CN114108454A

CN114108454A - Rotary friction limiting type shock absorption and isolation support for high-speed rail bridge

Info

Publication number: CN114108454A
Application number: CN202111401495.5A
Authority: CN
Inventors: 吴海军; 王旭; 陆萍
Original assignee: Chongqing Jiaotong University
Current assignee: Chongqing Jiaotong University
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2022-03-01

Abstract

The invention relates to the technical field of shock absorption and isolation supports of high-speed railway bridges, wherein a supporting column is fixedly connected to the bottom of a top plate on the lower surface of a mounting plate, the bottom of the supporting column is fixedly connected with a sliding base, the lower surface of an arc-shaped plate is fixedly connected to the bottom of the supporting column, a rotary friction limiting device is fixedly connected to the lower surface of a middle plate on the bottom of the sliding base, the bottom of the rotary friction limiting device is fixedly connected with a lower fixing plate, the lower surface of the mounting plate is fixedly connected with a first ball head cover, one end of an upper ball head is fixedly connected to the inside of the first ball head base in a rotating mode, the other end of the connecting shaft is fixedly connected with a damping piston on a threaded rod in a rotating mode, the other end of the middle part of the threaded rod is fixedly connected with a lower ball head in a threaded mode, and the bottom of the lower ball head is rotatably connected with a second ball head base and a second ball head cover; the problem of traditional bridge subtract isolation bearing can subtract isolation bearing to the bridge and produce oblique pressure load, reduce bridge life, and cause the bridge safety in utilization to reduce is solved.

Description

Rotary friction limiting type shock absorption and isolation support for high-speed rail bridge

Technical Field

The invention relates to the technical field of bridge seismic isolation and reduction supports, in particular to a rotary friction limiting type high-speed rail bridge seismic isolation and reduction support.

Background

The shock insulation support is a support device arranged for meeting the shock insulation requirement of a structure, a shock insulation layer is additionally arranged between an upper structure and a foundation, a rubber shock insulation support is installed to achieve soft connection with the ground, and through the technology, about 80% of energy of an earthquake can be offset. Such as laminated rubber mounts (or seismic isolation rubber mounts, laminated rubber pads, etc.). The structural member has small horizontal rigidity and large vertical rigidity, can bear large horizontal deformation, and can be used as a part of a load-bearing system.

When subtracting isolation bearing during operation, need offset through shaking ground bridge face and reach the designing requirement, at the in-process of offsetting the vibration, receive the power that comes from each direction, including pressure, shearing force and torsion, traditional high-speed railway bridge subtracts isolation bearing at the during operation, can not effectually offset the shearing force, cause the shearing force that comes from each direction to lead to the fact to destroy to subtracting isolation bearing, make the life greatly reduced who subtracts isolation bearing, cause the security decline that high-speed railway bridge used, produce very big harm to high-speed railway passenger's personal safety, be not conform to the requirement of in-service use.

Disclosure of Invention

In view of the above, the invention solves the problems that when a traditional bridge seismic isolation bearing bears a non-vertical pressure load generated by a bridge, an oblique pressure load is generated on the bridge seismic isolation bearing, the service life of the bridge is shortened, and the use safety of the bridge is reduced, and provides the rotary friction limiting type high-speed railway bridge seismic isolation bearing.

In order to achieve the purpose, the invention provides the following technical scheme:

