A variable aerodynamic shape steel structure bridge sidewalk guardrail

Abstract

The present application relates to the technical field of guardrails, and particularly relates to a steel structure bridge sidewalk guardrail with changeable aerodynamic shape, which comprises a cross beam, a longitudinal beam, a blade guardrail, a rotating shaft and a rotating shaft two, the two ends of the cross beam are respectively connected with a longitudinal beam, a cross beam two is connected between the two longitudinal beams, the cross beam two is arranged below the cross beam, the bottom of each rotating shaft two is rotationally connected with the top of the cross beam two, the top of each rotating shaft two is connected with the bottom of the rotating shaft through the blade guardrail, and the side wall of the rotating shaft is rotationally connected with the mounting hole of the cross beam bottom, when the blade guardrail device is blown by the wind, the rotating shaft is rotationally connected with the cross beam bottom, the rotating shaft two is rotationally connected with the top of the cross beam two, therefore, the included angle between the blade guardrail and the device can be changed according to the actual wind direction, the aerodynamic shape of the bridge can be changed at any time according to the wind direction, and finally the adjustment of the overall force of the device is realized, and the damage of the structure of the device in the environment with high wind speed is prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of guardrails, in particular to a steel structure bridge sidewalk guardrail with changeable aerodynamic shape. BACKGROUND

[0002] Bridge sidewalk guardrails are protective facilities installed on the edges of bridge sidewalks, aiming to protect pedestrians from accidental falling and prevent vehicles from causing harm to pedestrians. They are important components of bridge structures, usually made of metal, reinforced concrete or other durable materials.

[0003] However, the prior art still has deficiencies, such as patent number CN202321991195.1, a bridge sidewalk guardrail, including two upright columns, an upper crossbeam is arranged between the two upright columns and penetrates the two sides of the upright columns near the top, three middle and lower crossbeams are arranged between the two upright columns and penetrate the inner sides of the upright columns near the middle and lower ends, a plurality of upright rods are fixedly installed between the lower two middle and lower crossbeams, three butt joints are fixedly welded to the outer side of the upright column near the middle and lower ends, a base is fixedly welded to the outer side of the upright column near the bottom, a butt joint is formed in the upper and lower ends of the butt joint and the top surface of the base, and a same connecting rod is arranged inside the three butt joints on the same vertical line. The device is affected by its structure and is prone to damage when used in an environment with high wind speed. SUMMARY

[0004] The present application provides a steel structure bridge sidewalk guardrail with changeable aerodynamic shape to solve the problems in the background art.

[0005] To achieve the above-mentioned application purposes, the present application provides the following technical solutions: a steel structure bridge sidewalk guardrail with changeable aerodynamic shape, comprising: a crossbeam, a longitudinal beam, a blade guardrail, a pivot, and a pivot two, both ends of the crossbeam are connected with a longitudinal beam respectively, a crossbeam two is connected between the two longitudinal beams, the crossbeam two is arranged below the crossbeam, the bottom of each pivot two is rotatably connected with the top of the crossbeam two, the top of each pivot two is connected with the bottom of the pivot through the blade guardrail, and the mounting hole of the pivot side wall is rotatably connected with the bottom of the crossbeam.

[0006] Preferably, the cross section of the blade guardrail is specifically rhombus, and the intersection of the two sides of the rhombus is provided with a round corner.

[0007] Preferably, a round corner two is arranged between the top of the blade guardrail and the pivot, and a round corner three is arranged between the bottom of the blade guardrail and the pivot two.

[0008] Preferably, a gear is connected to the pivot, the gear is meshingly connected with a rack, the rack is slidingly connected in the crossbeam, both ends of the rack are connected with the end of a spring respectively, and the other end of the spring is connected with a pressure adjusting mechanism.

[0009] Preferably, the pressure regulating mechanism comprises a tank, a pipeline and a pressure shell, the tank is connected in the beam, the tank is filled with hydraulic oil, a plurality of round holes are formed in the bottom of the tank, a rotating shaft is sealingly arranged in each round hole, a through hole is formed in the top of the rotating shaft arranged in the tank, the through hole is communicated with the storage cavity in the inside of the blade guardrail, the two ends of the tank are connected with the end of the pipeline, and the other end of the pipeline is connected with the pressure shell.

