High-speed railway bridge settlement optical fiber measuring device

Abstract

The application discloses a high-speed railway bridge settlement optical fiber measuring equipment and relates to the field of high-speed railway bridge settlement measurement.The equipment comprises a bridge body and a benchmark pile, one side of the bridge body is provided with a winding box, one end of the winding box is rotationally connected with a winding roller, one end of the winding roller is detachably connected with a rotating drum, a torsional spring is arranged at the connection position of the rotating drum and the winding box, one end of the rotating drum penetrates into the winding box and is connected with a side bevel gear, one side of the bevel gear is drivingly connected with a threaded rod, and a pressing plate is slidably arranged on the threaded rod.When the bridge settles, the rotating drum on the winding box rotates under the action of the torsional spring, the optical fiber between the rotating drum and the winding box is tightened, the optical fiber is always kept in a tight state, the influence of external wind on the connection position is greatly reduced, the threaded rod is driven to rotate under the action of a transmission mechanism, the pressing plate is tightly attached to the top of the winding roller, and the stability of the winding of the optical fiber is ensured.

Description

Technical Field

[0001] This invention relates to the field of high-speed railway bridge settlement measurement, specifically to a fiber optic measurement device for high-speed railway bridge settlement. Background Technology

[0002] High-speed rail has developed rapidly in my country, with more and more high-speed rail lines connecting various parts of the country. However, my country's complex geological structure means that high-speed rail lines in harsh geological conditions such as the Loess Plateau and the Qinghai-Tibet Plateau are prone to bridge settlement. If the settlement exceeds the safety limit, the safe operation of high-speed rail will be greatly threatened. Therefore, settlement monitoring of high-speed rail bridges is particularly important.

[0003] Existing bridge settlement monitoring methods mostly employ GPS, laser imaging, optical interferometers, and other technologies. These methods often suffer from problems such as complex instrument operation, inconvenience of use, and difficulty in conducting real-time monitoring. In addition, high-speed railway bridges are often located in outdoor environments and are subject to complex interferences such as lightning strikes, which affects the applicability of these technologies.

[0004] Chinese patent CN108759780A discloses a fiber optic grating monitoring device for high-speed railway bridge pier settlement. The device consists of a first fiber optic grating 4, where the left fiber is wound around and adhesively fixed to a first reference pile cylindrical protrusion 3-1. After stretching, the right fiber is wound around and adhesively fixed to a bridge pier cylindrical protrusion 2-1. A second fiber optic grating 5 is suspended freely on the bridge pier cylindrical protrusion 2-1. A third fiber optic grating 6 has its left fiber wound around and adhesively fixed to the bridge pier cylindrical protrusion 2-1. After stretching, its right fiber is wound around and adhesively fixed to a second reference pile cylindrical protrusion 7-1. Using fiber optic gratings as sensing elements to measure bridge pier settlement deformation, the device is unaffected by electromagnetic interference in the field, can transmit signals over long distances of hundreds of kilometers, and can connect dozens of grating measuring points in series on a single fiber, enabling distributed real-time monitoring.

[0005] During the use of the above structure, when the bridge settles, the optical fiber will also move with the bridge. At this time, the distance between the grating between the reference pile and the bridge changes, resulting in the grating being loosely installed between the two. Since the monitoring equipment is always outdoors, the optical fiber will shake violently under the action of external wind. When facing strong winds, the connection of the optical fiber will become loose, thus affecting its detection of bridge settlement.

[0006] In summary, the aforementioned structure can cause the optical fiber to loosen during operation, leading to malfunctions at the connection points, affecting the normal monitoring of the bridge, and making it difficult to inspect and maintain the optical fiber in daily operations. Summary of the Invention

[0007] Based on this, the purpose of the present invention is to provide a fiber optic measurement device for the settlement of high-speed railway bridges, so as to solve the technical problem that the above-mentioned structure will cause the optical fiber to loosen during operation, resulting in failure at its connection point, affecting the normal monitoring of the bridge, and making it difficult to inspect and maintain the optical fiber in daily operations.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a fiber optic measurement device for the settlement of a high-speed railway bridge, comprising a bridge body and a reference pile, wherein a winding box is provided on one side of the bridge body, a winding roller is rotatably connected to one end of the winding box, a rotating drum is detachably connected to one end of the winding roller, and a torsion spring is provided at the connection between the rotating drum and the winding box, one end of the rotating drum penetrates into the winding box and is connected to a side bevel gear, and a threaded rod is drivenly connected to one side of the rotating drum, and a pressure plate is slidably provided on the threaded rod.

