CN112227184A

CN112227184A - Anti-falling beam shock isolation device convenient for seismic resistance of bridge

Info

Publication number: CN112227184A
Application number: CN202011314364.9A
Authority: CN
Inventors: 孔虎; 李旺; 李玉辉
Original assignee: Wenzhou Shunqi Construction Co ltd
Current assignee: Wenzhou Shunqi Construction Co ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-01-15

Abstract

The invention belongs to the field of bridges, and particularly relates to a beam falling prevention and shock isolation device convenient for bridge shock resistance, wherein the top end of a support column is connected in a support cover in a sliding manner and extends to the upper part of the support cover, two threaded pipes are symmetrically and rotatably connected in a mounting groove at one side of the support column, the thread directions of the two threaded columns in the threaded pipes are opposite, two sliding holes are symmetrically formed in a support plate, two positioning grooves are symmetrically formed in the bottom part of a bridge plate, the top ends of the two threaded columns respectively extend into the two sliding holes and are respectively fixedly provided with positioning columns, the top ends of the two positioning columns respectively extend into the two positioning grooves and are respectively clamped with the two positioning grooves, the two positioning columns are respectively in sliding connection with the two sliding holes, a threaded connecting screw rod at one side of the support plate is respectively in transmission connection with the two threaded pipes, clamping plates are, the two clamping plates are in transmission connection with the screw, and the bridge plate can be stably and quickly installed and can be subjected to three-level shock absorption.

Description

Anti-falling beam shock isolation device convenient for seismic resistance of bridge

Technical Field

The invention belongs to the technical field of bridges, and relates to a beam falling prevention and shock isolation device convenient for bridge shock resistance.

Background

In recent years, with the rapid development of bridges and construction engineering in China, various novel structural forms and functional construction engineering are continuously developed, China provides a special mission for the bridge engineering, 5.12 Wenchuan earthquake causes huge loss, infrastructure near Wenchuan is seriously damaged, the bridge is seriously damaged, wherein the falling beam damage, collision between beam bodies and block damage are main forms for causing the bridge damage to block traffic, and the shock absorption and isolation and beam falling prevention device is required to be arranged.

At present, most of bridge anti-falling devices are arranged on a bearing platform, anti-collision stop blocks distributed in the transverse bridge direction are matched with longitudinal bridge upward anti-falling devices to achieve the purpose of preventing the beams from falling, but at present, after the anti-collision stop blocks are installed on a beam body, the buffering and damping performance of the anti-collision stop blocks is not ideal enough, so that the anti-falling beam shock isolation device convenient for the anti-seismic of the bridge is provided, and the anti-falling beam shock isolation device is used for solving the problem.

Disclosure of Invention

In view of the above, the invention provides a beam falling prevention and shock insulation device convenient for bridge shock resistance, which aims to solve the problem that after an anti-collision stop block is installed on a beam body, the buffering and shock insulation performance of the beam body is often not ideal enough.

In order to achieve the purpose, the invention provides the following technical scheme: a beam falling prevention and shock isolation device convenient for bridge shock resistance comprises a support cover, wherein a support column is connected in the support cover in a sliding mode, the top end of the support column extends to the upper portion of the support cover and is fixedly provided with a bearing plate, a bridge plate is arranged at the top of the bearing plate, a mounting groove is formed in one side of the support column, two threaded pipes are symmetrically and rotatably connected in the mounting groove, threaded columns are connected in the threaded pipes in a threaded mode, the directions of threads on the two threaded columns are opposite, two sliding holes are symmetrically formed in the bearing plate, two positioning grooves are symmetrically formed in the bottom of the bridge plate, the top ends of the two threaded columns respectively extend into the two sliding holes and are fixedly provided with positioning columns, the top ends of the two positioning columns respectively extend into the two positioning grooves and are respectively clamped with the two positioning grooves, the two positioning columns are respectively in sliding connection with the two sliding holes, and the screw rod is respectively in transmission connection with the two threaded pipes, the two sides of the bearing plate are both connected with clamping plates in a sliding manner, the two clamping plates are both clamped with the bridge plate, and the two clamping plates are both in transmission connection with the screw rod.

