Long-term online monitoring device for dynamic performance of railway standard beam

Abstract

The utility model discloses a railway standard beam dynamic performance long-term on-line monitoring device which comprises a T-beam horseshoe in the midspan of a railway standard beam, two vertical one-way accelerometers and two transverse one-way accelerometers are arranged on the outer side of the T-beam horseshoe, and the two vertical one-way accelerometers and the two transverse one-way accelerometers are arranged on the outer side of the T-beam horseshoe. The two vertical one-way accelerometers are used for measuring vertical amplitude and vertical acceleration respectively, the two transverse one-way accelerometers are used for measuring transverse amplitude and transverse acceleration respectively, and a hygrothermograph for measuring temperature and humidity is arranged on the pier top. According to the utility model, the vertical amplitude and the vertical acceleration are permanently monitored through the two vertical one-way accelerometers, the transverse amplitude and the transverse acceleration are permanently monitored through the two transverse one-way accelerometers, and overhead fixation is carried out through the overhead bolt and nut assembly, so that the service life of permanent monitoring is met; the hygrothermograph is supported by the hygrothermograph support in a cantilever mode, and the service life of permanent monitoring is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of standard beam monitoring, and in particular relates to a long-term online monitoring device for dynamic performance of a railway standard beam. Background Art

[0002] At present, the maintenance and management of railway bridges in my country is separated from inspection and repair. The work is divided into inspection, maintenance and overhaul, and mainly adopts manual inspection, which includes hydrological observation, regular inspection, temporary inspection, special inspection, verification test, etc. Manual inspection is inefficient, and the maintenance conditions in special areas such as high-altitude, high-altitude, and dangerous mountainous areas are poor. It is necessary to study the use of information monitoring methods, or develop operation and maintenance technologies that combine online monitoring and inspection.

[0003] Structural health monitoring is to conduct non-destructive monitoring of the physical and mechanical properties of the structure, monitor the overall behavior of the structure in real time, diagnose the location and extent of structural damage, evaluate the service condition, reliability, durability and bearing capacity of the structure, and provide technical support for structural repair, maintenance and management decisions. Summary of the invention

[0004] The utility model is proposed to solve the problems existing in the prior art, and its purpose is to provide a long-term online monitoring device for the dynamic performance of a railway standard beam.

[0005] The technical solution of the utility model is: a long-term online monitoring device for the dynamic performance of a railway standard beam, comprising a T-beam horseshoe in the span of the railway standard beam, two vertical unidirectional accelerometers and two transverse unidirectional accelerometers are arranged on the outer side of the T-beam horseshoe, the two vertical unidirectional accelerometers respectively measure the vertical amplitude and the vertical acceleration, the two transverse unidirectional accelerometers respectively measure the transverse amplitude and the transverse acceleration, and a thermometer and hygrometer for measuring temperature and humidity is arranged on the pier top.

[0006] Furthermore, the vertical unidirectional accelerometer and the lateral unidirectional accelerometer have the same structure, and the vertical unidirectional accelerometer and the lateral unidirectional accelerometer are both fixed by an accelerometer bracket.

[0007] Furthermore, the thermometer and hygrometer is fixed on the pier top by a thermometer and hygrometer bracket.

[0008] Furthermore, a pipeline is arranged on the outside of the standard railway beam, and the pipeline accommodates the connection lines of the vertical unidirectional accelerometer and the transverse unidirectional accelerometer.

[0009] Furthermore, a collection box is arranged on the top of the pier, and the collection box is connected to the vertical unidirectional accelerometer, the lateral unidirectional accelerometer, and the thermometer and hygrometer.

[0010] Furthermore, the accelerometer bracket is in a groove shape, and the upper end of the accelerometer bracket is transversely bent to form a fixed folding plate, and the fixed folding plate is connected to the steel plate of the railway standard beam.

[0011] Furthermore, the fixed folding plate is in surface contact with the steel plate of the railway standard beam, and the contact surfaces of the two are connected by a structural adhesive.

[0012] Furthermore, the vertical unidirectional accelerometer and the lateral unidirectional accelerometer are connected to the accelerometer bracket via an overhead bolt and nut assembly.

[0013] Furthermore, the thermometer and hygrometer bracket is a single-arm suspended bracket, and the thermometer and hygrometer bracket supports the thermometer and hygrometer in suspension.

