CN215104596U

CN215104596U - Cable type graded energy absorption type beam falling prevention device

Info

Publication number: CN215104596U
Application number: CN202120129797.0U
Authority: CN
Inventors: 朱元; 苏韩; 雷欢; 梁剑冰; 黄芳玮; 吴莲锋; 周俊文; 沈扬波
Original assignee: Liuzhou OVM Machinery Co Ltd
Current assignee: Liuzhou OVM Machinery Co Ltd
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2021-12-10
Anticipated expiration: 2031-01-18

Abstract

A pull rope type graded energy absorption type beam falling prevention device relates to a bridge beam falling prevention device, and comprises a pull rope and a moving end falling prevention device at least connected to one end of the pull rope, wherein a shearing type energy consumption pad and an energy absorption control assembly are sequentially arranged between a nut and an embedded backing plate of the moving end falling prevention device; the energy-absorbing control assembly comprises an energy-absorbing supporting tube and a wedge-shaped buffer block, the energy-absorbing supporting tube is a wave-shaped sleeve with the wall thickness gradually increased, a wave-shaped convex ring is arranged on the outer circle of the wedge-shaped buffer block, the wave-shaped convex ring is embedded with the wave-shaped inner wall of the energy-absorbing supporting tube, a wedge-shaped through hole with the diameter gradually reduced is arranged in the wedge-shaped buffer block, and a resettable elastic wedge block is arranged in the wedge-shaped through hole. The utility model discloses a big earthquake impact energy in the twinkling of an eye is absorbed in wave energy-absorbing structure gradable of energy-absorbing control subassembly, avoids the earthquake to strike in the twinkling of an eye and destroys the bridge construction. The utility model discloses still possess the spacing function of preventing falling in horizontal and two vertical positions, can realize two-way restraint in the earthquake and avoid the bridge to collapse.

Description

Cable type graded energy absorption type beam falling prevention device

Technical Field

The utility model relates to a roof beam device, especially a roof beam device is prevented falling by hierarchical energy-absorbing type of cable formula to bridge.

Background

Bridge engineering is an important component of life line engineering, and when a strong earthquake occurs, the phenomenon that an upper bridge falls off from a support often occurs, so that great difficulty is brought to disaster relief work after the earthquake, and secondary disasters are aggravated. In order to avoid such catastrophic damage, anti-drop devices are generally used in bridge design. The existing popular beam falling prevention device is a steel strand stay cable type beam falling prevention device which has various forms, simple structural formulas and buffering and energy absorption, but has some defects. For example, utility model patent of grant publication No. CN210368598U discloses a beam falling prevention device and beam falling prevention composite structure, which has a certain energy absorption function, but has the following disadvantages:

(1) the energy absorption buffer cylinder in the beam falling prevention device is of a smooth surface long cylinder structure, and when the energy absorption buffer cylinder is impacted and extruded by the wedge-shaped block, the smooth surface long cylinder is poor in stability and prone to instability. And the wedge-shaped block is an external conical surface extrusion contact section, so that smooth transition of the energy-absorbing buffer cylinder cannot be realized, and stress bending instability points are easy to appear at the conical surface of the inner hole of the energy-absorbing buffer cylinder and the straight cylinder switching part, so that cracking occurs in advance, and the wedge-shaped extrusion effect cannot be well generated. In addition, the smooth surface long round cylinder structure of the energy absorption buffer cylinder has limited radial deformation energy absorption degree, cannot play a role in buffering and grading energy absorption, and is easy to crack due to instant impact.

(2) The energy-absorbing buffer cylinder and the elastic buffer ring are of split structures, an integral structure cannot be formed, the deformation energy consumption cannot achieve the synchronous effect, and the elastic body cannot play a good wrapping anticorrosion effect on the inner wall of the energy-absorbing buffer cylinder.

(3) The anti-falling beam system can only be installed in the inner cavity of the box beam, can only realize the limiting and anti-falling effects of the horizontal direction, cannot realize the synchronous limit of the vertical direction, and has single function.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: the pull-rope type graded energy-absorbing beam falling-preventing device can absorb the transient impact energy of the earthquake in a graded manner.

The technical scheme for solving the technical problems is as follows: a pull rope type graded energy absorption type beam falling prevention device comprises a pull rope and a moving end falling prevention device at least connected to one end of the pull rope, wherein the moving end falling prevention device comprises a nut, an anchoring sleeve A and an embedded base plate, and a shear type energy consumption pad and an energy absorption control assembly are sequentially arranged between the nut and the embedded base plate; the energy absorption control assembly comprises an energy absorption supporting pipe and a wedge-shaped buffer block arranged in the energy absorption supporting pipe, the energy absorption supporting pipe is a wave-shaped sleeve with the wall thickness gradually increased, a wave-shaped convex ring is arranged on the excircle of the wedge-shaped buffer block and is embedded with the wave-shaped inner wall of the energy absorption supporting pipe, a wedge-shaped through hole with the diameter gradually reduced is arranged in the wedge-shaped buffer block, and a resettable elastic wedge block is arranged at the large end of the wedge-shaped through hole; the maximum diameter of the resettable elastic wedge is larger than that of the shear type energy dissipation pad.

