A device for detecting the height difference of bridge road expansion joints
By designing a bridge and pavement expansion joint height difference detection device with a stretchable expansion plate and foldable structure, the problems of poor adaptability and cumbersome operation of traditional devices have been solved. This device enables flexible measurement and convenient storage of expansion joints of different widths, improving the accuracy and stability of the measurement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- INNER MONGOLIA YUTIAN CONSTR GRP CO LTD
- Filing Date
- 2025-09-19
- Publication Date
- 2026-06-30
AI Technical Summary
Traditional bridge expansion joint height difference detection devices are difficult to adapt to expansion joints of different widths, and are cumbersome to operate and inconvenient to store.
A bridge pavement expansion joint height difference detection device was designed. The lateral movement distance of the movable probe is increased by pulling the telescopic plate outward, and the device's flexibility and portability are achieved through a rotating shaft and folding structure. The stability and accuracy of the measurement are improved by combining a digital display screen and a magnetic fixing structure.
It enables flexible and adaptable measurement of expansion joints of different widths, simplifies the operation process, facilitates storage, and improves the accuracy and stability of measurement.
Smart Images
Figure CN224435399U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an expansion joint height difference detection device, specifically a bridge pavement expansion joint height difference detection device, belonging to the technical field of expansion joint height difference detection devices. Background Technology
[0002] Bridge expansion joints are gaps designed to release the deformation of the bridge structure caused by temperature, load, and settlement. The smoothness of the road surface on both sides of the expansion joint directly affects driving safety and comfort. Therefore, an expansion joint elevation difference detection device is often used to measure the elevation difference between the two sides of the bridge road surface at the expansion joint, providing key data support for bridge maintenance, defect diagnosis, and safety assessment.
[0003] However, traditional detection devices mainly measure elevation differences by closely fitting the fixed reference movable probe of the ruler to the road surface on one side of the expansion joint, then sliding the movable probe to the other side of the road surface and moving it up and down. However, since the sizes of expansion joints on different bridges are not the same, and the range of movement of the sliding movable probe is constant, it is difficult to measure accurately when the size of the expansion joint is large. In addition, the operation process is cumbersome, and the overall size of the detection device is large and inconvenient to store. Utility Model Content
[0004] The purpose of this invention is to provide a bridge pavement expansion joint height difference detection device to solve the above problems. By pulling the telescopic plate outward, the lateral movement distance of the movable probe can be increased, thus making it easy to adapt to expansion joints of different widths. It is highly flexible, and the telescopic plate can rotate around the pivot, making it easy to store.
[0005] This utility model achieves the above-mentioned objective through the following technical solution: a bridge pavement expansion joint height difference detection device, comprising a ruler body, a measuring structure provided on the ruler body, the measuring structure including a slide block, the slide block being slidably connected to the ruler body, a folding structure connected to the slide block, the folding structure including a rotating seat, the bottom of the slide block being fixedly connected to the rotating seat, the rotating seat being fixedly connected to the rotating shaft, the rotating shaft being rotatably connected to the rotating block, the rotating block being provided with a telescopic structure, the telescopic structure including a slide rod, the rotating block being fixedly connected to the slide rod, the slide rod being slidably connected to a telescopic plate, the slide rod being provided with multiple insertion holes, the bottom of the telescopic plate being slidably connected to a pin, the pin engaging with adjacent insertion holes, the telescopic plate being provided with a slot, and the top of the slide block being threadedly connected to a knob.
[0006] Preferably, a torsion spring is fixedly connected between one end of the rotating shaft and the rotating block, and a nut is threadedly connected to the other end of the rotating shaft, with the nut abutting against the rotating block.
[0007] Preferably, the cross-section of the rotating shaft is T-shaped, and the rotating block is U-shaped.
[0008] Preferably, a first tension spring is fixedly connected between the end of the slide rod and the inner wall of the telescopic plate, a second tension spring is fixedly connected between the pin and the telescopic plate, a slider is slidably connected to the telescopic plate, a movable probe is fixedly connected to the bottom of the slider, a third bolt is threadedly connected to the top of the slider, and the bottom of the third bolt abuts against the telescopic plate.
[0009] Preferably, the slide bar has an elliptical structure, and the end of the pin has a bevel, with the bevel at the end of the pin slidingly engaging with the edge of the insertion hole.
[0010] Preferably, a housing is fixedly connected to the slide, a second bolt is threaded onto the slide, the end of the second bolt abuts against the ruler body, and a digital display screen is fixedly connected to the housing.
[0011] Preferably, the bottom of the ruler body is provided with a support structure, the support structure includes a base, the bottom of the ruler body is provided with a base, the ruler body and the base are rotatably connected, and a first bolt is threadedly connected to the base, the end of the first bolt is threadedly connected to the ruler body.