[0010] Preferably, the pressure regulating mechanism further comprises a second spring, a piston, a push rod, an extrusion block and a second extrusion block, the piston is sealingly arranged in the pressure shell, a pressure cavity is formed between the bottom of the piston and the inner wall of the pressure shell, the other end of the pipeline is communicated with the pressure cavity, the top of the piston is connected with the inner wall of the pressure shell through the second spring, the bottom of the piston is connected with the top of the push rod, the push rod is slidingly sealed with the guide hole in the bottom of the pressure shell, the bottom of the push rod arranged below the pressure shell is connected with the top of the extrusion block, the bottom end of the extrusion block is provided with a chamfer, the chamfer is arranged towards the tank, the chamfer is slidingly matched with a second chamfer, the second chamfer is arranged on the top of the second extrusion block, the extrusion block and the second extrusion block are slidingly connected with the inner wall of the longitudinal beam, and the second extrusion block is connected with the other end of the spring.

[0011] Preferably, the longitudinal beam is provided with a reinforcing plate and a second reinforcing plate.

[0012] Preferably, the longitudinal beam is provided with a third rotating shaft, the end of the third rotating shaft arranged in the longitudinal beam is connected with a bevel gear, the bevel gear is meshingly connected with a second bevel gear, the second bevel gear is connected with the top of a sleeve, the sleeve is rotatingly sealed with the reinforcing plate and the second reinforcing plate, the bottom of the sleeve arranged below the second reinforcing plate is slidingly connected with a spline shaft, the bottom of the spline shaft is connected with the top of a screw rod, the screw rod is threadedly connected with the longitudinal beam, the bottom of the screw rod is connected with the top of a drill rod, and the bottom of the drill rod is arranged in the opening in the bottom of the longitudinal beam.

[0013] Preferably, the drill rod is provided with a tapered column, each side wall of the longitudinal beam is provided with a second guide hole, the second guide hole is slidingly connected with a plug rod, the end of the plug rod arranged in the longitudinal beam is connected with a third extrusion block, the chamfer of the top of the third extrusion block is arranged towards the tapered slope of the bottom of the tapered column, and the third extrusion block is connected with the longitudinal beam through a third spring.

[0014] Preferably, a stress guide groove is annularly arranged on the longitudinal beam, and the stress guide groove is arranged between the reinforcing plate and the second reinforcing plate.

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

[0016] In the scheme of the present application:

[0017] When the blade guard device is blown by wind, the rotating shaft is rotatably connected with the bottom of the cross beam, and the rotating shaft two is rotatably connected with the top of the cross beam two, so that the included angle between the blade guard and the device can be changed according to the actual wind direction, and then the aerodynamic shape of the bridge can be changed at any time along with the wind direction, finally the overall stress adjustment of the device is realized, and the structure damage of the device is prevented when the device is used in the environment with large wind speed. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic view of the main structure of the present application;

[0019] Figure 2 It is a schematic view of the blade guard structure of the present application;

[0020] Figure 3 It is a sectional view of the blade guard of the present application;

[0021] Figure 4 It is a sectional view of the storage tank of the present application;

[0022] Figure 5 It is a sectional view of the pressure shell of the present application;

[0023] Figure 6 It is a schematic view of the meshing connection relationship between the bevel gear and the second bevel gear of the present application;

[0024] Figure 7 It is a schematic view of the connection relationship between the connecting pipe and the second connecting pipe and the longitudinal beam of the present application;

[0025] Figure 8 It is a sectional view of the limiting pipe of the present application;

[0026] Figure 9 It is a schematic view of the connection relationship between the longitudinal beam and the auxiliary longitudinal beam of the present application;

[0027] Figure 10 It is a schematic view of the connection relationship between the mounting ring and the torsion spring of the present application;

[0028] Figure 11 It is a sectional view of the gas storage tank of the present application;

[0029] Figure 12 It is a schematic view of the connection relationship between the mounting pipe and the air bag of the present application;

[0030] Figure 13 It is a schematic view of the sliding connection relationship between the locking pipe and the locking column of the present application;

[0031] Figure 14 It is a schematic view of the connection relationship between the locking column, the tension spring and the second mounting ring of the present application;

[0032] Figure 15 It is a schematic view of the connection relationship between the pull rod and the stop block of the present application.

[0033] Wherein: crossbeam 1, longitudinal beam 2, blade guardrail 3, rotating shaft 4, rotating shaft two 5, gear 6, rack 7, spring 8, storage tank 9, pipeline 10, pressure shell 11, spring two 12, piston 13, push rod 14, extrusion block 15, extrusion block two 16, reinforcing plate 17, reinforcing plate two 18, rotating shaft three 19, bevel gear 20, bevel gear two 21, sleeve 22, spline shaft 23, screw 24, drill rod 25, tapered column 26, insertion rod 27, extrusion block three 28, spring three 29, stress guide groove 30, connecting pipe 31, connecting pipe two 32, round groove 33, round groove two 34, sliding groove 35, sliding groove two 36, bolt 37, bolt two 38, limiting pipe 39, auxiliary longitudinal beam 40, storage pipe 41, mounting pipe 42, mounting ring 43, torsional spring 44, sleeve pipe 45, connecting pipe 46, gas storage tank 47, gas inlet hole 48, gas guide cavity 49, air bag 50, locking pipe 51, locking column 52, gas guide through hole 53, pressure pipe 54, tension spring 55, mounting ring two 56, pull rod 57, stop block 58, limiting rod 59. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present application will be described below in conjunction with the accompanying drawings, and it should be understood that the preferred embodiments described herein are only used to explain and illustrate the present application, and are not used to limit the present application.

