A municipal road bridge pier protection device

Abstract

This application relates to a protective device for municipal road bridge piers, belonging to the field of bridge pier technology. It includes an installation frame fitted onto the bridge pier, with an impact rod rotatably mounted on the water flow impact surface of the installation frame. The impact rod is located at the vertical centerline of the water flow impact surface, and its rotation axis is parallel to the depth direction of the bridge pier. An impact plate, C-shaped, is mounted on one end of the impact rod away from the installation frame and bent towards the water flow direction on both sides of the bridge pier. The impact rod is a telescopic structure. The protective device also includes a transfer component that, when the impact plate drives the impact rod to impact the bridge pier, drives the impact rod to rotate, thereby deflecting a vessel away from the bridge pier. A buffer airbag is mounted on the installation frame and arranged circumferentially along the frame. This application effectively reduces the impact force on bridge piers.

Description

Technical Field

[0001] The present application relates to the technical field of bridge piers, and in particular to a municipal road bridge pier protection device. Background Art

[0002] The bridge pier is a substructure that supports the span structure and transmits the dead load and vehicle live load to the foundation. The abutment is located on both sides of the bridge. The bridge pier is between the two abutments. The function of the bridge pier is to support the span structure, while the abutment not only supports the span structure, but also connects with the embankment and prevents the embankment from sliding. The bridge pier is divided into solid piers, column piers, and frame piers. According to the plane shape, it can be divided into rectangular piers, pointed piers, circular piers, etc. The materials for building bridge piers can be wood, stone, concrete, reinforced concrete, steel, etc. At present, after the construction of the bridge pier is completed, a protective plate will be set on the outer wall of the bridge pier to reduce the direct impact force of ships and other objects on the main body of the bridge pier and increase the service life of the bridge pier.

[0003] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: when a ship collides with a protective plate, the protective plate directly transmits the impact force to the bridge pier, causing the bridge pier to be subjected to a greater impact force, which can easily cause the bridge pier to be damaged. Summary of the invention

[0004] In order to reduce the impact force of bridge piers, the present application provides a municipal road bridge pier protection device.

[0005] The municipal road bridge pier protection device provided in this application adopts the following technical solution:

[0006] A municipal road pier protection device comprises a mounting frame sleeved on the pier, a water flow impact surface of the mounting frame is rotatably provided with an impact rod, the impact rod is located at the vertical center line of the water flow impact surface, the rotation axis of the impact rod is parallel to the depth direction of the pier, an impact plate is provided at the end of the impact rod away from the mounting frame, the impact plate is C-shaped, and the impact plates are located on both sides of the pier and bent toward the water flow direction, the impact rod is a retractable structure, the protection device also comprises a transfer member that drives the impact rod to rotate to drive a ship to deviate from the pier when the impact plate drives the impact rod to impact the pier; a cushioning airbag is provided on the mounting frame and along the circumference of the mounting frame.

[0007] By adopting the above technical solution, when the above protective device is used, the impact rod and the impact plate are facing the direction of the water flow, so that when the water flows through the impact plate, the water flows toward the two sides of the impact plate to reduce the impact of the water flow on the impact plate; when there is a possibility of a ship colliding with a bridge pier, when the ship collides with the impact plate, the ship drives the impact rod to contract, and during the contraction process, the impact rod is driven to rotate under the action of the transfer member, and the rotation of the impact rod drives the impact plate to deviate, and the deflection of the impact plate adjusts the heading of the ship, so that the ship and the ship are offset, thereby reducing the impact force of the ship on the bridge pier; further, when the ship collides with the impact plate, the impact plate converts part of the impact force into work on the impact rod during the contraction process, thereby reducing the impact force of the ship on the bridge pier; when the ship does not collide with the impact plate, the ship hits the buffer airbag, and under the action of the reverse thrust of the buffer airbag, the heading of the ship is adjusted, further reducing the impact force on the bridge pier; the impact plate is C-shaped, so that when the ship collides with the impact plate, the ship slides along the impact surface of the impact plate, so that the ship runs offset.

