CN115961540A - Public road bridge roof beam stop device that falls is prevented to bridge - Google Patents
Public road bridge roof beam stop device that falls is prevented to bridge Download PDFInfo
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- CN115961540A CN115961540A CN202211473069.7A CN202211473069A CN115961540A CN 115961540 A CN115961540 A CN 115961540A CN 202211473069 A CN202211473069 A CN 202211473069A CN 115961540 A CN115961540 A CN 115961540A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The invention discloses a public road bridge anti-falling beam limiting device, which relates to the technical field of bridges and comprises a plurality of anti-falling beam buffer chains fixedly arranged between a bridge pier and a bridge body, wherein two groups of installation blocks arranged side by side are detachably arranged on the top surface of the bridge pier, the same group of installation blocks are distributed in a linear array manner, two first installation cavities and two second installation cavities are formed in the installation blocks, a first insertion hole vertically penetrating through the first installation cavity and a second insertion hole vertically penetrating through the second installation cavity are formed in the installation blocks, a first threaded rod penetrates through the first insertion hole, and a second threaded rod penetrates through the second insertion hole. When the bridge body moves outwards, the first threaded rod and the second threaded rod are controlled to ascend, the supporting rods are jacked to be high, the bridge body is inclined, and under the action of gravity, the bridge body also generates downward inclined force, so that the bridge body can be reset under the action of rolling vibration of vehicles and strong wind, and the risk of beam falling of the bridge body is reduced.
Description
Technical Field
The invention relates to the technical field of bridges, in particular to a limiting device for preventing a highway bridge from falling.
Background
The bridge is a building constructed for a road to cross natural or artificial barriers, is erected on rivers, lakes and seas to enable vehicles, pedestrians and the like to smoothly pass through, and generally consists of an upper structure, a lower structure and an auxiliary structure, wherein the upper structure mainly refers to a bridge span structure and a support system, the lower structure comprises a bridge abutment, a bridge pier and a foundation, and the bridge body is generally a prefabricated structure and is installed on the bridge pier in a erecting mode.
When strong wind or earthquake appear in the environment of bridge, under the exogenic action, the displacement can take place for the pontic, when the displacement of pontic surpassed the overlap joint length of pier, the one end of pontic just can drop from the pier and take place the roof beam that falls, traditional roof beam device that prevents falling, generally set up the connecting rod between pontic and pier or prevent falling roof beam cushion chain, when the displacement takes place for the pontic, drag the pontic, reduce the risk that the pontic takes place the roof beam, but because the weight of pontic is great, only rely on the bridge to prevent falling roof beam cushion chain and cushion probably the effect less than ideal when the power that produces when the bridge removed, and current prevent falling roof beam cushion chain only plays the pulling action, be difficult to reset after the pontic displacement towards same direction under the strong wind effect for a long time, prevent falling roof beam cushion chain length time atress, the easy damage fracture, lead to the condition of falling the roof beam emergence, cause serious property loss, there is great potential safety hazard.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, a bridge falling-preventing buffer chain has a poor bridge falling-preventing effect, and a displaced bridge body is difficult to reset and has safety, and provides a limiting device for preventing a highway bridge from falling.
In order to achieve the purpose, the invention adopts the following technical scheme:
a public road bridge roof beam anti-falling limiting device comprises a plurality of anti-falling beam buffer chains fixedly arranged between a bridge pier and a bridge body, wherein two groups of installation blocks arranged side by side are detachably arranged on the top surface of the bridge pier, the same group of installation blocks are distributed in a linear array manner, two first installation cavities and two second installation cavities are formed in the installation blocks, a first insertion hole vertically penetrating through the first installation cavity and a second insertion hole vertically penetrating through the second installation cavity are formed in the installation blocks, a first threaded rod is arranged in the first insertion hole in a penetrating manner, a second threaded rod is arranged in the second insertion hole in a penetrating manner, the tops of the two first threaded rods and the two second threaded rods are connected with a same supporting plate, and the end part of the bridge body is erected on the supporting plate;
the installation block is provided with a slide which is horizontally penetrated and arranged, the slide is communicated with a first installation cavity and a second installation cavity, a slide block is arranged in the slide in a sliding mode, the slide block is in transmission connection with a first threaded rod and a second threaded rod, and the slide block is connected with the bridge body through a movable connection mechanism.
