阅读说明：本技术 一种桥梁防坠落约束阻尼器 (Bridge anti-falling constraint damper ) 是由 苏毅 李中义 郭鹏 卢伟 张冲 于 2019-10-16 设计创作，主要内容包括：本发明公开了一种桥梁防坠落约束阻尼器,属于结构减震技术领域。主体包括固定单元以及类注射器耗能单元。当阻尼器受到可承受范围内的地震作用发生伸长形变时,迫使活塞运动,此时油腔内液体被抽入活塞腔,起到耗能作用；当阻尼器受到可承受范围内的地震作用发生压缩形变时,迫使活塞运动,此时活塞腔内粘性液体受到挤压进入油腔,起到耗能作用。当阻尼器受到过大的地震作用时,活塞与活塞腔壁发生碰撞,此时结构锁死,达到防止桥梁坠落的作用。本发明在小位移情况下起到有效的耗能作用,在大位移情况下结构锁死起到防坠落的作用,并且强震后拆卸方便,便于实现主体结构的快速修复。(The invention discloses a bridge anti-falling restraint damper, and belongs to the technical field of structural shock absorption. The main body comprises a fixing unit and an injector-like energy consumption unit. When the damper is subjected to the earthquake action within a bearable range and is subjected to extension deformation, the piston is forced to move, and at the moment, the liquid in the oil cavity is pumped into the piston cavity to play a role in energy consumption; when the damper is compressed and deformed under the action of an earthquake within a bearable range, the piston is forced to move, and at the moment, viscous liquid in the piston cavity is extruded into the oil cavity, so that the energy dissipation effect is achieved. When the damper is subjected to the action of an overlarge earthquake, the piston collides with the wall of the piston cavity, and the structure is locked at the moment, so that the effect of preventing the bridge from falling is achieved. The invention has effective energy consumption effect under the condition of small displacement, has the function of falling prevention under the condition of large displacement due to the locking of the structure, is convenient to disassemble after strong shock and is convenient to realize the quick repair of the main structure.)

1. The utility model provides a restraint attenuator is prevented falling by bridge which characterized in that: the energy-saving injector mainly comprises a fixing unit and an injector-like energy consumption unit; the fixing unit consists of an upper rotary fixing support (1), a lower rotary fixing support (2), an upper side limit steel cylinder (3), an upper connecting steel (4) and a lower connecting steel (5); the injector-like energy consumption unit consists of a fixed core rod (6), a piston (7), a piston jacket (8), an oil cavity (9), an oil pumping pipe (10), an oil cavity jacket (13), a piston cavity (14) and an exhaust hole (15).

2. The bridge fall arrest restraint damper of claim 1, wherein: the piston (7) moves towards the upper rotating fixed support (1) until colliding with the piston outer sleeve (8), and the bridge anti-falling restraint damper is locked to prevent the bridge anti-falling restraint damper from continuously extending; the piston (7) moves towards the lower rotating fixed support (2) until the piston outer sleeve (8) collides with the upper connecting steel (4), and the bridge anti-falling restraint damper is locked to prevent the bridge anti-falling restraint damper from continuously shortening.

3. The bridge fall arrest restraint damper of claim 1, wherein: the upper side of the oil cavity outer sleeve (13) is provided with an air hole (11) and an oil filling hole (12), and a gauze is arranged in the air hole (11).

4. The bridge fall arrest restraint damper of claim 1, wherein: the length of the upper side limit steel cylinder (3) is greater than the thickness of the piston (7) plus the length of the fixed core rod (6).

5. The bridge fall arrest restraint damper of claim 1, wherein: the upper side limit steel cylinder (3) is fixed with the upper connecting steel (4) through threaded connection; the fixed core rod (6) is fixed with the upper connecting steel (4) through threaded connection.

6. The bridge fall arrest restraint damper of claim 1, wherein: the oil pumping pipe (10) is kept a certain distance away from the bottom of the oil cavity (9), usually 1cm, 2cm and 3cm, and the bottom of the oil cavity (9) is fixed with the lower connecting steel (5) through threaded connection.

7. The bridge fall arrest restraint damper of claim 1, wherein: the volume of the piston cavity (14) is smaller than the volume of the oil cavity (9).

