CN214783246U - Hidden type comb-tooth-shaped expansion joint device - Google Patents

Abstract

The utility model belongs to the technical field of the expansion joint, specific saying relates to a hidden broach type expansion joint device. The expansion joint comprises an expansion joint body consisting of a fixed comb plate and a movable comb plate, wherein shaft boxes are respectively arranged at two ends of the expansion joint body, a water stop is connected between the shaft boxes, two sides of the water stop are wound on a rotating shaft in the shaft boxes, and the rotating shaft rotates to realize that the water stop is wound and unwound and consistent with the movement of the expansion joint. The expansion joint device with the novel structure can effectively hide the expansion region of the comb teeth, relieve the load impact of the bridge deck to protect the bridge connection structure, and realize the purpose that the expansion joint device of the comb-tooth type bridge is firm in connection and free in expansion.

Description

Hidden type comb-tooth-shaped expansion joint device

Technical Field

The utility model belongs to the technical field of the expansion joint, specific saying relates to a hidden broach type expansion joint device.

Background

In order to meet the requirement of bridge deck deformation, expansion joints are usually arranged between two beam ends, between the beam ends and a bridge abutment or at the hinged position of a bridge, and the expansion joints can freely expand and contract in two directions parallel to and perpendicular to the axis of the bridge, so that the bridge deck is firm and reliable. The comb plate type expansion joint is a common type, and the existing comb plate type expansion joint device comprises a fixed toothed plate and a movable toothed plate which are connected in a socket joint mode.

The comb-tooth type expansion joint device has the common problems that when the movable toothed plate stretches and retracts in a reciprocating mode, the comb-tooth part is easy to deform, namely the end part of the movable toothed plate is inserted into a tooth seam of the fixed toothed plate, and the local part of the movable toothed plate is in a suspended state, so that the movable toothed plate is easy to bend and deform downwards; secondly, the comb tooth structure covers the expansion joint area, directly receives load impact of the vehicle bridge deck, and forms fatigue damage to bridge concrete at the lower part of the expansion joint structure, so that the expansion joint structure is damaged, and connecting bolts are easy to loosen to form potential safety hazards; thirdly, inside for preventing rainwater and rubbish earth infiltration blocking expansion joint, generally install the waterstop in the below of fishback, but fishback upper portion is in the exposure position, and rainwater, earth etc. still can invade broach socket joint position, seriously influence the elasticity performance, and it is comparatively serious to corrode the fishback simultaneously, and life is showing and is shortening.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can effectively hide the flexible region of broach, alleviate bridge floor load impact protection bridge connection structure's expansion joint device, have connect characteristics such as firm, flexible freely.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides a hidden broach type expansion joint device, includes the expansion joint body that constitutes by fixed fishback, activity fishback, its characterized in that: the expansion joint comprises an expansion joint body and is characterized in that shaft boxes are arranged at two ends of the expansion joint body respectively, a water stop is connected between the shaft boxes, two sides of the water stop are wound on a rotating shaft in the shaft boxes, and the rotating shaft rotates to realize that the water stop is retracted and extended consistent with the movement of the expansion joint.

The additional technical characteristics of the hidden comb-tooth expansion joint device also comprise:

a coiler is arranged on the rotating shaft and comprises a plurality of coil springs sleeved on the rotating shaft, one end of each coil spring is fixed with the rotating shaft, and the other end of each coil spring is fixed in the shaft box;

-the retractor has a damping mechanism comprising a concentric shaft moving synchronously with the rotating shaft, there being a closed circumferential cavity between the rotating shaft and the concentric shaft for filling with hydraulic oil or non-newtonian fluid; the concentric shaft is provided with radial fan blades for dividing the annular cavity into two chambers, and the fan blades are provided with runners for communicating the two chambers;

the water stop comprises a rubber base body and a reinforcing layer formed by fiber wires or steel wires arranged in the rubber base body;

the shaft boxes are respectively fixed at the outer side ends of the fixed comb plate and the movable comb plate, the upper part of the inner side of the shaft box is provided with a notch for the water stop to move in a telescopic mode, and the water stop covers the fixed comb plate and the movable comb plate and is flush with the upper surface of the shaft box;

the bottom of the fixed comb plate and the bottom of the movable comb plate are connected with the bridge expansion joint through the anchoring assembly.