Preferably, be equipped with the axle sleeve one with a threaded rod threaded connection in the first installation cavity, the fixed cover of an axle sleeve outer wall is equipped with gear one, be equipped with the axle sleeve two with two threaded connection of threaded rod in the second installation cavity, the fixed cover of axle sleeve outer wall is equipped with gear two, the slider both sides wall is all fixed and is provided with the rack, gear one and gear two all are connected with rack toothing.
Preferably, the two first threaded rods and the two second threaded rods are respectively positioned on two sides of the sliding block, the screw directions of the threads on the two first threaded rods and the two second threaded rods are opposite, and the screw directions of the threads on the first threaded rods and the second threaded rods which are positioned on the same side are opposite and the same.
Preferably, the number of effective teeth of the first gear is greater than that of the second gear.
Preferably, the inner wall of the slide way is provided with a limit groove, and the outer wall of the slide block is fixedly provided with a limit block in sliding connection with the limit groove.
Preferably, the top surface of the pier is provided with a plurality of mounting grooves with the same shapes as the mounting blocks, the inner walls of the mounting grooves are provided with two symmetrically arranged openings, and the openings correspond to the sliding blocks.
Preferably, the fixed two sets of connecting plates one and two sets of connecting plates two that are provided with in backup pad bottom surface, the connecting hole has been seted up on the connecting plate one, set up the smooth mouth with backup pad parallel arrangement on the connecting plate two, the fixed connecting block one that is provided with in threaded rod top, the fixed spliced pole one that is connected with the connecting hole rotation that is provided with of connecting block lateral wall, the fixed connecting block two that is provided with in threaded rod two tops, the fixed spliced pole two that is provided with of connecting block two lateral walls, spliced pole two extends into in the smooth mouth and offsets with smooth mouthful inner wall.
Preferably, the movable connection mechanism comprises a pressing rod vertically fixed on the bottom surface of the bridge body, a through hole is formed in the sliding block, a pressing frame is arranged in the through hole in a rotating mode, and the pressing rod is inserted into the pressing frame and is in sliding connection with the pressing frame.
Preferably, the bottom all is equipped with the connecting piece in first installation cavity and the second installation cavity, the connecting piece includes supports the pressure disk, supports pressure disk and a plurality of ball down, on support the pressure disk and support the pressure disk one side in opposite directions down and all seted up the cross-section and be curved rolling groove, it is a plurality of the ball is located the rolling groove, axle sleeve one and two bottoms of axle sleeve offset with last support pressure disk respectively.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the first threaded rod, the second threaded rod and the supporting plate are arranged to support the bridge body, the bridge body is connected with the sliding block through the movable connecting mechanism, the sliding block can be driven to move when the bridge body moves, the first threaded rod and the second threaded rod are controlled to lift through the displacement of the sliding block, the first threaded rod and the second threaded rod are controlled to lift when the bridge body moves outwards, the supporting rod is jacked up, the bridge body is inclined, and the bridge body can generate downward force under the action of gravity, so that the bridge body can be reset under the action of rolling vibration of a vehicle and strong wind, the risk of the bridge body falling is reduced, and the problems that the bridge falling prevention effect of the beam buffer chain in the prior art is poor, and the displaced bridge body is difficult to reset and safe are solved.
2. According to the invention, the first gear and the second gear are arranged, and the effective tooth number of the first gear is more than that of the second gear, so that when the first gear and the second gear are driven by the sliding block, the rotating speed of the first gear is slower than that of the second gear, and the second gear on the inner side drives the second threaded rod to move for a larger distance, so that a height difference is formed between the first threaded rod and the second threaded rod, and the supporting plate can synchronously change the angle along with the change of the inclination angle of the bridge body, and can stably support the bridge body.
