CN205839580U - Uniformly displacement drag-line modulus expansion joint - Google Patents

Abstract

The displacement control systems such as this utility model relates to a kind of uniformly displacement drag-line modulus expansion joint, the displacement control system such as including support system, longeron and hinge type, hinge type are connected with modulus expansion joint by the slippage slot bottom longeron, it is achieved displacement regulation and control.Wherein support system is by crossbeam, compressing support, bearing and carriage composition, and compressing support and bearing are made by politef slide plate, are individually positioned in the upper and lower surface of crossbeam, and consolidate with carriage.The chain bar that the displacement control systems such as hinge type are isometric has the rotational slip pin of chain boom end and the rotational pin in chain bar centre position to be formed by connecting respectively.For reducing the impact of frictional resistance further, crossbeam two ends are sliding end, and are the beam that falls preventing crossbeam, are connected as a single entity with controlling casing by crossbeam with elastomeric cords.This utility model is meeting on the premise of stretching between normal service condition underbeam be, it is achieved that uniformly stitch wide purpose between the longeron of modulus expansion joint.Additionally, have great importance for girder falling, collision under geological process.

Description

Uniform displacement cable modulus expansion joint

technical field

The utility model belongs to the technical field of bridge engineering, in particular to an expansion joint with a uniform displacement cable modulus.

Background technique

With the progress of modernization, the construction of long-span bridges and long-connected multi-span bridges is increasing. Modular expansion joints, as an expansion joint device with simple structure, long service life and convenient installation, are increasingly used in large-span and long-connected multi-span bridges to adapt to large shrinkage deformation between joints under normal use .

Modular expansion joints divide the total displacement into multiple displacement units, and the upper waterproof rubber prevents water from flowing into the expansion joints, effectively preventing corrosion of the bridge superstructure. In addition, the modular expansion joints have derived different load-bearing systems such as multi-beam type and single-beam type, and the single-beam type load-bearing system is divided into grid type and rotary type, etc. , to ensure the stability and comfort of the vehicle when passing.

Inventor Yuan Wancheng changed the traditional modular expansion joint beam to slide at both ends, and connected the supporting beam and the control box with the through cable, and proposed the cable modular expansion joint device. The cable modulus expansion joint can effectively prevent the collision and falling of the beam caused by the excessive displacement of the beam end under the action of the earthquake. In this way, the expansion joint is changed from a structural facility to adapt to the expansion and deformation between the beams to a kind of anti-collision and beam falling. anti-seismic device. However, the cable modulus expansion joint still has the phenomenon of uneven gap width between stringers, which is specifically manifested as: when the temperature rises and the expansion joint compresses, the gap width near the fixed end is greater than the gap width between the stringers far from the fixed end ; On the contrary, when the temperature decreases and the expansion joint stretches, the gap width near the fixed end is smaller than that between the longitudinal beams far away from the fixed end. And the research and analysis found that the uneven width of the expansion joint not only seriously affects the driving comfort, but also affects the impact characteristics, fatigue characteristics and vibration characteristics of the expansion joint, and may further increase the noise generated during the driving process.

Therefore, it is necessary to explore the phenomenon of uneven gap width between longitudinal beams of expansion joints in order to propose a reasonable and effective method to make the displacement of the longitudinal beams uniform, and finally realize the uniform gap width between the longitudinal beams of the modulus expansion joints.

Contents of the invention

In order to solve the problem of uneven seam width of the modulus expansion joint, the purpose of the utility model is to provide a uniform displacement cable modulus expansion joint with a simple structure.

