Bridge guardrail

Abstract

The application is a bridge guardrail, which effectively solves the problem of overturning, swinging or rushing out of the road of the vehicle, causing safety hazards to passengers in the vehicle and other vehicles on the road; the technical solution is to include a plurality of anti-collision units placed on both sides of the road, each anti-collision unit includes two round rods, each round rod is sleeved with a vertical rod at the upper end, the vertical rod moves up and down along the round rod and does not separate from the round rod, the vertical rod can rotate on the round rod, a through slot is opened on both sides of the road, the round rod is inserted into the through slot, the round rod can move in and out along the transverse direction of the road in the through slot, and the round rod is blocked when moving outward in the through slot; the application can make the rectangular frame swing and make the vehicle continue to move straight forward no matter where the vehicle hits the rectangular frame, solve the problem that the vehicle moves forward along the anti-collision barrel and rolls over when the traditional guardrail is hit, and solve the problem of large impact force of the vehicle and rushing out of the road.

Description

Technical Field

[0001] This invention relates to the field of guardrails, and in particular to a bridge guardrail. Background Technology

[0002] On highways with bridges or culverts, the road surface is more prone to icing in winter when temperatures are low, causing vehicles to skid. To ensure vehicle safety, crash barriers are installed on both sides of the road or bridge to cushion the impact force, as shown in the patent with announcement number CN212270789U. However, when a vehicle collides with a crash barrier, because the crash barrier is fixed, especially at high speeds, although the crash barrier can provide some cushioning, the reaction force exerted by the crash barrier on the vehicle is also large, resulting in significant damage to the vehicle and posing a significant safety hazard to the occupants. Since the crash barrier is circular, the vehicle will continue to move along the crash barrier in the direction of its forward movement. As the vehicle continues to move forward, it will frequently collide with the crash barrier, causing the vehicle to sway or overturn, posing a significant safety hazard to other vehicles on the road and putting the occupants in a dangerous situation.

[0003] To address the problems with crash barriers, patent CN113047165B provides a bridge railing. Several railing connecting blocks 31 are sequentially connected along the longitudinal direction of the bridge via elastic ropes 32. The lower end of the protective barrel 1 is connected to a buffer assembly. In the event of an accident, the railing connecting blocks 31 undergo relative displacement along the lateral direction of the bridge, causing them to stretch the elastic ropes 32. The upper and lower ends of the railing connecting blocks 31 are respectively buffered by the elastic ropes 32 and the buffer assembly, reducing the impact force on the protective barrel 1 and its rotation axis 2. Simultaneously, in conjunction with the rotating protective barrel 1, it prevents vehicles from running off the railing and causing larger accidents. However, to achieve the crash-proof effect, the deformation of the elastic ropes 32 and the movement of the buffer assembly are limited. Furthermore, the resistance to deformation of the elastic ropes 32 and the resistance to movement of the buffer assembly are not insignificant. Therefore, the above solution still has the following problems:

[0004] 1. If the impact angle between the vehicle and the guardrail is small, the force exerted by the vehicle on the guardrail is small, and the impact force on the elastic rope 32 and the buffer component is relatively small. The deformation of the elastic rope 32 and the movement of the buffer component are also small. Under these circumstances, the vehicle will continue to move forward along the protective barrel 1. During the movement, the vehicle will frequently collide with the protective barrel 1, causing the vehicle to overturn or swing, posing a safety hazard to the passengers in the vehicle and other vehicles on the road.

[0005] 2. When the impact angle between the vehicle and the guardrail is large, since the deformation of the elastic rope 32 and the movement of the buffer component are limited, the vehicle will still be subjected to a large impact force at the end point of the deformation of the elastic rope 32 and the end point of the movement of the buffer component. In severe cases, the elastic rope 32 may be damaged and the vehicle may be thrown off the road, causing injury to the passengers inside the vehicle. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, the present invention provides a bridge guardrail that effectively solves the problem of safety hazards to passengers in vehicles and other vehicles on the road when vehicles overturn, swing, or run off the road.

[0007] The technical solution is a bridge guardrail, which includes multiple anti-collision units placed on both sides of the road. Each anti-collision unit includes two round rods, and a vertical rod is fitted on the upper end of each round rod. The vertical rod can move up and down along the round rods without detaching from them. The vertical rod can rotate on the round rods. Through slots are opened on both sides of the road, and the round rods are inserted into the through slots. The round rods can move in and out in the transverse direction of the road within the through slots. When the round rods move outward in the through slots, they encounter resistance.

