Positioning auxiliary device suitable for ultrasonic rebound detection of circular concrete column

Abstract

The utility model provides an auxiliary positioning device suitable for ultrasonic rebound detection of a circular concrete column, which comprises a circular sleeve and a detector, the side wall of the circular sleeve is provided with a first positioning window and a second positioning window, and the first positioning window and the second positioning window are symmetrical about the axis of the circular sleeve; the detector is arranged on the round sleeve and is used for detecting the axis perpendicularity of the round sleeve; the round sleeve comprises a plurality of arc-shaped plates, and the side ends of the adjacent arc-shaped plates abut against each other. A circular hoop is arranged on the outer side of the circular sleeve and used for locking the arc-shaped plate. According to the utility model, the circular sleeve coaxial with the to-be-tested circular concrete column is arranged, and the first positioning window and the second positioning window which are symmetrical about the axis of the circular sleeve are arranged on the circular sleeve, so that the first positioning window and the second positioning window are ensured to be symmetrical about the axis of the to-be-tested circular concrete column; the actual transmission distance of the ultrasonic waves is the same as the transmission distance used for calculation and is the diameter of the circular concrete column to be measured, the measurement and calculation precision is guaranteed, and the detection efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of concrete column testing technology, and in particular to a positioning auxiliary device suitable for ultrasonic rebound testing of circular concrete columns. Background Technology

[0002] The ultrasonic rebound test is a common method for testing concrete structures. It involves using a testing instrument to emit or receive ultrasonic waves that pass through the concrete member, measuring the time difference between emission and reception, and calculating the wave velocity based on the transmission distance. This allows for the evaluation of the concrete's density; a faster wave velocity indicates higher density. Then, the rebound test data is used to correct the concrete strength calculation.

[0003] To facilitate the calculation of ultrasonic wave velocity, the dimension with acceptable deviation and readily available data is usually directly used as the transmission distance of the ultrasonic wave, thereby determining the coupling point of the testing instrument on the surface of the concrete component. For rectangular cross-section columns or beams, the side length or beam width is usually used as the transmission distance of the ultrasonic wave, and the coupling point is drawn on a set of opposite sides. For circular cross-section columns, the diameter is usually used as the transmission distance of the ultrasonic wave. However, determining the coupling point of the testing instrument often requires positioning and laying out lines to find two points on the outer wall of the circular cross-section column that are symmetrical about the center of a certain cross-section, which are used as the ultrasonic transmission coupling point and the ultrasonic receiving coupling point. The implementation process is relatively cumbersome and the work efficiency is low. Utility Model Content

[0004] The purpose of this invention is to provide a positioning auxiliary device suitable for ultrasonic rebound testing of circular concrete columns, thereby overcoming the shortcomings in the aforementioned background technology.

[0005] The technical solution of this utility model is: a positioning auxiliary device suitable for ultrasonic rebound testing of circular concrete columns, comprising:

[0006] A circular sleeve, wherein a first positioning window and a second positioning window are provided on the side wall of the circular sleeve, and the two are symmetrical about the axis of the circular sleeve;

[0007] A testing instrument, mounted on the circular sleeve, is used to detect the perpendicularity of the circular sleeve's axis.

[0008] Furthermore, the circular sleeve includes several arc-shaped plates, with the side ends of adjacent arc-shaped plates abutting each other; a circular clamp is provided on the outer side of the circular sleeve, which is used to lock the arc-shaped plates.

[0009] Furthermore, the circular clamp includes several arc-shaped steel strips, and each end of the arc-shaped steel strip is provided with a connecting lug; the connecting lugs on adjacent arc-shaped steel strips abut against each other and are fastened by bolts.

[0010] Furthermore, the side end of the arc-shaped plate is provided with a positioning block and / or a positioning slot, and the positioning block located on different arc-shaped plates is connected to the positioning slot to control the height of each arc-shaped plate to be consistent.

