CN113250079A

CN113250079A - Anti-collision guardrail for highway bridge

Info

Publication number: CN113250079A
Application number: CN202110580968.6A
Authority: CN
Inventors: 侯亚辉; 张军伟; 刘增龙; 马雨; 王玮; 井维龙; 李旭良; 张雷
Original assignee: Shandong Highway & Bridge Construction Co ltd
Current assignee: Shandong Highway & Bridge Construction Co ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2021-08-13

Abstract

The utility model relates to an anticollision barrier for highway bridge belongs to the field of rail guard, including the rail that bends down, set up the rail that bends up and many be parallel to each other and set up the bumping post between rail that bends up and the rail that bends down of rail top down, the bumping post respectively with rail that bends down and rail fixed connection that bends up down, the rail that bends down is fixed to be set up in base face department, be provided with lift stop device between two adjacent bumping posts, lift stop device includes fixed column and lift post, the fixed column is buried underground in the ground, the lift post slides along fixed column length direction and sets up in the fixed column, and the lift post can extend to the top position department of rail that bends up, lift stop device is still including being used for controlling the gliding control mechanism of lift post. When the vehicle strikes the buffering post, the lifting column moves up to the top of the buffering post, and then the protection height of the anti-collision guardrail is improved, so that the vehicle is difficult to roll over under the effect of the lifting column, and the vehicle and a driver are protected.

Description

Anti-collision guardrail for highway bridge

Technical Field

The application relates to the field of rail guards, in particular to an anti-collision guardrail for a highway bridge.

Background

A novel road and bridge protective guard for a protective guard in the process of preventing collision of the protective guard is generally arranged between lanes of a road or a bridge, is used for separating two adjacent lanes and is also used for reducing the damage to vehicles and drivers when the vehicles collide the protective guard by mistake.

In the related art, for example, chinese patent publication No. CN208949718U, published as 2019, 06, 07, proposes a novel guard rail for a highway bridge, which includes a pair of connecting posts arranged in parallel, and a plurality of buffer posts arranged between the pair of connecting posts for supporting a vehicle, wherein the buffer posts have a certain buffering effect to protect the vehicle and a driver who collide with each other.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: when a vehicle collides with the guard rail, especially at a curve, the vehicle is likely to turn over toward the other side of the guard rail when the vehicle collides with the guard rail due to centrifugal force applied to the vehicle during turning, which may cause great damage to the vehicle and people in the vehicle.

Disclosure of Invention

In order to reduce the side effect of turning on that the vehicle that traveles takes place when striking crash barrier, this application provides a crash barrier for highway bridge.

The application provides a pair of public road bridge anticollision barrier for roof beam relates to following technical scheme:

the utility model provides a highway is anticollision guardrail for bridge, includes curved rail down, sets up curved rail and many parallel to each other and set up the bumping post between curved rail and the curved rail down in curved rail top down, the bumping post respectively with curved rail and curved rail fixed connection down, curved rail is fixed to be set up in base face department down, be provided with lift stop device between two adjacent bumping posts, lift stop device includes fixed column and lift post, the fixed column is buried underground in the ground, the lift post slides along fixed column length direction and sets up in the fixed column, and the top position department of lift post extensible to curved rail, lift stop device still including being used for controlling the gliding control mechanism of lift post.

Through adopting above-mentioned technical scheme, go up curved rail and curved rail down can play the supporting role to the bumping post to make the bumping post comparatively stable fix in base plane department. The initial state, the shrink of control mechanism control lift post, when the vehicle was in bend department striking cushion column, control mechanism control lift post moved up to the top of cushion column, and then improved anticollision barrier's protection height for the vehicle is difficult to take place to turn on one's side under the effect of lift post, and then plays the guard action to the vehicle of the lane department of anticollision barrier opposite side on the one hand, also can play the guard action to the vehicle and the driver of occurence of failure.