[0012] Preferably, a magnet is engaged on the bottom surface of the base, and the cross-section of the base has a "convex" shape.
[0013] The beneficial effects of this utility model are as follows: A sliding block is slidably connected to the ruler body, a rotating block is fixedly connected to the bottom of the sliding block, a rotating shaft is fixedly connected to the rotating block, a sliding rod is fixedly connected to the rotating shaft, a telescopic plate is slidably connected to the sliding rod, and multiple insertion holes are opened on the sliding rod. A pin is slidably connected to the bottom of the telescopic plate, and the pin engages with the adjacent insertion hole. A slot is opened on the telescopic plate, and a knob is threadedly connected to the top of the sliding block. When the telescopic plate is pulled outward, after it is stretched to a suitable length, the pin engages with the corresponding insertion hole, increasing the sliding distance of the movable probe. The telescopic plate rotates around the rotating block. Finally, the knob on the top of the sliding block is rotated so that the bottom of the knob abuts against the slot on the telescopic plate, thus realizing the folding of the telescopic plate for easy storage. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 This is a schematic diagram of the connection structure between the base and the ruler body of this utility model;
[0016] Figure 3 for Figure 2 The diagram shown is an enlarged view of the structure of part A.
[0017] Figure 4This is a schematic diagram of the connection structure between the base and the first bolt of this utility model;
[0018] Figure 5 This is a schematic diagram of the connection structure between the telescopic plate and the slider of this utility model;
[0019] Figure 6 This is a schematic diagram of the connection structure between the rotating shaft and the rotating block of this utility model.
[0020] In the diagram: 1. Ruler body; 2. Support structure; 201. Base; 202. Magnet; 203. First bolt; 3. Measuring structure; 301. Slide; 302. Outer shell; 303. Digital display screen; 304. Second bolt; 4. Folding structure; 401. Rotary base; 402. Rotating shaft; 403. Rotating block; 404. Torsion spring; 405. Nut; 5. Telescopic structure; 501. Slide rod; 502. Telescopic plate; 503. First tension spring; 504. Pin; 505. Second tension spring; 506. Insertion hole; 507. Slider; 508. Third bolt; 509. Movable probe; 510. Slot; 511. Knob. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Please see Figures 1-6As shown, a bridge pavement expansion joint height difference detection device includes a ruler body 1, a measuring structure 3 on the ruler body 1, a slide 301 slidably connected to the ruler body 1, a folding structure 4 connected to the slide 301, a rotating seat 401, a rotating shaft 402 fixedly connected to the bottom of the slide 301, a rotating block 403 rotatably connected to the rotating shaft 402, a torsion spring 404 fixedly connected between one end of the rotating shaft 402 and the rotating block 403, and a nut 405 threadedly connected to the other end of the rotating shaft 402, the nut 405 abutting against the rotating block. 403. The cross-section of the rotating shaft 402 is T-shaped, and the rotating block 403 is U-shaped. When storage is required, simply remove the slider 507 and the movable probe 509 from the telescopic plate 502 for separate storage. Then, rotate the nut 405 at the end of the rotating shaft 402. Under the force of the torsion spring 404, the rotating block 403 drives the telescopic plate 502 to rotate 90 degrees around the rotating seat 401. Finally, rotate the knob 511 on the top of the slide seat 301 so that the bottom of the knob 511 abuts against the slot 510 on the telescopic plate 502. At this time, the telescopic plate 502 is folded for easy storage.
