High-precision crack measuring device

Abstract

The utility model belongs to the technical field of surveying and mapping equipment, and discloses a high-precision crack measuring device which comprises a base, a flat plate, a main graduated scale, a horizontal sliding plate, a measuring needle and a leveling unit, the flat plate is rotatably installed on the base, the main graduated scale is fixedly installed on the front face of the flat plate, and the horizontal sliding plate is slidably installed on the top face of the flat plate. The probe is connected with the horizontal sliding plate and can synchronously slide along with the horizontal sliding plate, and the leveling unit is used for adjusting the flat plate to be in a horizontal state. According to the utility model, the whole device can be leveled by matching the leveling screw with the pipe bubble and the round bubble, the device can be ensured to be in a horizontal state when facing an uneven ground, and meanwhile, the probe can be lifted and adjusted to be close to the surface of a crack, so that the measurement result can be ensured to be more accurate.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering safety monitoring, and in particular relates to a high-precision crack measuring device. Background Art

[0002] At present, steel tape measures or feeler gauges are usually used for crack measurement. Steel tape measures are usually used for crack measurement or monitoring with high precision requirements, while feeler gauges are used for crack measurement or monitoring with high precision. However, there are errors in the above two instruments and equipment for measuring or monitoring cracks. When the two sides of the crack are not on the same horizontal plane or the crack is too narrow to be accurately measured, the above measuring instruments and equipment often cannot achieve their high-precision measurement or monitoring.

[0003] A patent document with publication number CN220583269U discloses "a hydraulic ring geological fracture measuring device", which includes a support frame, a scale is arranged on the bottom surface of the upper end of the support frame, a measuring rod is arranged on the bottom end of the scale, and adjustment devices are arranged at both ends of the support frame. The adjustment device includes a limit frame, and the inner wall of the limit frame is fixedly connected to the bottom arc surface of the support rod. The surface of the limit frame is slidably connected to the limit ring, and a limit groove is arranged on the inner wall of the limit ring corresponding to the position of the limit frame. The inner wall of the limit groove is slidably connected to the surface of the limit frame, and three connecting grooves are evenly arranged on the arc surface of the limit ring. The inner walls of the three connecting grooves are rotatably connected to the support rod. The bottom end of the support rod is in a pointed cone shape, and a rotating shaft is passed through the arc surface thread of the limit ring, and one end of the rotating shaft is in contact with the arc surface of the support rod.

[0004] The device moves the two sliding frames on the ruler to drive the measuring rod to move, so that the two measuring rods are aligned with the two sides of the crack, and the value on the ruler can be read as the measurement result. However, the device has certain limitations in actual use: when the ground is uneven, it is difficult to ensure that the device is in a horizontal state as a whole, so the measurement result will be biased and inaccurate. Utility Model Content

[0005] The utility model aims to provide a high-precision crack measuring device, which can adjust the height of the measuring needle and can also perform leveling processing on the device when facing an uneven bottom surface to ensure accurate results.

[0006] The technical solution adopted by the utility model is a high-precision crack measuring device, comprising a base, a plate, a main scale, a horizontal slide, a measuring needle and a leveling unit, the plate is rotatably mounted on the base, the main scale is fixedly mounted on the front surface of the plate, the horizontal slide is slidably mounted on the top surface of the plate, the measuring needle is connected to the horizontal slide and can slide synchronously with the horizontal slide, and the leveling unit is used to adjust the plate to a horizontal state.

[0007] Furthermore, a base sleeve is fixedly installed at the center of the base, a connecting rod is inserted into the base sleeve and the two are threadedly matched, and a flat plate sleeve is fixedly installed at the center of the bottom surface of the flat plate, and the flat plate sleeve is rotatably sleeved on the top of the connecting rod.

[0008] Furthermore, a rotation brake knob is inserted into the flat sleeve through threaded engagement, and the rotation brake knob can interfere with the connecting rod to limit the rotation of the flat sleeve relative to the connecting rod.

[0009] Furthermore, a secondary scale is provided on the horizontal slide, a protective cover is fixedly installed at the zero line of the secondary scale, a measuring piece is slidably installed in the protective cover, and the measuring needle is fixedly connected to the bottom end of the measuring piece.

[0010] Furthermore, a measuring piece brake knob is inserted into the protective cover through threaded engagement, and the measuring piece brake knob can interfere with the measuring piece and thereby limit the sliding of the measuring piece relative to the protective cover.

[0011] Furthermore, a horizontal brake knob is installed on the auxiliary scale, and the horizontal brake knob can interfere with the flat plate to limit the sliding of the horizontal slide relative to the flat plate.