Drawings
FIG. 1 is a schematic view of the overall structure of a road bridge anti-falling limiting device provided by the invention;
FIG. 2 is a schematic structural view of a joint between a bridge body and a bridge pier of the anti-falling limiting device for a highway bridge, which is provided by the invention;
FIG. 3 is a schematic structural diagram of explosion of internal parts of a mounting block in the anti-falling beam limiting device for highway bridges, which is provided by the invention;
FIG. 4 is a schematic cross-sectional view of a mounting block in the anti-drop limiting device for a road bridge according to the present invention;
FIG. 5 is a schematic view of a horizontal state stress analysis of a bridge body of the anti-falling limiting device for a highway bridge, which is provided by the invention;
FIG. 6 is a schematic diagram illustrating a stress analysis of an inclined state of a bridge body of the anti-falling limiting device for a highway bridge according to the present invention;
FIG. 7 is a schematic structural view of a support plate of the highway bridge anti-falling beam limiting device in different states;
fig. 8 is a schematic structural view of a connecting member in the highway bridge anti-falling beam limiting device provided by the invention.
In the figure: 1. a bridge pier; 2. a bridge body; 3. the beam falling prevention buffer chain; 4. mounting a block; 5. a first threaded rod; 6. a second threaded rod; 7. a slideway; 8. a slider; 9. a support plate; 10. a second shaft sleeve; 11. a first gear; 12. a second gear; 13. a rack; 14. a limiting groove; 15. a limiting block; 16. a sliding port; 17. a pressing rod; 18. pressing the frame; 19. a first shaft sleeve; 20. an upper pressing plate; 21. pressing the plate downwards; 22. a ball bearing; 23. and (4) rolling the groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-2, a public road bridge roof beam stop device that falls, including a plurality of roof beam buffer chain 3 that prevent that set up fixedly between pier 1 and pontic 2, pontic 2 sets up between two piers 1, pontic 2 is in the intermediate position of two piers 1, and prevent that the roof beam buffer chain 3 that falls is in lax state, pontic 2 takes place the skew under the strong wind effect, the roof beam buffer chain 3 that prevents falling that receives the pulling stretches tightly gradually, prevent falling roof beam buffer chain 3 and can exert pulling force to pontic 2, when pontic 2 takes place the displacement, drag the buffering to pontic 2, reduce pontic 2 risk that drops from pier 1, but at pier 1 top surface demountable installation have two sets of installation piece 4 that set up side by side, the linear array of a plurality of installation piece 4 of the same group distributes, the line between a plurality of installation piece 4 of the same group is parallel with pontic 2 terminal surface, two sets of installation piece 4 correspond two pontics 2 respectively.
The top surface of the pier 1 is arranged in a concave mode, the bridge body 2 is erected on the pier 1 and is clamped with the concave part of the top surface of the pier 1, the bridge body 2 is limited in the width direction, and the risk that the bridge body 2 is transversely arranged due to wind in different directions is reduced.
Referring to fig. 1, a plurality of mounting grooves having the same shape as the mounting blocks 4 are formed in the top surface of the pier 1, and the mounting blocks 4 are placed in the mounting grooves, so that the mounting blocks 4 can be kept stable.
Referring to fig. 3-4, two first installation cavities and two second installation cavities are formed in the installation block 4, the first installation cavities and the second installation cavities are cylindrical cavities which are vertically arranged, a first insertion hole vertically penetrating through the first installation cavity and a second insertion hole vertically penetrating through the second installation cavity are formed in the installation block 4, a first threaded rod 5 is arranged in the first insertion hole in a penetrating mode, the first threaded rod 5 can axially move in the first penetrating hole, a second threaded rod 6 is arranged in the second insertion hole in a penetrating mode, the second threaded rod 6 can axially move in the second penetrating hole, the tops of the first threaded rod 5 and the second threaded rod 6 are connected with the same supporting plate 9, the end portion of the bridge body 2 is erected on the supporting plate 9, and the supporting plate 9 plays a supporting role on the bridge body 2.
Referring to fig. 5-6, two ends of the bridge body 2 are located on two adjacent piers 1 and are supported by the supporting plates 9, in an initial state, the bridge body 2 is kept horizontal, the bridge body 2 only receives vertical downward gravity under the non-external force action, and the piers 1 have vertical upward supporting force on the bridge body 2, so that the bridge body 2 is not easy to deflect, when the bridge body 2 displaces, a height difference is formed between the two supporting plates 9 supporting the bridge body 2 by controlling the vertical movement of the first threaded rod 5 and the second threaded rod 6, so that the bridge body 2 forms an inclined state, the bridge body 2 in the inclined state can deflect to one end in a low position under the action of self gravity and is difficult to move to one end in a high position, thereby limiting the displacement of the bridge body 2, reducing the risk of girder falling between the bridge body 2 and the piers 1, improving the stability of the bridge, and controlling the height difference between the two supporting plates 9, so that the direction of the deflection trend of the bridge body 2 can be controlled, which is beneficial to correct the position of the bridge body 2 after the deflection of the bridge 2, and improving the safety of the bridge.
