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Airbag piston (for slurry shields) for blocking pipes

A technology of mud-water shield and air bag, which is applied in the direction of tunnels, pipe elements, pipes/pipe joints/pipe fittings, etc. It can solve the problem that it cannot be pushed back to the original position, the sponge balloon cannot be pushed and pushed back smoothly, and the pipeline cannot Sealing etc.

Inactive Publication Date: 2013-12-04
上海尤加工程机械科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of the friction force generated when the sponge balloon expands, the pipeline cannot be reliably sealed. If the friction force generated during inflation is too large, the sponge balloon cannot be pushed and pushed back smoothly. When the balloon is advanced to the head of the tube and cannot be pushed back to its original position, a lot of trouble will arise at this time
Therefore, there is a lack of a plugging device with good plugging effect and easy entry and exit.

Method used

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  • Airbag piston (for slurry shields) for blocking pipes

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Embodiment Construction

[0015] Such as figure 1 As shown, the air bag piston used for plugging pipelines in the muddy water shield of the present invention includes a front end cover 8 and a first air bag 2, and the front end cover 8 is provided with an inflation nozzle 3 to be connected with the first air bag 2, and a rigid air bag 2 is provided in the first air bag. The bracket 1, the first airbag 2 are fixedly connected with the front end cover 8 and the rigid support 1, and the front end cover 8 is also provided with a push-pull rod connector 9, which can be connected with the push rod of the stretching device, and automatically through the hydraulic system. The pushing or pulling back of the driving push rod is controlled to drive the movement of the air bag. It also includes a second airbag 6 with a rigid bracket inside, the second airbag 6 is fixedly connected with the first airbag 2 through an intermediate bracket 5 , and the second airbag 6 is also communicated with the inflation nozzle 3 . ...

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Abstract

The invention discloses an airbag piston (for slurry shields) for blocking pipes, which comprise a front end cover and a first airbag, wherein the front end cover is provided with a charging connector connected with the first airbag, the inside of the first airbag is provided with a rigid support, the first airbag is fixedly connected with the front end cover and the rigid support, and the front end cover is provided with a push-pull bar linker. When being pulled forwards or drawn back, the airbag piston disclosed by the invention is in a no-air-pressure flabby state; and when the airbag piston is pulled forwards to a required position, an air pressure is injected into an airbag from the outside, so that because of the air pressure, the airbag piston is expanded, and a great friction force is produced between the airbag piston and the inner wall of a steel tube so as to effectively seal slurry.

Description

technical field [0001] The invention relates to the technical field of tunnel excavation mud-water shield, in particular to a mud-water shield used to seal [0002] The airbag piston that is easy to enter and exit when blocking muddy water pipes. Background technique [0003] Large-diameter mud-water balance shields inject certain pressure water through the ground during tunnel excavation to generate a certain balance pressure between the cutter head and the soil layer to ensure that the soil layer in front will not collapse. At the same time, the pressure water dilutes the excavated soil and pumps it out through the mud pump. To the ground for mud-water separation. Due to the continuous advancement of the shield, the steel pipes that inject pressure water from the ground into the front of the shield and the steel pipes that discharge mud from the head of the shield to the ground need to be connected continuously. If they are opened and separated, a large amount of muddy w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L55/128E21D9/08
Inventor 张永洲任意荣朱德奇
Owner 上海尤加工程机械科技有限公司