of the position of the limit plate 2322 according to actual needs on the other.

[0034] Reference Figure 2 and Figure 3 The flatness detection device 4 includes a two-dimensional moving component, a first flatness detector 43 and a second flatness detector 45. The two-dimensional moving component is composed of a transverse sliding unit 41 and a longitudinal sliding unit 42; the transverse sliding unit 41 includes a transverse guide rail 411 and a first driving member 412, two transverse guide rails 411 are arranged in parallel, the transverse guide rail 411 is fixedly connected to the frame 12, and one end of the transverse guide rail 411 extends outside the frame 12. The longitudinal sliding unit 42 includes a longitudinal guide rail 421 and a second driving member 422. The longitudinal guide rail 421 is arranged perpendicular to the transverse guide rail 411, and one end of the longitudinal guide rail 421 is slidably connected to one transverse guide rail 411, and the other end slides on the transverse guide rail 411 at the other end. In this embodiment, the first driving member 412 is specifically configured as a first motor, and a first motor is fixed to the end of each transverse guide rail 411; a first screw rod 413 is rotatably connected to each transverse guide rail 411; the first screw rod 413 is passed through and threadedly connected to the end of the longitudinal guide rail 421, and the first screw rod 413 transmits the power of the first motor to the transverse guide rail 411. Starting the first motor can drive the transverse guide rail 411 to slide along the longitudinal guide rail 421.

[0035] Reference Figure 3, a bearing bracket 44 is slidably connected to the longitudinal guide rail 421. In this embodiment, the second driving member 422 is specifically configured as a second motor. A second screw rod 423 is rotatably connected to the longitudinal guide rail 421. The second screw rod 423 is penetrated and threadedly connected to the bearing bracket 44. The second screw rod 423 transmits the power of the second motor to the transverse guide rail 411. Starting the second motor can drive the bearing bracket 44 to slide along the transverse guide rail 411. The first flatness detector 43 is fixed to the side of the bearing bracket 44 close to the detection platform 11, and the second flatness detector 45 is fixed to the side of the bearing bracket 44 away from the detection platform 11. Through the setting of the two-dimensional moving component, the first flatness detector 43 and the second first flatness detector 43 are realized. Two-dimensional movement above the detection platform 11.

[0036] Reference Figure 2 and Figure 3 The first flatness detector 43 detects and records the unevenness of the sample surface in a timely manner by performing a two-dimensional scanning detection on the sample surface, providing a basis for subsequent grinding processing. The second flatness detector 45 is used to detect the flatness of the lower surface of the loading column 231 in the loading head 23, so as to facilitate the timely replacement of the loading head 23 that exceeds the wear range, thereby improving the accuracy of the test. The first flatness detector 43 and the second flatness detector 45 can be in the form of a laser rangefinder or a contact probe. In this embodiment, the first flatness detector 43 and the second flatness detector 45 are both laser rangefinders.

[0037] Reference Figure 2 and Figure 4 , the grinding device 5 includes a three-dimensional moving mechanism and a grinder 52. The three-dimensional moving mechanism specifically adopts a mechanical arm 51, and a mounting support 13 is fixed to one side of the frame 12 by screws, and one end of the mechanical arm 51 is mounted on the support 13. The mechanical arm 51 includes a free end 511, and a support plate 5111 is fixedly connected to the free end 511; the grinder 52 includes a force-applying member 521 and a grinding head 522 that are connected to each other, the force-applying member 521 is fixed on the support plate 5111, and the force-applying member 521 is used to drive the grinding head 522 to rotate, so that the grinding head 522 is used to grind the surface of the sample. In this embodiment, the force-applying member 521 is specifically configured as a servo motor.

[0038] In addition, a dust suction head 53 is connected to the support plate 5111, and the dust suction head 53 is located on one side of the grinding head 522. The dust suction head 53 is connected to a negative pressure source 54 through a hose to collect dust generated during the grinding process to keep the working environment clean. In this embodiment, the negative pressure source 54 is specifically configured as a negative pressure pump.

[0039] Reference Figure 2, the sample fixture 3 includes a driving module 31 and two clamping blocks 32 arranged opposite to each other; anti-skid pads 7 are fixed on the opposite side walls of the two clamping blocks 32 to increase friction, increase the stability of sample clamping, and prevent the sample from sliding during the test. The anti-skid pad 7 can be made of rubber or polyurethane material, which has good elasticity and durability. In the present embodiment, two driving modules 31 are also provided, and the driving modules 31 and the clamping blocks 32 are arranged one by one. In the present embodiment, the driving module 31 is specifically configured as a linear slide module driven by a motor screw, and a connecting bracket 33 is fixed on the slide in the driving module 31, and the connecting bracket 33 is fixedly connected to the corresponding clamping block 32. By starting the two driving modules 31 at the same time, the two clamping blocks 32 can be driven to move relative to each other to achieve the clamping and loosening of the sample. When the protective cover 6 descends to cover the sample, it can also cover the two driving modules 31 at the same time.

[0040] The measurement and control system (not shown in the figure) includes a data acquisition module and a control module. The data acquisition module is used to collect and record test data. The control module is connected to the hydraulic cylinder 21, the first motor, the second motor, the mechanical arm 51 and the drive module 31. The data acquisition module can integrate a variety of sensors, such as pressure sensors, displacement sensors, etc., to monitor various parameters in the loading process in real time. The control module is responsible for coordinating the actions of various components to ensure the smooth progress of the entire test process.