[0011] Furthermore, the positioning plug is adapted to the cross-sectional shape of the positioning slot, and is polygonal, circular or elliptical.

[0012] Furthermore, the outer wall of the arc-shaped plate is provided with an arc-shaped groove, which is coaxial with the arc-shaped plate and is used to install the circular clamp.

[0013] Furthermore, along the axial direction of the circular sleeve, the first positioning window and the second positioning window are respectively arranged in the same row, and each row is arranged with the same number of windows.

[0014] Furthermore, the detector is a bubble level, which is positioned on the top and / or bottom surface of the circular sleeve.

[0015] The beneficial effects of this utility model are as follows: by setting a circular sleeve coaxial with the circular concrete column to be tested, and setting a first positioning window and a second positioning window symmetrical about its axis on the circular sleeve, it is ensured that the first positioning window and the second positioning window are symmetrical about the axis of the circular concrete column to be tested, so that the actual transmission distance of the ultrasonic wave is the same as the transmission distance used for calculation, both of which are the diameter of the circular concrete column to be tested, thus ensuring the accuracy of the measurement, and improving the detection efficiency compared with the cumbersome and complicated wire laying method. Attached Figure Description

[0016] Figure 1 This is a usage state diagram of Embodiment 1 of this utility model;

[0017] Figure 2 This is a structural diagram of the circular sleeve in Embodiment 1 of this utility model;

[0018] Figure 3 This is a structural diagram of the circular clamp in Embodiment 1 of this utility model;

[0019] Figure 4 This is a top sectional view of the circular sleeve in Embodiment 1 of this utility model;

[0020] Figure 5 This is a structural diagram of the circular sleeve in Embodiment 2 of this utility model;

[0021] Figure 6 This is a structural diagram of the circular sleeve in Embodiment 3 of this utility model;

[0022] In the picture:

[0023] 1. Circular sleeve; 11. Arc-shaped plate;

[0024] 2. Round clamp; 21. Curved steel strip; 22. Connecting lug; 23. Mounting hole; 24. Bolt;

[0025] 3. Detector;

[0026] 4. First positioning window;

[0027] 5. Second positioning window;

[0028] 6. Positioning insert;

[0029] 7. Positioning slot;

[0030] 8. Arc-shaped groove. Detailed Implementation

[0031] The technical solutions of the embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0032] In the description of the embodiments of this utility model, it should be understood that the terms "top," "bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, it should be noted that unless otherwise expressly specified and limited, the terms "set" and "connected" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two elements. Those skilled in the art can understand the specific meaning of the above terms in this utility model through specific circumstances.

[0033] Example 1

[0034] Reference Appendix Figure 1-4 This embodiment provides a positioning auxiliary device suitable for ultrasonic rebound testing of circular concrete columns, which includes a circular sleeve 1, a circular clamp 2, and a detector 3. The circular sleeve 1 includes two arc-shaped plates 11, the arc length of which is semi-circular, the inner diameter of which is the same as the radius of the circular concrete column to be tested, the axial length of the two arc-shaped plates 11 is the same, and the side ends of the two arc-shaped plates 11 abut against each other to form a circular sleeve 1. The circular clamp 2 is located on the outside of the arc-shaped plates 11 and is used to lock the arc-shaped plates 11 to the outer wall of the circular concrete column to be tested. The two arc-shaped plates 11 are respectively provided with a first positioning window 4 and a second positioning window 5, which are symmetrical about the axis of the circular sleeve 1. The detector 3 is mounted on the circular sleeve 1 and is used to detect the perpendicularity of the axis of the circular sleeve 1.

