Beam falling prevention support

Abstract

The utility model relates to the technical field of bridge earthquake resistance, in particular to a beam falling prevention support which comprises an upper support plate, a movable joint and a lower support plate which are sequentially arranged in the height direction. An anchor plate is arranged on the face, away from the lower support plate, of the upper support plate, connected with the upper support plate through a first connecting piece and used for being connected with a beam body. An arc-shaped connecting plate is arranged between the upper support plate and the lower support plate, the upper end of the arc-shaped connecting plate is connected with the anchorage plate through a second connecting piece, and the shear strength of the second connecting piece is larger than that of the first connecting piece; a strip-shaped protruding block is arranged at the lower end of the arc-shaped connecting plate, the strip-shaped protruding block is inserted into a first sliding groove in the lower support plate, and movable gaps are formed between the strip-shaped protruding block and the first sliding groove in the longitudinal bridge direction and the transverse bridge direction. The technical problems that in the prior art, an anti-beam-falling device cannot release temperature displacement, the displacement amount is limited, and the anti-beam-falling device is difficult to be combined with a spherical hinge support or a rubber support for use can be solved.

Description

Technical Field

[0001] This utility model relates to the field of bridge seismic resistance technology, and in particular to a beam-prevention support. Background Technology

[0002] In bridge construction, it is sometimes necessary for the bridge beam to have a certain displacement and rotation capacity relative to the pier. Therefore, movable bearings, including movable joints, need to be installed between the bridge and the pier, such as spherical hinge bearings and rubber bearings. A movable bearing generally includes an upper bearing plate connected to the bridge beam, a lower bearing plate connected to the pier, and a movable joint between the upper and lower bearing plates. For a spherical hinge bearing, its movable joint includes a spherical cap plate. The upper surface of the spherical cap plate is flat and connected to the lower surface of the upper bearing, while the lower surface is spherical and connected to the upper surface of the lower bearing. This allows it to form planar sliding friction pairs and spherical sliding friction pairs with the lower and upper surfaces of the upper and lower bearing plates, respectively, enabling the bridge beam to generate a certain relative displacement and achieve the designed rotation angle relative to the pier. For a rubber bearing, its movable joint includes rubber plates at both ends connected to the lower surface of the upper bearing plate and the upper surface of the lower bearing plate, respectively. The rubber plates can deform to a certain extent, allowing the bridge beam to generate a corresponding relative displacement and achieve the designed rotation angle relative to the pier.

[0003] To prevent the bridge beams from falling off the piers under specific conditions, such as vehicle loads or earthquakes, anti-falling beam devices are required. The design of these devices is based on mechanical principles and engineering experience. Through reasonable structural design and material selection, the devices can effectively resist and absorb the impact force when the bridge is subjected to external impacts or natural disasters, thereby preventing the beams from falling off.

[0004] Most existing anti-fall beam devices utilize high-strength steel, shear keys, or anti-fall beam blocks. These devices employ a strength-based design philosophy, essentially a "hard-on-hard" approach to prevent beam falls. However, with increasing seismic intensity in the areas where bridges are located and the weight of the beams at the supports, the required cross-sectional area for these devices is growing larger. Given the extremely limited space at the pier top, the design of these devices is becoming increasingly complex, leading to higher operating costs. While there are also tenon-shaped anti-fall beam devices that utilize flexibility, these cannot release temperature displacement, resulting in additional loads under temperature variations. Furthermore, their limited displacement makes them unsuitable for combination with movable ball joint bearings or rubber bearings. Therefore, there is an urgent need to develop a new type of bearing that combines anti-fall beam functionality with mobility. Utility Model Content

[0005] The purpose of this utility model is to overcome the technical problems in the prior art that the anti-fall beam device cannot release temperature displacement and has a limited displacement amount, making it difficult to combine with ball joint support or rubber support, and to provide an anti-fall beam support.

[0006] In a first aspect, this utility model provides an anti-fall beam support, comprising an upper support plate, a movable joint, and a lower support plate arranged sequentially along the height direction; an anchor plate is provided on the side of the upper support plate opposite to the lower support plate, the anchor plate is connected to the upper support plate through a first connector, and the anchor plate is used to connect with the beam body; an arc-shaped connecting plate is provided between the upper support plate and the lower support plate, the upper end of the arc-shaped connecting plate is connected to the anchor plate through a second connector, the shear strength of the second connector is greater than the shear strength of the first connector; a strip-shaped protrusion is provided at the lower end of the arc-shaped connecting plate, the strip-shaped protrusion is inserted into a first groove on the lower support plate, and an movable gap is provided between the strip-shaped protrusion and the first groove along both the longitudinal and transverse directions of the bridge; the number of arc-shaped connecting plates is at least one, and the generatrix setting direction of the arc-shaped connecting plates includes at least one of the transverse and longitudinal directions of the bridge; the number and setting direction of the first groove match the number and setting direction of the arc-shaped connecting plates.