[0008] Optionally, a hinge shaft is rotatably provided on the mounting frame, and the length direction of the hinge shaft is parallel to the depth direction of the pier; the impact rod is fixedly provided on the hinge shaft, and the impact rod includes a fixed rod provided on the hinge shaft and a sliding rod slidably provided in the fixed rod; the impact rod also includes a buffer member for slowing down the sliding tendency of the sliding rod when the sliding rod slides toward the fixed rod; the transfer member includes a first gear rotatably provided on the fixed rod, and the rotation axis of the first gear is parallel to the height direction of the pier; a first rack meshing with the first gear is provided on the sliding rod; a worm is rotatably provided on the fixed rod, and a bevel gear meshing with each other is provided between the worm and the first gear, and the rotation axis of the worm is perpendicular to the rotation axis of the first gear; a worm wheel meshing with the worm is rotatably provided on the fixed rod, and a first conveyor belt is provided between the worm wheel and the hinge shaft.

[0009] By adopting the above technical solution, when a ship hits the impact plate, the impact plate drives the sliding rod to slide toward the fixed rod, the sliding of the sliding rod drives the first rack to slide, the sliding of the first rack drives the first gear to rotate, the rotation of the first gear drives the bevel gear to rotate, and then drives the worm to rotate, the rotation of the worm drives the worm wheel to rotate, the rotation of the worm wheel drives the first conveyor belt to run, and then the operation of the first conveyor belt drives the articulated shaft to rotate, the rotation of the articulated shaft drives the impact rod to rotate, and then the heading of the ship is changed, and the operation is simple and convenient; further, under the action of the worm wheel and the worm, the possibility of the impact rod rotating due to the impact of the water flow is reduced, which is convenient for the impact plate to adjust the heading of the ship; under the action of the buffer, the sliding drive of the sliding rod is buffered, and during the buffering process, the impact force of the ship on the bridge pier is further reduced.

[0010] Optionally, a cavity for the sliding rod to slide is defined in the fixed rod, the buffer component comprises a first airbag disposed in the cavity, and the sliding rod abuts against the first airbag.

[0011] By adopting the above technical solution, when the ship hits the impact plate, the impact plate drives the sliding rod to slide, and the sliding of the sliding rod compresses the first airbag, and the impact force does work on the gas in the first airbag, thereby reducing the impact force of the ship on the bridge pier; at the same time, the first airbag buffers the movement trend of the sliding rod, which has the advantage of good buffering effect; further, when the ship is separated from the impact plate, the gas in the first airbag does work on the first airbag, so that the first airbag returns to its initial position, and the first airbag drives the sliding rod to slide away from the fixed rod, thereby driving the first gear to reverse, and the rotation of the first gear drives the bevel gear to rotate, thereby driving the worm to rotate, and the rotation of the worm drives the worm wheel to rotate, and the rotation of the worm wheel drives the first conveyor belt to run, and then the operation of the first conveyor belt drives the hinge shaft to rotate, and the rotation of the hinge shaft drives the impact rod to rotate, so that the impact rod rotates to the initial position, reducing the process of staff adjusting the impact rod and saving manpower.

[0012] Optionally, the impact rod is located on the center line of the water flow impact surface of the bridge pier, the impact plate is located on the water surface, and the angle between the impact rod and the bridge pier located on the water surface is an acute angle.

[0013] By adopting the above technical solution, an acute angle is formed between the impact rod and the bridge pier. Under the action of the angle, the impact force applied by the impact rod to the bridge pier is decomposed into vertical and horizontal directions. The vertical impact force acts on the river bottom, further reducing the force of the ship on the bridge pier.

[0014] Optionally, an elastic plate is provided on the impact surface of the impact plate, the elastic plate is bent into a triangle, the elastic plates are slidably provided on both sides of the pier, and both sides of the elastic plate slide along the arc surface of the impact plate.

[0015] By adopting the above technical solution, the water flow passing through the elastic plate is separated under the action of the elastic plate, thereby reducing the impact force of the water flow on the impact plate; at the same time, the two sides of the elastic plate are slidably arranged on the impact plate, reducing the possibility of damage to the elastic plate when the ship collides.

[0016] Optionally, the impact plate includes a first plate body and a second plate body, and the first plate body and the second plate body are symmetrically arranged along the direction of water flow and along the sliding rod. The protective device also includes an adjusting component for causing the impact rod to rotate counterclockwise or clockwise and drive the ship away from the pier when the ship hits the first plate body or the second plate body.