[0035] Embodiment one: reference Figures 1-15 A steel structure bridge sidewalk guardrail with variable aerodynamic shape, comprising: crossbeam 1, longitudinal beam 2, blade guardrail 3, rotating shaft 4 and rotating shaft two 5, both ends of the crossbeam 1 are connected with a longitudinal beam 2 respectively, a crossbeam two is connected between the two longitudinal beams 2, the crossbeam two is arranged below the crossbeam 1, the bottom of each rotating shaft two 5 is rotatably connected with the top of the crossbeam two, the top of each rotating shaft two 5 is rotatably connected with the bottom of the rotating shaft 4 through the blade guardrail 3, and the side wall of the rotating shaft 4 is rotatably connected with the mounting hole at the bottom of the crossbeam 1.

[0036] The principle and beneficial effects of the above scheme are:

[0037] Both ends of the crossbeam 1 are connected with a longitudinal beam 2 respectively, the two longitudinal beams 2 are connected through a crossbeam two, the bottom of the longitudinal beam 2 is mounted on the bridge, when the blade guardrail 3 device is blown by the wind, the rotating shaft 4 is rotatably connected with the bottom of the crossbeam 1, and the rotating shaft two 5 is rotatably connected with the top of the crossbeam two, so that the included angle between the blade guardrail 3 and the device can be changed according to the actual wind direction, thereby the aerodynamic shape of the bridge can be changed at any time according to the wind direction, and finally the overall force of the device is adjusted, so that the structure is prevented from being damaged when the device is used in an environment with high wind speed.

[0038] Embodiment two: reference Figures 1-15 The cross section of the blade guardrail 3 is specifically a rhombus, and the intersection of the two edges of the rhombus is provided with a round corner.

[0039] The principles and beneficial effects of the above scheme are:

[0040] By setting the intersection of the two edges as a rounded corner, the flexibility of the structure can be increased, preventing scratches on pedestrians or vehicles when the device is in use.

[0041] Example Three: Reference Figures 1-15 A rounded corner two is provided between the top of the blade guard 3 and the rotating shaft 4, and a rounded corner three is provided between the bottom of the blade guard 3 and the rotating shaft two 5.

[0042] The principles and beneficial effects of the above scheme are:

[0043] Because a rounded corner two is provided between the top of the blade guard 3 and the rotating shaft 4, and a rounded corner three is provided between the bottom of the blade guard 3 and the rotating shaft two 5, the operator can be prevented from being scratched during installation of the blade guard 3, further improving the safety of the device.

[0044] Example Four: Reference Figures 1-15 A gear 6 is connected to the rotating shaft 4, the gear 6 is engaged with the rack 7, the rack 7 is slidingly connected in the cross beam 1, the ends of the rack 7 are respectively connected to the ends of a spring 8, and the other end of the spring 8 is connected to a pressure adjusting mechanism.

[0045] The principles and beneficial effects of the above scheme are:

[0046] When the blade guard 3 rotates, the gear 6 connected to the rotating shaft 4 is engaged with the rack 7, and the rack 7 slides in the cross beam 1. Because the ends of the rack 7 are respectively connected to the ends of a spring 8, and the other end of the spring 8 is connected to a pressure adjusting mechanism, when the blade guard 3 drives the rack 7 to move in the cross beam 1 in one direction, one spring 8 is stretched and the other spring 8 is compressed, preventing the blade guard 3 from moving excessively and not being able to reset. At the same time, it can provide cushioning for the movement of the blade guard 3. When it is blown by the wind, it can quickly change the aerodynamic shape of the device. When it rotates to the limit, it can prevent the impact force from impacting the entire device, further avoiding noise caused by vibration during use.

[0047] Example Five: Reference Figures 1-15 The pressure adjusting mechanism includes a tank 9, a pipe 10 and a pressure shell 11, the cross beam 1 is connected with the tank 9, the tank 9 is filled with hydraulic oil, a plurality of round holes are opened at the bottom of the tank 9, each round hole is rotatably sealed with a rotating shaft 4, the rotating shaft 4 is disposed at the top of the tank 9 and has a through hole, the through hole is in communication with the storage cavity inside the blade guard 3, and the ends of the pipe 10 are connected to the tank 9, and the other end of the pipe 10 is connected to the pressure shell 11.