[0008] A rectangular frame is installed between two vertical poles, and multiple anti-collision barrels are installed inside the rectangular frame. There is a pivot at the upper end of each side of the rectangular frame, and a mounting block at the lower left and right sides of the rectangular frame. A pin is inserted into each mounting block, and the pin can move left and right on the mounting block. The pivot and the pin are inserted into the corresponding vertical pole. Both the pivot and the pin are round rods and can rotate and move left and right inside the vertical pole. The pivot does not detach from the vertical pole. When the rectangular frame is not under force, the pin is inserted into the vertical pole. When the rectangular frame is under force and moves to the outside of the road, the pin is pulled out from the vertical pole and detaches from the vertical pole, causing the lower end of the rectangular frame to rotate around the pivot.

[0009] There is a clearance groove in the road below the rectangular frame, and there is a fall protection net in the clearance groove. One end of the fall protection net is fixed in the clearance groove, and the other end of the fall protection net is connected to the lower end of the rectangular frame.

[0010] The lower end of the round rod has a sinkhole located below the road surface. The sinkhole is in the transverse direction of the road and its opening faces outward. The lower end of the channel passes through the sinkhole. A housing is fixed inside the sinkhole. Air inlets are opened on both the front and rear ends of the housing. The air inlet at the front end is larger than that at the rear end. A piston rod is inserted into the housing and placed in the transverse direction of the road. One end of the piston rod is outside the front end of the housing. A piston is fixed to the other end of the piston rod inside the housing. The piston rod drives the piston to move back and forth. A compression spring is fitted on the piston rod. One end of the compression spring contacts the piston, and the other end of the compression spring contacts the front end of the housing. The lower end of the round rod is fixed together with the piston rod located outside the housing.

[0011] Above the settling trough is a rectangular groove placed under the road surface, with the outer end of the rectangular groove penetrating the road. The rectangular groove is in the same direction as the settling trough. The lower end of the through groove penetrates the rectangular groove. Inside the rectangular groove is a rectangular block that moves in the lateral direction of the road. There are multiple ball bearings at the left and right ends of the rectangular block. A round rod is inserted into the rectangular block through the through groove.

[0012] The housing contains a fixed plate located behind the piston. The fixed plate is ventilated and has a crossbar inserted into it. The crossbar moves back and forth on the fixed plate. A semi-circular stop is fixed at the rear end of the crossbar. The rear end face of the housing is conical, and there is a gas compensation hole at the center of the conical rear end face. A compression spring is fitted on the crossbar. One end of the compression spring contacts the stop and the other end contacts the fixed plate. The compression spring causes the stop to engage with the compensation hole, sealing it. The air inlet on the conical rear end face of the housing is smaller than the compensation hole.

[0013] The pin has its left and right ends positioned on either side of the mounting block. A spring is fitted onto the pin inside the mounting block, with one end fixed to the mounting block and the other end fixed to the pin. Two fixing blocks are fixed at the lower center of the rectangular frame, with a gap between them. The two pins are connected by a pull rope, which passes through the fixing blocks. Initially, the pin is inserted into the vertical rod, and the pull rope is taut. Between the two fixing blocks is a slider that can move up and down along the fixing blocks. Each of the adjacent end faces of the two fixing blocks has a groove arranged vertically. A limiting block is set at each end of the slider. The slider is placed in the groove via the limiting blocks, allowing it to move up and down on the fixing blocks. The slider is fixed to the pull rope. Below the slider is a push block fixed to the road surface. The lower end face of the slider and the upper end face of the push block are corresponding inclined surfaces. When the rectangular frame moves outward from the road, causing the slider to contact the inclined surface on the push block, the push block causes the slider to move upward on the fixing block and pulls the pull rope, pulling the pin out of the vertical rod.

[0014] The other end of the fall-prevention net is connected to the bottom of the rectangular frame via an elastic rope.

[0015] The adjacent vertical bars of the two adjacent anti-collision units are connected together by an elastic rope.

[0016] The aforementioned channel does not penetrate the outer end face of the road.

[0017] The vertical rod is a rectangular rod, and a circular countersunk hole is opened on the lower end face of the vertical rod. The diameter of the bottom of the circular countersunk hole is larger than the diameter of the opening of the circular countersunk hole. The rod is placed in the circular countersunk hole, and a cylindrical block is fixed at the upper end of the rod. The diameter of the cylindrical block is larger than the diameter of the opening of the circular countersunk hole.