a rotary friction limiting type high-speed rail bridge seismic isolation and reduction support comprises an upper fixing plate, wherein a mounting plate is fixedly connected to the lower surface of the upper fixing plate, a top plate is fixedly connected to the lower surface of the mounting plate, a supporting column is fixedly connected to the bottom of the top plate, an arc-shaped plate is fixedly connected to the bottom of the supporting column, a sliding base is fixedly connected to the lower surface of the arc-shaped plate, an intermediate plate is fixedly connected to the bottom of the sliding base, a rotary friction limiting device is fixedly connected to the lower surface of the intermediate plate, a rotating device is mounted on the lower surface of the intermediate plate, a lower fixing plate is fixedly connected to the bottom of the rotary friction limiting device, two first ball head bases are fixedly connected to the lower surface of the mounting plate, a first ball head cover is fixedly connected to the lower surface of the first ball head base, and an upper ball head is rotatably connected to the interior of the first ball head base, go up the one end fixedly connected with connecting axle of bulb, the other end of connecting axle rotates and is connected with the threaded rod, the other end fixedly connected with damping piston of threaded rod, the mid portion threaded connection of threaded rod has a damping section of thick bamboo, bulb under the other end fixedly connected with of a damping section of thick bamboo, the bottom of bulb rotates and is connected with second bulb base and second bulb lid down.

Further, the upper surface joint of an upper fixed plate has an upper connecting cylinder, the both sides joint of upper connecting cylinder has a plurality of upper joint pieces, the bottom and the upper fixed plate fixed connection of upper joint piece, the lower surface joint of lower fixed plate has a lower connecting cylinder, the both sides joint of lower connecting cylinder has a plurality of lower joint pieces, the bottom and the lower fixed plate fixed connection of lower joint piece, the lower surface threaded connection of mounting panel has last fixing bolt, the mid portion of going up fixing bolt has cup jointed last fixed cylinder, the upper surface threaded connection of lower fixed plate has lower fixing bolt, fixing bolt's mid portion has cup jointed down fixed cylinder down.

Further, grout holes have all been seted up to the upper surface of going up the connecting cylinder and the lower surface of lower connecting cylinder, the fixed orifices has all been seted up to the upper surface of going up the connecting cylinder and the lower surface of lower connecting cylinder.

Furthermore, the lower surface of the upper fixing plate is fixedly connected with two upper baffles, and the upper surface of the lower fixing plate is fixedly connected with two lower baffles.

Further, the rotary friction limiting device comprises a lower fixing disc, a lower friction ring, an upper friction ring and an upper fixing disc, the lower fixed surface of the middle plate is fixedly connected with the upper fixing disc, the lower fixed surface of the upper fixing disc is fixedly connected with the upper friction ring, the upper fixed surface of the lower fixing disc is fixedly connected with the lower fixing disc, and the upper fixed surface of the lower fixing disc is fixedly connected with the lower friction ring.

Further, rotating device is including rotating the minor axis, rotating the base, rotating the lid, fixing a position the lid, go up rotating ring, roll axis and lower rotating ring, the lower fixed surface of intermediate lamella is connected with and rotates the lid, the bottom fixedly connected with location lid of rotating the lid, rotating the rotating ring on the bottom fixedly connected with of lid, the bottom of going up rotating ring is rotated and is connected with a plurality of roll axes, the last fixed surface of bottom plate is connected with and rotates the minor axis, the last fixed surface of rotating the minor axis is connected with down rotating ring.

Furthermore, the upper surface of the lower friction ring is fixedly connected with a plurality of friction ball heads.

Further, a lubricating groove is arranged in the damping cylinder in a clamped mode.

Further, a buffer groove is formed in the damping cylinder.

Furthermore, a sealing ring is arranged on the outer wall of the damping piston.

The invention has the beneficial effects that:

1. according to the rotary friction limiting type shock absorption and isolation support for the high-speed railway bridge, the positions of the ball head base, the ball head cover, the connecting shaft, the threaded rod, the damping cylinder, the lower ball head and the upper ball head are obliquely designed and installed and are symmetrically designed, so that when the shock absorption and isolation support is extruded by pressure loads from different directions, the rigidity of the device cannot be damaged, and the pressure resistance effect of the shock absorption and isolation support is more stable.