In the utility model, the uniform displacement cable modulus expansion joint is characterized in that the expansion joint includes a support system, a middle longitudinal beam 4, a side longitudinal beam 9, a hinged displacement control system and a drag cable 11; the support The system consists of a beam 7, a compression support 6, a pressure support 5 and a support frame 8, the compression support 6 and the pressure support 5 are made of polytetrafluoroethylene plates, and the beam 7 passes through the support frame 8 , its upper surface is fixedly connected to the support frame 8 through the compression support 6, and its lower surface is fixedly connected to the support frame 8 through the pressure bearing 5; connection; the hinged displacement control system is composed of equal-length chain rods 1, rotating sliding pins 2 and rotating pins 3, and equal-length chain rods 1 are connected by rotating sliding pins 2 to form a group of equal-length chain rod groups. The equal-length chain rod group is connected by the rotating pin 3 located in the middle of the equal-length chain rod 1 to form a hinge structure, so that each equal-length chain rod 1 can rotate reliably. The bottom of the middle longitudinal beam 4 is provided with a longitudinal sliding groove 12, so The rotating sliding pin 2 of the hinged displacement control system is connected to the middle longitudinal beam 4 through the longitudinal sliding groove 12 at the bottom of the middle longitudinal beam; the control box 10 is arranged on both sides of the cross beam 7, and the cross beam 7 and the control box 10 pass through the cable 11 connected.

In the present utility model, the number of the longitudinal beams 4 depends on specific conditions.

In the present utility model, side beams 9 are arranged on both sides of the middle longitudinal beam 4, and the side beams 9 and the cross beams 7 are vertically arranged, and both ends of the side beams 9 are fixed on the main beam.

The hinged displacement adjustment system described in the utility model is formed by connecting chain rods with the same length through the rotating pin at the middle position of the chain rod and the rotating and sliding pin at the end. The hinged displacement adjustment system realizes the combination of the displacement control system and the support system by embedding the rotating sliding pin at the end into the longitudinal sliding groove at the bottom of the longitudinal beam. When the expansion joint expands and deforms, the rotating sliding pins at both ends of the chain rod of the displacement adjustment system slide along the slots on the longitudinal beams, and the lateral distance between adjacent rotating sliding pins decreases, driving the lateral equal displacement of each longitudinal beam Movement, the shrinkage displacement of the expansion joint due to the temperature change of the main beam is reliably and evenly transmitted to each longitudinal beam through mechanical adjustment, and finally the uniformity of the joint width is achieved.

The beam of the traditional modular expansion joint is fixed at one end and slides at the other end. During the expansion process of the expansion joint, the force is transmitted from the movable end to the fixed end. The magnitude of the force is different, and the displacement of each longitudinal beam of the final modulus expansion joint is different, resulting in uneven gap width between longitudinal beams. The advantage of the technical solution provided by the invention:

The uniform displacement cable modulus expansion joint provided by the utility model reduces the influence of frictional resistance, and the compression support and pressure bearing support of the vertical and horizontal beams are made of polytetrafluoroethylene slide plates, so that the friction between the vertical and horizontal beams Significantly lower drag.

In order to further reduce the influence of frictional resistance between the longitudinal and horizontal beams and realize the uniformity of the gap width between the longitudinal beams, the utility model changes the original fixed end and sliding end to sliding at both ends, shortens the transmission path of force, and reduces the superposition of frictional resistance Combined influence, reduce the frictional resistance effect between longitudinal and horizontal beams in the process of force transmission, and reduce the difference in force of each longitudinal beam.

In addition, the utility model provides a support system and a displacement control system independent of each other, so that the shrinkage displacement of the expansion joint can be transmitted to each longitudinal beam evenly and effectively, and finally the uniform width of the joint can be realized.

In order to avoid that the relative displacement between the beam and the control box is too large to cause the beam to fall, the utility model arranges a through cable between the beam and the control box to connect the two together to avoid the beam from falling. In addition, by setting a certain free path for the cable, the cable can prevent collisions caused by excessive displacement without affecting the normal use of the expansion joint.

The hinged displacement adjustment system in the utility model changes the traditional elastic displacement control system relying on shear springs and compression springs into a mechanical displacement control system, which reduces the influence of frictional resistance, is beneficial to the uniform displacement of each longitudinal beam, and realizes longitudinal displacement. Uniformity of gap width between beams.