Optionally, the buffer column comprises a central column body and a cylindrical buffer part coaxially sleeved outside the central column body, the central column body is fixedly connected with the upper bending rail and the lower bending rail, and the buffer part is axially and rotatably connected with the central column body.

Through adopting above-mentioned technical scheme, center cylinder respectively with last curved rail and curved rail fixed connection down, can be so that the bumping post is fixed comparatively firm. Buffering portion axial rotating sleeve establishes outside the center cylinder, and when the vehicle strikeed anticollision barrier, the vehicle easily acted on buffering portion earlier, because axial rotation can take place for buffering portion, the vehicle will easily laminate buffering portion and move to play a good cushioning effect in order to reduce the vehicle and the inside personnel's of vehicle damage to the vehicle, make the vehicle difficult emergence when striking anticollision barrier turn on one's side simultaneously.

Optionally, the buffer part includes a rotating connection pipe sleeve coaxially sleeved outside the central cylinder in a rotating manner, a rubber buffer sleeve coaxially sleeved outside the rotating connection pipe sleeve in a fixing manner, and an intermediate buffer layer arranged between the rotating connection pipe sleeve and the rubber buffer sleeve.

Through adopting above-mentioned technical scheme, when the vehicle is striking the rubber cushion collar, because rubber cushion collar structure is comparatively soft, and then can play certain cushioning effect to the vehicle, reduce the possibility that the vehicle turned on one's side simultaneously.

Optionally, the intermediate buffer layer includes a plurality of sets of ring sleeve assemblies, each ring sleeve assembly includes a resisting ring and a plurality of resisting springs, the resisting ring is coaxially sleeved outside the rotating connecting pipe sleeve, one end of each resisting spring is fixedly connected with the corresponding resisting ring, and the other end of each resisting spring is fixedly connected with the rotating connecting pipe sleeve.

Through adopting above-mentioned technical scheme, support the setting of tight spring and can play certain tight effect of supporting to the rubber cushion collar, and then improve the buffering effect of buffer portion. Meanwhile, the abutting ring is fixedly sleeved between the abutting springs, so that the linkage effect between the abutting springs can be improved, when the abutting spring on one side is abutted, other abutting springs in the abutting ring can also have corresponding effects, and the vehicle can be buffered.

Optionally, a connection gap is formed between the abutting rings, a connection spring is arranged between the connection gaps, one end of the connection spring is fixedly connected with the abutting ring located above, and the other end of the connection spring is fixedly connected with the abutting ring located below.

Through adopting above-mentioned technical scheme, the linkage effect between the multiunit ring cover subassembly can be improved in the setting of connecting spring.

Optionally, the control mechanism includes a control airbag and an air pressure source connected to the control airbag, the fixed column is provided with a sliding groove along a length direction thereof, the lifting column is slidably disposed in the sliding groove, the control airbag is disposed between a lower end of the lifting column and a bottom wall of the sliding groove, an upper port of the sliding groove is connected to a tightening strip for tightening an upper end surface of the lifting column, and the control mechanism further includes a pulling assembly for controlling the tightening strip to be separated from the lifting column.

Through adopting above-mentioned technical scheme, the setting of sliding tray can play the guard action to the control gasbag, and when the bumping post received the striking, the pulling subassembly pulling was supported tight long piece to make to support tight long piece and break away from the lift post, and then make the control gasbag can promote the lift post and rise, and then make the lift post can play certain effect of blockking to the vehicle, so that the difficult emergence of vehicle is turned on one's side.

Optionally, the pulling assembly comprises a bending rod which is the same as the bending degree of the upper bending rail, a guide rod is fixedly connected to the center column body, the guide rods are parallel to each other and perpendicular to the center column body, the bending rod is connected with the guide rod in a sliding mode along the length direction of the guide rod, a pushing bulge used for pushing the bending rod to move towards the direction away from the center column body is fixedly connected to the upper end of the connecting pipe sleeve in a rotating mode, and the long piece and the bending rod are fixedly connected in a supporting mode.

