An anti-wind variable-inclination flow guiding structure applicable to bridges

Abstract

The present invention discloses a wind-resistant variable-inclination flow guiding structure applicable to bridges, belonging to the technical field of bridge wind resistance. By setting a closing structure, two flow guiding plates can be adjusted to rotate, changing the flow field characteristics around the cross-section. The closed and drooping flow guiding plates freely rotate between two support columns through a rotating shaft, having a better wind-resistant flow guiding effect and being able to effectively reduce the cross-section vortex amplitude value. Among them, the freely rotating flow guiding plates can change the included angle, having the effect of changing the cross-section flow field and improving the wind vibration performance of the cross-section. According to the structural acceleration response, a rapid state change is made to cope with the low wind speed vortex vibration phenomenon and avoid the reduction of the structural fatigue life caused by wind load.

Description

Technical Field

[0001] The invention belongs to the technical field of bridges, and in particular relates to a wind-resistant variable-angle diversion structure suitable for bridges. Background Art

[0002] Guide plates are common aerodynamic measures in bridge wind engineering. Reasonable forms are conducive to improving the vortex-induced vibration performance of bridges and reducing the vibration amplitude of the cross-section. They are often in the form of a single fixed measure, generally composed of fixed guide plates, with good economy and easy construction. However, fixed guide plates do not necessarily have significant control over the vortex-induced vibration of bridges. L-shaped guide plates with an inclination angle sometimes have better control over the vortex-induced vibration amplitude of the cross-section than horizontal guide plates.

[0003] Under low wind speeds, vortex-induced vibration is prone to occur in bridge sections. Vortex-induced vibration is a repetitive vibration form caused by the periodic shedding of vortices around the section. Continuous vortex-induced vibration can easily reduce the fatigue life of the section and reduce the comfort of pedestrians and vehicles. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a wind-resistant variable-angle guide structure suitable for bridges, which can change the guide structure form according to the acceleration response value when the vortex amplitude is large, reduce the cross-sectional amplitude, and avoid fatigue damage of the cross-sectional components.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The invention comprises two vertical support columns, a guide plate structure is arranged between the two support columns, and the guide plate structure comprises two guide plates and a rotating shaft, and the two guide plates are hinged on the rotating shaft, and the two ends of the rotating shaft are rotatably arranged on the top ends of the two support columns, and an adjusting mechanism is arranged along the support column, and the adjusting mechanism comprises a movable shell, and the movable shell is provided with a through hole, and the support column passes through the through hole to make the movable shell vertically slide on the support column, and a pointed support is arranged on the movable shell, and the pointed support comprises a vertical rod vertically fixed on the shell and two supporting beams obliquely fixed on both sides of the top end of the vertical rod, and two telescopic cylinders are fixed on the shell, and the output end of the telescopic cylinder slides against the bottom side of the edge of the guide plate. When the telescopic cylinder is retracted, the supporting beam is supported on the bottom side of the edge of the guide plate, and the adjusting mechanism moves downward, and the supporting beam moves away from the guide plate, and the two guide plates are close to each other, and the adjusting mechanism moves upward, and the pointed support props up the two guide plates.

[0007] Further, a winding machine is also provided at the upper end of the support column. The winding machine includes a protective housing, a motor, a roller, and a pulling rope. The protective housing is fixed to the side surface of the upper end of the support column. The roller is rotatably arranged inside the protective housing. The motor drives the roller to rotate. The pulling rope is wound around the roller and is connected to the top end of the moving housing.

[0008] Further, the cross-section of the through hole is larger than the cross-section of the support column. A number of steel balls are rotatably arranged inside the through hole around the through hole, and the number of steel balls fit and slide on the side surface of the support column.

[0009] Further, a number of spring pins are also arranged inside the through hole around the through hole. The spring pins protrude from the inner side surface of the through hole and abut against the side surface of the support column. A number of pin holes are provided on the side surface of the top end of the support column. When the adjusting mechanism moves to the top end of the support column, the spring pins are snapped into the pin holes.

[0010] Further, an electric cylinder is arranged inside the support column. A conical surface abutting block is arranged at the output end of the electric cylinder. A blocking block is slidably arranged in the pin hole. Move the conical surface abutting block, and the conical surface abutting block abuts against the blocking block. The blocking block abuts against the spring pin snapped into the pin hole and pushes the spring pin out of the support column. An acceleration sensor is also arranged on the support column, and the acceleration sensor controls the telescoping of the electric cylinder.