[0018] The vertical rod has a circular hole on its end face near the rectangular frame. The circular hole is a countersunk hole, and the diameter of the bottom of the circular hole is larger than the diameter of the opening of the circular hole. The rotating shaft is placed inside the circular hole, and a cylindrical block is fixed to one end of the rotating shaft at the bottom of the circular hole. The diameter of the cylindrical block is larger than the diameter of the opening of the circular hole.

[0019] This invention solves the problem of traditional guardrails where vehicles continue to move forward along the crash barrier and overturn when the impact angle is small, by ensuring that the rectangular frame swings regardless of where the vehicle impacts it, allowing the vehicle to continue moving forward in a straight line. After moving a certain distance, the rectangular frame can be pushed out of the vertical bar by a pusher and slider, opening the lower end of the rectangular frame. This allows the lower end of the rectangular frame to rotate via a pivot, pulling out the fall arresting net. This creates a buffer space between the rectangular frame and the fall arresting net, allowing the vehicle to continue moving forward within the buffer space. This increases the vehicle's movement space, reduces the impact force, and prevents the vehicle from running off the road. It also solves the problem of large impact force and vehicle running off the road when the impact angle between the vehicle and the rectangular frame is large. Attached Figure Description

[0020] Figure 1 This is the front view of the present invention.

[0021] Figure 2 This is a top view of the present invention.

[0022] Figure 3 This is a top sectional view of the present invention.

[0023] Figure 4 This is a right-side sectional view of the BB of the present invention.

[0024] Figure 5 This is a CC left sectional view of the present invention.

[0025] Figure 6 This is an enlarged view of point D in the present invention.

[0026] Figure 7 This is a top sectional view of the middle part of the housing of the present invention.

[0027] Figure 8 This is a schematic diagram of the connection of the reserved rectangular frame in this invention.

[0028] Figure 9 This is a front sectional view of the retained vertical rod, round rod, and pivot of the present invention.

[0029] Figure 10 The left-side fixing block and its mating perspective view are shown in the present invention. Detailed Implementation

[0030] Depend on Figures 1 to 10The present invention includes multiple anti-collision units placed on both sides of the road 21. Each anti-collision unit includes two round rods 4. A vertical rod 1 is fitted on the upper end of each round rod 4. The vertical rod 1 can move up and down along the round rod 4 without disengaging from the round rod 4. The vertical rod 1 can rotate on the round rod 4. Through slots are opened on both sides of the road 21. The round rods 4 are inserted into the through slots. The round rods 4 can move in and out in the transverse direction of the road 21 within the through slots. When the round rods 4 move outward from the road 21 within the through slots, they are resisted.

[0031] A rectangular frame 2 is installed between two vertical poles 1. Multiple anti-collision barrels 3 are installed inside the rectangular frame 2. There is a pivot 12 at the upper end of each side of the rectangular frame 2, and a mounting block at the lower left and right sides of the rectangular frame 2. A pin 13 is inserted into each mounting block. The pin 13 can move left and right on the mounting block. The pivot 12 and the pin 13 are inserted into the vertical pole 1 on the corresponding side. Both the pivot 12 and the pin 13 are round rods and can rotate and move left and right inside the vertical pole 1. The pivot 12 does not detach from the vertical pole 1. When the rectangular frame 2 is not under force, the pin 13 is inserted into the vertical pole 1. When the rectangular frame 2 is under force and moves outward from the road 21, the pin 13 is pulled out from the vertical pole 1 and detached from the vertical pole 1, causing the lower end of the rectangular frame 2 to rotate around the pivot 12.

[0032] There is a clearance groove 19 in the road 21 below the rectangular frame 2. There is a fall protection net 10 in the clearance groove 19. One end of the fall protection net is fixed in the clearance groove 19, and the other end of the fall protection net 10 is connected to the lower end of the rectangular frame 2.