Set up the slide 7 that has the level to run through the setting on the installation piece 4, slide 7 is parallel with the long limit direction of pontic 1, consequently slide 7 can restrict the displacement direction of pontic 2, make pontic 2 only slide in long limit direction, slide 7 is linked together with first installation cavity and second installation cavity, it is provided with slider 8 to slide in slide 7, slider 8 can slide along the length direction of slide 7 in slide 7, the opening that two symmetries set up is seted up to the mounting groove inner wall, the opening corresponds with slider 8, through setting up the opening, make slider 8's movable range bigger, slider 8 accessible opening extension department pier 1, be convenient for slider 8 and pontic 2 are connected, be connected through swing joint mechanism between slider 8 and the pontic 2, make slider 8 can move along with the motion of pontic 2 through swing joint mechanism, and when pontic 2 takes place the slope, slider 8 can follow pontic 2 all the time and carry out the displacement.
Referring to fig. 3-4, a limiting groove 14 is formed in the inner wall of the slide 7, a limiting block 15 in sliding connection with the limiting groove 14 is fixedly arranged on the outer wall of the slide 8, the limiting groove 14 is formed in the length direction of the slide 7, the limiting block 15 is arranged in the length direction of the slide 8, and the position of the slide 8 in the slide 7 is limited by matching the limiting groove 14 with the limiting block 15, so that the risk of lateral deviation of the slide 8 in the slide 7 is reduced, and the stability of the slide 8 is improved.
Referring to fig. 3-4, a first shaft sleeve 19 in threaded connection with the first threaded rod 5 is arranged in the first mounting cavity, a first cylindrical groove which is coaxially arranged is formed in the first mounting cavity, the diameter of the first cylindrical groove is consistent with that of the first shaft sleeve 19, the end part of the first shaft sleeve 19 is clamped in the first cylindrical groove, the first shaft sleeve 19 is limited through the columnar groove, so that the first shaft sleeve 19 can stably rotate, a first gear 11 is fixedly sleeved on the outer wall of the first shaft sleeve 19, a second shaft sleeve 10 in threaded connection with a second threaded rod 6 is arranged in the second installation cavity, a second columnar groove which is coaxially arranged is formed in the second installation cavity, the diameter of the second columnar groove is consistent with that of the second shaft sleeve 10, the end part of the second shaft sleeve 10 is clamped in the second columnar groove, the second shaft sleeve 10 can be limited by the two pairs of cylindrical grooves, so that the second shaft sleeve 10 can stably rotate, the second gear 12 is fixedly sleeved on the outer wall of the second shaft sleeve 10, racks 13 are fixedly arranged on two side walls of the sliding block 8, the first gear 11 and the second gear 12 are meshed and connected with the racks 13, the sliding block 8 drives the racks 13 to move when moving horizontally along the slide way 7, the first gear 11 and the second gear 12 are driven to rotate under the action of the rack 13, so that the first shaft sleeve 19 and the second shaft sleeve 10 are driven to rotate, because the first shaft sleeve 19 is in threaded connection with the first threaded rod 5, the second shaft sleeve 10 is in threaded connection with the second threaded rod 6, therefore, when the first shaft sleeve 19 and the second shaft sleeve 10 rotate, the first threaded rod 5 and the second threaded rod 6 are driven to axially displace, the height of the support plate 9 is adjusted, the height difference of the support plates 9 at two ends of the bridge body 2 is favorably controlled, the beam falling is prevented, when the anti-falling beam buffer chain 3 is pulled to the limit state, the bridge body 2 is inclined to slide to the lower end through the inclined acting force generated by the inclination of the bridge body 2, so that the risk of breakage of the anti-falling beam buffer chain 3 beyond the stress limit is reduced.
