Concrete crack detection device

Abstract

The invention discloses a concrete crack detection device, comprising: a detector for displaying a detection value; the pair of detection probes is connected with the detector and used for abutting against the surface of the concrete building to be detected; the positioner is used for leaning against the surface of the concrete building to be detected and limiting the position of the detection probe; the positioner comprises a supporting seat and a pair of transverse rods, the transverse rods are rotationally connected to the two ends of the supporting seat respectively, and the upper side and the lower side of each transverse rod are each provided with a notch allowing the corresponding detection probe to be embedded in. Compared with the prior art, the positioning device has the following advantages and effects that by arranging the folding storage type positioning device, the positioning device can be rapidly placed at the to-be-detected position of concrete, rapid positioning and accurate positioning of the position of the detection probe are achieved, no matter cross-seam detection or non-cross-seam detection is adopted, line marking is not needed, the detection process is more convenient, the detection efficiency is improved, and the detection cost is reduced. Meanwhile, the detection precision is ensured.

Description

Technical Field

[0001] The invention relates to the field of concrete crack detection, and in particular to a concrete crack detection device. Background Art

[0002] Concrete cracks can be caused by a variety of factors, including but not limited to material shrinkage, temperature changes, loads beyond the design range, foundation settlement or chemical reactions. Concrete crack detection is an important step in ensuring the safety and durability of buildings and other concrete structures.

[0003] At present, concrete crack detection usually uses the propagation characteristics of ultrasonic waves in concrete to detect internal defects. It is generally divided into the following two detection methods: The first is cross-crack detection, which requires placing ultrasonic transmitting probes and ultrasonic receiving probes equidistantly at 100mm, 150mm and 200mm on both sides of the crack. The transmitting probe emits high-frequency ultrasonic pulses, which pass through the concrete and reach the receiving probe on the opposite side.

[0004] The second is non-cross-crack detection, which requires determining an initial position in a crack-free area near the crack and placing an ultrasonic transmitting probe. At the same time, ultrasonic receiving probes are placed at 100mm, 150mm and 200mm away from the initial position. The ultrasonic transmitting probe emits ultrasonic pulses into the concrete. When these pulses encounter different interfaces (such as cracks, gaps or other heterogeneous areas), part of the energy will be reflected back and captured by the ultrasonic receiving probe.

[0005] However, no matter whether the first or second detection method is adopted, it is necessary to accurately draw lines and mark the positions to be tested in the concrete, which affects the detection efficiency. At the same time, the accuracy of the drawn lines cannot be guaranteed, thus affecting the detection accuracy, which needs to be improved. Summary of the invention

[0006] In view of the deficiencies in the prior art, an object of the present invention is to provide a concrete crack detection device, which has the effect of improving detection efficiency and detection accuracy.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions: A concrete crack detection device, comprising: A detector, used to display the test value; A pair of detection probes connected to the detector and used to contact the concrete building surface to be tested; A positioner, used to lean against the concrete building surface to be tested and limit the position of the detection probe; The positioner comprises a support seat and a pair of cross bars, wherein the pair of cross bars are rotatably connected to two ends of the support seat respectively, and notches for embedding the detection probe are respectively arranged on the upper side and the lower side of the cross bars.

[0008] In a preferred example, the present invention can be further configured as follows: a through hole is provided in the middle position of the support seat, a sliding rod is obliquely provided in the through hole, an insert for embedding in the crack is provided on the sliding rod, the upper end of the sliding rod is rotatably connected to the inner wall of the through hole, and a torsion spring is provided at the rotation position, and a driving mechanism for controlling the rotation of the sliding rod is provided on the support seat.

[0009] In a preferred example, the present invention can be further configured as follows: the driving mechanism includes a driving block and a sliding block, the driving block is vertically slidably connected to the support seat, the sliding block is connected to the driving block, and the side that contacts the sliding rod is inclined.

[0010] In a preferred example, the present invention can be further configured as follows: a locking plate that abuts against the surface of the support seat is bent at the upper end of the slider, a clamping block is provided on the locking plate, a clamping tooth for the clamping block to be clamped and embedded is provided on the support seat, and a handle is bent on the locking plate.

[0011] In a preferred example, the present invention can be further configured as follows: one end of the cross bar close to the support seat is horizontally slidably connected with an insertion rod, and the support seat is provided with a slot for the insertion rod to be inserted.

