Clearance type energy dissipation type anti-beam-falling device

Abstract

The invention belongs to the technical field of bridge beam falling prevention and discloses a clearance type energy dissipation beam falling prevention device which comprises a friction cylinder, one end of the friction cylinder is sleeved with an outer cylinder, two semicircular cover plates are symmetrically arranged at one end of the outer cylinder, and the other end of the outer cylinder is detachably connected with an outer cylinder connecting plate. The adjacent cover plates are detachably connected, and friction plates are arranged on the inner walls of the cover plates; a sliding shaft with the two ends extending out of the friction cylinder is coaxially and slidably connected into the friction cylinder, a sliding shaft connecting plate is detachably connected to the end, away from the outer cylinder, of the sliding shaft, limiting rings slidably arranged on the sliding shaft in a sleeving mode are fixedly connected to the two ends of the friction cylinder, and locking structures are arranged between the limiting rings and the sliding shaft. The invention aims to solve the problems that the design of a traditional anti-falling beam device adopts rigid limiting and does not have energy dissipation capacity; and the problem of early loss of the energy-consuming element due to the influence of accumulated displacement of the beam end caused by temperature change is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge beam-falling prevention, and in particular relates to a gap-type energy-consuming beam-falling prevention device. Background Art

[0002] Historically, investigations into damage caused by strong earthquakes have found that the failure of superstructure beams falling is one of the most common and serious bridge damage modes. The most direct impact of bridge beam failure is blocking traffic, which seriously affects emergency rescue and earthquake relief work after the earthquake, and thus causes greater casualties and economic losses. In addition, when the beam falls, the end of the beam may hit the bridge pier, causing damage to the pier or even the collapse of the entire bridge, making it difficult to repair the bridge structure after the earthquake, resulting in more serious economic losses and adverse social impacts.

[0003] Traditional beam-falling prevention devices are mostly designed with blocking-type devices, with blocks mainly used in the transverse direction and cable limiters mainly used in the longitudinal direction. Both devices are rigid limiters and do not have energy-absorbing capabilities. There are also certain rigid collision problems. In addition, beam-falling prevention devices that also have energy-absorbing functions are easily affected by the cumulative displacement of the beam ends caused by temperature changes, resulting in early wear of energy-absorbing components. Summary of the invention

[0004] In view of this, the present invention discloses a gap-type energy-absorbing beam-falling prevention device, which aims to solve the problem that the traditional beam-falling prevention device is designed with rigid limit and does not have energy-absorbing capacity; and the energy-absorbing components are early worn out due to the cumulative displacement of the beam ends caused by temperature changes.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A gap-type energy-absorbing beam-falling prevention device comprises a friction cylinder, one end of which is sleeved with an outer cylinder, one end of which is symmetrically provided with two semicircular cover plates, the other end of which is detachably connected with an outer cylinder connecting plate for connecting with a bridge beam body and a bridge pier; adjacent cover plates are detachably connected, and friction plates in contact with the friction cylinder are provided on the inner walls of the cover plates; a sliding shaft with both ends extending out of the friction cylinder is coaxially slidably connected inside the friction cylinder, and the end of the sliding shaft away from the outer cylinder is detachably connected with a sliding shaft connecting plate for connecting with a bridge beam body and a bridge pier, both ends of the friction cylinder are fixedly connected with limit rings slidably sleeved on the sliding shaft, and the outer diameter of the limit ring is smaller than the inner diameter of the outer cylinder port, and a locking structure is provided between the limit ring and the sliding shaft.

[0007] In the present scheme, when an earthquake occurs, the locking structure restricts the limiting ring from sliding on the sliding shaft. At this time, the beam body drives the sliding shaft to move back and forth through the sliding shaft connecting plate, and the sliding shaft drives the friction cylinder and the friction plate to continuously generate friction through the limiting ring, thereby playing a role of energy consumption, and avoiding the beam body and the anti-falling beam device from being damaged by a rigid collision; at the same time, the end of the cover plate and the end of the outer cylinder are used to restrict the limiting ring, and prevent the friction cylinder from detaching from the cover plate, thereby playing a limiting role on the beam body, and preventing the beam body from being detached due to excessive displacement; in addition, when no earthquake occurs, the locking structure does not restrict the limiting ring from sliding on the sliding shaft. When the temperature factor causes the end of the beam body to displace, the sliding shaft can slide relative to the limiting ring, thereby avoiding the limiting ring from driving the sliding shaft to move, and preventing the friction cylinder and the friction plate from being relatively displaced, resulting in premature loss of energy-consuming materials.