2. The rotary friction limiting type high-speed rail bridge seismic isolation and reduction support disclosed by the invention is provided with a rotary friction limiting device, when a bridge is locally deformed, a torsion load can be generated, so that a supporting column twists an arc-shaped disc, the arc-shaped disc twists a sliding base, the sliding base twists an intermediate plate, and the intermediate plate twists an upper fixing disc, so that an upper friction ring is twisted, the upper friction ring generates relative displacement between lower friction rings, so that the lower friction ring generates relative friction on the upper friction ring, a larger friction force is generated, the seismic isolation and reduction support cannot rotate excessively, and the deformation of the bridge due to the action of the torsion load is limited.

3. According to the rotary friction limiting type shock absorption and isolation support for the high-speed railway bridge, expansion cement is poured into the cavities of the upper connecting cylinder and the lower connecting cylinder through the grouting holes respectively, the bolts are inserted into the fixing holes, the upper connecting cylinder is fixedly connected with the bottom of the bridge, the lower connecting cylinder is fixedly connected with the supporting base of the bridge, the bolts are screwed down, and when the cement is solidified, the expansion cement fills the cavities of the upper connecting cylinder and the lower connecting cylinder, so that the cement is fully contacted with the bolts, the bolt connection is more stable, the expansion cement has certain elasticity, and the influence of vibration on the bolts can be buffered.

4. The rotary friction limiting type shock absorption and isolation support for the high-speed rail bridge is provided with the sliding base and the arc-shaped disc, the arc-shaped disc is fixedly connected to the bottom of the supporting column, the sliding base is movably connected to the lower surface of the arc-shaped disc, the bottom of the arc-shaped disc is a spherical surface with a radian, a contact surface of the spherical surface can bear larger load, and the stability of the device can be improved.

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 a rotary friction limiting type shock absorption and isolation support for a high-speed rail bridge, provided by the invention;

FIG. 2 is a side view of the rotary friction limiting type shock absorption and isolation support for the high-speed rail bridge;

FIG. 3 is a bottom view of the rotary friction limiting type shock absorption and isolation support for the high-speed rail bridge of the invention;

FIG. 4 is a cross-sectional view of a rotary friction limiting type high-speed rail bridge seismic isolation bearing of the invention;

FIG. 5 is an enlarged view taken at A of FIG. 4 in accordance with the present invention;

FIG. 6 is an enlarged view of the invention at B of FIG. 4;

FIG. 7 is a schematic view of connection of an upper ball head and a lower ball head in the vibration reduction and isolation support of the rotary friction limiting type high-speed rail bridge of the invention;

FIG. 8 is an enlarged view of the invention at C of FIG. 7.

Reference numerals: 1. an upper fixing plate; 2. grouting holes; 3. a fixing hole; 4. an upper connecting cylinder; 5. an upper clamping block; 6. an upper baffle plate; 7. mounting a plate; 8. a top tray; 9. a support pillar; 10. a lower baffle plate; 11. a lower fixing plate; 12. a lower clamping block; 13. a lower connecting cylinder; 14. a lower fixed disc; 15. a lower friction ring; 16. an upper friction ring; 17. an upper fixed disc; 18. a middle plate; 19. a sliding base; 20. an arc-shaped tray; 21. a second ball head base; 22. a second ball head cover; 23. a connecting shaft; 24. a threaded rod; 25. a damping cylinder; 26. a ball head is arranged; 27. an upper fixed cylinder; 28. an upper fixing bolt; 29. rotating the short shaft; 30. rotating the base; 31. rotating the cover; 32. a positioning cover; 33. an upper rotating ring; 34. a roll axis; 35. a lower rotating ring; 36. a ball head is rubbed; 37. a lower fixing bolt; 38. a lower fixed cylinder; 39. a ball head is arranged; 40. a damping piston; 41. a buffer tank; 42. a seal ring; 43. a lubrication groove.

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.