The beneficial effect of this basic scheme lies in: the bridge plate damping device can realize stable and quick installation of the bridge plate, is favorable for accelerating bridge construction, and can realize three-level damping of the bridge plate after the installation of the bridge plate is finished, so that effective buffering protection can be provided for the bridge plate, and the damage of the bridge plate can be further prevented.

Further, fixed cover is equipped with the gear on the screwed pipe, and sliding connection has the two-sided rack that is located between two screwed pipes on the bottom inner wall of mounting groove, two-sided rack meshes with two gears respectively mutually, and the one end of two-sided rack extends to the outside of support column and rotates with the one end of screw rod to be connected beneficial effect: remove through two-sided rack and can drive two screwed pipes and rotate, further can drive two reference columns and carry out longitudinal motion.

Further, bottom one side fixed mounting of bearing board has the thread plate, and the screw rod run through the thread plate and with thread plate threaded connection, beneficial effect: the threaded connection between the screw and the bearing plate can be realized, so that the double-sided rack can be driven to move when the screw is rotated.

Further, the draw-in groove has all been seted up to the bottom both sides of bridge plate, and in the top of two splint extended to two draw-in grooves respectively, the impartial interval fixed mounting in one side top that two splint are close to each other had a plurality of cardboards, and impartial interval has seted up a plurality of fixed slots on the one side inner wall that two draw-in grooves are close to each other, and one side of a plurality of cardboards extends respectively in a plurality of fixed slots and clamps beneficial effect with a plurality of fixed slots respectively mutually: the bridge plate can be positioned and clamped.

Further, the bottom symmetry of bearing board is rotated and is connected with two installation axles, and two installation epaxial equal fixed mounting have a dwang, the both ends of dwang are connected with splint and screw drive that lie in same one side respectively, beneficial effect: the screw rod and the two clamping plates can be driven.

Further, the equal fixed mounting in bottom of two splint has the connecting plate, and one side sliding connection of connecting plate has the go-between, and the one end that two dwang were kept away from each other rotates with two go-between respectively to be connected, rotate on the screw rod and overlap and be equipped with the connecting pipe, and symmetrical sliding connection has two carriage release levers in the connecting pipe, and the one end that two carriage release levers were kept away from each other extends to the both sides of connecting pipe respectively and rotates with the one end that two dwang are close to each other respectively and be connected beneficial effect: when the screw rod moves transversely, the two clamping plates are driven to approach or separate from each other.

Further, the bottom fixed mounting of support column has the backup pad, and backup pad and the inner wall sliding connection who supports the cover, symmetry fixed mounting has two elastic steel plates that are the slope setting on the bottom inner wall of support cover, and two elastic steel plate's top contacts with the both sides inner wall that supports the cover respectively, the backup pad is connected beneficial effect with two elastic steel plate transmissions: the bridge plate can be elastically supported.

Further, the bottom fixed mounting of backup pad has the bearing post, the bottom fixed mounting of bearing post has the buffer tube, and the intraductal symmetry sliding connection of buffer has two buffering posts, and the one end that two buffering posts kept away from each other all extends to in supporting the cover and respectively with two elastic steel board swing joint, the cover is equipped with the buffer spring who is located connecting pipe one side on the buffering post, and buffer spring's both ends respectively with the one end of buffering post and the one end fixed connection of connecting pipe, beneficial effect: when the bridge plate is pressed down, the two buffer columns are close to each other, so that the two buffer springs are in a stressed state.

Further, the one end that two bumping posts kept away from each other all rotates and is connected with the gyro wheel, and two gyro wheels respectively with two elastic steel plate activity rolling contact, beneficial effect: it is convenient to move the lever with a downward force.

Further, one side that two elastic steel plate kept away from each other all rotates and is connected with U type pole, and sliding sleeve is equipped with two buffering covers on the U type pole, the bottom of four buffering covers all with the bottom inner wall sliding connection who supports the cover, fixed mounting has supporting spring on the bottom inner wall of buffering cover, supporting spring's top and the bottom fixed connection of U type pole, beneficial effect: the multistage damping to the bridge plate can be realized to this protection bridge plate that can be better.

