Reinforcing device for municipal bridge

Abstract

The reinforcing device for the municipal bridge comprises a top supporting plate and a connecting plate, a supporting rod is fixedly connected to the center of the top of the top supporting plate, an elastic steel plate is fixedly connected to the outer surface of the top of the supporting rod, and adjusting plates are rotationally connected to the outer surfaces of two first rotating seats. A plurality of first teeth arranged in a linear array are fixedly connected to the outer surfaces of the opposite sides of the two adjusting plates, an incomplete gear is fixedly connected to the outer surface of the side, close to the adjusting plates, of the rotating shaft, and a first crank is fixedly connected to the end, away from the incomplete gear, of the rotating shaft. According to the embodiment of the invention, the first crank is rotated to drive the rotating shaft to rotate the incomplete gear, the adjusting plate moves downwards in cooperation with the first teeth, the adjusting plate drives one side of the elastic steel plate to move downwards, so that the elastic steel plate is elastically deformed and is in an arched state, and supporting can be carried out according to different shapes of the bottom of the bridge.

Description

Technical Field

[0001] The embodiment of the present application relates to the technical field of bridge reinforcement, and specifically to a reinforcement device for a municipal bridge. Background Art

[0002] Bridge reinforcement means taking certain measures to improve the bearing capacity and performance of components and even the entire structure to meet new requirements. In other words, it is necessary to deal with the situation where the bridge cannot continue to be used. The reasons for reinforcement include poor durability and aging of the bridge, improper design or poor construction quality. After bridge reinforcement, the service life of the bridge can be extended, and with a small amount of capital investment, the bridge can meet the traffic demand. It can also ease the concentration of bridge investment and prevent and avoid the loss of life and property caused by bridge collapse.

[0003] In the prior art, when reinforcing a bridge, a support plate is usually used to support the bottom of the bridge. However, the bottom of the bridge is usually set to a flat state or an arched state. Using a single support plate cannot support the different shapes of the bottom of the bridge, and has great limitations in use.

[0004] Therefore, an embodiment of the present application proposes a reinforcement device for a municipal bridge. Summary of the invention

[0005] In view of the deficiencies in the prior art, an embodiment of the present application provides a reinforcement device for a municipal bridge to solve the problems mentioned in the above background technology.

[0006] To achieve the above objectives, the present application provides the following technical solutions:

[0007] The embodiment of the present application proposes a reinforcement device for municipal bridges, including a top support plate and a connecting plate, wherein a support rod is fixedly connected to the top center of the top support plate, an elastic steel plate is fixedly connected to the top outer surface of the support rod, a first rotating seat is fixedly connected to the left and right ends of the bottom of the elastic steel plate, the outer surfaces of the two first rotating seats are rotatably connected to adjustment plates, a plurality of first teeth arranged in a linear array are fixedly connected to the outer surfaces of the two adjusting plates on opposite sides, the top outer surface of the top support plate is fixedly connected to two vertical plates, the outer surfaces of the two vertical plates are rotatably penetrated by a rotating shaft, an incomplete gear is fixedly connected to the outer surface of the rotating shaft close to the adjusting plate, the outer surface of the incomplete gear is movably meshed with the outer surface of the first teeth, and a first crank is fixedly connected to the end of the rotating shaft away from the incomplete gear.

[0008] As a further explanation of the embodiments of the present application, the top outer surface of the top support plate is fixedly connected to two side plates, the opposite outer surfaces of the two side plates are rotatably connected to support shafts, the opposite outer surface fixing sleeves of the two support shafts are provided with a first gear, the front outer surfaces of the two adjustment plates are fixedly connected to a plurality of second teeth, the first gear is movably engaged with the outer surfaces of the second teeth, the outer surface fixing sleeve of the support shaft is provided with a ratchet, the side of the side plate close to the ratchet is rotatably connected to a pawl, and the pawl is movably engaged with the teeth of the ratchet.