[0035] During implementation, the inner wall of the arc-shaped plate 11 is pressed tightly against the outer wall of the circular concrete column to be tested. The staff verifies that the heights of the two arc-shaped plates 11 are consistent to ensure that the heights of the first positioning window 4 and the second positioning window 5 located on the two arc-shaped plates 11 correspond. The perpendicularity of the axis of the circular sleeve 1 is determined using the detector 3 to ensure its coaxiality with the concrete to be tested. The circular clamp 2 is fitted onto the outside of the arc-shaped plate 11 and locked to prevent the arc-shaped plate 11 from sliding along the axial direction of the circular concrete column to be tested. The ultrasonic transmitter and ultrasonic receiver are coupled to the outer wall of the circular concrete column to be tested through the first positioning window 4 and the second positioning window 5, respectively. The transmission time of the ultrasonic wave is detected using the method of comparison. The diameter of the circular concrete column is used as the transmission distance of the ultrasonic wave, and the wave velocity of the ultrasonic wave is calculated to evaluate the density of the concrete.

[0036] This device is prefabricated to ensure the symmetry accuracy of the first positioning window 4 and the second positioning window 5. Furthermore, the coaxiality of the circular sleeve 1 and the circular concrete column to be measured is ensured by the monitoring instrument 3. After the circular sleeve 1 is accurately installed on the circular concrete column to be measured, the first positioning window 4 and the second positioning window 5 are symmetrical about the axis of the circular concrete column to be measured. This ensures that the actual transmission distance of the ultrasonic wave is the same as the transmission distance used for calculation, which is the diameter of the circular concrete column to be measured. This guarantees the accuracy of the measurement and improves the detection efficiency compared to the cumbersome and complicated wire laying method.

[0037] More specifically, the circular clamp 2 includes two arc-shaped steel strips 21, the arc length of which is a semicircle, and the inner diameter is the same as the outer diameter of the arc plate 11; the two ends of the arc-shaped steel strips 21 are provided with connecting lugs 22, and the connecting lugs 22 are provided with mounting holes 23. When connecting the two arc-shaped steel strips 21, the corresponding connecting lugs 22 are abutted against each other, and bolts 24 are inserted into the mounting holes 23 and tightened.

[0038] According to the requirements of ultrasonic testing specifications, multiple testing points should be set. Therefore, along the axial direction of the circular sleeve 1, the first positioning window 4 and the second positioning window 5 can be arranged in the same rows, with the same number of windows in each row. In this embodiment, four rows of first positioning windows 4 are arranged on one arc plate 11, and four rows of second positioning windows 5 are arranged on another arc plate 11. From top to bottom, the heights of the four rows of first positioning windows 4 and the four rows of second positioning windows 5 are the same. In each row, the first positioning windows 4 and the second positioning windows 5 are symmetrical about the axis of the circular sleeve 1 formed by the two arc plates 11 to ensure measurement accuracy.

[0039] In this embodiment, the two axial end faces of the arc plate 11 are perpendicular to its own axis. The detector 3 adopts a bubble level, which is set on the top or bottom surface (i.e., its axial end face) of the arc plate 11. When the bubble in the bubble level is centered, it indicates that the top and bottom surfaces of the arc plate 11 are horizontal, and that the axis of the arc plate 11 is vertical. Since the inner diameter of the arc plate 11 is the same as the radius of the circular concrete column to be measured, and the two are in close contact, it indicates that the axis of the arc plate 11 coincides with that of the circular concrete column to be measured, which can ensure the accuracy of the measurement.

[0040] This device has a simple structure, precise positioning, and is easy to install and disassemble. It can be reused to save costs and is suitable for widespread application.

[0041] Example 2

[0042] Reference Appendix Figure 5 Compared with Embodiment 1, the only difference in this embodiment is that the side end of the arc plate 11 is provided with a positioning block 6 and / or a positioning slot 7. The positioning block 6 located on different arc plates 11 is connected to the positioning slot 7 to control the height of each arc plate 11 to be consistent, reduce the process and time of adjusting the height of the two arc plates 11, and further improve the accuracy and measurement efficiency of the arc plate 11.

