A bridge with height-limiting protection function

Abstract

This application relates to the field of bridge construction and specifically discloses a bridge with height-limiting protection, comprising a bridge body, a support shaft disposed on the bridge body, a base ring sleeved on the support shaft, the base ring rotatably connected to the support shaft, a base frame connected to the outer wall of the base ring, and a receiving bag connected between the inner walls of the base frame; a buffer positioning assembly disposed between the base frame and the bridge body, and a retractable assembly disposed on the receiving bag. This application can improve bridge safety.

Description

Technical Field

[0001] The present application relates to the field of bridge construction, and in particular to a bridge with height-limiting protection function. Background Art

[0002] A bridge is a structure built to cross natural or man-made obstacles. It is a very common structure throughout history. Bridges can be divided into beam bridges, arch bridges, rigid frame bridges, suspension bridges, cable-stayed bridges, etc.

[0003] The structure of a bridge usually includes the superstructure, substructure and ancillary structures. The superstructure includes the bridge span structure and support system; the substructure mainly consists of abutments, piers and foundations; the ancillary structures refer to the bridge head cladding, conical slope protection, bank protection, diversion projects, etc.

[0004] With respect to the above-mentioned related technologies, the inventors believe that since there is a certain height distance between the bridge and the ground or water surface, it is very dangerous if pedestrians accidentally fall from the bridge due to an accident. Summary of the Invention

[0005] In order to improve the safety of the bridge, the present application provides a bridge with a height-limiting protection function.

[0006] This application provides a bridge with height-limiting protection function, which adopts the following technical solutions:

[0007] A bridge with a height-limiting protection function comprises a bridge body, a support shaft is provided on the bridge body, a base ring is sleeved on the support shaft, the base ring and the support shaft are rotatably connected, a base frame is connected to the outer wall of the base ring, and a receiving bag is connected between the inner walls of the base frame; a buffer positioning assembly is provided between the base frame and the bridge body, and a retractable assembly is provided on the receiving bag.

[0008] By adopting the above technical solution, the receiving bag forms a protection on the side of the bridge body. Once someone climbs over the bridge body, the human body will first fall on the receiving bag, and the retractable component is triggered at this time; the retractable component can unfold the receiving bag, and the resistance during the unfolding process of the receiving bag will have a certain buffering effect on the descent of the human body; at the same time, after the receiving bag is unfolded to a certain extent, the base frame overcomes the positioning effect of the buffer positioning component and rotates. In the process of the base ring rotating around the support shaft, the buffer positioning component applies resistance to the rotation of the base frame of the base ring, so that the human body slowly stabilizes, reducing the damage to the human body and improving the safety of the bridge; moreover, the receiving bag can be used as a limit marker, and the receiving bag is more eye-catching, which is convenient for passing ships to find.

[0009] Optionally, the buffer positioning assembly includes a guide rod, a guide ball, a positioning ball and a limit spring, a guide ring groove is provided on the outer peripheral wall of the support shaft, the guide rod is provided on the base frame, the guide ball is provided at one end of the guide rod away from the base frame, the ball wall of the guide ball is in contact with the groove wall of the guide ring groove, an installation cavity groove is provided in the support shaft, the installation cavity groove and the guide ring groove are communicated with each other, there are several installation cavity grooves, a sliding rod is connected on the groove wall of the installation cavity groove for radial sliding along the support shaft, the positioning ball is provided at one end of the sliding rod facing the outside of the support shaft, the limit spring is fixedly connected between the end of the sliding rod away from the positioning ball and the groove wall of the installation cavity groove, the guide ball is located between the two positioning balls and abuts against the positioning ball.

[0010] By adopting the above technical solution, due to the supporting effect of the limit spring, the two positioning balls clamp the guide ball, so that the guide ball cannot rotate freely, and the base frame is positioned; after the receiving bag is expanded to a certain extent, most of the force generated by the human body falling is transferred to the base frame, at this time the guide ball presses against the positioning ball, the elastic force of the limit spring is overcome, the sliding rod slides, the limit spring undergoes elastic deformation, and the base frame rotates; and during the rotation process of the base frame, the positioning balls continuously hinder the sliding of the guide balls, so that the base frame can gradually become stable.