[0012] Furthermore, the leveling unit comprises a tube bubble, a round bubble and a plurality of leveling screws, wherein the tube bubble and the round bubble are mounted on the top surface of the flat plate, and the leveling screws are at least three and are mounted in a circle on the bottom surface of the base.

[0013] The beneficial effects of the utility model are:

[0014] The utility model can level the entire device through the leveling screw in conjunction with the tube bubble and the round bubble, and can ensure that the device is in a horizontal state when the surface is uneven. At the same time, the measuring needle can be raised and lowered, and the measuring needle can be brought close to the crack surface, thus ensuring a more accurate measurement result. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a top view schematic diagram of the overall structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the measuring needle installation structure of the utility model;

[0018] Explanation of the accompanying reference numerals: 2. horizontal brake knob; 3. horizontal slide plate; 4. tube bubble; 6. flat plate; 7. round bubble; 8. rotation brake knob; 10. flat plate sleeve; 11. connecting rod; 13. measuring needle; 14. base sleeve; 15. base; 16. leveling screw; 18. main scale; 19. auxiliary scale; 21. measuring piece; 22. protective cover; 23. measuring piece brake knob. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model clearer and more understandable, the technical solution of the utility model will be further described in detail below with reference to the accompanying drawings.

[0020] like Figure 1 , Figure 2 , Figure 3 As shown, the utility model provides a high-precision crack measuring device, including a base 15, a plate 6, a main scale 18, a horizontal slide 3, a measuring needle 13 and a leveling unit. The plate 6 is rotatably mounted on the base 15, the main scale 18 is fixedly mounted on the front surface of the plate 6, the horizontal slide 3 is slidably mounted on the top surface of the plate 6, the measuring needle 13 is connected to the horizontal slide 3 and can slide synchronously with the horizontal slide 3, and the leveling unit is used to adjust the plate 6 to a horizontal state.

[0021] The flat plate 6 is rotatably mounted on the base 15. When in use, the flat plate 6 can be rotated so that the measuring needle 13 is directly above the crack, which is convenient for measurement. When encountering an uneven ground, the flat plate 6 can be adjusted to a horizontal state through a leveling unit. Because the measuring needle 13 is mounted on the horizontal slide 3 and slides synchronously with the horizontal slide 3, and the horizontal slide 3 is slidably mounted on the flat plate 6, the horizontal slide 3 can be adjusted so that the measuring needle is aligned with the two edges of the crack respectively, and then the measurement result can be determined by the reading on the main scale 18.

[0022] A base sleeve 14 is fixedly installed at the center of the base 15, and a connecting rod 11 is inserted into the base sleeve 14 and the two are threadedly matched. A flat sleeve 10 is fixedly installed at the center of the bottom surface of the flat plate 6, and the flat sleeve 10 is rotatably sleeved on the top of the connecting rod 11. A rotating brake knob 8 is inserted into the flat sleeve 10 through threaded matching, and the rotating brake knob 8 can interfere with the connecting rod 11 and thus limit the rotation of the flat sleeve 10 relative to the connecting rod 11.

[0023] The support of the base sleeve 14, the connecting rod 11 and the flat sleeve 10 can raise the height of the flat plate 6, making it convenient for the staff to operate and read the value of the main scale 18. And because the connecting rod 11 is inserted into the base sleeve 14 by threaded fitting, the connecting rod 11 can be disassembled relative to the base sleeve 14, which is convenient for the transportation and movement of the device.

[0024] The plate 6 can be moved by loosening the rotating brake knob 8 so that the plate 6 rotates relative to the connecting rod 11 , and the plate 6 is adjusted so that the main scale 18 is in the correct position for measurement, and then the rotating brake knob 8 is tightened.

[0025] A sub-scale 19 is provided on the horizontal slide 3, and a protective cover 22 is fixedly installed at the zero line of the sub-scale 19. A measuring piece 21 is slidably installed in the protective cover 22. The measuring needle 13 is fixedly connected to the bottom end of the measuring piece 21. A measuring piece brake knob 23 is inserted into the protective cover 22 through threaded cooperation. The measuring piece brake knob 23 can interfere with the measuring piece and thus limit the sliding of the measuring piece 21 relative to the protective cover 22. A horizontal brake knob 2 is installed on the sub-scale 19. The horizontal brake knob 2 can interfere with the flat plate 6 and thus limit the sliding of the horizontal slide 3 relative to the flat plate 6.

