Crack depth finder convenient to adjust

Abstract

The utility model discloses a crack depth finder convenient to adjust, which relates to the technical field of concrete crack detection equipment and comprises a frame, a pair of L-shaped first through grooves are formed in the frame in a central symmetry manner, two pairs of grooves are formed in the frame and positioned on two sides of the pair of first through grooves, and the first through grooves and the second through grooves are arranged in the frame. Two pairs of grooves are formed in the base, two pairs of limiting strips are arranged in the two pairs of grooves in a sliding mode, a rack is arranged between each pair of limiting strips, a pair of moving blocks are arranged at the ends of a pair of racks, a pair of probes are arranged on a pair of moving blocks, and the pair of probes are connected with a host through signal lines; the threaded rod is limited through the limiting assemblies in the pair of second through grooves, and the positions of the limiting assemblies can be adjusted in advance, so that the threaded rod abuts against the limiting assemblies under the elastic force of the spring after the pair of probes finish measurement each time and when a worker loosens the nut, and then the distance between the pair of probes is rapidly adjusted. And the crack depth detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete crack detection equipment, in particular to a crack depth detector which is convenient to adjust. Background Technique

[0002] The detection of concrete cracks is usually carried out by using a crack depth detector. The test principle of this instrument is that when ultrasonic waves propagate in concrete and pass through a crack, diffraction occurs at the crack endpoints. There is a geometric relationship between the diffraction angle and the crack depth. The crack depth detector is based on the geometric relationship between the diffraction angle and the crack depth to obtain the crack depth.

[0003] When some existing crack depth detectors measure the depth of a crack, generally, two probes are pressed on both sides of the top of the crack, and a coupling agent is applied outside the probes. The coupling agent can exclude the air between the probes and the concrete surface, and then pressure is applied to the probes to enable ultrasonic waves to effectively enter the main machine connected to the probes, and the crack depth data is obtained.

[0004] However, when measuring the crack depth, it is necessary to adjust the different distances between a pair of probes for multiple measurements. Moreover, after a single measurement by the current crack detector, the positions of a pair of probes cannot be quickly adjusted, resulting in low detection efficiency. Therefore, a crack depth detector which is convenient to adjust is urgently needed to be developed. Content of the Utility Model

[0005] Aiming at the above deficiencies of the prior art, the utility model provides a crack depth detector which is convenient to adjust. The position of a threaded rod is limited by a limiting component in a pair of second through grooves, and the position of the limiting component can be adjusted in advance. When a person loosens the nut after each measurement of a pair of probes, under the elastic force of a spring, the threaded rod abuts against the limiting component, so as to quickly adjust the distance between a pair of probes and improve the efficiency of detecting the crack depth.

[0006] To achieve the above objectives, the present utility model is realized through the following technical solutions: A crack depth detector that is convenient to adjust, comprising a frame. A pair of L-shaped first through grooves are symmetrically opened at the center inside the frame. Two pairs of grooves are opened inside the frame and on both sides of the pair of first through grooves. Two pairs of limiting strips are slidably arranged in the two pairs of grooves. A rack is arranged between each pair of limiting strips. A pair of moving blocks are arranged at the ends of the pair of racks. A pair of probes are arranged on the pair of moving blocks. The pair of probes are connected to a host through signal lines. A pair of connecting plates are arranged at the middle position of the frame. A rotating shaft is rotatably arranged on the pair of connecting plates. A gear is arranged on the rotating shaft and between the pair of connecting plates. The gear is meshed and connected with the pair of racks. A threaded rod is arranged on one of the moving blocks. The part of the threaded rod that penetrates through the first through groove and is outside the frame is threadedly connected with a nut. The frame is provided with a pair of second through grooves. A limiting component capable of limiting the threaded rod is arranged in the second through grooves. Scale lines are arranged at the positions corresponding to the second through grooves on the frame. A multi-stage telescopic rod is arranged between one of the moving blocks and the frame. A spring is sleeved on the multi-stage telescopic rod.

[0007] Preferably, the limiting component includes a moving strip, a pair of clamping blocks, an inserting block and a locking bolt. The moving strip is slidably arranged in the pair of second through grooves. The pair of clamping blocks are oppositely arranged on both sides of the moving strip and are slidably arranged in the first through grooves. A slot is opened on the threaded rod. The inserting block is arranged on the moving strip and can be inserted into the slot. The locking bolt is threadedly connected with the moving strip and can limit the moving strip.

[0008] Preferably, a position indicating line is arranged on the moving block connected to the threaded rod.

