Novel linear friction anti-beam-falling device and using method thereof

Abstract

The invention discloses a novel linear friction anti-beam-falling device and a using method thereof. The novel linear friction anti-beam-falling device comprises a first connecting base, a second connecting base and a friction limiting component. The first connecting seat and the second connecting seat are respectively arranged at proper positions of a bridge pier and a bridge superstructure, and the two ends of the friction limiting component are respectively and stably connected with the first connecting seat and the second connecting seat; the first connecting base and the friction limiting component are connected in a pin shaft connecting mode, and the connecting hole is arranged to be in a long hole shape to connect the first connecting base and the friction limiting component, so that when the bridge is structurally deformed due to temperature difference changes, the beam falling prevention device does not generate axial force to respond to the structural changes of the bridge; the joint of the first connecting base and the friction limiting component and the joint of the second connecting base and the friction limiting component are in multi-layer connection, the friction damper and the limiting component are connected in parallel through the friction limiting component, the friction surface and the friction area are increased under the condition that the installation difficulty is not increased, and the beam falling prevention function is enhanced.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge beam-falling prevention, and more specifically, relates to a novel linear friction beam-falling prevention device and a use method thereof. Background Art

[0002] Under the violent impact of an earthquake, the bridge structure will inevitably suffer from severe vibration. If this vibration is not controlled, it may cause serious displacement of the bridge superstructure and even cause the beam to fall, which will not only cause huge economic losses, but also have an adverse impact on social order. Therefore, in order to improve the seismic performance of the bridge and ensure its stability and safety under extreme conditions, it is particularly important to introduce an anti-beam falling device including a damper, which absorbs and dissipates vibration energy through the damper, effectively reduces the vibration response of the bridge structure, and prevents the beam from falling on the superstructure. According to the different working principles of the damper, it is mainly divided into metal dampers, viscoelastic dampers, viscous dampers, magnetorheological dampers, and friction dampers.

[0003] Among them, friction dampers play an important role in bridge seismic reinforcement with their clear working mechanism, simple structural design, strong energy dissipation capacity and adaptability to harsh environments. Friction dampers are displacement-related dampers, consisting of two outer constrained steel plates, an inner constrained steel plate and a friction material layer between them. When an earthquake occurs, the relative sliding between the friction material layers in contact with each other will generate friction, converting kinetic energy into heat energy, thereby achieving the purpose of shock absorption.

[0004] Although friction dampers are widely used in bridge shock absorption projects, there are still some problems with friction dampers in the prior art: (1) Bridges will deform due to temperature differences during service. Since friction dampers are displacement-related dampers, they will generate damping force to constrain deformation as the bridge deforms, thereby generating uneven stress inside the bridge and affecting the service life of the bridge structure; (2) Traditional friction dampers usually rely on increasing the number of friction surfaces to increase the friction area to increase friction, but too many friction surfaces will increase the number of internal constraining steel plates, complicating the overall structure and making it difficult to install the damper end and ear plate; (3) The anti-drop beam device using friction dampers prevents the failure of the bridge superstructure due to drop beams by consuming friction energy. However, when the seismic excitation is too large and the relative displacement of the bridge superstructure and the pier exceeds the design displacement limit of the damper, the damper steel member will yield and fail, resulting in a weak ultimate anti-drop beam force. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a novel linear friction anti-beam drop device and a method of using the same. The first connecting seat and the second connecting seat are respectively arranged at appropriate positions of the bridge pier and the bridge superstructure, and the two ends of the friction limiting component are respectively stably connected to the first connecting seat and the second connecting seat, thereby realizing the anti-beam drop function. The first connecting seat and the friction limiting component are connected by a pin shaft connection method and the connecting hole is set to a long hole shape, so that when the bridge undergoes structural deformation due to temperature difference changes, the anti-beam drop device will not generate an axial force to respond to the change of the bridge structure. Secondly, the connection between the first connecting seat and the second connecting seat and the friction limiting component is set to a multi-level connection, so that the friction surface and friction area are effectively increased without increasing the difficulty of installation, thereby increasing the friction force. In addition, the friction damper and the limiting component are connected in parallel through the friction limiting component, so that the friction damper consumes friction energy within the design stroke, and when the limit displacement state is reached, the limit anti-beam drop force is provided by the limiting component, thereby further improving the anti-beam drop capability and ensuring the safety of the bridge.