The utility model provides a hidden broach type expansion joint device compares with prior art, has following advantage: because the two ends of the expansion joint body of the hidden comb-tooth-shaped expansion joint device are respectively provided with the shaft boxes, the water stop belt is connected between the shaft boxes, and the two sides of the water stop belt are wound on the rotating shaft in the shaft boxes, namely, the water stop belt can be folded and unfolded, the width of the water stop belt can be freely changed, when the rotating shaft rotates, the water stop belt realizes the consistency of the width of the water stop belt and the movement of the expansion joint, the water belt always hides and covers the whole comb plate in the working process of the expansion joint device, the protection of the comb plate is enhanced, especially, the comb-tooth socket area is cleaner, the rainwater and sundries are prevented from being invaded and deposited, and the comb teeth can be ensured to be freely stretched and retracted; the water stop comprises a rubber base body and a reinforcing layer formed by fiber wires or steel wires arranged in the rubber base body, so that the structural strength of the water stop is improved, the water stop is convenient to wind and release, effective buffering can be provided for bridge deck load impact, the damage to a bridge concrete structure caused by rigid impact of the comb plate is prevented, and the fatigue damage of the expansion joint to the bridge in the working process is remarkably reduced; thirdly, because the coiler of pivot has damping mechanism, receive and release to the waterstop and have stabilizing action, for example, when meetting the vehicle and accelerating or brake, the waterstop provides powerful friction, prevents that the vehicle from skidding or brake failure, improves the current security of vehicle, in addition, also has damping action to the broach is flexible, prevents excessively flexible, and the unsettled part of activity fishback is too big, causes the deformation of collapsing, takes place to jump the car or produce the noise scheduling problem when avoiding the vehicle to pass through.

Drawings

Fig. 1 is a schematic structural view of a hidden comb-tooth type expansion joint device of the present invention;

fig. 2 is a schematic cross-sectional view of a part of the rotating shaft of the hidden comb-shaped expansion joint device.

Detailed Description

The structure and the working principle of the hidden comb-tooth type expansion joint device provided by the present invention will be further described in detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, the hidden comb-shaped expansion joint device according to the present invention is shown in the drawings. The hidden comb-tooth-shaped expansion joint device comprises an expansion joint body consisting of a fixed comb-tooth plate 1 and a movable comb-tooth plate 2, wherein shaft boxes 3 are respectively arranged at two ends of the expansion joint body, a water stop 4 is connected between the shaft boxes 3, two sides of the water stop 4 are wound on a rotating shaft 31 in the shaft boxes 3, and the rotating shaft 31 rotates to realize that the water stop 4 is folded and unfolded to be consistent with the motion of an expansion joint a.

The working principle is as follows: this expansion joint device's fixed fishback 1 and activity fishback 2 take one's place the back in expansion joint a both sides installation, axle box 3 is fixed respectively at its both ends, be the fixed headspace of axle box 3 in the embedded groove of bridge expansion joint a both sides promptly, set up pivot 31 in the axle box 3, can convolute the side of receiving and releasing waterstop 4, connect through waterstop 4 that can alternate the width between the axle box 3 at both ends promptly, hide the cover with fishback is whole, pivot 31 rotates, the width change of waterstop 4 is unanimous with broach concertina movement, the protection to the fishback has been increaseed, the waterproof ability of expansion joint device is better.

In the structure of the above-mentioned hidden comb-tooth type expansion joint device,

preferably, the rotating shaft 31 is provided with a retractor, the retractor comprises a plurality of coil springs 32 sleeved on the rotating shaft 31, one end b1 of each coil spring 32 is fixed with the rotating shaft 31, and the other end b2 of each coil spring is fixed in the shaft box 3, generally, as the water stop belt 4 has a certain thickness and has high toughness strength, when the expansion joint contracts, the rotating shaft 31 can be pushed to move, so that winding without redundancy is realized, and the water stop belt is automatically retracted into the shaft box 3, after the retractor is arranged on the rotating shaft 31, when the expansion joint a is unfolded, the rotating shaft 31 moves to realize unwinding of the water stop belt 4, the coil springs 32 are in a tensed state, when the expansion joint a retracts, the coil springs 32 automatically pull the rotating shaft 31 to rotate, so that the water stop belt 4 is wound, and accumulation phenomenon caused by untimely recovery of the water stop belt 4 in the long-time use process or when the expansion joint a is rapidly expanded;

furthermore, the retractor has a damping mechanism, the damping mechanism includes a concentric shaft 33 moving synchronously with the rotating shaft 31, a closed annular cavity is provided between the rotating shaft 31 and the concentric shaft 33 for filling hydraulic oil c or non-newtonian fluid, a radial vane 34 is provided on the concentric shaft 33 for dividing the annular cavity into two chambers, the vane 34 is provided with a microporous flow passage 35 communicating the two chambers, i.e. the concentric shaft 33 inside the rotating shaft 31 rotates synchronously during the rotation process, the vane 34 located in the radial direction of the concentric shaft 33 stirs the hydraulic oil c or non-newtonian fluid filled in the annular cavity between the rotating shaft 31 and the concentric shaft 33, thereby generating a damping effect, since the vane 34 is provided with the microporous flow passage 35 to communicate the chambers located at both sides of the vane 34, the final movement of the rotating shaft 31 is not hindered, only the movement amplitude is slowed down, and the violent movement is prevented, the buffer has good buffer effect on bridge deck load impact, prevents the problems of fatigue damage of a bridge structure, loose concrete at an installation part, loose connecting bolts and the like, and obviously prolongs the service life of a bridge expansion joint;