[0012] In a preferred example, the present invention can be further configured as follows: a fixing rod is provided at the end of one of the cross bars, a pair of clamping plates for clamping the outer wall of the other cross bar is provided on the outer wall of the fixing rod, and a fixing groove for the fixing rod to be embedded is provided on the other cross bar.

[0013] In a preferred example, the present invention can be further configured as follows: the inner side walls on both sides of the cross bar are provided with a receiving groove, a pad is embedded in the receiving groove, one side of the pad is provided with an adhesive for adhering to the surface of the concrete building, and the cross bar is provided with a fixing piece for fixing the pad.

[0014] In a preferred example, the present invention can be further configured as follows: the fixing member includes a piston and a screw, cavities are provided at both ends of the cross bar, a negative pressure hole connected to the cavity is provided in the accommodating groove, the piston is slidably connected to the cavity, the screw is threadedly connected to the cross bar, and is rotatably connected to the piston.

[0015] In a preferred example, the present invention can be further configured as follows: a waist belt is provided on the detector.

[0016] In summary, the present invention has the following beneficial effects: 1. By setting up a foldable locator, the locator can be quickly placed at the concrete testing position to achieve rapid and accurate positioning of the detection probe. No matter whether cross-seam or non-cross-seam detection is used, no line marking is required, making the detection process more convenient, improving detection efficiency, and ensuring detection accuracy; 2. By setting a plug plate that can be flipped out and embedded in the crack, the entire locator can be fixed in position, making the detection process more convenient and accurate; 3. By sticking the locator on the concrete to be tested, there is no need to hold the locator all the time, ensuring the accuracy of positioning. At the same time, one person can complete the test, improving the convenience and efficiency of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment; Figure 2 is a schematic structural diagram of a positioner in an embodiment; Figure 3 is a schematic diagram of the connection relationship of the positioner of the embodiment; Figure 4 is a schematic diagram of the internal structure of the support base of the embodiment; Figure 5 is a schematic structural diagram of a driving mechanism of an embodiment; Figure 6 Schematic diagram of the internal structure of the cross bar of the embodiment.

[0018] Figure numerals: 1. detector; 11. belt; 2. detection probe; 3. positioner; 31. support seat; 32. cross bar; 33. plug rod; 34. slot; 35. notch; 36. fixing rod; 37. splint; 38. fixing groove; 4. through hole; 41. sliding rod; 42. insert; 43. torsion spring; 5. driving mechanism; 51. driving block; 52. slider; 53. locking plate; 54. block; 55. tooth; 56. handle; 6. receiving groove; 61. pad; 62. adhesive; 7. fixing piece; 71. piston; 72. screw; 73. cavity; 74. negative pressure hole. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0020] like Figure 1 As shown, a concrete crack detection device includes a detector 1, a pair of detection probes 2 and a locator 3.

[0021] like Figure 1As shown, the detector 1 is used to display the detection value, and a belt 11 is provided on the detector 1 to fix the detector 1 at the waist position, freeing both hands for detection work. A pair of detection probes 2 are connected to the detector 1 and are used to contact the concrete building surface to be tested.

[0022] like Figure 2 , Figure 3 As shown, the positioner 3 is used to lean on the concrete building surface to be tested and limit the position of the detection probe 2. The positioner 3 includes a support seat 31 and a pair of cross bars 32, the pair of cross bars 32 are rotatably connected to the two ends of the support seat 31, and the ends of the cross bars 32 close to the support seat 31 are horizontally slidably connected with the plug rod 33, and the support seat 31 is provided with a slot 34 for the plug rod 33 to be inserted.

[0023] like Figure 2 , Figure 3 As shown, the upper and lower sides of the crossbar 32 are respectively provided with notches 35 for the detection probe 2 to be embedded. There are three notches 35 on the lower side, which are 50mm, 75mm and 100mm away from the center of the crossbar support seat 31, respectively, to meet the cross-seam detection requirements. There are four notches 35 on the upper side, one of which is at the end of the crossbar 32, and the other notches 35 are 100mm, 150mm and 200mm away from the first notch 35, respectively, to meet the non-cross-seam detection requirements.

[0024] like Figure 2 , Figure 3 As shown, a fixing rod 36 is disposed at the end of one of the cross bars 32 , and a pair of clamping plates 37 for clamping the outer wall of the other cross bar 32 are disposed on the outer wall of the fixing rod 36 , and a fixing groove 38 for the fixing rod 36 to be embedded is disposed on the other cross bar 32 .

[0025] When cracks in a concrete building need to be inspected, the fixing rod 36 is controlled to flip outward so that the fixing rod 36 flips out of the fixing slot 38 to unlock the cross bar 32. Then the cross bar 32 can be controlled to flip so that the cross bar 32 and the support seat 31 are in a straight line.

