CN-224231773-U - Early crack test device of concrete

CN224231773UCN 224231773 UCN224231773 UCN 224231773UCN-224231773-U

Abstract

The utility model relates to the technical field of auxiliary devices of building test detectors and discloses a concrete early-stage crack resistance test device which comprises a second platform, wherein a wind collecting mechanism comprises a wind collecting cover, the outer part of the wind collecting cover is fixedly connected to the top of the second platform, a wind guiding cover is fixedly connected to the outer part of the wind collecting cover, namely, one side far away from the fourth platform, a wind shield is fixedly connected to the outer part of the wind guiding cover, namely, one side far away from the outer part of the wind collecting cover, a screw rod is fixedly connected to the top of a driving mechanism, and a concrete test block mould is fixedly connected to the inner part of the wind collecting cover. According to the utility model, the precision and reliability of the early-stage concrete crack resistance test are obviously improved, the accuracy and repeatability of the test result are ensured, meanwhile, the error risk caused by manual operation is reduced, the test efficiency is improved, the manpower resource cost is saved, and the safety and comfort of the test process are improved.

Inventors

WEI ZHONGYANG
WANG BAOPING
CHEN XUEDONG
ZHANG WENQIANG
WANG YUHANG
ZHAO KUNPENG
YANG LONGJUN
PANG SEN
WEI WENZHU

Assignees

北京中建建筑科学研究院有限公司
北京市建设工程质量第六检测所有限公司
中国建筑一局(集团)有限公司
河北雄安科铖检验认证有限公司

Dates

Publication Date: 20260512
Application Date: 20250408

Claims (8)

1. The early concrete crack resistance test device comprises a second platform (1) and is characterized in that a lifting mechanism (3) is arranged at the bottom of the second platform (1), a wind collecting mechanism (2) is arranged at the top of the second platform (1), a third platform (6) is connected to one side of the outer part of the second platform (1) in a sliding manner, a fourth platform (5) is connected to the top of the third platform (6) in a sliding manner, and a driving mechanism (4) is arranged at the top of the fourth platform (5); The wind collecting mechanism (2) comprises a wind collecting cover (24), the outside of the wind collecting cover (24) is fixedly connected with the top of the second platform (1), the outside of the wind collecting cover (24) is far away from one side of the fourth platform (5) and is fixedly connected with a wind guiding cover (22), the outside of the wind guiding cover (22) is far away from one side of the outside of the wind collecting cover (24) and is fixedly connected with a wind shield (23), the bottom of the third platform (6) is fixedly connected with an adjusting component used for adjusting, the top of the driving mechanism (4) is fixedly connected with a lead screw (211), the top of the lead screw (211) is fixedly connected with a strip-shaped airflow doubling device (212), one side of the outside of the wind collecting cover (24) is fixedly connected with two second sliding grooves (29), two inside sliding connections of the second sliding grooves (29) are provided with wind shield sliding blocks (28), and the inside of the wind collecting cover (24) is fixedly connected with concrete block modules (210).
2. The early crack resistance test device for concrete according to claim 1, wherein the driving mechanism (4) comprises a driving motor (41), the driving motor (41) is fixedly connected to the outer part of the fourth platform (5), namely, the outer side far away from the wind collecting cover (24), the top of the fourth platform (5) is fixedly connected with a plurality of sliding rails (42), and the outer side of the sliding rails (42) is fixedly connected to the output end of the driving motor (41).
3. The early concrete crack resistance test device according to claim 1, wherein the adjusting component comprises a bracket (25), the bottom of the bracket (25) is fixedly connected with the bottom of the third platform (6), the top of the bracket (25) is fixedly connected with a second hydraulic cylinder (26), the top of the wind collecting cover (24) is fixedly connected with a handle (21), and the top of the third platform (6) is fixedly connected with a plurality of first sliding grooves (27).
4. The early crack resistance test device for concrete according to claim 3, wherein the second hydraulic cylinder (26) is fixedly connected to the bottom of the fourth platform (5), and the fourth platform (5) can be driven to ascend through the second hydraulic cylinder (26) so as to adjust the height of the elongated airflow doubling device (212).
5. The early crack resistance test device for concrete according to claim 2, wherein the elongated airflow multiplier (212) is matched with the sliding rail (42) to enable the driving motor (41) to drive the screw rod (211) to rotate, so that the elongated airflow multiplier (212) is subjected to position adjustment.
6. The early concrete crack resistance test device according to claim 1, wherein the lifting mechanism (3) comprises a plurality of first hydraulic cylinders (33), the output ends of the first hydraulic cylinders (33) are fixedly connected to the periphery of the bottom of the second platform (1), and the bottoms of the first hydraulic cylinders (33) are fixedly connected with the first platform (31).
7. The early crack test device for concrete, as set forth in claim 6, wherein the first platform (31) is disposed at the bottom of the second platform (1), and a traveling wheel (32) is fixedly connected to the bottom of the first platform (31).
8. The early crack resistance test device for concrete according to claim 7, wherein the first hydraulic cylinders (33) can drive the second platform (1) to adjust the height when being extended and contracted.