[0043] In practice, positioning blocks 6 can be installed on both sides of one arc plate 11, and positioning slots 7 can be installed on both sides of the other arc plate 11. During manufacturing, it is ensured that the positioning blocks 6 and positioning slots 7 are in the same position along the axis of the arc plate 11.

[0044] Alternatively, the connection configuration of the two arc plates 11 with the positioning block 6 and the positioning slot 7 can be completely identical, that is: when the two arc plates 11 overlap, the positioning block 6 is located at the same side end of the arc plate 11, the positioning slot 7 is located at the same side end of the arc plate 11, and the positioning block 6 and the positioning slot 7 are in the same position along the axis of the arc plate 11.

[0045] Alternatively, both a positioning block 6 and a positioning slot 7 can be constructed on the same side of the arc plate 11, while a positioning slot 7 and a positioning block 6 adapted to their positions and quantities can be constructed on another arc plate 11 (not shown in the attached figure).

[0046] In the above, the number of positioning blocks 6 and positioning slots 7 is not specifically limited, and there can be one or more; the cross-sectional shapes of the two are compatible and can be polygonal, circular or elliptical.

[0047] Example 3

[0048] Reference Appendix Figure 6Compared with Embodiment 1, the only difference in this embodiment is that the outer wall of the arc-shaped plate 11 is provided with an arc-shaped groove 8, which is coaxial with the arc-shaped plate 11 and is used to install the circular clamp 2. The arc-shaped groove 8 facilitates the precise positioning and installation of the circular clamp 2, and improves its fastening effect on the arc-shaped plate 11.

[0049] The above are preferred embodiments of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A positioning aid suitable for use in ultrasonic rebound testing of circular concrete columns, characterised in that, The application relates to a round sleeve and a detection instrument. The round sleeve comprises a first positioning window and a second positioning window on the side wall of the round sleeve, and the two windows are symmetrical about the axis of the round sleeve. The detection instrument is arranged on the round sleeve and is used for detecting the perpendicularity of the axis of the round sleeve.

2. The positioning aid for ultrasonic-rebound testing of circular concrete columns according to claim 1, characterized in that The round sleeve comprises a plurality of arc-shaped plates, and the side ends of adjacent arc-shaped plates are abutted.

3. The positioning aid for ultrasonic-rebound testing of circular concrete columns according to claim 2, characterized in that The outer side of the round sleeve is provided with a round hoop, and the round hoop is used for locking the arc-shaped plates.

4. The positioning aid for ultrasonic-rebound testing of circular concrete columns according to claim 2 or 3, characterized in that The round hoop comprises a plurality of arc-shaped steel bands, and the two ends of each arc-shaped steel band are respectively provided with a connecting lug.

5. The positioning aid for ultrasonic-rebound testing of circular concrete columns according to claim 4, characterized in that The connecting lugs on adjacent arc-shaped steel bands are abutted and fastened through bolts.

6. The positioning aid for ultrasonic-rebound testing of circular concrete columns according to any of claims 2-3, 5, characterized in that, The side ends of the arc-shaped plates are provided with positioning plugs and / or positioning slots.

7. The positioning aid suitable for ultrasonic-rebound testing of circular concrete columns according to claim 6, characterized in that, The positioning plugs and the positioning slots on different arc-shaped plates are connected to control the height consistency of the arc-shaped plates.

8. The positioning aid for ultrasonic-rebound testing of circular concrete columns according to any of claims 1-3, 5, 7, characterized in that, The cross-sectional shape of the positioning plug and the positioning slot is adapted to be polygonal, circular or elliptical. The outer wall of the arc-shaped plate is provided with an arc-shaped groove coaxial with the arc-shaped plate, and the arc-shaped groove is used for mounting the round hoop. Along the axial direction of the round sleeve, the first positioning window and the second positioning window are respectively provided with the same row, and each row is provided with the same number. The detection instrument is a bubble level arranged on the top surface and / or the bottom surface of the round sleeve.

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