[0006] In order to achieve the above-mentioned object, the present invention provides a novel linear friction anti-falling beam device and a method of using the same, comprising: a first connecting seat, a second connecting seat and a friction limiting component, wherein:

[0007] The first connecting seat comprises a first supporting plate, a first ear plate, a first connecting member and a first pin shaft; the first supporting plate is connected to the bridge pier by fastening bolts; two first ear plates are horizontally fixed on one side of the first supporting plate and are mirror-symmetrical with the middle of the first supporting plate; one end of the first ear plate is semicircular, and a long hole-shaped connecting hole is horizontally extended and fixed at the center of the semicircular end to both ends; the first connecting member is connected to the two first ear plates by the first pin shaft;

[0008] The second connecting seat comprises a third supporting plate, a third ear plate, a second connecting member and a second pin shaft; the third supporting plate is connected to the bottom end of the bridge superstructure by fastening bolts; two third ear plates are horizontally fixed on one side of the third supporting plate and are mirror-symmetrical with the middle part of one side of the third supporting plate; the second connecting member is connected to the two third ear plates by the second pin shaft;

[0009] The friction limiting component comprises: a sliding plate, a friction plate, a third pin, a fourth pin and a pre-tightening component; the two sliding plates are respectively inserted between the three first side plates and connected to the three first side plates through the third pin; the three friction plates are respectively evenly arranged on both sides and between the two sliding plates and the two second side plates, and the friction plates are connected to the second side plates through the third pin. At the same time, the three friction plates are clamped with the two sliding plates through a plurality of pre-tightening components; a long strip-shaped limiting hole is fixedly provided in the middle of the friction plate, and the limiting hole is adapted to the fourth pin so that the fourth pin slides in a plurality of limiting holes at the same time; the friction damper and the limiting component are connected in parallel through the friction limiting component, and friction energy is consumed within the designed stroke. When the limit displacement state is reached, the limit anti-falling beam force is provided by the limiting component, thereby further improving the anti-falling beam capability.

[0010] Further, the first connecting member includes: a second supporting plate, a second ear plate and the first side plate; the second supporting plate is arranged in the middle of the first connecting member; the second ear plate is horizontally fixed in the middle of one side of the second supporting plate, one end of which is semicircular, and a through hole adapted to the first pin shaft is fixed at the center of the semicircular end; three first side plates are vertically and evenly fixed on the other side of the second supporting plate and are mirror-symmetrical with the middle of the second supporting plate, and at the same time, the three first side plates are spaced a certain distance apart, and two through holes are fixed on both sides of the middle of the first side plate.

[0011] Furthermore, strip rubber pads are fixedly provided at the upper end of the first ear plate at the lower side and on both sides of the connecting hole, and at the same time, an annular rubber pad is fixedly provided at the bottom end of the second ear plate and around the through hole.

[0012] Further, the second connecting member includes: a fourth support plate, a fourth ear plate and the second side plate; the fourth support plate is arranged in the middle of the second connecting member; the fourth ear plate is horizontally fixed in the middle of one side of the fourth support plate, one end of which is semicircular, and a through hole adapted to the second pin shaft is fixed at the center of the semicircular end; two second side plates are vertically and evenly fixed on the other side of the fourth support plate and are mirror-symmetrical with the middle of the fourth support plate, and at the same time, the two second side plates are spaced a certain distance apart, and two through holes are fixed on both sides of the middle of the second side plate.

[0013] Furthermore, an annular rubber pad is fixedly provided at the upper end of the third ear plate at the lower side and around the through hole, and at the same time, an annular rubber pad is fixedly provided at the bottom end of the fourth ear plate and around the through hole.

[0014] Furthermore, two through holes adapted to the third pin shaft are fixedly provided at appropriate positions on one end of the sliding plate, and a through hole adapted to the fourth pin shaft is fixedly provided at the other end, and the fourth pin shaft fits tightly with the through hole; stainless steel mirrors are fixedly provided at corresponding positions on both sides of the sliding plate.

[0015] Furthermore, friction accessories are provided at corresponding positions of the three friction plates contacting the stainless steel mirror surface on the outside of the sliding plate, and the friction accessories include a metal frame and a friction material; the metal frame is provided on the outside of the friction plate, and a plurality of square or circular assembly holes are fixedly provided in the middle thereof; the friction material is detachably provided in the assembly holes of the metal frame, and its thickness is greater than the height of the assembly holes.

[0016] Furthermore, two through holes adapted to the third pin shaft are fixedly provided at one end of the friction plate; and a plurality of corresponding through holes adapted to the pre-tightening component are fixedly provided at both sides of the other end of the friction plate.

