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

Abstract

The invention provides a positioning auxiliary device suitable for ultrasonic rebound detection of a circular concrete column and a using method, the positioning auxiliary device 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 invention, 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] The present invention relates to the technical field of concrete column detection, and in particular to a positioning auxiliary device suitable for ultrasonic rebound detection of circular concrete columns and a use method thereof. Background Art

[0002] The "ultrasonic-rebound detection method" is a common method for concrete structure entity detection, which includes: using the detection instrument to transmit or receive ultrasonic waves that pass through the concrete component, measuring the time difference between transmission and reception, and calculating the wave velocity of the ultrasonic wave in combination with the transmission distance of the ultrasonic wave, so as to evaluate the concrete density of the component. The faster the wave velocity, the higher the density of the concrete. Then, combined with the rebound detection data, the concrete strength of the component is corrected and calculated.

[0003] In order to facilitate the calculation of ultrasonic wave velocity, the size with deviation that meets the requirements and easy-to-obtain data is usually directly used as the transmission distance of the ultrasonic wave, and then the coupling point of the detection instrument on the surface of the concrete component is determined; for rectangular section columns or rectangular section beams, their side length or beam width is usually used as the transmission distance of the ultrasonic wave, and the coupling points are drawn on a set of relative sides. For circular section columns, their diameter is usually used as the transmission distance of the ultrasonic wave, but when determining the coupling point of the detection instrument, it is often necessary to locate and lay out the lines, and find two points on the outer wall of the circular section column that are symmetrical about the center of a certain section as the ultrasonic emission coupling point and the ultrasonic reception coupling point. The implementation process is relatively cumbersome and the work efficiency is low. Summary of the invention

[0004] The purpose of the present invention is to provide a positioning auxiliary device and a use method suitable for ultrasonic rebound detection of circular concrete columns, so as to solve the deficiencies in the above-mentioned background technology.

[0005] The technical solution of the present invention is: a positioning auxiliary device suitable for ultrasonic rebound detection of circular concrete columns, comprising:

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

[0007] A detector is arranged on the circular sleeve and is used for detecting the verticality of the axis of the circular sleeve.

[0008] Furthermore, the circular sleeve includes a plurality of arc-shaped plates, and the side ends of adjacent arc-shaped plates are abutted; a circular hoop is arranged on the outer side of the circular sleeve, and the circular hoop is used to lock the arc-shaped plates.

[0009] Furthermore, the circular hoop includes a plurality of arc-shaped steel strips, and connecting ears are respectively arranged at both ends of the arc-shaped steel strips; the connecting ears on adjacent arc-shaped steel strips are abutted and fastened by bolts.

[0010] Furthermore, the side ends of the arc-shaped plates are provided with positioning blocks and / or positioning slots, and the positioning blocks respectively located on different arc-shaped plates are connected to the positioning slots to control the heights of the arc-shaped plates to be consistent.

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

[0012] Furthermore, an outer wall of the arc-shaped plate is provided with an arc-shaped groove, and the arc-shaped groove is coaxial with the arc-shaped plate and is used for installing the round hoop.

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

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

[0015] The technical solution of the present invention also includes: a method for using the above-mentioned positioning auxiliary device suitable for ultrasonic rebound detection of circular concrete columns, which includes the steps of:

[0016] Press the inner wall of the circular sleeve against the outer wall of the circular concrete column to be tested, and use a detector to determine the verticality of the axis of the circular sleeve;

[0017] The circular clamp is sleeved on the outer side of the circular sleeve and locked, and the ultrasonic transmitting instrument and the ultrasonic receiving instrument are respectively passed through the first positioning window and the second positioning window to be coupled to the outer wall of the circular concrete column to be measured;

[0018] The transmission time of ultrasonic waves is detected by the pair measurement method. The diameter of the circular concrete column is used as the transmission distance of ultrasonic waves. The wave velocity of ultrasonic waves is calculated to evaluate the density of concrete.

[0019] The beneficial effect of the present invention is as follows: by providing a circular sleeve coaxial with the circular concrete column to be measured, and providing a first positioning window and a second positioning window symmetrical about the axis of 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 measured, 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 measured, thereby ensuring the measurement accuracy and improving the detection efficiency compared with the cumbersome and complicated laying-out method. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1is a usage state diagram of embodiment 1 of the present invention;

[0021] Figure 2 is a structural diagram of a circular sleeve in Embodiment 1 of the present invention;

[0022] Figure 3 is a structural diagram of a round clamp in Embodiment 1 of the present invention;

[0023] Figure 4 is a top cross-sectional view of the circular sleeve in Example 1 of the present invention;

[0024] Figure 5 is a structural diagram of a circular sleeve in Embodiment 2 of the present invention;

[0025] Figure 6 is a structural diagram of a circular sleeve in Embodiment 3 of the present invention;

[0026] In the figure:

[0027] 1. Round sleeve; 11. Arc plate;

