Road and bridge crack detection device

Abstract

The utility model provides a road bridge crack detection device, including detection host, two transducer and equidistant adjustment mechanism, equidistant adjustment mechanism includes two tip seat, screw, linear guide rail and four slip mechanism, the both ends of screw are rotatingly installed on the two tip seat, the linear guide rail is installed on the tip seat, and the slip mechanism is installed on the linear guide rail. Two sections of threads with single pitch are arranged in the middle of the screw rod, two sections of threads with double pitch are respectively arranged at two ends of the screw rod, and the rotation directions of the threads on two sides of the screw rod are opposite by taking the center as a boundary; the two ends of the linear guide rail are fixed to the two end bases, the four sliding mechanisms are arranged on the linear guide rail in a sliding mode, the four sliding mechanisms are installed on the two single-pitch threads and the two double-pitch threads in a penetrating mode through nuts in a one-to-one correspondence mode, clamping rings are arranged on the four sliding mechanisms, and the axial direction of the clamping rings is perpendicular to the motion plane of the sliding mechanisms. The road and bridge crack detection device has the advantages that the design is scientific, the transducer is not easy to deviate, the detection position can be flexibly adjusted, and the use is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to road and bridge safety detection technical field, specifically speaking, relate to a road and bridge crack detection device. BACKGROUND

[0002] Road and bridge crack detection is an important link of ensuring road and bridge structure safety, and its core target is early crack detection and hazard evaluation, so as to make maintenance and reinforcement scheme. The ultrasonic crack depth detector is a common equipment for detecting crack depth, and its working principle is to calculate crack depth by using time difference of ultrasonic wave propagation in material. The ultrasonic crack depth detector mainly comprises a detection host, two transducers and a scale, a control panel is arranged on the detection host, the two transducers are used for emitting and receiving ultrasonic waves, and the scale is used for drawing a plurality of pairs of detection positions on both sides of the crack.

[0003] In the prior art, some detectors adopt simple scales such as tape measure, ruler and flexible ruler to measure distance, and mark center point in the center of detection position, but since the transducer covers the center point, it is inconvenient to observe, and the transducer position is prone to deviation. Some detectors adopt scales with semicircular grooves or circular grooves, so that circular arc or circular ring can be drawn on the detection position, and it is convenient to align with the edge of the transducer. The position of the transducer is generally accurate, but the semicircular groove or the circular groove is a fixed structure, so that the detection position drawn each time is fixed and cannot be flexibly adjusted to the distance of the crack.

[0004] In order to solve the above problems, people have been seeking an ideal technical solution. SUMMARY

[0005] The utility model discloses a kind of road and bridge crack detection devices for the deficiencies of prior art, to provide a kind of design scientific, transducer is not easy to deviate, detection position can be flexibly adjusted, convenient to use.

[0006] In order to achieve the above object, the utility model adopts the technical scheme: a road and bridge crack detection device, including detection host, two transducers and equidistance adjusting mechanism, the equidistance adjusting mechanism includes two end head seats, screw rod, linear guide and four slip mechanisms, both ends of the screw rod are rotatably installed on two the end head seats, the middle of the screw rod is provided with two single pitch threads, both ends are provided with a double pitch thread, the center is the boundary, the thread rotation direction of both sides of the screw rod is opposite; The linear guide is fixed on both ends of the two end head seats, four The slip mechanisms are all slidably arranged on the linear guide, four The slip mechanisms are all through the nut correspondingly and arranged on two single pitch threads and two double pitch threads, four The slip mechanisms are all provided with snap rings for clamping the transducer, the axial direction of the snap ring is perpendicular to the movement plane of the slip mechanism.

[0007] Beneficial effect: the center of the screw rod is aligned with the crack, because the screw rod is provided with two single pitch threads in the middle and two double pitch threads at both ends, when the screw rod is rotated, the middle two slip mechanisms can be driven to move away from / close to the crack at one time, the end two slip mechanisms can be driven to move away from / close to the crack at two times, the variable distance of the middle slip mechanism to the crack is equal to the variable distance of the end slip mechanism to the adjacent slip mechanism, which is the same as the conventional method of determining the detection position, then, the circular ring can be drawn under the guidance of the snap ring, the equidistance adjusting mechanism is removed, and the transducer is pressed on the circular ring for detection, or the equidistance adjusting mechanism is not removed, and the transducer is clamped in the snap ring for detection.

[0008] Based on the above, one end of the screw rod is connected with a driving handle.

[0009] Beneficial effect: it is convenient to rotate the screw rod.

[0010] Based on the above, the linear guide is provided with scale lines.

[0011] Beneficial effect: it is convenient to observe the distance value of each slip mechanism to the crack.

[0012] Based on the above, the linear guide is provided with a needle for inserting into the crack.

[0013] Beneficial effect: it is convenient to center the equidistance adjusting mechanism with the crack.

[0014] Based on the above, two The end head seats are provided with elastic pads on the side in contact with the detected member.

[0015] Beneficial effect: the two end head seats are better matched with the detected surface, and the connection is more stable. ACCURACY

[0016] Fig. 1 This is a schematic diagram of the structure of the road and bridge crack detection device of this utility model.

[0017] Fig. 2 This is a schematic diagram of the structure of the end cap of this utility model that contacts the testing piece.