In a word, the utility model is a large-displacement uniform displacement cable modulus expansion joint, which is intended to solve the phenomenon of uneven gap width between longitudinal beams of the modulus expansion joint.

Description of drawings

Figure 1 is a hinged displacement adjustment system;

Fig. 2 is a three-dimensional view of a uniform displacement cable modulus expansion joint;

Fig. 3 is the plane view of the expansion joint of the modulus of the uniform displacement cable;

Figure 4 is the connection structure between the hinged displacement adjustment system and the longitudinal beam;

Fig. 5 is support system connection structure;

Fig. 6 is a rotating pin structure;

Fig. 7 is the structure of rotating sliding pin;

Figure 8 shows the seam width adjustment mechanism of the hinged displacement adjustment system. ,in:

where d 1 is the displacement between the longitudinal girders before expansion of the expansion joint, 2 l is the length of the equal-length chain rod, a is the angle (acute angle) between the equal-length chain rod before the expansion joint and the longitudinal bridge direction of the bridge, and a + b is The angle (acute angle) between the equal-length chain rod and the longitudinal direction of the bridge after the expansion joint expands. △ d is the change value of the gap width between each longitudinal beam of the expansion joint.

Numbers in the figure: 1 is a chain rod, 2 is a rotating sliding pin, 3 is a rotating pin, 4 is a middle longitudinal beam, 5 is a pressure bearing, 6 is a compression support, 7 is a beam, 8 is a support frame, 9 is a side beam, 10 is a control box, 11 is a drag cable, and 12 is a longitudinal sliding groove.

detailed description

In order to enable the examiners of the patent office, especially the public, to understand the technical essence and beneficial effects of the utility model more clearly, the applicant will describe in detail below in the form of embodiments with reference to the accompanying drawings. However, the description of the embodiments is not a limitation of the utility model, and any equivalent transformation made according to the concept of the utility model, which is only in form but not in substance, should be regarded as the scope of the technical solution of the utility model.

Example 1

The uniform displacement cable modulus expansion joint includes a support system, a middle longitudinal beam 4, a hinged displacement control system and a cable 11. Wherein the support system is composed of beam 7 , compression support 6 , pressure bearing 5 and support frame 8 . The compression support 6 and the pressure support 5 are made of polytetrafluoroethylene slide plates, which are respectively placed on the upper and lower surfaces of the beam 7, and the compression support 6 and the pressure support 5 are fixed to the support frame 8 respectively. The connection method is shown in Figure 5; the middle longitudinal beam 4, the side beam 9 and the cross beam 7 are perpendicular to each other, and the support system and the middle longitudinal beam 4 are consolidated with pins, and the side beam 9 is anchored on the main beam.

The uniform displacement cable modulus expansion joint displacement control system is formed by connecting a chain rod 1 of equal length through a rotating pin 3 at the middle position of the chain rod and a rotating sliding pin 2 at the end of the chain rod, as shown in Figure 1. And it is necessary to ensure that the chain rod can move reliably.

The hinged displacement control system realizes the combination of the displacement control system and the support system by installing the rotating sliding pin 2 into the longitudinal sliding groove 12 at the bottom of the longitudinal beam. The pin 2 slides along the longitudinal sliding groove 12 on the middle stringer 4, and the lateral distance between the adjacent rotating and sliding pins 2 decreases, which drives the horizontal displacement movement of the middle stringer 4 and the side beam 9, and finally realizes the gap width. Uniformity.

The stay cable 11 is connected between the beam 7 and the control box 10, and runs through the two ends of the stay cable 11 and is respectively anchored on the control box 10, so as to avoid the excessive relative displacement between the beam and the control box 10 and cause the middle longitudinal beam 4 to fall. And by setting a reasonable free path of the cable to prevent the pressure damage between the middle longitudinal beam 4 and the side beam 9 .