Example one

As shown in fig. 1-6, a rotating friction limiting type high-speed rail bridge seismic isolation bearing comprises an upper fixing plate 1, a lower surface of which is provided with a mounting plate 7, a lower surface of the mounting plate 7 is provided with a top plate 8, the bottom of the top plate 8 is provided with a support column 9, the bottom of the support column 9 is provided with an arc-shaped plate 20, the lower surface of the arc-shaped plate 20 is provided with a sliding base 19, the bottom of the sliding base 19 is provided with an intermediate plate 18, the lower surface of the intermediate plate 18 is provided with a rotating device, the bottom of the rotating friction limiting device is provided with a lower fixing plate 11, the lower surface of the mounting plate 7 is provided with two first ball head bases, the lower surfaces of the first ball head bases are provided with first ball head covers, the inner parts of the first ball head bases are movably connected with upper ball heads 39, one end of the upper ball heads 39 is provided with a connecting shaft 23, and the other end of the connecting shaft 23 is movably connected with a threaded rod 24, the other end of the threaded rod 24 is provided with a damping piston 40, the middle part of the threaded rod 24 is in threaded connection with a damping cylinder 25, the other end of the damping cylinder 25 is provided with a lower ball head 26, and the bottom of the lower ball head 26 is movably connected with a second ball head base 21 and a second ball head cover 22.

Through the technical scheme, the lower surface of the upper fixing plate 1 is fixedly connected with the mounting plate 7, the edge of the mounting plate 7 is provided with the through hole, the installation of a bolt is facilitated, the lower surface of the mounting plate 7 is fixedly connected with the top disc 8, the bottom of the top disc 8 is fixedly connected with the supporting column 9, the top disc 8 is used for facilitating the installation of the supporting column 9, the bottom of the top disc 8 is provided with the circular bayonet which is equal to the diameter of the supporting column 9, so that the supporting column 9 is convenient to install, the supporting column 9 is made of elastic material and has stronger pressure resistance and can bear the pressure of the top, the bottom of the supporting column 9 is fixedly connected with the arc-shaped disc 20, the lower surface of the arc-shaped disc 20 is movably connected with the sliding base 19, the bottom of the arc-shaped disc 20 is a spherical surface with radian, the contact surface of the spherical surface can bear larger load and can also increase the stability of the device, and the groove of the spherical surface of the top of the supporting column 9, the cooperation is used, and sliding base 19's bottom fixedly connected with intermediate lamella 18, and there is circular shape protrusion on the both sides of intermediate lamella 18, easy to assemble.

The lower surface of the middle plate 18 is fixedly connected with a rotating friction limiting device, the lower surface of the middle plate 18 is provided with a rotating device, the bottom of the rotating friction limiting device is fixedly connected with a lower fixing plate 11, the lower surface of the mounting plate 7 is fixedly connected with two first ball head bases, the lower surface of the first ball head base is fixedly connected with a first ball head cover, the inner part of the first ball head base is movably connected with an upper ball head 39, the first ball head base and the first ball head cover are matched for use, a spherical cavity is formed in the inner part of the first ball head base and is convenient for mounting the upper ball head 39, one end of the upper ball head 39 is fixedly connected with a connecting shaft 23, the other end of the connecting shaft 23 is movably connected with a threaded rod 24, one end of the threaded rod 24 is provided with an external thread, the other end of the threaded rod 24 is fixedly connected with a damping piston 40, one end of the damping piston 40 is provided with a chamfer treatment, and the outer side of the damping piston 40 is provided with an annular groove, the middle part threaded connection of threaded rod 24 has a damping section of thick bamboo 25, and the internal thread has been seted up to damping section of thick bamboo 25's inside, uses with threaded rod 24 cooperation, and bulb 26 under the other end fixedly connected with of damping section of thick bamboo 25, the bottom swing joint of bulb 26 has second bulb base 21 and second bulb lid 22 down.