[0008] Furthermore, the inside of the limit ring is coaxially provided with an installation groove, and the locking structure includes a rotating ring coaxially rotatably connected to the installation groove, the rotating ring is threadedly connected to the sliding shaft, and the outer wall of the rotating ring is provided with a plurality of sliding grooves toward the center of its circle, and a limit pin is slidably connected in the sliding groove, and an elastic support member is arranged between the limit pin and the limit groove, and positioning holes are arranged on both sides of the limit pin, and the end of the limit pin is arc-shaped; the inner wall of the limit ring of the connecting device is provided with a plurality of limit holes adapted to the limit pin, and installation holes are arranged on both sides of the limit hole, and a positioning rod perpendicular to the limit pin is slidably connected in the mounting hole, and an elastic support member is also arranged between the positioning rod and the mounting hole.

[0009] In this scheme, when the beam end is displaced due to temperature factors, the sliding shaft connecting plate drives the sliding shaft to displace slowly, the limit ring limits the movement of the rotating ring, and then the rotating ring is synchronously and slowly rotated through the threaded connection between the rotating ring and the sliding shaft. At this time, the centrifugal force on the limit pin inside the rotating ring is small and cannot overcome the elastic force of the corresponding elastic support member, so that the sliding shaft cannot push the friction cylinder and the friction plate through the limit ring to avoid premature loss of energy-consuming materials. When the beam end is displaced due to an earthquake, the beam body drives the sliding shaft to quickly displace relative to the friction cylinder through the sliding shaft connecting plate. The limit ring is used to limit the rotation of the rotating ring, so that the limit ring and the sliding shaft will not move relative to each other, and the limit ring and the sliding shaft will not move relative to each other, so that the limit ring and the sliding shaft will not move relative to each other, and the limit ring and the sliding shaft will push the friction cylinder to trigger the subsequent energy consumption process.

[0010] Furthermore, the length of the cover plate is greater than that of the friction plate, and a concave cavity for embedding the friction plate is provided on the inner wall of the cover plate, and the friction plate can slide in the concave cavity along the axial direction of the friction cylinder, and a plate body extending into the concave cavity is provided on the side wall of the friction cylinder, and support shafts rotatably connected to the concave cavity are provided on both sides of the plate body, and a reversing gear and a driven gear are fixed on the support shaft, the diameter of the reversing gear is smaller than the diameter of the driven gear, and the plate body is meshed with the reversing gear; a through groove for accommodating the reversing gear and the plate body is provided on the friction plate, and the friction plate is meshed with the corresponding driven gear.

[0011] In this scheme, when the friction cylinder moves relative to the friction plate, the plate body at the end of the friction cylinder drives the supporting shaft to rotate through the reversing gear, and the supporting shaft drives the friction plate to move in the opposite direction relative to the friction cylinder through the driven gear, thereby intensifying the friction between the friction cylinder and the friction plate under the condition of the same displacement of the beam body, thereby improving the energy consumption efficiency; and the diameter of the reversing gear is smaller than the diameter of the driven gear, so that the linear speed of the driven gear is greater than the linear speed of the reversing gear, thereby accelerating the moving speed of the friction plate, further intensifying the friction between the friction cylinder and the friction plate, and assisting in improving the energy consumption efficiency.

[0012] Furthermore, coaxial grooves are provided at both ends of the inner wall of the friction cylinder, and elastic guide belts are provided in the grooves, and the guide belts protrude from the grooves.

[0013] Furthermore, pin holes are reserved at the ends of the sliding shaft connecting plate and the outer cylinder connecting plate.

[0014] Furthermore, ear plates are provided at both ends of the cover plate, and rubber sealing pads are provided between adjacent ear plates.

[0015] Furthermore, a bellows is fixed between the sliding shaft connecting plate and the adjacent limiting ring.

[0016] Furthermore, adjacent cover plates are detachably connected via bolts, nuts are provided at both ends of the bolts, steel pads are provided on the nuts, and disc springs are provided between the steel pads and adjacent cover plates.

[0017] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0019] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0020] Figure 2 is a transverse cross-sectional view of an embodiment of the present invention;

[0021] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0022] Figure 4 for Figure 3 The enlarged schematic diagram of the center C;

[0023] Figure 5 A longitudinal cross-sectional view of an embodiment of the present invention;

[0024] Figure 6 for Figure 5 A magnified schematic diagram of point B in the middle.