[0048] The principles and beneficial effects of the above scheme are:

[0049] The storage cavity in the blade guard 3 is communicated with the storage tank 9 through the through hole on the rotating shaft 4, so that the storage tank 9, the through hole and the storage cavity are filled with hydraulic oil. The filling of the hydraulic oil can increase the heat preservation effect of the blade guard 3, prevent the blade guard 3 from expanding at high temperature and shrinking at low temperature, and thus avoid the deformation of the structure of the blade guard 3 due to temperature change, which causes the device to be stuck and unable to work normally. After the hydraulic oil is added, the stability of the blade guard 3 is also increased. On the premise that the blade guard 3 can change the windward angle in time with the change of the wind direction, the blade guard 3 is prevented from rotating frequently, the friction between the rotating shaft 4, the rotating shaft 2 and the beams 1 and 2 is reduced, and the service life of the device is improved. When the device works at high temperature, part of the hydraulic oil enters the pressure shell 11 through the pipeline 10, thereby preventing the structure from being damaged due to excessive pressure in the blade guard 3.

[0050] Embodiment six: referring to Figures 1-15 The pressure regulating mechanism further comprises a second spring 12, a piston 13, a push rod 14, a pressing block 15 and a second pressing block 16. The piston 13 is slidingly sealed in the pressure shell 11, and a pressure cavity is formed between the bottom of the piston 13 and the inner wall of the pressure shell 11. The other end of the pipeline 10 is arranged in communication with the pressure cavity. The top of the piston 13 is connected to the inner wall of the pressure shell 11 through the second spring 12. The bottom of the piston 13 is connected to the top of the push rod 14. The push rod 14 is slidingly sealed with the guide hole at the bottom of the pressure shell 11. The push rod 14 is arranged below the bottom of the pressure shell 11 and connected to the top of the pressing block 15. The bottom end of the pressing block 15 is provided with a chamfer, which is arranged towards the storage tank 9 and slidingly matched with a second chamfer. The second chamfer is arranged on the top of the second pressing block 16. The pressing block 15 and the second pressing block 16 are both slidingly connected to the inner wall of the longitudinal beam 2. The second pressing block 16 is connected to the other end of the spring 8.

[0051] The principle and beneficial effects of the above-mentioned scheme are as follows:

[0052] When the environmental temperature is too high, the hydraulic oil enters the pressure cavity in the pressure shell 11 through the pipeline 10. The piston 13 moves upward, the second spring 12 contracts, the push rod 14 and the pressing block 15 move upward, the chamfer is slidingly matched with the second chamfer, and the heated spring 8 moves the second pressing block 16 away from the middle of the beam 1. This prevents the spring 8 from having too much elasticity at high temperature, which causes the rack 7 to be unable to be driven by the gear 6 in time and prevents the blade guard 3 from rotating. When the environmental temperature is too low, the hydraulic oil in the pressure cavity enters the storage tank 9 through the pipeline 10. The piston 13 moves downward, the second spring 12 lengthens, the push rod 14 and the pressing block 15 move downward, the chamfer is slidingly matched with the second chamfer, and the second pressing block 16 moves towards the middle of the beam 1. The length of the spring 8 is shortened under the cooperation of the two second pressing blocks 16, which prevents the spring 8 from contracting too much at low temperature. The second pressing block 16 moves between the two pressing blocks 15, which causes the rack 7 to have no stable force point, thereby avoiding the blade guard 3 from rotating frequently and improving the stability of the device.

[0053] Embodiment seven: refer to Figures 1-15 Each of the longitudinal beam 2 is provided with reinforcing plate 17 and reinforcing plate two 18, reinforcing plate two 18 is arranged below reinforcing plate 17.

[0054] The principle and beneficial effects of the above scheme are:

[0055] The setting of reinforcing plate 17 and reinforcing plate two 18 increases the structural strength of the longitudinal beam 2.

[0056] Embodiment eight: refer to Figures 1-15 , the longitudinal beam 2 is rotatably connected with the shaft three 19, the shaft three 19 is arranged in the end of the longitudinal beam 2 and is connected with the bevel gear 20, the bevel gear 20 is engaged with the bevel gear two 21, the bevel gear two 21 is connected with the top of the sleeve 22, the sleeve 22 is rotatably sealed with the reinforcing plate 17 and the reinforcing plate two 18 respectively, the bottom of the sleeve 22 arranged below the reinforcing plate two 18 is slidably connected with the spline shaft 23, the bottom of the spline shaft 23 is connected with the top of the screw 24, the screw 24 is threadedly connected with the longitudinal beam 2, the bottom of the screw 24 is connected with the top of the drill rod 25, and the bottom of the drill rod 25 is arranged in the opening at the bottom of the longitudinal beam 2.

