An assembly-combined replaceable modular telescopic device and its preparation process

Abstract

The invention belongs to the technical field of bridge expansion devices, and discloses an assembly combination modular expansion device which is convenient to replace and a preparation and maintenance process thereof. The device includes a side beam assembly combination profiled steel and a middle beam assembly combination profiled steel, the bottom of a side beam is provided with a displacementcontrol box with a cross beam, the side beam and a middle beam and an adjacent middle beam are connected by a displacement transmission device, and a waterproof rubber strip is arranged; the displacement transmission device comprises a polyurethane spring and spring tension adjusters, the spring tension adjusters are disposed at the bottoms of each middle beam, the adjusters are provided with screw rods penetrating through the middle beams, the bottoms of the screw rods are provided with two upper and lower separated nuts, the left portions and the right portions of the two nuts are respectively connected by linking rods, one end of the polyurethane spring is hinged to the side beam, and the other end is in bolt connection with the spring tension adjusters. The expansion device can solve the degradation of the tension caused by the long-term use of a spring, and the expansion and deformation of the device are kept uniform at all times. The device can fully assemble all components, provide convenience for replacing partially damaged components and reduce maintenance costs.

Description

technical field [0001] The invention belongs to the technical field of bridge expansion devices, and in particular relates to an assembly-combined modulus type expansion device that is easy to replace and its preparation and maintenance process. Background technique [0002] The telescopic device is an important accessory facility of the bridge, and its good working performance is crucial to the reliability and safety of the bridge under the external environment and load. However, due to deficiencies in design and installation, many telescopic devices have poor durability and short service life, which puts higher requirements on the design of telescopic devices. On the other hand, the replacement of bridge expansion devices often requires interruption of traffic. If the damaged expansion devices can be quickly repaired and replaced, the impact on traffic will be minimized. At present, there are many types of telescopic devices, among which the modular type telescopic device...

AI Technical Summary

Problems solved by technology

The failure characteristics of existing modular expansion devices mainly focus on the following aspects: First, the middle beam and the supporting beam are usually integrally welded, and the joint is easily damaged under the frequent impact of vehicle loads

Secondly, the transmission device that controls the expansion and contraction deformation is usually composed of polyurethane springs, and the springs are prone to stress relaxation under the action of long-term tension, resulting in inconsistent expansion and contraction deformation of each center sill, increasing the risk of local damage to the center sill

Finally, the waterproof rubber strip of the modular expansion device is generally a single-layer design, and the waterproof performance cannot be guaranteed once it is damaged

In addition, the current telescopic device is usually designed as an integrated type, and the damage of a part of the device requires the replacement of the whole, which is time-consuming and laborious

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