Example two

As a further improvement of the previous embodiment, as shown in fig. 1-8, in this embodiment, an upper connecting cylinder 4 is connected to an upper surface of an upper fixing plate 1 in a clamping manner, a protrusion is formed at an edge of the upper connecting cylinder 4, a cavity is formed inside the upper connecting cylinder, a plurality of upper clamping blocks 5 are clamped at two sides of the upper connecting cylinder 4, the upper clamping blocks 5 are irregular in shape, through holes are formed in the upper surfaces of the upper clamping blocks 5 for convenient installation, the bottom of each upper clamping block 5 is fixedly connected with the upper fixing plate 1, a plurality of strip-shaped protrusions are formed on the upper surface of the upper fixing plate 1 for convenient installation of the upper connecting cylinder 4, a lower connecting cylinder 13 is clamped on a lower surface of a lower fixing plate 11, a protrusion is formed at an edge of the lower connecting cylinder 13, a cavity is formed inside the lower connecting cylinder 13, a plurality of lower clamping blocks 12 are clamped at two sides of the lower connecting cylinder 13, the lower clamping blocks 12 are irregular in shape, through holes are formed in the upper surfaces of the lower clamping blocks 12, the installation is convenient.

The bottom of the lower clamping block 12 is fixedly connected with the lower fixing plate 11, the upper surface of the lower fixing plate 11 is provided with a plurality of strip-shaped bulges to facilitate the installation of the lower connecting cylinder 13, the lower surface of the mounting plate 7 is in threaded connection with an upper fixing bolt 28, the upper fixing bolt 28 is used for fixing the upper fixing plate 1, the upper connecting cylinder 4 and the mounting plate 7, the middle part of the upper fixing bolt 28 is sleeved with an upper fixing cylinder 27, the upper fixing cylinder 27 is used for buffering the upper fixing bolt 28, when the upper fixing bolt 28 bears the vibration, the looseness cannot occur, the upper surface of the lower fixing plate 11 is in threaded connection with a lower fixing bolt 37, the lower fixing bolt 37 is used for fixing the lower fixing plate 11 and the lower connecting cylinder 13, the middle part of the lower fixing bolt 37 is sleeved with a lower fixing cylinder 38, the lower fixing cylinder 38 is used for buffering the lower fixing bolt 37, when the lower fixing bolt 37 bears the vibration, no loosening occurs.

In the embodiment, the upper surface of the upper connecting cylinder 4 and the lower surface of the lower connecting cylinder 13 are both provided with grouting holes 2, the upper surface of the upper connecting cylinder 4 and the lower surface of the lower connecting cylinder 13 are both provided with fixing holes 3, the upper surface of the upper connecting cylinder 4 is provided with two grouting holes 2 for filling expansion cement into the cavity of the upper connecting cylinder 4, the upper surface of the upper connecting cylinder 4 is provided with a plurality of fixing holes 3, the grouting holes 2 are positioned between the two fixing holes 3, the fixing holes 3 are used for installing bolts and are convenient to install, the lower surface of the lower connecting cylinder 13 is provided with grouting holes 2, the lower surface of the lower connecting cylinder 13 is provided with fixing holes 3, the grouting holes 2 are positioned between the two fixing holes 3, the fixing holes 3 are used for installing bolts and are convenient to install, the lower surface of the upper fixing plate 1 is fixedly connected with two upper baffles 6, the upper surface of the lower fixing plate 11 is fixedly connected with two lower baffles 10, the upper baffle 6 serves to protect the upper fixing plate 1, and the lower baffle 10 serves to protect the lower fixing plate 11.

In this embodiment, the rotary friction limiting device includes lower fixed disk 14, lower friction ring 15, go up friction ring 16 and upper fixed disk 17, the lower fixed surface of intermediate plate 18 is connected with upper fixed disk 17, the upper surface edge of upper fixed disk 17 has the protrusion, a plurality of through-holes have been seted up to the upper surface of upper fixed disk 17, be used for the installation, the lower fixed surface of upper fixed disk 17 is connected with upper friction ring 16, a plurality of holes have been seted up to the lower surface of upper fixed disk 17, be used for installing upper friction ring 16, the upper fixed surface of lower fixed plate 11 is connected with lower fixed disk 14, the upper fixed surface of lower fixed disk 14 is connected with lower friction ring 15, the lower surface edge of lower fixed disk 14 has the protrusion, a plurality of through-holes have been seted up to the lower surface of lower fixed disk 14, be used for installing lower friction ring 15, a plurality of holes have been seted up to the upper surface of lower fixed disk 14, be used for installing lower friction ring 15.