The utility model discloses a further technical scheme is: the shear type energy consumption pad adopts a coupling structure of damping rubber and layered shear-resistant energy-absorbing meshes, the layered shear-resistant energy-absorbing meshes are pre-bent arc-shaped spring meshes which are arranged in multiple layers, and the layered shear-resistant energy-absorbing meshes are embedded into the damping rubber to form a whole.

The utility model discloses a further technical scheme is: the resettable elastic wedge block comprises an elastic wedge block, a reset spring and a wedge-shaped supporting frame; the large end face of the elastic wedge block is attached to the end face of the shear type energy consumption pad, the small end of the elastic wedge block is installed in the wedge-shaped supporting frame, the reset spring is embedded in the elastic wedge block, and the end part of one end of the reset spring is abutted to the bottom of the wedge-shaped supporting frame; the wedge excircle of wedge carriage cooperatees with the wedge through-hole of wedge buffer block.

The utility model discloses a further technical scheme is: and a moving compression distance of H = 100-1000 mm is formed between the resettable elastic wedge block and the end face of the small end of the wedge-shaped through hole of the wedge-shaped buffer block.

The utility model discloses a further technical scheme is again: the other end of cable be connected with stiff end and prevent falling the device, this stiff end prevents falling the device and includes anchor cover B, fork ear I, hinged support, anchor cover B be connected with the cable anchor, anchor cover B is connected with the one end of fork ear I, the other end of fork ear I is articulated with hinged support, hinged support fixes on the bridge.

The utility model discloses a further technical scheme is again: the pull rope type graded energy absorption type beam falling prevention device further comprises a vertical beam falling prevention device, the vertical beam falling prevention device comprises a fork lug II, a vertical limiting rope and a single-hole vertical hinged support, the single-hole vertical hinged support is fixed at the lower end of the bridge, the lower end of the vertical limiting rope is hinged to the single-hole vertical hinged support through the fork lug II, and the upper end of the vertical limiting rope is hinged to the hinged support through the fork lug II.

The utility model discloses a further technical scheme is again: the vertical hinged support of haplopore include fixing support, T shape connecting plate, fixing support on along vertical division have T type groove, the head of T shape connecting plate is installed and can be followed T type groove and slided from top to bottom in this T type inslot, still along transversely having seted up U type adjustment tank on the T shape connecting plate, the vertical hinged support of haplopore is articulated with fork ear II through the connecting pin of installing in U type adjustment tank.

The utility model discloses a further technical scheme is again: the hinged support comprises a pre-buried fixing seat and a porous bidirectional hinged support, the pre-buried fixing seat is fixed on a bridge, a first pin hole, a second pin hole and a third pin hole are formed in the porous bidirectional hinged support, the first pin hole is connected with the pre-buried fixing seat through a connecting pin, the second pin hole is hinged with the fork lug I through the connecting pin, and the third pin hole is hinged with the fork lug II through the connecting pin.

Owing to adopt above-mentioned structure, the utility model discloses a hierarchical energy-absorbing type of cable formula prevents beam falling device compares with prior art, has following beneficial effect:

1. can absorb the earthquake transient impact energy in stages

The moving end anti-falling device of the utility model is provided with a shearing type energy dissipation pad and an energy absorption control assembly between the nut and the pre-buried backing plate in sequence; the energy-absorbing control assembly comprises an energy-absorbing supporting pipe and a wedge-shaped buffering block arranged in the energy-absorbing supporting pipe, the energy-absorbing supporting pipe is a wave-shaped sleeve with the wall thickness gradually increased, a wave-shaped convex ring is arranged on the excircle of the wedge-shaped buffering block and is embedded with the wave-shaped inner wall of the energy-absorbing supporting pipe, a wedge-shaped through hole with the diameter gradually reduced is arranged in the wedge-shaped buffering block, and a resettable elastic wedge block is arranged at the large end of the wedge-shaped through hole. When an earthquake occurs, the wedge-shaped excircle of the resettable elastic wedge block generates wedge-shaped extrusion force on the energy absorption supporting tube, when the earthquake force at the initial stage of the earthquake is small, the wave-shaped energy absorption structure with the thin wall at the front section of the energy absorption supporting tube starts to absorb shock waves, when the earthquake shock wave capability is increased, the wave-shaped energy absorption structure with the thick wall at the rear section of the energy absorption supporting tube starts to generate permanent plastic deformation with radial enlargement, and the instantaneous earthquake shock energy is converted into the internal energy of the physical deformation of the energy absorption supporting tube layer by layer in a grading manner, so that the damage of the earthquake shock force to the bridge structure can be effectively reduced.