[0009] By adopting the above technical solution, when the bridge settles, the rotating drum on the winding box rotates under the action of the torsion spring, tightening the optical fiber between the two, ensuring that the optical fiber is always in a taut state, greatly reducing the impact of external wind on its connection. At the same time, under the action of the transmission mechanism, the threaded rod is driven to rotate, so that the pressure plate is pressed against the top of the winding roller, ensuring the stability of the winding between the optical fibers.

[0010] The present invention is further configured such that a rotating rod is provided at one end of the winding roller, and an array of limiting blocks are provided on the rotating rod; a groove is provided inside the rotating drum, and an array of limiting grooves that cooperate with the limiting blocks are provided at the groove.

[0011] By adopting the above technical solution, the limiting block on the rotating rod is inserted into the rotating cylinder through its engagement with the groove. Simultaneously, rotating the rotating rod causes the limiting block to rotate into the limiting groove of the rotating cylinder, thus limiting and fixing the rotating rod and preventing it from slipping out of the rotating cylinder. This also facilitates subsequent disassembly by maintenance personnel, accelerating subsequent maintenance efficiency and reducing the workload of maintenance staff.

[0012] The invention is further configured such that one end of the threaded rod penetrates into the winding box and is provided with a spur bevel gear that engages with its side bevel gear.

[0013] By adopting the above technical solution, through the cooperation of the positive bevel gear and the side bevel gear, the screw rod can be driven to rotate when the drum rotates.

[0014] The present invention is further configured such that a groove is provided at the winding box, and a threaded sleeve is slidably provided on the threaded rod, and the threaded sleeve can slide within the groove.

[0015] By adopting the above technical solution, the threaded rod drives the threaded sleeve to slide in the groove, thereby keeping the pressure plate at the top of the winding roller and ensuring the stability of the winding between the optical fibers.

[0016] The present invention is further configured such that one end of the threaded sleeve is provided with a locking block, and a locking groove is provided in the sliding groove to cooperate with and slide therewith.

[0017] By adopting the above technical solution, the threaded sleeve is limited by the cooperation of the locking block and the locking groove, preventing the threaded sleeve from rotating during the rotation of the threaded rod, and ensuring the stability of the threaded sleeve sliding on the threaded rod.

[0018] The present invention is further configured such that the reference pile is provided with an optical fiber buckle, and the optical fiber buckle is detachable.

[0019] By adopting the above technical solution, the optical fiber body can be fixed to the reference pile through the optical fiber buckle, thereby improving the overall stability of its installation.

[0020] The present invention is further configured such that the reference pile is located at the middle position of the adjacent bridge body.

[0021] By adopting the above technical solution, the optical fiber body and the bridge body form an isosceles triangle, which makes it easy for people to intuitively observe the height of the bridge body's settlement.

[0022] The present invention is further configured such that the outer wall of each winding roller is provided with a protective sleeve.

[0023] By adopting the above technical solution, the protective sleeve can prevent the optical fiber body from being worn during the winding process, reduce the failure rate of its monitoring, and improve the overall service life.

[0024] In summary, the present invention has the following main beneficial effects:

[0025] 1. This invention provides a winding box on the bridge body. When the bridge settles, the rotating drum on the winding box rotates under the action of a torsion spring, tightening the optical fibers between them and ensuring that the optical fibers are always taut. This greatly reduces the impact of external wind on the connection. At the same time, the transmission mechanism drives the threaded rod to rotate, so that the pressure plate is pressed against the top of the winding roller, ensuring the stability of the winding between the optical fibers.

[0026] 2. This invention provides a side bevel gear at one end of the rotating drum and a spur bevel gear at one end of the threaded rod, with the same tooth pitch between the two. The diameter of the spur bevel gear is several times that of the side bevel gear. When the optical fiber on the winding roller rotates several times on the same horizontal plane, the pressure plate always remains at the top of the winding roller, ensuring the high efficiency of optical fiber winding during the monitoring process and improving the overall service life of the optical fiber.