[0057] The principle and beneficial effects of the above scheme are:

[0058] When installing the device on the bridge, the bottom of the longitudinal beam 2 is inserted into the concrete installation hole of the bridge, and a downward pressure is applied to the top of the device, then the shaft three 19 is rotated, the bevel gear 20 on the shaft three 19 drives the bevel gear two 21 connected therewith to rotate, the sleeve 22 rotates on the reinforcing plate 17 and the reinforcing plate two 18, the spline shaft 23 is slidably connected in the bottom end of the sleeve 22 below the reinforcing plate two 18, the spline shaft 23 rotates synchronously, the spline shaft 23 drives the screw 24 to rotate, the screw 24 is threadedly connected with the longitudinal beam 2, so that the screw 24 drives the spline shaft 23 to move downward relative to the longitudinal beam 2 while rotating, the drill rod 25 connected with the bottom of the screw 24 drills the concrete installation hole and is inserted into the drilled hole, thereby improving the longitudinal stability and safety of the device after installation, and the device can have higher load capacity against wind force.

[0059] Embodiment nine: refer to Figures 1-15 , the drill rod 25 is provided with a tapered column 26, each side wall of the longitudinal beam 2 is provided with a guide hole two, the guide hole two is slidably connected with the insertion rod 27, the insertion rod 27 arranged in the end of the longitudinal beam 2 is connected with the extrusion block three 28, the chamfer three at the top of the extrusion block three 28 is arranged towards the tapered inclined surface at the bottom of the tapered column 26, and the extrusion block three 28 is connected with the longitudinal beam 2 through the spring three 29.

[0060] The principle and beneficial effects of the above scheme are:

[0061] When the drill rod 25 moves downward, the conical column 26 moves downward, and the conical slope contacts the chamfer three on the top of the extrusion block three 28, so that the extrusion block three 28 drives the insertion rod 27 to move along the guide hole two to the outside of the longitudinal beam 2, and the spring three 29 is compressed. After the insertion rod 27 moves, the end of the insertion rod 27 is in contact with the inner wall of the concrete mounting hole, which improves the transverse stability of the device after installation.

[0062] Embodiment ten: Figures 1-15 The stress guide groove 30 is arranged between the reinforcing plate 17 and the reinforcing plate two 18.

[0063] The principle and beneficial effects of the above scheme are:

[0064] When the device is in use, it may be hit by a vehicle, so as to protect the safety of pedestrians on the sidewalk, the stress guide groove 30 is arranged on each longitudinal beam 2, and the bottom of the longitudinal beam 2 is firmly inserted into the concrete mounting hole under the cooperation of the drill rod 25 and the insertion rod 27. The arrangement of the stress guide groove 30 can absorb and buffer the stress after the impact, guide the deformation caused by the stress, make the upper part of the longitudinal beam 2 bend towards the lower part, and avoid the impact of the longitudinal beam 2 on pedestrians.

[0065] Embodiment eleven: Figures 1-15 The stress guide groove 30 is arranged on the stress guide groove 30, and the connecting pipe 31 is arranged above the connecting pipe two 32. The connecting pipe 31 and the connecting pipe two 32 are connected with the longitudinal beam 2. A plurality of circular grooves 33 are longitudinally arranged on the side wall of the connecting pipe 31, and the diameter of the circular grooves 33 gradually decreases from top to bottom. A plurality of circular grooves two 34 are longitudinally arranged on the side wall of the connecting pipe two 32, and the diameter of the circular grooves two 34 gradually decreases from bottom to top. The two adjacent circular grooves 33 are connected by a sliding groove 35, and the two adjacent circular grooves two 34 are connected by a sliding groove two 36. The largest diameter circular groove 33 is inserted with the nut of the bolt 37, the largest diameter circular groove two 34 is inserted with the nut of the bolt two 38, the threaded part of the bolt 37 and the threaded part of the bolt two 38 are screwed with the limiting pipe 39, the inner wall of the limiting pipe 39 is in contact with the side wall of the connecting pipe 31 and the connecting pipe two 32, the threaded part of the bolt 37 is screwed with a nut, and the nut is in contact with the side wall of the limiting pipe 39 through the lock washer. The threaded part of the bolt two 38 is screwed with a nut two, and the nut two is in contact with the side wall of the limiting pipe 39 through the lock washer two.