[0028] 2. Round hoop; 21. Arc steel belt; 22. Connecting ear piece; 23. Mounting hole; 24. Bolt;

[0029] 3. Detector;

[0030] 4. The first positioning window;

[0031] 5. Second positioning window;

[0032] 6. Positioning plug;

[0033] 7. Positioning slot;

[0034] 8. Arc groove. DETAILED DESCRIPTION

[0035] The technical solutions of the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0036] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set" and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0037] Example 1

[0038] Reference Figure 1-4 The present embodiment provides a positioning auxiliary device suitable for ultrasonic rebound detection of circular concrete columns, which includes a circular sleeve 1, a circular hoop 2 and a detector 3. The circular sleeve 1 includes two arc plates 11. The arc length of the arc plate 11 is a semicircle, and the inner diameter is the same as the radius of the circular concrete column to be tested. The two arc plates 11 have the same axial length, and the side ends of the two arc plates 11 abut against each other to enclose the circular sleeve 1; the circular hoop 2 includes a portion located on the outer side of the arc plate 11, which is used to lock the arc plate 11 on the outer wall of the circular concrete column to be tested; the two arc plates 11 are respectively provided with a first positioning window 4 and a second positioning window 5, and the first positioning window 4 and the second positioning window 5 are symmetrical about the axis of the circular sleeve 1; the detector 3 is arranged on the circular sleeve 1, and is used to detect the verticality of the axis of the circular sleeve 1.

[0039] During implementation, the inner wall of the arc plate 11 is pressed against the outer wall of the circular concrete column to be tested, and the staff verifies that the heights of the two arc plates 11 are consistent to ensure that the heights of the first positioning window 4 and the second positioning window 5 respectively located on the two arc plates 11 correspond, and the detector 3 is used to determine the verticality of the axis of the circular sleeve 1 to ensure its coaxiality with the concrete to be tested; the circular hoop 2 is sleeved on the outer side of the arc plate 11 and locked to prevent the arc plate 11 from sliding along the axial direction of the circular concrete column to be tested; the ultrasonic transmitter and the ultrasonic receiver are respectively passed through the first positioning window 4 and the second positioning window 5 and coupled to the outer wall of the circular concrete column to be tested, and the transmission time of the ultrasonic wave is detected by the pair measurement method, and 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, and then the density of the concrete can be evaluated.

[0040] The device is prefabricated to ensure the symmetry accuracy of the first positioning window 4 and the second positioning window 5, and the detector 3 is used to monitor and ensure the coaxiality of the circular sleeve 1 and the circular concrete column to be measured. 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, 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 measured, thereby ensuring the measurement accuracy and improving the detection efficiency compared with the cumbersome and complicated line-laying method.

[0041] More specifically, the circular clamp 2 includes two arc-shaped steel strips 21, the arc length of the arc-shaped steel strips 21 is a semicircle, and the inner diameter is the same as the outer diameter of the arc-shaped plate 11; connecting ears 22 are arranged at both ends of the arc-shaped steel strips 21, and mounting holes 23 are arranged on the connecting ears 22. When connecting the two arc-shaped steel strips 21, the corresponding connecting ears 22 are abutted against each other, and bolts 24 are inserted into the mounting holes 23 and tightened.

[0042] According to the requirements of the ultrasonic testing specification, multiple testing points should be set, so the first positioning windows 4 and the second positioning windows 5 can be respectively arranged in the same rows along the axial direction of the circular sleeve 1, and the same number of first positioning windows 4 and second positioning windows 5 can be respectively arranged in each row. In this embodiment, 4 rows of first positioning windows 4 are arranged on one arc plate 11, and 4 rows of second positioning windows 5 are arranged on the other arc plate 11. From top to bottom, the heights of the 4 rows of first positioning windows 4 and the 4 rows of second positioning windows 5 are respectively consistent. In each row, the first positioning windows 4 and the second positioning windows 5 are symmetrical about the axis of the circular sleeve 1 surrounded by the two arc plates 11 to ensure the measurement accuracy.

[0043] In this embodiment, the two axial end surfaces of the arc plate 11 are respectively perpendicular to its own axis. The detector 3 adopts a bubble level, which is constructed on the top surface or bottom surface (i.e., its axial end surface) of the arc plate 11. When the bubble in the bubble level is centered, it means that the top surface and bottom surface of the arc plate 11 are horizontal, and 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 pressed against each other, it means that the arc plate 11 coincides with the axis of the circular concrete column to be measured, and the measurement accuracy can be guaranteed.

[0044] The device has a simple structure, accurate positioning, is easy to install and disassemble, can be used in a cyclical manner to save costs, and is suitable for popularization and application.

[0045] Example 2

[0046] Reference Figure 5 Compared with Example 1, the difference of this embodiment is that the side end of the arc plate 11 is configured with a positioning block 6 and / or a positioning slot 7, and the positioning blocks 6 located on different arc plates 11 are connected to the positioning slots 7 to control the height of each arc plate 11 to be consistent, thereby reducing the process and time consumption of the staff to adjust the height of the two arc plates 11, and further improving the accuracy and measurement efficiency of the arc plate 11.