[0009] As a further explanation of the embodiments of the present application, two racks are fixedly connected to the top outer surface of the connecting plate, and the outer surfaces of the two racks are movably sleeved with an adjustment frame, and the inner surface of the adjustment frame is rotatably connected with a transverse axis, and the outer surface of the transverse axis is fixedly sleeved with a worm gear and two second gears, and the two second gears are respectively movably engaged with the outer surfaces of the two racks, and a worm is rotatably penetrated through the front outer surface of the adjustment frame, and the worm is movably engaged with the outer surface of the worm wheel, and the front outer surface of the worm is fixedly connected with a second crank.

[0010] As a further explanation of the embodiment of the present application, it also includes two groups of first arc-shaped hoops, two groups of second arc-shaped hoops and two piers for installing the first arc-shaped hoops and the second arc-shaped hoops, the number of the first arc-shaped hoops and the second arc-shaped hoops in each group is two, the opposite outer surfaces of the two first arc-shaped hoops close to the connecting plate are fixedly connected to the fixing plate, the left and right outer surfaces of the connecting plate are threadedly connected to the threaded rod, and the other end of the threaded rod is rotatably connected to the fixing plate.

[0011] As a further explanation of the embodiments of the present application, the bottom outer surface of the connecting plate is rotatably connected to two second rotating seats, the outer surfaces of the two second rotating seats are rotatably connected to movable rods, the opposite outer surfaces of the two second arc-shaped clamps close to one side of the connecting plate are fixedly connected to third rotating seats, the outer surface of the third rotating seat is rotatably connected to a fixed rod, and the movable rod is movably inserted inside the fixed rod.

[0012] As a further illustration of the embodiment of the present application, a pull ring is fixedly connected to the top outer surfaces of the two pawls.

[0013] As a further illustration of an embodiment of the present application, the top outer surface of the top support plate is fixedly connected to two sliding rods, and the outer surfaces opposite to each other of the two adjustment plates are fixedly connected to sliding blocks, and the sliding blocks are movably mounted on the outer surfaces of the sliding rods.

[0014] As a further explanation of the embodiments of the present application, a mounting plate is fixedly connected to both sides of the two first arc-shaped clamps and the second arc-shaped clamps in the same group, and a plurality of mounting holes are provided on the outer surface of the mounting plate. Bolts are provided inside the mounting holes, and nuts are threadedly connected to the outer surfaces of the bolts.

[0015] As a further illustration of an embodiment of the present application, the outer surfaces of the fixed rod and the movable rod are provided with screw holes, there are several screw holes on the surface of the movable rod and they are arranged in a linear array, and the inner threads of the screw holes corresponding to the fixed rod and the movable rod are connected with an adjusting handwheel.

[0016] As a further illustration of an embodiment of the present application, two limiting plates are fixedly connected to the outer surface of the pier, and four groups of the first arc-shaped hoops and the second arc-shaped hoops are respectively located on the top of the four limiting plates.

[0017] Compared with the prior art, the beneficial effects of the embodiments of the present application are:

[0018] 1. In the embodiment of the present application, by rotating the first crank, the rotating shaft is driven to rotate the incomplete gear, and the first tooth is cooperated to move the adjustment plate downward. The adjustment plate drives one side of the elastic steel plate downward, causing the elastic steel plate to elastically deform, making it in an arched state, so that it can support different shapes of the bottom of the bridge.

[0019] 2. In the embodiment of the present application, by rotating the second crank, the second crank drives the worm to rotate, causing the worm wheel to rotate, driving the horizontal axis to cause the second gear to roll on the surface of the rack, thereby adjusting the overall height of the adjustment frame, so that the elastic steel plate is close to the bottom of the bridge.