One of the technical points of the technical solution of the utility model is to reduce the frictional resistance between the longitudinal and horizontal beams. In order to reduce the influence of friction resistance, the compression support 6 and the pressure support 5 are made of polytetrafluoroethylene, so that the friction resistance between the longitudinal beam 4 and the cross beam 7 will be significantly reduced. In addition, the vertical joint of the expansion joint The lateral stiffness has also been improved.

The second technical point of the technical solution of the utility model is to shorten the transmission path of the force. The beam of the traditional modular expansion joint is fixed at one end and slides at the other end. When the expansion joint deforms, the movement is transferred from the movable end to the fixed end. The effect of the frictional resistance between the beams makes the forces transmitted to the longitudinal beams unequal, which eventually leads to uneven displacement of the longitudinal beams. Therefore, the utility model first releases the constraints of the fixed ends of the beams 7 and becomes a structural form in which both ends slide In this way, the force transmission path is shortened during the force transmission process, which improves the force uniformity between the middle longitudinal beams 4 and the side beams 9 to a certain extent.

Three of the technical essentials of the technical solution of the utility model are limited by the stay cable 11. Both ends of the crossbeam 7 are in a sliding state. In order to avoid excessive displacement of 10 between the crossbeam 7 and the control box and cause beam drop and collision, the utility model connects the supporting beam and the control box with a through cable 11. together, as shown in Figure 2. By adjusting the free path of the cable 11, the relative displacement between the beams can be effectively controlled without affecting the normal operation of the expansion joint, so as to prevent falling beams and collisions.

The fourth technical point of the technical solution of the utility model is a hinged equal displacement control system. To realize the displacement adjustment function of the hinged equal displacement control system, it is first necessary to ensure that the lengths of the rods between the rotating pin 3 and the rotating sliding pin 2 are equal, and secondly, to realize the reliable connection of the equal displacement control system. Moreover, the uniform displacement cable modulus expansion joint realizes the force separation between the support system and the displacement control system, and can be manufactured in a modular manner.

As a transformation of the embodiment of the utility model, the length of the hinged displacement control system can be increased according to the number of modulus expansion joint stringers.

As a variation of the embodiment of the present invention, the material of the chain rod can be replaced according to the force requirements of the hinged displacement control system, and a suitable size can be selected to meet the ideal rigidity requirement.

Claims (2)

1. uniformly conjugate drag-line modulus expansion joint, it is characterised in that described expansion joint includes support system, middle longeron (4), Bian Zong Beam (9), hinge type displacement control system and drag-line (11)；Described support system is by crossbeam (7), compressing support (6), bearing (5) forming with carriage (8), compressing support (6) and bearing (5) are made by polyfluortetraethylene plate, and crossbeam (7) is through propping up Support frame (8), its upper surface is connected by compressing support 6 and carriage (8) are fixing, and its lower surface is by bearing (5) and props up The fixing connection of support frame (8)；Middle longeron (4) is arranged vertically with support system, and middle longeron is fixing with crossbeam (7) to be connected；Described hinge Chain type displacement control system is made up of long-chain bar such as grade (1), rotational slip pin (2) and rotational pin (3), several long-chain bar such as grades (1) It is in turn connected to form the long-chain bar group such as a group by rotational slip pin 2, corresponding in the long-chain bar groups such as two groups each waits long-chain Bar (1) middle part is connected by rotational pin (3), constitutes hinge type structure, makes each long-chain chain bar (1) Positive rotational of Denging, described in indulge Beam (4) bottom is provided with straight skidding groove (12), and the rotational slip pin (2) of described hinge type displacement control system is by the bottom of middle longeron The straight skidding groove (12) in portion is installed on middle longeron (4)；Crossbeam (7) both sides are provided with control chamber (10), and crossbeam (7) passes through drag-line (11) control chamber (10) is connected.

Uniform displacement drag-line modulus expansion joint the most according to claim 1, it is characterised in that the two of described middle longeron (4) Side arranges side bar (9), and side bar (9) is arranged vertically with crossbeam (7), and side bar (9) two ends are fixed on girder.