[0025] The markings in the accompanying drawings are as follows: friction cylinder 1, outer cylinder 2, outer cylinder connecting plate 3, cover plate 4, friction plate 5, sliding shaft 6, sliding shaft connecting plate 7, limiting ring 8, rotating ring 9, limiting pin 10, elastic support 11, limiting hole 12, positioning hole 13, positioning rod 14, plate body 15, support shaft 16, reversing gear 17, driven gear 18, guide belt 19, pin shaft hole 20, rubber sealing gasket 21, bellows 22, bolt 23, steel pad 24, nut 25, disc spring 26. DETAILED DESCRIPTION

[0026] like Figures 1 to 6 As shown:

[0027] A gap-type energy-absorbing beam-falling prevention device comprises a friction cylinder 1, one end of which is sleeved with an outer cylinder 2, one end of which is symmetrically provided with two semicircular cover plates 4, and the other end of which is threadedly connected with an outer cylinder connecting plate 3 for connecting with a bridge beam body and a bridge pier; adjacent cover plates 4 are detachably connected, and a friction plate 5 in contact with the friction cylinder 1 is provided on the inner wall of the cover plate 4; a sliding shaft 6 with both ends extending out of the friction cylinder 1 is coaxially slidably connected inside the friction cylinder 1, and one end of the sliding shaft 6 away from the outer cylinder 2 is threadedly connected with a sliding shaft connecting plate 7 for connecting with a bridge beam body and a bridge pier, and both ends of the friction cylinder 1 are welded and fixed with limiting rings 8, the limiting ring 8 is slidably sleeved on the sliding shaft 6, and the outer diameter of the limiting ring 8 is smaller than the inner diameter of the end of the outer cylinder 2, and a locking structure is provided between the limiting ring 8 and the sliding shaft 6.

[0028] In the present scheme, when an earthquake occurs, the locking structure restricts the limiting ring 8 from sliding on the sliding shaft 6. At this time, the beam body drives the sliding shaft 6 to move back and forth through the sliding shaft connecting plate 7, and the sliding shaft 6 drives the friction cylinder 1 and the friction plate 5 to continuously generate friction through the limiting ring 8, thereby playing an energy-consuming role and preventing the beam body from being damaged by a rigid collision with the anti-falling beam device; at the same time, the end of the cover plate 4 and the end of the outer cylinder 2 are used to restrict the limiting ring 8 to prevent the friction cylinder 1 from separating from the cover plate 4, thereby playing a limiting role on the beam body and preventing the beam body from being separated due to excessive displacement; in addition, when no earthquake occurs, the locking structure does not restrict the limiting ring 8 from sliding on the sliding shaft 6. When the temperature factor causes the end of the beam body to be displaced, the sliding shaft 6 can slide relative to the limiting ring 8, thereby preventing the limiting ring 8 from driving the sliding shaft 6 to move, preventing the friction cylinder 1 and the friction plate 5 from being relatively displaced, resulting in premature loss of energy-consuming materials.

[0029] In this embodiment, the inside of the limit ring 8 is coaxially provided with an installation groove, and the locking structure includes a rotating ring 9 that is coaxially rotatably connected to the installation groove. The rotating ring 9 is threadedly connected to the sliding shaft 6, and a plurality of sliding grooves toward the center of the circle are provided on the outer wall of the rotating ring 9. A limit pin 10 is slidably connected in the sliding groove, and an elastic support member 11 is provided between the limit pin 10 and the limit groove. Positioning holes 13 are provided on both sides of the limit pin 10, and the end of the limit pin 10 is arc-shaped; the inner wall of the limit ring 8 of the connecting device is provided with a plurality of limit holes 12 that are adapted to the limit pin 10, and installation holes are provided on both sides of the limit hole 12, and a positioning rod 14 perpendicular to the limit pin 10 is slidably connected in the mounting hole, and an elastic support member 11 is also provided between the positioning rod 14 and the mounting hole.

