A rolling support type sealing device for the relay room of the rectangular shield pipe jacking machine

Abstract

A rolling supporting type sealing device for an intermediate jacking station of a rectangular shield tube jacking machine comprises a supporting wheel device and an adjustable sealing device. The supporting wheel device and the adjustable sealing device are both arranged on a step face at the tail portion of a front casing, and the supporting wheel device and the adjustable sealing device are respectively fixed to the two ends of a blocking plate in a rear casing. The supporting wheel device comprises an external slide rail, a shield seal, a mandrel, an inner sliding beam, a stopping sealing cover and a puller bolt, wherein a supporting wheel is arranged on the inner sliding beam through the mandrel, the inner sliding beam is surrounded by the external slide rail, the stopping sealing cover is fixed to the external slide rail, and the puller bolt penetrates through an internal thread of the stopping sealing cover and is tightly attached to the top of the inner sliding beam. The supporting wheel device can roll relative to the tail portion of the front casing and can effectively guarantee the gap between the tail portion of the front casing and a foundation ring. Thus, the stability of the compression amount between the shield seal and the tail portion of the front casing is guaranteed, the service life of the shield seal is prolonged, the fitting degree between the jacking direction and the tunnel axis is improved, and the jacking efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of tunnel excavation, in particular to a rolling support type sealing device applicable to relay rooms of shield pipe jacking machines with rectangular excavation sections. Background technique [0002] With the sustained and steady growth of our country's economy and the further acceleration of the urbanization process, the demand for underground pipelines in our country is also increasing year by year. Coupled with the enhancement of people's awareness of environmental protection, pipe jacking technology will play an increasingly important position and role in the construction of underground pipelines in our country. [0003] With the support of my country's rapid economic growth, the development of pipe jacking technology has ushered in unprecedented opportunities. In the future, pipe jacking technology will be widely used in the construction of underground pipes, rainwater pipes, sewage pipes, power pipe...

AI Technical Summary

Problems solved by technology

The construction of the rectangular shield pipe jacking machine is more difficult. If the sealing technology of the existing pipe jacking machine is directly used, a good sealing effect cannot be achieved

At present, most of the existing relay room schemes are in the form of two seal rings, that is, two seals are built in the two grooves on the base ring. When the front shell and the rear shell slide relative to each other, theoretically the two seals are respectively The tread at the rear of the front casing is in contact with the tread. In fact, due to the heavy weight of the pipe joint, the foundation ring often contacts the tread, which causes the roughness of the tread to be damaged during relative sliding and the two seals are severely squeezed by the huge load, so that the relay The effective time and performance of the sealing device between

Images