Fabricated bridge damping device

Abstract

The invention discloses an assembly type bridge damping device, and belongs to the field of bridge damping devices, the assembly type bridge damping device comprises a bridge pier and a bridge floor body, the bridge floor body is fixed on the tops of a plurality of bridge pier columns, the assembly type bridge damping device further comprises a base, a height adjusting part, a contact part and a buffer part, the buffer part is arranged in the height adjusting part, and the contact part is arranged on the top of the height adjusting part; the buffering piece abuts against the side wall of the pier. The device can adapt to bridge floors with different heights through the arranged height adjusting piece, and after the height is set, the height adjusting piece and the buffer piece are matched with the bridge pier and the bridge floors through connection of the base when an earthquake occurs. Vibration transmitted to the bridge pier and the bridge floor body can be buffered and relieved by the damping device, the influence of vibration on a bridge is reduced, and the service life of the bridge is prolonged. And meanwhile, the device is of an assembly type design and can adapt to bridges of different specifications through adjustment, damping use of the different bridges is met, and the applicability of the device is improved.

Description

Technical Field

[0001] This invention relates to the field of bridge vibration reduction, and more specifically, to a prefabricated bridge vibration reduction device. Background Technology

[0002] Bridges are typically built over rivers, lakes, and seas to facilitate the passage of pedestrians and vehicles. Bridges generally consist of a deck and piers. The piers provide support for the deck. During daily use, bridges support various heavy vehicles, requiring high stability. When an earthquake occurs, the vibrations are transmitted to the piers and then from the piers to the deck; the strong vibrations can damage the bridge structure. To mitigate the impact of earthquakes, it is usually necessary to increase the strength of bridges and improve their seismic performance. However, such reinforcement methods are only suitable for bridges that have not yet begun construction, and increasing strength requires increasing production costs. For bridges that have already been built, their structure is fixed, and reinforcement can only be achieved through external structures. However, most existing reinforcement devices only strengthen the supports; the devices themselves do not have the ability to absorb and dampen vibrations, and cannot effectively buffer the vibrations transmitted to the bridge. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the present invention provides a prefabricated bridge vibration damping device, which can buffer the vibration transmitted to the bridge during an earthquake through its own damping structure, thereby reducing the impact of the earthquake on the bridge.

[0004] To achieve this objective, the present invention adopts the following technical solution: The present invention provides a prefabricated bridge vibration damping device, including a bridge pier and a bridge deck. The bridge deck is fixed to the top of multiple bridge pier columns. The device also includes a base, a height adjustment component, a contact component, and a buffer component. The buffer component is disposed inside the height adjustment component, the contact component is disposed on the top of the height adjustment component, and the buffer component abuts against the side wall of the bridge pier.

[0005] In a preferred embodiment of the present invention, the base comprises a first seat, a second seat, a limiting rod, and a retaining seat; the first seat and the second seat are both semi-circular ring seats of the same shape, the two limiting rods are both connected to the side wall of the first seat, the second seat has a through hole, the second seat is slidably connected to the limiting rod, the limiting rod passes through the through hole, and the retaining seat is slidably connected to the limiting rod.

[0006] In a preferred embodiment of the present invention, the height adjustment component consists of two semi-circular support cylinders, which are respectively disposed on the first seat and the second seat. Each semi-circular support cylinder consists of an arc-shaped plate and an arc-shaped cover. The arc-shaped cover is fitted onto the arc-shaped plate. A first locking strip is provided on the back of the arc-shaped plate from top to bottom. The top of the first locking strip is horizontally positioned. A second locking strip is provided on the inner side of the arc-shaped cover. The first locking strip and the second locking strip are engaged.

[0007] In a preferred embodiment of the present invention, a plurality of first insertion slots are vertically formed on the inner side of the arc-shaped plate, and a plurality of second insertion slots are vertically formed on the inner side of the arc-shaped cover. Both the first insertion slots and the second insertion slots are T-shaped. The buffer member is inserted into both the first insertion slots and the second insertion slots. The buffer member includes a buffer arm and a buffer block, which are spaced apart.