[0030] In this solution, when the beam end is displaced due to temperature factors, the sliding shaft connecting plate 7 drives the sliding shaft 6 to displace slowly, and the limit ring 8 limits the movement of the rotating ring 9, and then the rotating ring 9 is synchronously and slowly rotated through the threaded connection between the rotating ring 9 and the sliding shaft 6. At this time, the centrifugal force on the limit pin 10 inside the rotating ring 9 is small and cannot overcome the elastic force of the corresponding elastic support member 11, so that the sliding shaft 6 cannot push the friction cylinder 1 and the friction plate 5 through the limit ring 8 to cause friction, thereby avoiding premature loss of energy-consuming materials; when the beam end is displaced due to an earthquake, the beam body drives the sliding shaft 6 to displace rapidly relative to the friction cylinder 1 through the sliding shaft connecting plate 7. At this time, the limit ring 8 is displaced relative to the sliding shaft 6 at an accelerated speed, causing the rotating ring 9 to rotate rapidly, resulting in a large centrifugal force on the limit pin 10 inside the movable ring, so that the limit pin 10 overcomes the elastic force of the elastic support 11 and is inserted into the corresponding limit hole 12, and squeezes the positioning rod 14 to compress the corresponding elastic support 11 to slide into the installation hole until the positioning hole 13 is opposite to the positioning rod 14. The positioning rod 14 is inserted into the corresponding positioning hole 13 under the action of the elastic support 11, and the limit ring 8 is used to limit the rotating ring 9 from continuing to rotate, so that the limit ring 8 and the sliding shaft 6 no longer move relative to each other, and then the limit ring 8 pushes the friction cylinder 1 with the sliding shaft 6 to trigger the subsequent energy consumption process.

[0031] In this embodiment, the length of the cover plate 4 is greater than that of the friction plate 5, and a concave cavity for embedding the friction plate 5 is provided on the inner wall of the cover plate 4, and the friction plate 5 can slide in the concave cavity along the axial direction of the friction cylinder 1, and a plate body 15 extending into the concave cavity is provided on the side wall of the friction cylinder 1, and support shafts 16 rotatably connected to the concave cavity are provided on both sides of the plate body 15, and a reversing gear 17 and a driven gear 18 are fixed on the support shaft 16, and the diameter of the reversing gear 17 is smaller than the diameter of the driven gear 18, and the plate body 15 is meshed with the reversing gear 17; a through groove for accommodating the reversing gear 17 and the plate body 15 is provided on the friction plate 5, and the friction plate 5 is meshed with the corresponding driven gear 18.

[0032] In this solution, when the friction cylinder 1 moves relative to the friction plate 5, the plate body 15 at the end of the friction cylinder 1 drives the support shaft 16 to rotate through the reversing gear 17, and the support shaft 16 drives the friction plate 5 to move in the opposite direction relative to the friction cylinder 1 through the driven gear 18, thereby intensifying the friction between the friction cylinder 1 and the friction plate 5 under the condition of the same displacement of the beam body, thereby improving the energy consumption efficiency; and the diameter of the reversing gear 17 is smaller than the diameter of the driven gear 18, so that the linear speed of the driven gear 18 is greater than the linear speed of the reversing gear 17, thereby accelerating the moving speed of the friction plate 5, further intensifying the friction between the friction cylinder 1 and the friction plate 5, and assisting in improving the energy consumption efficiency.

[0033] In this embodiment, coaxial grooves are provided at both ends of the inner wall of the friction cylinder 1 , and elastic guide strips 19 are bonded in the grooves, and the guide strips 19 protrude out of the grooves.

[0034] The elastic guide belt 19 is provided to guide the movement of the sliding shaft 6 relative to the friction cylinder 1 .

[0035] In this embodiment, pin holes 20 are reserved at the ends of the sliding shaft connecting plate 7 and the outer cylinder connecting plate 3 .

[0036] The pin hole 20 facilitates the connection between the sliding shaft connecting plate 7 and the outer cylinder connecting plate 3 and the main beam or pier of the bridge.

[0037] In this embodiment, ear plates are provided at both ends of the cover plate 4, and rubber sealing pads 21 are provided between adjacent ear plates.

[0038] The rubber sealing pad 21 is provided to prevent environmental impurities from entering the interior of the device and affecting its operation.

[0039] In this embodiment, a bellows 22 is fixed between the sliding shaft connecting plate 7 and the adjacent limiting ring 8 .

[0040] By utilizing the elasticity of the bellows 22 , the bellows 22 can continuously protect the limiting ring 8 during the movement of the limiting ring 8 .

[0041] In this embodiment, adjacent cover plates 4 are detachably connected via bolts 23 , nuts 25 are provided at both ends of the bolts 23 , steel pads 24 are provided on the nuts 25 , and disc springs 26 are provided between the steel pads 24 and the adjacent cover plates 4 .