[0041] The implementation principle of a pressure testing machine for concrete panels mixed with concrete admixtures in an embodiment of the present application is: through automated detection and flattening, the influence of the uneven surface of the sample on the test results is eliminated. The flatness detection device 4 can perform a comprehensive scan of the sample surface before testing to detect uneven areas; the grinding device 5 then grinds the uneven areas on the upper surface of the sample to make the sample surface reach the required flatness. In this way, when the loading mechanism 2 applies pressure, the stress distribution is more uniform, avoiding test errors caused by local stress concentration. In addition, the introduction of the measurement and control system makes the entire test process more accurate and controllable, and improves the repeatability and reliability of the test.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pressure testing machine for concrete slabs mixed with concrete admixtures, characterized in that: include: A frame (1) comprising a detection platform (11) and a frame body (12) fixed on the detection platform (11); A loading mechanism (2) is arranged above the detection platform (11), comprising a lifting source and a loading head (23), wherein the lifting source is used to drive the loading head (23) to move in a vertical direction; A sample clamp (3); arranged between the loading mechanism (2) and the detection platform (11), and arranged close to the detection platform (11), and used for clamping the sample; A flatness detection device (4) is arranged between the sample fixture (3) and the loading mechanism (2), the flatness detection device (4) comprising a two-dimensional moving component and a first flatness detector (43), the two-dimensional moving component is used to drive the first flatness detector (43) to move two-dimensionally above the detection platform (11), and the first flatness detector (43) is used to detect the flatness of the sample surface; A grinding device (5) is arranged on the frame (1), comprising a three-dimensional moving mechanism and a grinder (52), wherein the three-dimensional moving mechanism is used to drive the grinder (52) to move three-dimensionally, and the grinder (52) is used to grind the surface of the sample; The measurement and control system includes a data acquisition module and a control module. The data acquisition module is used to collect and record test data. The control module is connected to the lifting source, the two-dimensional moving component and the three-dimensional moving mechanism by telecommunication.

2. A pressure testing machine for concrete slabs mixed with concrete admixtures according to claim 1, characterized in that: The sample clamp (3) comprises a driving module (31) and two clamping blocks (32) arranged opposite to each other, wherein the driving module (31) is used to drive the two clamping blocks (32) to move relative to each other.

3. A pressure testing machine for concrete slabs mixed with concrete admixtures according to claim 2, characterized in that: The three-dimensional moving mechanism comprises a mechanical arm (51), and the mechanical arm (51) comprises a free end (511); The grinder (52) comprises a force-applying member (521) and a grinding head (522) which are connected to each other, the force-applying member (521) being connected to the free end (511), and the force-applying member (521) being used to drive the grinding head (522) to rotate.

4. A pressure testing machine for concrete slabs mixed with concrete admixtures according to claim 3, characterized in that: The free end (511) is also connected to a dust collector head (53), and the dust collector head (53) is connected to a negative pressure source (54).

5. A pressure testing machine for concrete slabs mixed with concrete admixtures according to claim 1, characterized in that: The two-dimensional moving assembly comprises a transverse sliding unit (41) and a longitudinal sliding unit (42); the transverse sliding unit (41) comprises a transverse guide rail (411) and a first driving member (412); and the longitudinal sliding unit (42) comprises a longitudinal guide rail (421) and a second driving member (422); The longitudinal guide rail (421) is slidably connected to the transverse guide rail (411), and the first driving member (412) is used to drive the longitudinal guide rail (421) to slide; a bearing bracket (44) is slidably connected to the longitudinal guide rail (421), and the second driving member (422) is used to drive the bearing bracket (44) to move, and the first flatness detector (43) is connected to a side of the bearing bracket (44) close to the detection platform (11).

6. A pressure testing machine for concrete slabs mixed with concrete admixtures according to claim 5, characterized in that: The loading head (23) is detachably connected to the lifting source, and the flatness detection device (4) further comprises a second flatness detector (45), which is connected to a side of the supporting bracket (44) away from the detection platform (11) and is used to detect the flatness of the surface of the loading head (23).

7. A pressure testing machine for concrete slabs mixed with concrete admixtures according to claim 6, characterized in that: The lifting source comprises a hydraulic cylinder (21), the hydraulic cylinder (21) comprises a telescopic rod (211), and an electromagnetic suction block (22) is fixed to one end of the telescopic rod (211); The loading head (23) comprises a loading column (231) and a connecting rod (232) connected to one end of the loading column (231), wherein the connecting rod (232) is made of a ferromagnetic material.

8. A pressure testing machine for concrete slabs mixed with concrete admixtures according to claim 7, characterized in that: The outer cover of the loading head (23) is provided with a protective cover (6).

9. A pressure testing machine for concrete slabs mixed with concrete admixtures according to claim 8, characterized in that: The connecting rod (232) is provided with a sliding rod section (2321), the sliding rod section (2321) is provided with a limiting stop plate (2322), and the sliding rod section (2321) is passed through the protective cover (6); The limiting abutment plate (2322) is located inside the protective cover (6) and is used to abut against the protective cover (6).

10. A pressure testing machine for concrete slabs mixed with concrete admixtures according to claim 2, characterized in that: An anti-slip pad (7) is fixed on the side wall of the clamping block (32).

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