[0047] During implementation, positioning blocks 6 can be configured at both side ends of one arc plate 11, and positioning slots 7 can be configured at both side ends of the other arc plate 11. During manufacturing, it is ensured that the positioning blocks 6 and the positioning slots 7 are in the same position along the axis direction of the arc plate 11.

[0048] The connection configurations of the two arc plates 11 and the positioning blocks 6 and the positioning slots 7 can also be made completely identical, that is, when the two arc plates 11 overlap, the positioning blocks 6 are located at the same side end of the arc plates 11, the positioning slots 7 are located at the same side end of the arc plates 11, and the positioning blocks 6 and the positioning slots 7 are at the same position along the axial direction of the arc plates 11.

[0049] It is also possible to construct both the positioning block 6 and the positioning slot 7 on the same side end of the arc plate 11, and to construct the positioning slot 7 and positioning block 6 (not shown in the drawings) with matching positions and quantities on another arc plate 11.

[0050] In the above, the number of the positioning plug 6 and the positioning slot 7 is not specifically limited, and can be one or more; the cross-sectional shapes of the two are adapted, and can be polygonal, circular or elliptical.

[0051] Example 3

[0052] Reference Figure 6 Compared with the embodiment 1, the difference of this embodiment is that the outer wall of the arc plate 11 is provided with an arc groove 8, and the arc groove 8 is coaxial with the arc plate 11, and is used to install the round hoop 2. The arc groove 8 is provided to facilitate the accurate positioning and installation of the round hoop 2, and improve its fastening effect on the arc plate 11.

[0053] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A positioning auxiliary device suitable for ultrasonic rebound detection of circular concrete columns, characterized in that: include: A circular sleeve, wherein a first positioning window and a second positioning window are formed on a side wall of the circular sleeve, and the first positioning window and the second positioning window are symmetrical about the axis of the circular sleeve; A detector is arranged on the circular sleeve and is used for detecting the verticality of the axis of the circular sleeve.

2. The positioning auxiliary device for ultrasonic rebound detection of circular concrete columns according to claim 1 is characterized in that: The circular sleeve includes a plurality of arc-shaped plates, and the side ends of adjacent arc-shaped plates are abutted; a circular hoop is arranged on the outer side of the circular sleeve, and the circular hoop is used to lock the arc-shaped plates.

3. The positioning auxiliary device for ultrasonic rebound detection of circular concrete columns according to claim 2 is characterized in that: The circular hoop comprises a plurality of arc-shaped steel strips, and connecting ears are respectively arranged at both ends of the arc-shaped steel strips; the connecting ears on adjacent arc-shaped steel strips are abutted and fastened by bolts.

4. The positioning auxiliary device for ultrasonic rebound detection of circular concrete columns according to claim 2 or 3, characterized in that: The side ends of the arc plates are provided with positioning blocks and / or positioning slots, and the positioning blocks respectively located on different arc plates are connected to the positioning slots to control the heights of the arc plates to be consistent.

5. The positioning auxiliary device for ultrasonic rebound detection of circular concrete columns according to claim 4 is characterized in that: The cross-sectional shape of the positioning plug is adapted to that of the positioning slot, and is polygonal, circular or elliptical.

6. The positioning auxiliary device for ultrasonic rebound detection of circular concrete columns according to any one of claims 2-3 and 5, characterized in that: An arc-shaped groove is provided on the outer wall of the arc-shaped plate, and the arc-shaped groove is coaxial with the arc-shaped plate and is used for installing the round hoop.

7. The positioning auxiliary device for ultrasonic rebound detection of circular concrete columns according to claim 6 is characterized in that: Along the axial direction of the circular sleeve, the first positioning windows and the second positioning windows are respectively arranged in the same rows, and each row is respectively arranged with the same number.

8. The positioning auxiliary device for ultrasonic rebound detection of circular concrete columns according to any one of claims 1-3, 5 and 7, characterized in that: The detector is a bubble level, which is arranged on the top surface and / or the bottom surface of the circular sleeve.

9. A method for using the positioning auxiliary device for ultrasonic rebound detection of circular concrete columns according to any one of claims 1 to 8, characterized in that: Includes steps: Press the inner wall of the circular sleeve against the outer wall of the circular concrete column to be tested, and use a detector to determine the verticality of the axis of the circular sleeve; The circular clamp is sleeved on the outer side of the circular sleeve and locked, and the ultrasonic transmitting instrument and the ultrasonic receiving instrument are respectively passed through the first positioning window and the second positioning window to be coupled to the outer wall of the circular concrete column to be measured; The transmission time of ultrasonic waves is detected by the pair measurement method. The diameter of the circular concrete column is used as the transmission distance of ultrasonic waves. The wave velocity of ultrasonic waves is calculated to evaluate the density of concrete.

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