[0020] 3. In the embodiment of the present application, the first arc-shaped clamp and the second arc-shaped clamp are fixed to the bridge pier by bolts and nuts in cooperation with a limiting ring, and the positions of the first arc-shaped clamps on both sides are adjusted by threaded rods, thereby improving the versatility of the reinforcement device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of a bridge structure in which the embodiment of the present application is applied to a bridge structure with a flat bottom structure;

[0022] Figure 2 This is a schematic diagram of a bridge structure in which an embodiment of the present application is applied and the bottom thereof is an arched structure;

[0023] Figure 3 This is a schematic diagram of the top support plate and its related structures in an embodiment of the present application;

[0024] Figure 4 For the embodiment of this application Figure 3 The enlarged structural diagram at A in the middle;

[0025] Figure 5For the embodiment of this application Figure 4 The enlarged structural diagram at B in the middle;

[0026] Figure 6 This is a schematic diagram of the internal structure of the adjustment frame of the embodiment of the present application;

[0027] Figure 7 This is a schematic diagram of the connecting plate and its related structures according to an embodiment of the present application.

[0028] In the figure: 1. bridge pier; 2. top support plate; 3. support rod; 4. elastic steel plate; 5. first rotating seat; 6. adjustment plate; 7. first tooth; 8. rotating shaft; 9. incomplete gear; 10. first crank; 11. second tooth; 12. first gear; 13. ratchet; 14. connecting plate; 15. rack; 16. adjusting frame; 17. horizontal axis; 18. worm; 19. worm wheel; 20. second crank; 21. second gear; 22. first arc clamp; 23. threaded rod; 24. fixing plate; 25. second arc clamp; 26. movable rod; 27. fixing rod; 28. ratchet. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the present application.

[0030] Example:

[0031] Please refer to Figure 1-Figure 5 The embodiment of the present application provides a reinforcement device for a municipal bridge, including a top support plate 2 and a connecting plate 14, a support rod 3 is fixedly connected to the top center of the top support plate 2, an elastic steel plate 4 is fixedly connected to the top outer surface of the support rod 3, a first rotating seat 5 is fixedly connected to the left and right ends of the bottom of the elastic steel plate 4, the outer surfaces of the two first rotating seats 5 are rotatably connected to adjustment plates 6, and the outer surfaces of the two adjustment plates 6 are fixedly connected to a plurality of first teeth 7 arranged in a linear array, the top outer surface of the top support plate 2 is fixedly connected to two vertical plates, the outer surfaces of the two vertical plates are rotatably penetrated by a rotating shaft 8, an incomplete gear 9 is fixedly connected to the outer surface of the rotating shaft 8 close to the adjusting plate 6, the outer surface of the incomplete gear 9 is movably meshed with the outer surface of the first teeth 7, and the end of the rotating shaft 8 away from the incomplete gear 9 is fixedly connected to a first crank 10.

[0032] It is understandable that, combined with Figure 4The outer surface of the incomplete gear 9 has partial teeth, and the teeth on the outer surface of the incomplete gear 9 can be movably engaged with the outer surface of the first teeth 7.

[0033] In this embodiment, by rotating the first crank 10, the first crank 10 drives the rotating shaft 8 to rotate the incomplete gear 9, and the incomplete gear 9 engages with the first tooth 7, driving the adjustment plate 6 to move downward, and the adjustment plate 6 rotates between the first rotating seat 5, and the adjustment plate 6 pulls one side of the elastic steel plate 4, causing the elastic steel plate 4 to deform, so that the elastic steel plate 4 appears in an arched state.

[0034] As an implementation method, in this embodiment, please continue to refer to Figure 4 , Figure 5 and Figure 6 The top outer surface of the top support plate 2 is fixedly connected to two side plates, and the opposite outer surfaces of the two side plates are rotatably connected to support shafts. The opposite outer surfaces of the two support shafts are fixedly sleeved with a first gear 12, and the front outer surfaces of the two adjustment plates 6 are fixedly connected to a plurality of second teeth 11, and the first gear 12 is movably engaged with the outer surfaces of the second teeth 11, and the outer surface of the support shaft is fixedly sleeved with a ratchet 28, and a pawl 13 is rotatably connected to the side of the side plate close to the ratchet 28, and the pawl 13 is movably engaged with the teeth of the ratchet 28.

[0035] It can be understood that when the adjustment plate 6 moves downward, it drives the second tooth 11 to move downward, and the second tooth 11 causes the first gear 12 to rotate; with the cooperation of the ratchet 28 and the pawl 13, the first gear 12 is limited to prevent the first gear 12 from rotating in the opposite direction, thereby preventing the second tooth 11 from driving the adjustment plate 6 to move upward under the elastic force of the elastic steel plate 4.

