Controllable two-way grout stopping device for sleeve valve pipe

Abstract

The invention discloses a controllable two-way grout stopping device for a sleeve valve pipe. The controllable two-way grout stopping device comprises a circular truncated cone metal sliding block, a polyurethane grout stopping plug, an annular sucker electromagnet, a limiting stop block and a reset spring group, when the annular sucker electromagnet is electrified, under the action of electromagnetic force, the circular truncated cone metal sliding block is attracted to the annular sucker electromagnet, therefore, the polyurethane grout stopping plug is extruded to force the cantilever to deform, the sleeve valve pipe is wedged, and meanwhile the reset spring set is lengthened, when the annular suction cup electromagnet is powered off, the circular truncated cone metal sliding block rebounds, meanwhile, the reset spring set recovers deformation and assists the circular truncated cone metal sliding block to be disengaged from the polyurethane grout stopping plug, and therefore the grout stopping plug recovers deformation and is disengaged from the pipe wall of the sleeve valve pipe. According to the controllable two-way grout stopping device, opening and closing of the grouting stopping device can be manually controlled, so that it is guaranteed that the grouting device is smoothly lowered and lifted, and the grouting efficiency and the stability of the grouting effect are improved.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a controllable two-way slurry stop device for sleeve valve pipes. Background technique [0002] The sleeve valve pipe grouting method is a grouting method developed and researched by the French Soletanche Basic Engineering Company. It is internationally recognized that this method is relatively reliable. At the end of the 1980s in China, it began to be used in the infiltration grouting of sandy gravel layer and sand pebble layer, soft soil splitting grouting and deep soil splitting grouting. In view of the good reinforcement, anti-seepage and plugging effects of sleeve valve pipe grouting, it is widely used in foundation pit curtain, soft soil roadbed reinforcement and other projects. [0003] The basic process and principle of sleeve valve pipe grouting are as follows: the grout enters the grouting pipe through the connecting pipe after being pressurized b...

AI Technical Summary

Problems solved by technology

However, the polyurethane (rubber) sealing ring grout stopper has certain disadvantages. When grouting in clay or medium-fine sand and other formations, the grouting pressure is often high. When the grouting pressure is greater than 2MPa, the cup will not The type grout stopper is easy to turn over or be pulled off, which leads to the series connection of the cups, the grout stopper cannot be reset, and the grout stopper jams the tube, and it is very difficult to lift the tube; for some deep hole grouting, because the grouting device is lowered deeply, Under the action of the grouting pressure, a "syringe" effect is formed, and it is also very difficult to lift the tube; at this time, if a large lifting force is used, the threaded connection parts of the flower tube will be disconnected, and eventually the flower tube and the grouting tube will be broken. scrapped

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