Description

Early crack test device of concrete Technical Field The utility model relates to the technical field of auxiliary devices of building test detectors, in particular to a concrete early-stage crack resistance test device. Background An early-stage cracking test device for concrete is a device for testing early-stage cracking performance of a concrete test piece under a constraint condition. The method evaluates the cracking resistance of the concrete by simulating the constraint and environmental conditions of the concrete in the actual engineering, and provides important basis for the research and development of concrete materials, quality control and engineering application, thereby optimizing the concrete mixing ratio and improving the durability and safety of the concrete structure. According to the device, the aim of gradually increasing the pressure of the concrete cracking resistance test can be achieved, the pressure gradually increasing speed in each test process can be guaranteed to be equal, meanwhile, manual adjustment of workers is not needed, the early cracking resistance test of the concrete is facilitated, the efficiency of the early cracking resistance test of the concrete is improved, the device is provided with a positioning mechanism, a connecting pad on the outer side of the mounting plate can drive one side of the anti-skid plate to be attached to the outer side of a corresponding concrete block, the aim of auxiliary positioning is achieved, the concrete block placement position is guaranteed to be accurate, and the early cracking resistance test of the concrete is facilitated. In actual use, the device is arranged, the connecting pad on the outer side of the mounting plate can drive one side of the antiskid plate to be attached to the outer side of the corresponding concrete block, the concrete block placement position is ensured to be accurate, but the wind speed is taken as an important factor affecting the water evaporation rate and the development of the shrinkage stress of the concrete surface, and the consistency has a key effect on the accuracy and the comparability of test results. However, some existing test devices fail to provide stable and uniform wind speed conditions, so that wind speeds received by different positions of the surface of a test piece are inconsistent, thereby affecting the formation and development rules of cracks, reducing the reliability of test results, and an asphalt pavement maintenance paver is provided for solving the problems, and a concrete early crack resistance test device is provided for solving the problems. Disclosure of utility model In order to make up for the defects, the utility model provides an early-stage concrete crack resistance test device, and aims to solve the problem that part of devices in the prior art cannot improve test precision and wind speed to be consistent. In order to achieve the above purpose, the present utility model adopts the following technical scheme: the early concrete crack resistance test device comprises a second platform, wherein a lifting mechanism is arranged at the bottom of the second platform, a wind collecting mechanism is arranged at the top of the second platform, a third platform is connected to one side of the outer part of the second platform in a sliding manner, a fourth platform is connected to the top of the third platform in a sliding manner, and a driving mechanism is arranged at the top of the fourth platform; The wind collecting mechanism comprises a wind collecting cover, the outside of the wind collecting cover is fixedly connected to the top of the second platform, one side, away from the fourth platform, of the wind collecting cover is fixedly connected with a wind guiding cover, one side, away from the outside of the wind collecting cover, of the wind guiding cover is fixedly connected with a wind shield, the bottom of the third platform is fixedly connected with an adjusting component used for adjusting, the top of the driving mechanism is fixedly connected with a screw rod, the top of the screw rod is fixedly connected with a strip-shaped airflow doubling device, one side of the outside of the wind collecting cover is fixedly connected with two second sliding grooves, the inside of the two second sliding grooves is slidingly connected with a wind cover sliding block, and the inside of the wind collecting cover is fixedly connected with a concrete test block die; According to the technical scheme, the second platform and the third platform are located on the same plane and are fixedly connected or integrally formed, the fourth platform is arranged above the third platform, the first sliding groove is formed in the third platform, and the fourth platform is arranged in the first sliding groove in a sliding mode through the sliding block. The long-strip-shaped airflow doubling device is arranged on a fourth platform, a sliding rail is arranged on the fourth platform, the long-strip-shape