[0033] The lower end of the round rod 4 has a sink 18 located below the road surface. The sink 18 is in the transverse direction of the road 21 and its opening faces the outside of the road 21. The lower end of the through groove passes through the sink 18. A housing 6 is fixed inside the sink 18. Air inlets 11 are opened on both the front and rear end faces of the housing 6. The air inlet 11 at the front end is larger than the air inlet 11 at the rear end. A piston rod 8 is inserted into the housing 6 and is placed in the transverse direction of the road 21. One end of the piston rod 8 is placed outside the front end face of the housing 6. There is a piston 7 fixed to the other end of the piston rod 8 inside the housing 6. The piston rod 8 drives the piston 7 to move back and forth. A compression spring is fitted on the piston rod 8. One end of the compression spring contacts the piston 7, and the other end of the compression spring contacts the front end face of the housing 6. The lower end of the round rod 4 is fixed together with the piston rod 8 placed outside the housing 6.

[0034] Above the settling trough 18 is a rectangular groove 20 placed under the road surface. The outer end of the rectangular groove 20 penetrates the road 21. The rectangular groove 20 is in the same direction as the settling trough 18. The lower end of the through groove penetrates the rectangular groove 20. Inside the rectangular groove 20 is a rectangular block 5 that moves in the transverse direction of the road 21. There are multiple ball bearings at the left and right ends of the rectangular block 5. The round rod 4 is inserted into the rectangular block 5 through the through groove. The rectangular block 5 provides a stable mounting base for the round rod 4. When the round rod 4 is subjected to force and moves outwards from the road 21, the round rod 4 drives the rectangular block 5 to move together, ensuring the stability of the round rod 4 when it moves. Moreover, the ball bearings at the left and right ends of the rectangular block 5 greatly reduce the moving resistance of the rectangular block 5, ensuring that as long as the round rod 4 is subjected to force, the round rod 4 can move outwards from the road 21.

[0035] The cavity of the housing 6 contains a fixed plate placed behind the piston 7. The fixed plate is ventilated and a crossbar is inserted into it. The crossbar moves back and forth on the fixed plate. A semi-circular stop block 9 is fixed at the rear end of the crossbar. The rear end face of the housing 6 is conical. There is a gas compensation hole at the center of the conical rear end face. A compression spring is fitted on the crossbar. One end of the compression spring contacts the stop block 9, and the other end of the compression spring contacts the fixed plate. The compression spring causes the stop block 9 to engage with the compensation hole and seal the compensation hole. The air inlet 11 on the conical rear end face of the housing 6 is smaller than the compensation hole.

[0036] The left and right ends of the pin 13 are respectively placed on both sides of the mounting block. A spring is fitted on the pin 13 placed inside the mounting block. One end of the spring is fixed to the mounting block, and the other end of the spring is fixed to the pin 13. Two fixing blocks 17 are fixed at the middle of the lower end of the rectangular frame 2. There is a gap between the fixing blocks 17. The two pins 13 are connected together by a pull rope 14. The pull rope passes through the fixing blocks 17. In the initial state, the pin 13 is inserted into the vertical rod 1, and the pull rope is taut. There is a slider 16 between the two fixing blocks 17 that can move up and down along the fixing blocks 17. Each adjacent end face has a groove arranged vertically. Each end of the slider has a limiting block. The slider 16 is placed in the groove through the limiting block, so that the slider 16 moves up and down on the fixed block 17. The slider 16 is fixed on the pull rope 14. Below the slider 16 is a push block 15 fixed on the road surface. The lower end face of the slider 16 and the upper end face of the push block 15 are corresponding inclined surfaces. When the rectangular frame 2 moves outward from the road 21 and the slider 16 contacts the inclined surface on the push block 15, the push block 15 will cause the slider 16 to move upward on the fixed block 17 and pull the pull rope 14 to pull the pin 13 out of the vertical rod 1.

[0037] The other end of the fall arresting net 10 is connected to the bottom of the rectangular frame 2 via an elastic rope. When the vehicle impacts and pulls the fall arresting net 10 out of the clearance groove 19, the elastic rope can further increase the inertia of the vehicle, reduce the impact of the vehicle on the fall arresting net 10, and also reduce the impact force on the vehicle.

[0038] The adjacent vertical rods 1 of the two adjacent anti-collision units are connected together by an elastic rope.

[0039] The groove does not penetrate the outer end face of the road 21; when the groove of the round rod 4 moves outward, the groove prevents the round rod 4 from separating from the road 21.

[0040] The vertical rod 1 is a rectangular rod, and a circular countersunk hole is opened on the lower end face of the vertical rod 1. The diameter of the bottom of the circular countersunk hole is larger than the diameter of the opening of the circular countersunk hole. The round rod 4 is placed in the circular countersunk hole, and a cylindrical block is fixed at the upper end of the round rod. The diameter of the cylindrical block is larger than the diameter of the opening of the circular countersunk hole.

