A controllable bidirectional pulp stop device for sleeve valve tube

Abstract

The invention discloses a controllable two-way slurry stop device for a sleeve valve tube, comprising a round table metal slider, a polyurethane slurry stop plug, a ring-shaped suction cup electromagnet, a limit stop and a reset spring group. When the iron is energized, under the action of electromagnetic force, the round table metal slider is sucked to the ring-shaped suction cup electromagnet, thereby squeezing the polyurethane slurry stopper to force its cantilever to deform, wedging the sleeve valve tube, and at the same time, the return spring group is elongated; When the ring-shaped suction cup electromagnet is powered off, the metal block of the circular table rebounds, and the return spring group recovers its deformation, which assists the metal block of the circular table to be disengaged from the polyurethane slurry stopper, so that the slurry stopper recovers its deformation and is connected with the sleeve valve tube. wall detachment. The grouting device of the present application can be manually controlled to open and close, thereby ensuring the smooth lowering and lifting of the grouting device, improving the grouting efficiency and the stability of the grouting effect.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a controllable two-way pulp stop device for a sleeve valve tube. Background technique [0002] Sleeve valve grouting method is a grouting method developed and researched by French Soletanche Foundation Engineering Company, which is recognized internationally as a more reliable method. In the late 1980s, it was used in permeation grouting in sand gravel layer and sand pebble layer, split grouting in soft soil and split grouting in deep soil. In view of the fact that the sleeve valve pipe grouting has good effects of reinforcement, anti-seepage, and plugging, it is widely used in foundation pit curtains, soft soil roadbed reinforcement and other projects. [0003] The basic process and principle of grouting the sleeve valve pipe are as follows: the slurry is pressurized by the grouting pump and then enters the grouting pipe through the connecting pipe. Under...

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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