[0009] The present utility model provides a crack depth detector that is convenient to adjust, having the following beneficial effects:

[0010] 1. The present utility model limits the threaded rod through the limiting component in the pair of second through grooves, and the position of the limiting component can be adjusted in advance. When the pair of probes finish each measurement and the operator loosens the nut, the threaded rod abuts against the limiting component under the elastic force of the spring, so as to quickly adjust the distance between the pair of probes and improve the efficiency of detecting the crack depth.

[0011] 2. When the inserting block is inserted into the slot, the position of the end of the inserting block can be aligned with the center position of the corresponding probe, so as to facilitate determining the position of the probe after the threaded rod abuts against the inserting block when adjusting the position of the inserting block. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a structural schematic diagram of the present utility model;

[0013] Figure 2Schematic diagram of the internal structure of the present utility model;

[0014] Figure 3 For the present utility model Figure 2 Enlarged view of part A in it.

[0015] In the figure: 1. Frame; 1-1. First through groove; 1-2. Groove; 1-3. Second through groove; 2. Connecting plate; 3. Rotating shaft; 4. Gear; 5. Rack; 5-1. Limiting strip; 6. Moving block; 7. Probe; 8. Position indicating line; 9. Threaded rod; 9-1. Slot; 10. Nut; 11. Multi-stage telescopic rod; 12. Spring; 13. Moving strip; 14. Block; 15. Insert block; 16. Locking bolt; 17. Scale line. Specific embodiments

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0017] Such as Figures 1-3As shown in the figure, a crack depth detector that is convenient to adjust includes a frame 1. A pair of L-shaped first through grooves 1-1 are symmetrically arranged at the center inside the frame 1. Two pairs of grooves 1-2 are arranged on both sides of the pair of first through grooves 1-1 inside the frame 1. Two pairs of limit strips 5-1 are slidably arranged in the two pairs of grooves 1-2. A rack 5 is arranged between each pair of limit strips 5-1. A pair of moving blocks 6 are arranged at the ends of the pair of racks 5. A pair of probes 7 are arranged on the pair of moving blocks 6. The pair of probes 7 are connected to the host through signal lines. A pair of connecting plates 2 are arranged at the middle position of the frame 1. A rotating shaft 3 is rotatably arranged on the pair of connecting plates 2. A gear 4 is arranged between the pair of connecting plates 2 on the rotating shaft 3. The gear 4 is meshed with the pair of racks 5. A threaded rod 9 is arranged on one of the moving blocks 6. The part of the threaded rod 9 that penetrates through the first through groove 1-1 and is located outside the frame 1 is threadedly connected with a nut 10. The frame 1 is provided with a pair of second through grooves 1-3. A limiting component capable of limiting the threaded rod 9 is arranged in the second through grooves 1-3. Scale lines 17 are arranged at the positions corresponding to the second through grooves 1-3 on the frame 1. A multi-stage telescopic rod 11 is arranged between one of the moving blocks 6 and the frame 1. A spring 12 is sleeved on the multi-stage telescopic rod 11. The limiting component includes a moving strip 13, a pair of clamping blocks 14, an inserting block 15 and a locking bolt 16. The moving strip 13 is slidably arranged in the pair of second through grooves 1-3. The pair of clamping blocks 14 are oppositely arranged on both sides of the moving strip 13 and are slidably arranged in the first through groove 1-1. A slot 9-1 is arranged on the threaded rod 9. The inserting block 15 is arranged on the moving strip 13 and can be inserted into the slot 9-1. The locking bolt 16 is threadedly connected with the moving strip 13 and can limit the moving strip 13. A position indicating line 8 is arranged on the moving block 6 connected to the threaded rod 9.

[0018] The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process, which are as follows:

[0019] According to the attached drawings of the specification Figures 1-3It can be seen that when the present utility model is in use, first, a pair of probes 7 are adjusted to the position of the maximum spacing to be measured: the personnel manually turn the threaded rod 9 to move the threaded rod 9 in the first through groove 1-1. When the threaded rod 9 moves, it drives the connected moving block 6 to move. The moving block 6 drives the connected rack 5 to move. The rack 5 drives a pair of limit bars 5-1 arranged thereon to slide in a pair of grooves 1-2. At the same time, the rack 5 drives the meshing-connected gear 4 to rotate. When the gear 4 rotates, it drives the other meshing-connected rack 5 to move. The other rack 5 drives the connected moving block 6 to move, so as to adjust the distance between the pair of moving blocks 6. When the pair of moving blocks 6 move, they drive the pair of probes 7 to move. When the moving block 6 connected to the threaded rod 9 moves, the multi-stage telescopic rod 11 can be contracted, and at the same time, the spring 12 sleeved on the multi-stage telescopic rod 11 is compressed. After the pair of probes 7 move to the maximum spacing to be measured, the position of the moving block 6 is fixed by screwing the nut 10 onto the threaded rod 9. Secondly, after applying the coupling agent to the pair of probes 7, the middle position of the frame 1 is aligned with the crack for measurement. During the measurement, the pair of probes input the signal into the host through the signal line. During the measurement, the position of the frame is kept stationary to move the limiting component in the second through groove 1-3 to the position where the next moving block 6 is to move. After the measurement at the maximum spacing is completed, the personnel loosen the nut 10. Under the elastic force of the spring 12, the moving block 6 can move, so that the threaded rod 9 abuts against the limiting component. The personnel fix the moving block 6 again through the nut 10, and then adjust the limiting component to the position where the next moving block 6 is to move. By repeating this way, the position of the pair of probes 7 can be quickly adjusted after each measurement; the present utility model limits the threaded rod 9 through the limiting components in a pair of second through grooves 1-3, and the position of the limiting components can be pre-adjusted. After each measurement of the pair of probes 7, when the personnel loosen the nut 10, under the elastic force of the spring 12, the threaded rod 9 abuts against the limiting components, so as to quickly adjust the spacing between the pair of probes 7 and improve the efficiency of detecting the depth of the crack.

[0020] There is a possible implementation. When the position of the insertion block 15 needs to be adjusted, the personnel turn the moving bar 13. The moving block 6 is slidably arranged in the second through groove 1-3, and the clamping blocks 14 on both sides of the moving bar 13 are slidably arranged in the first through groove 1-1, thereby preventing the moving bar 13 from disengaging from the second through groove 1-3. After the moving bar 13 is adjusted to the specified position, the moving bar 13 is fixed to the frame 1 through the locking bolt 16. The insertion block 15 can be inserted into the insertion slot 9-1. When the insertion block 15 is inserted into the insertion slot 9-1, the position of the end of the insertion block 15 can be aligned with the center position of the corresponding probe 7, so as to facilitate determining the position of the probe 7 after the threaded rod 9 abuts against the insertion block 15 when adjusting the position of the insertion block 15.

[0021] One possible implementation is that a position indicating line 8 is provided on the moving block 6 connected to the threaded rod 9, and the indicating line is used to indicate the distance of the probe 7 from the middle position of the frame 1.

[0022] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crack depth meter that is easy to adjust, comprising a frame (1), characterized in that: A pair of L-shaped first through grooves (1-1) are symmetrically provided in the center of the frame (1); two pairs of grooves (1-2) are provided in the frame (1) and are located on both sides of the pair of first through grooves (1-1); two pairs of limit bars (5-1) are slidably provided in the two pairs of grooves (1-2); a rack (5) is provided between each pair of limit bars (5-1); a pair of moving blocks (6) are provided at the ends of the pair of racks (5); a pair of probes (7) are provided on the pair of moving blocks (6); the pair of probes (7) are connected to the host through signal lines; a pair of connecting plates (2) are provided in the middle of the frame (1); a rotating shaft (3) is rotatably provided on the pair of connecting plates (2); a pair of connecting shafts (3) are provided on the rotating shaft (3) and are located at a pair of connecting shafts (3); A gear (4) is arranged between the connecting plates (2), and the gear (4) is meshedly connected with a pair of racks (5). A threaded rod (9) is arranged on one of the moving blocks (6), and the threaded rod (9) passes through the first through slot (1-1) and the portion located outside the frame (1) is threadedly connected with a nut (10). The frame (1) is provided with a pair of second through slots (1-3), and a limiting assembly capable of limiting the threaded rod (9) is arranged in the second through slots (1-3). A scale line (17) is arranged at a position corresponding to the second through slots (1-3) on the frame (1), and a multi-stage telescopic rod (11) is arranged between one of the moving blocks (6) and the frame (1), and a spring (12) is sleeved on the multi-stage telescopic rod (11).

2. The easily adjustable crack depth meter according to claim 1, characterized in that: The limiting assembly comprises a moving bar (13), a pair of clamping blocks (14), an inserting block (15) and a locking bolt (16); the moving bar (13) is slidably arranged in a pair of second through grooves (1-3); the pair of clamping blocks (14) are relatively arranged on both sides of the moving bar (13) and are slidably arranged in the first through groove (1-1); a slot (9-1) is provided on the threaded rod (9); the inserting block (15) is arranged on the moving bar (13) and can be inserted into the slot (9-1); and the locking bolt (16) is threadedly connected to the moving bar (13) and can limit the moving bar (13).

3. The easily adjustable crack depth meter according to claim 1, characterized in that: A position indicating line (8) is provided on the moving block (6) connected to the threaded rod (9).

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