Rotating device is including rotating minor axis 29, rotating base 30, rotate lid 31, location lid 32, go up swivel ring 33, roll axis 34 and lower swivel ring 35, the lower fixed surface of intermediate plate 18 is connected with and rotates lid 31, the bottom fixedly connected with location lid 32 of rotating lid 31, swivel ring 33 is gone up to the bottom fixedly connected with of rotating lid 31, circular recess has been seted up to the lower surface of rotating lid 31, be used for installing swivel ring 33, the bottom swing joint who goes up swivel ring 33 has a plurality of swivel rings 33 of going up, the last fixed surface of lower fixed plate 11 is connected with and rotates minor axis 29, swivel ring 33 is gone up to the last fixed surface of rotating minor axis 29 is connected with, go up swivel ring 33 and the cooperation of last swivel ring 33 and use, can make the device can bear great load, simultaneously can rotate, thereby make the device can bear the moment of torsion load.

In this embodiment, a plurality of friction bulbs 36 are fixedly connected to the upper surface of the lower friction ring 15, the friction bulbs 36 are in mutual friction with the upper friction ring 16, a large friction force is generated, the rotation of the shock absorption and isolation support is limited, a limiting effect is achieved, a lubricating groove 43 is arranged in the damping cylinder 25 in a clamped mode, the lubricating groove 43 enables lubricating oil to flow in a cavity of the lubricating groove 43 in a circulating mode, a buffer groove 41 is formed in the damping cylinder 25, the buffer groove 41 is used for buffering damping liquid, a sealing ring 42 is formed in the outer wall of the damping piston 40, and the sealing ring 42 is used for enhancing the sealing performance of the damping piston 40.

The advantages of the second embodiment over the first embodiment are: the upper surface fixedly connected with of lower friction ring 15 has a plurality of friction bulb 36, friction bulb 36's effect is with last friction ring 16 looks mutual friction, produce great frictional force, the restriction subtracts the rotation of isolation bearing, play spacing effect, the inside card of damping section of thick bamboo 25 is equipped with lubrication groove 43, lubrication groove 43 can make lubricating oil flow at the cavity inner loop of lubrication groove 43, buffer tank 41 has been seted up to the inside of damping section of thick bamboo 25, buffer tank 41's effect is cushioned the damping fluid, sealing ring 42 has been seted up on damping piston 40's the outer wall, sealing ring 42's effect is the leakproofness of strengthening damping piston 40.

When this spacing type high-speed railway bridge of rotary friction subtracts isolation bearing uses, at first pour into connecting cylinder 4 and the cavity of connecting cylinder 13 down respectively with expansion cement through grout hole 2, through inserting the bolt in fixed orifices 3, the bottom fixed connection of connecting cylinder 4 and bridge on will, the support base fixed connection of connecting cylinder 13 and bridge down, the bolt of screwing up, wait until cement solidifies, expansion cement is full of the whole cavity of connecting cylinder 4 and connecting cylinder 13 down, make cement and bolt fully contact, make bolted connection's more firm, expansion cement has certain elasticity, also can cushion the influence of vibrations to the bolt.