[0007] The anti-fall beam support in this scheme is a movable support consisting of an upper support plate, a movable joint, and a lower support plate (for example, when the movable joint includes a spherical crown liner, the movable support is a spherical hinge support; when the movable joint includes a rubber plate, the movable support is a rubber support). An anchor plate connected to the beam body is independently installed above the upper support plate. One end of the arc-shaped connecting plate is connected to the anchor plate, and the other end is slidably connected to the first groove of the lower support plate through a strip-shaped protrusion.

[0008] Because there are longitudinal and transverse movable gaps between the strip protrusion and the first sliding groove, the beam can still move and rotate relative to the pier to a certain extent. This can be used to release temperature displacement and to achieve the design angle or other design displacements. Therefore, as long as the movable gap is matched with the temperature displacement, design angle or other design displacements between the beam and the pier, the arc-shaped connecting plate can avoid hindering the movement of the movable support, release temperature displacement, and prevent the temperature displacement from generating additional loads on the movable support.

[0009] When the beam undergoes displacement or rotation relative to the pier exceeding the limits of the movable gap due to external impact or natural disaster, both the upper support plate and the arc-shaped connecting plate will move relative to the lower support plate under the influence of the beam. This causes both the first and second connecting parts to be subjected to shearing action. However, since the shear strength of the second connecting part is greater than that of the first connecting part, the first connecting part will be sheared before the second connecting part, resulting in the disconnection of the connection between the anchor plate and the upper support plate. This allows the anchor plate to continue to move at a greater extent without being restricted by the movable support, thereby causing the arc-shaped connecting plate to undergo corresponding plastic hysteretic deformation. This not only absorbs and dissipates a large amount of vibration energy during the deformation process but also controls the structural displacement between the beam and the pier. This ensures that the damping force for the designed anti-falling beam displacement is greater than the designed anti-falling beam force, thus preventing beam falling accidents and ensuring normal passage of the bridge after accidents or earthquakes. This is also beneficial for the timely conduct of post-disaster rescue and relief work.

[0010] After the impact of external forces or natural disasters, as mentioned above, the connection between the upper support plate and the anchor plate is broken due to the shearing of the first connecting piece. Therefore, the upper support plate will not undergo significant displacement relative to the movable joint and the lower support plate under the action of the beam. This solution can avoid damage to the precision movable support due to significant relative displacement between the beam and the pier. Only the first connecting piece and the arc-shaped connecting plate will undergo shearing and torsional deformation, respectively. After the impact of external forces or natural disasters, it is only necessary to reset the beam and replace the first connecting piece and the arc-shaped connecting plate. This solution has the advantages of convenient maintenance and low maintenance cost.

[0011] Preferably, a strip-shaped limiting block is detachably connected to the lower support plate, and the number and setting direction of the strip-shaped limiting block match the number and setting direction of the first sliding groove; the bottom surface of the strip-shaped limiting block is provided with a groove structure, and the strip-shaped limiting block and the lower support plate enclose to form the first sliding groove, and the first sliding groove opens to one side facing the corresponding arc-shaped connecting plate.

[0012] The first slide groove of this solution is formed by the groove structure at the bottom of the strip-shaped limiting block and the lower support plate. It can effectively limit the relative displacement between the strip-shaped protrusion and the first slide groove through the inner wall of the groove structure and the upper surface of the lower support plate, thereby avoiding the strip-shaped protrusion from moving too far relative to the first slide groove, or even falling out of the first slide groove.

[0013] Meanwhile, the strip-shaped limiting block and the lower support plate of this solution are detachably connected. When installing the arc-shaped connecting plate, the strip-shaped limiting block can be removed first, the strip-shaped protrusion of the arc-shaped connecting plate can be moved into place, and then the strip-shaped limiting block can be reinstalled. The operation is simple and quick. In addition, under this installation method, the strip-shaped protrusion does not need to enter the first slide groove through the opening of the first slide groove. Therefore, its size is not limited by the opening size of the first slide groove, which is conducive to increasing the size of the strip-shaped protrusion, thereby enhancing the limiting effect of the first slide groove on the arc-shaped connecting plate.