[0036] In this embodiment, the top outer surfaces of the two pawls 13 are fixedly connected with pull rings. Specifically, the pawls 13 are pulled by the pull rings so that the pawls 13 are disengaged from the outer surface of the ratchet 28, thereby releasing the limit of the ratchet 28.

[0037] As an embodiment, two slide bars are fixedly connected to the top outer surface of the top support plate 2, and sliders are fixedly connected to the outer surfaces of the two adjustment plates 6 facing away from each other, and the sliders are movably sleeved on the outer surfaces of the slide bars. When the adjustment plates 6 move downward, the sliders slide on the surfaces of the slide bars, so that the adjustment plates 6 perform stable linear motion.

[0038] In the specific implementation process, the inclination angle of the elastic steel plate 4 can be adjusted according to the bottom shape of different bridges; wherein, the first crank 10 is rotated, the first crank 10 drives the rotating shaft 8 to rotate the incomplete gear 9, the incomplete gear 9 is meshed with the first tooth 7, and drives the adjustment plate 6 to move downward, the adjustment plate 6 rotates between the first rotating seat 5, and the adjustment plate 6 pulls one side of the elastic steel plate 4, so that the elastic steel plate 4 is deformed, so that the elastic steel plate 4 appears in an arched state; wherein, when the adjustment plate 6 moves downward, it drives the second tooth 11 to move downward, the second tooth 11 rotates the first gear 12, and under the cooperation of the ratchet 28 and the pawl 13, the first gear 12 is limited to prevent the first gear 12 from rotating in the opposite direction, thereby preventing the second tooth 11 from driving the adjustment plate 6 to move upward under the elastic force of the elastic steel plate 4. When it is necessary to reset the elastic steel plate 4, pull the pawl 13 so that the pawl 13 is disengaged from the teeth of the ratchet 28.

[0039] Please refer to Figure 1 , Figure 2 and Figure 6 The top outer surface of the connecting plate 14 is fixedly connected to two racks 15, the outer surfaces of the two racks 15 are movably sleeved with an adjusting frame 16, the inner surface of the adjusting frame 16 is rotatably connected with a transverse shaft 17, the outer surface of the transverse shaft 17 is fixedly sleeved with a worm gear 19 and two second gears 21, the two second gears 21 are movably engaged with the outer surfaces of the two racks 15 respectively, a worm 18 is rotatably penetrated through the front outer surface of the adjusting frame 16, the worm 18 is movably engaged with the outer surface of the worm wheel 19, and the front outer surface of the worm 18 is fixedly connected with a second crank 20.

[0040] During the specific implementation process, after the connecting plate 14 is fixed, the second crank 20 is rotated, the second crank 20 drives the worm 18 to rotate, the worm 18 drives the worm wheel 19 to rotate, so that the horizontal axis 17 rotates, the horizontal axis 17 drives the second gear 21 to rotate, and the second gear 21 rolls upward on the surface of the tooth plate, so that the adjustment frame 16 moves upward as a whole until the elastic steel plate 4 contacts the bottom surface of the bridge to support it; and the horizontal axis 17 is locked and limited by the self-locking property between the worm 18 and the worm wheel 19.

[0041] Please refer to Figure 1 , Figure 2 and Figure 7The reinforcement device further includes two groups of first arc-shaped hoops 22, two groups of second arc-shaped hoops 25, and two bridge piers 1 for installing the first arc-shaped hoops 22 and the second arc-shaped hoops 25. Each group of the first arc-shaped hoops 22 and the second arc-shaped hoops 25 has two first arc-shaped hoops 22 and two arc-shaped hoops 25. The two first arc-shaped hoops 22 on the side close to the connecting plate 14 are fixedly connected to the opposite outer surfaces thereof with the fixing plate 24. The outer surfaces of the left and right sides of the connecting plate 14 are both threadedly connected with the threaded rods 23, and the other ends of the threaded rods 23 are rotatably connected to the fixing plate 24. Specifically, according to the distance between the two bridge piers 1, the threaded rods 23 are rotated so that the distance between different groups of the first arc-shaped hoops 22 changes.