Referring to fig. 3-4, the two first threaded rods 5 and the two second threaded rods 6 are respectively located on two sides of the slider 8, so that when the first gear 11 or the second gear 12 is driven by the rack 13 to rotate, the rotating directions of the two first gears 11 and the two second gears 12 located on two sides of the slider 8 are opposite, and the screw thread directions on the two first threaded rods 5 and the two second threaded rods 6 are opposite, so that when the two first gears 11 and the two second gears 12 rotate in opposite directions, the first threaded rods 5 and the second threaded rods 6 are respectively driven to synchronously move, and the screw thread directions on the first threaded rods 5 and the second threaded rods 6 located on the same side are opposite and the same, so that the first threaded rods 5 and the second threaded rods 6 synchronously move under the driving of the rack 13.
Referring to fig. 5-7, in specific implementation, the bridge body 2 is shifted under the action of strong wind, the bridge body 2 drives the sliding blocks 8 on the piers 1 at two ends to move, the sliding block 8 at the advancing end of the bridge body 2 moves towards the inside of the installation block 4, the sliding block 8 at the tail end of the bridge body 2 moves away from the installation block 4, at this time, the sliding block 8 drives the gear I11 and the gear II 12 to rotate through the rack 13, the gear I19 and the gear II 10 are driven to rotate, the driving threaded rod I5 and the threaded rod II 6 move axially to drive the supporting plate 9 to change the height, because the movement of the sliding blocks 8 at the advancing end and the tail end of the bridge body 2 is opposite to the relative movement direction of the corresponding installation block 4, the supporting plate 9 on the installation block 4 at the advancing end of the bridge body 2 is jacked upwards, and the supporting plate 9 on the installation block 4 at the tail end of the bridge body 2 falls down, at this moment, the height difference occurs in the support plates 9 at the two ends of the bridge body 2, so that the bridge body 2 is in an inclined state with the advancing end higher than the tail end, when the bridge body 2 is in the inclined state, the support force borne by the bridge body 2 is not vertical upwards any more, the bridge body 2 can bear the gravity component in the downward inclined direction, at this moment, the bridge body 2 tends to move towards one end at a low position, especially when the vehicle runs on the surface of the bridge body 2 and the bridge body 2 vibrates under the action of strong wind, the movement of the bridge body 2 towards the low position is more obvious, so that the bridge body 2 can be reset, in the resetting process of the bridge body 2, the slide block 8 is driven to reset, therefore, the support plates 9 at the two ends of the bridge body 2 return to the initial horizontal state again, after the bridge body 2 returns to the horizontal state, the gravity and the support force of the bridge body 2 are both in the vertical state, and the bridge body 2 is favorable for keeping stable.
Compared with the traditional mode of improving the traction strength of the anti-falling beam device, the invention synchronously changes the supporting heights of the two ends of the bridge body 2 by changing the position state when the bridge body 2 is deviated, so that the height difference is formed on the bridge body 2, and the characteristic that an object naturally slides down to a lower position under the gravity condition is utilized, so that the bridge body 2 tends to automatically recover after the deviation is generated, the larger the deviation distance is, the larger the inclination angle of the bridge body 2 to the original position is, the larger the force tending to recover is, the self weight of the bridge body 2 is huge, the traction mode has a limit value, the use strength is limited, and the traction mode is not suitable for bridges with large span.
Referring to fig. 8, the bottom portions in the first installation cavity and the second installation cavity are respectively provided with a connecting piece, the connecting pieces comprise an upper abutting plate 20, a lower abutting plate 21 and a plurality of balls 22, one opposite side of the upper abutting plate 20 and the lower abutting plate 21 is provided with a rolling groove 23 with an arc-shaped cross section, the balls 22 are located in the rolling groove 23, the bottom ends of the first shaft sleeve 19 and the second shaft sleeve 10 are respectively abutted against the upper abutting plate 20, the first shaft sleeve 19 and the second shaft sleeve 10 are respectively abutted against the upper abutting plate 20 on the corresponding connecting piece, the lower abutting plate 21 is respectively connected with the bottom portions in the first columnar groove and the second columnar groove, and the resistance when the first shaft sleeve 19 or the second shaft sleeve 10 rotates can be reduced through the balls 22 between the upper abutting plate 20 and the lower abutting plate 21, so that the first shaft sleeve 19 and the second shaft sleeve 10 rotate more smoothly.