[0011] Further, a buffer platform is also provided at the lower end of the support column. The buffer platform includes a seat body and a rubber platform located above the seat body. A spring is connected between the rubber platform and the seat body.

[0012] Further, a bearing is provided at the top end of the support column, and the end of the rotating shaft is arranged on the bearing.

[0013] Further, the free end edges of the two flow guiding plates are chamfered. When the two flow guiding plates are attached, the free ends form a pointed groove.

[0014] Further, a magnetic strip is provided between the free end attachment surfaces of the two flow guiding plates.

[0015] The beneficial effects of the present invention are as follows:

[0016] By providing a closing structure, the present invention enables the two flow guiding plates to be adjusted and rotated, changing the flow field characteristics around the cross-section. The closed and drooping flow guiding plates can freely rotate between the two support columns through the rotating shaft, having a better wind resistance and flow guiding effect, and can effectively reduce the cross-section vortex amplitude value. Among them, the freely rotating flow guiding plates can change the included angle, having the effect of changing the cross-section flow field and improving the wind vibration performance of the cross-section. According to the structural acceleration response, a rapid state change is made to cope with the low wind speed vortex vibration phenomenon and avoid the reduction of the structural fatigue life caused by wind load.

[0017] Other advantages, objects, and features of the present invention will be set forth in the following description, and to some extent will be obvious to those skilled in the art, or can be learned from the practice of the present invention. The objects and other advantages of the present invention can be achieved and obtained through the following description. Brief Description of the Drawings

[0018] In order to make the objectives, technical solutions, and beneficial effects of the present invention clearer, the following drawings are provided to illustrate the present invention:

[0019] Figure 1 Overall schematic diagram of the wind-resistant variable-inclination diversion structure according to an embodiment of the present invention;

[0020] Figure 2 Overall schematic diagram of the adjustment mechanism according to an embodiment of the present invention;

[0021] Figure 3 Diagram of the closing steps of the wind-resistant variable-inclination diversion block according to an embodiment of the present invention;

[0022] Figure 4 Diagram of the opening steps of the wind-resistant variable-inclination diversion block according to an embodiment of the present invention;

[0023] Figure 5 Cross-sectional view of the winding machine according to an embodiment of the present invention;

[0024] Figure 6 First cross-sectional view of the adjustment plate according to an embodiment of the present invention;

[0025] Figure 7 Second cross-sectional view of the adjustment plate according to an embodiment of the present invention;

[0026] Figure 8 Schematic diagram of the buffer table structure according to an embodiment of the present invention;

[0027] The reference signs in the drawings are as follows: 1, support column; 11, pin hole; 12, electric cylinder; 13, conical surface abutment block; 14, stop block; 15, bearing; 2, diversion plate structure; 21, diversion plate; 22, rotating shaft; 3, adjustment mechanism; 31, moving housing; 311, through hole; 32, pointed support; 321, vertical rod; 322, support beam; 33, telescopic cylinder; 34, steel ball; 35, spring pin; 36, support head; 4, winding machine; 41, protective housing; 42, motor; 43, winding roller; 44, pulling rope; 5, acceleration sensor; 6, buffer table; 61, seat body; 62, rubber table; 63, spring. Detailed Description of the Embodiment

[0028] As Figures 1 to 8 shown, the present invention discloses a wind-resistant variable-inclination diversion structure applicable to bridges. Each pair of diversion plates includes two vertical support columns 1. The cross-section of the support column 1 is selected to be cylindrical, as Figure 1and Figure 3 As shown, a guide plate structure 2 is provided between the two support columns 1, and the guide plate structure 2 includes two guide plate blocks 21 and a rotating shaft 22. The two guide plate blocks 21 are hinged on the rotating shaft 22, and the two ends of the rotating shaft 22 are respectively rotatably arranged at the top ends of the two support columns 1. An adjustment mechanism 3 is provided along the support column 1, as shown in FIG. Figure 2 As shown, the adjustment mechanism 3 includes a moving shell 31, the moving shell 31 is provided with a through hole 311, the support column 1 passes through the through hole 311 so that the moving shell 31 is vertically slid on the support column 1, and the moving shell 31 is provided with a pointed support 32, and the pointed support 32 includes a vertical rod 321 vertically fixed on the shell and two supporting beams 322 obliquely fixed on both sides of the top of the vertical rod 321, and two telescopic cylinders 33 are fixed on the shell. Figure 3 and Figure 4 A cylindrical support head 36 is provided at the output end of the telescopic cylinder 33, and the support head 36 slides against the bottom side of the edge of the guide plate 21. When the telescopic cylinder 33 is retracted, the support beam 322 is supported on the bottom side of the edge of the guide plate 21, the adjustment mechanism 3 moves downward, the support beam 322 moves away from the guide plate 21, the two guide plates 21 move closer to each other, the adjustment mechanism 3 moves upward, and the pointed support 32 props up the two guide plates.