[0066] The principle and beneficial effects of the above scheme are:

[0067] The limiting tube 39 is inserted and matched with the largest diameter circular groove 33 through the screw cap of the bolt 37, and the largest diameter circular groove 2 34 through the screw cap of the bolt 2 38. The bolt 37 and the bolt 2 38 are both threaded with the limiting tube 39. The threaded part of the bolt 37 is threaded with a nut, which is in contact with the side wall of the limiting tube 39 through the lock washer. The threaded part of the bolt 2 38 is threaded with a nut 2, which is in contact with the side wall of the limiting tube 39 through the lock washer 2. Therefore, the limiting tube 39 can be firmly installed on the connecting pipe 31 and the connecting pipe 2 32. When the impact force on the device is too large, or the two longitudinal beams 2 are bent towards each other after the leaf guardrail 3 is hit, the stress guide groove 30 breaks, and the connecting pipe 31 and the connecting pipe 2 32 move in opposite directions. At this time, the screw cap of the bolt 37 moves downward from the largest diameter circular groove 33 and moves to the remaining circular grooves 33 through the guide of the sliding groove 35. The screw cap of the bolt 2 38 moves upward from the largest diameter circular groove 2 34 and moves to the remaining circular grooves 2 34 through the guide of the sliding groove 2 36. At this time, the diameter of the bottom of the connecting pipe 31 becomes larger, the diameter of the top of the connecting pipe 2 32 becomes larger, and the inner wall of the limiting tube 39 is extruded. Therefore, the longitudinal beams 2 after the stress guide groove 30 is torn can still be connected together through the limiting tube 39, preventing the threat to the safety of pedestrians caused by the flying of parts of the device. At the same time, the two screw caps move to the remaining circular grooves 33 and circular grooves 2 34 through the guides of the sliding groove 35 and the sliding groove 2 36, respectively, continuously dissipating the stress on the device and effectively buffering and absorbing the impact of the vehicle. It can also ensure that the remaining parts in the device will not be damaged by excessive stress. After the limiting tube 39 is installed on the connecting pipe 31 and the connecting pipe 2 32, the nut is in contact with the side wall of the limiting tube 39 through the lock washer, and the nut 2 is in contact with the side wall of the limiting tube 39 through the lock washer 2. Therefore, when the device is affected by the wind, the loosening of the limiting tube 39 caused by the vibration of the device will not occur. Further, it can effectively absorb the impact after the device is subjected to a large impact force. The existing parts are fully utilized in the mechanism, greatly reducing the difficulty and cost of manufacturing the device.

[0068] Embodiment twelve: reference Figures 1-15Each of the side of the longitudinal beam 2 is mounted with an auxiliary longitudinal beam 40, two auxiliary longitudinal beams 40 are connected with a receiving tube 41, the receiving tube 41 is provided with a mounting tube 42, the end of the mounting tube 42 is rotatably connected with the inner wall of the auxiliary longitudinal beam 40, two mounting rings 43 are mounted on the mounting tube 42, each mounting ring 43 is connected with the inner wall of the auxiliary longitudinal beam 40 through a torsion spring 44, two sleeve pipes 45 are rotatably sealed on the mounting tube 42, the inner wall of each sleeve pipe 45 is communicated with a gas storage tank 47 through a connecting pipe 46, the connecting pipe 46 is connected with a locking mechanism, the locking mechanism is in contact with the mounting ring 43, the gas storage tank 47 is filled with compressed air, the gas storage tank 47 is mounted on the inner wall of the auxiliary longitudinal beam 40, a plurality of air inlet holes 48 are formed in the circumferential direction of the side wall of the mounting tube 42, the air inlet holes 48 are in communication with the connecting pipe 46, the other end of the air inlet hole 48 is connected with a gas guide cavity 49 in the mounting tube 42, the opening end of an air bag 50 is connected in the gas guide cavity 49, the air bag 50 is wound on the mounting tube 42, the air bag 50 is in sliding fit with the slot of the side wall of the receiving tube 41, the other end of the air bag 50 is bonded to the side wall of the receiving tube 41 away from the longitudinal beam 2.

[0069] The principle and beneficial effects of the above scheme are:

[0070] When the device is hit, the locking mechanism is unlocked to the mounting ring 43 due to the fracture of the stress guide groove 30, and the mounting tube 42 is twisted under the torsion of the torsion spring 44, and since a plurality of air inlet holes 48 are provided on the mounting tube 42 and are in communication with the gas guide cavity 49, and the mounting tube 42 is rotatably sealed with the sleeve pipe 45, therefore the connecting pipe 46 connected to the bottom of the sleeve pipe 45 can supply the compressed air stored in the gas storage tank 47 to the gas guide cavity 49 through the air inlet hole 48, and finally into the air bag 50, the mounting tube 42 in rotation drives the air bag 50 to rotate, and moves the other end of the air bag 50 away from the side wall of the longitudinal beam 2, at the same time of filling the air bag 50 with compressed air, the air bag 50 starts to expand, and the bonding with the receiving tube 41 is ended, and finally completes the expansion and contacts with the passing pedestrian, and protects the pedestrian from being hit by the device.