[0014] Preferably, the first chute is provided with stop structures at both ends along its length.

[0015] This solution can prevent the strip protrusion from moving too far relative to the first slide groove along the length of the first slide groove, or even from coming out of the first slide groove.

[0016] Preferably, the arc-shaped connecting plate is provided with a strip groove, the length of which is set along the arc length direction of the arc-shaped connecting plate.

[0017] This design not only suppresses stress concentration in the curved connecting plate through the strip groove, but also makes the curved connecting plate more susceptible to torsional deformation in response to the relative displacement between the beam and the pier, thus enabling more reliable absorption and dissipation of seismic energy. The strip groove also reduces the self-weight of the curved connecting plate, thereby reducing the difficulty of transportation and hoisting, as well as the load it exerts on the pier.

[0018] Preferably, the number of strip grooves is at least two, and the strip grooves are distributed at intervals along the generatrix direction of the arc-shaped connecting plate.

[0019] Preferably, the movable joint includes a ball-shaped liner or a rubber plate.

[0020] As described above, the subject of this utility model can be adapted to a support with mobility, and therefore can be used for both ball joint supports and rubber supports.

[0021] Preferably, limit blocks are provided at both ends of the upper support plate along the transverse direction of the bridge, and a movable gap is provided between the limit blocks and the corresponding side wall of the lower support plate.

[0022] This design prevents the upper support plate from displacing excessively relative to the lower support plate in the transverse direction and separating from the lower support plate. At the same time, a movable gap is provided between the limiting block and the side wall of the lower support plate. This movable gap allows for a small range of relative displacement between the upper and lower support plates to meet the normal movement requirements of the movable support, such as relative rotation to meet the design rotation angle of the beam.

[0023] Preferably, a steel strip is provided on one of the limiting block and the side wall of the lower support plate, and a wear-resistant strip is provided at the corresponding position of the other of the limiting block and the lower support plate. The lengths of the steel strip and the wear-resistant strip are both set along the longitudinal direction of the bridge.

[0024] This solution replaces the direct contact between the limiting block and the lower support plate with the mutual contact between the wear-resistant strip and the steel strip, thereby avoiding direct contact and relative sliding between the limiting block and the lower support plate, which would otherwise lead to scratches between them.

[0025] Preferably, the projection of the arc-shaped connecting plate onto a plane perpendicular to its generatrix is ​​C-shaped.

[0026] This solution recommends one specific shape for the arc-shaped connecting plate, which not only enables the arc-shaped connecting plate to have good deformation capacity, thus accommodating a wider range of relative displacement between the beam and the pier, but also makes the arc-shaped connecting plate easy to design and manufacture, thereby avoiding excessive design difficulty or manufacturing costs.

[0027] Preferably, an anchor rod is provided on the top surface of the anchor plate, and / or an anchor rod is provided on the bottom surface of the lower support plate.

[0028] This solution ensures a reliable connection between the anchor plate and the beam, and / or a reliable connection between the lower support plate and the pier.

[0029] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0030] This utility model provides a beam anti-fall support, which is a movable support consisting of an upper support plate, a movable joint, and a lower support plate. An anchor plate connected to the beam is independently set on the upper support plate. One end of the arc-shaped connecting plate is connected to the anchor plate, and the other end is slidably connected to the first groove of the lower support plate through a strip-shaped protrusion. Since there is a longitudinal and transverse bridge direction movable gap between the strip-shaped protrusion and the first groove, the movable support can normally move and rotate under normal conditions, thereby releasing temperature displacement or achieving the designed rotation angle.

[0031] When an external impact or earthquake occurs, the first connector will be sheared before the second connector, causing the anchor plate to separate from the upper support plate. This allows the bridge to undergo a large displacement relative to the pier under the influence of the beam, and also causes the arc-shaped connecting plate to undergo plastic hysteresis deformation. This enables the bridge to absorb and dissipate vibration energy and control the structural displacement between the beam and the pier, thereby preventing beam collapse accidents and ensuring normal passage of the bridge after an accident or earthquake. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of an anti-fall beam support according to the present invention;

[0033] Figure 2 This is a schematic diagram of the main structure of an anti-fall beam support according to this utility model;

[0034] Figure 3 This is a schematic diagram of the main structure of an anti-fall beam support after deformation according to this utility model;

[0035] Figure 4 yes Figure 2 A magnified schematic diagram of the local structure at point A;

[0036] Figure 5 yes Figure 2 A magnified schematic diagram of the local structure at point B;

[0037] Figure 6 This is a three-dimensional structural diagram of the lower support plate of an anti-fall beam support according to this utility model.