2. Can improve the stability of the energy absorption control assembly

The utility model discloses an energy-absorbing stay tube is the wave sleeve that the wall thickness increases in grades, the excircle of wedge buffer block is equipped with the wave bulge loop, form a whole through the wave bulge loop with the wedge buffer block mutually with the wave inner wall of energy-absorbing stay tube, not only can improve the stability of energy-absorbing control subassembly greatly, still can make the energy-absorbing stay tube, the wedge buffer block has synchronous deformation power consumption, still can make the wedge buffer block play fine parcel anticorrosion effect to the energy-absorbing buffer cylinder inner wall in addition.

3. Can produce better wedge-shaped extrusion effect

The utility model discloses a still be equipped with the wedge through-hole that the diameter reduces gradually in the wedge cushion block, whole wedge through-hole smooth transition is when receiving the extrusion of the elastic wedge that can reset, does not have stress buckling unstability point, can avoid taking place the phenomenon of fracture in advance, can produce better wedge extrusion effect.

4. Is favorable for energy consumption and meets the requirement of deformation space

The utility model discloses an energy-absorbing control subassembly produces the hierarchical plastic deformation of radial ladder through the wave structure, reaches the effect of the absorption earthquake impact force of hierarchical deformation and layering, has wherein still designed the removal compression space of H value, does benefit to power consumption deformation space demand, possesses the free accommodation space of normal expend with heat and contract with cold between certain case beam structure.

5. Can realize the replacement of the single body

The utility model discloses an energy-absorbing control subassembly includes the energy-absorbing stay tube, installs the wedge buffer block in the energy-absorbing stay tube, installs the elastic wedge that can reset in the wedge through-hole of wedge buffer block. Because the energy-absorbing supporting tube, the wedge-shaped buffer block and the resettable elastic wedge block are of split structures, the replacement of a single body can be realized after an earthquake, and the maintenance cost can be greatly saved.

6. Good damping effect

When the earthquake takes place, normal displacement change period appears in the case roof beam, the utility model discloses remove the nut extrusion shear type power consumption pad of end anti-falling device and take place the compression, because shear type power consumption pad adopts damping rubber and the layering coupling structure of the energy-absorbing net piece that shears, wherein the layering energy-absorbing net piece that shears is the pre-bending arc spring net piece that the multilayer was arranged, this layering energy-absorbing net piece that shears imbeds and forms a whole in damping rubber, after the earthquake is produced, the anti-shear change of stress emergence of pre-bending arc spring net piece, until the whole shear fracture of pre-bending arc spring net piece by the nut. And then the elastic wedge blocks capable of resetting are also elastically deformed and extruded, so that preliminary deformation is realized to meet the moving requirement of a displacement space. When earthquake impact damage energy is increased and the generated displacement exceeds the deformation movement amount of the rubber support, the shear type energy consumption cushion is compressed extremely, so that the box beam is separated from the force which is obliquely transmitted to the inhaul cable, the resettable elastic wedge block and the energy absorption control assembly simultaneously play a role, the resettable elastic wedge block and the energy absorption control assembly absorb the energy through the deformation of the energy absorption elastic body per se and then extrude and rub the inner wall of the energy absorption supporting tube through the mutual wedge, and accordingly the wavy outer wall of the energy absorption supporting tube is gradually opened to buffer the earthquake wave energy consumed by deformation, the function of gradually absorbing the earthquake energy is realized, the instant impact damage to the anti-falling beam device and the concrete beam structure is avoided, and the earthquake energy consumption performance is excellent even in large earthquakes.

7. Can absorb extremely large load in short stroke and small space

The utility model discloses a shear type power consumption pad adopts damping rubber and the layering coupling structure of energy-absorbing net piece that shears, and wherein the layering energy-absorbing net piece that shears is the pre-bending arc spring net piece that the multilayer was arranged, and this layering energy-absorbing net piece that shears imbeds and forms a whole in damping rubber. The shear type energy dissipation pad can assist in playing a role in buffering and protecting the inhaul cable from shock waves caused by earthquakes, the pre-bent arc-shaped spring net piece is utilized to bear great load in a small space, and particularly when the pre-bent arc-shaped spring net piece is combined in a laminated mode, the effect of absorbing impact and dissipating energy is more remarkable due to the effect of surface friction resistance, and the influence of insufficient energy absorption of a common single rubber buffer is improved.