The invention has the beneficial effects that:

1. the invention discloses a girder falling-proof shock isolation device convenient for bridge shock resistance, which is characterized in that a bridge plate is placed on a bearing plate, then a screw rod can be rotated, so that the screw rod moves to one side far away from a support column, a double-sided rack can be pulled to move transversely, when the double-sided rack moves, two threaded pipes can be simultaneously driven to rotate through two gears, at the moment, under the action of a thread principle, a threaded column can move upwards, two positioning columns can be respectively pushed into two positioning grooves, the bridge plate can be positioned, when the screw rod moves, a connecting pipe can be driven to move transversely, two rotating rods can be respectively driven to rotate through the two moving rods, when the rotating rods rotate, two connecting plates can be pulled to be close to each other, so that the two clamping plates can be close to each other, after the positioning columns enter the positioning grooves, the clamping plates can move into the fixing grooves respectively, and the bridge plate can be clamped;

after the bridge plate is arranged on the bearing plate, the bearing plate can be pressed downwards by the gravity of the bridge plate at the moment, so that the bearing plate is displaced downwards, when the supporting plate moves downwards, the supporting plate can be driven by the supporting column to move downwards, at the moment, the two rollers roll downwards, and the two elastic steel plates are obliquely arranged, therefore, when the roller moves downwards, the two buffer columns can be pushed to be close to each other, at the same time, the two buffer springs are in a stressed state to realize the primary shock absorption of the bridge plate, and the elastic steel plate can deform downwards after being stressed, so the self elasticity of the elastic steel plate can absorb the shock again to the bridge plate, when the elastic steel plate deforms downwards, the U-shaped rod can be displaced downwards, so that the four supporting springs are in a stressed state at the same time, and three-level shock absorption on the bridge plate can be realized.

2. The anti-falling beam shock isolation device convenient for bridge shock resistance can realize stable and rapid installation of the bridge plate, thereby being beneficial to accelerating bridge construction, and can realize three-level shock absorption of the bridge plate after the bridge plate is installed, so that effective buffering protection can be provided for the bridge plate, and further the damage of the bridge plate can be prevented.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a front view of the structure of the anti-falling beam vibration isolation device for facilitating the anti-seismic of a bridge;

FIG. 2 is a schematic view of the structure of part A of FIG. 1 according to the present invention;

FIG. 3 is a bottom view of a connection structure of a screw and two connecting plates in the anti-falling beam shock isolation device convenient for bridge shock resistance;

FIG. 4 is a front view of a connection structure of two positioning pins and a bridge plate in the anti-falling beam shock isolation device convenient for bridge shock resistance;

FIG. 5 is a side view of a connection structure of two buffer covers, a U-shaped rod and an elastic steel plate in the anti-beam-falling shock isolation device convenient for bridge shock resistance.

Reference numerals: the supporting device comprises a supporting cover 1, a supporting plate 2, a supporting column 3, a supporting plate 4, a bridge plate 5, a clamping plate 6, a clamping groove 7, a connecting pipe 8, a supporting column 9, a buffer pipe 10, an elastic steel plate 11, a buffer cover 12, a buffer column 13, a buffer spring 14, a roller 15, a screw rod 16, a threaded plate 17, a double-sided rack 18, a moving rod 19, a mounting shaft 20, a rotating rod 21, a connecting ring 22, a connecting plate 23, a threaded pipe 24, a gear 25, a threaded column 26, a positioning column 27, a U-shaped rod 28 and a supporting spring 29.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.

1-5, including supporting cover 1, sliding connection has support column 3 in supporting cover 1, and the top of support column 3 extends to the top of supporting cover 1 and fixed mounting has bearing board 4, and the top of bearing board 4 is equipped with bridge plate 5, and the mounting groove has been seted up to one side of support column 3, and the symmetrical rotation is connected with two screwed pipes 24 in the mounting groove, and screwed pipe 24 female connection has threaded column 26, and the screw thread opposite direction on two threaded column 26.