[0018] Fig. 3 This is a schematic diagram of the structure of the insert pin in this utility model.

[0019] In the diagram: 1. Detector; 2. Transducer; 3. End seat; 4. Screw; 5. Linear guide rail; 6. Sliding mechanism; 7. Snap ring; 8. Nut; 9. Drive handle; 10. Pin; 11. Elastic pad; 41. Single pitch thread; 42. Double pitch thread. Detailed Implementation

[0020] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0021] like Figs. 1-3 As shown, a road and bridge crack detection device includes a detection host 1, two transducers 2, and an equidistant adjustment mechanism. The equidistant adjustment mechanism includes two end seats 3, a screw 4, a linear guide rail 5, and four sliding mechanisms 6. The two ends of the screw 4 are rotatably mounted on the two end seats 3, specifically using bearings for mounting. The screw 4 has two single-pitch threads 41 in the middle and a double-pitch thread 42 at each end (the pitch of the double-pitch thread 42 is twice the pitch of the single-pitch thread 41). With the center as the boundary (separated left and right in the figure), the rotation directions of the threads on both sides of the screw 4 are opposite.

[0022] The linear guide rail 5 is fixed at both ends to the two end seats 3. Four sliding mechanisms 6 are slidably mounted on the linear guide rail 5. Each of the four sliding mechanisms 6 is correspondingly threaded through two single-pitch threads 41 and two double-pitch threads 42 via nuts 8. The linear guide rail 5 has graduations for observing the distance from each sliding mechanism 6 to the crack. A pin 10 for insertion into the crack is located in the center of the linear guide rail 5, facilitating the alignment of the equidistant adjustment mechanism with the crack.

[0023] One end of the screw 4 is connected to a drive handle 9. When the drive handle 9 drives the screw 4 to rotate, the screw 4 will drive the two middle sliding mechanisms 6 to move away from / approach the center at one time, and drive the two end sliding mechanisms 6 to move away from / approach the center at twice the speed. In this way, the change distance of the middle sliding mechanism 6 to the crack and the change distance of the end sliding mechanism 6 to the adjacent sliding mechanism 6 will remain equal.

[0024] Four said slip mechanism 6 are provided with a snap ring 7 for clamping the transducer 2, the axial of the snap ring 7 is perpendicular to the movement plane of the slip mechanism 6. Different working modes can be selected according to different working conditions during detection, for example, when detecting the crack depth of the road surface or bridge surface, the equidistance adjusting mechanism can not be removed, the transducer 2 is clamped into the snap ring 7 for detection, when detecting the crack depth of the bridge side, the snap ring 7 can be used to draw a circular ring on both sides of the crack, and then the equidistance adjusting mechanism is removed, and the transducer 3 is pressed on the circular ring for detection.

[0025] In specific use, the two end head bases 3 are abutted against the surface of the detection object, the probe pin 10 is inserted into the crack to be detected, and then the screw rod 4 is driven to rotate by the driving handle 9, the middle two slip mechanisms 6 are driven to move away from / close to the crack at a speed of one time, and the end two slip mechanisms 6 are driven to move away from / close to the crack at a speed of two times, so that the variable distance of the middle slip mechanism 6 to the crack is equal to the variable distance of the end slip mechanism 6 to the adjacent slip mechanism 6, which is the same as the conventional method of determining the detection position, and then different working modes are selected according to different working conditions, for example, when detecting the crack depth of the road surface or bridge surface, the equidistance adjusting mechanism can not be removed, and the transducer 2 is clamped into the snap ring 7 for detection, when detecting the crack depth of the bridge side, the snap ring 7 can be used to draw a circular ring on both sides of the crack, and then the equidistance adjusting mechanism is removed, and the transducer 3 is pressed on the circular ring for detection.

[0026] In order to make the end head base 3 better fit the surface to be detected, the two end head bases 3 are provided with elastic pads 11 on the side in contact with the detected member; during use, the elastic pads 11 are slightly deformed and tightly abut against the detected member.

[0027] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application and not to limit them; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range of the present application claimed.

Claims

1. A road and bridge crack detection device, comprising a detection main unit and two transducers, characterized in that: It also includes an equidistant adjustment mechanism, which comprises two end seats, a screw, a linear guide rail, and four sliding mechanisms. The two ends of the screw are rotatably mounted on the two end seats. The screw has two single-pitch threads in the middle and a double-pitch thread at each end. The threads on both sides of the screw rotate in opposite directions with the center as the boundary. The two ends of the linear guide rail are fixed to the two end seats. The four sliding mechanisms are all slidably mounted on the linear guide rail. The four sliding mechanisms are each fitted onto the two single-pitch threads and the two double-pitch threads by nuts. Each of the four sliding mechanisms is provided with a retaining ring for clamping the transducer. The axis of the retaining ring is perpendicular to the movement plane of the sliding mechanism.

2. The road and bridge crack detection device according to claim 1, characterized in that: One end of the screw is connected to a drive handle.

3. The road and bridge crack detection device according to claim 2, characterized in that: The linear guide rail is provided with scale lines.

4. The road and bridge crack detection device according to any one of claims 1-3, characterized in that: The linear guide rail has a pin in the middle for insertion into the crack.

5. The road and bridge crack detection device according to claim 4, characterized in that: Both end seats have elastic pads on the side that contacts the test piece.

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