A concrete performance tester

Abstract

The utility model discloses a concrete performance tester, which belongs to the technical field of concrete strength testing. It solves the problem that the rebound tester relies on measuring the rebound ability of the concrete surface to an impact element (such as a steel ball) to evaluate its hardness or compression strength. If the surface is uneven, it may cause uneven distribution of impact force, thereby affecting the measurement accuracy of the rebound height and causing inaccurate test values. It includes a spring rod, one end of which is provided with a plurality of outer ring grooves, and an outer support rod is slidably connected in the outer ring groove. The utility model drives the outer support rod and the inner support rod to extend through springs one and two to adapt to the pits or notches on the concrete wall. By adjusting the hexagon socket bolt one and the hexagon socket bolt two, the positions of the outer support rod and the inner support rod in the outer ring groove and the inner ring groove can be positioned, and then the wall strength can be closely attached to and measured with the spring rod. This design ensures that sufficient contact area can be used for accurate strength measurement even in uneven wall surfaces.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete strength testing, in particular to a concrete performance testing instrument. Background Art

[0002] The concrete performance measuring instrument is actually a concrete strength testing instrument, which is actually a rebound tester. The rebound tester is a non-destructive testing tool for measuring the hardness of concrete. It is widely used in the fields of construction and civil engineering, especially in evaluating the concrete strength of existing structures. It is based on a simple principle: an elastic steel hammer hits the concrete surface under the action of a spring and then rebounds back. The degree of rebound of the hammer (rebound value) is used as an indicator to evaluate the compressive strength of concrete. The relationship between this rebound value and the strength of concrete is determined through a large number of experiments and statistical analysis. When using a rebound tester for measurement, there is no need to damage the structure, so it is very suitable for rapid on-site assessment of the strength of the structure or to assist other detailed detection methods.

[0003] The flatness and cleanliness of the concrete surface have an important impact on the rebound test results, because the rebound hammer relies on measuring the rebound ability of the concrete surface against an impact element (such as a steel ball) to evaluate its hardness or compressive strength. If the surface is uneven, it may cause uneven distribution of impact force, thus affecting the measurement accuracy of the rebound height and resulting in inaccurate test values.

[0004] Therefore, a concrete performance tester is proposed to solve or alleviate the above problems. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a concrete performance tester.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A concrete performance tester comprises a spring rod, one end of which is provided with a plurality of outer ring grooves, an outer support rod is slidably connected in the outer ring groove, the length of the outer support rod is the same as the groove depth of the outer ring groove, and the outer support rod can be positioned and arranged in the groove depth direction of the outer ring groove.

[0008] Preferably, a recessed groove is provided on the outer peripheral wall of the impact rod, a threaded hole connected to the outer ring groove is provided at the bottom of the recessed groove, the threaded hole is internally threaded with a hexagon socket bolt that contacts the side wall of the outer support rod, and the screw head of the hexagon socket bolt is immersed in the recessed groove.

[0009] Preferably, the plurality of outer ring grooves are distributed in a circular array with the central axis of the impact rod as the center.

[0010] Preferably, an elastic member 1 is provided between the groove bottom of the outer ring groove and the outer support rod to push it outward.

[0011] Preferably, a plurality of inner ring grooves are formed at one end of the elastic rod, the outer ring grooves and the inner ring grooves are staggered and distributed, and an inner support rod is slidably connected in the inner ring groove, the length of the inner support rod is the same as the groove depth of the inner ring groove, and the inner support rod can be positioned in the groove depth direction of the inner ring groove.

[0012] Preferably, an elastic member 2 is provided between the groove bottom of the inner ring groove and the inner support rod to push the inner support rod outward.

[0013] Preferably, a second recessed groove is provided on the outer peripheral wall of the impact rod, and a second threaded hole connected to the inner ring groove is provided at the bottom of the second recessed groove, and the inner thread of the second threaded hole is connected to a second hexagon socket bolt which abuts against the side wall of the inner support rod, and the screw head of the second hexagon socket bolt is immersed in the second recessed groove.

[0014] The utility model has the following beneficial effects:

[0015] The utility model pushes each outer support rod and inner support rod separately, allowing them to stretch as needed to match the irregular surface of the concrete wall, such as pits or notches. By tightening the hexagon socket bolts one and two, the positions of the inner support rod and the outer support rod can be located, ensuring that the impact rod can effectively cling to the wall for measurement. This design not only improves the measurement accuracy on uneven surfaces, but also expands the scope of application of the measurement, ensuring that relatively accurate strength data can be obtained even on defective walls. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a partial cross-sectional view of the utility model;

[0018] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0019] 1. Cylinder; 2. Strike rod; 201. Outer ring groove; 2011. Outer support rod; 2012. Threaded hole one; 2013. Countersunk groove one; 2014. Hexagon socket bolt one; 2015. Spring one; 202. Inner ring groove; 2021. Inner support rod; 2022. Threaded hole two; 2023. Countersunk groove two; 2024. Hexagon socket bolt two; 2025. Spring two. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] A concrete performance tester, such as Figure 1 and 2 As shown, it includes a cylinder body 1 and a striking rod 2 slidably connected in the cylinder body 1.

[0022] like Figure 3 As shown, one end of the elastic rod is provided with a plurality of outer ring grooves 201, and the plurality of outer ring grooves 201 are distributed in a circular array with the central axis of the impact rod 2 as the center. At the same time, one end of the elastic rod is also provided with a plurality of inner ring grooves 202, and the outer ring grooves 201 and the inner ring grooves 202 are staggered and distributed.