[0008] In a preferred embodiment of the present invention, the buffer arm includes a slide block, a first contact block, a spring, a hydraulic buffer, and a compression block; the slide block includes a sliding portion and a connecting portion, the sliding portion and the connecting portion are hollow inside, and the connecting portion is vertically connected to the middle of the sliding portion and communicates with the sliding portion; the first contact block is fixed to one end of the hydraulic buffer, the compression block is fixed to the other end of the hydraulic buffer, the hydraulic buffer is inserted into the connecting portion, and the compression block extends into the sliding portion; the spring is sleeved outside the hydraulic buffer, and one end of the spring abuts against the first contact block, and the other end of the spring abuts against the connecting portion.

[0009] In a preferred embodiment of the present invention, two top blocks are provided inside the sliding part, and the end of the extrusion block is configured as a frustoconical shape. The two top blocks are respectively located at the upper and lower ends of the extrusion block. A first inclined surface is provided at the end of the top block near the extrusion block, and the end of the extrusion block is in contact with the first inclined surface of the top block. The buffer block is hollow inside, and the top and bottom of the buffer block are connected. A compression ball is provided inside the buffer block, and a protrusion is provided at the end of the top block, extending into the buffer block.

[0010] In a preferred embodiment of the present invention, an outer support member is further included for supporting the height adjustment member. Two outer support members are respectively disposed on both sides of the height adjustment member and are connected to each other. The outer support member includes a fixing ring, a support arm, and a fixing seat. The fixing ring is a semi-circular ring, and a locking block is provided on the inner side of the fixing ring. The locking block is adapted to the first locking strip, and a buffer pad is fixed on the top of the fixing ring. The support arm includes a sleeve, a support rod, and a buffer airbag. The buffer airbag is disposed in the sleeve, and the support rod is inserted into the sleeve and abuts against the buffer airbag. A buffer cavity is opened in the sleeve and is located on one side of the buffer airbag. A pressure groove is opened in the fixing seat and communicates with the bottom of the fixing seat. A first inclined push block is vertically slidably connected to the bottom of the pressure groove. A pin is provided at the bottom of the first inclined push block. A second inclined push block is horizontally slidably connected in the pressure groove. The inclined surface of the first inclined push block contacts the inclined surface of the second inclined push block. The support rod is rotatably connected to the fixing ring, and the sleeve is rotatably connected to the second inclined push block.

[0011] In a preferred embodiment of the present invention, the contact element includes multiple adjusting blocks, and an extension plate is fixed to the top of the arc-shaped cover, with the multiple adjusting blocks fixed to the extension plate; the adjusting block includes a second contact block, a fixing pin, a pushing block, and a mounting base; the mounting base has a sliding groove, and two second contact blocks are slidably connected to the sliding groove, each second contact block is provided with multiple fixing pins, the pushing block is slidably connected to the sliding groove, and the pushing block is located between the two second contact blocks, with a rubber abutment fixed to the end of the second contact block away from the pushing block.

[0012] In a preferred embodiment of the present invention, the push block includes an adjusting seat and an adjusting shaft; a one-way bearing is fixed in the middle of the adjusting seat, and fixed plates are fixed on both sides of the adjusting seat; the adjusting shaft passes through the one-way bearing and is fixedly connected to the inner ring of the one-way bearing; sleeve holes are opened at both ends of the adjusting shaft, and a helical rod is inserted into each sleeve hole; the helical rod passes through the adjacent fixed plate and is threadedly engaged with the fixed plate; one end of the helical rod is tapered, and the other end of the helical rod is splinedly engaged with the sleeve hole; a slot is opened on one side of the second contact block, and multiple channels are opened on the top of the second contact block; a fixing pin is provided in each channel, and the helical rod is inserted into the slot.