[0042] In this embodiment, both sides of the two first arc-shaped clamps 22 and the second arc-shaped clamps 25 in the same group are fixedly connected with a mounting plate, and a plurality of mounting holes are provided on the outer surface of the mounting plate, and bolts are provided inside the mounting holes, and nuts are threadedly connected to the outer surfaces of the bolts. Specifically, the first arc-shaped clamps 22 and the second arc-shaped clamps 25 in the same group are connected by screwing the bolts into the corresponding mounting holes and then screwing the nuts onto the bolts.

[0043] Please continue reading Figure 1 and Figure 2 In this embodiment, the outer surface of the bottom of the connecting plate 14 is rotatably connected to two second rotating seats, and the outer surfaces of the two second rotating seats are both rotatably connected to the movable rod 26. The outer surfaces of the two second arc-shaped clamps 25 on the side of the connecting plate 14 are both fixedly connected to the third rotating seat, and the outer surface of the third rotating seat is rotatably connected to the fixed rod 27, and the movable rod 26 is movably inserted inside the fixed rod 27. Specifically, by adjusting the position of the movable rod 26 inside the fixed rod 27, and making the movable rod 26 and the fixed rod 27 rotate between the second rotating seat and the third rotating seat respectively, until the second arc-shaped clamp 25 is located at the top of another limiting ring, the bottom of the connecting plate 14 is supported by the movable rod 26 and the fixed rod 27.

[0044] As an implementation mode, screw holes are provided on the outer surfaces of the fixed rod 27 and the movable rod 26. There are several screw holes on the surface of the movable rod 26 and they are arranged in a linear array. The screw holes corresponding to the fixed rod 27 and the movable rod 26 are threadedly connected with an adjusting hand wheel. When it is necessary to release the limit of the fixed rod 27 and the movable rod 26, the adjusting hand wheel is screwed down to adjust the length between the fixed rod 27 and the movable rod 26. When the screw holes between the fixed rod 27 and the movable rod 26 correspond, the adjusting hand wheel is screwed in to limit the fixed rod 27 and the movable rod 26.

[0045] In this embodiment, two limiting plates are fixedly connected to the outer surface of the pier 1, and four groups of first arc-shaped hoops 22 and second arc-shaped hoops 25 are respectively located on the top of the four limiting plates. In this embodiment, the first arc-shaped hoops 22 and second arc-shaped hoops 25 are supported by the limiting plates to prevent the first arc-shaped hoops 22 and second arc-shaped hoops 25 from detaching from the pier 1.

[0046] Based on the above structure, in the specific implementation process, when fixing the connecting plate 14, the limiting ring is first fixedly connected to the pier 1, and then multiple groups of first arc-shaped hoops 22 and second arc-shaped hoops 25 are fixed on the top of the limiting ring of the pier 1; at this time, the first arc-shaped hoops 22 of the same group correspond to each other, and the two first arc-shaped hoops 22 of the same group are connected by bolts and nuts, and the threaded rod 23 is rotated according to the distance between the two piers 1, so that the distance between different groups of first arc-shaped hoops 22 changes; then the limit between the movable rod 26 and the fixed rod 27 is released, the position of the movable rod 26 inside the fixed rod 27 is adjusted, and the movable rod 26 and the fixed rod 27 are respectively rotated between the second rotating seat and the third rotating seat until the second arc-shaped hoop 25 is located at the top of another limiting ring; the bottom of the connecting plate 14 is supported by the movable rod 26 and the fixed rod 27, and then the second arc-shaped hoop 25 is installed, and the installation method of the second arc-shaped hoop 25 is the same as that of the first arc-shaped hoop 22.