[0011] Optionally, the retractable assembly includes a buffer elastic rope and a connecting piece, one end of the buffer elastic rope is fixedly connected to the side wall of the receiving bag, and the other end of the buffer elastic rope is detachably connected to the receiving bag through the connecting piece; the length of the buffer elastic rope is less than the distance along the side wall of the receiving bag between the two points where the receiving bag is connected to the buffer elastic rope.

[0012] By adopting the above technical solution, the buffer elastic rope is connected to the receiving bag, so that the receiving bag can be stored; after a human body falls on the receiving bag, the receiving bag is forced to unfold, and the buffer elastic rope is stretched, and the buffer elastic rope can play a buffering role; finally, the connecting piece separates the buffer elastic rope and the receiving bag, and the receiving bag can be smoothly unfolded.

[0013] Optionally, a buoyancy block is provided on the receiving bag.

[0014] By adopting the above technical solution, for a bridge over water, once the receiving bag falls off the base frame, the buoyancy block can reduce the sinking of the human body, thereby buying time for rescue.

[0015] Optionally, a buoyancy frame is provided at the bag opening of the receiving bag, and the buoyancy frame is detachably connected to the frame wall of the base frame through a detachable part.

[0016] By adopting the above technical solution, for a bridge on water, the human body is located in the receiving bag, and the buoyancy frame and the base frame are separated, so that the buoyancy frame floats on the water surface to form a simple lifeboat, which is conducive to people leaving the receiving bag and facilitating rescue.

[0017] Optionally, the detachable part includes a connecting column, a first wrapping sheet and a second wrapping sheet, the connecting column is arranged on the side wall of the buoyancy frame away from the receiving bag and is a cylinder, one end of the first wrapping sheet and the second wrapping sheet are rotatably connected to the base frame, the first wrapping sheet and the second wrapping sheet are both in contact with the circumferential wall of the connecting column, the end of the first wrapping sheet away from the base frame and the end of the second wrapping sheet away from the base frame are both located on the side of the center of the connecting column close to the buoyancy frame, and there is a gap between the end of the first wrapping sheet away from the base frame and the end of the second wrapping sheet away from the base frame; a fixing plate is provided on the first wrapping sheet and the second wrapping sheet, the opposite side walls of the two fixing plates are on the same circle, the circle where the two fixing plates are located and the connecting column are coaxial, and a limiting ring and a fixing ring are sleeved on the opposite side walls of the two fixing plates, the inner wall of the limiting ring is in contact with the fixing plate, the inner wall of the fixing ring is threadedly connected to the fixing plate, and the fixing ring is located on the side of the limiting ring away from the first wrapping sheet.

[0018] By adopting the above technical solution, the fixing ring and the screw ring are connected to the fixing plate to limit the position of the limiting ring; the limiting ring is arranged around the side of the fixing plate to limit the position of the first and second wrapping sheets, so that the first and second wrapping sheets are stably attached to the connecting column, thereby stably limiting the position of the connecting column and stably connecting the connecting column to the base frame. At the same time, after removing the limiting ring and the fixing ring, due to the gap between the end of the first wrapping sheet away from the base frame and the end of the second wrapping sheet away from the base frame, the connecting column can easily break through the first and second wrapping sheets and leave the base frame.

[0019] Optionally, the receiving bag is made of a water-impermeable material, a drainage hole is provided on the receiving bag, and a sealing member is provided on the side wall of the receiving bag located around the drainage hole.

[0020] By adopting the above technical solution, the drainage hole can meet the daily drainage work of the receiving bag; and when the receiving bag enters the water, the sealing member closes the drainage hole, which can minimize the water entering the receiving bag, thereby gaining more time for rescue and reducing damage to people who fall into the water.