[0029] Figure 3 and Figure 4 The figure shows the operation mode of this wind-resistant variable-angle guide structure. When the guide plate is operating normally, the adjustment mechanism 3 moves to the top position of the support column 1, and the support head 36 is pushed to slide against the bottom side of the guide plate 21 by the extension and contraction of the two telescopic cylinders 33. The inclination angle of the two guide plates 21 can be adjusted to maintain the airflow guidance of the guide plates 21 and ensure the flow field characteristics around the main beam; when the cross section undergoes periodic movement, the telescopic cylinder 33 is retracted, the adjustment mechanism 3 moves downward, the pointed support 32 moves away from the two guide plates 21, and the guide plates 21 fit together under the action of gravity. The two guide plates 21 are brought closer together and kept in a drooping state. At this time, the two guide plates 21 are in a free drooping and swinging state. The airflow blows towards the guide plates 21, and the guide plates swing with the wind, changing the trajectory of the airflow around the cross section, so as to avoid the periodic vibration of the cross section; when the vortex vibration phenomenon disappears, the guide plates 21 are in a free drooping state. At this time, the adjustment structure is moved upward, the pointed support 32 is moved upward, and the two guide plates 21 are separated, so that the two guide plates 21 are rotated upward respectively. After the adjustment structure moves to the upper end of the support column 1, the telescopic cylinder 33 works, and the guide plates 21 can restore to their original working state.

[0030] In this solution, by setting up a closing structure, the two diversion plates 21 can be adjusted to rotate, improving the overall wind vibration performance of the cross-section. After the diversion plates 21 are folded and drooped, they can freely rotate between the two support columns 1 through the rotating shafts 22, having a better wind resistance and diversion effect, and avoiding the periodic movement of the cross-section distance. Among them, the folding and closing of the diversion plates have the effect of changing the air flow trajectory, and the freely rotating diversion plates can change the angle with the wind, further affecting the flow field characteristics around the cross-section. The adjustment mechanism 3 can not only adjust the working inclination angle of the diversion plates 21, but also support and unload the diversion plates 21, enabling this structure to quickly change its state to cope with the occurrence of vortex vibration and reducing the occurrence of damage to the cross-section components.

[0031] In a further solution, as Figure 1 and Figure 5 described, a winch 4 is further provided at the upper end of the support column 1. The winch 4 includes a protective housing 41, a motor 42, a roller 43, and a pulling rope 44. The protective housing 41 is fixed on the side surface of the upper end of the support column 1. The roller 43 is rotatably arranged inside the protective housing 41. The motor 42 drives the roller 43 to rotate. The pulling rope 44 is wound around the roller 43, and the pulling rope 44 is connected to the top end of the moving housing 31.

[0032] In this solution, by driving the rotation of the roller 43 by the motor 42, the downward-moved adjustment mechanism 3 can be pulled up, and the motor 42 unloads the force, and the adjustment mechanism 3 moves downward. Compared with other transmission structures, this structure can move the adjustment mechanism 3 faster and more smoothly. In the case of a smooth surface of the support column 1, it can ensure the smooth movement of the adjustment mechanism 3. This structure is small in volume and long in moving distance, suitable for the movement of the adjustment mechanism 3. Compared with other transmission structures, this structure is not easily stuck by sand and wind and is not easily damaged by wind force.

[0033] In a further solution, as Figure 6 and Figure 7 shown, the cross-section of the perforation 311 is larger than the cross-section of the support column 1. A number of steel balls 34 are rotatably arranged inside the perforation 311 around the inner side. Inside the perforation 311, there are three layers of steel ball 34 structures, and each layer of steel ball 34 structure has three steel balls 34. The three steel balls 34 are evenly distributed around the support column 1, and all the steel balls 34 are in sliding contact with the side surface of the support column 1.