[0017] By adopting the above technical solution, when the ship collides with the impact plate, the impact point may be located on the first plate body and the second plate body; when the impact point is located on the first plate body, under the action of the adjusting member, the impact rod is driven to rotate counterclockwise or clockwise, thereby causing the ship to deviate; when the impact point is located on the second plate body, the impact rod is driven to rotate in the direction opposite to the above direction, causing the ship to deviate; under the action of the adjusting member, the impact rod is rotated at a smaller angle, causing the ship to deviate from the pier, thereby reducing the possibility of the ship colliding with the pier; at the same time, it is convenient for the ship to quickly deviate from the pier.

[0018] Optionally, two first racks are provided, the two first racks are symmetrically distributed along the axis of the sliding rod, the two first racks are located in the same plane and parallel to the water surface, the first gears are respectively located on both sides of the sliding rod and are respectively meshed with the first racks, the worm wheel and the worm are each provided with two groups, and the rotation directions of the two groups of worms are opposite; the first rack is slidably set on the sliding rod, and the sliding direction of the first rack is perpendicular to the length direction of the sliding rod, and the adjusting member includes another rack of the first rack corresponding to the first plate body and the second plate body, which is used to drive the first plate body and the second plate body to slide and separate from the first gear when the ship collides with the first plate body or the second plate body.

[0019] By adopting the above technical solution, when the ship hits the first plate body, the first rack corresponding to the second plate body is driven to slide and separate from the first gear. When the sliding rod slides, the first rack is driven to slide. Since the first rack corresponding to the second plate body is in a separated state from the first gear, the first gear corresponding to the first plate body rotates, thereby driving the impact rod to rotate. Similarly, when hitting the second plate body, the first rack corresponding to the first plate body is separated from the first gear, thereby driving the impact rod to rotate. In the above two states, the impact rod has opposite rotation directions, so that the ship deviates from the pier by the shortest path.

[0020] Optionally, the adjusting member includes a second airbag arranged on the impact surface of the first plate body and the second plate body and an abutment rod arranged on the second airbag, the abutment rod and the sliding rod are staggered, the two abutment rods are staggered, the abutment rod on the first plate body abuts on the first rack corresponding to the second plate body, and the abutment rod on the second plate body abuts on the first rack corresponding to the first plate body, and the adjusting member also includes an elastic member for driving the first rack to slide and engage with the first gear after the ship is separated from the second airbag.

[0021] By adopting the above technical solution, when the ship collides with the first plate body or the second plate body, the second airbag is compressed, the compression of the second airbag drives the abutment rod to slide, and the sliding of the abutment rod drives the first rack to slide, thereby separating the first rack from the first gear, and the operation is simple and convenient; when the ship is separated from the second airbag, under the action of the elastic member, the first rack is driven to slide and engage with the first gear.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. When the above-mentioned protective device is used, the impact rod and the impact plate are facing the direction of the water flow, so that when the water flows through the impact plate, the water flows toward the two sides of the impact plate to reduce the impact of the water flow on the impact plate; when there is a possibility of a ship colliding with a bridge pier, when the ship collides with the impact plate, the ship drives the impact rod to contract, and during the contraction process, the impact rod is driven to rotate under the action of the transfer member, and the rotation of the impact rod drives the impact plate to deviate, and the deflection of the impact plate adjusts the heading of the ship, so that the ship and the ship are offset, thereby reducing the impact force of the ship on the bridge pier; further, when the ship collides with the impact plate, the impact plate converts part of the impact force to do work on the impact rod during the contraction process, thereby reducing the impact force of the ship on the bridge pier; when the ship does not collide with the impact plate, the ship hits the buffer airbag, and under the action of the reverse thrust of the buffer airbag, the heading of the ship is adjusted, further reducing the impact force on the bridge pier; the impact plate is C-shaped, so that when the ship collides with the impact plate, the ship slides along the impact surface of the impact plate, so that the ship runs offset. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of a municipal road bridge pier protection device according to an embodiment of the present application;

[0025] Figure 2 It is a cross-sectional view of an impact rod in a municipal road bridge pier protection device according to an embodiment of the present application;

[0026] Figure 3 yes Figure 2 A magnified schematic diagram of part A;

[0027] Figure 4 yes Figure 2 Side view of

[0028] Figure 5 yes Figure 2 Schematic diagram of the enlarged portion B.

