Pipe blocking device and pipe connection apparatus employing the same

Abstract

The invention relates to a pipeline obturator, which comprises a front end plate, a sealing piece, pressure plates I, pressure plates II and a rear end plate. The sealing piece consists of a high-pressure dense volume plate clamped between two abrasion resistant sealing plates. The front end plate is fixedly connected with the pressure plate I; at least one sealing piece is clamped between the front end plate and the pressure plate I, and one pressure plate II is pivoted with the pressure plate I through a pivot piece. The rear end plate is fixedly connected with the other pressure plate I, and at least one sealing piece is clamped between the rear end plate and the pressure plate I. The other pressure plate II is pivoted with the pressure plate I through a pivot piece. The pivot shaft axes of the two pivot pieces are perpendicular mutually, and the two pressure plates II are connected firmly through bolts. The high-pressure dense volume plate mainly used for sealing is clamped between the two abrasion resistant sealing plates through the design to prevent abrading the high-pressure dense volume plate. The two pairs of pressure plates I and pressure plates II of the pipeline obturator are pivoted and connected through the pivot pieces and pivot shafts are perpendicular mutually, so that a bent pipe with high curvature can pass through the pipeline obturator without fluently.

Description

technical field [0001] The invention relates to a pipeline choke, in particular to a pipeline choke used in mud-water pressurized shield transmission and mud discharge pipelines. The invention also relates to a connection device using the pipeline blocker. Background technique [0002] The muddy water pressurized shield is to install a partition on the rear side of the front cutterhead of the mechanical digging shield, and a muddy water pressure chamber is formed between it and the cutterhead, and the pressurized muddy water is sent into the muddy water pressure chamber, through the pressurization and The pressure maintains the mechanism to seek the stability of the excavation surface. [0003] The excavation mechanism of the mud-water balance shield is: the mud-water conveying system sends the low-concentration mud to the mud-water pressure chamber through the mud pump, and the mud cut by the cutterhead of the shield machine is stirred into a high-concentration mud by the ...

AI Technical Summary

Problems solved by technology

[0010] However, when the current pipeline occluder 36 moves in the welded pipeline, the sealing ring plate 367 will cause wear when it passes through the steel pipe weld, and will cause a decrease in sealing performance after repeated wear; During operation, due to the relationship between the hinge shaft 364 and the hinge sleeve 365, the two hinge sleeves 365 can only make small movements in the direction perpendicular to each other, so when passing through a bend with a large curvature, the got stuck

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