[0038] Figure 7 This is a three-dimensional structural diagram of a strip-shaped limiting block for an anti-falling beam support according to this utility model;

[0039] Figure 8 This is a top view schematic diagram of an anti-fall beam support according to this utility model. Figure 1 ;

[0040] Figure 9 This is a top view schematic diagram of an anti-fall beam support according to this utility model. Figure 2 ;

[0041] icon:

[0042] 11-Anchor plate; 12-Upper support plate; 121-Limiting block; 13-First connecting piece;

[0043] 2-Spherical crown liner;

[0044] 3-Lower support plate; 31-First slide groove; 32-Strip-shaped limiting block; 321-Groove structure; 322-Stop structure; 33-Mounting limiting block; 34-Counterhead screw;

[0045] 4-Arc-shaped connecting plate; 41-Second connecting piece; 42-Strip-shaped protrusion; 43-Strip groove;

[0046] 5-Steel bar; 6-Wear-resistant bar; 7-Anchor rod. Detailed Implementation

[0047] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0048] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0049] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0050] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0051] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0052] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0053] Example 1

[0054] like Figures 1 to 9 As shown, an anti-fall beam support includes an upper support plate 12, a movable joint, and a lower support plate 3 arranged sequentially along the height direction. An anchor plate 11 is provided on the side of the upper support plate 12 facing away from the lower support plate 3. The anchor plate 11 is connected to the upper support plate 12 via a first connector 13 and is used to connect to the beam body. An arc-shaped connecting plate 4 is provided between the upper support plate 12 and the lower support plate 3. The upper end of the arc-shaped connecting plate 4 is connected to the anchor plate 11 via a second connector 41. The second connector 41 has a shear strength of... The shear strength is greater than that of the first connector 13; the lower end of the arc-shaped connecting plate 4 is provided with a strip-shaped protrusion 42, which is inserted into the first sliding groove 31 on the lower support plate 3, and there is an movable gap between the strip-shaped protrusion 42 and the first sliding groove 31 along both the longitudinal and transverse directions; the number of arc-shaped connecting plates 4 is at least one, and the direction of the generatrix of the arc-shaped connecting plate 4 includes at least one of the transverse and longitudinal directions; the number and direction of the first sliding groove 31 match the number and direction of the arc-shaped connecting plates 4.

[0055] It is important to note that Figure 2 This is a front view of the anti-fall beam support when the bridge is working normally and the arc-shaped connecting plate 4 has not deformed. Figure 3 This is a front view of the anti-fall beam support after the curved connecting plate 4 deforms due to a large displacement of the beam relative to the pier; Figures 2 to 5 ,as well as Figures 8 to 9 The diagram also uses a Cartesian coordinate system to illustrate the various directions, with the X-axis representing the longitudinal direction, the Y-axis representing the transverse direction, and the Z-axis representing the height direction.

[0056] In an optional embodiment, the movable joint includes a ball-and-socket liner 2, thereby forming a ball-and-socket support together with the upper support plate 12 and the lower support plate 3; for example... Figures 1 to 8 As shown, the upper surface of the spherical crown liner 2 is flat, and the lower surface is spherical. Correspondingly, the lower surface of the upper support plate 12 is also flat and abuts against the upper surface of the spherical crown liner 2, thus forming a planar sliding friction pair of the support. The upper surface of the lower support plate 3 is provided with a ball socket, which abuts against the spherical surface of the spherical crown liner 2, thus forming a spherical sliding friction pair. In addition to the spherical crown liner 2, depending on the actual situation of the bridge, the movable joint can also include a rubber plate, so that it can form a rubber bearing together with the upper support plate 12 and the lower support plate 3.