[0013] The beneficial effects of this invention are as follows: This invention provides a prefabricated bridge vibration damping device. Through a height adjustment mechanism, the device can be adapted to bridge decks of different heights. After the height is set, the height adjustment mechanism and buffer components are connected via a base to fit the bridge piers and deck. During an earthquake, the vibrations transmitted to the bridge piers and deck can be buffered and mitigated by the damping device, reducing the impact of vibrations on the bridge and extending its service life. Furthermore, this device is a prefabricated design, which can be adjusted to adapt to bridges of different specifications, meeting the vibration damping needs of various bridges and improving the device's applicability. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of a prefabricated bridge vibration damping device provided in a specific embodiment of the present invention; Figure 2 yes Figure 1 Top view of the central base structure; Figure 3 yes Figure 1 Top view of the expansion board structure; Figure 4 yes Figure 1 Enlarged structural diagram at point A in the middle; Figure 5 yes Figure 1 Enlarged structural diagram at point B; Figure 6 yes Figure 1 Enlarged structural diagram at point C; Figure 7 yes Figure 1 Enlarged structural diagram at point D; Figure 8 yes Figure 1 Enlarged structural diagram at point E in the middle.

[0015] In the picture: 1. Bridge deck; 2. Pier; 31. First pier; 32. Second pier; 33. Limiting rod; 34. Card holder; 41. Arc-shaped cover; 42. First locking strip; 43. Arc-shaped plate; 44. Second locking strip; 45. Second insertion slot; 46. First insertion slot; 51. Sliding part; 52. Connecting part; 53. Extrusion block; 54. Hydraulic buffer; 55. Spring; 56. First contact block; 57. Top block; 58. Protrusion; 59. Buffer block; 50. Compression ball; 6. 1. Fixing ring; 62. Clamping block; 63. Support rod; 64. Sleeve; 65. Fixing seat; 66. Second inclined push block; 67. First inclined push block; 68. Insert pin; 69. Pressure groove; 60. Buffer airbag; 601. Buffer chamber; 71. Expansion plate; 72. Mounting seat; 73. Slide groove; 74. Second contact block; 75. Rubber abutment; 76. Fixing pin; 77. Adjusting seat; 78. Adjusting shaft; 79. Helical rod; 70. Fixing plate; 701. One-way bearing. Detailed Implementation

[0016] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] like Figure 1-8 As shown, this embodiment provides a prefabricated bridge vibration damping device, including piers 2 and a bridge deck 1. The bridge deck 1 is fixed to the top of multiple piers 2. It also includes a base, a height adjustment component, a contact component, and a buffer component. The buffer component is disposed within the height adjustment component, the contact component is disposed on the top of the height adjustment component, and the buffer component abuts against the side wall of the piers 2. The piers 2 provide support for the bridge deck 1, allowing pedestrians and vehicles to pass through. The base provides overall support for the device, and the height adjustment component can be adjusted according to different bridge heights to adapt the device to the bridge. After the height adjustment component is adjusted according to the actual dimensions of the bridge, the buffer component is inserted into it, ensuring a tight fit between the buffer component and the bridge. When external vibrations occur, the vibrations transmitted to the piers 2 and the bridge deck 1 can be mitigated by the buffer component, reducing the impact of vibrations on the bridge and improving its lifespan. During normal bridge use, when heavy vehicles pass over the bridge deck 1, the device can also buffer the bridge vibrations caused by the vehicles. This device adopts a prefabricated structure, which can be prefabricated and installed on existing bridges, and can be adapted to bridges of different sizes, making it highly applicable.

[0018] Furthermore, the base consists of a first seat 31, a second seat 32, a limiting rod 33, and a retaining seat 34. Both the first seat 31 and the second seat 32 are identical semi-circular ring seats. Both limiting rods 33 are connected to the side wall of the first seat 31. The second seat 32 has a through hole and is slidably connected to the limiting rod 33, which passes through the through hole. The retaining seat 34 is slidably connected to the limiting rod 33. During installation, the shock absorber aligns the first seat 31 with the second seat 32, and the limiting rod 33 passes through to connect the second seat 32 together. The retaining seat 34 is then secured to the limiting rod 33, thus fixing the first seat 31 and the second seat 32 together and connecting the components on the first seat 31 and the second seat 32.