[0034] This structure, by setting the perforation 311 with a cross-section larger than that of the support column 1 and the steel balls 34 rolling on the surface of the support column 1, avoids the wear of the support column 1 by the large-area surface of the moving housing 31. Through the accommodation of the perforation 311 and the limitation of the steel balls 34, it can ensure that the moving housing 31 moves vertically along the support column 1 without shaking, with smooth movement, saving effort and electricity.

[0035] In a further solution, as Figure 6And Figure 7 As shown, three ejector pins 35 are further provided inside the perforation 311. The three ejector pins 35 are evenly arranged around the outside of the support column 1. The ejector pins 35 extend from the inner side of the perforation 311 and abut against the side of the support column 1. Three pin holes 11 are provided on the side of the top end of the support column 1. When the adjusting mechanism 3 moves to the top end of the support column 1, the ejector pins 35 are snapped into the pin holes 11.

[0036] In this structure, through the positioning of the pin holes 11 and the ejector pins 35, it can ensure that when the adjusting mechanism 3 supports the diversion plate 21 at the top end of the support column 1, the height remains unchanged. After the ejector pins 35 are snapped into the pin holes 11, the motor 42 is powered off, and the adjusting mechanism 3 is still fixed at the upper end of the support column 1, ensuring the stable telescopic support of the telescopic cylinder 33 and the stable angle change of the diversion plate 21.

[0037] In a further solution, as Figure 6 And Figure 7 As shown, an electric cylinder 12 is provided inside the support column 1. A conical surface abutting block 13 is provided at the output end of the electric cylinder 12. A blocking block 14 is slidably arranged in the pin hole 11. When the conical surface abutting block 13 is moved, the conical surface abutting block 13 abuts against the blocking block 14. The blocking block 14 abuts against the ejector pin 35 snapped into the pin hole 11 and pushes the ejector pin 35 out of the support column 1. An acceleration sensor 5 is also provided on the support column 1. The acceleration sensor 5 is an existing device and will not be described in detail for the time being. The acceleration sensor 5 controls the telescopic movement of the electric cylinder 12.

[0038] In this solution, by setting the acceleration sensor 5, the magnitude of the acceleration can be correctly sensed. By setting the acceleration value, when the acceleration exceeds the limit value, the acceleration sensor 5 controls the electric cylinder 12 to move, lower the conical surface abutting block 13, and push all the blocking blocks 14 outwards. The blocking blocks 14 push the ejector pins 35 out of the side of the support column 1 along the pin holes 11. Under the action of gravity, the adjusting mechanism 3 directly drops, and the diversion plate 21 loses support and quickly turns down and closes. This structure can set the acceleration value and push out the ejector pins 35 to realize the state control of the acceleration against the wind variable inclination diversion structure.

[0039] In a further solution, as Figure 1 And Figure 8 As shown, a buffer table 6 is further provided at the lower end of the support column 1. The buffer table 6 includes a base body 61 and a rubber table 62 located above the base body 61. A spring 63 is connected between the rubber table 62 and the base body 61. By providing the buffer table 6, it can avoid equipment damage caused by the hard collision when the adjusting mechanism 3 drops.

[0040] In a further solution, as Figure 7As shown, a bearing 15 is provided at the top of the support column 1, and the end of the rotating shaft 22 is arranged on the bearing 15. The bearing 15 is selected as a smooth ball bearing 15 or a roller bearing 15. With the support of the bearing 15, the flexible rotation of the rotating shaft 22 can be ensured, and the flexible swing of the flow guiding plate 21 can be ensured.

[0041] In a further solution, as Figure 3 and Figure 4 shown, the free end edges of the two flow guiding plates 21 are chamfered. When the two flow guiding plates 21 are fitted, the free ends form a pointed groove, which is convenient for the pointed support 32 to separate the flow guiding plates 21 when the adjusting mechanism 3 moves upward. Even in weak winds, the pointed support 32 caused by the slight swing of the flow guiding plate can also be inserted between the two flow guiding plates.

[0042] In a further solution, a magnetic strip is provided between the fitting surfaces of the free ends of the two flow guiding plates 21. By setting the magnetic strip, the relative adsorption force between the two flow guiding plates 21 can be ensured when they are closed, and the collision damage caused by the separation and approach of the two flow guiding plates when they are rotated by the wind can be avoided.