[0027] 3. The present invention provides a groove and a limiting groove inside the rotating cylinder. The limiting block on the rotating rod is inserted into the rotating cylinder by cooperating with the groove. At the same time, rotating the rotating rod causes the limiting block to rotate into the limiting groove of the rotating cylinder, thereby limiting and fixing it, preventing the rotating rod from slipping out of the rotating cylinder, and facilitating subsequent disassembly by the staff, thus speeding up the subsequent maintenance efficiency and reducing the workload of maintenance personnel. Attached Figure Description

[0028] Figure 1 This is a perspective view of the present invention;

[0029] Figure 2 This is the front view of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of the present invention;

[0031] Figure 4 This is a partial structural diagram of the present invention;

[0032] Figure 5 For the present invention Figure 3 A magnified view of A in the middle.

[0033] In the diagram: 1. Bridge body; 2. Base pile; 3. Winding roller; 4. Pressure plate; 5. Fiber optic buckle; 6. Threaded rod; 7. Slide groove; 8. Winding box; 9. Fiber optic body; 10. Threaded sleeve; 11. Positive bevel gear; 12. Side bevel gear; 13. Groove; 14. Limiting groove; 15. Rotary drum; 16. Limiting block; 17. Rotating rod. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0035] The embodiments of the present invention will now be described.

[0036] A fiber optic measurement device for the settlement of high-speed railway bridges, such as Figures 1-5As shown, the structure includes a bridge body 1, a reference pile 2, a winding mechanism, a transmission mechanism, and a sliding mechanism. A reference pile 2 is installed at the midpoint between the two sets of bridge bodies 1, forming an isosceles triangle between the optical fiber body 9 and the bridge body 1. This facilitates visual observation of the bridge body's settlement height. The top of the reference pile 2 is free of any weight pressure and therefore will not settle, serving as a reference point. The optical fiber body 9 is connected and fixed using optical fiber clips 5. When the bridge body 1 experiences settlement displacement, the tension on the optical fiber body 9 changes, and the wavelength drift can be observed. Since the distance between the bridge body 1 and the reference pile 2 is fixed, the settlement length can be monitored by measuring the change in the length of the optical fiber body 9 on the bridge body 1. Simultaneously, a rotating drum 15 is connected to one end of the winding roller 3. A torsion spring is installed at the connection between the rotating drum 15 and the winding box 8. When the bridge body 1 settles, the winding roller 3 rotates under the action of the torsion spring. The optical fiber body 9 is wound up, tightening the optical fiber between the two to ensure that the optical fiber is always in a taut state, greatly reducing the impact of external wind on the connection. At the same time, a side bevel gear 12 is provided at one end of the rotating drum 15. Through its cooperation with the positive bevel gear 11, it drives the threaded rod 6 to rotate. Under the transmission action of the threaded sleeve 10 and the threaded rod 6, the pressure plate 4 is pressed tightly against the top of the winding roller 3, ensuring the stability of the winding between the optical fibers. The positive bevel gear 11 and the side bevel gear 12 have the same tooth pitch, but different diameters. The diameter of the side bevel gear 12 is one-quarter of that of the positive bevel gear 11. At the same time, four sets of optical fiber bodies 9 are arranged on the same horizontal plane on the winding roller 3, and a partial gap is left between the pressure plate 4 and the optical fiber body 9. After the optical fiber on the winding roller 3 rotates several times on the same horizontal plane, the pressure plate 4 always stays on the top of the winding roller 3, ensuring the high efficiency of optical fiber winding during the monitoring process and improving the overall service life of the optical fiber.

[0037] Based on the above structure, in this embodiment, the optical fiber body 9, the winding roller 3 and the optical fiber buckle 5 form a right triangle. When one side of the bridge body 1 settles, the length of the other right-angled side can be obtained based on the length change of the optical fiber body 9. Therefore, the settlement height of the bridge body 1 can be monitored intuitively.