[0057] The arc-shaped connecting plate 4 is obtained by moving a generatrix along an arc-shaped trajectory curve, for example... Figures 1 to 2The arc shape of the arc-shaped connecting plate 4 is obtained by the movement of a generatrix parallel to the X-axis along a trajectory curve on the YOZ plane; the direction of the generatrix of the arc-shaped connecting plate 4 includes at least one of the transverse and longitudinal directions. For example, when there is one arc-shaped connecting plate 4, the generatrix of the arc-shaped connecting plate 4 can be set along the transverse or longitudinal direction; when there are at least two arc-shaped connecting plates 4, it can be set as follows: Figure 8 As shown, the generatrices of the two arc-shaped plates are arranged in the same direction, such as the longitudinal or transverse direction. Alternatively, at least one arc-shaped connecting plate 4 can be arranged in both the longitudinal and transverse directions, for example... Figure 9 As shown.

[0058] Matching the number and orientation of the first sliding groove with the number and orientation of the arc-shaped connecting plates means, for example, when there is one arc-shaped connecting plate and the busbar of the arc-shaped connecting plate is set along the transverse bridge direction, there is also one first sliding groove and its length is set along the transverse bridge direction; when there is one arc-shaped connecting plate and the busbar of the arc-shaped connecting plate is set along the longitudinal bridge direction, there is also one first sliding groove and its length is set along the longitudinal bridge direction; when there are two arc-shaped connecting plates and the busbars of the two arc-shaped connecting plates are set along the transverse bridge direction and the longitudinal bridge direction respectively, there are also two first sliding grooves and the two first sliding grooves are set along the transverse bridge direction and the longitudinal bridge direction respectively.

[0059] The trajectory curve of the arc-shaped connecting plate 4 can be of various shapes including arc segments (such as circular arcs, elliptical arcs, or parabolas), such as “C” shape, “G” shape, or “ε” shape, so that the arc-shaped connecting plate 4 can undergo torsional deformation with the relative displacement of the beam and the pier.

[0060] The shear strength of the second connector 41 is greater than that of the first connector 13, meaning that when the relative displacement between the beam and the pier gradually increases, the first connector 13 can shear before the second connector 41. The specific value of the movable gap between the strip protrusion 42 and the first slide groove 31 should be such that it can meet the relative displacement and relative rotation requirements of the upper support plate 12 and the lower support plate 3 during normal operation. For example, the movable gap between the strip protrusion 42 and the first slide groove 31 along the longitudinal direction of the bridge can be greater than the temperature displacement of the support, while the movable gap between the strip protrusion 42 and the first slide groove 31 along the transverse direction of the bridge can match the design rotation angle between the beam and the pier.

[0061] In an optional embodiment, the projection of the arc-shaped connecting plate 4 onto a plane perpendicular to its generatrix is ​​C-shaped. It should be noted that this discussion only addresses the general shape and orientation of the arc-shaped connecting plate 4. Figure 2Taking the arc-shaped connecting plate 4 as an example, one end of it is connected to the anchor plate 11, then extends away from the anchor plate 11 along the transverse bridge direction, and then curves downwards towards the lower support plate 3. Finally, it moves towards the lower support plate 3 along the transverse bridge direction and connects with the first sliding groove 31 on the lower support plate 3, without considering the auxiliary structures of the arc-shaped connecting plate 4 such as the second connecting piece 41 and the strip protrusion 42; for example Figure 2 As shown, when the busbar of the arc-shaped connecting plate 4 is set along the longitudinal bridge direction, considering the strip protrusion 42, the actual projected shape of the arc-shaped connecting plate 4 on the plane perpendicular to the longitudinal bridge direction is between the "C" shape and the "G" shape.

[0062] In an optional embodiment, the arc-shaped connecting plate 4 and the strip-shaped protrusion 42 can be two parts of an integrated component or two independent components that are connected to each other.

[0063] In an optional embodiment, the arc-shaped connecting plate 4 may be made of steel with strong and stable hysteresis deformation capacity after yielding deformation, including but not limited to LY225 steel, Q235 steel or Q355 steel.

[0064] In optional embodiments, the specific structural form of the first connector 13 includes, but is not limited to, a threaded connector, a pin, or a tenon; similarly, the specific structural form of the second connector 41 includes, but is not limited to, a threaded connector, a pin, or a tenon.

[0065] In optional embodiments, the difference in shear strength between the second connector 41 and the first connector 13 can be achieved in various ways, including but not limited to making the cross-sectional dimension of the second connector 41 larger than that of the first connector 13, or using a material with higher shear strength than the first connector 13 on the second connector 41.