Referring to fig. 3, 4 and 7, the effective number of teeth of the first gear 11 is greater than that of the second gear 12, the first gear 11 is arranged on one side, far away from the pier 1, of the installation block 4, the second gear 12 is arranged on one side, close to the pier 1, of the installation block 4, because the effective number of teeth of the first gear 11 is greater than that of the second gear 12, when the rack 13 drives the first gear 11 and the second gear 12 to rotate simultaneously, the number of rotating turns of the second gear 12 is greater than that of the first gear 11, therefore, the distance that the second gear 6 is located is greater than that of the first threaded rod 5, the support plate 9 is in an inclined state, surface contact between the bridge body 2 and the support plate 9 during inclination is avoided to be line contact, the support plate 9 can be kept attached to the bottom surface of the bridge body 2 during inclination of the bridge body 2, stable support of the support plate 9 to the bridge body 2 is facilitated, and the support plate 9 is prevented from being broken and damaged due to uneven stress during line contact support of the inclined bridge body 2.
Referring to fig. 7, two first connecting plates and two second connecting plates are fixedly arranged on the bottom surface of a supporting plate 9, connecting holes are formed in the first connecting plates, sliding openings 16 parallel to the supporting plate 9 are formed in the second connecting plates, a first connecting block is fixedly arranged at the top of a first threaded rod 5, a first connecting column rotationally connected with the connecting holes is fixedly arranged on the side wall of the first connecting block, and when the first threaded rod 5 and a second threaded rod 6 simultaneously displace and control the height of the supporting plate 9, due to the fact that the moving speeds of the first threaded rod 5 and the second threaded rod 6 are different, the supporting plate 9 can rotate around the first connecting column to achieve the purpose of changing the angle of the supporting plate 9, a second connecting block is fixedly arranged at the top of the second threaded rod 6, a second connecting column is fixedly arranged on the side wall of the second connecting block and extends into the sliding openings 16 and abuts against the inner wall of the sliding openings 16, and due to the fact that the distance between the first threaded rod 5 and the second threaded rod 6 and the supporting plate 9 is unchanged, when the horizontal state is changed, the threaded rod is changed into the vertical state, the connecting points are in the sliding openings 16 in a sliding mode that the distance is changed, and the first connecting column is prevented from being blocked between the first threaded rod 5 and the second threaded rod 6 and the supporting plate 9.
Referring to fig. 2 and 7, the movable connection mechanism includes a pressing rod 17 vertically fixed on the bottom surface of the bridge body 2, a through hole is formed in the slider 8, a pressing frame 18 is rotatably disposed in the through hole, the pressing rod 17 is inserted into the pressing frame 18 and slidably connected with the pressing frame 18, the pressing rod 17 drives the pressing frame 18 to move along with the movement of the bridge body 2, and the pressing frame 18 is rotatably disposed on the slider 8, so that the pressing frame 18 can be rotated by a self-adaptive rotation angle without being clamped after the bridge body 2 is inclined, and the pressing rod 17 and the pressing frame 18 can still be matched to drive the slider 8.