8. The bridge fall arrest restraint damper of claim 1, wherein: one side of the upper rotary fixed support (1) is fixed on the bridge body and is fixed on the bridge pier through the lower rotary fixed support (2).

9. The bridge fall arrest restraint damper of claim 1, wherein: the surface of the inner side of the upper side limit steel cylinder (3) is provided with a non-adhesive coating Teflon coating.

10. The bridge fall arrest restraint damper of claim 1, wherein: the upper part of the piston outer sleeve (8) is provided with an exhaust hole (15).

Technical Field

The invention relates to the field of structural shock absorption in civil engineering, in particular to a bridge anti-falling constraint damper.

Background

Earthquake is one of the main natural disasters threatening the safety of major engineering structures, so the structure shock absorption control becomes an effective measure for the civil engineering disaster prevention and reduction work.

With the development of economy in China and the increasing innovation of the neighborhood of each industry, the structure earthquake-proof and disaster-reduction technology is developed at a rapid pace, and the technology gradually develops from the traditional method of resisting external adverse load action and basic earthquake-isolation measures by simply depending on structural member damage to a passive energy-dissipation and shock-absorption technology and an active, semi-active and intelligent control technology. The structure can improve self anti side rigidity after arranging ordinary support, but under the macroseism effect, bridge structures can take place to destroy, and the pontic of self can take place to collapse and produce serious secondary disaster. Under this kind of background environment, a novel restraint attenuator that falls is prevented to bridge arises in due course, and it is under the earthquake action of bridge intolerable within range, and the structure can be locked and play the effect that prevents the bridge member and fall, has avoided the production of the secondary disaster that the aftershock leads to.

Over the last two and thirty years, structural protection systems have developed rapidly. Experts at home and abroad recognize that the damper is an essential part in structural seismic resistance. The design of the structure allows the use of dampers in seismic design codes. Therefore, various dampers are developed in the aspect of bridge seismic resistance.

Most of bridge dampers widely used at present only play a role in energy consumption of earthquake, but due to the limited earthquake resistance of bridges and the limited energy consumption of dampers, the dampers cannot play a good earthquake-resistant role under the condition that the strong earthquake causes the collapse of the bridges. When aftershocks occur repeatedly, the effect of reducing secondary disasters cannot be effectively achieved.

Disclosure of Invention

In order to solve the technical problems that the general bridge damping damper cannot effectively exert effects under the action of strong earthquake and reduce secondary disasters and the like, the invention provides the anti-falling restraint damper for the bridge, which is simple and convenient to install and low in cost during construction. The bridge anti-falling device can play a role in preventing the bridge from falling under the condition that the bridge bears the earthquake outside the range and can cause the bridge to collapse, thereby reducing the generation of secondary disasters.

The technical scheme adopted by the invention for solving the technical problems is as follows: a bridge anti-falling constraint damper mainly comprises a fixing unit and an injector-like energy consumption unit, wherein the fixing unit and the injector-like energy consumption unit are made of Q235, Q345 and other steel materials.

The fixed unit comprises upper portion rotation fixing support, lower part rotation fixing support, the spacing steel cylinder of upper portion side, upper portion connection steel and lower part connection steel. The upper rotating fixed support is connected with the bridge anti-falling restraint damper through upper connecting steel and is fixed on the bridge body; the lower rotary fixed support is connected with the bridge anti-falling restraint damper through lower connecting steel and is fixed on the bridge pier.

The injector-like energy consumption unit consists of a fixed core rod, a piston outer sleeve, an oil cavity, an oil pumping pipe, an oil cavity outer sleeve, a piston cavity and an exhaust hole. Wherein, fixed core bar one end is connected steel with upper portion and is passed through threaded connection and link to each other, and the component takes place to destroy the back and is convenient for change, and the other end links to each other with the piston for the convenience. The piston cavity is formed in the piston outer sleeve, and the piston is arranged in the piston cavity. The oil cavity is formed in the oil cavity outer sleeve. The piston outer sleeve is connected with the oil cavity outer sleeve, but a small hole is reserved at the connection position for arranging an oil pumping pipe. The oil pumping pipe is communicated with the piston cavity and the oil cavity.