8. Can realize deformation of normal bridge structures and reset

The utility model discloses a resettable elastic wedge block which comprises an elastic wedge block, a reset spring and a wedge-shaped supporting frame; the large end face of the elastic wedge block is attached to the end face of the shear type energy consumption pad, the small end of the elastic wedge block is installed in the wedge-shaped supporting frame, the reset spring is embedded in the elastic wedge block, and the end part of one end of the reset spring is abutted to the bottom of the wedge-shaped supporting frame; the wedge excircle of wedge carriage cooperatees with the wedge through-hole of wedge buffer block. When the earthquake impact force takes place, utilize the high damping rubber material characteristic of elasticity voussoir and the mutual integration characteristics of spring, the extrusion is cuted each other to two structures, can effectual absorption and cushion earthquake impact force in the twinkling of an eye, the effectual destruction degree that has reduced the earthquake, after the earthquake disappears, utilizes the elasticity reset function of reset spring itself again can reset, realizes reuse's benefit. In addition, the return spring is embedded in the elastic wedge block, so that the durability of the return spring is improved, and the reuse is facilitated.

9. Possesses spacing function of preventing falling of two-way displacement

The utility model discloses except transversely preventing the roof beam device that falls, the vertical roof beam device that falls of preventing has still been designed, and through designing the hinged support for porous two-way hinged support, can realize transversely preventing falling the roof beam device and vertically preventing falling being connected between the roof beam device, thereby possess the spacing effect of preventing falling that realizes horizontal and two vertical positions, when realizing that normal bridge structures's deformation resets, also can realize that two-way restraint avoids the bridge to collapse in the earthquake, it prevents falling the synchronous spacing of the existence can not be to vertical realization to have solved ordinary roof beam unidirectional restraint that falls, the weak point of function singleness.

10. Reasonable structure

The utility model discloses a vertical roof beam device that prevents falling includes fork ear II, vertical spacing cable, the vertical hinged support of haplopore, wherein, the vertical hinged support of haplopore includes fixing support, T shape connecting plate, vertical the opening along on the fixing support has T type groove, the head of T shape connecting plate is installed and can be followed T type inslot and slided from top to bottom, still along transversely having seted up U type adjustment tank on the T shape connecting plate, the vertical hinged support of haplopore is through installing the connecting pin in U type adjustment tank and fork ear II is articulated. The utility model discloses a vertical T type groove and horizontal U type adjustment tank are favorable to guaranteeing the normal activity space of vertical spacing cable, make it can be in vertical and horizontal free slip adjustment, adapt to the daily needs that transversely and the self-adaptation displacement in two vertical positions changes of case roof beam, and be unlikely to the cable and be blocked dead can not move about.

11. Convenient disassembly, assembly and maintenance

The fixed end anti-falling device comprises a fork lug I, an anchoring sleeve B and a hinged support, and the vertical anti-falling beam device comprises a fork lug II, a vertical limiting cable and a single-hole vertical hinged support; wherein, the hinged support comprises a porous bidirectional hinged support; can be articulated with fork ear I, the fork ear II of connection on vertical spacing cable of connection on the cable respectively, realize the effect of horizontal roof beam device and the vertical roof beam device connection of preventing falling to articulated connected mode dismouting and maintenance are also convenient.

12. Flexibility with free space transformation

The utility model discloses both can realize that case roof beam and case roof beam are connected, also can realize the connection of case roof beam and pier. In addition the utility model discloses both can set up in the case roof beam, also can set up outside the case roof beam, have the flexibility that free space shifted.

The technical features of the cable-type graded energy-absorbing beam-falling prevention device of the present invention will be further described with reference to the accompanying drawings and examples.

Drawings

FIG. 1: embodiment a schematic structural view of a stay cable type graded energy absorption type beam falling prevention device,

FIG. 2: the structure schematic diagram of the mobile terminal anti-falling device of the utility model,

FIG. 3: the structure of the shearing energy consumption pad of the utility model is schematically shown,

FIG. 4: the structure schematic diagram of the resettable elastic wedge block of the utility model,

FIG. 5: the structure schematic diagram of the energy absorption control component of the utility model,

FIG. 6: second embodiment a schematic structural view of a stay cable type graded energy absorbing type beam falling prevention device,

FIG. 7: third embodiment is a schematic structural diagram of a stay cable type graded energy absorption type anti-falling beam device with bidirectional displacement limiting and anti-falling functions,

FIG. 8: third embodiment a front view of a single-hole vertical hinged support,

FIG. 9: the top cross-sectional view of figure 8,

FIG. 10: third embodiment the articulated support is schematically shown in the figure,

FIG. 11: in the third embodiment, the utility model is a schematic diagram for comparing the use states before and after an earthquake;

in the above drawings, the respective reference numerals are explained as follows:

1-a mobile terminal anti-drop device,

11-a nut, 12-an anchoring sleeve A,

13-shearing energy dissipation cushion, 131-damping rubber, 132-layered anti-shearing energy absorption net sheet,