The specific working principle of the invention is as follows:
when the device is used, firstly, the supporting plate 9 is leveled, the sliding block 8 is inserted into the slide way 7, the sliding block 8 is positioned at the middle position of the first two gears 11 and the second two gears 12, the rack 13 on the side wall of the sliding block 8 is matched with the first two gears 11 and the second two gears 12, the first shaft sleeve 19 and the second shaft sleeve 10 are axially limited, the first threaded rod 5 is screwed into the first shaft sleeve 19, the second threaded rod 6 is screwed into the second shaft sleeve 10, the first shaft sleeve 19 is positioned at the middle point position of the first threaded rod 5, the second shaft sleeve 10 is positioned at the middle point position of the second threaded rod 6, the top ends of the first threaded rod 5 and the second threaded rod 6 are positioned at the same height, the supporting plate 9 is installed on the first threaded rod 5 and the second threaded rod 6, and the supporting plate 9 is positioned in a horizontal state;
placing and installing a bridge body 2, respectively erecting two ends of the bridge body 2 on piers 1, respectively supporting the two ends of the bridge body 2 on supporting plates 9 on two adjacent piers 1 through the leveled supporting plates 9, respectively inserting abutting rods 17 into abutting frames 18, enabling the bridge body 2 to be in a horizontal state, enabling a first threaded rod 5, a second threaded rod 6 and a sliding block 8 to be in respective central positions, enabling the bridge body 2 to be in an intermediate position of the two piers 1, installing an anti-falling beam buffer chain 3 between the rest piers 1 of the bridge body 2, enabling the anti-falling beam buffer chain 3 to be in a loose state, enabling the bridge body 2 to deviate under the action of strong wind, enabling the pulled anti-falling beam buffer chain 3 to stretch and tighten gradually, carrying out traction buffering on the bridge body 2, enabling the bridge body 2 to be in a movable limit position under the action of the anti-falling beam buffer chain 3, and enabling the anti-falling beam buffer chain 3 to have a limit of traction strength, when the bridge body 2 moves, the bridge body 2 drives the sliding blocks 8 on the piers 1 at two ends to move, because the initial state of the sliding blocks 8 is located at the middle position, the sliding blocks 8 located at the advancing end of the bridge body 2 move towards the inside of the installation blocks 4, the sliding blocks 8 located at the tail end of the bridge body 2 move away from the installation blocks 4, at the moment, the sliding blocks 8 drive the first gear wheel 11 and the second gear wheel 12 to rotate through the rack 13, the first shaft sleeve 19 and the second shaft sleeve 10 to rotate, the first threaded rod 5 and the second threaded rod 6 are located at the middle position, the first threaded rod 5 and the second threaded rod 6 are driven to axially move to change the height position, the supporting plates 9 are driven to change the height, because the movement directions of the sliding blocks 8 at the advancing end and the tail end of the bridge body 2 are opposite to the relative movement direction of the corresponding installation blocks 4, the supporting plates 9 on the installation blocks 4 at the advancing end of the bridge body 2 are jacked upwards, the supporting plates 9 on the installation blocks 4 at the tail end of the bridge body 2 fall down, at the moment, the supporting plates 9 at the two ends of the bridge body 2 have height difference, so that the bridge body 2 has an inclined state that the advancing end is higher than the tail end, and when a vehicle runs on the surface of the bridge body 2 and the bridge body 2 vibrates under the action of strong wind, the bridge body 2 moves towards a low position, and the risk that the bridge body 2 falls off a beam is reduced.
Because the effective tooth number of the first gear 11 is more than that of the second gear 12, when the first gear 11 and the second gear 12 are driven by the rack 13 simultaneously, the number of rotating turns of the second gear 12 is more than that of the first gear 11, and therefore the distance of the second threaded rod 6 is greater than that of the first threaded rod 5, the supporting plate 9 is in an inclined state, the supporting plate 9 can be kept attached to the bottom surface of the bridge body 2 when the bridge body 2 is inclined, and the supporting plate 9 can stably support the bridge body 2.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (9)
1. The anti-falling-beam limiting device for the highway bridge comprises a plurality of anti-falling-beam buffer chains (3) fixedly arranged between a pier (1) and a bridge body (2), and is characterized in that two groups of installation blocks (4) arranged side by side are detachably arranged on the top surface of the pier (1), the installation blocks (4) of the same group are distributed in a linear array manner, two first installation cavities and two second installation cavities are formed in the installation blocks (4), a first insertion hole vertically penetrating through the first installation cavity and a second insertion hole vertically penetrating through the second installation cavity are formed in the installation blocks (4), a first threaded rod (5) is arranged in the first insertion hole in a penetrating manner, a second threaded rod (6) is arranged in the second insertion hole in a penetrating manner, the tops of the two first threaded rods (5) and the two second threaded rods (6) are connected with a same supporting plate (9), and the end part of the bridge body (2) is erected on the supporting plate (9);
the bridge is characterized in that a slide (7) which is horizontally arranged in a penetrating mode is arranged on the mounting block (4), the slide (7) is communicated with the first mounting cavity and the second mounting cavity, a slide block (8) is arranged in the slide (7) in a sliding mode, the slide block (8) is in transmission connection with the first threaded rod (5) and the second threaded rod (6), and the slide block (8) is connected with the bridge body (2) through a movable connection mechanism.