[0017] Furthermore, the pre-tightening component includes: a gasket, a disc spring and a pre-tightening bolt; the gasket and the disc spring are tightly connected and a through hole adapted to the pre-tightening bolt is fixedly provided in the middle, and several groups of the gaskets and the disc springs are respectively arranged on one side of the friction structure composed of the three friction plates; the pre-tightening bolt passes through the gasket, the disc spring, the friction plate and the sliding plate to tightly connect the sliding plate and the friction plate, and the pre-tightening bolt is a contactless ultrasonic axial force measuring bolt; the distance between the screws of the corresponding pre-tightening bolts on both sides is greater than the width of the sliding plate, and a sleeve is provided on the outer side of the screws between the three friction plates.

[0018] Another aspect of the present invention provides a method for using a novel linear friction anti-falling beam device, which is implemented by using the anti-falling beam device as described above, and comprises the following steps:

[0019] S1: Check the structural stability of the first connecting seat, the second connecting seat and the friction limiter to ensure that they can be installed and used normally;

[0020] S2: The first connecting seat and the second connecting seat are respectively arranged at appropriate positions of the bridge pier and the bridge superstructure, and then the friction limit device is preassembled, and the two ends of the friction limit component are respectively connected to the first connecting seat and the second connecting seat through a plurality of third pins, so that the installation of the anti-falling beam device is completed;

[0021] S3: During the service life of the anti-falling beam device, when encountering a small or medium earthquake, the first connecting seat and the second connecting seat move relative to each other, so that the plurality of sliding plates and the plurality of friction plates move relative to each other along the limiting holes, and the vibration response of the bridge is reduced under the action of a large area of ​​friction material;

[0022] S4: When encountering a large-scale earthquake, the fourth pin in the limiting hole moves to the limit position, and the friction limiting component provides the limit bearing capacity;

[0023] S5: During the service period of the anti-drop beam device, the anti-drop beam device is monitored in real time through a plurality of pre-tightening bolts, and the wear degree of the friction material is checked on time to reduce the difficulty of maintenance.

[0024] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0025] 1. The anti-beam-dropping device of the present invention realizes the anti-beam-dropping function by arranging the first connecting seat and the second connecting seat at appropriate positions of the bridge pier and the bridge superstructure respectively, and stably connecting the first connecting seat and the second connecting seat at both ends of the friction limiting component respectively, wherein the first connecting seat and the friction limiting component are connected by a pin shaft connection method and the connecting hole is set as a long hole shape, so that when the bridge undergoes structural deformation due to temperature difference changes, the anti-beam-dropping device will not generate axial force to respond to the change of the bridge structure; secondly, by arranging the connection between the first connecting seat and the second connecting seat and the friction limiting component as a multi-level connection, the friction surface and friction area are effectively increased without increasing the difficulty of installation, thereby increasing the friction force; in addition, the friction damper and the limiting component are connected in parallel through the friction limiting component, so that the friction damper consumes friction energy within the design stroke, and when the limit displacement state is reached, the limit anti-beam-dropping force is provided by the limiting component, thereby further improving the anti-beam-dropping ability and ensuring the safety of the bridge.

[0026] 2. The anti-falling beam device of the present invention reduces possible collisions, enhances the safety of the anti-falling beam device, and increases the service life by arranging rubber pads on the outer sides of the first ear plate, the second ear plate, the third ear plate, and the fourth ear plate.

[0027] 3. The anti-beam-dropping device of the present invention is used to further improve the adaptability of the anti-beam-dropping device to high temperature and vibration, thereby increasing the practicality of the anti-beam-dropping device, by making the distance between the two first ear plates greater than the thickness of the second ear plates, and the distance between the two third ear plates greater than the thickness of the fourth ear plates.

[0028] 4. The anti-falling beam device of the present invention ensures that the pre-tightening bolts will not hinder the relative sliding of the sliding plate and the friction plate when applying the pre-tightening force, by making the distance between the screw rods of the corresponding pre-tightening bolts on both sides greater than the width of the sliding plate, and sleeves are provided on the outer sides of the screw rods between the three friction plates. At the same time, direct contact between the screw rod and the sliding plate is prevented to avoid friction damage and affect the service life of the anti-falling beam device.