14-resettable resilient wedge, 141-resilient wedge, 142-return spring, 143-wedge support frame,

15-an energy absorption control component, 151-an energy absorption supporting pipe,

152-a wedge-shaped buffer block, 1521-a wave-shaped convex ring, 1522-a wedge-shaped through hole,

16-pre-burying a base plate,

2-a pulling rope is arranged at the front end of the rope,

3-a fixed end anti-falling device,

31-anchoring sleeves B, 32-fork lugs I, 33-hinged supports, 331-embedded fixed seats,

332-porous bi-directional hinged support, 3321-first pin hole, 3322-second pin hole, 3323-third pin hole,

34-fixed end nut, 35-fixed end anchor sleeve, 36-fixed end cushion pad, 37-fixed end embedded backing plate,

4-a vertical beam-falling prevention device,

41-fork ear II, 42-vertical spacing cable,

43-single-hole vertical hinged support, 431-fixed support, 4311-T groove,

432-T-shaped connecting plate, 4321-U-shaped adjusting groove,

5-first box girder, 6-second box girder, 7-pier,

a-the using state of the utility model before earthquake, B-the using state of the utility model during earthquake,

h-the moving compression distance before earthquake, H2-the moving compression distance at earthquake,

the moving distance of the second box girder during the L-earthquake,

l1-distance between the hinge point of the single-hole vertical hinged support and the fork ear II and the end face of the pier before earthquake,

l2-distance between the hinge point of the single-hole vertical hinged support and the fork lug II and the end face of the pier during earthquake.

Detailed Description

Example one

Disclosed in fig. 1 is a pull-rope type classified energy-absorbing type beam-falling prevention device, including pull rope 2, connect at the removal end of 2 one ends of pull rope prevent device 1, connect at the stiff end of 2 other ends of pull rope prevent device 3 that falls, wherein:

the moving end anti-falling device 1 comprises a nut 11, an anchoring sleeve A12 and an embedded backing plate 16, wherein the anchoring sleeve A12 is anchored and connected at one end of the inhaul cable 2, the nut 11 is installed on the anchoring sleeve 12, and the embedded backing plate 16 is embedded in the first box girder 5 of the bridge. A shear type energy dissipation pad 13 and an energy absorption control assembly 15 (see fig. 2) are sequentially arranged between the nut 11 and the pre-buried base plate 16;

the shear-type energy dissipation pad 13 adopts a coupling structure of damping rubber 131 and layered shear-resistant energy-absorbing meshes 132, the layered shear-resistant energy-absorbing meshes 132 are pre-bent arc-shaped spring meshes arranged in multiple layers, and the layered shear-resistant energy-absorbing meshes 132 are embedded in the damping rubber 131 to form a whole (see fig. 3).

The energy absorption control assembly 15 comprises an energy absorption supporting pipe 151 and a wedge-shaped buffer block 152 (see fig. 5) arranged in the energy absorption supporting pipe 151, wherein the energy absorption supporting pipe 151 is a wave-shaped steel sleeve with the wall thickness gradually increased, the wall thickness of the energy absorption supporting pipe 151 is divided into two stages, the wall thickness of the front section is h1, the wall thickness of the rear section is h2, and h1 is less than h 2; the outer circle of the wedge-shaped buffer block 152 is provided with a wave-shaped convex ring 1521, the wave-shaped convex ring 1521 is embedded with the wave-shaped inner wall of the energy-absorbing support pipe 151, a wedge-shaped through hole 1522 with gradually reduced diameter is arranged in the wedge-shaped buffer block 152, the large end of the wedge-shaped through hole 1522 is provided with a resettable elastic wedge block 14, and the maximum diameter of the resettable elastic wedge block 14 is larger than that of the shear-type energy consumption pad 13.

The resettable elastic wedge 14 comprises an elastic wedge 141, a reset spring 142 and a wedge-shaped support frame 143 (see fig. 4); the large end face of the elastic wedge 141 is attached to the end face of the shear type energy consumption pad 13, the small end of the elastic wedge 141 is installed in the wedge-shaped support frame 143, the return spring 142 is embedded in the elastic wedge 141, and the end of one end of the return spring 142 abuts against the frame bottom of the wedge-shaped support frame 143; the wedge-shaped outer circle of the wedge-shaped supporting frame 143 is fitted with the wedge-shaped through hole 1522 of the wedge-shaped buffer block 152. The resettable elastic wedge 14 and the small end face of the wedge-shaped through hole 1522 of the wedge-shaped buffer block 152 have a moving compression distance of H =300mm, and the moving compression distance = the moving distance of the support + the edge distance of the pier.

The cable 2 is the prior art, and will not be described in detail here.

