Box culvert concrete hardening detection device

Abstract

The utility model relates to a box culvert concrete hardening detection device which comprises a positioning frame, a rebound apparatus is arranged on the positioning frame in a penetrating mode, a sleeve is fixedly installed on the positioning frame, the upper portion of the rebound apparatus is arranged on the inner side of the sleeve in a penetrating mode, the top of the rebound apparatus is fixedly connected with a pressing rod, the sleeve is arranged on the outer side of the lower portion of the pressing rod in a sleeved mode, and the pressing rod is fixedly connected with the rebound apparatus. A limiting ring is fixedly installed on the outer side of the upper portion of the rebound instrument, a spring is arranged between the limiting ring and the bottom face in the sleeve, and the rebound instrument is sleeved with the spring. And a side pushing device is arranged above the pressing rod. According to the utility model, the positioning frame is utilized to ensure that the axis of an instrument is always vertical to the surface of concrete during hardness detection; by means of the side pushing structure, an operator only needs to push the push rod from the side face, pressure can be slowly and evenly applied to the instrument, hardness detection is completed, the situation that measurement cannot be directly conducted due to the influence of box culvert bottom foundation steel bars is avoided, operation safety is guaranteed, and measurement efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of box culvert hardening detection, in particular to a box culvert concrete hardening detection device. Background Art

[0002] Box culverts are a common structure used in water conservancy projects, primarily used to span rivers, drainage ditches, roads, and other structures. They provide a channel for water flow while also supporting overhead traffic loads. They are typically rectangular or cube-shaped. Box culverts are typically cast in situ using a concrete pouring process. The entire box can be poured in two stages. After the first pour, the culvert body concrete should be compacted when its strength reaches 100%, followed by a second pour to complete the remaining portion. The joints between the two pours should ensure a good interface. After the first pour, using a conventional rebound hammer to test the concrete strength is difficult due to the influence of the foundation reinforcement, hindering the timely detection of the concrete hardening degree. Utility Model Content

[0003] The utility model aims to solve the deficiencies of the prior art and provides a box culvert concrete hardening detection device.

[0004] The cam is fixedly mounted on the support frame, the cam being mounted on a support structure configured to detect the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of

[0005] Furthermore, a groove is provided on the top of the side push block, and the groove is adapted to the shape of the protrusion.

[0006] Furthermore, a slide groove is provided on the upper portion of the support column, and the upper end of the pressure rod is slidably arranged in the slide groove; an arc groove is provided on the lower portion of the support column, and the sleeve is fixedly installed in the arc groove.

[0007] Furthermore, a digital display screen is installed on the outside of the sleeve.

[0008] Furthermore, the outer end of the push rod is covered with an anti-slip cover.

[0009] The beneficial effects of the present invention are as follows: the present invention provides a box culvert concrete hardening detection device, which utilizes a positioning frame to ensure that the axis of the instrument is always perpendicular to the surface of the concrete during hardness testing; utilizing a side-push structure, the operator only needs to push the push rod from the side to achieve slow and uniform pressure on the instrument to complete the hardness test, thereby preventing the instrument from being affected by the foundation steel bars at the bottom of the box culvert and being unable to perform direct measurement, thereby ensuring the safety of operation and improving the efficiency of measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural diagram of the utility model;

[0011] Figure 2 It is a cross-sectional view of the utility model;

[0012] Figure 3 is a cross-sectional view of the support column;

[0013] In the figure: 1- positioning frame; 2- rebound tester; 3- sleeve; 4- pressure rod; 5- limiting ring; 6- spring; 7- support column; 8- ear plate; 9- side push block; 10- guide cylinder; 11- through groove; 12- push rod; 13- protrusion; 14- slide groove; 15- arc groove; 16- digital display; 17- anti-slip sleeve;

[0014] The drawings in this utility model are all schematic diagrams, and their sizes do not represent actual sizes;

[0015] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] like Figures 1 to 3As shown, a box culvert concrete hardening detection device comprises: a positioning frame 1, a rebound hammer 2 is passed through the positioning frame 1, a sleeve 3 is fixedly installed on the positioning frame 1, the upper part of the rebound hammer 2 is passed through the inner side of the sleeve 3, the top of the rebound hammer 2 is fixedly connected to a pressure rod 4, the top of the pressure rod 4 is provided with a Z-shaped slope, the sleeve 3 is sleeved on the outer side of the lower part of the pressure rod 4, a limiting ring 5 is fixedly installed on the outer side of the upper part of the rebound hammer 2, a spring 6 is provided between the limiting ring 5 and the inner bottom surface of the sleeve 3, and the spring 6 is sleeved on the rebound hammer 2 Outside; a support column 7 is fixedly installed on the positioning frame 1, and the support column 7 is arranged on the longer side of the pressure rod 4. Two ear plates 8 are fixedly installed on both sides of the support column 7, and a side push block 9 is rotatably arranged between the two ear plates 8. One end of the side push block 9 abuts against the top of the pressure rod 4. A guide cylinder 10 is fixedly installed on the top of the support column 7, and a through groove 11 is opened at the bottom of the guide cylinder 10. A push rod 12 is passed through the guide cylinder 10, and a protrusion 13 is fixed at the bottom of the push rod 12, and the protrusion 13 passes through the through groove 11.