[0071] Example thirteen: refer to Figures 1-15The locking mechanism comprises a locking tube 51 connected to the connecting tube 46, a locking column 52 slidingly connected in the locking tube 51, a gas guiding through hole 53 penetrating through the locking column 52, the axis of the gas guiding through hole 53 intersecting with the axis of the connecting tube 46 and being arranged away from the auxiliary longitudinal beam 40, one end of a pressure tube 54 connected to the end of the locking tube 51, two pressure tubes 54 connected through an auxiliary pressure tube, the other end of the pressure tube 54 arranged in a compressed air storage cavity composed of the reinforcing plate 17, the reinforcing plate 18 and the longitudinal beam 2, the compressed air storage cavity filled with compressed air, the end of the locking column 52 connected to a mounting ring 56 through a tension spring 55, the mounting ring 56 connected to the inner wall of the locking tube 51, the other end of the locking column 52 arranged outside the locking tube 51 connected to a pull rod 57, a limiting rod 59 connected to the bottom of the mounting ring 43, and a stop block 58 on the pull rod 57 in contact with the bottom of the limiting rod 59.

[0072] The principle and beneficial effects of the above scheme are:

[0073] When the device is not impacted, the compressed air stored in the compressed air storage cavity can lock the locking device, so that the air bag 50 is not triggered when the device is not impacted. When the device is impacted, the fracture of the stress guide groove 30 reduces the air pressure in the compressed air storage cavity, the pressure of the pressure pipe 54 applied to the locking column 52 is reduced, the tension spring 55 is contracted, the locking column 52 slides in the locking pipe 51 to the direction of the longitudinal beam 2, and then the air guide through hole 53 is communicated with the connecting pipe 46, the inflation of the air bag 50 is realized, at the same time when the air guide through hole 53 is communicated with the connecting pipe 46, the pull rod 57 drives the stop block 58 to slide to the direction of the longitudinal beam 2, so that the stop block 58 ends the limitation of the limiting rod 59 installed at the bottom of the mounting ring 43, under the elastic force of the reset of the torsional spring 44, the mounting pipe 42 rotates, and then the release of the air bag 50 is realized. When the device is not used, the compressed air stored in the compressed air storage cavity can lock the mounting pipe 42, so that the fracture of the stress guide groove 30 does not occur or tear, or the vibration of the device during movement and installation does not cause the release of the air bag 50, which has strong stability. Since the two pressure pipes 54 are connected through the auxiliary pressure pipe, as long as one stress guide groove 30 is fractured, the pressure reduction in one compressed air storage cavity can make the two locking columns 52 quickly act under the guidance of the tension spring 55, at the same time, the two mounting rings 43 are unlocked, the air bag 50 is quickly released under the elastic force of the reset of the torsional spring 44, and enough compressed air is filled in the air bag 50 to make it expand enough to protect the passing pedestrians, so that the phenomenon that the device cannot start or cannot effectively protect the pedestrians after the emergency occurs does not occur. At this time, the compressed air stored in the compressed air storage cavity can also be filled between the limiting pipe 39 and the connecting pipe 31 and the connecting pipe two 32. When a large gap is generated between the limiting pipe 39 and the connecting pipe 31 and the connecting pipe two 32 and is communicated with the outside, the flowing compressed air can limit the movement speed of the fractured longitudinal beam 2 between the limiting pipe 39 and the connecting pipe 31 and the connecting pipe two 32 by using the friction generated by the flow of compressed air. When the gap between the limiting pipe 39 and the connecting pipe 31 and the connecting pipe two 32 is small, the air pressure of the expansion of the compressed air presses the middle part of the limiting pipe 39, and the inner diameter of both ends is reduced, so as to prevent the fracture of the longitudinal beam 2. The opening of the locking mechanism is controlled by air pressure, which greatly improves the practicability and reaction speed of the device.