[0021] Optionally, the sealing member includes a folded edge, which is fixedly connected to the hole wall of the drainage hole, a through-hole is provided in the folded edge, a sliding hole communicating with the through-hole is provided on the side wall of the folded edge, a tensioning rope is fixedly connected to the side wall of the through-hole, the tensioning rope is arranged close to the sliding hole, and one end of the tensioning rope away from the end wall connected to the side wall of the through-hole extends out of the through-hole through the sliding hole, and a driving member for driving the tensioning rope to slide is provided on the receiving bag.

[0022] By adopting the above technical solution, the tensioning rope is pulled and extended out of the through-hole, so that the part of the tensioning rope located in the through-hole is folded and tightened, thereby sealing the drainage hole.

[0023] Optionally, the driving member includes a driving rope, one end of the driving rope is connected to an end of the tensioning rope extending out of the through-hole, and an end of the driving rope away from the tensioning rope is fixedly connected to the side wall of the receiving bag; the sum of the length of the tensioning rope extending out of the through-hole and the length of the driving rope is less than the distance between the point where the receiving bag is connected to the driving rope and the sliding hole along the side wall of the receiving bag.

[0024] By adopting the above technical solution, when the receiving bag is unfolded, the distance between the point where the receiving bag is connected to the driving rope and the sliding hole along the side wall of the receiving bag becomes larger, so that the driving rope can pull the tensioning rope out of the hole, which is convenient and quick.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. This application utilizes a receiving bag to protect the side of the bridge, reducing injuries caused by people falling directly onto the ground or into the water. Both the retractable and retractable components and the buffer positioning components can act as a buffer, allowing the person to slowly stabilize, reducing injuries to the person and improving the safety of the bridge.

[0027] 2. This application is equipped with a detachable buoyancy frame, which floats on the water surface and can form a simple lifeboat, which is conducive to people leaving the receiving bag and facilitating rescue;

[0028] 3. This application is provided with a drainage hole and a sealing member. The drainage hole can meet the daily drainage work of the receiving bag; and when the receiving bag enters the water, the sealing member closes the drainage hole to reduce the amount of water entering the receiving bag as much as possible, thereby buying more time for rescue. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a bridge with height-limiting protection function in an embodiment of the present application.

[0030] Figure 2It is a schematic diagram illustrating the receiving bag structure in the embodiment of the present application.

[0031] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0032] Figure 4 yes Figure 2 Cross-sectional view along line BB.

[0033] Figure 5 yes Figure 4 Enlarged view of point C in the middle.

[0034] Figure 6 It is an exploded view used to illustrate the detachable component structure in the embodiment of the present application.

[0035] Figure 7 It is a partial cross-sectional view used to illustrate the structure of the hole sealing member in the embodiment of the present application.

[0036] Figure 8 yes Figure 7 Enlarged view of point D in the middle.

[0037] Figure 9 yes Figure 7 Enlarged view of point E in the middle.

[0038] Figure 10 yes Figure 7 Enlarged view of point F in the middle.

[0039] Explanation of the accompanying drawings: 1. Bridge body; 2. Support shaft; 21. Base ring; 22. Guide ring groove; 23. Mounting cavity groove; 3. Base frame; 31. Receiving bag; 32. Buoyancy block; 33. Drainage hole; 4. Retractable assembly; 41. Buffer elastic rope; 42. Connecting piece; 5. Buffer positioning assembly; 51. Guide rod; 52. Guide ball; 53. Positioning ball; 54. Limiting spring; 56. Sliding rod; 6. Buoyancy frame; 7. Removable part; 71. Connecting column; 72. First wrapping piece; 73. Second wrapping piece; 74. Fixing plate; 75. Limiting ring; 76. Fixing ring; 8. Sealing piece; 81. Folding edge; 82. Passing channel; 83. Sliding hole; 84. Connecting piece; 85. Tensioning rope; 9. Driving piece; 91. Driving rope. DETAILED DESCRIPTION

[0040] The present application is further described in detail below with reference to the accompanying drawings.

[0041] An embodiment of the present application discloses a bridge with a height-limiting protection function.

