Inflatable shield tail sealing device

Abstract

The invention discloses an inflatable shield tail sealing device which comprises a shield tail, a linear driver, a connecting rod and at least two airbags. Each airbag includes an airbag body, an airnozzle and a connecting piece, wherein one end of the air nozzle is inserted into the airbag body, the other end of the air nozzle is inserted into the connecting piece, and the two ends of the connecting piece are provided with a tenon and a mortise which can be meshed with each other; the connecting pieces of the adjacent airbags are meshed with each other, and the connecting pieces are embeddedin a groove of the shield tail; a gas pipeline is arranged in the shield tail; one end of the connecting rod is connected to a telescopic rod of the linear driver, and the other end of the connectingrod is embedded in the mortise of the connecting piece of the corresponding airbag. By means of the inflatable shield tail sealing device, fixing of the airbags is achieved through the tenons and themortises of the connecting pieces in cooperation with the groove of the shield tail, the design enables the airbags to remain fixed when the airbags are located inside the shield tail, after the airbags leave the shield tail, staggering and unhooking are quickly generated, the worn airbags can be abandoned by a user by executing the simple push-out action, meanwhile, the interior of the shield tail can be filled with a new airbag, so that the operation of replacing the airbag is greatly simplified.

Description

technical field [0001] The invention relates to the field of shield machines, in particular to an inflatable shield tail sealing device. Background technique [0002] figure 1 It is a structure diagram of a shield tail of a shield machine commonly used in the prior art, including a shield tail 1, three shield tail brushes 2, a grease pipeline 101 and a mud pipeline 102. The basic work flow is: with the work of the shield machine, the shield tail 1 keeps moving forward ( figure 1 move to the left in middle), segment 3 also increases accordingly ( figure 1 Segment 3 is continuously increased in the middle, so that segment 3 extends to the left), during this process, mud pipeline 102 is filled with mud 5 between segment 3 and soil layer 4, and grease pipeline 101 is filled between shield tail brush 2 Fill the space with grease6. The grease 6 and the shield tail brush 2 form a seal together to prevent the mud 5 from entering the shield tail 1. [0003] The seal structure of...

AI Technical Summary

Problems solved by technology

The defect of this airbag structure is that the working environment of the shield machine is very harsh. In the underground high-pressure environment, the airbag will inevitably produce friction with the segment, mud and soil layer, and the wear and tear will consume a lot, so it must be replaced frequently; but the airbag is in In the gap between the tail of the shield and the segment, the space is very narrow and difficult to replace

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