[0074] Although the embodiments of the present application have been disclosed as above, they are not limited to the application listed in the specification and the embodiments, and can be fully applied to various fields suitable for the present application. Those skilled in the art can easily make other modifications, and therefore the present application is not limited to the specific details and the figures shown and described herein without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A steel structure bridge sidewalk guardrail with a transformable aerodynamic shape, characterized in that: include: A crossbeam (1), wherein both ends of the crossbeam (1) are connected to a longitudinal beam (2), a crossbeam 2 is connected between the two longitudinal beams (2), the crossbeam 2 is arranged below the crossbeam (1), the top of the crossbeam 2 is rotatably connected to the bottom of a plurality of rotating shafts 2 (5), the top of each rotating shaft 2 (5) is connected to the bottom of the rotating shaft (4) through a blade guardrail (3), and the side wall of the rotating shaft (4) is rotatably connected to the mounting hole at the bottom of the crossbeam (1); The rotating shaft (4) is connected to a gear (6), the gear (6) is meshed with a rack (7), the rack (7) is slidably connected in the crossbeam (1), the two ends of the rack (7) are respectively connected to the end of a spring (8), and the other end of the spring (8) is connected to the pressure regulating mechanism; The pressure regulating mechanism comprises: a storage tank (9), the storage tank (9) is connected to the crossbeam (1), the storage tank (9) is filled with hydraulic oil, a plurality of circular holes are opened at the bottom of the storage tank (9), a rotating shaft (4) is rotatably sealed in each circular hole, the rotating shaft (4) is placed in the storage tank (9) and has a through hole at the top, the through hole is communicated with the storage cavity inside the blade guardrail (3), the two ends of the storage tank (9) are respectively connected to the end of a pipe (10), and the other end of the pipe (10) is connected to the pressure shell (11); The pressure regulating mechanism further comprises: a piston (13), wherein the pressure shell (11) is slidably sealed with the piston (13), a pressure chamber is formed between the bottom of the piston (13) and the inner wall of the pressure shell (11), the other end of the pipe (10) is connected to the pressure chamber, the top of the piston (13) is connected to the inner wall of the pressure shell (11) through the second spring (12), the bottom of the piston (13) is connected to the top of the push rod (14), the push rod (14) is slidably sealed with the guide hole at the bottom of the pressure shell (11), the bottom of the push rod (14) is placed below the pressure shell (11) and is connected to the top of the extrusion block (15), the bottom end of the extrusion block (15) is provided with a chamfer, the chamfer is arranged toward the storage tank (9), the chamfer is slidably matched with the second chamfer, the second chamfer is arranged on the top of the second extrusion block (16), the extrusion block (15) and the second extrusion block (16) are both slidably connected to the inner wall of the longitudinal beam (2), and the second extrusion block (16) is connected to the other end of the spring (8).

2. The steel structure bridge sidewalk guardrail with a transformable aerodynamic shape according to claim 1 is characterized in that: The cross section of the blade guardrail (3) is specifically a rhombus, and the intersection of two sides of the rhombus is provided with a rounded corner.

3. The steel structure bridge sidewalk guardrail with a transformable aerodynamic shape according to claim 2 is characterized in that: A second rounded corner is provided between the top of the blade guardrail (3) and the rotating shaft (4), and a third rounded corner is provided between the bottom of the blade guardrail (3) and the second rotating shaft (5).

4. The steel structure bridge sidewalk guardrail with a transformable aerodynamic shape according to claim 1 is characterized in that: A reinforcing plate (17) and a second reinforcing plate (18) are provided in each longitudinal beam (2), and the second reinforcing plate (18) is provided below the reinforcing plate (17).

5. The steel structure bridge sidewalk guardrail with a transformable aerodynamic shape according to claim 4 is characterized in that: The longitudinal beam (2) is rotatably connected to a rotating shaft three (19), and the end of the rotating shaft three (19) placed in the longitudinal beam (2) is connected to a bevel gear (20), the bevel gear (20) is meshed with the bevel gear two (21), the bevel gear two (21) is connected to the top of the sleeve (22), the sleeve (22) is rotatably sealed with the reinforcing plate (17) and the reinforcing plate two (18), and the sleeve (22) is placed below the reinforcing plate two (18) and is slidably connected to a spline shaft (23), the bottom of the spline shaft (23) is connected to the top of a screw rod (24), the screw rod (24) is threadedly connected to the longitudinal beam (2), the bottom of the screw rod (24) is connected to the top of a drill rod (25), and the bottom of the drill rod (25) is arranged in an opening at the bottom of the longitudinal beam (2).

6. The steel structure bridge sidewalk guardrail with a transformable aerodynamic shape according to claim 5 is characterized in that: The drill rod (25) is provided with a tapered column (26), and each side wall of the longitudinal beam (2) is provided with a guide hole 2, the guide hole 2 is slidably connected to the insertion rod (27), and the end of the insertion rod (27) placed in the longitudinal beam (2) is connected to the extrusion block 3 (28), and the chamfer 3 at the top of the extrusion block 3 (28) is arranged toward the tapered inclined surface at the bottom of the tapered column (26), and the extrusion block 3 (28) is connected to the longitudinal beam (2) through the spring 3 (29).

7. The steel structure bridge sidewalk guardrail with a transformable aerodynamic shape according to claim 6 is characterized in that: A stress guiding groove (30) is provided in a circumferential direction on the longitudinal beam (2), and the stress guiding groove (30) is arranged between the reinforcing plate (17) and the second reinforcing plate (18).

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