[0029] 5. The anti-beam-dropping device of the present invention adds an extreme anti-beam-dropping function through the limiting hole and the fourth pin shaft without affecting the friction energy consumption of the anti-beam-dropping device. The structure is simple, easy to process and install, effectively saving manufacturing costs and facilitating practical engineering applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of a beam-falling prevention device according to an embodiment of the present invention;

[0031] Figure 2 It is a top view of the beam-falling prevention device according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic structural diagram of a first connecting socket according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic structural diagram of a second connecting socket according to an embodiment of the present invention;

[0034] Figure 5 It is a structural schematic diagram of a sliding plate according to an embodiment of the present invention;

[0035] Figure 6 It is a structural schematic diagram of a friction plate according to an embodiment of the present invention;

[0036] Figure 7 The present invention is a schematic diagram of the steps of using the beam-falling prevention device according to an embodiment of the present invention.

[0037] In all the accompanying drawings, the same figure marks represent the same technical features, specifically: 1-first connecting seat, 11-first support plate, 12-first ear plate, 13-first connecting piece, -second 131 support plate, 132-second ear plate, 133-first side plate, 14-first pin, 2-second connecting seat, 21-third support plate, 22-third ear plate, 23-second connecting piece, 231-fourth support plate, 232-fourth ear plate, 233-second side plate, 24-second pin, 3-friction limiting component, 31-sliding plate, 311-stainless steel mirror, 32-friction plate, 321-friction accessory, 3211-metal frame, 3212-friction material, 322-limiting hole, 33-third pin, 34-fourth pin, 35-pretightening component, 351-gasket, 352-disc spring, 353-pretightening bolt, 3531-sleeve. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] like Figures 1 to 6 As shown, an embodiment of the present invention provides a novel linear friction anti-beam drop device, comprising: a first connecting seat 1, a second connecting seat 2 and a friction limiting component 3; the first connecting seat 1 is arranged on one side of the pier; the second connecting seat 2 is arranged at the bottom end of the bridge superstructure; the friction limiting component 3 is arranged between the first connecting seat 1 and the second connecting seat 2; in the actual engineering application of the anti-beam drop device, the first connecting seat 1 and the second connecting seat 2 are respectively arranged at appropriate positions of the pier and the bridge superstructure, and the two ends of the friction limiting component 3 are respectively stably connected to the first connecting seat 1 and the second connecting seat 2, so as to achieve the anti-beam drop function, wherein the pin shaft connection is used and The connecting hole is set to be a long hole shape to connect the first connecting seat 1 and the friction limiting component 3, so that when the bridge undergoes structural deformation due to temperature difference changes, the anti-beam drop device will not generate axial force to respond to changes in the bridge structure. Secondly, by setting the connection between the first connecting seat 1 and the second connecting seat 2 and the friction limiting component 3 as a multi-level connection, the friction surface and friction area are effectively increased without increasing the difficulty of installation, thereby increasing the friction force. In addition, the friction damper and the limiting component are connected in parallel through the friction limiting component 3, so that the friction damper consumes friction energy within the design stroke, and relies on the limiting component to provide the ultimate anti-beam drop force when the limit displacement state is reached, thereby further improving the anti-beam drop capability and ensuring the safety of the bridge.

[0040] Specifically, Figures 1 to 3 As shown, the first connecting seat 1 is arranged on one side of the pier, and is used for stably connecting and supporting the friction limiting component 3, which includes: a first supporting plate 11, a first ear plate 12, a first connecting member 13 and a first pin shaft 14.

[0041] The first support plate 11 is connected to the bridge pier by fastening bolts to stably support other components.

[0042] The two first ear plates 12 are horizontally fixed on one side of the first support plate 11 and are mirror-symmetrical with the middle of the first support plate 11, and are used to connect other components.

[0043] Preferably, one end of the first ear plate 12 is semicircular, and a long hole-shaped connecting hole is fixedly provided at the center of the semicircular end horizontally extending to both ends, and the connecting hole is adapted to the first pin shaft 14 and allows the first pin shaft 14 to slide inside it.

[0044] The first connecting member 13 is connected to the two first ear plates 12 through the first pin shaft 14 for stably connecting the friction limiting component 3, which includes a second support plate 131 arranged in the middle thereof and a second ear plate 132 and a first side plate 133 respectively arranged on both sides of the second support plate 131.

[0045] Preferably, the second ear plate 132 is horizontally fixed at the middle of one side of the second support plate 131 , one end of which is semicircular, and a through hole adapted to the first pin shaft 14 is fixedly provided at the center of the semicircular end.