[0023] As a technical optimization of this utility model, the position of the movable probe 509 needs to be adjusted so that it can fit against the road surface on the other side of the expansion joint. The rotating block 403 is equipped with a telescopic structure 5, which includes a slide rod 501. The slide rod 501 is fixedly connected to the rotating block 403, and a telescopic plate 502 is slidably connected to the slide rod 501. Multiple insertion holes 506 are provided on the slide rod 501. A pin 504 is slidably connected to the bottom of the telescopic plate 502, and the pin 504 engages with the adjacent insertion hole 506. A slot 510 is provided on the telescopic plate 502, and a knob 51 is threadedly connected to the top of the slide block 301. 1. A first tension spring 503 is fixedly connected between the end of the sliding rod 501 and the inner wall of the telescopic plate 502. A second tension spring 505 is fixedly connected between the pin 504 and the telescopic plate 502. A slider 507 is slidably connected to the telescopic plate 502. A movable probe 509 is fixedly connected to the bottom of the slider 507. A third bolt 508 is threadedly connected to the top of the slider 507. The bottom of the third bolt 508 abuts against the telescopic plate 502. Simply rotate the third bolt 508 so that the bottom surface of the third bolt 508 no longer abuts against the telescopic plate 502, and then slide the slider 507 towards the other side of the road until the slider 507... The movable probe 509 at the bottom is moved to a suitable position, and then the equipment is zeroed. The elevation difference can then be measured by sliding the slide block 301 up and down, in conjunction with the horizontal sliding slider 507. The slide rod 501 has an elliptical structure, and the end of the pin 504 has a bevel. The bevel at the end of the pin 504 slides against the edge of the insertion hole 506. When measuring the elevation difference of expansion joints of different widths, simply pull the telescopic plate 502 outward to increase the horizontal sliding distance of the movable probe 509. During the pulling process, the telescopic plate 502 slides along the elliptical slide rod 501 to the side. The first tension spring 503 is stretched, and during this process, the inclined surface at the end of the pin 504 slides against the insertion hole 506 on the slide rod 501, causing the pin 504 to slide downwards until it no longer obstructs the extension plate 502 from extending outwards. When the extension plate 502 is stretched outwards to a suitable length, the pin 504 re-engages with the corresponding insertion hole 506 under the tension of the second tension spring 505. At this time, the position of the extension plate 502 is limited. At the same time, the extension plate 502 causes the movable probe 509 to extend further, increasing the sliding distance of the movable probe 509, which is convenient to adapt to expansion joints of different widths and has high flexibility.
[0024] As a technical optimization of this utility model, a housing 302 is fixedly connected to the slide 301, and a second bolt 304 is threadedly connected to the slide 301. The end of the second bolt 304 abuts against the ruler body 1. A digital display screen 303 is fixedly connected to the housing 302. The slide 301 can be locked by the second bolt 304, which has strong stability. During measurement, the movable probe 509 is made to fit against the road surface on the other side of the expansion joint. After the value of the digital display screen 303 on the housing 302 stabilizes, the height difference data of the two road surfaces is read and recorded. Multiple measuring points are selected along the length of the expansion joint for repeated measurement to avoid single-point error and make the operation simple.
[0025] As a technical optimization of this utility model, the bottom of the ruler body 1 is provided with a support structure 2, which includes a base 201. The base 201 is provided at the bottom of the ruler body 1, and the ruler body 1 and the base 201 are rotatably connected. A first bolt 203 is threadedly connected to the base 201, and the end of the first bolt 203 is threadedly connected to the ruler body 1. The ruler body 1 is placed on the road surface on one side of the expansion joint through the base 201 at the bottom, ensuring that the base 201 and the ruler body 1 are in complete contact with the road surface without tilting. Then, the ruler body 1 is rotated to a suitable angle, and the first bolt 203 is used to lock the ruler body 1 and the base 201 together. This allows the testing personnel to flexibly adjust the angle of the surface difference ruler so that it can smoothly contact the measurement point and complete the measurement. A magnet 202 is engaged on the bottom surface of the base 201. The cross-section of the base 201 is a "convex" shaped structure. At the same time, the magnet 202 at the bottom of the base 201 can be attracted to the iron expansion joint, which is convenient for fixing it and improves the stability during the measurement process.
[0026] In use, the ruler 1 is placed on the road surface on one side of the expansion joint via the base 201 at the bottom, ensuring that the base 201 and the ruler 1 are in complete contact with the road surface without tilting. Then, the ruler 1 is rotated to a suitable angle, and the ruler 1 is locked to the base 201 by the first bolt 203. This allows the inspector to flexibly adjust the angle of the surface difference ruler so that it can smoothly contact the measuring point, thereby completing the measurement. At the same time, the magnet 202 at the bottom of the base 201 can be attracted to the iron expansion joint, making it easy to fix and improving the stability during the measurement process. Next, the position of the movable probe 509 needs to be adjusted so that it can fit against the road surface on the other side of the expansion joint. This is done by first rotating the third bolt 508. This ensures that the bottom surface of the third bolt 508 no longer contacts the expansion joint 502. Then, slide the slider 507 towards the other side of the road surface until the slider 507 moves the movable probe 509 at the bottom to a suitable position. Next, perform a zeroing operation on the equipment. Then, the elevation difference data can be measured by sliding the slide block 301 up and down in conjunction with the horizontal sliding slider 507. Simultaneously, the slide block 301 can be locked by the second bolt 304, ensuring strong stability. During measurement, the movable probe 509 is placed against the road surface on the other side of the expansion joint. After the value on the digital display screen 303 on the outer casing 302 stabilizes, the elevation difference data of the two road surfaces is read and recorded. Multiple measuring points are selected along the length of the expansion joint for repeated measurements to avoid single-point measurement. The measurement is simple and easy to operate. When detecting the height difference of expansion joints of different widths, simply pull the telescopic plate 502 outward to increase the lateral sliding distance of the movable probe 509. During the pulling process, the telescopic plate 502 slides to the side along the elliptical slide rod 501 and stretches the first tension spring 503. During this process, the inclined surface at the end of the pin 504 slides into the insertion hole 506 on the slide rod 501, causing the pin 504 to slide downward until it no longer obstructs the outward extension of the telescopic plate 502. When the telescopic plate 502 is stretched outward to the appropriate length, the pin 504, under the tension of the second tension spring 505, re-engages with the corresponding insertion hole 506. At this point, the position of the telescopic plate 502 is measured. The telescopic plate 502 extends the movable probe 509 further, increasing its sliding distance and making it more adaptable to expansion joints of different widths. It is highly flexible. When it needs to be stored, simply remove the slider 507 and the movable probe 509 from the telescopic plate 502 for separate storage. Then, rotate the nut 405 at the end of the rotating shaft 402. Under the force of the torsion spring 404, the rotating block 403 drives the telescopic plate 502 to rotate 90 degrees around the rotating seat 401. Finally, rotate the knob 511 on the top of the slide seat 301 so that the bottom of the knob 511 abuts against the slot 510 on the telescopic plate 502. At this point, the telescopic plate 502 is folded for easy storage.