[0029] Description of reference numerals: 1. bridge pier; 2. installation frame;

[0030] 3. Impact rod; 31. Fixed rod; 32. Sliding rod; 33. Cavity;

[0031] 4. impact plate; 41. first plate body; 42. second plate body;

[0032] 5. Transfer member; 51. First gear; 52. First drive rod; 53. First rack; 54. Worm; 55. Bevel gear; 56. Worm wheel; 57. First conveyor belt;

[0033] 6. hinge shaft; 7. first airbag; 8. elastic plate;

[0034] 9. Slide groove; 10. Second airbag; 11. Abutment rod; 12. Spring. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-5 This application is described in further detail.

[0036] The present application embodiment discloses a municipal road bridge pier protection device. Figure 1 The protection device of the municipal road pier 1 includes a mounting frame 2 mounted on the pier 1, a water flow impact surface of the mounting frame 2 is rotatably provided with an impact rod 3, the impact rod 3 is located at the vertical center line of the water flow impact surface, the rotation axis of the impact rod 3 is parallel to the depth direction of the pier 1, and an impact plate 4 is fixedly provided at one end of the impact rod 3 away from the mounting frame 2, the impact plate 4 is C-shaped, and the impact plate 4 is located on both sides of the pier 1 and is bent toward the water flow direction. The impact rod 3 is a retractable structure. The protection device also includes a transfer member 5 that drives the impact rod 3 to rotate to drive the ship to deviate from the pier 1 when the impact plate 4 drives the impact rod 3 to impact the pier 1.

[0037] When the ship hits the impact plate 4, the transfer member 5 drives the impact rod 3 to rotate, and the rotation of the impact rod 3 drives the impact plate 4 to rotate. The impact rod 3 applies a thrust to the ship away from the pier 1, thereby driving the ship to deviate away from the pier 1 to reduce the impact force of the ship on the pier 1.

[0038] Reference Figure 1 In order to reduce the possibility of the ship hitting the side wall of the pier 1, a cushioning airbag is arranged on the mounting frame 2 and along the circumference of the mounting frame 2, and the cushioning airbag floats on the water surface; under the action of the cushioning airbag, the pier 1 and the ship are relatively separated, thereby reducing the impact degree of the ship on the pier 1.

[0039] Reference Figure 1 and Figure 2 In the embodiment of the present application, a hinge shaft 6 is rotatably provided on the mounting frame 2. Further, the mounting frame 2 is fixedly provided with two mounting plates, the hinge shaft 6 is rotatably provided between the two mounting plates, the length direction of the hinge shaft 6 is parallel to the depth direction of the pier 1, the impact rod 3 is fixedly provided on the hinge shaft 6, the impact rod 3 includes a fixed rod 31 provided on the hinge shaft 6 and a sliding rod 32 slidably provided in the fixed rod 31, the sliding rod 32 slides along the length direction of the fixed rod 31, further, a cavity 33 for sliding the sliding rod 32 is provided in the fixed rod 31, the impact rod 3 also includes a buffer for slowing down the sliding tendency of the sliding rod 32 when the sliding rod 32 slides toward the fixed rod 31, the buffer includes a first airbag 7 provided in the cavity 33, the sliding rod 32 abuts against the first airbag 7, and the peripheral wall of the first airbag 7 abuts against the side wall of the cavity 33.

[0040] When the ship compresses the impact plate 4, the sliding rod 32 compresses the first airbag 7. During the compression process, the first airbag 7 performs work on the gas in the first airbag 7, thereby buffering the impact force of the ship.

[0041] Reference Figure 2 and Figure 3 In the embodiment of the present application, the transfer member 5 includes a first gear 51 rotatably set on the fixed rod 31, a first driving rod 52 rotatably set on the first fixed rod 31, the first gear 51 is coaxially set on the first driving rod 52, the rotation axis of the first gear 51 is parallel to the height direction of the pier 1, a first rack 53 meshing with the first gear 51 is set on the sliding rod 32, further, the first rack 53 is located on both sides of the sliding rod 32, a worm 54 is rotatably set on the fixed rod 31, a bevel gear 55 meshing with each other is set between the worm 54 and the first gear 51, further, the bevel gear 55 is located on the worm 54 and the first driving rod 52, the rotation axis of the worm 54 is perpendicular to the rotation axis of the first gear 51, a worm wheel 56 meshing with the worm 54 is rotatably set on the fixed rod 31, the rotation axis of the worm wheel 56 is parallel to the rotation axis of the hinge shaft 6, and a first conveyor belt 57 is set between the worm wheel 56 and the hinge shaft 6.