[0046] Preferably, a strip rubber pad is fixedly provided on the upper end of the first ear plate 12 on the lower side and on both sides of the connecting hole. At the same time, an annular rubber pad is fixedly provided on the bottom end of the second ear plate 132 and around the through hole, so as to reduce the contact between the first ear plate 12 and the second ear plate 132 on the lower side, thereby enhancing the safety of the anti-collision beam device and improving the service life.

[0047] Preferably, the three first side plates 133 are vertically and evenly fixed on the other side of the second support plate 131 and are mirror-symmetrical with the middle of the second support plate 131. At the same time, the three first side plates 133 are spaced a certain distance apart, and two through holes are fixed on both sides of the middle of the first side plate 133 for stably connecting the friction limiting component 3.

[0048] Specifically, Figure 1 , Figure 2 and Figure 4 As shown, the second connecting seat 2 is arranged at the bottom end of the bridge superstructure, and is used to stably connect and support the friction limiting component 3, which includes: a third support plate 21, a third ear plate 22, a second connecting member 23 and a second pin shaft 24.

[0049] The third support plate 21 is connected to the bottom end of the bridge superstructure by fastening bolts to stably support other components.

[0050] Preferably, the third support plate 21 is an L-shaped support plate and a rib is fixedly provided at the middle portion of the inner side thereof.

[0051] The two third ear plates 22 are horizontally fixed on one side of the third support plate 21 and are mirror-symmetrical with the middle part of one side of the third support plate 21, and are used to connect other components.

[0052] Preferably, one end of the third ear plate 22 is semicircular, and a through hole adapted to the second pin shaft 24 is fixedly provided at the center of the semicircular end.

[0053] The second connecting member 23 is connected to the two third ear plates 22 through the second pin shaft 24 for stably connecting the friction limiting component 3, which includes a fourth support plate 231 arranged in the middle thereof and a fourth ear plate 232 and a second side plate 233 respectively arranged on both sides of the fourth support plate 231.

[0054] Preferably, the fourth ear plate 232 is horizontally fixed at the middle of one side of the fourth support plate 231 , one end of which is semicircular, and a through hole adapted to the second pin shaft 24 is fixedly provided at the center of the semicircular end.

[0055] Preferably, an annular rubber pad is fixedly provided at the upper end of the third ear plate 22 on the lower side and around the through hole. At the same time, an annular rubber pad is fixedly provided at the bottom end of the fourth ear plate 232 and around the through hole, so as to reduce the contact between the third ear plate 22 and the fourth ear plate 232 on the lower side, enhance the safety of the anti-collision beam device, and improve the service life.

[0056] Preferably, the two second side plates 233 are vertically and evenly fixed on the other side of the fourth support plate 231 and are mirror-symmetrical with the middle of the fourth support plate 231. At the same time, the two second side plates 233 are spaced a certain distance apart, and two through holes are fixed on both sides of the middle of the second side plates 233 for stably connecting the friction limiting component 3.

[0057] Preferably, the distance between the two first ear plates 12 is greater than the thickness of the second ear plate 132, and the distance between the two third ear plates 22 is greater than the thickness of the fourth ear plate 232, so as to further improve the adaptability of the anti-beam drop device to high temperature and vibration and increase the practicality of the anti-beam drop device.

[0058] In an optional embodiment, rubber pads are fixed around the bottom ends of the first ear plate 12 and the third ear plate 22 on the upper side, the upper ends of the second ear plate 132 and the fourth ear plate 232, and each connecting hole to further mitigate possible collisions and ensure the safety of the anti-collision beam device.

[0059] Specifically, Figures 1 to 6 As shown, the friction limiting component 3 is arranged between the first connecting seat 1 and the second connecting seat 2, and is used to reduce the vibration of the bridge and realize the function of preventing the beam from falling. It includes: a sliding plate 31, a friction plate 32, a third pin shaft 33, a fourth pin shaft 34 and a pre-tightening component 35.

[0060] The two sliding plates 31 are respectively inserted between the three first side plates 133 and connected to the three first side plates 133 through the third pin shaft 33 .

[0061] Preferably, two through holes adapted to the third pin shaft 33 are fixedly provided at appropriate positions on one end of the sliding plate 31, so that when it is connected to the first side plate 133, it does not contact the second support plate 131; a through hole adapted to the fourth pin shaft 34 is fixedly provided on the other end of the sliding plate 31, and the fourth pin shaft 34 is tightly fitted with the through hole.