[0014] The beneficial effects of the utility model are as follows:

[0015] The utility model permanently monitors the vertical amplitude and vertical acceleration through two vertical unidirectional accelerometers, and permanently monitors the lateral amplitude and lateral acceleration through two lateral unidirectional accelerometers. It is overhead fixed through an overhead bolt and nut assembly to meet the service life of permanent monitoring. The thermometer and humidity meter bracket is cantilevered to support the thermometer and humidity meter to meet the service life of permanent monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the elevation layout diagram of the utility model;

[0017] Figure 2 yes Figure 1 A cross-sectional view along section Ⅰ-Ⅰ;

[0018] Figure 3 It is a schematic diagram of the installation of the unidirectional accelerometer in the utility model;

[0019] Figure 4 yes Figure 3 Sectional view along section AA;

[0020] Figure 5 yes Figure 3 A cross-sectional view along section BB;

[0021] Figure 6 It is a structural schematic diagram of the thermometer and hygrometer bracket of the utility model;

[0022] in:

[0023] 1T beam horseshoe 2 vertical unidirectional accelerometer

[0024] 3 Lateral unidirectional accelerometer 4 Pipeline

[0025] 5 Collection box 6 Pier top

[0026] 7 Thermohygrometer 8 Support center vertical line

[0027] 9 Structural Adhesive 10 Accelerometer Bracket

[0028] 11 Connecting bolt 12 First nut

[0029] 13 Second nut 14 Third nut

[0030] 15 Accelerometer interface 16 Base plate

[0031] 17 Bottom folding plate 18 Transition plate

[0032] 19 Mounting plate. DETAILED DESCRIPTION

[0033] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and embodiments:

[0034] like Figures 1 to 6 As shown, a long-term online monitoring device for the dynamic performance of a standard railway beam comprises a T-beam horseshoe 1 in the span of the standard railway beam, two vertical unidirectional accelerometers 2 and two transverse unidirectional accelerometers 3 are arranged on the outer side of the T-beam horseshoe 1, the two vertical unidirectional accelerometers 2 respectively measure the vertical amplitude and the vertical acceleration, the two transverse unidirectional accelerometers 3 respectively measure the transverse amplitude and the transverse acceleration, and a thermometer and hygrometer 7 for measuring temperature and humidity is arranged on the pier top 6.

[0035] The vertical unidirectional accelerometer 2 and the lateral unidirectional accelerometer 3 have the same structure, and both the vertical unidirectional accelerometer 2 and the lateral unidirectional accelerometer 3 are fixed by an accelerometer bracket 10 .

[0036] The thermometer and hygrometer 7 is fixed on the pier top 6 via a thermometer and hygrometer bracket.

[0037] A pipeline 4 is arranged outside the railway standard beam, and the pipeline 4 accommodates the connection lines of the vertical unidirectional accelerometer 2 and the transverse unidirectional accelerometer 3.

[0038] A collection box 5 is provided on the pier top 6 , and the collection box 5 is connected to the vertical unidirectional accelerometer 2 , the lateral unidirectional accelerometer 3 , and the thermometer and hygrometer 7 .

[0039] The accelerometer bracket 10 is in a groove shape, and the upper end of the accelerometer bracket 10 is transversely bent to form a fixed folding plate, and the fixed folding plate is connected to the steel plate of the railway standard beam.

[0040] The fixed folding plate is in surface contact with the steel plate of the railway standard beam, and the contact surfaces of the two are connected by a structural adhesive 9.

[0041] The vertical unidirectional accelerometer 2 and the lateral unidirectional accelerometer 3 are connected to the accelerometer bracket 10 via an overhead bolt and nut assembly.

[0042] The thermometer and hygrometer bracket is a single-arm suspended bracket, and the thermometer and hygrometer bracket supports the thermometer and hygrometer 7 in suspension.

[0043] Specifically, the overhead bolt and nut assembly includes a connecting bolt 11, which passes through the ear plates of the vertical unidirectional accelerometer 2 and the lateral unidirectional accelerometer 3 from top to bottom. After the connecting bolt 11 passes through the ear plates, the third nut 14 and the second nut 13 are screwed on. After the third nut 14 and the second nut 13 are screwed on, the connecting bolt 11 passes through the through hole in the accelerometer bracket 10 from top to bottom, and the first nut 12 is screwed on the passing section of the connecting bolt 11.

[0044] Specifically, each vertical unidirectional accelerometer 2 and each lateral unidirectional accelerometer 3 is fixed by four groups of overhead bolt and nut assemblies, and corresponding through holes are formed in the accelerometer bracket 10 .

[0045] Specifically, the overhead height between the vertical unidirectional accelerometer 2 , the lateral unidirectional accelerometer 3 and the accelerometer bracket 10 is the sum of the thickness of the third nut 14 and the second nut 13 .