Two sliding holes are symmetrically arranged on the bearing plate 4, two positioning grooves are symmetrically arranged at the bottom of the bridge plate 5, the top ends of two threaded columns 26 respectively extend into the two sliding holes and are fixedly provided with positioning columns 27, the top ends of the two positioning columns 27 respectively extend into the two positioning grooves and are respectively clamped with the two positioning grooves, the two positioning columns 27 are respectively connected with the two sliding holes in a sliding manner, one side of the bearing plate 4 is connected with a screw 16 in a threaded manner, the screw 16 is respectively connected with two threaded pipes 24 in a transmission manner, two sides of the bearing plate 4 are respectively connected with clamping plates 6 in a sliding manner, the two clamping plates 6 are respectively clamped with the bridge plate 5, the two clamping plates 6 are respectively connected with the screw 16 in a transmission manner, gears 25 are fixedly sleeved on the threaded pipes 24, the inner wall at the bottom of the mounting groove is connected with double-sided racks 18 positioned between the two threaded pipes 24 in a sliding manner, and one end of the double-sided rack 18 extends to the outer side of the supporting column 3 and is rotatably connected with one end of the screw 16, two threaded pipes 24 can be driven to rotate by moving the double-sided rack 18, and further two positioning columns 27 can be driven to move longitudinally, a threaded plate 17 is fixedly arranged on one side of the bottom of the supporting plate 4, the screw 16 penetrates through the threaded plate 17 and is in threaded connection with the threaded plate 17, and the threaded connection between the screw 16 and the supporting plate 4 can be realized, so that the double-sided rack 18 can be driven to move when the screw 16 is rotated, the clamping grooves 7 are respectively arranged on two sides of the bottom of the bridge plate 5, the top parts of the two clamping plates 6 respectively extend into the two clamping grooves 7, a plurality of clamping plates are fixedly arranged on the top parts of the mutually close sides of the two clamping plates 6 at equal intervals, a plurality of fixing grooves are arranged on the mutually close sides of the inner walls of the two clamping grooves 7 at equal intervals, one sides of the, the bridge plate 5 can be positioned and clamped.

The bottom of the bearing plate 4 is symmetrically and rotatably connected with two mounting shafts 20, the two mounting shafts 20 are both fixedly provided with rotating rods 21, two ends of each rotating rod 21 are respectively in transmission connection with the clamping plate 6 and the screw 16 which are positioned on the same side, the screw 16 can be driven by the two clamping plates 6, the bottom parts of the two clamping plates 6 are both fixedly provided with a connecting plate 23, and one side of the connecting plate 23 is slidably connected with a connecting ring 22, the ends of the two rotating rods 21 far away from each other are respectively rotatably connected with the two connecting rings 22, the screw 16 is rotatably sleeved with a connecting pipe 8, and two moving rods 19 are symmetrically and slidably connected in the connecting pipe 8, the ends of the two moving rods 19 far away from each other respectively extend to the two sides of the connecting pipe 8 and are respectively and rotatably connected with the ends of the two rotating rods 21 close to each other, the two clamping plates 6 can be moved towards or away from each other when the screw 16 is moved laterally.

In this embodiment, a supporting plate 2 is fixedly installed at the bottom end of a supporting column 3, the supporting plate 2 is slidably connected with the inner wall of a supporting cover 1, two elastic steel plates 11 are symmetrically and fixedly installed on the inner wall of the bottom of the supporting cover 1, the tops of the two elastic steel plates 11 are respectively contacted with the inner walls of the two sides of the supporting cover 1, the supporting plate 2 is in transmission connection with the two elastic steel plates 11, so as to elastically support a bridge plate 5, a supporting column 9 is fixedly installed at the bottom of the supporting plate 2, a buffer tube 10 is fixedly installed at the bottom end of the supporting column 9, two buffer columns 13 are symmetrically and slidably connected in the buffer tube 10, the mutually distant ends of the two buffer columns 13 extend into the supporting cover 1 and are respectively in movable contact with the two elastic steel plates 11, a buffer spring 14 located on one side of a connecting tube 8 is sleeved on the buffer column 13, and the two ends of the buffer spring 14 are respectively, the two cushion columns 13 can be brought close to each other when the bridge plate 5 is pressed down, so that the two cushion springs 14 are put in a stressed state.

The one end that two buffering posts 13 kept away from each other all rotates and is connected with gyro wheel 15, and two gyro wheels 15 respectively with two elastic steel plate 11 activity rolling contact, can make things convenient for carriage release lever 19 to have two elastic steel plate 11 one side of keeping away from each other of decurrent power and all rotate and be connected with U type pole 28, and sliding sleeve is equipped with two buffering covers 12 on the U type pole 28, the bottom of four buffering covers 12 all with the bottom inner wall sliding connection who supports cover 1, fixed mounting has supporting spring 29 on the bottom inner wall of buffering cover 12, supporting spring 29's top and U type pole 28's bottom fixed connection, can realize the multistage shock attenuation to bridge plate 5, with this protection bridge plate 5 that can be better.