When a high-speed rail passes through the bridge, the bridge vibrates, the vibration is transmitted to the seismic isolation and reduction support through the bridge deck, the vertical pressure load is pressed downwards, the upper connecting cylinder 4 extrudes the upper fixing plate 1, the upper fixing plate 1 extrudes the mounting plate 7, the mounting plate 7 extrudes the top plate 8 downwards, the top plate 8 extrudes the supporting column 9, the supporting column 9 deforms, the supporting column 9 has elasticity, the height becomes lower, the mounting plate 7 extrudes the first ball head base and the first ball head cover so as to extrude the upper ball head 39, the upper ball head 39 rotates and transmits the pressure to the connecting shaft 23, the connecting shaft 23 extrudes the threaded rod 24 so as to rotate the threaded rod 24, the threaded rod 24 is in threaded connection with the damping cylinder 25, therefore, the threaded rod 24 slides towards the inside of the damping cylinder 25, the length of the threaded rod 24 after being connected with the damping cylinder 25 is shortened, and the threaded rod 24 rotates relative to the damping cylinder 25, and lubricating oil is extruded, so that the lubricating oil circularly flows in the lubricating groove 43, the connecting part of the threaded rod 24 and the damping cylinder 25 is continuously lubricated and changed, the threaded rod 24 extrudes the damping piston 40, the damping piston 40 slides towards the bottom of the damping cylinder 25, damping liquid in the damping cylinder 25 is extruded, great pressure and resistance are generated, and the trend of downward overstocking is reduced.

When the bridge generates a pressure load which is not vertical, an oblique pressure load can be generated on the seismic isolation and reduction support, because the positions of the connecting shaft 23, the threaded rod 24, the damping cylinder 25, the lower ball head 26 and the upper ball head 39 are obliquely designed and installed and are symmetrically designed, when the seismic isolation and reduction support is extruded by the pressure loads from different directions, the device cannot be damaged rigidly, so that the compression resistance effect of the seismic isolation and reduction support is more stable, when the bridge is locally deformed, a torsion load can be generated, so that the supporting column 9 twists the arc-shaped disc 20, the arc-shaped disc 20 twists the sliding base 19, the sliding base 19 twists the intermediate plate 18, the intermediate plate 18 twists the upper fixed disc 17, the upper friction ring 16 is twisted, the upper friction ring 16 generates relative displacement between the lower friction ring 15, and the lower friction ring 15 generates relative friction on the upper friction ring 16, and generates a larger friction force, the messenger subtracts isolation bearing can not take place too big rotation, thereby the deformation of bridge because of the effect of torsional load produces has been restricted, because the load of bridge is very big, torsion load twists reverse intermediate plate 18, intermediate plate 18 twists reverse rotation lid 31, it twists reverse last rotating ring 33 to rotate lid 31, take place earlier to rotate between last rotating ring 33 and the lower rotating ring 35, because install roll axis 34 between last rotating ring 33 and the lower rotating ring 35 and make sliding friction become rolling friction, frictional force has been reduced, the top design that rotates minor axis 29 has the minor axis, peg graft in locating cover 32, play the effect of location.

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 spacing type high-speed railway bridge of rotatory friction subtracts isolation bearing, includes an upper fixed plate (1), its characterized in that: the lower surface of the upper fixing plate (1) is fixedly connected with a mounting plate (7), the lower surface of the mounting plate (7) is fixedly connected with a top plate (8), the bottom of the top plate (8) is fixedly connected with a support column (9), the bottom of the support column (9) is fixedly connected with an arc plate (20), the lower surface of the arc plate (20) is fixedly connected with a sliding base (19), the bottom of the sliding base (19) is fixedly connected with an intermediate plate (18), the lower surface of the intermediate plate (18) is fixedly connected with a rotary friction limiting device, the lower surface of the intermediate plate (18) is provided with a rotating device, the bottom of the rotary friction limiting device is fixedly connected with a lower fixing plate (11), the lower surface of the mounting plate (7) is fixedly connected with two first ball head bases, and the lower surface of the first ball head bases is fixedly connected with a first ball head cover, the inside of first bulb base rotates and is connected with bulb (39), the one end fixedly connected with connecting axle (23) of going up bulb (39), the other end of connecting axle (23) rotates and is connected with threaded rod (24), the other end fixedly connected with damping piston (40) of threaded rod (24), the mid portion threaded connection of threaded rod (24) has damping cylinder (25), bulb (26) under the other end fixedly connected with of damping cylinder (25), the bottom of bulb (26) is rotated and is connected with second bulb base (21) and second bulb lid (22) down.