[0046] Specifically, an accelerometer interface 15 is formed in the vertical unidirectional accelerometer 2 and the lateral unidirectional accelerometer 3 , and circuit connection is performed through the accelerometer interface 15 .

[0047] Specifically, the thermometer bracket includes a bottom plate 16, which is fixed to the pier top 6. A bottom folding plate 17 that is bent vertically downward is formed on one side of the bottom plate 16. The inner side wall of the bottom folding plate 17 is in contact with the side wall of the pier top 6 to limit the lateral position.

[0048] Specifically, a transition plate 18 is provided on the other side of the bottom plate 16 . The transition plate 18 is bent upward at an angle. A mounting plate 19 is formed on the other side of the transition plate 18 . The mounting plate 19 is parallel to the bottom plate 16 and the pier top 6 .

[0049] Specifically, a middle through hole is formed in the mounting plate 19 , and the middle through hole is used to accommodate the tail of the thermometer and hygrometer 7 . A mounting through hole is formed in the mounting plate 19 , and the mounting through holes are arranged around the middle through hole for fixing the thermometer and hygrometer 7 .

[0050] Specifically, the vertical unidirectional accelerometer 2, the lateral unidirectional accelerometer 3, and the thermometer and hygrometer 7 are all connected to the collection box 5, which is a dynamic data collector. The broadband network of the dynamic data collector transmits data to the on-site industrial computer, and the industrial computer transmits the data to the private cloud monitoring platform through the 4G network module.

[0051] Specifically, the industrial computer is equipped with a remote control PUD module, and users can access the industrial computer through a terminal (computer, pad, smart phone, etc.) to view bridge health monitoring data.

[0052] Specifically, the installation of the vertical unidirectional accelerometer 2 and the lateral unidirectional accelerometer 3 is as follows:

[0053] First, conduct an on-site inspection. Before installing the vertical unidirectional accelerometer 2 and the lateral unidirectional accelerometer 3, a connection test is required to check the integrity of the sensor and the installation shape, position and dimensions of the vertical unidirectional accelerometer 2 and the lateral unidirectional accelerometer 3.

[0054] Then, the accelerometer bracket 10 is adhered to the side wall of the T-beam horseshoe 1 using the structural adhesive 9;

[0055] Then, the vertical unidirectional accelerometer 2 and the lateral unidirectional accelerometer 3 are fixed to the accelerometer bracket 10 by means of overhead bolt and nut assemblies;

[0056] Finally, stainless steel shields of the vertical unidirectional accelerometer 2 and the lateral unidirectional accelerometer 3 are installed to protect the accelerometers.

[0057] Specifically, the installation process of the thermometer and hygrometer 7 is as follows:

[0058] Thermohygrometer 7 inspection

[0059] a. Check whether the thermometer and hygrometer 7 and its accessories are complete and the model is correct;

[0060] b. Check whether the thermometer and its accessories have obvious surface damage, extrusion, bumps, bends, etc.;

[0061] c. Power on the thermometer and hygrometer 7 separately to test whether the output data conforms to the rules;

[0062] d. The analog temperature and humidity meter outputs a 4-20mA current signal.

[0063] Install the thermometer and hygrometer bracket

[0064] The bottom plate 16 is attached to the pier top 6 , while the bottom folding plate 17 is kept in contact with the side wall of the pier top 6 , fixed by the reserved bolts, and the thermometer and hygrometer 7 is installed through the mounting plate 19 .

[0065] Specifically, the laying process of pipeline 4 is as follows:

[0066] First, the installation technical requirements of pipeline 4

[0067] a. To avoid the influence of power induction on instrument measurement and system communication, the power cable of this device cannot be laid in the same protective tube as the sensor cable and communication cable;

[0068] b. When laying cables, sparks must be prevented from splashing onto the cables. Therefore, there must be someone on duty to monitor along the laying line. Before laying cables, the length and list must be checked to prevent the cable from being insufficient in length. The cable reels must be numbered and the numbers of the wires laid must be written down in sequence. Before laying, insulation records of the cables must be made. After laying, each wire must be sorted out. After laying, the ends of the wires must be temporarily sealed with plastic film to prevent moisture from entering.

[0069] c. The cables should be protected by pipes made of Φ30 flame-retardant PVC and laid along the cable duct along the direction of the bridge;

[0070] d. All protective pipes should be connected to the lightning protection grounding system of the main bridge.