Through adopting above-mentioned technical scheme, the setting up of guide bar can play the guide effect to crooked pole, receives the striking when taking place to rotate when the buffering post, and the arch promotion on the center cylinder pushes away crooked pole and moves along the direction of guide bar towards keeping away from the fixed column, and then makes to support the long piece and break away from the lift post to make the lift post can shift up smoothly.

Optionally, a friction sleeve for increasing the friction force applied to the rotary connecting pipe sleeve is arranged between the rotary connecting pipe sleeve and the central cylinder, and the friction sleeve is fixedly sleeved outside the central cylinder.

Through adopting above-mentioned technical scheme, the setting up of friction sleeve can be used to the increase and rotates the frictional force that the connecting tube cover received, and then makes the bumping post be difficult for taking place the mistake because of reasons such as blowing, and then makes.

Optionally, a blocking and ejecting piece is connected between the two adjacent lifting columns, the blocking and ejecting piece is a protective net, and the protective net is fixedly connected with the two adjacent lifting columns.

Through adopting above-mentioned technical scheme, because the vehicle produces some flyings easily when striking anticollision barrier, these flyings and the lane of the opposite side of easily flying to the anticollision barrier are easy to the personnel or the vehicle injury of traveling near. Due to the arrangement of the protective net, when the lifting column moves upwards, the protective net is opened, so that a certain blocking effect can be achieved on flying objects generated during collision, and further a certain protection effect can be achieved on vehicles or people running nearby.

In summary, the present application includes at least one of the following advantageous technical effects:

1. the lifting resisting device is arranged: the upper bending rail and the lower bending rail can support the buffer column, so that the buffer column is stably fixed on the base surface. In the initial state, the control mechanism controls the lifting column to contract, when a vehicle impacts the buffer column at a curve, the control mechanism controls the lifting column to move upwards above the buffer column, so that the protection height of the anti-collision guardrail is improved, the vehicle is difficult to roll over under the action of the lifting column, and therefore, the vehicle on the other side of the anti-collision guardrail is protected, and the vehicle and a driver in an accident can also be protected;

2. the arrangement of the blocking and ejecting piece is as follows: because the vehicle produces some missiles easily when striking the crash barrier, these missiles and the lane that easily flies to the opposite side of crash barrier are easy to the personnel or the vehicle injury of traveling near. Due to the arrangement of the protective net, when the lifting column moves upwards, the protective net is opened, so that a certain blocking effect can be achieved on flying objects generated during collision, and further a certain protection effect can be achieved on vehicles or people running nearby.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a schematic view of a half-section structure of a rubber buffer sleeve in an embodiment of the present application;

FIG. 3 is a schematic view of the construction of a collar assembly according to an embodiment of the present application;

FIG. 4 is a partial cross-sectional view of a fixation post in an embodiment of the present application;

fig. 5 is a schematic view of the connection between the control air bag and the movable tooth block in the embodiment of the application.

Description of reference numerals: 100. a rail assembly; 110. bending the rail upwards; 120. downward bending the rail; 130. bending a groove; 200. a buffer column; 210. a central column; 220. a connecting pipe sleeve is rotated; 230. a loop assembly; 231. a tightening ring; 232. the spring is tightly propped; 233. a connecting spring; 240. a rubber cushion sleeve; 300. a lifting resisting device; 310. fixing a column; 311. a sliding groove; 320. a lifting column; 331. controlling the air bag; 333. tightly abutting the long sheet; 340. a pulling assembly; 341. a curved rod; 342. a guide bar; 343. pushing the protrusion; 400. a backstop mechanism; 410. a non-return rack; 420. a movable tooth block; 430. a limiting long groove; 431. a chute; 432. a cavity; 440. a limiting block; 450. a limiting groove; 460. a limit rail; 600. a friction sleeve; 700. and (4) a protective net.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses public road bridge is with anticollision barrier. Referring to fig. 1, the anti-collision guardrail for a highway bridge comprises a curved rail assembly 100, a plurality of buffer posts 200 and a lifting resisting device 300. The bumper beam 200 serves to cushion a vehicle hitting thereon, and the curved rail assembly 100 serves to fix the bumper beam 200 so as to fixedly support the bumper beam 200. The lifting and stopping device 300 is connected to the curved rail assembly 100 to increase the height of the crash barrier when the vehicle collides with the crash barrier, so that the colliding vehicle is unlikely to roll over and jump to the other side of the crash barrier.

