Rapid grouting stop valve and grouting stop method thereof

The invention relates to a rapid grouting stop valve. The rapid grouting stop valve comprises a valve body, a inlet pipe and a outlet pipe; the lower end of the valve body communicates with the inlet pipe, and the upper end of the valve body communicates with the outlet pipe; a sphere baffle and an adjusting sphere are installed in the valve body, wherein the sphere baffle is located on the upper part of the adjusting sphere and close to the outlet pipe; a through hole corresponding to the outlet pipe is formed in the sphere baffle, and the diameter of the through hole is smaller than the diameter of the adjusting sphere; and the adjusting sphere is located at a outlet of the feeding pipe and corresponds to the through hole. The rapid grouting stop valve has the advantages that high-pressure slurry can be effectively blocked in the valve body and spilling during the process of installing a withdrawing pipe is not caused, so that the amount of gel is saved, and a good fireproof function is achieved. 本发明涉及种快速注浆