[0038] Based on the above structure, in this embodiment, the rotating cylinder 15 is provided with a groove 13 and a limiting groove 14. The limiting block 16 on the rotating rod 17 slides into the rotating cylinder 15, and then the rotating rod 17 is rotated so that the limiting block 16 rotates into the limiting groove 14, thereby limiting and fixing it to prevent the rotating rod 17 from slipping out of the rotating cylinder 15. At the same time, it is convenient for subsequent workers to disassemble it, speeding up the subsequent maintenance efficiency and reducing the workload of maintenance personnel.

[0039] Based on the above structure, in this embodiment, a locking block is provided at one end of the threaded sleeve 10, and a locking groove is provided in the slide groove 7 to cooperate with it. Through the cooperation of the locking block and the locking groove, the threaded sleeve 10 is limited to prevent the threaded rod 6 from rotating during the rotation process, thus ensuring the stability of the threaded sleeve 10 sliding on the threaded rod 6.

[0040] Based on the above structure, in this embodiment, the outer wall of the winding roller 3 is provided with a protective sleeve. The protective sleeve can prevent the optical fiber body 9 from being worn during the winding process, reduce the failure rate of its monitoring, and improve the overall service life.

[0041] During use, there is no pressure from any heavy objects on the top of the reference pile 2. When the bridge body 1 settles, the length of the optical fiber between the reference pile 2 and the reference pile 2 decreases. Under the action of the torsion spring, the winding roller 3 is driven to rotate and wind up the optical fiber, so that the optical fiber in the support of both is always in a taut state, which greatly reduces the impact of external wind on the optical fiber connector and improves its overall service life. At the same time, under the action of the transmission mechanism, the threaded rod 6 is driven to rotate, so that the pressure plate 4 is always on top of the winding roller 3 to ensure the stability of the winding between the optical fibers.

[0042] This invention innovatively incorporates a rewind box on the bridge structure, avoiding the traditional method of directly installing optical fibers between the bridge structure and the reference pile. In existing technologies, during settlement, the fiber distance between the two shortens, resulting in a loose fiber that can be violently shaken by strong winds, causing malfunctions at the connection and affecting normal bridge monitoring. In this solution, the combination of a rewind roller and a torsion spring ensures that the optical fiber remains taut between the two, significantly reducing the impact of external wind on the connection.

[0043] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A fiber optic measurement device for the settlement of a high-speed railway bridge, comprising a bridge body (1) and a reference pile (2), characterized in that: A winding box (8) is provided on one side of the bridge body (1). A winding roller (3) is rotatably connected to one end of the winding box (8). A rotating drum (15) is detachably connected to one end of the winding roller (3). A torsion spring is provided at the connection between the rotating drum (15) and the winding box (8). A side bevel gear (12) is connected to one end of the rotating drum (15) through the winding box (8). A threaded rod (6) is connected to one side of the rotating drum (15). A pressure plate (4) is slidably provided on the threaded rod (6). A rotating rod is provided at one end of the winding roller (3). (17), and an array of limiting blocks (16) are provided on the rotating rod (17), a groove (13) is provided in the rotating cylinder (15), and an array of limiting grooves (14) that cooperate with the limiting blocks (16) are provided at the groove (13); a sliding groove (7) is provided at the winding box (8), a threaded sleeve (10) is slidably provided on the threaded rod (6), and the threaded sleeve (10) can slide in the sliding groove (7), a locking block is provided at one end of the threaded sleeve (10), and a locking groove that cooperates with it is provided in the sliding groove (7).

2. The fiber optic measurement device for high-speed railway bridge settlement according to claim 1, characterized in that: One end of the threaded rod (6) passes through the winding box (8) and is equipped with a spur bevel gear (11) that meshes with its side bevel gear (12).

3. The fiber optic measurement device for high-speed railway bridge settlement according to claim 1, characterized in that: The reference pile (2) is equipped with an optical fiber buckle (5), and the optical fiber buckle (5) is detachable.

4. The fiber optic measurement device for high-speed railway bridge settlement according to claim 1, characterized in that: The reference pile (2) is located at the middle position of the adjacent bridge body (1).

5. The fiber optic measurement device for high-speed railway bridge settlement according to claim 1, characterized in that: The outer wall of the take-up roller (3) is provided with a protective sleeve.

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