Referring to fig. 1, the curved rail assembly 100 includes a lower curved rail 120 and an upper curved rail 110 disposed above the lower curved rail 120, curved grooves 130 are formed in the upper curved rail 110 and the lower curved rail 120 along the length direction thereof, buffer pillars 200 are disposed between the upper curved rail 110 and the lower curved rail 120 in parallel, the upper ends of the buffer pillars 200 are inserted into the curved grooves 130 of the upper curved rail 110 and welded to the sidewalls of the curved grooves 130, the lower ends of the buffer pillars 200 are inserted into the curved grooves 130 of the lower curved rail 120 and fixedly connected to the lower curved rail 120, and the lower ends of the buffer pillars 200 extend to the ground, so that the buffer pillars 200 are firmly connected to the ground.

Referring to fig. 1 and 2, the strut 200 includes a central column 210 and a cushioning portion. The center pillar 210 serves to connect the upper curved rail 110, the lower curved rail 120, and the foundation. The buffer part includes a rotating connection pipe sleeve 220 coaxially rotatably sleeved outside the center cylinder 210, a rubber buffer sleeve 240 coaxially fixedly sleeved outside the rotating connection pipe sleeve 220, and an intermediate buffer layer disposed between the rotating connection pipe sleeve 220 and the rubber buffer sleeve 240. The rotary connecting pipe sleeve 220 is rotatably connected with the central cylinder 210 through a bearing, the bearing is coaxially sleeved on the outer wall of the central cylinder 210, the inner ring of the bearing is fixedly connected with the central cylinder 210, and the outer ring of the bearing is fixedly connected with the inner wall of the rotary connecting pipe sleeve 220. Since the rubber buffer cover 240 is made of a soft material, it can play a good role in buffering when a vehicle collides with it.

Referring to fig. 2 and 3, the intermediate buffer layer includes a plurality of ring assemblies 230 arranged axially symmetrically along the rotary connection pipe sleeve 220. The ring sleeve assembly 230 comprises a resisting ring 231 and a plurality of resisting springs 232, the resisting ring 231 is coaxially sleeved outside the rotating connecting pipe sleeve 220, the resisting springs 232 are arranged along the circumferential direction of the rotating connecting pipe sleeve 220 and perpendicular to the rotating connecting pipe sleeve 220, one ends of the resisting springs 232 are welded with the inner wall of the resisting ring 231, the other ends of the resisting springs 232 are welded with the outer wall of the rotating connecting pipe sleeve 220, and the outer wall of the resisting ring 231 is fixedly connected with the inner wall of the rubber buffer sleeve 240.

When the rubber buffer sleeve 240 is impacted, the abutting springs 232 can act to abut against the rubber buffer sleeve 240, so that a certain buffer effect is achieved on the vehicle, and meanwhile, as the abutting rings 231 are connected with the abutting springs 232, the linkage buffer effect among the abutting springs 232 can be improved. Meanwhile, in order to improve the linkage effect between the ring sleeve assemblies 230 to further improve the buffering effect on the impact vehicle, a connection gap is provided between the adjacent tightening rings 231, and a plurality of connection springs 233 are provided at the connection gap, the connection springs 233 are arranged along the circumferential direction of the rotating connection pipe sleeve 220, and the central axis of the connection springs 233 is parallel to the central axis of the rotating connection pipe sleeve 220. One end of the connecting spring 233 is welded to the abutting ring 231 located above, and the other end of the connecting spring 233 is welded to the abutting ring 231 located below.