optionally, the water stop 4 includes a rubber base and a reinforcing layer made of fiber or steel wires disposed inside the rubber base, that is, the water stop 4 has both strength and flexibility, and is made of a rubber composite material, specifically, a composite material with cords (polyester, nylon, rayon, steel wires, etc.) as a reinforcing phase and rubber as a base. The composite material has the characteristics of common composite materials, and also has the characteristics of viscoelasticity, large deformation, high modulus ratio (which can be up to 3-4 orders of magnitude), and the like;

in one embodiment, the shaft boxes 3 are respectively fixed at the outer ends of the fixed comb plate 1 and the movable comb plate 2, that is, the water stop belts 4 between the shaft boxes 3 can completely cover the fixed comb plate 1 and the movable comb plate 2, the upper part of the inner side of the shaft box 3 is provided with a notch 36 for the water stop belts 4 to move in a telescopic manner, the water stop belts 4 cover the fixed comb plate 1 and the movable comb plate 2 and are flush with the upper surface of the shaft box 3, the flatness of a bridge expansion joint area is improved, no jumping and noise occur when a vehicle passes through the expansion joint, seamless connection is realized, and meanwhile, compared with the case that the water stop belts 4 are arranged below the comb plates, the waterproof performance is better;

furthermore, the bottom of the fixed comb plate 1 and the bottom of the movable comb plate 2 are connected with the bridge expansion joint through anchor components, each anchor component comprises a fastening bolt 51 or a steel bar, a door-shaped steel bar 52 embedded in a concrete structure, a longitudinal steel bar 53 and the like, the composite three-dimensional connecting structure increases the stability of the expansion joint structure, and certainly, the anchor components can be arranged at the bottom of the shaft box 3 to strengthen the connecting strength, the structure is convenient for carrying out technical improvement on the existing comb-tooth-shaped expansion joint device, only the shaft boxes 3 are additionally arranged on two sides of the existing expansion joint structure, and the bridge expansion joint structure is simple and convenient to produce, manufacture, install and use, has outstanding economic benefits and has great popularization value.

Claims (6)

1. The utility model provides a hidden broach type expansion joint device, includes the expansion joint body that constitutes by fixed fishback, activity fishback, its characterized in that: the expansion joint comprises an expansion joint body and is characterized in that shaft boxes are arranged at two ends of the expansion joint body respectively, a water stop is connected between the shaft boxes, two sides of the water stop are wound on a rotating shaft in the shaft boxes, and the rotating shaft rotates to realize that the water stop is retracted and extended consistent with the movement of the expansion joint.

2. The hidden comb-tooth type expansion joint device as claimed in claim 1, wherein: the rotating shaft is provided with a retractor, the retractor comprises a plurality of coil springs sleeved on the rotating shaft, one end of each coil spring is fixed with the rotating shaft, and the other end of each coil spring is fixed in the shaft box.

3. The hidden comb-tooth type expansion joint device as claimed in claim 2, wherein: the retractor is provided with a damping mechanism, the damping mechanism comprises a concentric shaft which moves synchronously with the rotating shaft, and a closed annular cavity is formed between the rotating shaft and the concentric shaft and is used for filling hydraulic oil or non-Newtonian fluid; the coaxial shaft is provided with radial fan blades for dividing the annular cavity into two chambers, and the fan blades are provided with runners for communicating the two chambers.

4. The hidden comb-tooth type expansion joint device as claimed in claim 1, wherein: the water stop comprises a rubber base body and a reinforcing layer formed by fiber yarns or steel wires arranged in the rubber base body.

5. The hidden comb-tooth type expansion joint device as claimed in claim 1, wherein: the axle box is fixed respectively the outside end of fixed fishback, activity fishback, axle box inboard upper portion has the notch that supplies waterstop concertina movement, the waterstop covers fixed fishback, activity fishback, and with the upper surface of axle box flushes.

6. The hidden comb-tooth type expansion joint device as claimed in claim 1, wherein: the bottom of the fixed comb plate and the bottom of the movable comb plate are connected with the bridge expansion joint through the anchoring assembly.

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