[0026] Then, the insertion rod 33 on the cross bar 32 is controlled to slide horizontally and inserted into the slot 34 to achieve the limit fixation between the cross bar 32 and the support seat 31, and finally the entire positioner 3 is placed against the concrete building surface.

[0027] If cross-crack detection is used, the middle position of the support seat 31 is selected to align with the crack, and then the notches 35 on the lower side of the crossbar 32 are used to respectively embed the detection probes 2 into different notches 35 to achieve positioning of a pair of detection probes 2.

[0028] If non-cross-crack detection is used, the end positions of the support seat 31 close to each other are selected according to needs to align with the crack, and then the notches 35 on the upper side of the cross bar 32 are used to make the detection probes 2 respectively embedded in different notches 35 to achieve the positioning of a pair of detection probes 2.

[0029] Therefore, by setting a foldable and retractable locator 3, the locator 3 can be quickly placed at the concrete position to be detected, and the detection probe 2 can be quickly and accurately located. No matter whether cross-seam or non-cross-seam detection is adopted, no line marking is required, which makes the detection process more convenient, improves the detection efficiency, and ensures the detection accuracy. At the same time, during the detection process, cross-seam and non-cross-seam joint detection can be performed around the crack, that is, both measurement methods are used, and then the detected data is analyzed to ensure the detection accuracy.

[0030] like Figure 2 , Figure 4 As shown, a through hole 4 is provided through the support seat 31, and the through hole 4 is located at the middle position of the support seat 31. A sliding rod 41 is provided obliquely in the through hole 4, and a plug 42 for embedding into the crack is provided on the sliding rod 41. The upper end of the sliding rod 41 is rotatably connected to the inner wall of the through hole 4, and a torsion spring 43 is provided at the rotation position.

[0031] like Figure 4 , Figure 5 As shown, a driving mechanism 5 for controlling the rotation of the sliding rod 41 is provided on the support seat 31. The driving mechanism 5 includes a driving block 51 and a sliding block 52. The driving block 51 is vertically slidably connected to the support seat 31. The sliding block 52 is connected to the driving block 51 and is inclined on one side that contacts the sliding rod 41.

[0032] like Figure 4 , Figure 5 As shown, the upper end of the slider 52 is bent to form a locking plate 53 that abuts against the surface of the support seat 31, and a clamping block 54 is provided on the locking plate 53. The support seat 31 is provided with a clamping tooth 55 for the clamping block 54 to be clamped and embedded, and a handle 56 is bent on the locking plate 53.

[0033] When cross-gap detection or non-cross-gap detection is adopted, the driving block 51 is controlled to slide vertically. At this time, the handle 56 is pressed so that the handle 56 drives the locking plate 53 to tilt upward, and the block 54 on the locking plate 53 is disengaged from the tooth 55, so that the driving block 51 can drive the slider 52 to slide smoothly.

[0034] During the sliding process of the slider 52, the slider 52 presses the sliding rod 41 to flip outward, and the sliding rod 41 drives the insert 42 to move synchronously, and the insert 42 is located outside the through hole 4 and can be inserted into the crack, thereby realizing the limiting fixation of the entire locator 3, making the detection process more convenient and accurate.

[0035] When the position of the insert 42 is fixed, the handle 56 is released, and the locking plate 53 is reset in the opposite direction, and the clamping block 54 is clamped with the clamping teeth 55 to fix the driving block 51, thereby indirectly positioning the insert 42 and ensuring the stability of the positioner 3 during operation. The storage process of the insert 42 is the opposite, and will not be described in detail.

[0036] like Figure 2 , Figure 6 As shown, the inner side walls on both sides of the cross bar 32 are provided with a receiving groove 6, a pad 61 is embedded in the receiving groove 6, and an adhesive 62 is provided on one side of the pad 61 to be adhered to the concrete building surface, and a fixing piece 7 for fixing the pad 61 is provided on the cross bar 32.

[0037] like Figure 6 As shown, the fixing member 7 includes a piston 71 and a screw 72, a cavity 73 is provided at both ends of the cross bar 32, and a negative pressure hole 74 connected to the cavity 73 is provided in the receiving groove 6. The piston 71 is slidably connected to the cavity 73, and the screw 72 is threadedly connected to the cross bar 32 and rotatably connected to the piston 71.