[0041] The vertical rod 1 has a circular hole on its end face near the rectangular frame 2. The circular hole is a countersunk hole, and the diameter of the bottom of the circular hole is larger than the diameter of the opening of the circular hole. The rotating shaft 12 is placed in the circular hole, and a cylindrical block is fixed to one end of the rotating shaft 12 at the bottom of the circular hole. The diameter of the cylindrical block is larger than the diameter of the opening of the circular hole.

[0042] When the vertical rod 1 moves up and down along the round rod 4 or rotates around the round rod 4, the cylindrical block keeps the round rod 4 from separating from the vertical rod 1. When the vertical rod 1 swings outward and the rotating rod 12 rotates around the axis, the cylindrical block keeps the rotating shaft 12 from separating from the vertical rod 1.

[0043] In use, multiple anti-collision units are installed on both sides of the road 21, and the vertical rods 1 of adjacent anti-collision units are connected together by elastic ropes. When a vehicle hits the rectangular frame 2, it will first contact the anti-collision barrel 3, which provides a certain buffering effect. At the same time, the rectangular frame 2, vertical rods 1, and round rods 4 are displaced. The round rods 4 will drive the rectangular block 5 and piston rod 8 to move outward from the road 21. Because there are multiple ball bearings on the left and right sides of the rectangular block 5, the friction between the rectangular block 5 and the rectangular groove 20 is reduced. When the rectangular frame 2 is subjected to force, it can easily move the rectangular block 5 simultaneously via the round rods 4. Because there is a compression spring on the piston rod 8, the impact force of the vehicle also requires a certain amount of force to move the rectangular frame 2. The elastic force of the compression spring allows the movement of the rectangular frame 2 to further cushion the vehicle. When the movement of the rectangular frame 2 causes the slider 16 to contact the inclined surface on the push block 15, the push block 15 will cause the slider 16 to move upward along the fixed block 17 and pull the pull rope 14 to pull the pin 13 out of the vertical rod 1. The lower end of the rectangular frame 2 is opened, and then the anti-fall net 10 is pulled to wrap around the front of the vehicle to prevent the vehicle from rushing off the road 21. After the anti-fall net 10 wraps around the front of the vehicle, if the vehicle continues to move, the vertical rod 1 will move upward along the round rod 4, giving the vehicle more room to move, further reducing the impact force of the vehicle, preventing the vehicle from rushing off the road, and also preventing the anti-collision unit from being pulled and damaged.

[0044] As can be seen from the above usage process, after the vehicle impacts the rectangular frame 2, the compression springs on the anti-collision barrel 3 and piston rod 8 are first stressed. Then, the rectangular frame 2 is opened, and the front of the vehicle is wrapped by the anti-fall net 10, increasing the impact distance and reducing the impact force. Multiple buffers mitigate the impact force, therefore, the spring force on the piston rod 8 does not need to be too large. Furthermore, since the upper and lower ends of the rectangular frame 2 are mounted on the vertical rod 1 via the pivot 12 and pin 13, the pivot 12 and pin 13 rotate and move left and right within the vertical rod 1. The vertical rod 1 can rotate on the round rod 4. Therefore… When a vehicle impacts rectangular frame 2, if the impact angle between the vehicle and rectangular frame 2 is small and the force exerted on rectangular frame 2 is also small, the impact force of the vehicle can cause rectangular frame 2 to swing regardless of where the vehicle impacts rectangular frame 2. While swinging, rectangular frame 2 moves outward. Since the spring force on piston rod 8 is not very large, rectangular frame 2 can swing more, allowing the vehicle to continue moving forward in a straight line. This solves the problem that traditional guardrails will cause vehicles to continue moving forward along the crash barrier and overturn when the impact angle is small.

[0045] After the rectangular frame 2 moves a certain distance, the pin 13 can be pulled out from the vertical rod 1 by the push block 15 and the slider 16, so that the lower end of the rectangular frame 2 opens and the lower end of the rectangular frame 2 rotates through the pivot 12, pulling out the fall arrest net 10. The rectangular frame 2 and the fall arrest net 10 form a buffer space, allowing the vehicle to continue moving forward within the buffer space, increasing the vehicle's movement space, reducing the vehicle's impact force, and preventing the vehicle from running off the road. It also solves the problem of the vehicle having a large impact force and running off the road when the impact angle between the vehicle and the rectangular frame 2 is large.