The stiff end anti-falling device 3 adopt the prior art commonly used, including stiff end nut 34, stiff end anchor cover 35, stiff end blotter 36, the pre-buried backing plate 37 of stiff end pre-buried in the second case roof beam 6 of the relative bridge of the horizontal level of the end anti-falling device 1 that removes, stiff end anchor cover 35 anchor is connected at the other end of cable 2, stiff end nut 34 is installed on stiff end anchor cover 35, stiff end blotter 36 is installed between stiff end nut 34 and stiff end pre-buried backing plate 37.

As a variation of the first embodiment, the other end of the cable 2 may be connected to the movable end falling preventive device 1 instead of the fixed end falling preventive device 3.

Example two

Disclosed in fig. 6 is another kind of pull rope type hierarchical energy-absorbing type beam device that falls, including pull rope 2, connect at the removal end of 2 one ends of pull rope and prevent falling device 1, connect at the stiff end of 2 other ends of pull rope and prevent falling device 3, wherein:

the moving end anti-falling device 1 comprises a nut 11, an anchoring sleeve A12 and an embedded backing plate 16, wherein the anchoring sleeve A12 is connected to one end of the inhaul cable 2 in an anchoring mode, the nut 11 is installed on the anchoring sleeve 12, and the embedded backing plate 16 is embedded in the first box girder 5 and the pier 7 of the bridge. A shear type energy dissipation pad 13 and an energy absorption control assembly 15 (see fig. 2) are sequentially arranged between the nut 11 and the pre-buried base plate 16;

The resettable elastic wedge 14 comprises an elastic wedge 141, a reset spring 142 and a wedge-shaped support frame 143 (see fig. 4); the large end face of the elastic wedge 141 is attached to the end face of the shear type energy consumption pad 13, the small end of the elastic wedge 141 is installed in the wedge-shaped support frame 143, the return spring 142 is embedded in the elastic wedge 141, and the end of one end of the return spring 142 abuts against the frame bottom of the wedge-shaped support frame 143; the wedge-shaped outer circle of the wedge-shaped supporting frame 143 is fitted with the wedge-shaped through hole 1522 of the wedge-shaped buffer block 152. The resettable elastic wedge 14 and the small end face of the wedge-shaped through hole 1522 of the wedge-shaped buffer block 152 have a moving compression distance of H =500mm, and the moving compression distance = the moving distance of the support + the edge distance of the pier.

The cable 2 is the prior art, and will not be described in detail here.

The fixed end anti-falling device 3 comprises an anchoring sleeve B31, a fork ear I32 and an articulated support 33, the anchoring sleeve B31 is connected with the inhaul cable 2 in an anchoring mode, the anchoring sleeve B31 is connected with one end of the fork ear I32, the other end of the fork ear I32 is hinged to the articulated support 33, and the articulated support 33 is embedded in the second box girder 6 of the bridge.

EXAMPLE III (best mode)

Disclosed in fig. 7 is a pull-rope type classified energy-absorbing type anti-falling beam device with bidirectional displacement limiting anti-falling function, including a transverse anti-falling beam device and a vertical anti-falling beam device 4, the transverse anti-falling beam device is embodiment two the pull-rope type classified energy-absorbing type anti-falling beam device, including a pull rope 2, a moving end connected to one end of the pull rope 2 is provided with an anti-falling device 1, and a fixed end connected to the other end of the pull rope 2 is provided with an anti-falling device 3, wherein:

The cable 2 is the prior art, and will not be described in detail here.

Fixed end anti-falling device 3 include anchor cover B31, fork ear I32, hinged support 33, anchor cover B31 be connected with cable 2 anchor, anchor cover B31 is connected with the one end of fork ear I32, hinged support 33 include pre-buried fixing base 331, porous two-way hinged support 332, pre-buried fixing base 331 pre-buried fix on the second case roof beam 6 of bridge, seted up first pinhole 3321, second pinhole 3322, third pinhole 3323 on the porous two-way hinged support 332, wherein first pinhole 3321 is connected with pre-buried fixing base 331 through the connecting pin, second pinhole 3322 through the connecting pin with the other end of fork ear I32 articulated.

The vertical beam falling prevention device 4 comprises a fork lug II 41, a vertical limiting cable 42 and a single-hole vertical hinged support 43, the single-hole vertical hinged support 43 is fixed at the lower end of the pier, the single-hole vertical hinged support 43 comprises a fixed support 431 and a T-shaped connecting plate 432, a T-shaped groove 4311 is vertically formed in the fixed support 431, the head of the T-shaped connecting plate 432 is installed in the T-shaped groove 4311 and can slide up and down along the T-shaped groove 4311, a U-shaped adjusting groove 4321 is further transversely formed in the T-shaped connecting plate 432, the single-hole vertical hinged support 43 is hinged to the fork lug II 41 at the lower end through a connecting pin installed in the U-shaped adjusting groove 4321, the upper end and the lower end of the vertical limiting cable 42 are respectively connected with the fork lugs II 41 at the upper end and the lower end, and the fork II 41 at the upper end is hinged to a third pin hole 3323 of the hinged support 33 through the connecting pin.