[0042] like Figure 1 and Figure 2As shown, a bridge with height-limiting protection comprises a bridge body 1, which in this embodiment is an arched bridge body 1. A horizontal support shaft 2 is fixedly connected to the vertical sidewalls on both sides of the bridge body 1. In this embodiment, two base rings 21 are sleeved on each support shaft 2, and the base rings 21 are rotatably connected to the support shaft 2. A base frame 3 is fixedly connected to the outer walls of the two base rings 21 on the same support shaft 2, and a receiving bag 31 is connected between the inner walls of the base frame 3. A buffer positioning assembly 5 is provided between the base frame 3 and the bridge body 1, and a retractable assembly 4 is provided on the receiving bag 31.

[0043] In daily life, the buffer positioning assembly 5 secures the base frame 3, which is placed horizontally, and the receiving bag 31 is folded up by the retractable assembly 4. If someone accidentally falls from the bridge body 1, the falling person will first land on the receiving bag 31. As the person falls, the retractable assembly 4 gradually unfolds the receiving bag 31. When the falling person lands relatively stably in the receiving bag 31, the force acting on the receiving bag 31 is transferred to the base frame 3. At this time, the base frame 3 can overcome the positioning effect of the buffer positioning assembly 5 and rotate. During the rotation of the base frame 3, the buffer positioning assembly 5 creates resistance to the base frame 3, causing the base frame 3 to slowly swing until it stabilizes. At this point, the fallen person can be rescued.

[0044] like Figure 2 and Figure 3 As shown, the storage assembly 4 includes a buffer elastic cord 41 and a connector 42. One end of the buffer elastic cord 41 is fixedly connected to the vertical outer wall of the receiving bag 31. In this embodiment, the buffer elastic cords 41 are grouped together in three, and the buffer elastic cords 41 in each group are arranged along the storage direction of the receiving bag 31. The connector 42 in this embodiment can be Velcro, a button, etc. In this embodiment, the connector 42 is Velcro, and the free end of the buffer elastic cord 41 and the outer wall of the receiving bag 31 are fixedly connected to the Velcro patch. When the receiving bag 31 is stored, the free end of the buffer elastic cord 41 is connected to the outer wall of the receiving bag 31 via the Velcro. At this time, because the length of the buffer elastic cord 41 is less than the distance along the side wall of the receiving bag 31 between the two points where the receiving bag 31 connects to the buffer elastic cord 41, the side wall of the receiving bag 31 between the two ends of the buffer elastic cord 41 folds together. When a human body falls into the receiving bag 31 , the buffer elastic rope 41 is first pulled to play a buffering role, and finally the connecting member 42 loses its fixing function due to excessive force, and the receiving bag 31 can be unfolded.

[0045] like Figure 4 and Figure 5As shown, the buffer positioning assembly 5 includes a guide rod 51, a guide ball 52, a positioning ball 53, and a limit spring 54. A guide ring groove 22 is defined on the outer peripheral wall of the support shaft 2. One end of the guide rod 51 is fixedly connected to the side wall of the base frame 3 relative to the support shaft 2. The guide ball 52 is fixedly connected to the end of the guide rod 51 away from the base frame 3. The guide ball 52 is inserted into the guide ring groove 22, and the ball wall and the groove wall of the guide ring groove 22 are in contact. The side wall of the guide ring groove 22 at the notch is located on the side of the guide ball 52 that is closer to the guide rod 51. A mounting cavity 23 is defined within the support shaft 2. The mounting cavity 23 communicates with the guide ring groove 22. In this embodiment, there are ten mounting cavities 23, which are arranged along the circumference of the support shaft 2. A sliding rod 56 is connected to the wall of the mounting cavity 23 for radial sliding movement along the support shaft 2. The positioning ball 53 is fixedly connected to one end of the sliding rod 56 facing the outside of the support shaft 2. The limit spring 54 is fixedly connected between the end of the sliding rod 56 away from the positioning ball 53 and the wall of the mounting cavity 23. The guide ball 52 is located between the two positioning balls 53 and abuts against the positioning ball 53.