[0062] In an optional embodiment, an external thread is fixedly provided on the outer side of the fourth pin shaft 34, and an internal thread that is adapted to the external thread is fixedly provided on the through hole of the sliding plate 31 and the fourth pin shaft 34, so that the fourth pin shaft 34 and the sliding plate 31 can achieve a convenient and detachable close fit, reducing the difficulty of assembly and maintenance.

[0063] Preferably, stainless steel mirror surfaces 311 are fixedly provided at corresponding positions on both sides of the sliding plate 31, so as to reduce the degree of wear of friction components in the friction plate 32, increase service life and reduce maintenance costs while meeting the friction energy consumption requirements.

[0064] The three friction plates 32 are evenly arranged on both sides and between the two sliding plates 31 and the two second side plates 233, and are used to form a friction damping structure with the sliding plates 31 to reduce bridge vibration and achieve the function of preventing beams from falling.

[0065] Preferably, two through holes adapted to the third pin shaft 33 are fixedly provided at one end of the friction plate 32 , and the friction plate 32 is connected to the second side plate 233 via the third pin shaft 33 .

[0066] Preferably, a plurality of through holes corresponding to and adapted to the pre-tightening components 35 are fixedly provided on both sides of the other end of the friction plate 32 , so that the three friction plates 32 can clamp the two sliding plates 31 through the pre-tightening components 35 .

[0067] Preferably, friction fittings 321 are provided at corresponding positions of the three friction plates 32 contacting the stainless steel mirror surface 311 on the outer side of the sliding plate 31 .

[0068] The friction accessory 321 includes a metal frame 3211 and a friction material 3212 .

[0069] The metal frame 3211 is arranged on the outside of the friction plate 32, and a plurality of square or circular assembly holes are fixedly arranged in the middle thereof;

[0070] The friction material 3212 is detachably mounted on the assembly hole of the metal frame 3211 , and its thickness is greater than the height of the assembly hole, so as to reduce maintenance costs.

[0071] Preferably, a long strip-shaped limiting hole 322 is fixedly provided in the middle of the friction plate 32 , and the limiting hole 322 is adapted to the fourth pin shaft 34 , so that the fourth pin shaft 34 slides in a plurality of the limiting holes 322 at the same time.

[0072] Preferably, both ends of the limiting hole 322 are close to the second side plate 233 and the friction accessory 321 , and the fourth pin shaft 34 does not collide with the second side plate 233 and the friction accessory 321 when sliding inside the limiting hole 322 .

[0073] The pre-tightening component 35 includes a gasket 351 , a disc spring 352 and a pre-tightening bolt 353 .

[0074] The gasket 351 and the disc spring 352 are tightly connected and a through hole adapted to the pre-tightening bolt 353 is fixedly provided in the middle. Several groups of the gasket 351 and the disc spring 352 are respectively arranged on one side of the friction structure composed of the three friction plates 32, so as to make the pre-tightening force of the pre-tightening bolt 353 evenly applied to the friction plate 32.

[0075] Preferably, the pre-tightening bolt 353 passes through the gasket 351 , the disc spring 352 , the friction plate 32 and the sliding plate 31 to tightly connect the sliding plate 31 and the friction plate 32 .

[0076] Preferably, the pre-tightening bolt 353 is a contactless ultrasonic axial force measuring bolt, which is used to provide real-time feedback on its working performance and can provide a scientific basis for the maintenance of the friction damper.

[0077] Preferably, the distance between the screw rods of the corresponding pre-tightening bolts 353 on both sides is greater than the width of the sliding plate 31, and a sleeve 3531 is provided on the outer side of the screw rods between the three friction plates 32 to ensure that the pre-tightening bolts 353 do not hinder the relative sliding of the sliding plate 31 and the friction plate 32 when the pre-tightening force is applied, and at the same time, prevent the screw rod from directly contacting the sliding plate 31, avoiding friction damage and affecting the life of the anti-drop beam device.

[0078] Preferably, the sleeve 3531 is mainly made of materials such as brass or polyester.