In the third embodiment, the specific installation and construction process of the stay cable type graded energy absorption type beam falling prevention device with the bidirectional displacement limiting and falling prevention functions is as follows:

firstly, the energy absorption control assembly 15, the embedded base plate 16, the articulated support 33 and the single-hole vertical articulated support 43 are embedded in a box girder and a pier of a bridge.

In a second step, the cable 2 is threaded into the horizontal cable-passing opening and the fork lug i 32 is fixed to the articulated support 33.

Thirdly, other corresponding components of the moving end anti-falling device 1 are sequentially penetrated into the inhaul cable 2, the elastic wedge block 14 capable of resetting is embedded into the inner cavity of the energy absorption control assembly 15, and then the shear type energy consumption pad 13 and the nut 11 are installed in place.

And fourthly, mounting a vertical beam falling prevention device, and hinging the upper end and the lower end of a vertical limiting cable 42 with the hinged support 33 and the single-hole vertical hinged support 43 through fork lugs II 41 respectively.

The utility model discloses a comparison schematic diagram of user state before and after the earthquake is shown in fig. 11, and can be seen from this fig. 11, when the earthquake, the moving distance of second case roof beam 6 is L, and shear type power consumption pad 13, resettable elastic wedge 14 of removal end anti-falling device 1 take place to consume energy and warp, and the moving compression distance is reduced from H to H2; the distance between the hinge point of the single-hole vertical hinged support 43 and the fork ear II 41 and the end surface of the pier 7 is adjusted to be L2 from L1, so that the normal activity space of the vertical limiting cable is guaranteed.

As a variation of the first embodiment to the third embodiment, the moving compression distance H may take any value within 100-1000 mm, such as 100mm, 200 mm, 400 mm, 800 mm, 1000mm, etc.

As another variation of the first to third embodiments, the wall thickness of the energy-absorbing support tube 151 can be further divided into three stages, four stages and five stages … … according to actual needs.

The working principle of the utility model is as follows:

when the earthquake takes place, normal displacement change period appears in the case roof beam, the utility model discloses remove the nut extrusion shear type power consumption pad of end anti-falling device and take place the compression, because shear type power consumption pad adopts damping rubber and the layering coupling structure of the energy-absorbing net piece that shears, wherein the layering energy-absorbing net piece that shears is the pre-bending arc spring net piece that the multilayer was arranged, this layering energy-absorbing net piece that shears imbeds and forms a whole in damping rubber, after the earthquake is produced, the anti-shear change of stress emergence of pre-bending arc spring net piece, until the whole shear fracture of pre-bending arc spring net piece by the nut. And then the elastic wedge blocks capable of resetting are also elastically deformed and extruded, so that preliminary deformation is realized to meet the moving requirement of a displacement space. When earthquake impact damage energy is enlarged, the generated displacement exceeds the deformation movement amount of the rubber support, the shear type energy consumption cushion is compressed extremely, so that the box beam is separated from the force which is obliquely transmitted to the inhaul cable, the resettable elastic wedge block and the energy absorption control assembly simultaneously start to play a role, the resettable elastic wedge block and the energy absorption control assembly absorb energy through the deformation of the self energy absorption elastomer, and then the wedge-shaped extrusion friction effect is realized, so that the wedge-shaped buffer block of the energy absorption control assembly extrudes the inner wall of the energy absorption supporting tube, and the wave-shaped outer wall of the energy absorption supporting tube is gradually opened to realize the buffering of the earthquake wave energy consumed by deformation.

When an earthquake continuously occurs, along with the continuous increase of deformation, the impact destructive force generated by the earthquake on the box girder can continuously damage and deform the energy absorption supporting tube 151, corresponding energy is absorbed and consumed, the maximum deformation is limited in the inner cavity of the box girder structure finally, an integral structure is formed, the first box girder, the second box girder or the girder pier are connected into a whole to resist the damage of the earthquake together, and the pier is prevented from falling off.

When horizontal roof beam device that prevents to fall the roof beam, vertical roof beam device that prevents to fall's spacing cable also plays the effect simultaneously, through three structure components combined action of hinged support 33, vertical spacing cable 42, the vertical hinged support 43 of haplopore for box girder and pier are even an organic whole in city, restrict the box girder and produce and beat or outside slippage.