Referring to fig. 1, the lifting and resisting device 300 includes a fixing post 310 and a lifting post 320 disposed between each pair of adjacent two buffer posts 200. The central axes of the fixed column 310 and the lifting column 320 are both arranged parallel to the central axis of the buffer column 200, the fixed column 310 is located below the upper bent rail 110, the fixed column 310 passes through the bent groove 130 of the lower bent rail 120 and extends into the foundation, and the side wall of the fixed column 310 is welded with the lower bent rail 120. The fixed post 310 is provided with a sliding slot 311 along the length direction thereof from the upper end, the lifting post 320 penetrates through the sliding slot 311 along the length direction of the fixed post 310 and is slidably connected with the fixed post 310, and the lifting stop device 300 further comprises a control mechanism for controlling the sliding position of the lifting post 320.

Referring to fig. 1, 2 and 4, the control mechanism includes a control airbag 331 disposed inside each sliding slot 311 and an air pressure source connected to the control airbag 331 through a pipeline, the air pressure source is an air pressure pump, and a pressure stabilizing valve is disposed in the pipeline connecting the air pressure pump and the control airbag 331 so as to keep the air pressure inside the control airbag 331 stable. The control airbag 331 is located between the lower end wall of the lifting column 320 and the bottom wall of the sliding groove 311, and the control airbag 331 is respectively bonded and fixed to the lower end wall of the lifting column 320 and the bottom wall of the sliding groove 311. The side wall of the upper port of the sliding slot 311 is provided with an inserting slot, the inserting slot is internally inserted with a tightly supporting long sheet 333 for tightly supporting the upper end surface of the lifting column 320, and the sliding directions of the tightly supporting long sheets 333 are parallel to each other.

The control mechanism further includes a pulling assembly 340 for controlling the gripping tab 333 to disengage from the lifting column 320. The pulling assembly 340 comprises a guide rod 342 and a bending rod 341 with the same curvature as that of the upper bending rail 110, each central cylinder 210 is fixedly connected with one guide rod 342, the guide rods 342 are parallel to the sliding direction of the abutting long piece 333, the guide rods 342 are perpendicular to the central cylinders 210, a plurality of guide grooves are formed in the bending rods 341, the guide rods 342 penetrate through the guide grooves and are in sliding connection with the guide rods 342, a plurality of pushing protrusions 343 used for pushing the bending rods 341 to move towards the direction deviating from the central cylinders 210 are fixedly connected to the upper end of the rotary connecting pipe sleeve 220, the pushing protrusions 343 are arranged along the circumferential direction of the rotary connecting pipe sleeve 220, and the abutting long piece 333 is fixedly connected with the bending rods 341. When the rotary connection sleeve 220 rotates, the pushing protrusion 343 acts on the curved rod 341, and the curved rod 341 slides along the length direction of the guide rod 342, so that the fastening long piece 333 is disengaged from the lifting column 320.

Referring to fig. 4 and 5, in order to make it difficult for the lift column 320 to slide into the sliding groove 311 when the vehicle is operated, a backstop mechanism 400 is provided in the sliding groove 311. Backstop mechanism 400 includes a plurality of backstop racks 410 and movable blocks 420 for engaging with the backstop teeth. The inner wall of the sliding groove 311 is provided with a plurality of limiting long grooves 430 along the length direction, the limiting long grooves 430 are symmetrically arranged along the circumferential direction of the lifting column 320, each limiting long groove 430 is welded with one non-return rack 410, the side walls of the lifting column 320 are welded with limiting blocks 440 with the same number as the limiting long grooves 430, and each limiting long groove 430 is internally provided with one limiting block 440 which slides along the length direction. The limiting block 440 is provided with a sliding groove 431 along the radial direction of the lifting column 320, the sliding groove 431 extends into the lifting column 320, the movable tooth blocks 420 are arranged in the sliding groove 431 in a sliding manner, the lifting column 320 is provided with a cavity 432 communicated with the sliding groove 431, and the control air bag 331 is fixedly bonded with each movable tooth block 420 through the cavity 432. When the control airbag 331 is filled with gas, the control airbag 331 drives the lifting column 320 to move upwards, and simultaneously the control airbag 331 drives the movable gear block 420 to contact the non-return gear rack 410, so that the lifting column 320 is difficult to move downwards. When the gas in the control airbag 331 is pumped out, the control airbag 331 contracts to drive the movable gear block 420 to separate from the non-return rack 410, so that the lifting column 320 can be contracted into the sliding groove 311.