[0079] like Figure 7 As shown, another embodiment of the present invention provides a method for using a novel linear friction anti-falling beam device, comprising the following steps:

[0080] S1: Check the structural stability of the first connecting seat 1, the second connecting seat 2 and the friction limiting component 3 to ensure that they can be installed and used normally;

[0081] S2: The first connecting seat 1 and the second connecting seat 2 are respectively arranged at appropriate positions of the bridge pier and the bridge superstructure, and then the friction limit device 3 is preassembled, and the two ends of the friction limit component 3 are respectively connected to the first connecting seat 1 and the second connecting seat 2 through a plurality of third pins 33, so that the installation of the anti-falling beam device is completed;

[0082] S3: During the service life of the anti-falling beam device, when encountering a small or medium earthquake, the first connecting seat 1 and the second connecting seat 2 move relative to each other, so that the plurality of sliding plates 31 and the plurality of friction plates 32 move relative to each other along the limiting holes 322, and the vibration response of the bridge is reduced under the action of the large-area friction material 3212;

[0083] S4: When encountering a large earthquake, the fourth pin 34 in the limiting hole 322 moves to the limit position, and the friction limiting component 3 provides the limit bearing capacity;

[0084] S5: During the service period of the anti-beam drop device, the anti-beam drop device is monitored in real time through a plurality of pre-tightening bolts 353, and the wear degree of the friction material 3212 is checked on time to reduce the difficulty of maintenance.

[0085] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0086] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0087] In this patent, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "includes..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Those skilled in the art will readily understand that the above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A novel linear friction anti-beam falling device, characterized in that: include: A first connecting seat (1), a second connecting seat (2) and a friction limiting component (3), wherein: The first connecting seat (1) comprises a first supporting plate (11), a first ear plate (12), a first connecting piece (13) and a first pin shaft (14); the first supporting plate (11) is connected to the bridge pier by fastening bolts; the two first ear plates (12) are horizontally fixed on one side of the first supporting plate (11) and are mirror-symmetrical with the middle of the first supporting plate (11); one end of the first ear plate (12) is semicircular, and a long hole-shaped connecting hole is fixedly provided at the center of the semicircular end horizontally extending to both ends; the first connecting piece (13) is connected to the two first ear plates (12) by the first pin shaft (14); The second connecting seat (2) comprises a third supporting plate (21), a third ear plate (22), a second connecting member (23) and a second pin shaft (24); the third supporting plate (21) is connected to the bottom end of the bridge superstructure by fastening bolts; the two third ear plates (22) are horizontally fixed on one side of the third supporting plate (21) and are mirror-symmetrical with the middle part of one side of the third supporting plate (21); the second connecting member (23) is connected to the two third ear plates (22) by the second pin shaft (24); The friction limiting component (3) comprises: a sliding plate (31), a friction plate (32), a third pin shaft (33), a fourth pin shaft (34) and a pre-tightening component (35); the two sliding plates (31) are respectively inserted between the three first side plates (133) and connected to the three first side plates (133) through the third pin shaft (33); the three friction plates (32) are respectively evenly arranged on both sides and between the two sliding plates (31) and the two second side plates (233), and the friction plates (32) are connected to the second side plates (233) through the third pin shaft (33). At the same time, the three friction plates (32) are clamped with the two sliding plates (31) by means of a plurality of pre-tightening components (35); a long strip-shaped limiting hole (322) is fixedly provided in the middle of the friction plate (32), and the limiting hole (322) is adapted to the fourth pin shaft (34), so that the fourth pin shaft (34) slides in the plurality of limiting holes (322) at the same time; the friction damper and the limiting component are connected in parallel by means of the friction limiting component (3), and friction energy is consumed within the designed stroke. When the limit displacement state is reached, the limit anti-beam drop force is provided by the limiting component, thereby further improving the anti-beam drop capability.

2. The anti-falling beam device according to claim 1, characterized in that: The first connecting member (13) comprises: a second supporting plate (131), a second ear plate (132) and the first side plate (133); the second supporting plate (131) is arranged in the middle of the first connecting member (13); the second ear plate (132) is horizontally fixedly arranged in the middle of one side of the second supporting plate (131), one end of which is semicircular, and a through hole adapted to the first pin shaft (14) is fixedly arranged at the center of the semicircular end; three first side plates (133) are vertically and evenly fixedly arranged on the other side of the second supporting plate (131) and are mirror-symmetrical with the middle of the second supporting plate (131), and at the same time, the three first side plates (133) are spaced a certain distance apart, and two through holes are fixedly arranged on both sides of the middle of the first side plate (133).

3. The anti-falling beam device according to claim 2, characterized in that: A strip rubber pad is fixedly provided at the upper end of the first ear plate (12) on the lower side and on both sides of the connecting hole, and an annular rubber pad is fixedly provided at the bottom end of the second ear plate (132) and around the through hole.