[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A bridge pavement expansion joint height difference detection device, comprising a ruler (1), characterized in that: The ruler body (1) is provided with a measuring structure (3), the measuring structure (3) includes a slide (301), the slide (301) is slidably connected to the ruler body (1), the slide (301) is connected with a folding structure (4), the folding structure (4) includes a rotating seat (401), the bottom of the slide (301) is fixedly connected to the rotating seat (401), the rotating seat (401) is fixedly connected to a rotating shaft (402), the rotating shaft (402) is rotatably connected to a rotating block (403), and the rotating block (403) is provided with a telescopic structure (5). The telescopic structure (5) includes a slide rod (501), the slide rod (501) is fixedly connected to the rotating block (403), the telescopic plate (502) is slidably connected to the slide rod (501), the slide rod (501) is provided with a plurality of insertion holes (506), the bottom of the telescopic plate (502) is slidably connected with a pin (504), the pin (504) and the adjacent insertion hole (506) are engaged with each other, the telescopic plate (502) is provided with a slot (510), and the top of the slide block (301) is threadedly connected with a knob (511).
2. The bridge pavement expansion joint height difference detection device according to claim 1, characterized in that: A torsion spring (404) is fixedly connected between one end of the rotating shaft (402) and the rotating block (403), and a nut (405) is threadedly connected to the other end of the rotating shaft (402), with the nut (405) abutting against the rotating block (403).
3. The bridge pavement expansion joint height difference detection device according to claim 2, characterized in that: The cross-section of the rotating shaft (402) is T-shaped, and the rotating block (403) is U-shaped.
4. The bridge pavement expansion joint height difference detection device according to claim 1, characterized in that: A first tension spring (503) is fixedly connected between the end of the slide rod (501) and the inner wall of the telescopic plate (502). A second tension spring (505) is fixedly connected between the pin (504) and the telescopic plate (502). A slider (507) is slidably connected on the telescopic plate (502). A movable probe (509) is fixedly connected to the bottom of the slider (507). A third bolt (508) is threadedly connected to the top of the slider (507). The bottom of the third bolt (508) abuts against the telescopic plate (502).
5. The bridge pavement expansion joint height difference detection device according to claim 4, characterized in that: The slide bar (501) has an elliptical structure, and the end of the pin (504) has a bevel. The bevel at the end of the pin (504) slides in fit with the edge of the insertion hole (506).
6. The bridge pavement expansion joint height difference detection device according to claim 1, characterized in that: A housing (302) is fixedly connected to the slide (301), and a second bolt (304) is threadedly connected to the slide (301). The end of the second bolt (304) abuts against the ruler body (1), and a digital display screen (303) is fixedly connected to the housing (302).
7. The bridge pavement expansion joint height difference detection device according to claim 6, characterized in that: The bottom of the ruler body (1) is provided with a support structure (2), the support structure (2) includes a base (201), the bottom of the ruler body (1) is provided with a base (201), the ruler body (1) and the base (201) are rotatably connected, a first bolt (203) is threaded on the base (201), and the end of the first bolt (203) is threadedly connected to the ruler body (1).
8. The bridge pavement expansion joint height difference detection device according to claim 7, characterized in that: The base (201) has a magnet (202) engaged on its bottom surface, and the cross-section of the base (201) has a "convex" shaped structure.