[0042] After the ship hits the impact plate 4, the sliding rod 32 drives the first rack 53 to slide. After the first rack 53 engages with the first gear 51, the first rack 53 drives the first gear 51 to rotate. The rotation of the first gear 51 drives the bevel gear 55 to rotate, which in turn drives the worm 54 to rotate. The rotation of the worm 54 drives the worm wheel 56 to rotate. The rotation of the worm wheel 56 drives the first conveyor belt 57 to run. The operation of the first conveyor belt 57 drives the articulated shaft 6 to rotate. The rotation of the articulated shaft 6 drives the impact rod 3 to rotate, thereby changing the heading of the ship. The operation is simple and convenient.

[0043] Reference Figure 1 In order to further reduce the impact force of the ship on the pier 1, the impact rod 3 is located on the center line of the water flow impact surface of the pier 1, the impact plate 4 is located on the water surface, and the angle between the impact rod 3 and the pier 1 located on the water surface is an acute angle. Furthermore, the impact rod 3 is inclined in the direction away from the water surface; in the embodiment of the present application, the fixing rod 31 is obliquely installed on the hinge shaft 6. The impact rod 3 decomposes the impact force to the direction parallel to the height of the pier 1, thereby reducing the impact force on the pier 1.

[0044] Reference Figure 1In order to reduce the possibility that the water flow accidentally drives the impact rod 3 to rotate, an elastic plate 8 is provided on the impact surface of the impact plate 4. The elastic plate 8 is a rubber plate. The elastic plate 8 is bent into a triangle. The elastic plates 8 are located on both sides of the pier 1 and are slidably arranged on the impact plate 4. Both sides of the elastic plate 8 slide along the arc surface of the impact plate 4. Under the action of the elastic plate 8, the water flow passing through the elastic plate 8 is diverted, thereby reducing the impact force of the water flow on the impact plate 4.

[0045] Reference Figure 2 and Figure 3 In order to facilitate the ship to deviate from the pier 1 at the shortest distance, the impact plate 4 includes a first plate body 41 and a second plate body 42, and the first plate body 41 and the second plate body 42 are symmetrically arranged along the water flow direction and along the sliding rod 32. The protective device also includes an adjusting member for causing the impact rod 3 to rotate counterclockwise or clockwise and drive the ship to deviate from the pier 1 when the ship hits the first plate body 41 or the second plate body 42. In the embodiment of the present application, the first plate body 41 is located upstream along the water flow direction, and the second plate body 42 is located downstream along the water flow direction; when the ship impacts the first plate body 41, under the action of the adjusting member, the impact rod 3 is driven to rotate counterclockwise, so that the ship deviates quickly; when the ship impacts the second plate body 42, the impact rod 3 is driven to rotate clockwise, so that the ship deviates quickly.

[0046] Reference Figure 2 and Figure 3 In the embodiment of the present application, two first racks 53 are provided, and the two first racks 53 are symmetrically distributed along the axis of the sliding rod 32. Further, the teeth of the two first racks 53 are opposite to each other, and the two first racks 53 are located in the same plane and parallel to the water surface. The first gears 51 are respectively located on both sides of the sliding rod 32 and mesh with the first racks 53 respectively. The worm wheel 56 and the worm 54 are both provided with two groups, and the rotation directions of the two groups of worms 54 are opposite. Further, the first conveyor belt 57 has two, and are respectively connected to the hinge shaft 6; the first rack 53 is slidably arranged on the sliding rod 32, and a slide groove 9 for the first rack 53 to slide is provided on the side wall of the sliding rod 32, the openings of the two slide grooves 9 are away from each other, and the sliding direction of the first rack 53 is perpendicular to the length direction of the sliding rod 32, and the adjusting member includes another rack of the first rack 53 corresponding to the first plate body 41 and the second plate body 42, which is used to drive the first plate body 41 and the second plate body 42 to slide and separate from the first gear 51 when the ship hits the first plate body 41 or the second plate body 42;

[0047] Reference Figure 4The adjusting member includes a second airbag 10 arranged on the impact surface of the first plate body 41 and the second plate body 42 and an abutment rod 11 arranged on the second airbag 10. Further, the abutment rod 11 slides through the first plate body 41 and the second plate body 42. The abutment rod 11 and the sliding rod 32 are staggered. The two abutment rods 11 are staggered. The abutment rod 11 on the first plate body 41 abuts on the first rack 53 corresponding to the second plate body 42, and the abutment rod 11 on the second plate body 42 abuts on the first rack 53 corresponding to the first plate body 41.