[0043] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A wind-resistant variable-angle diversion structure suitable for bridges. Features: The invention comprises two vertical support columns (1), a flow guide structure (2) is provided between the two support columns (1), the flow guide structure (2) comprises two flow guide plates (21) and a rotating shaft (22), the two flow guide plates (21) are hinged on the rotating shaft (22), the two ends of the rotating shaft (22) are respectively rotatably arranged on the top ends of the two support columns (1), an adjustment mechanism (3) is provided along the support column (1), the adjustment mechanism (3) comprises a movable shell (31), the movable shell (31) is provided with a through hole (311), the support column (1) passes through the through hole (311) so that the movable shell (31) is vertically slidably arranged on the support column (1), and the movable shell (31) is provided with A pointed support (32), the pointed support (32) comprising a vertical rod (321) fixed vertically on the shell and two supporting beams (322) fixed obliquely on both sides of the top of the vertical rod (321), two telescopic cylinders (33) are fixedly arranged on the shell, the output ends of the telescopic cylinders (33) slide against the bottom side of the edge of the guide plate (21), when the telescopic cylinders (33) are retracted, the supporting beams (322) support the bottom side of the edge of the guide plate (21), the adjustment mechanism (3) moves downward, the supporting beams (322) move away from the guide plate (21), the two guide plates (21) move closer to each other, the adjustment mechanism (3) moves upward, and the pointed support (32) props up the two guide plates.

2. The wind-resistant variable-angle guide structure suitable for bridges according to claim 1, Features: A winder (4) is also provided at the upper end of the support column (1), and the winder (4) comprises a protective shell (41), a motor (42), a roller (43) and a pull rope (44). The protective shell (41) is fixed to the side surface of the upper end of the support column (1), and the roller (43) is rotatably arranged inside the protective shell (41). The motor (42) drives the roller (43) to rotate, and the pull rope (44) is wound around the roller (43), and the pull rope (44) is connected to the top of the movable shell (31).

3. The wind-resistant variable-angle guide structure suitable for bridges according to claim 1, Features: The cross section of the through hole (311) is larger than the cross section of the support column (1), and a plurality of steel balls (34) are rotatably arranged around the inner side of the through hole (311), and the plurality of steel balls (34) fit and slide on the side of the support column (1).

4. The wind-resistant variable-angle diversion structure suitable for bridges according to claim 1, Features: A plurality of spring pins (35) are arranged around the inner side of the through hole (311). The spring pins (35) extend from the inner side of the through hole (311) and abut against the side of the support column (1). A plurality of pin holes (11) are arranged on the side of the top end of the support column (1). When the adjustment mechanism (3) moves to the top end of the support column (1), the spring pins (35) are inserted into the pin holes (11).

5. The wind-resistant variable-inclination flow guiding structure applicable to bridges according to claim 4, characterized in that: an electric cylinder (12) is arranged inside the support column (1), a conical surface abutting block (13) is arranged at the output end of the electric cylinder (12), a blocking block (14) is slidably arranged in the pin hole (11), when the conical surface abutting block (13) is moved, the conical surface abutting block (13) abuts against the blocking block (14), the blocking block (14) abuts against and presses out the spring pin (35) clamped in the pin hole (11) from the support column (1), and an acceleration sensor (5) is further arranged on the support column (1), and the acceleration sensor (5) controls the telescopic movement of the electric cylinder (12).

6. The wind-resistant variable-inclination flow guiding structure applicable to bridges according to claim 1, characterized in that: a buffer platform (6) is further arranged at the low end of the support column (1), the buffer platform (6) comprises a seat body (61) and a rubber platform (62) located above the seat body (61), and a spring (63) is connected between the rubber platform (62) and the seat body (61).

7. The wind-resistant variable-inclination flow guiding structure applicable to bridges according to claim 1, characterized in that: a bearing (15) is arranged at the top end of the support column (1), and the end of the rotating shaft (22) is arranged on the bearing (15).

8. The wind-resistant variable-inclination flow guiding structure applicable to bridges according to claim 1, characterized in that: the free end edges of the two flow guiding plates (21) are chamfered, and when the two flow guiding plates (21) are attached, the free ends form a pointed groove.

9. The wind-resistant variable-inclination flow guiding structure applicable to bridges according to claim 1, characterized in that: a magnetic attraction strip is arranged between the attaching surfaces of the free ends of the two flow guiding plates (21).

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