[0026] The measuring needle 13 is exactly at the zero mark of the auxiliary scale 19 , so the horizontal slide 3 needs to be adjusted before use so that the zero mark of the auxiliary scale 19 is aligned with the zero mark of the main scale 18 .

[0027] By loosening the measuring piece brake knob 23, the measuring piece 21 can be pushed to slide in the protective cover 22, so that the measuring needle 13 is close to the crack, which is convenient for the staff to align the measuring needle 13 with the crack. After the adjustment is completed, it is only necessary to tighten the measuring piece brake knob 23 again to fix the measuring piece 21.

[0028] By loosening the horizontal brake knob 2, the horizontal slide 3 can be pushed to slide, so that the measuring needle 13 moves from one edge of the crack to the other edge. Then the horizontal brake knob 2 needs to be tightened again to fix the horizontal slide 3. Finally, the value on the main scale 18 can be read to determine the measurement result.

[0029] The leveling unit includes a tube bubble 4 , a round bubble 7 and a plurality of leveling screws 16 . The tube bubble 4 and the round bubble 7 are mounted on the top surface of the flat plate 6 . There are at least three leveling screws 16 which are circularly mounted on the bottom surface of the base 15 .

[0030] The height of the side plate 6 can be adjusted by rotating the leveling screw 16 until the bubbles in the tube bubble 4 and the round bubble 7 are all in the center, thus ensuring that the plate is in a horizontal state.

[0031] The leveling screw 16 is a prior art, and its structure and principle are not described in detail here.

[0032] To sum up, the overall usage process of the utility model is as follows: first, move the device above the crack, then check whether the zero mark of the auxiliary scale 19 is aligned with the zero mark of the main scale 18. If not, adjust the horizontal slide 3 until it is aligned. After completion, loosen the rotating brake knob 8, rotate the plate 6 so that the main scale 18 is in the correct position, then tighten the rotating brake knob 8, and then adjust the leveling screw 16 until the bubbles in the tube bubble 4 and the circular bubble 7 are in the center state, then loosen the measuring piece brake knob 23, press the measuring piece 21 down, so that the measuring needle 13 moves down close to the crack, and then tighten the measuring piece brake knob 23, and then move the device so that the measuring needle 13 is facing one side edge of the crack, then loosen the horizontal brake knob 2, push the horizontal slide 3, so that the measuring needle 13 moves from one side of the crack to the edge of the other side of the crack, and then tighten the horizontal brake knob 2. The value on the main scale 18 is read as the result of the crack measurement.

[0033] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A high-precision crack measuring device, characterized in that: The utility model comprises a base, a plate, a main scale, a horizontal slide, a measuring needle and a leveling unit. The plate is rotatably mounted on the base, the main scale is fixedly mounted on the front surface of the plate, the horizontal slide is slidably mounted on the top surface of the plate, the measuring needle is connected to the horizontal slide and can slide synchronously with the horizontal slide, and the leveling unit is used for adjusting the plate to a horizontal state.

2. The high-precision crack measuring device according to claim 1, characterized in that: A base sleeve is fixedly installed at the center of the base, a connecting rod is inserted in the base sleeve and the two are threadedly matched, and a flat plate sleeve is fixedly installed at the center of the bottom surface of the flat plate, and the flat plate sleeve is rotatably sleeved on the top of the connecting rod.

3. The high-precision crack measuring device according to claim 2, characterized in that: A rotation brake knob is inserted into the flat sleeve through threaded engagement, and the rotation brake knob can interfere with the connecting rod to limit the rotation of the flat sleeve relative to the connecting rod.

4. The high-precision crack measuring device according to claim 1, characterized in that: The horizontal slide plate is provided with a secondary scale, a protective cover is fixedly installed at the zero mark of the secondary scale, a measuring piece is slidably installed in the protective cover, and the measuring needle is fixedly connected to the bottom end of the measuring piece.

5. The high-precision crack measuring device according to claim 4, characterized in that: A measuring piece brake knob is inserted into the protective cover through threaded cooperation, and the measuring piece brake knob can interfere with the measuring piece and thus limit the sliding of the measuring piece relative to the protective cover.

6. The high-precision crack measuring device according to claim 4, characterized in that: The auxiliary scale is provided with a horizontal brake knob, which can interfere with the flat plate and thus limit the sliding of the horizontal slide relative to the flat plate.

7. The high-precision crack measuring device according to claim 1, characterized in that: The leveling unit comprises a tube bubble, a round bubble and a plurality of leveling screws. The tube bubble and the round bubble are arranged on the top surface of the flat plate. There are at least three leveling screws which are arranged in a circle on the bottom surface of the base.

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