The piston moves towards the upper part rotating fixed support, until the piston collides with the piston outer sleeve, the bridge anti-falling restraint damper is locked, the bridge is prevented from continuing to extend, the bridge body falls after the bridge collapses, the anti-falling effect is achieved, and secondary disasters are reduced. The piston moves towards the lower part rotating fixed support until the piston outer sleeve collides with the upper part connecting steel, the bridge anti-falling restraint damper is locked to prevent the bridge anti-falling restraint damper from continuing to shorten, the supporting effect is achieved, the bridge is prevented from falling off from the cover beam, the anti-falling effect is achieved, and secondary disasters are reduced.

The upper side of the oil cavity outer sleeve is provided with a vent hole, so that viscous liquid in the oil cavity can be pumped to enter the piston cavity. The gauze is arranged in the air holes, so that the air holes can be prevented from being blocked by dust or particles in the surrounding environment when air enters under long-term work. In order to prevent the viscous liquid in the oil chamber from leaking during transportation, an oil filling hole is provided on the upper side of the oil chamber jacket. The viscous liquid is not injected during the transportation process, and the viscous liquid is injected through the oil filling hole after the component is successfully installed.

The length of the upper side limit steel cylinder is greater than the thickness of the piston and the length of the fixed core rod, so that the falling prevention restraint damper for the bridge cannot be disassembled.

The upper side limit steel cylinder is connected with the upper connecting steel through threaded connection and is used for limiting the position of the anti-falling restraint damper of the bridge and ensuring that only linear reciprocating motion occurs when the two ends of the damper move relatively. One end of the fixed core rod is connected with the upper connecting steel through threads.

In order to ensure that the viscous liquid can smoothly pass through the oil pumping pipe, the tail end of the oil pumping pipe keeps a certain distance with the bottom of the oil cavity, and the distance is usually 1cm, 2cm and 3 cm. The bottom of the oil cavity is connected with the lower connecting steel through a thread. The volume of a piston cavity in the injector-like energy consumption unit is smaller than that of an oil cavity, so that the oil pumping pipe is still soaked in the viscous liquid when the piston is maximally displaced. The lower connecting steel is connected with the lower rotary fixed support and is connected with the pier through the lower rotary fixed support.

The surface of the inner side of the upper side limit steel cylinder is provided with a non-adhesive coating Teflon coating, so that the friction force generated by the contact of the piston outer sleeve and the upper side limit steel cylinder can be reduced.

The upper part of the piston outer sleeve is provided with an exhaust hole, which aims to suck or exhaust the gas in the piston cavity along with the movement.

The damper pumps viscous liquid in the oil cavity into the piston cavity through the oil pumping pipe under the action of atmospheric pressure or injects the viscous liquid in the piston cavity into the oil cavity through the oil pumping pipe by the movement of the piston outer sleeve, so that the effect of energy consumption is achieved.

Compared with the prior art, the invention has the advantages that: (1) a bridge anti-falling restraint damper adopts the principle of an injector, so that the device has good energy consumption and shock absorption capacity; (2) a bridge anti-falling restraint damper is connected with a bridge body through an upper rotatable fixed support; the lower rotary fixed support is connected with the pier, so that the construction is simple and convenient, and the construction period can be shortened; (3) the bridge anti-falling restraint damper has the functions of energy dissipation and shock absorption, and simultaneously has the anti-falling function, so that the generation of secondary disasters caused by earthquakes is reduced, and the economic loss caused by the earthquakes is reduced; (4) the bridge anti-falling restraint damper integrally adopts steel and pollution-free viscous liquid, and the upper side limit steel cylinder can be reused, so that energy and materials are saved. (5) The utility model provides a restraint attenuator is prevented falling with connecting steel and passing through threaded connection to the bridge, makes the component that falls that consumes energy can be timely change after destroying, protects the bridge main part again, and it is convenient to change the installation. Therefore, the shock-absorbing energy-consuming anti-falling device has the advantages of excellent performance, low price, relatively simple structure, convenience in maintenance and replacement and reduction of secondary disasters.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of a bridge fall arrest restraint damper;

FIG. 2 is a schematic front view of a bridge fall arrest restraint damper;

FIG. 3 is a schematic diagram of an upper middle limiting steel plate of the bridge anti-falling restraint damper;