Claims

1. The utility model provides a roof beam device is prevented falling by hierarchical energy-absorbing type of cable formula, includes cable (2), connects at least that the removal of cable (2) one end is held and is prevented falling device (1), should remove and hold and prevent falling device (1) including nut (11), anchor cover A (12), pre-buried backing plate (16), its characterized in that: a shear type energy dissipation pad (13) and an energy absorption control assembly (15) are sequentially arranged between the nut (11) and the embedded backing plate (16); the energy-absorbing control assembly (15) comprises an energy-absorbing supporting pipe (151) and a wedge-shaped buffer block (152) arranged in the energy-absorbing supporting pipe (151), wherein the energy-absorbing supporting pipe (151) is a wave-shaped sleeve with the wall thickness gradually increased, a wave-shaped convex ring (1521) is arranged on the excircle of the wedge-shaped buffer block (152), the wave-shaped convex ring (1521) is embedded with the wave-shaped inner wall of the energy-absorbing supporting pipe (151), a wedge-shaped through hole (1522) with the diameter gradually reduced is arranged in the wedge-shaped buffer block (152), and a resettable elastic wedge block (14) is arranged at the large end of the wedge-shaped through hole (1522); the maximum diameter of the resettable elastic wedge block (14) is larger than the maximum diameter of the shear type energy dissipation pad (13).

2. The stay-cord type graded energy-absorbing beam-falling preventing device according to claim 1, characterized in that: the shear type energy consumption pad (13) adopts a coupling structure of damping rubber (131) and layered shear-resistant energy-absorbing meshes (132), the layered shear-resistant energy-absorbing meshes (132) are pre-bent arc-shaped spring meshes which are arranged in a multilayer mode, and the layered shear-resistant energy-absorbing meshes (132) are embedded into the damping rubber (131) to form a whole.

3. The stay-cord type graded energy-absorbing beam-falling preventing device according to claim 1, characterized in that: the resettable elastic wedge block (14) comprises an elastic wedge block (141), a reset spring (142) and a wedge-shaped supporting frame (143); the large end face of the elastic wedge block (141) is attached to the end face of the shear type energy consumption pad (13), the small end of the elastic wedge block (141) is installed in the wedge-shaped supporting frame (143), the return spring (142) is embedded in the elastic wedge block (141), and the end part of one end of the return spring (142) abuts against the frame bottom of the wedge-shaped supporting frame (143); the wedge-shaped excircle of the wedge-shaped supporting frame (143) is matched with the wedge-shaped through hole (1522) of the wedge-shaped buffer block (152).

4. The stay-cord type graded energy-absorbing beam-falling preventing device according to claim 1, characterized in that: and a moving compression distance H = 100-1000 mm is formed between the resettable elastic wedge block (14) and the small end face of the wedge-shaped through hole (1522) of the wedge-shaped buffer block (152).

5. The stay-cord type graded energy absorbing type beam falling prevention device according to claim 1 or 2 or 3 or 4, wherein: the other end of cable (2) be connected with stiff end and prevent falling device (3), this stiff end prevents falling device (3) including anchor cover B (31), fork ear I (32), articulated bearing (33), anchor cover B (31) be connected with cable (2) anchor, anchor cover B (31) are connected with the one end of fork ear I (32), the other end and the articulated bearing (33) of fork ear I (32) are articulated, articulated bearing (33) are fixed on the bridge.

6. The stay-cord type graded energy-absorbing beam-falling prevention device according to claim 5, wherein: this hierarchical energy-absorbing type of stay cord formula prevents beam device that falls still including vertical beam device (4) that prevents falling, vertical beam device (4) that prevents falling including fork ear II (41), vertical spacing cable (42), the vertical hinged support of haplopore (43) fix the lower extreme at the bridge, the lower extreme of vertical spacing cable (42) articulates on the vertical hinged support of haplopore (43) through fork ear II (41), the upper end of vertical spacing cable (42) articulates on hinged support (33) through fork ear II (41).

7. The stay-cord type graded energy-absorbing beam-falling prevention device according to claim 6, wherein: the vertical hinged support (43) of haplopore include fixed bolster (431), T shape connecting plate (432), fixed bolster (431) go up along vertical opening T type groove (4311), the head of T shape connecting plate (432) is installed in this T type groove (4311) and can be followed T type groove (4311) and slided from top to bottom, U type adjusting groove (4321) have still been seted up along transversely on T shape connecting plate (432), the vertical hinged support (43) of haplopore is articulated with fork ear II (41) through the connecting pin of installing in U type adjusting groove (4321).

8. The stay-cord type graded energy-absorbing type beam falling prevention device according to claim 7, characterized in that: articulated support (33) including pre-buried fixing base (331), porous two-way articulated support (332), pre-buried fixing base (331) fix on the bridge, first pinhole (3321), second pinhole (3322), third pinhole (3323) have been seted up on porous two-way articulated support (332), wherein first pinhole (3321) are connected with pre-buried fixing base (331) through the connecting pin, second pinhole (3322) through the connecting pin with fork ear I (32) articulated, third pinhole (3323) through the connecting pin with fork ear II (41) articulated.