[0019] Furthermore, the height adjustment component consists of two semi-circular support cylinders, which are respectively mounted on the first seat 31 and the second seat 32. Each semi-circular support cylinder is composed of an arc-shaped plate 43 and an arc-shaped cover 41. The arc-shaped cover 41 is fitted onto the arc-shaped plate 43. A first locking strip 42 is provided from top to bottom on the back of the arc-shaped plate 43, with the top of the first locking strip 42 being horizontal. A second locking strip 44 is provided on the inner side of the arc-shaped cover 41, and the first locking strip 42 and the second locking strip 44 are engaged. The arc-shaped plate 43 surrounds the pier 2, and the height of the arc-shaped cover 41 fitted onto the arc-shaped plate 43 is also adjusted synchronously according to the height of the pier 2. After the height is adjusted, the second locking strip 44 inside the arc-shaped cover 41 engages with the first locking strip 42, fixing the height of the arc-shaped cover 41 in place.

[0020] Furthermore, the inner side of the arc-shaped plate 43 is vertically provided with multiple first insertion slots 46, and the inner side of the arc-shaped cover 41 is vertically provided with multiple second insertion slots 45. Both the first insertion slots 46 and the second insertion slots 45 are T-shaped. Buffer components are inserted into both the first insertion slots 46 and the second insertion slots 45. The buffer components include buffer arms and buffer blocks 59, which are spaced apart. The insertion slots inside the arc-shaped plate 43 and the arc-shaped cover 41 provide connections for the buffer components. The buffer arms and buffer blocks 59 are positioned according to the height of the exposed first insertion slots 46, and the buffer arms press against the pier 2. Vibrations on the pier 2 are transmitted to the buffer arms, which then transmit the vibrations to the buffer blocks 59 for damping and cushioning. The insertion slots allow the buffer arms and buffer blocks 59 to slide in, and the spaced intervals between them ensure that buffer arms are adjacent to buffer blocks 59 to buffer the transmitted vibrations.

[0021] Furthermore, the buffer arm includes a slide block, a first contact block 56, a spring 55, a hydraulic buffer 54, and a pressing block 533; the slide block includes a sliding part 51 and a connecting part 52, the sliding part 51 and the connecting part 52 are hollow inside, and the connecting part 52 is vertically connected to the middle part of the sliding part 51 and communicates with the sliding part 51; the first contact block 56 is fixed to one end of the hydraulic buffer 54, the pressing block 533 is fixed to the other end of the hydraulic buffer 54, the hydraulic buffer 54 is inserted into the connecting part 52, and the pressing block 533 extends into the sliding part 51; the spring 55 is sleeved on the outside of the hydraulic buffer 54, and one end of the spring 55 abuts against the first contact block 56, and the other end of the spring 55 abuts against the connecting part 52.

[0022] The sliding part 51 in the slide block slides within the insertion slot, while the connecting part 52 extends out of the insertion slot. By adjusting the hydraulic damper 54, the first contact block 56 is pressed against the surface of the pier 2. When vibration occurs, the vibration of the bridge is transmitted to the first contact block 56 through the pier 2, and the hydraulic damper 54 connected to the first contact block 56 provides initial buffering. At the same time, the spring 55 also compresses synchronously to buffer the vibration. When both have buffered the vibration, but it has not been completely dissipated, the pressing damper, along with the compression block 533, presses towards the sliding part 51, and the compression block 533 continues to transmit pressure inward.

[0023] Furthermore, the sliding part 51 is provided with two top blocks 57, the end of the extrusion block 533 is configured as a frustoconical shape, the two top blocks 57 are respectively located at the upper and lower ends of the extrusion block 533, the top block 57 is provided with a first inclined surface at the end near the extrusion block 533, and the end of the extrusion block 533 is in contact with the first inclined surface of the top block 57; the buffer block 59 is hollow inside, and the top and bottom of the buffer block 59 are connected, the buffer block 59 is provided with a compression ball 50, the end of the top block 57 is provided with a protrusion 58, and the protrusion 58 extends into the buffer block 59.

[0024] The compression block 533 is pushed outward by the hydraulic buffer 54. At this time, the frustoconical end of the compression block 533 pushes the upper and lower top blocks 57 in two directions. The top blocks 57 then move, and the protrusions 58 on the top blocks 57 extend into the buffer block 59 and press against the compression ball 50. The rubber compression ball 50 is compressed and deformed, thereby buffering the force transmitted from the top block 57 and achieving the effect of shock absorption. The multiple buffer blocks 59 arranged from top to bottom cooperate with the buffer arm to achieve overall shock absorption of the bridge pier 2.