FIG. 4 is a top view of a piston jacket in the bridge anti-falling restraint damper;

FIG. 5 is a top view of an oil cavity outer sleeve in the bridge anti-falling restraint damper;

FIG. 6 is a schematic diagram of a piston in the bridge fall arrest restraint damper;

FIG. 7 is a schematic view of a side limiting steel cylinder at the middle upper part of the bridge anti-falling restraint damper;

wherein: 1. the oil pumping device comprises an upper rotary fixed support, a lower rotary fixed support, a 3 upper side limit steel cylinder, a 4 upper connecting steel, a 5 lower connecting steel, a 6 fixed core rod, a 7 piston, a 8 piston outer sleeve, a 9 oil cavity, a 10 oil pumping pipe, a 11 air hole, a 12 oil injection hole, a 13 oil cavity outer sleeve, a 14 piston cavity, a 15 exhaust hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.

As shown in figures 1-2, a bridge anti-falling restraint damper mainly comprises an anti-falling unit and an injector-like energy consumption unit

And (4) obtaining. The fixing unit comprises an upper rotary fixing support 1, a lower rotary fixing support 2, an upper side limit steel cylinder 3, an upper connecting steel 4 and a lower connecting steel 5; the energy consumption unit of the similar injector is formed by welding a piston outer sleeve 8 and an oil cavity outer sleeve 13, a piston 7 and a fixed core rod 6 are arranged in the piston outer sleeve 8, and the fixed core rod 6 is connected with an upper connecting steel 4 through threads; the piston outer sleeve 8 is arranged in the upper side limit steel cylinder 3, so that the two ends of the damper only do linear reciprocating motion when moving relatively, and the damper cannot be disassembled. Aiming at the problem that various bridge dampers in the prior art cannot reduce the generation of secondary disasters during earthquakes, the invention provides a bridge anti-falling constraint damper which is manufactured by the following steps:

(1) one end of the fixed core rod 6 is stranded, the other end of the fixed core rod is welded with the piston 7, and the fixed core rod and the piston are plugged into the piston outer sleeve 8;

(2) the inner side surface of the upper side limit steel cylinder 3 is subjected to Teflon coating treatment;

(3) the upper part is connected with the twisted wire on the outer surface of the steel 4 and is screwed into one end of the twisted wire on the inner surface of the upper side limit steel cylinder 3 for connection;

(4) the piston outer sleeve 8 is plugged into the inner side of the upper side limit steel cylinder 3, and the twisted wire end of the fixed core rod 6 is screwed into an inner wire hole reserved in the upper connecting steel 4 for connection;

(5) the oil pumping pipe 10 is placed in the oil cavity outer sleeve 13 and welded together;

(6) the other end of the piston outer sleeve 8 is welded with one end of the oil cavity outer sleeve 13 with the oil pumping pipe 10, and the end with the oil filling hole is placed upwards;

(7) the lower part is connected with the twisted wire on the outer surface of the steel 5 and is screwed into one end of the twisted wire on the inner surface of the oil cavity outer sleeve 13 for connection;

(8) the other end of the upper connecting steel 4 is welded with the upper rotating and fixing support 1, and the other end of the lower connecting steel 5 is welded with the lower rotating and fixing support 2.

When the bridge anti-falling restraint damper works, the piston outer sleeve 8 can reciprocate in the upper side limiting steel cylinder 3, so that the bridge anti-falling restraint damper is ensured to move along the horizontal direction, and instability damage is prevented; the piston outer sleeve 8 is restrained by the upper connecting steel 4 and the piston 7, so that the bridge anti-falling restraint damper can limit the displacement of the bridge structure and reduce the generation of secondary disasters; when the piston outer sleeve 8 reciprocates, the piston 7 can pump the viscous liquid in the oil cavity 9 into the piston cavity through the oil pumping pipe under the action of atmospheric pressure or inject the viscous liquid in the piston cavity into the oil cavity 9 through the oil pumping pipe, so that the energy consumption effect is achieved, and the anti-seismic and anti-drag effects are achieved.

Those skilled in the art will readily appreciate that the above description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the present invention, and that all other embodiments obtained by those skilled in the art without the use of inventive faculty are within the scope of the present invention.