4. The anti-falling beam device according to claim 1, characterized in that: The second connecting member (23) comprises: a fourth supporting plate (231), a fourth ear plate (232) and the second side plate (233); the fourth supporting plate (231) is arranged in the middle of the second connecting member (23); the fourth ear plate (232) is horizontally fixedly arranged in the middle of one side of the fourth supporting plate (231), one end of which is semicircular, and a through hole adapted to the second pin shaft (24) is fixedly arranged at the center of the semicircular end; two second side plates (233) are vertically and evenly fixedly arranged on the other side of the fourth supporting plate (231) and are mirror-symmetrical with the middle of the fourth supporting plate (231), and at the same time, the two second side plates (233) are spaced a certain distance apart, and two through holes are fixedly arranged on both sides of the middle of the second side plate (233).

5. The beam-falling prevention device according to claim 4, characterized in that: An annular rubber pad is fixedly provided at the upper end of the third ear plate (22) at the lower side and around the through hole, and at the same time, an annular rubber pad is fixedly provided at the bottom end of the fourth ear plate (232) and around the through hole.

6. The beam-falling prevention device according to any one of claims 1 to 5, characterized in that: Two through holes adapted to the third pin shaft (33) are fixedly provided at appropriate positions on one end of the sliding plate (31), and a through hole adapted to the fourth pin shaft (34) is fixedly provided at the other end, and the fourth pin shaft (34) is tightly matched with the through hole; stainless steel mirror surfaces (311) are fixedly provided at corresponding positions on both sides of the sliding plate (31).

7. The beam-falling prevention device according to claim 6, characterized in that: Friction accessories (321) are provided at corresponding positions of the three friction plates (32) contacting the stainless steel mirror surface (311) on the outside of the sliding plate (31), and the friction accessories (321) include a metal frame (3211) and a friction material (3212); the metal frame (3211) is provided on the outside of the friction plate (32), and a plurality of square or circular assembly holes are fixedly provided in the middle thereof; the friction material (3212) is detachably provided in the assembly hole of the metal frame (3211), and its thickness is greater than the height of the assembly hole.

8. The beam-falling prevention device according to any one of claims 1 to 5, characterized in that: Two through holes adapted to the third pin shaft (33) are fixedly provided at one end of the friction plate (32); and a plurality of corresponding through holes adapted to the pre-tightening component (35) are fixedly provided at both sides of the other end of the friction plate (32).

9. The beam-falling prevention device according to claim 8, characterized in that: The pre-tightening component (35) includes: a gasket (351), a disc spring (352) and a pre-tightening bolt (353); the gasket (351) and the disc spring (352) are tightly connected and a through hole adapted to the pre-tightening bolt (353) is fixedly provided in the middle of the gasket (351) and the disc spring (352), and a plurality of groups of the gaskets (351) and the disc spring (352) are respectively arranged on one side of the friction structure composed of the three friction plates (32); the pre-tightening bolt (353) passes through the gasket (351), the disc spring (352), the friction plate (32) and the sliding plate (31) so that the sliding plate (31) and the friction plate (32) are tightly connected, and the pre-tightening bolt (353) is a non-contact ultrasonic axial force measuring bolt; the distance between the screws of the corresponding pre-tightening bolts (353) on both sides is greater than the width of the sliding plate (31), and a sleeve (3531) is sleeved on the outer side of the screw between the three friction plates (32).

10. A method for using a novel linear friction anti-falling beam device, which is implemented by using the anti-falling beam device according to any one of claims 1 to 9, characterized in that: The steps include: S1: Check the structural stability of the first connecting seat (1), the second connecting seat (2) and the friction limiting component (3) to ensure that they can be installed and used normally; S2: The first connecting seat (1) and the second connecting seat (2) are respectively arranged at appropriate positions of the bridge pier and the bridge superstructure, and then the friction limit device (3) is preassembled, and the two ends of the friction limit component (3) are respectively connected to the first connecting seat (1) and the second connecting seat (2) through a plurality of third pins (33), thereby completing the installation of the anti-falling beam device; S3: During the service life of the anti-falling beam device, when encountering a small or medium earthquake, the first connecting seat (1) and the second connecting seat (2) move relative to each other, so that the plurality of sliding plates (31) and the plurality of friction plates (32) move relative to each other along the limiting holes (322), and the vibration response of the bridge is reduced under the action of the large-area friction material (3212); S4: When a large earthquake occurs, the fourth pin (34) in the limiting hole (322) moves to the limit position, and the friction limiting component (3) provides the limit bearing capacity; S5: During the service life of the anti-falling beam device, the anti-falling beam device is monitored in real time through a plurality of pre-tightening bolts (353), and the wear degree of the friction material (3212) is checked on time, thereby reducing the difficulty of maintenance.

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