[0042] The above structure is used to strengthen the connection strength between the cover plates 4; when encountering a large earthquake or an extremely large earthquake, when the limit ring 8 near the end of the sliding shaft connecting plate 7 undergoes an extreme displacement in one direction, the limit ring 8 will contact the end of the cover plate 4, and the cover plate 4, the outer cylinder 2, etc. are compressed to play a limiting role; when the limit ring 8 near the end of the outer cylinder connecting plate 3 produces an extreme displacement in another direction, the limit ring 8 interacts with the inner end of the outer cylinder 2, and the outer cylinder 2 is pulled, and the outer cylinder 2 plays a limiting role. In this direction, the limit ring 8 does not contact the cover plate 4 in the extreme state, thereby avoiding the problem of insufficient strength of the bolts 23 between the cover plate 4 and the outer cylinder 2 being pulled in the extreme state.

[0043] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A gap-type energy-consuming beam-falling prevention device, characterized in that: It includes a friction cylinder, one end of which is sleeved with an outer cylinder, one end of which is symmetrically provided with two semicircular cover plates, the other end of which is detachably connected with an outer cylinder connecting plate for connecting with a bridge beam and a bridge pier; adjacent cover plates are detachably connected, and a friction plate in contact with the friction cylinder is provided on the inner wall of the cover plate; a sliding shaft with two ends extending out of the friction cylinder is coaxially slidably connected inside the friction cylinder, and the end of the sliding shaft away from the outer cylinder is detachably connected with a sliding shaft connecting plate for connecting with a bridge beam and a bridge pier, both ends of the friction cylinder are fixedly connected with a limiting ring slidably sleeved on the sliding shaft, and the outer diameter of the limiting ring is smaller than the inner diameter of the outer cylinder port, and a locking structure is provided between the limiting ring and the sliding shaft.

2. The intermittent energy-dissipating beam-falling prevention device according to claim 1 is characterized in that: The inside of the limit ring is coaxially provided with mounting grooves, and the locking structure includes a rotating ring coaxially rotatably connected to the mounting groove, the rotating ring is threadedly connected to the sliding shaft, a plurality of sliding grooves facing the center of the rotating ring are provided on the outer wall, a limit pin is slidably connected in the sliding groove, an elastic support member is provided between the limit pin and the limit groove, positioning holes are provided on both sides of the limit pin, and the end of the limit pin is arc-shaped; a plurality of limit holes adapted to the limit pin are provided on the inner wall of the limit ring of the connecting device, mounting holes are provided on both sides of the limit hole, a positioning rod perpendicular to the limit pin is slidably connected in the mounting hole, and an elastic support member is also provided between the positioning rod and the mounting hole.

3. The intermittent energy-dissipating beam-falling prevention device according to claim 2 is characterized in that: The length of the cover plate is greater than that of the friction plate, and a concave cavity for embedding the friction plate is provided on the inner wall of the cover plate, and the friction plate can slide in the concave cavity along the axial direction of the friction cylinder, and a plate body extending into the concave cavity is provided on the side wall of the friction cylinder, and support shafts rotatably connected to the concave cavity are provided on both sides of the plate body, and a reversing gear and a driven gear are fixed on the support shaft, the diameter of the reversing gear is smaller than the diameter of the driven gear, and the plate body is meshed with the reversing gear; a through groove for accommodating the reversing gear and the plate body is provided on the friction plate, and the friction plate is meshed with the corresponding driven gear.

4. The intermittent energy-dissipating beam-falling prevention device according to claim 3 is characterized in that: Coaxial grooves are provided at both ends of the inner wall of the friction cylinder. Elastic guide belts are arranged in the grooves, and the guide belts protrude from the grooves.

5. The intermittent energy-dissipating beam-falling prevention device according to claim 4 is characterized in that: The ends of the sliding shaft connecting plate and the outer cylinder connecting plate are both reserved with pin holes.

6. The intermittent energy-dissipating beam-falling prevention device according to claim 5, characterized in that: Ear plates are arranged at both ends of the cover plate, and rubber sealing pads are arranged between adjacent ear plates.

7. The intermittent energy-dissipating beam-falling prevention device according to claim 6 is characterized in that: A bellows is fixed between the sliding shaft connecting plate and the adjacent limiting ring.

8. The intermittent energy-dissipating beam-falling prevention device according to claim 7 is characterized in that: Adjacent cover plates are detachably connected by bolts, nuts are arranged at both ends of the bolts, steel pads are arranged on the nuts, and disc springs are arranged between the steel pads and adjacent cover plates.

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