[0047] In summary, when the embodiment of the present application is in use, the inclination angle of the elastic steel plate 4 is adjusted according to the bottom shape of different bridges; at this time, the first crank 10 is rotated, and the first crank 10 drives the rotating shaft 8 to rotate the incomplete gear 9, and the incomplete gear 9 is meshed with the first tooth 7, driving the adjustment plate 6 to move downward, and the adjustment plate 6 rotates between the first rotating seat 5, and the adjustment plate 6 pulls one side of the elastic steel plate 4, so that the elastic steel plate 4 is deformed, so that the elastic steel plate 4 appears in an arched state; wherein, when the adjustment plate 6 moves downward, it drives the second tooth 11 to move downward, and the second tooth 11 causes the first gear 12 to rotate, and under the cooperation of the ratchet 28 and the pawl 13, the first gear 12 is limited to prevent the first gear 12 from rotating in the opposite direction, thereby preventing the second tooth 11 from driving the adjustment plate 6 to move upward under the elastic force of the elastic steel plate 4; when it is necessary to reset the elastic steel plate 4, the pawl 13 is pulled to disengage the pawl 13 from the teeth of the ratchet 28.

[0048] It can be understood that after the connecting plate 14 is fixed, by rotating the second crank 20, the second crank 20 drives the worm 18 to rotate, and the worm 18 drives the worm wheel 19 to rotate, so that the horizontal axis 17 rotates, and the horizontal axis 17 drives the second gear 21 to rotate. The second gear 21 rolls upward on the surface of the tooth plate, so that the adjustment frame 16 moves upward as a whole until the elastic steel plate 4 contacts the bottom surface of the bridge to support it, and the horizontal axis 17 is locked and limited by the self-locking property between the worm 18 and the worm wheel 19.

[0049] When fixing the connecting plate 14, firstly weld the limiting ring to the pier 1, and then fix multiple groups of first arc-shaped clamps 22 and second arc-shaped clamps 25 on the top of the limiting ring of the pier 1. At this time, the first arc-shaped clamps 22 of the same group correspond to each other, and the two first arc-shaped clamps 22 of the same group are connected by bolts and nuts. According to the distance between the two piers 1, the threaded rod 23 is rotated to change the distance between different groups of first arc-shaped clamps 22, and then the limit between the movable rod 26 and the fixed rod 27 is released; the position of the movable rod 26 inside the fixed rod 27 is adjusted, and the movable rod 26 and the fixed rod 27 are rotated between the second rotating seat and the third rotating seat respectively until the second arc-shaped clamp 25 is located at the top of another limiting ring; the bottom of the connecting plate 14 is supported by the movable rod 26 and the fixed rod 27, and then the second arc-shaped clamp 25 is installed. The installation method of the second arc-shaped clamp 25 is the same as that of the first arc-shaped clamp 22.

[0050] Although embodiments of the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the embodiments of the present application, and the scope of the embodiments of the present application is defined by the appended claims and their equivalents.

Claims

1. A reinforcement device for municipal bridges, characterized in that: It comprises a top support plate (2) and a connecting plate (14), wherein a support rod (3) is fixedly connected to the top center of the top support plate (2), an elastic steel plate (4) is fixedly connected to the top outer surface of the support rod (3), a first rotating seat (5) is fixedly connected to the left and right ends of the bottom of the elastic steel plate (4), the outer surfaces of the two first rotating seats (5) are both rotatably connected to adjustment plates (6), and a plurality of first teeth (7) arranged in a linear array are fixedly connected to the outer surfaces of the two adjustment plates (6) on the opposite sides; The top outer surface of the top support plate (2) is fixedly connected to two vertical plates, and a rotating shaft (8) is rotatably passed through the outer surfaces of the two vertical plates. An incomplete gear (9) is fixedly connected to the outer surface of the rotating shaft (8) on one side close to the adjustment plate (6), and the outer surface of the incomplete gear (9) is movably meshed with the outer surface of the first tooth (7). The end of the rotating shaft (8) away from the incomplete gear (9) is fixedly connected to the first crank (10).