[0046] The two positioning balls 53 abut against the guide balls 52, and at the same time, under the limiting action of the limit springs 54, the guide balls 52 can be positioned and supported, thereby positioning and supporting the base frame 3; when the force on the receiving bag 31 is transferred to the base frame 3, the force of the guide balls 52 acting on the positioning balls 53 will increase. At this time, the limit springs 54 are compressed, the sliding rods 56 slide, and the positioning balls 53 move into the mounting cavity groove 23, so that the guide balls 52 can slide along the guide ring groove 22, and the base frame 3 can rotate; and during the rotation of the base frame 3, the guide balls 52 continuously compress the limit springs 54, generating resistance to the rotation of the base frame 3, and the base frame 3 slowly stabilizes.

[0047] like Figure 6 and Figure 7 As shown, a plurality of buoyancy blocks 32 are fixedly connected to the outer wall of the receiving bag 31, and a buoyancy frame 6 is fixedly connected to the end wall at the bag opening of the receiving bag 31. The buoyancy frame 6 is detachably connected to the frame wall of the base frame 3 via a detachable member 7. Furthermore, the receiving bag 31 in this embodiment is made of a water-proof material and is provided with a drainage hole 33. In daily life, the drainage hole 33 can drain rainwater and other accumulated water in the receiving bag 31. Furthermore, a sealing member 8 is provided on the side wall of the receiving bag 31 surrounding the drainage hole 33. After the base frame 3 is stabilized, the detachable member 7 is operated to cause the receiving bag 31 to fall, and the buoyancy frame 6 floats on the water surface. Simultaneously, the sealing member 8 blocks the drainage hole 33. The buoyancy frame 6, combined with the receiving bag 31, forms a simple lifeboat, facilitating rescue.

[0048] like Figure 6 and Figure 7As shown, the detachable member 7 includes a connecting post 71, a first wrapping sheet 72, and a second wrapping sheet 73. The connecting post 71 is fixedly connected to the side wall of the buoyancy frame 6 facing away from the receiving bag 31. The connecting post 71 is cylindrical. The first wrapping sheet 72 and the second wrapping sheet 73 are arc-shaped sheets with a central angle of less than 180°. One circumferential end of each of the first wrapping sheet 72 and the second wrapping sheet 73 is rotatably connected to the base frame 3. In this embodiment, the central angle of each of the first wrapping sheet 72 and the second wrapping sheet 73 is 120°. Therefore, after the first wrapping sheet 72 and the second wrapping sheet 73 are attached to the circumferential wall of the connecting post 71, a gap exists between the ends of the first wrapping sheet 72 and the second wrapping sheet 73 away from the rotating end.

[0049] The first and second wrapping sheets 72 and 73 are both fixedly connected to the sidewalls of the same axial end. The fixing plates 74 are also arc-shaped plates. When the first and second wrapping sheets 72 and 73 are in contact with the outer peripheral wall of the connecting column 71, the opposite sidewalls of the two fixing plates 74 are on the same circle. The circle on which the two fixing plates 74 lie is coaxial with the connecting column 71. The arc-shaped outer walls of the two fixing plates 74 are sleeved with a limiting ring 75 and a fixing ring 76. The side of the limiting ring 75 near the first wrapping sheet 72 abuts the sidewall of the base frame 3. The inner wall of the fixing ring 76 is threadedly connected to the fixing plate 74. The fixing ring 76 is located on the side of the limiting ring 75 away from the first wrapping sheet 72 and abuts against the limiting ring 75. Rotate the fixing ring 76 to remove it, and then remove the limiting ring 75. Under the action of gravity, the connecting column 71 can push the first and second wrapping sheets 72 and 73 apart and fall.

[0050] like Figure 8 、 Figure 9 and Figure 10 As shown, the sealing member 8 includes a folded edge 81, which is annular and has one circumferential end fixedly connected to the wall of the drain hole 33. A through-hole 82 is defined within the folded edge 81, to which a connecting piece 84 is fixedly connected. A tensioning rope 85 is fixedly connected to the connecting piece 84. A sliding hole 83 communicating with the through-hole 82 is defined on the side wall of the connecting folded edge 81. The sliding hole 83 is located near the connecting piece 84 and on the side of the connecting piece 84 facing away from the side wall connected to the tensioning rope 85. The free end of the tensioning rope 85 passes through the through-hole 82 and extends out of the sliding hole 83. The receiving bag 31 is provided with a driving member 9 for driving the tensioning rope 85 to slide.