In order to enable the movable tooth block 420 to run more stably, a limiting groove 450 is formed in the side wall of the sliding groove 431 along the radial direction of the lifting column 320, a limiting rail 440 is welded to the side wall of the movable tooth block 420, and the limiting rail 440 is arranged in the limiting groove 450 in a sliding mode.

In order to make the rotation connecting pipe sleeve 220 not prone to error rotation, the central cylinder 210 is coaxially and fixedly sleeved with the friction sleeve 600, the inner wall of the friction sleeve 600 is fixedly connected with the central cylinder 210, the outer wall of the friction sleeve 600 is attached to the inner wall of the rotation connecting pipe sleeve 220 to increase the friction force applied to the rotation connecting pipe sleeve 220, and therefore the rotation connecting pipe sleeve 220 is not prone to error rotation.

Referring to fig. 1, in order to reduce the flying objects generated by the vehicle during collision from flying to the road on the other side, a shielding member is connected between two adjacent lifting columns 320, the shielding member is a protective net 700, the protective net 700 is in a rectangular mesh shape, one corner of the protective net 700 is fixedly connected to the upper end of one lifting column 320, the other corner of the protective net 700 is fixedly connected to the upper end of the other lifting column 320, and one side of the protective net 700 is fixedly connected to the side wall of the upper curved rail 110. When the lifting column 320 moves upward, the protection net 700 is opened to block the flying objects. When the lifting column 320 moves down, the protection net 700 is folded, so that the driver can observe the road condition conveniently.

The implementation principle of the embodiment of the application is as follows: when a vehicle impacts one of the buffer posts 200, the rotary connecting pipe sleeve 220 rotates to drive the push protrusion 343 to push the curved rod 341, so that the curved rod 341 is pulled out against the long piece 333, the control air bag 331 drives the lifting post 320 to move upwards, the movable tooth block 420 is contacted with the non-return rack 410 in the process that the lifting post 320 moves upwards, and the lifting post 320 is difficult to move downwards so as to reduce the possibility of side turning of the vehicle, and meanwhile, the protective net 700 is opened in the process that the lifting post 320 moves upwards so as to play a certain role in blocking flying objects generated in the impact process.

When the air in the control air bag 331 is pumped out, the control air bag 331 controls the movable gear block 420 to be separated from the non-return rack 410, thereby facilitating the downward movement of the lifting rod 320.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a public road bridge collision avoidance guardrail for roof beam which characterized in that: comprises a lower bent rail (120), an upper bent rail (110) arranged above the lower bent rail (120) and a plurality of buffer columns (200) which are parallel to each other and arranged between the upper bent rail (110) and the lower bent rail (120), the buffer column (200) is respectively fixedly connected with the lower bent rail (120) and the upper bent rail (110), the lower bent rail (120) is fixedly arranged on the base surface, a lifting resisting device (300) is arranged between two adjacent buffer columns (200), the lifting resisting device (300) comprises a fixed column (310) and a lifting column (320), the fixing column (310) is embedded in the foundation, the lifting column (320) is arranged in the fixing column (310) in a sliding mode along the length direction of the fixing column (310), and the lifting column (320) can extend to the position above the upper bent rail (110), and the lifting resisting device (300) also comprises a control mechanism for controlling the sliding of the lifting column (320).