2. The reinforcement device for municipal bridges according to claim 1, characterized in that: The top outer surface of the top support plate (2) is fixedly connected to two side plates, and the opposite outer surfaces of the two side plates are rotatably connected to support shafts. The opposite outer surfaces of the two support shafts are fixedly sleeved with a first gear (12), and the front outer surfaces of the two adjustment plates (6) are fixedly connected to a plurality of second teeth (11), and the first gear (12) is movably meshed with the outer surfaces of the second teeth (11). The outer surface fixed sleeve of the support shaft is provided with a ratchet (28), and the side of the side plate close to the ratchet (28) is rotatably connected to a pawl (13), and the pawl (13) is movably meshed with the teeth of the ratchet (28).

3. The reinforcement device for municipal bridges according to claim 1, characterized in that: The top outer surface of the connecting plate (14) is fixedly connected to two racks (15); the outer surfaces of the two racks (15) are movably sleeved with an adjustment frame (16); the inner surface of the adjustment frame (16) is rotatably connected to a transverse shaft (17); the outer surface of the transverse shaft (17) is fixedly sleeved with a worm gear (19) and two second gears (21); the two second gears (21) are movably meshed with the outer surfaces of the two racks (15), respectively; a worm (18) is rotatably penetrated through the front outer surface of the adjustment frame (16); the worm (18) is movably meshed with the outer surface of the worm gear (19); and the front outer surface of the worm (18) is fixedly connected to a second crank (20).

4. The reinforcement device for municipal bridges according to claim 1, characterized in that: It also comprises two groups of first arc-shaped hoops (22), two groups of second arc-shaped hoops (25) and two bridge piers (1) for mounting the first arc-shaped hoops (22) and the second arc-shaped hoops (25), wherein each group of the first arc-shaped hoops (22) and the second arc-shaped hoops (25) comprises two first arc-shaped hoops (22) and two second arc-shaped hoops (25), and the opposite outer surfaces of the two first arc-shaped hoops (22) on the side close to the connecting plate (14) are fixedly connected to a fixing plate (24), and the outer surfaces on the left and right sides of the connecting plate (14) are threadedly connected to a threaded rod (23), and the other end of the threaded rod (23) is rotatably connected to the fixing plate (24).

5. The reinforcement device for municipal bridges according to claim 1, characterized in that: The bottom outer surface of the connecting plate (14) is rotatably connected to two second rotating seats, and the outer surfaces of the two second rotating seats are both rotatably connected to movable rods (26). The opposite outer surfaces of the two second arc-shaped clamps (25) on one side close to the connecting plate (14) are both fixedly connected to third rotating seats, and the outer surface of the third rotating seat is rotatably connected to a fixed rod (27), and the movable rod (26) is movably inserted inside the fixed rod (27).

6. The reinforcement device for municipal bridges according to claim 2, characterized in that: The top outer surfaces of the two ratchet claws (13) are both fixedly connected with pull rings.

7. The reinforcement device for municipal bridges according to claim 1, characterized in that: The top outer surface of the top support plate (2) is fixedly connected to two sliding rods, and the outer surfaces of the two adjustment plates (6) facing away from each other are fixedly connected to sliding blocks, which are movably sleeved on the outer surfaces of the sliding rods.

8. The reinforcement device for municipal bridges according to claim 4, characterized in that: Both sides of the first arc-shaped clamp (22) and the second arc-shaped clamp (25) of the same group are fixedly connected with a mounting plate, the outer surface of the mounting plate is provided with a plurality of mounting holes, the inside of the mounting holes is provided with bolts, and the outer surface of the bolts is threadedly connected with nuts.

9. The reinforcement device for municipal bridges according to claim 5, characterized in that: The outer surfaces of the fixed rod (27) and the movable rod (26) are both provided with screw holes. The movable rod (26) has a plurality of screw holes on its surface arranged in a linear array. The screw holes corresponding to the fixed rod (27) and the movable rod (26) are threadedly connected with an adjusting hand wheel.

10. The reinforcement device for municipal bridges according to claim 4, characterized in that: Two limiting plates are fixedly connected to the outer surface of the pier (1), and four groups of the first arc-shaped hoops (22) and the second arc-shaped hoops (25) are respectively located on the top of the four limiting plates.

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