Sealing structure and sealing method for lifting cord hole of metro vehicle

Abstract

The invention discloses a sealing structure and sealing method for a lifting cord hole of a metro vehicle. The sealing structure comprises a lifting cord clamping block arranged inside the lifting cord hole, the lifting cord hole is an oblong hole, and the diameter of the lifting cord hole is approximately 60 mm; the lifting cord clamping block comprises two semicircular dies, multiple multipath dies, multiple partition plates and a wedge-shaped fastening block; the two semicircular dies are matched with two semicircular holes of the lifting cord hole respectively; a rectangular hole of the lifting cord hole is filled with the multipath dies, the partition plates and the wedge-shaped fastening block in a close arrangement mode; each multipath die is provided with a multipath through hole, a cord body can pass through each multipath through hole, and therefore the sealing effect is achieved; an expansion bolt is arranged inside the wedge-shaped fastening block. By adopting the structure and method, the required pieces and components are small in number and the cost is low; no lifting cord clamping block installing lining is needed, the installation process is simple, the production period is short, and the service life is long.

Description

technical field [0001] The invention relates to a sealing structure and a sealing method for a subway vehicle, in particular to a sealing structure and a sealing method for a lead wire hole of a subway vehicle. Background technique [0002] With the rapid development of railway technology and the continuous improvement of passengers' requirements for vehicle comfort, the sealing performance of vehicles has become an important technical index to measure the quality of subway vehicles. [0003] The sealing design of the lead wire hole not only has requirements on the sealing level, if waterproof and dustproof effects need to be considered, but also the anti-pyrotechnic performance of the material and the sound insulation and noise reduction effect of the material itself. [0004] At present, the sealing structure of the lead wire hole of the existing subway vehicle, such as image 3 As shown, it mainly includes the clamp block, lead wire clamp block installation bushing 8 (suc...

AI Technical Summary

Problems solved by technology

[0015] 1. The underframe of the car body needs to be equipped with bushing installation holes, and the opening size of the lead wire hole of the car body is usually very large, generally 90×300mm

[0016] 2. It is necessary to install the lead-in clamp block installation bushing first, and then assemble the wire body, thus increasing the design, procurement and production cycle of the lead-in clamp block installation bushing

[0017] 3. In addition, in addition to the installation of the line clamp block and the bushing installation, complex operations such as the installation of sealing rubber pads and glue sealing are required. The on-site construction is complicated and the production cycle is long

[0018] 4. In the prior art, parts such as sealing rubber pads, sealant, rivet nuts, bolts, spring washers, and rivets used increase the cost of related parts

[0019] 5. The use of sealing rubber pads reduces the service life of the sealing structure and increases the difficulty of maintenance

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