[0051] like Figure 8As shown, the driving member 9 includes a driving rope 91, one end of which is fixedly connected to the end of the tensioning rope 85 extending through the passage 82, and the end of the driving rope 91 away from the tensioning rope 85 is fixedly connected to the inner side wall of the receiving bag 31. Furthermore, when the folded edge 81 is unfolded and does not close the drainage hole 33, in this embodiment, the sum of the length of the tensioning rope 85 extending through the passage 82 and the length of the driving rope 91 is less than the distance along the side wall of the receiving bag 31 between the point where the receiving bag 31 is connected to the driving rope 91 and the sliding hole 83. Therefore, when the folded edge 81 is unfolded, the side wall of the receiving bag 31 opposite the tensioning rope 85 and the driving rope 91 is folded together. When a person falls and causes the receiving bag 31 to unfold, the driving rope 91 pulls the tensioning rope 85, causing the tensioning rope 85 to tighten the folded edge 81, thereby blocking the drainage hole 33 and reducing the ingress of water into the receiving bag 31.

[0052] The implementation principle of the bridge with height-limiting protection function in the embodiment of the present application is as follows: if someone accidentally falls from the bridge body 1, the falling person will first land on the receiving bag 31. As the person falls, the buffer elastic rope 41 will first pull the rope to play a buffering role. Finally, the connecting member 42 will lose its fixing function due to excessive force, and the receiving bag 31 will be unfolded. At the same time, the drainage hole 33 will be blocked by the tightened fold 81. After the falling person lands relatively stably in the receiving bag 31, the force acting on the receiving bag 31 will be transferred to the base frame 3. At this time, the limit spring 54 is compressed, and the guide ball 52 can slide along the guide ring groove 22, allowing the base frame 3 to rotate. Moreover, during the rotation of the base frame 3, the guide ball 52 continuously compresses the limit spring 54, generating resistance to the rotation of the base frame 3, and the base frame 3 slowly stabilizes. Then remove the limiting ring 75 and the fixing ring 76, so that the buoyancy frame 6 falls and floats on the water surface. The buoyancy frame 6 is combined with the receiving bag 31 to form a simple lifeboat, and the fallen person can be rescued at this time.

[0053] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A bridge with height-limiting protection function, comprising a bridge body (1), characterized in that: The bridge body (1) is provided with a support shaft (2), the support shaft (2) is sleeved with a base ring (21), the base ring (21) and the support shaft (2) are rotatably connected, the outer ring wall of the base ring (21) is connected with a base frame (3), and the inner frame wall of the base frame (3) is connected with a receiving bag (31); a buffer positioning component (5) is provided between the base frame (3) and the bridge body (1), and a retracting component (4) is provided on the receiving bag (31), the buffer positioning component (5) includes a guide rod (51), a guide ball (52), a positioning ball (53) and a limit spring (54), a guide ring groove (22) is provided on the outer peripheral wall of the support shaft (2), the guide rod (51) is provided on the base frame (3), and the guide ball (52) is provided at the far end of the guide rod (51). A ball wall of the guide ball (52) fits with the groove wall of the guide ring groove (22) away from one end of the base frame (3); a mounting cavity groove (23) is provided in the support shaft (2); the mounting cavity groove (23) and the guide ring groove (22) are communicated; there are a plurality of mounting cavity grooves (23); a sliding rod (56) is connected to the groove wall of the mounting cavity groove (23) along the radial sliding direction of the support shaft (2); the positioning ball (53) is provided at one end of the sliding rod (56) facing the outside of the support shaft (2); the limit spring (54) is fixedly connected between one end of the sliding rod (56) away from the positioning ball (53) and the groove wall of the mounting cavity groove (23); the guide ball (52) is located between the two positioning balls (53) and abuts against the positioning ball (53).