[0025] Furthermore, it also includes external support members for supporting the height adjustment component. Two external support members are respectively disposed on both sides of the height adjustment component and are connected to each other. The external support members include a fixing ring 61, a support arm, and a fixing seat 65. The fixing ring 61 is a semi-circular ring, and a locking block 62 is provided on the inner side of the fixing ring 61. The locking block 62 is adapted to the first locking strip 42, and a buffer pad is fixed on the top of the fixing ring 61. The support arm includes a sleeve 64, a support rod 63, and a buffer airbag 60. The buffer airbag 60 is disposed in the sleeve 64, and the support rod 63 is inserted into the sleeve 64 and the support rod 64 is also disposed in the sleeve 64. 3. The sleeve 64 is in contact with the airbag 60. A buffer cavity 601 is provided inside the sleeve 64. The buffer cavity 601 is located on one side of the airbag 60. A pressure groove 69 is provided inside the fixed seat 65. The pressure groove 69 is connected to the bottom of the fixed seat 65. A first inclined push block 67 is vertically slidably connected to the bottom of the pressure groove 69. A pin 68 is provided at the bottom of the first inclined push block 67. A second inclined push block 66 is horizontally slidably connected inside the pressure groove 69. The inclined surface of the first inclined push block 67 is in contact with the inclined surface of the second inclined push block 66. The support rod 63 is rotatably connected to the fixed ring 61. The sleeve 64 is rotatably connected to the second inclined push block 66.

[0026] The retaining ring 61 is engaged with the first retaining strip 42, and the top of the retaining ring 61 supports the arc-shaped cover 41, providing it with support. When vibration is transmitted from the top, the retaining ring 61 presses down on the support rod 63, and the support rod 63 is forced to compress the buffer airbag 60 in the buffer cavity 601. The buffer airbag 60 deforms under the pressure of compression within the buffer cavity 601, thereby mitigating some of the vibration. At the same time, the sleeve 64 continues to press down, moving the first inclined push block 67 and pressing down on the second inclined push block 66. The bottom pin 68 of the compressed second inclined push block 66 is driven into the ground, transmitting the vibration to the ground on one hand, and making the connection between the outer support and the ground tighter on the other hand, preventing the support from shifting and losing support during vibration.

[0027] Furthermore, the contact element includes multiple adjusting blocks. An extension plate 71 is fixed to the top of the arc-shaped cover 41, and multiple adjusting blocks are fixed to the extension plate 71. Each adjusting block includes a second contact block 74, a fixing pin 76, a push block, and a mounting base 72. The mounting base 72 has a sliding groove 73, and two second contact blocks 74 are slidably connected to the sliding groove 73. Each second contact block 74 is provided with multiple fixing pins 76. The push block is slidably connected to the sliding groove 73 and is located between the two second contact blocks 74. A rubber abutment 75 is fixed to the end of the second contact block 74 away from the push block. The adjusting block is connected to the bottom of the bridge deck 1, allowing vibrations on the bridge deck 1 to be transmitted to the device for shock absorption. During connection, the second contact block 74 abuts against the bottom of the bridge deck 1, and the rubber abutment 75 at the end of the second contact block 74 also presses against the edge of the sliding groove 73. The fixing pins 76 on the second contact block 74 are driven into the bottom of the bridge deck 1, achieving a more stable connection. It can transmit the vibration of the bridge deck 1 downwards to the device for vibration damping.