[0046] When the round rod 4 moves outward from the road 21, it will drive the rectangular block 5 and the piston rod 8 to move outward. If the piston 7 moves too fast and the air intake of the air inlet 11 on the rear end face of the housing 6 is insufficient, the stop block 9 will also move outward under the negative pressure, opening the compensation hole. When the round rod 4 returns to the inside of the road 21, the stop block 9 will block the compensation hole under the action of the compression spring, and exhaust can only be discharged through the air inlet 11 on the rear end face of the housing 6. Adjust the size of the air inlet 11 on the rear end face of the housing 6 to make the round rod 4 return slowly, preventing the round rod 4 from suddenly returning and causing secondary damage to the vehicle.

Claims

1. A bridge guard rail, characterized in that, The application relates to a road anti-collision device, which comprises a plurality of anti-collision units arranged on both sides of a road (21), each anti-collision unit comprising two round rods (4), each round rod (4) being sleeved with a vertical rod (1) at the upper end, the vertical rod (1) moving up and down along the round rod (4) and not being separated from the round rod (4), the vertical rod (1) being rotatable on the round rod (4), the road (21) being provided with a through groove on both sides, the round rod (4) being inserted into the through groove, the round rod (4) being movable in and out along the transverse direction of the road (21) in the through groove, the round rod (4) being blocked when moving outwards of the road (21) in the through groove; A rectangular frame (2) is arranged between the two vertical rods (1), a plurality of anti-collision barrels (3) are arranged in the rectangular frame (2), the upper end of the left and right sides of the rectangular frame (2) is provided with a rotating shaft (12), the lower end of the left and right sides of the rectangular frame (2) is provided with an installation block, a pin shaft (13) is inserted into each installation block, the pin shaft (13) being movable left and right on the installation block, the rotating shaft (12) and the pin shaft (13) being inserted into the corresponding side of the vertical rod (1), the rotating shaft (12) and the pin shaft (13) being round rods and being rotatable and movable left and right in the vertical rod (1), the rotating shaft (12) not being separated from the vertical rod (1), when the rectangular frame (2) is not stressed, the pin shaft (13) is inserted into the vertical rod (1), when the rectangular frame (2) is stressed to move outwards of the road (21), the pin shaft (13) is pulled out of the vertical rod (1) and separated from the vertical rod (1) to make the lower end of the rectangular frame (2) rotate around the rotating shaft (12); A road (21) below the rectangular frame (2) is provided with a giving-up groove (19), the giving-up groove (19) being provided with an anti-falling hanging net (10), one end of the anti-falling hanging net being fixed in the giving-up groove (19), the other end of the anti-falling hanging net (10) being connected to the lower end of the rectangular frame (2). The left and right ends of the pin shaft (13) are respectively arranged on the two sides of the mounting block, a spring is sleeved on the pin shaft (13) arranged on the inner side of the mounting block, one end of the spring is fixed on the mounting block, and the other end of the spring is fixed on the pin shaft (13), the lower end of the rectangular frame (2) is fixed with two left and right fixed blocks (17), the fixed blocks (17) are spaced apart, the left and right pin shafts (13) are connected together through a pull rope (14), the pull rope (14) passes through the fixed blocks (17), in the initial state, the pin shaft (13) is inserted into the vertical rod (1), and the pull rope (14) is in a taut state; a sliding block (16) capable of moving up and down along the fixed blocks (17) is arranged between the two fixed blocks (17), a recess arranged in up and down directions is formed in the end face of each of the two fixed blocks (17) adjacent to each other, a limiting block is arranged at the left and right ends of the sliding block, the sliding block (16) is arranged in the recess through the limiting block, so that the sliding block (16) moves up and down on the fixed blocks (17), the sliding block (16) is fixed on the pull rope (14), a push block (15) fixed on the road surface is arranged below the sliding block (16), the lower end face of the sliding block (16) and the upper end face of the push block (15) are corresponding inclined surfaces, when the rectangular frame (2) moves outward of the road (21) to make the sliding block (16) contact the inclined surface on the push block (15), the push block (15) moves the sliding block (16) upward on the fixed blocks (17), and the pull rope (14) is pulled to pull out the pin shaft (13) from the vertical rod (1).