[0038] When the positioner 3 needs to be fixed, the pad 61 can be placed in the receiving groove 6 with the side with the adhesive 62 facing outward, and then the screw 72 is controlled to rotate so that the screw 72 drives the piston 71 to slide and generate negative pressure in the cavity 73 to achieve adsorption and fixation of the pad 61.

[0039] Therefore, when the locator 3 is against the concrete building surface, the two ends of the cross bar 32 can be pressed, and the locator 3 can be bonded and fixed to the concrete building surface using the adhesive 62 to fix the locator 3. There is no need to support the locator 3 all the time, ensuring the accuracy of positioning. At the same time, a single person can complete the detection, thereby improving the convenience and efficiency of detection.

[0040] When the positioner 3 needs to be removed, the screw 72 is controlled to rotate in the opposite direction, so that the screw 72 drives the piston 71 to slide in the opposite direction, and the negative pressure in the cavity 73 is released, so that the locking of the pad 61 is released. Then the positioner 3 can be removed from the concrete building surface, and the positioner 3 can be removed.

[0041] The pad 61 can then be used as a consumable material and left on the surface of the concrete building, and can be used as a mark to indicate that the position has been inspected. The pad 61 can also be scraped off the surface of the concrete building and discarded to avoid affecting the appearance of the concrete building surface.

[0042] The specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, such modifications are protected by the patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A concrete crack detection device, characterized in that: include: A detector (1), used for displaying the detected value; A pair of detection probes (2) connected to the detection instrument (1) and used to contact the concrete building surface to be detected; A positioner (3) is used to lean against the concrete building surface to be tested and to limit the position of the detection probe (2); The positioner (3) comprises a support seat (31) and a pair of cross bars (32), wherein the pair of cross bars (32) are rotatably connected to the two ends of the support seat (31), and the upper and lower sides of the cross bars (32) are respectively provided with notches (35) for the detection probe (2) to be embedded.

2. A concrete crack detection device according to claim 1, characterized in that: A through hole (4) is provided in the middle of the support seat (31), a sliding rod (41) is obliquely provided in the through hole (4), an insert (42) for embedding into the crack is provided on the sliding rod (41), the upper end of the sliding rod (41) is rotatably connected to the inner wall of the through hole (4), and a torsion spring (43) is provided at the rotation position, and a driving mechanism (5) for controlling the rotation of the sliding rod (41) is provided on the support seat (31).

3. A concrete crack detection device according to claim 2, characterized in that: The driving mechanism (5) comprises a driving block (51) and a sliding block (52); the driving block (51) is vertically slidably connected to the supporting seat (31); the sliding block (52) is connected to the driving block (51) and is arranged in an inclined surface on one side that contacts the sliding rod (41).

4. A concrete crack detection device according to claim 3, characterized in that: A locking plate (53) is bent at the upper end of the sliding block (52) and abuts against the surface of the supporting seat (31); a clamping block (54) is arranged on the locking plate (53); a clamping tooth (55) for the clamping block (54) to be clamped and embedded is arranged on the supporting seat (31); and a handle (56) is bent on the locking plate (53).

5. A concrete crack detection device according to claim 1, characterized in that: One end of the cross bar (32) close to the support seat (31) is horizontally slidably connected to an insertion rod (33), and a slot (34) for the insertion rod (33) to be inserted is provided on the support seat (31).

6. A concrete crack detection device according to claim 1, characterized in that: A fixing rod (36) is provided at the end of one of the cross bars (32), and a pair of clamping plates (37) for clamping the outer wall of the other cross bar (32) are provided on the outer wall of the fixing rod (36), and a fixing groove (38) for the fixing rod (36) to be embedded is provided on the other cross bar (32).

7. A concrete crack detection device according to claim 1, characterized in that: The inner side walls on both sides of the cross bar (32) are provided with a receiving groove (6), a pad (61) is embedded in the receiving groove (6), one side of the pad (61) is provided with an adhesive (62) for adhering to the surface of the concrete building, and a fixing piece (7) for fixing the pad (61) is provided on the cross bar (32).

8. A concrete crack detection device according to claim 7, characterized in that: The fixing member (7) comprises a piston (71) and a screw rod (72), cavities (73) are provided at both ends of the cross rod (32), a negative pressure hole (74) communicating with the cavity (73) is provided in the receiving groove (6), the piston (71) is slidably connected to the cavity (73), the screw rod (72) is threadedly connected to the cross rod (32), and is rotatably connected to the piston (71).

9. A concrete crack detection device according to claim 1, characterized in that: The detector (1) is provided with a waist belt (11).

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