2. The rotary friction limiting type high-speed rail bridge seismic isolation bearing according to claim 1, characterized in that: the upper surface joint of an upper fixing plate (1) has last connecting cylinder (4), the both sides joint of going up connecting cylinder (4) has a plurality of joint blocks (5) of going up, the bottom and an upper fixing plate (1) fixed connection of going up joint block (5), the lower surface joint of bottom plate (11) has lower connecting cylinder (13), the both sides joint of lower connecting cylinder (13) has a plurality of joint blocks (12) down, the bottom and the bottom of lower fixed plate (11) fixed connection of joint block (12) down, the lower surface threaded connection of mounting panel (7) has last fixing bolt (28), the mid portion of going up fixing bolt (28) has cup jointed last fixing cylinder (27), the upper surface threaded connection of bottom plate (11) has lower fixing bolt (37), the mid portion of lower fixing bolt (37) has cup jointed down fixing cylinder (38).

3. The rotary friction limiting type high-speed rail bridge seismic isolation bearing according to claim 2, characterized in that: grout hole (2) have all been seted up to the upper surface of going up connecting cylinder (4) and the lower surface of lower connecting cylinder (13), fixed orifices (3) have all been seted up to the upper surface of going up connecting cylinder (4) and the lower surface of lower connecting cylinder (13).

4. The rotary friction limiting type high-speed rail bridge seismic isolation bearing according to claim 1, characterized in that: the lower surface of the upper fixing plate (1) is fixedly connected with two upper baffles (6), and the upper surface of the lower fixing plate (11) is fixedly connected with two lower baffles (10).

5. The rotary friction limiting type high-speed rail bridge seismic isolation bearing according to claim 1, characterized in that: rotatory friction stop device includes lower fixed disk (14), lower friction ring (15), goes up friction ring (16) and upper fixed disk (17), the lower fixed surface of intermediate lamella (18) is connected with upper fixed disk (17), the lower fixed surface of upper fixed disk (17) is connected with upper friction ring (16), fixed disk (14) under the last fixed surface of lower fixed disk (11) is connected with, the last fixed surface of lower fixed disk (14) is connected with lower friction ring (15).

6. The rotary friction limiting type high-speed rail bridge seismic isolation bearing according to claim 1, characterized in that: rotating device is including rotating minor axis (29), rotating base (30), rotating lid (31), location lid (32), go up rotating ring (33), rolling axle (34) and lower rotating ring (35), the lower fixed surface of intermediate lamella (18) is connected with and rotates lid (31), the bottom fixedly connected with location lid (32) of rotating lid (31), rotating ring (33) on the bottom fixedly connected with of lid (31), the bottom of going up rotating ring (33) is rotated and is connected with a plurality of rolling axles (34), the last fixed surface of lower fixed plate (11) is connected with and rotates minor axis (29), rotating minor axis (29) under the last fixed surface of (29) is connected with.

7. The rotary friction limiting type high-speed rail bridge seismic isolation bearing according to claim 5, characterized in that: the upper surface of the lower friction ring (15) is fixedly connected with a plurality of friction ball heads (36).

8. The rotary friction limiting type high-speed rail bridge seismic isolation bearing according to claim 5, characterized in that: and a lubricating groove (43) is clamped in the damping cylinder (25).

9. The rotary friction limiting type high-speed rail bridge seismic isolation bearing according to claim 1, characterized in that: the damping cylinder (25) is internally provided with a buffer groove (41).

10. The rotary friction limiting type high-speed rail bridge seismic isolation bearing according to claim 1, characterized in that: and the outer wall of the damping piston (40) is provided with a sealing ring (42).