2. The bridge guardrail according to claim 1, wherein, The lower end of the circular rod (4) is provided with a sink (18) arranged below the road surface, the sink (18) is arranged in the transverse direction of the road (21) and the opening of the sink (18) faces outward of the road (21), the through groove is arranged to penetrate through the sink (18), a shell (6) is fixed in the sink (18), air inlet holes (11) are formed in the front and rear end faces of the shell (6), the air inlet hole (11) at the front end is larger than the air inlet hole (11) at the rear end, a piston rod (8) is arranged in the shell (6) and arranged in the transverse direction of the road (21), one end of the piston rod (8) is arranged outside the front end face of the shell (6), a piston (7) is fixed to the other end of the piston rod (8) in the shell (6), the piston rod (8) drives the piston (7) to move back and forth, a compression spring is sleeved on the piston rod (8), one end of the compression spring is in contact with the piston (7), and the other end of the compression spring is in contact with the front end face of the shell (6), and the lower end of the circular rod (4) is fixed with the piston rod (8) arranged outside the shell (6).

3. A bridge guardrail according to claim 2, characterised in that The upper portion of the sink (18) is provided with a rectangular groove (20) under the road surface, the outer end of the rectangular groove (20) penetrates the road (21), the rectangular groove (20) is in the same direction as the sink (18), the through groove penetrates the lower end of the rectangular groove (20), the rectangular groove (20) is provided with a rectangular block (5) moving in the transverse direction of the road (21), the left and right ends of the rectangular block (5) are provided with a plurality of ball bearings, and the circular rod (4) is inserted into the rectangular block (5) through the through groove; the rectangular block (5) provides a stable mounting base for the circular rod (4), when the circular rod (4) is forced to move outward of the road (21), the circular rod (4) drives the rectangular block (5) to move together, ensuring the stability of the circular rod (4) during movement, and the rectangular block (5) greatly reduces the moving resistance of the rectangular block (5) by using the ball bearings at the left and right ends, so that as long as the circular rod (4) is forced, the circular rod (4) can move outward of the road (21).

4. A bridge parapet according to claim 2 or 3, characterised in that, The cavity of the shell (6) is provided with a fixed plate behind the piston (7), the fixed plate is breathable, a cross rod is inserted and mounted on the fixed plate, the cross rod moves forward and backward on the fixed plate, the rear end of the cross rod is fixedly provided with a semicircular block (9), the rear end face of the shell (6) is conical, the center position of the conical rear end face is provided with a gas compensation hole, a compression spring is sleeved on the cross rod, one end of the compression spring is in contact with the block (9), the other end of the compression spring is in contact with the fixed plate, the compression spring makes the block (9) snap-fit on the compensation hole to block the compensation hole, and the air inlet hole (11) on the conical rear end face of the shell (6) is smaller than the compensation hole.

5. The bridge guardrail of claim 1, wherein The other end of the anti-falling net (10) is connected to the lower side of the rectangular frame (2) through an elastic rope; after the vehicle hits and pulls out the anti-falling net (10) from the gap slot (19), the elastic rope can further increase the inertia of the vehicle, reduce the impact of the vehicle on the anti-falling net (10), and also reduce the impact force on the vehicle.

6. The bridge guardrail of claim 1, wherein The vertical rods (1) between the adjacent two anti-collision units are connected together through elastic ropes.

7. The bridge guardrail of claim 1, wherein The through groove does not penetrate the outer end face of the road (21).

8. The bridge guardrail of claim 1, wherein The vertical rod (1) is a rectangular rod, a circular counterbore is formed in the lower end face of the vertical rod (1), the diameter of the bottom of the circular counterbore is greater than the diameter of the opening of the circular counterbore, the circular rod (4) is arranged in the circular counterbore, and a cylindrical block is fixedly connected to the upper end of the circular rod (4), and the diameter of the cylindrical block is greater than the diameter of the opening of the circular counterbore; The end face of the vertical rod (1) close to the rectangular frame (2) is provided with a circular hole, the circular hole is a counterbore, the diameter of the bottom of the circular hole is greater than the diameter of the opening of the circular hole, the rotating shaft (12) is arranged in the circular hole, one end of the rotating shaft (12) located at the bottom of the circular hole is fixedly provided with a cylindrical block, and the diameter of the cylindrical block is greater than the diameter of the opening of the circular hole.

Images