2. The bridge with height-limiting protection function according to claim 1, characterized in that: The retractable assembly (4) comprises a buffer elastic rope (41) and a connecting piece (42); one end of the buffer elastic rope (41) is fixedly connected to the side wall of the receiving bag (31); the other end of the buffer elastic rope (41) is detachably connected to the receiving bag (31) via the connecting piece (42); the length of the buffer elastic rope (41) is less than the distance along the side wall of the receiving bag (31) between the two points where the receiving bag (31) is connected to the buffer elastic rope (41).

3. The bridge with height-limiting protection function according to claim 1, characterized in that: The receiving bag (31) is provided with a buoyancy block (32).

4. The bridge with height-limiting protection function according to claim 3, characterized in that: A buoyancy frame (6) is provided at the bag opening of the receiving bag (31), and the buoyancy frame (6) is detachably connected to the frame wall of the base frame (3) via a detachable part (7).

5. The bridge with height-limiting protection function according to claim 4, characterized in that: The detachable part (7) includes a connecting column (71), a first wrapping sheet (72) and a second wrapping sheet (73). The connecting column (71) is arranged on the side wall of the buoyancy frame (6) away from the receiving bag (31) and is cylindrical. One end of the first wrapping sheet (72) and the second wrapping sheet (73) are both rotatably connected to the base frame (3). The first wrapping sheet (72) and the second wrapping sheet (73) are both fitted with the circumferential wall of the connecting column (71). The end of the first wrapping sheet (72) away from the base frame (3) and the end of the second wrapping sheet (73) away from the base frame (3) are both located on the side of the center of the connecting column (71) close to the buoyancy frame (6). The first wrapping sheet (72) away from the base frame There is a gap between one end of the first wrapping sheet (72) and one end of the second wrapping sheet (73) away from the base frame (3); a fixing plate (74) is provided on both the first wrapping sheet (72) and the second wrapping sheet (73), and the opposite side walls of the two fixing plates (74) are on the same circle, and the circle where the two fixing plates (74) are located is coaxial with the connecting column (71); a limiting ring (75) and a fixing ring (76) are sleeved on the opposite side walls of the two fixing plates (74), the inner wall of the limiting ring (75) is in contact with the fixing plate (74), the inner wall of the fixing ring (76) is threadedly connected to the fixing plate (74), and the fixing ring (76) is located on the side of the limiting ring (75) away from the first wrapping sheet (72).

6. The bridge with height-limiting protection function according to claim 2, characterized in that: The receiving bag (31) is made of a water-proof material. A drainage hole (33) is provided on the receiving bag (31). A sealing member (8) is provided on the side wall of the receiving bag (31) around the drainage hole (33).

7. The bridge with height-limiting protection function according to claim 6, characterized in that: The hole sealing member (8) includes a folded edge (81), which is fixedly connected to the hole wall of the drainage hole (33), a through hole (82) is provided in the folded edge (81), a sliding hole (83) communicating with the through hole (82) is provided on the side wall of the folded edge (81), a tensioning rope (85) is fixedly connected to the side wall of the through hole (82), the tensioning rope (85) is arranged close to the sliding hole (83), and one end of the tensioning rope (85) away from the end wall connected to the side wall of the through hole (82) extends out of the through hole (82) through the sliding hole (83), and a driving member (9) for driving the tensioning rope (85) to slide is provided on the receiving bag (31).

8. The bridge with height-limiting protection function according to claim 7, characterized in that: The driving member (9) includes a driving rope (91), one end of which is connected to an end of the tensioning rope (85) extending out of the through-hole (82), and an end of the driving rope (91) away from the tensioning rope (85) is fixedly connected to the side wall of the receiving bag (31); the sum of the length of the tensioning rope (85) extending out of the through-hole (82) and the length of the driving rope (91) is less than the distance between the point where the receiving bag (31) is connected to the driving rope (91) and the sliding hole (83) along the side wall of the receiving bag (31).

Images