[0071] First, the installation plan of pipeline 4

[0072] a. The bridge is fixed to the side wall of the T beam with U-shaped clips;

[0073] b. The power supply cable must be routed separately using Φ30 flame-retardant PVC and is not allowed to be shared with the bridge;

[0074] c. A cable tray can be installed at the location of 4 or more signal cables. The cable tray size is 50*50*1. If there are less than 4 cables, Φ30 flame-retardant PVC should be used for wiring.

[0075] 5) Technical requirements and installation methods for acquisition and transmission equipment

[0076] Specifically, the collection box 5 is installed on the pier top 6 by using expansion screws, avoiding water leakage parts such as expansion joints, and when installing the collection box 5, it should be noted that the wiring holes should face downward.

[0077] Specifically, the prior monitoring device of the present application can be powered by solar panels. The installation process of the solar panels is as follows:

[0078] First, the solar panels ensure that the daily lighting duration is no less than 4 hours;

[0079] Then, the whole surface of the solar bracket should be evenly coated with anti-rust paint, and the material of the anti-rust paint should meet the design requirements;

[0080] Finally, the solar power supply is installed at a suitable position on the top of the pier facing the sun and fixed. The solar bracket is connected to the pier with M10 expansion bolts, and each bolt is equipped with two nuts to ensure that the bracket is firmly fixed.

[0081] The utility model permanently monitors the vertical amplitude and vertical acceleration through two vertical unidirectional accelerometers, and permanently monitors the lateral amplitude and lateral acceleration through two lateral unidirectional accelerometers. It is overhead fixed through an overhead bolt and nut assembly to meet the service life of permanent monitoring. The thermometer and humidity meter bracket is cantilevered to support the thermometer and humidity meter to meet the service life of permanent monitoring.

Claims

1. A long-term online monitoring device for the dynamic performance of a standard railway beam, comprising a T-beam horseshoe (1) in the middle of a standard railway beam span, characterized in that: Two vertical unidirectional accelerometers (2) and two transverse unidirectional accelerometers (3) are arranged on the outside of the T-beam horseshoe (1); the two vertical unidirectional accelerometers (2) respectively measure the vertical amplitude and the vertical acceleration; the two transverse unidirectional accelerometers (3) respectively measure the transverse amplitude and the transverse acceleration; and a thermometer and hygrometer (7) for measuring temperature and humidity is arranged on the pier top (6).

2. The long-term online monitoring device for dynamic performance of a railway standard beam according to claim 1 is characterized by: The vertical unidirectional accelerometer (2) and the lateral unidirectional accelerometer (3) have the same structure, and the vertical unidirectional accelerometer (2) and the lateral unidirectional accelerometer (3) are both fixed by an accelerometer bracket (10).

3. The long-term online monitoring device for dynamic performance of a railway standard beam according to claim 1 is characterized by: The thermometer and hygrometer (7) is fixed on the pier top (6) via a thermometer and hygrometer bracket.

4. The long-term online monitoring device for dynamic performance of a railway standard beam according to claim 1 is characterized in that: A pipeline (4) is arranged outside the railway standard beam, and the pipeline (4) accommodates the connection lines of the vertical unidirectional accelerometer (2) and the transverse unidirectional accelerometer (3).

5. The long-term online monitoring device for dynamic performance of railway standard beam according to claim 4 is characterized by: A collection box (5) is provided on the pier top (6), and the collection box (5) is connected to a vertical unidirectional accelerometer (2), a lateral unidirectional accelerometer (3), and a thermometer and hygrometer (7).

6. The long-term online monitoring device for dynamic performance of railway standard beam according to claim 2 is characterized by: The accelerometer bracket (10) is in the shape of a groove, and the upper end of the accelerometer bracket (10) is transversely bent to form a fixed folded plate, and the fixed folded plate is connected to the steel plate of the railway standard beam.

7. The long-term online monitoring device for dynamic performance of railway standard beam according to claim 6 is characterized by: The fixed folding plate is in surface contact with the steel plate of the railway standard beam, and the contact surfaces of the two are connected by a structural adhesive (9).

8. The long-term online monitoring device for dynamic performance of railway standard beams according to claim 7 is characterized by: The vertical unidirectional accelerometer (2) and the lateral unidirectional accelerometer (3) are connected to the accelerometer bracket (10) via an overhead bolt and nut assembly.

9. The long-term online monitoring device for dynamic performance of railway standard beam according to claim 3 is characterized by: The thermometer and hygrometer bracket is a single-arm suspended bracket, and the thermometer and hygrometer bracket provides suspended support for the thermometer and hygrometer (7).

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