[0066] In an optional embodiment, a strip-shaped limiting block 32 is detachably connected to the lower support plate 3. The number and orientation of the strip-shaped limiting blocks 32 match the number and orientation of the first sliding groove 31. The bottom surface of the strip-shaped limiting block 32 is provided with a groove structure 321. The groove structure 321 of the strip-shaped limiting block 32 and the upper surface of the lower support plate 3 form the first sliding groove 31. The first sliding groove 31 opens to the side facing the corresponding arc-shaped connecting plate 4, and the dimension of the opening along the height direction is greater than the thickness of the arc-shaped connecting plate 4, but smaller than the dimension of the strip-shaped protrusion 42 along the height direction. Therefore, when the strip-shaped limiting block 32 is installed on the lower support plate 3 and the strip-shaped protrusion 42 is sandwiched between the groove structure 321 and the upper surface of the lower support plate 3, the strip-shaped protrusion 42 cannot detach from the first sliding groove 31 in a direction perpendicular to the length of the first sliding groove 31, thus having better pull-out resistance.

[0067] In the above embodiments, the detachable connection methods between the strip-shaped limiting block 32 and the lower support plate 3 include, but are not limited to, threaded connection, pin connection, tenon and mortise connection, or snap-fit ​​connection; for example Figure 5 As shown, the strip-shaped limiting block 32 is connected to the lower support plate 3 by countersunk screws 34.

[0068] In an optional embodiment, a stop structure 322 is provided at each end of the first slide groove 31 along its length. The stop structure 322 can be provided at various positions, for example, on the upper surface of the lower support plate 3, or as... Figure 7 As shown, it is integrated at both ends of the strip-shaped limiting block 32 along its length direction; the specific structural form of the stop structure 322 includes, but is not limited to, a stop block, a baffle, or a stepped surface.

[0069] In the above embodiments, such as Figures 5 to 6 As shown, the upper surface of the lower support plate 3 is also provided with mounting limit blocks 33. The number and position of the mounting limit blocks 33 are matched with the strip limit blocks 32, and the length of the mounting limit blocks 33 is matched with the spacing of the two stop structures 322 on the strip limit blocks 32. This allows the strip limit blocks 32 with stop structures 322 to be placed on the mounting limit blocks 33 by straddling them, thereby improving the positioning accuracy and installation efficiency of the strip limit blocks 32, as well as improving the connection reliability between the strip limit blocks 32 and the lower support plate 3.

[0070] In an optional embodiment, a strip groove 43 is provided on the arc-shaped connecting plate 4. The length of the strip groove 43 is set along the arc length direction of the arc-shaped connecting plate 4. That is, the strip groove 43 is set to fit the curved surface of the arc-shaped connecting plate 4 along the trajectory curve direction of the arc-shaped connecting plate 4. For example, for an arc-shaped connecting plate 4 whose projection on the YOZ plane is approximately C-shaped, the projection of its strip groove 43 on the YOZ plane is also approximately C-shaped.

[0071] In the above embodiments, the number of strip grooves 43 is at least two, and the strip grooves 43 are spaced apart along the generatrix direction of the arc-shaped connecting plate 4, for example... Figure 8 As shown.

[0072] In an optional embodiment, the upper support plate 12 is provided with limit blocks 121 at both ends along the transverse direction of the bridge, and a movable gap along the transverse direction is provided between the limit blocks 121 and the corresponding side wall of the lower support plate 3.

[0073] In the above embodiment, a steel strip 5 is provided on one of the side walls of the limiting block 121 and the lower support plate 3, and a wear-resistant strip 6 is provided at the corresponding position on the other of the limiting block 121 and the lower support plate 3. The lengths of both the steel strip 5 and the wear-resistant strip 6 are arranged along the longitudinal direction of the bridge. For example, the side wall of the limiting block 121 is provided with a steel strip 5, and the side wall of the lower support plate 3 is provided with a corresponding wear-resistant strip 6; or, the side wall of the limiting block 121 is provided with a wear-resistant strip 6, and the side wall of the lower support plate 3 is provided with a corresponding steel strip 5; the wear-resistant strip 6 can be an existing product, such as a polytetrafluoroethylene strip or a polyethylene strip.

[0074] In an optional embodiment, the top surface of the anchor plate 11 is provided with an anchor rod 7 for connection with the beam, and / or the bottom surface of the lower support plate 3 is provided with an anchor rod 7 for connection with the pier. For example Figures 1 to 3 As shown, at least two anchor rods 7 are respectively provided at intervals on the top surface of the anchor plate 11 and the bottom surface of the lower support plate 3.