[0048] When the ship abuts against the first plate body 41, the ship compresses the second airbag 10 on the first plate body 41 to drive the abutment rod 11 to slide, and the sliding of the abutment rod 11 drives the first rack 53 corresponding to the second plate body 42 to slide, and the first rack 53 slides toward the bottom wall direction of the slide groove 9, so that the first rack 53 is separated from the first gear 51, and at the same time, the first gear 51 and the first rack 53 corresponding to the first plate body 41 are in a meshing state; then the first rack 53 drives the first gear 51 to rotate, and the rotation of the first gear 51 drives the bevel gear 55 to rotate, thereby driving the worm 54 to rotate, and the rotation of the worm 54 drives the worm wheel 56 to rotate, and the rotation of the worm wheel 56 drives the first conveyor belt 57 to run, and then the operation of the first conveyor belt 57 drives the hinge shaft 6 to rotate, and the rotation of the hinge shaft 6 drives the impact rod 3 to rotate; in the above process, the hinge shaft 6 and the first conveyor belt 57 corresponding to the second plate body 42 are in a relative rotation state with the hinge shaft 6, so that the impact rod 3 can only rotate counterclockwise. Meanwhile, when the ship hits the second plate 42, the impact rod 3 can only rotate clockwise.

[0049] Reference Figure 2 and Figure 5 The adjusting member also includes an elastic member for driving the first rack 53 to slide and engage with the first gear 51 after the ship is separated from the second airbag 10. In the embodiment of the present application, the elastic member includes a spring 12 arranged in the slide groove 9, one side of the spring 12 is fixedly arranged on the first rack 53, and the other side is arranged on the bottom wall of the slide groove 9.

[0050] The implementation principle of a municipal road bridge pier 1 protection device in the embodiment of the present application is:

[0051] If a ship accidentally hits the bridge pier 1, the contact point between the ship and the bridge pier 1 is located at the impact plate 4 or the buffer airbag;

[0052] Under the action of the buffer airbag, the bridge pier 1 and the ship are relatively separated, thereby reducing the impact degree of the ship on the bridge pier 1;