[0018] Specifically, the rebound hammer 2 is supported by the spring 6 and the limiting ring 5 so that the head of the striking rod of the rebound hammer 2 is flush with the bottom of the positioning frame 1 in a natural state.

[0019] A groove is formed on the top of the side push block 9 , and the groove is adapted to the shape of the protrusion 13 .

[0020] Specifically, when the protrusion 13 moves toward the side push block 9, the protrusion 13 will be inserted into the groove to push the side push block 9 to rotate.

[0021] A sliding groove 14 is provided on the upper portion of the support column 7 , and the upper end of the pressure rod 4 is slidably arranged in the sliding groove 14 ; an arc groove 15 is provided on the lower portion of the support column 7 , and the sleeve 3 is fixedly installed in the arc groove 15 .

[0022] A digital display screen 16 is installed on the outside of the sleeve 3 .

[0023] Specifically, the digital display screen 16 is electrically connected to the rebound hammer 2 and is used to display the rebound value.

[0024] The outer end of the push rod 12 is covered with an anti-slip sleeve 17.

[0025] Specifically, the anti-slip cover 17 is provided to facilitate the operator to grip the push rod 12 .

[0026] The usage method and principle of the utility model are as follows: the positioning frame 1 and the impact rod of the rebound test hammer 2 are pressed against the surface of the concrete to ensure that the axis of the rebound test hammer 2 is always perpendicular to the surface of the concrete, and the push rod 12 is pushed. The push rod 12 drives the protrusion 13 to move, and the protrusion 13 drives the side push block 9 to rotate. The side push block 9 rotates and squeezes the pressure rod 4 to move downward along the slide groove 14. The pressure rod 4 drives the rebound test hammer 2 to move downward slowly and evenly to apply pressure to the rebound test hammer 2, and the measured point is struck. The rebound value at this time is read, and the push rod 12 is pulled back to drive the side push block 9 to return to its original position. The spring 6 rebounds and drives the rebound test hammer 2 to reset upward, completing a test.

[0027] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or they are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A box culvert concrete hardening detection device, characterized in that: include: A positioning frame (1), wherein a rebound hammer (2) is passed through the positioning frame (1), a sleeve (3) is fixedly mounted on the positioning frame (1), the upper portion of the rebound hammer (2) is passed through the inner side of the sleeve (3), a pressure rod (4) is fixedly connected to the top of the rebound hammer (2), a Z-shaped slope is provided on the top of the pressure rod (4), the sleeve (3) is sleeved on the outer side of the lower portion of the pressure rod (4), a limiting ring (5) is fixedly mounted on the outer side of the upper portion of the rebound hammer (2), a spring (6) is provided between the limiting ring (5) and the inner bottom surface of the sleeve (3), and the spring (6) is sleeved on the outer side of the rebound hammer (2); the positioning frame (1) A support column (7) is fixedly installed on the top, and the support column (7) is arranged on the longer side of the pressure rod (4). Two ear plates (8) are fixedly installed on both sides of the support column (7). A side push block (9) is rotatably arranged between the two ear plates (8). One end of the side push block (9) abuts against the top of the pressure rod (4). A guide cylinder (10) is fixedly installed on the top of the support column (7). A through groove (11) is opened at the bottom of the guide cylinder (10). A push rod (12) is passed through the guide cylinder (10). A protrusion (13) is fixed at the bottom of the push rod (12), and the protrusion (13) passes through the through groove (11).

2. A box culvert concrete hardening detection device according to claim 1, characterized in that: A groove is provided on the top of the side push block (9), and the groove is adapted to the shape of the protrusion (13).

3. A box culvert concrete hardening detection device according to claim 1, characterized in that: The upper portion of the support column (7) is provided with a slide groove (14), and the upper end of the pressure rod (4) is slidably arranged in the slide groove (14); the lower portion of the support column (7) is provided with an arc groove (15), and the sleeve (3) is fixedly installed in the arc groove (15).

4. A box culvert concrete hardening detection device according to claim 1, characterized in that: A digital display screen (16) is installed on the outside of the sleeve (3).

5. The box culvert concrete hardening detection device according to claim 1, characterized in that: The outer end of the push rod (12) is provided with an anti-slip sleeve (17).

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