[0028] Furthermore, the push block includes an adjusting seat 77 and an adjusting shaft 78; a one-way bearing 701 is fixed in the middle of the adjusting seat 77, and fixing plates 70 are fixed on both sides of the adjusting seat 77. The adjusting shaft 78 passes through the one-way bearing 701 and is fixedly connected to the inner ring of the one-way bearing 701. Both ends of the adjusting shaft 78 are provided with sleeve holes, and a spiral rod 79 is inserted into each sleeve hole. The spiral rod 79 passes through the adjacent fixing plate 70 and is threadedly engaged with the fixing plate 70. One end of the spiral rod 79 is tapered, and the other end of the spiral rod 79 is splinedly engaged with the sleeve hole. A slot is provided on one side of the second contact block 74, and multiple channels are provided on the top of the second contact block 74. A fixing pin 76 is provided in each channel, and the spiral rod 79 is inserted into the slot.

[0029] When fixing the second contact block 74, the adjusting shaft 78 is rotated, which drives the spiral rods 79 on both sides to rotate. The rotating spiral rods 79 then extend outward into the slot under the threaded engagement of the fixing plate 70. As the spiral rods 79 enter the slot, they gradually push the fixing pins 76 in the channel outward, causing the fixing pins 76 to embed into the bottom of the bridge deck 1, thus achieving fixation. The one-way bearing 701 prevents the spiral rods 79 from reversing and loosening their support for the fixing pins 76, allowing the fixing pins 76 to be tightly inserted into the bridge deck 1, achieving a tight connection between the bridge deck 1 and the bridge deck 1. Vibrations transmitted from the bridge deck 1 can be mitigated by the contact components, improving the overall shock resistance of the device.

[0030] Other techniques in this embodiment are based on existing technologies.

[0031] This invention has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. This invention is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims are also within the protection scope of this invention.

Claims

1. An assembled bridge damping device, comprising a bridge pier (2) and a bridge deck (1), the bridge deck (1) being fixed on the top of a plurality of bridge pier (2) columns, characterized in that: It also includes a base, a height adjusting piece, a contact piece and a buffer piece, the buffer piece is arranged in the height adjusting piece, the contact piece is arranged on the top of the height adjusting piece, and the buffer piece abuts against the side wall of the pier (2).

2. The prefabricated bridge damping device according to claim 1, characterized in that: The base comprises a first seat (31), a second seat (32), a limiting rod (33) and a clamping seat (34). The first seat (31) and the second seat (32) are semicircular seats with the same shape, the two limiting rods (33) are connected to the side wall of the first seat (31), the second seat (32) is provided with a through hole, the second seat (32) is slidingly connected to the limiting rod (33), the limiting rod (33) passes through the through hole, and the clamping seat (34) is slidingly connected to the limiting rod (33).

3. The prefabricated bridge damping device according to claim 2, characterized in that: The height adjusting piece comprises two semicircular support cylinders, the two semicircular support cylinders are arranged on the first seat (31) and the second seat (32) respectively, the semicircular support cylinder comprises an arc-shaped plate (43) and an arc-shaped cover (41), the arc-shaped cover (41) is sleeved on the arc-shaped plate (43), the back of the arc-shaped plate (43) is provided with a first clamping strip (42) from top to bottom, the top of the first clamping strip (42) is horizontally arranged, the inner side of the arc-shaped cover (41) is provided with a second clamping strip (44), and the first clamping strip (42) and the second clamping strip (44) are clamped.

4. The prefabricated bridge damping device according to claim 3, characterized in that: The inner side of the arc-shaped plate (43) is vertically provided with a plurality of first plug-in grooves (46), the inner side of the arc-shaped cover (41) is vertically provided with a plurality of second plug-in grooves (45), the first plug-in grooves (46) and the second plug-in grooves (45) are arranged in a T shape, the buffer piece is inserted into the first plug-in grooves (46) and the second plug-in grooves (45), and the buffer piece comprises a buffer arm and a buffer block (59).

5. The prefabricated bridge damping device according to claim 4, characterized in that: The buffer arm comprises a sliding seat, a first contact block (56), a spring (55), a hydraulic buffer (54) and an extrusion block (533). The sliding seat comprises a sliding part (51) and a connecting part (52), the sliding part (51) and the connecting part (52) are hollow, the connecting part (52) is vertically connected to the middle part of the sliding part (51), the connecting part (52) and the sliding part (51) are communicated, the first contact block (56) is fixed to one end of the hydraulic buffer (54), the extrusion block (533) is fixed to the other end of the hydraulic buffer (54), the hydraulic buffer (54) is inserted into the connecting part (52), the extrusion block (533) extends into the sliding part (51), the spring (55) is sleeved outside the hydraulic buffer (54), one end of the spring (55) abuts against the first contact block (56), and the other end of the spring (55) abuts against the connecting part (52).