[0053] When the ship hits the first plate body 41, the ship compresses the second airbag 10 on the first plate body 41 to drive the abutment rod 11 to slide, and the sliding of the abutment rod 11 drives the first rack 53 corresponding to the second plate body 42 to slide, and the first rack 53 slides toward the bottom wall of the slide groove 9, so that the first rack 53 is separated from the first gear 51. At the same time, the first gear 51 and the first rack 53 corresponding to the first plate body 41 are in a meshing state; then the first rack 53 drives the first gear 51 to rotate, and the rotation of the first gear 51 drives the bevel gear 55 to rotate, thereby driving the worm 54 to rotate, and the rotation of the worm 54 drives the worm wheel 56 to rotate, and the rotation of the worm wheel 56 drives the first conveyor belt 57 to run, and then the operation of the first conveyor belt 57 drives the articulated shaft 6 to rotate, and the rotation of the articulated shaft 6 drives the impact rod 3 to rotate, thereby adjusting the heading of the ship, so that the ship and the pier 1 are offset to reduce the impact degree of the ship on the pier 1.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A municipal road bridge pier protection device, characterized in that: The invention comprises a mounting frame (2) sleeved on a pier (1); a water flow impact surface of the mounting frame (2) is rotatably provided with an impact rod (3); the impact rod (3) is located at the vertical center line of the water flow impact surface; the rotation axis of the impact rod (3) is parallel to the depth direction of the pier (1); an impact plate (4) is provided at one end of the impact rod (3) away from the mounting frame (2); the impact plate (4) is C-shaped; the impact plate (4) is located on both sides of the pier (1) and is bent toward the water flow direction; the impact rod (3) is a telescopic structure; the protective device further comprises a transfer member (5) which drives the impact rod (3) to rotate so as to drive the ship to deviate from the pier (1) when the impact plate (4) drives the impact rod (3) to impact the pier (1); a buffer air bag is provided on the mounting frame (2) and along the circumference of the mounting frame (2); The mounting frame (2) is rotatably provided with a hinge shaft (6), the length direction of the hinge shaft (6) being parallel to the depth direction of the pier (1), the impact rod (3) being fixedly provided on the hinge shaft (6), the impact rod (3) comprising a fixed rod (31) provided on the hinge shaft (6) and a sliding rod (32) slidably provided in the fixed rod (31), the impact rod (3) further comprising a buffer member for slowing down the sliding tendency of the sliding rod (32) when the sliding rod (32) slides toward the fixed rod (31); the transfer member (5) comprises a first gear (51) rotatably provided on the fixed rod (31), the first gear (51) being The rotation axis of the gear (51) is parallel to the height direction of the pier (1); the sliding rod (32) is provided with a first rack (53) meshing with the first gear (51); a worm (54) is rotatably provided on the fixed rod (31); a bevel gear (55) meshing with each other is provided between the worm (54) and the first gear (51); the rotation axis of the worm (54) is perpendicular to the rotation axis of the first gear (51); a worm wheel (56) meshing with the worm (54) is rotatably provided on the fixed rod (31); a first conveyor belt (57) is provided between the worm wheel (56) and the hinge shaft (6); The impact plate (4) comprises a first plate body (41) and a second plate body (42), wherein the first plate body (41) and the second plate body (42) are symmetrically arranged along the water flow direction and along the sliding rod (32), and the protection device further comprises an adjusting member for causing the impact rod (3) to rotate counterclockwise or clockwise and drive the ship to deviate from the bridge pier (1) when the ship hits the first plate body (41) or the second plate body (42); Two first racks (53) are provided, and the two first racks (53) are symmetrically distributed along the axis of the sliding rod (32), and the two first racks (53) are located in the same plane and parallel to the water surface. The first gear (51) is respectively located on both sides of the sliding rod (32) and is respectively meshed with the first racks (53). The worm wheel (56) and the worm (54) are both provided with two groups, and the rotation directions of the two groups of worms (54) are opposite. The first rack (53) is slidably provided on the sliding rod (32), and the sliding direction of the first rack (53) is perpendicular to the length direction of the sliding rod (32). The adjusting member includes another rack of the first rack (53) corresponding to the first plate body (41) and the second plate body (42) for driving the first plate body (41) and the second plate body (42) to slide and separate from the first gear (51) when the ship collides with the first plate body (41) or the second plate body (42); The adjusting member comprises a second airbag (10) arranged on the impact surface of the first plate body (41) and the second plate body (42) and an abutting rod (11) arranged on the second airbag (10); the abutting rod (11) and the sliding rod (32) are arranged alternately; the two abutting rods (11) are arranged alternately; the abutting rod (11) on the first plate body (41) abuts against a first rack (53) corresponding to the second plate body (42); the abutting rod (11) on the second plate body (42) abuts against a first rack (53) corresponding to the first plate body (41); and the adjusting member further comprises an elastic member for driving the first rack (53) to slide and mesh with the first gear (51) after the ship is separated from the second airbag (10).

2. A municipal road bridge pier protection device according to claim 1, characterized in that: The fixed rod (31) is provided with a cavity (33) for the sliding rod (32) to slide, the buffer component comprises a first air bag (7) arranged in the cavity (33), and the sliding rod (32) abuts against the first air bag (7).

3. A municipal road bridge pier protection device according to claim 1, characterized in that: The impact rod (3) is located on the center line of the water flow impact surface of the bridge pier (1), the impact plate (4) is located on the water surface, and the angle between the impact rod (3) and the bridge pier (1) located on the water surface is an acute angle.

4. A municipal road bridge pier protection device according to claim 1, characterized in that: An elastic plate (8) is arranged on the impact surface of the impact plate (4), the elastic plate (8) is bent into a triangle, and the elastic plates (8) are slidably arranged on the impact plate (4) on both sides of the pier (1), and the two sides of the elastic plate (8) slide along the arc surface of the impact plate (4).

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