[0075] In an optional embodiment, a flat wear-resistant plate is provided between the bottom surface of the upper support plate 12 and the top surface of the spherical crown liner 2 to reduce wear between the upper support plate 12 and the top surface of the spherical crown liner 2; the flat wear-resistant plate can be an existing product, such as a polytetrafluoroethylene plate or a polyethylene plate.

[0076] In an optional embodiment, a spherical wear-resistant plate is provided between the ball socket of the lower support plate 3 and the bottom surface of the spherical crown liner 2 to reduce wear between the lower support plate 3 and the bottom surface of the spherical crown liner 2; the spherical wear-resistant plate can be an existing product, such as a polytetrafluoroethylene arc panel or a polyethylene arc panel.

[0077] The above content is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A beam support for preventing beam fall, comprising an upper support plate (12), a movable joint, and a lower support plate (3) arranged sequentially along the height direction, characterized in that: An anchor plate (11) is provided on the side of the upper support plate (12) away from the lower support plate (3). The anchor plate (11) is connected to the upper support plate (12) through a first connector (13). The anchor plate (11) is used to connect with the beam. An arc-shaped connecting plate (4) is provided between the upper support plate (12) and the lower support plate (3). The upper end of the arc-shaped connecting plate (4) is connected to the anchor plate (11) through a second connector (41). The shear strength of the second connector (41) is greater than that of the first connector (13). A strip-shaped protrusion (42) is provided at the lower end of the arc-shaped connecting plate (4). The strip-shaped protrusion (42) is inserted into the first groove (31) on the lower support plate (3). An movable gap is provided between the strip-shaped protrusion (42) and the first groove (31) along both the longitudinal and transverse directions of the bridge. The number of the arc-shaped connecting plates (4) is at least one, and the busbar setting direction of the arc-shaped connecting plates (4) includes at least one of the transverse bridge direction and the longitudinal bridge direction; the number and setting direction of the first sliding grooves (31) match the number and setting direction of the arc-shaped connecting plates (4).

2. The anti-fall beam support according to claim 1, characterized in that, A strip-shaped limiting block (32) is detachably connected to the lower support plate (3). The number and setting direction of the strip-shaped limiting block (32) match the number and setting direction of the first slide groove (31). The bottom surface of the strip-shaped limiting block (32) is provided with a groove structure (321). The strip-shaped limiting block (32) and the lower support plate (3) enclose each other to form the first slide groove (31). The first slide groove (31) opens to the side facing the corresponding arc-shaped connecting plate (4).

3. The anti-fall beam support according to claim 1, characterized in that, The first chute (31) has stop structures (322) at both ends along its length.

4. The anti-fall beam support according to claim 1, characterized in that, The arc-shaped connecting plate (4) is provided with a strip groove (43), the length of which is set along the arc length direction of the arc-shaped connecting plate (4).

5. A beam-prevention support according to claim 4, characterized in that, The number of the strip grooves (43) is at least two, and the strip grooves (43) are distributed at intervals along the generatrix direction of the arc-shaped connecting plate (4).

6. A beam-prevention support according to any one of claims 1 to 5, characterized in that, The movable joint includes a ball cap liner (2) or a rubber plate.

7. A beam-prevention support according to any one of claims 1 to 5, characterized in that, The upper support plate (12) is provided with limit blocks (121) at both ends along the transverse direction of the bridge, and there is an movable gap between the limit blocks (121) and the corresponding side wall of the lower support plate (3).

8. A beam-prevention support according to claim 7, characterized in that, A steel strip (5) is provided on one of the limiting block (121) and the side wall of the lower support plate (3), and a wear-resistant strip (6) is provided at the corresponding position of the other of the limiting block (121) and the lower support plate (3). The lengths of the steel strip (5) and the wear-resistant strip (6) are both set along the longitudinal direction of the bridge.

9. A beam-prevention support according to any one of claims 1 to 5, characterized in that, The projection of the arc-shaped connecting plate (4) onto a plane perpendicular to its generatrix is ​​C-shaped.

10. A beam-prevention support according to any one of claims 1 to 5, characterized in that, An anchor rod (7) is provided on the top surface of the anchor plate (11), and / or an anchor rod (7) is provided on the bottom surface of the lower support plate (3).

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