6. The prefabricated bridge damping device according to claim 5, characterized in that: Two top blocks (57) are arranged in the sliding part (51), and the end of the extrusion block (533) is arranged in a conical frustum shape, and the two top blocks (57) are respectively arranged at the upper and lower ends of the extrusion block (533), and the end of the top block (57) close to the extrusion block (533) is provided with a first inclined surface, and the end of the extrusion block (533) is attached to the first inclined surface of the top block (57); The buffer block (59) is hollow, and the top and bottom of the buffer block (59) are communicated, and the buffer block (59) is provided with a compression ball (50) inside, and the end of the top block (57) is provided with a protrusion (58), and the protrusion (58) extends into the buffer block (59).

7. The prefabricated bridge damping device according to claim 6, wherein: Further comprising an outer support for supporting the height adjusting member, two outer supports are respectively arranged on both sides of the height adjusting member, and the two outer supports are connected to each other; The outer support comprises a fixing ring (61), a support arm and a fixing seat (65), the fixing ring (61) is a semi-circular ring, the inner side of the fixing ring (61) is provided with a clamping block (62), the clamping block (62) is matched with the first clamping strip (42), and the top of the fixing ring (61) is fixed with a buffer pad; The support arm comprises a sleeve (64), a support rod (63) and a buffer air bag (60), the buffer air bag (60) is arranged in the sleeve (64), the support rod (63) is inserted into the sleeve (64) and abuts against the buffer air bag (60), and a buffer cavity (601) is formed in the sleeve (64) and located at one side of the buffer air bag (60); The fixing seat (65) is provided with a pressing groove (69) therein, the pressing groove (69) is communicated with the bottom of the fixing seat (65), the first inclined push block (67) is vertically and slidably connected to the bottom of the pressing groove (69), the first inclined push block (67) is provided with a plug (68) at the bottom, the second inclined push block (66) is horizontally and slidably connected to the pressing groove (69), the inclined surface of the first inclined push block (67) is in contact with the inclined surface of the second inclined push block (66), the support rod (63) is rotatably connected with the fixing ring (61), and the sleeve (64) is rotatably connected with the second inclined push block (66).

8. The prefabricated bridge damping device according to claim 7, wherein: The contact member comprises a plurality of adjusting blocks, and the top of the arc-shaped cover (41) is fixed with an expansion plate (71), The adjusting blocks are fixed on the expansion plate (71); the adjusting block comprises a second contact block (74), a fixing nail (76), a pushing block and a mounting seat (72); The mounting seat (72) is provided with a sliding groove (73), and the two second contact blocks (74) are slidably connected to the sliding groove (73); each second contact block (74) is provided with a plurality of fixing nails (76); the pushing block is slidably connected to the sliding groove (73) and located between the two second contact blocks (74); and the second contact block (74) is fixed with a rubber resisting block (75) at the end away from the pushing block.

9. The prefabricated bridge damping device according to claim 8, wherein: The pushing block comprises an adjusting seat (77) and an adjusting shaft (78); The middle part of the adjusting seat (77) is fixed with a one-way bearing (701), both sides of the adjusting seat (77) are fixed with fixed plates (70), the adjusting shaft (78) passes through the one-way bearing (701) and is fixedly connected with the inner ring of the one-way bearing (701), both ends of the adjusting shaft (78) are provided with sleeve holes, both sleeve holes are inserted with screw rods (79), the screw rods (79) pass through the adjacent fixed plates (70) and are in threaded connection with the fixed plates (70), one end of the screw rod (79) is conically arranged, and the other end of the screw rod (79) is in spline connection with the sleeve hole; The second contact block (74) is provided with a slot on one side, and the top of the second contact block (74) is provided with a plurality of channels, and each channel is provided with a fixing nail (76); the screw rod (79) is inserted into the slot.

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