[0023] like Figure 3 As shown, an outer support rod 2011 is slidably connected in the outer ring groove 201, and the length of the outer support rod 2011 is the same as the groove depth of the outer ring groove 201, and an elastic member 1 is arranged between the groove bottom of the outer ring groove 201 and the outer support rod 2011 to push it outward, and the elastic member 1 is a spring 1 2015, and an inner support rod 2021 is slidably connected in the inner ring groove 202, and the length of the inner support rod 2021 is the same as the groove depth of the inner ring groove 202, and an elastic member 2 is arranged between the groove bottom of the inner ring groove 202 and the inner support rod 2021 to push it outward, and the elastic member 2 is a spring 2025, the outer support rod 2011 can be positioned in the groove depth direction of the outer ring groove 201, and the inner support rod 2021 can be positioned in the groove depth direction of the inner ring groove 202.

[0024] Specifically, the outer support rod 2011 and the outer ring groove 201 can be positioned in the groove depth direction, and the inner support rod 2021 and the inner ring groove 202 can be positioned in the groove depth direction as follows:

[0025] like Figure 3 As shown, a recessed groove 2013 is provided on the outer peripheral wall of the impact rod 2, and a threaded hole 2012 communicating with the outer ring groove 201 is provided at the bottom of the recessed groove 2013. A hexagon socket bolt 2014 is threadedly connected to the threaded hole 2012 and abuts against the side wall of the outer support rod 2011, and the screw head of the hexagon socket bolt 2014 is immersed in the recessed groove 2013. A recessed groove 2023 is provided on the outer peripheral wall of the impact rod 2, and a threaded hole 2022 communicating with the inner ring groove 202 is provided at the bottom of the recessed groove 2023. A hexagon socket bolt 2024 is threadedly connected to the threaded hole 2022 and abuts against the side wall of the inner support rod 2021, and the screw head of the hexagon socket bolt 2024 is immersed in the recessed groove 2023.

[0026] During actual measurement, the utility model uses spring 1 2015 and spring 2025 to push the outer support rod 2011 and the inner support rod 2021, so that the two can extend from the end surface of the impact rod 2 and enter the position where the concrete strength measurement is required but there is a gap or a pit on the wall surface, so that many outer support rods 2011 and inner support rods 2021 extend to different lengths compared with the impact rod 2 to adapt to the shape of the pits and gaps on the concrete wall, and then the hexagonal wrench is used to screw the hexagonal bolt 1 2014 and the hexagonal bolt 2 2024, so that the two can respectively adjust the outer support rod 2011 and the inner support rod 2021 in the outer ring groove 201. And position it in the inner circle groove 202, and then use human power to use force through the outer support rod 2011 and the inner support rod 2021 to make the impact rod 2 press against the wall and retract into the cylinder 1. At the same time, the strength of the concrete wall at this point is measured by the structure of the rebound tester in the cylinder 1. When the operator needs to measure the strength of the concrete wall, it is no longer limited to the flat and smooth position of the wall. Even if there are pits and gaps on the concrete wall, they can be adapted through the outer support rod 2011 and the inner support rod 2021 to ensure that when the impact rod 2 contacts the wall, there is a sufficient contact area to bear the force.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A concrete performance tester, comprising a striking rod (2), characterized in that: One end of the impact rod is provided with a plurality of outer ring grooves (201), and an outer support rod (2011) is slidably connected inside the outer ring groove (201). The length of the outer support rod (2011) is the same as the groove depth of the outer ring groove (201), and the outer support rod (2011) can be positioned and arranged in the groove depth direction of the outer ring groove (201).

2. A concrete performance tester according to claim 1, characterized in that: A recessed groove (2013) is provided on the outer peripheral wall of the impact rod (2); a threaded hole (2012) communicating with the outer ring groove (201) is provided at the bottom of the recessed groove (2013); a hexagon socket head bolt (2014) abutting against the side wall of the outer support rod (2011) is connected to the inner thread of the threaded hole (2012); the screw head of the hexagon socket head bolt (2014) is immersed in the recessed groove (2013).

3. A concrete performance tester according to claim 2, characterized in that: The plurality of outer ring grooves (201) are distributed in a circular array with the central axis of the impact rod (2) as the center.

4. A concrete performance tester according to claim 2, characterized in that: An elastic member 1 is provided between the groove bottom of the outer ring groove (201) and the outer support rod (2011) to push it outward.

5. A concrete performance tester according to claim 1, characterized in that: One end of the impact rod is provided with a plurality of inner ring grooves (202), the outer ring grooves (201) and the inner ring grooves (202) are arranged in a staggered distribution, and an inner support rod (2021) is slidably connected in the inner ring groove (202), the length of the inner support rod (2021) is the same as the groove depth of the inner ring groove (202), and the inner support rod (2021) and the inner ring groove (202) can be positioned in the groove depth direction.

6. A concrete performance tester according to claim 5, characterized in that: An elastic member 2 for pushing the inner ring groove (202) outwards is provided between the groove bottom of the inner ring groove (202) and the inner support rod (2021).

7. A concrete performance tester according to claim 5, characterized in that: A second recessed groove (2023) is provided on the outer peripheral wall of the impact rod (2); a second threaded hole (2022) communicating with the inner ring groove (202) is provided at the bottom of the second recessed groove (2023); the second threaded hole (2022) is internally threadedly connected with a second hexagon socket bolt (2024) abutting against the side wall of the inner support rod (2021); the screw head of the second hexagon socket bolt (2024) is immersed in the second recessed groove (2023).

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