2. The public road bridge roof beam stop device of claim 1, characterized in that, be equipped with in the first installation cavity with threaded rod one (5) threaded connection's axle sleeve one (19), the fixed cover of axle sleeve one (19) outer wall is equipped with gear one (11), be equipped with in the second installation cavity with threaded rod two (6) threaded connection's axle sleeve two (10), the fixed cover of axle sleeve two (10) outer wall is equipped with gear two (12), slider (8) both sides wall all is fixed and is provided with rack (13), gear one (11) and gear two (12) all are connected with rack (13) meshing.
3. The public road bridge roof beam stop device of claim 2, characterized in that, two threaded rods one (5) and two threaded rods two (6) are respectively located at both sides of the slider (8), the screw direction of the screw thread on two threaded rods one (5) and two threaded rods two (6) is opposite, and the screw direction of the screw thread on the threaded rod one (5) and the screw thread on the threaded rod two (6) located at the same side is the same.
4. A road bridge girder falling prevention limiting device according to claim 2, wherein the number of effective teeth of the first gear (11) is greater than that of the second gear (12).
5. The public road bridge roof beam stop device of claim 1, characterized in that, the slide (7) inner wall has seted up spacing groove (14), slider (8) outer wall fixed be provided with spacing piece (15) with spacing groove (14) sliding connection.
6. The public road bridge roof beam stop block of claim 1, characterized in that, the top surface of pier (1) has a plurality of mounting grooves with the same shape as the mounting block (4), the inner wall of the mounting groove has two symmetrically arranged openings, the openings correspond to the sliding blocks (8).
7. The public road bridge roof beam stop device of claim 1, characterized in that, two sets of connecting plates one and two sets of connecting plates two are fixed on the bottom surface of the supporting plate (9), the connecting hole is opened on the connecting plate one, the sliding opening (16) parallel to the supporting plate (9) is opened on the connecting plate two, the connecting block one is fixed on the top of the threaded rod one (5), the connecting column one rotationally connected with the connecting hole is fixed on the side wall of the connecting block one, the connecting block two is fixed on the top of the threaded rod two (6), the connecting column two is fixed on the side wall of the connecting block two, the connecting column two extends into the sliding opening (16) and abuts against the inner wall of the sliding opening (16).
8. The public road bridge roof beam stop device of claim 1, characterized in that, the swing joint mechanism includes the support pressure rod (17) that sets up in the bottom surface of the pontic (2) perpendicularly fixedly, the slider (8) is seted up and is run through the mouth, the mouth internal rotation that runs through is provided with the support pressure frame (18), the support pressure rod (17) inserts in support pressure frame (18) and with support pressure frame (18) sliding connection.
9. The public road bridge roof beam stop device of claim 2, characterized in that, the bottom all is equipped with the connecting piece in first installation cavity and the second installation cavity, the connecting piece includes last pressure disk (20), lower pressure disk (21) and a plurality of ball (22) support, the one side that goes up to support pressure disk (20) and lower pressure disk (21) opposite is all seted up the rolling groove (23) that the cross-section is the arc, a plurality of ball (22) are located rolling groove (23), axle sleeve (19) and axle sleeve (10) bottom respectively with support pressure disk (20) counterbalance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211473069.7A CN115961540A (en) | 2022-11-21 | 2022-11-21 | Public road bridge roof beam stop device that falls is prevented to bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211473069.7A CN115961540A (en) | 2022-11-21 | 2022-11-21 | Public road bridge roof beam stop device that falls is prevented to bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115961540A true CN115961540A (en) | 2023-04-14 |
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ID=87360663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211473069.7A Pending CN115961540A (en) | 2022-11-21 | 2022-11-21 | Public road bridge roof beam stop device that falls is prevented to bridge |
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| Country | Link |
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| CN (1) | CN115961540A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117107667A (en) * | 2023-10-25 | 2023-11-24 | 河南省铁山起重设备集团有限公司 | Tilting-prevention auxiliary device of bridge girder erection machine |
-
2022
- 2022-11-21 CN CN202211473069.7A patent/CN115961540A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117107667A (en) * | 2023-10-25 | 2023-11-24 | 河南省铁山起重设备集团有限公司 | Tilting-prevention auxiliary device of bridge girder erection machine |
| CN117107667B (en) * | 2023-10-25 | 2024-01-16 | 河南省铁山起重设备集团有限公司 | Tilting-prevention auxiliary device of bridge girder erection machine |
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