This be convenient for bridge antidetonation prevent roof beam shock isolation device that falls, this technical scheme is through placing bridge plate 5 on bearing board 4, later rotatable screw rod 16, make screw rod 16 remove to the one side of keeping away from support column 3, can pull double-sided rack 18 with this and carry out lateral shifting, when double-sided rack 18 removes, two gears 25 of accessible drive two screwed pipes 24 simultaneously and rotate, at this moment under the effect of screw thread principle, can make the screw thread post 26 upwards remove, can push two reference columns 27 respectively to two constant head tanks in, the realization is fixed a position bridge plate 5, and when screw rod 16 removes, can drive connecting pipe 8 and carry out lateral shifting, can drive two dwang 21 respectively through two movable rods 19 and rotate.

When the rotating rod 21 rotates, the two connecting plates 23 can be pulled to approach each other, so that the two clamping plates 6 can approach each other, after the positioning column 27 enters the positioning groove, the plurality of clamping plates can be moved into the plurality of fixing grooves respectively, so that the clamping of the bridge plate 5 can be realized, after the bridge plate 5 is installed on the bearing plate 4, at this time, the gravity of the bridge plate 5 can press the bearing plate 4 downwards, so that the bearing plate 4 is displaced downwards, when the bearing plate 4 moves downwards, the supporting plate 2 can be driven by the supporting column 3 to move downwards, at this time, the two rollers 15 can roll downwards, and the two elastic steel plates 11 are arranged in an inclined manner, so that when the rollers 15 move downwards, the two buffer columns 13 can be pushed to approach each other, at this time, the two buffer springs 14 can be in a stressed state at the same time, so that the shock absorption of the bridge plate 5 is realized, and the elastic steel plates 11 are subjected to pressure, can take place deformation downwards, so the elasticity of elastic steel plate 11 self, can carry out the shock attenuation to bridge plate 5 once more, when elastic steel plate 11 is deformation downwards, can make U type pole 28 take place the displacement downwards, with this can make four supporting spring 29 be in the stress state simultaneously, so can realize the tertiary shock attenuation to bridge plate 5, this technical scheme can realize stabilizing quick installation to bridge plate 5, with this help accelerating the bridge construction, and after 5 installations to bridge plate are accomplished, can realize the tertiary shock attenuation to bridge plate 5, so can provide effectual buffering protection for bridge plate 5, further can prevent that damage from appearing in bridge plate 5.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.

Claims

1. The utility model provides a roof beam shock isolation device that falls prevents convenient to bridge is shock-resistant, includes supporting shroud (1), its characterized in that, sliding connection has support column (3) in supporting shroud (1), and the top of support column (3) extends to the top of supporting shroud (1) and fixed mounting has bearing board (4), the top of bearing board (4) is equipped with bridge plate (5), the mounting groove has been seted up to one side of support column (3), and the symmetrical rotation in the mounting groove is connected with two screwed pipes (24), screwed pipe (24) female connection has screw thread post (26), and the screw thread opposite direction on two screw thread posts (26), and two slide openings have been seted up to the symmetry on bearing board (4), and the bottom symmetry of bridge plate (5) has seted up two constant head tanks, and the top of two screw thread posts (26) extends to in two slide openings respectively and all fixed mounting has reference column (27), the top ends of the two positioning columns (27) extend into the two positioning grooves respectively and are clamped with the two positioning grooves respectively, the two positioning columns (27) are connected with the two sliding holes in a sliding mode respectively, one side of the bearing plate (4) is connected with a screw rod (16) in a threaded mode, the screw rod (16) is connected with the two threaded pipes (24) in a transmission mode respectively, the two sides of the bearing plate (4) are connected with clamping plates (6) in a sliding mode respectively, the two clamping plates (6) are clamped with the bridge plate (5) respectively, and the two clamping plates (6) are connected with the screw rod (16) in a transmission mode.

2. The anti-falling beam vibration isolation device convenient for bridge seismic resistance as claimed in claim 1, wherein the threaded pipes (24) are fixedly sleeved with gears (25), the inner wall of the bottom of the mounting groove is slidably connected with a double-sided rack (18) positioned between the two threaded pipes (24), the double-sided rack (18) is respectively meshed with the two gears (25), and one end of the double-sided rack (18) extends to the outer side of the supporting column (3) and is rotatably connected with one end of the screw (16).