2. The anti-collision guardrail for the road and bridge as claimed in claim 1, wherein: buffer column (200) include central cylinder (210) and coaxial cover establish the outside cylindrical buffer portion in central cylinder (210), central cylinder (210) and last curved rail (110) and the equal fixed connection of curved rail (120) down, buffer portion and central cylinder (210) axial rotation are connected.

3. The anti-collision guardrail for the road and bridge as claimed in claim 2, wherein: the buffer part comprises a rotary connecting pipe sleeve (220) coaxially sleeved outside the central cylinder (210) in a rotary mode, a rubber buffer sleeve (240) coaxially and fixedly sleeved outside the rotary connecting pipe sleeve (220), and a middle buffer layer arranged between the rotary connecting pipe sleeve (220) and the rubber buffer sleeve (240).

4. The anti-collision guardrail for the road and bridge as claimed in claim 3, wherein: the middle buffer layer comprises a plurality of groups of ring sleeve assemblies (230) which are symmetrically arranged, each ring sleeve assembly (230) comprises a resisting ring (231) and a plurality of resisting springs (232), the resisting rings (231) are coaxially sleeved outside the rotary connecting pipe sleeve (220), one ends of the resisting springs (232) are fixedly connected with the resisting rings (231), and the other ends of the resisting springs (232) are fixedly connected with the rotary connecting pipe sleeve (220).

5. The anti-collision guardrail for the road and bridge as claimed in claim 4, wherein: the connecting device is characterized in that a connecting gap is formed between the adjacent abutting rings (231), a connecting spring (233) is arranged between the connecting gaps, one end of the connecting spring (233) is fixedly connected with the abutting ring (231) located above, and the other end of the connecting spring (233) is fixedly connected with the abutting ring (231) located below.

6. The anti-collision guardrail for the road and bridge as claimed in claim 3, wherein: the control mechanism comprises a control air bag (331) and an air pressure source connected with the control air bag (331), a sliding groove (311) is formed in the fixed column (310) along the length direction of the fixed column, the lifting column (320) is arranged in the sliding groove (311) in a sliding mode, the control air bag (331) is arranged between the lower end of the lifting column (320) and the bottom wall of the sliding groove (311), a pressing long piece (333) used for pressing the upper end face of the lifting column (320) tightly is connected to the upper end opening of the sliding groove (311), and the control mechanism further comprises a pulling assembly (340) used for controlling the pressing long piece (333) to be separated from the lifting column (320).

7. The anti-collision guardrail for the road and bridge as claimed in claim 6, wherein: pulling subassembly (340) include with curved pole (341) that the curved degree of last curved rail (110) is the same, equal fixedly connected with guide bar (342) of center cylinder (210), guide bar (342) are parallel to each other and perpendicular to center cylinder (210) sets up, curved pole (341) are along guide bar (342) length direction and guide bar (342) sliding connection, and rotate and connect pipe box (220) upper end fixedly connected with and be used for promoting curved pole (341) towards deviating from protruding (343) of promotion of center cylinder (210) direction removal, support tight long piece (333) and curved pole (341) fixed connection.

8. The anti-collision guardrail for the road and bridge as claimed in claim 7, wherein: a friction sleeve (600) used for increasing the friction force borne by the rotary connecting pipe sleeve (220) is arranged between the rotary connecting pipe sleeve (220) and the central cylinder (210), and the friction sleeve (600) is fixedly sleeved outside the central cylinder (210).

9. The anti-collision guardrail for the road and bridge as claimed in claim 6, wherein: a blocking and ejecting piece is connected between the two adjacent lifting columns (320), the blocking and ejecting piece is a protective net (700), and the protective net (700) is fixedly connected with the two adjacent lifting columns (320).