3. The anti-falling beam vibration isolation device convenient for bridge seismic resistance as claimed in claim 1, wherein a threaded plate (17) is fixedly installed on one side of the bottom of the bearing plate (4), and the screw rod (16) penetrates through the threaded plate (17) and is in threaded connection with the threaded plate (17).

4. The anti-falling beam vibration isolation device convenient for bridge earthquake resistance as claimed in claim 1, wherein the two sides of the bottom of the bridge plate (5) are both provided with a clamping groove (7), the top parts of the two clamping plates (6) respectively extend into the two clamping grooves (7), the tops of the sides of the two clamping plates (6) close to each other are fixedly provided with a plurality of clamping plates at equal intervals, the inner walls of the sides of the two clamping grooves (7) close to each other are provided with a plurality of fixing grooves at equal intervals, and one sides of the clamping plates respectively extend into the plurality of fixing grooves and are respectively clamped with the plurality of fixing grooves.

5. The anti-falling beam vibration isolation device convenient for bridge seismic resistance as claimed in claim 1, wherein the bottom of the bearing plate (4) is symmetrically and rotatably connected with two installation shafts (20), the two installation shafts (20) are both fixedly provided with a rotating rod (21), and two ends of the rotating rod (21) are respectively in transmission connection with the clamping plate (6) and the screw (16) which are positioned on the same side.

6. The anti-falling beam vibration isolation device convenient for seismic resistance of a bridge is characterized in that a connecting plate (23) is fixedly mounted at the bottom of each of the two clamping plates (6), a connecting ring (22) is slidably connected to one side of the connecting plate (23), one ends of the two rotating rods (21) far away from each other are rotatably connected with the two connecting rings (22) respectively, a connecting pipe (8) is rotatably sleeved on the screw rod (16), two moving rods (19) are slidably connected symmetrically in the connecting pipe (8), and one ends of the two moving rods (19) far away from each other extend to two sides of the connecting pipe (8) respectively and are rotatably connected with one ends of the two rotating rods (21) close to each other respectively.

7. The anti-falling beam shock isolation device convenient for bridge seismic resistance is characterized in that a supporting plate (2) is fixedly installed at the bottom end of the supporting column (3), the supporting plate (2) is in sliding connection with the inner wall of the supporting cover (1), two elastic steel plates (11) which are obliquely arranged are symmetrically and fixedly installed on the inner wall of the bottom of the supporting cover (1), the tops of the two elastic steel plates (11) are respectively contacted with the inner walls of the two sides of the supporting cover (1), and the supporting plate (2) is in transmission connection with the two elastic steel plates (11).

8. The anti-falling beam shock isolation device convenient for seismic resistance of a bridge, as claimed in claim 7, wherein the bottom of the supporting plate (2) is fixedly provided with a supporting column (9), the bottom end of the supporting column (9) is fixedly provided with a buffer tube (10), the buffer tube (10) is internally and symmetrically connected with two buffer columns (13) in a sliding manner, one ends of the two buffer columns (13) far away from each other extend into the supporting cover (1) and are respectively in movable contact with the two elastic steel plates (11), the buffer columns (13) are sleeved with buffer springs (14) positioned on one side of the connecting pipe (8), and two ends of the buffer springs (14) are respectively and fixedly connected with one ends of the buffer columns (13) and one end of the connecting pipe (8).

9. The anti-falling beam vibration isolation device convenient for the seismic resistance of the bridge as claimed in claim 8, wherein the ends of the two buffer columns (13) far away from each other are rotatably connected with rollers (15), and the two rollers (15) are respectively in movable rolling contact with the two elastic steel plates (11).

10. The anti-falling beam shock isolation device convenient for seismic resistance of a bridge according to claim 7, wherein one sides, far away from each other, of the two elastic steel plates (11) are rotatably connected with U-shaped rods (28), the U-shaped rods (28) are slidably sleeved with the two buffer covers (12), the bottoms of the four buffer covers (12) are slidably connected with the inner wall of the bottom of the support cover (1), the inner wall of the bottom of each buffer cover (12) is fixedly provided with a support spring (29), and the top ends of the support springs (29) are fixedly connected with the bottom ends of the U-shaped rods (28).