Sealer for sealing grouted wellhead

Abstract

The invention discloses a sealer for sealing a grouting wellhead. The sealer comprises an upper cylinder body and a lower cylinder body, wherein the upper cylinder body and the lower cylinder body are each provided with an inner hole and are connected in a rotating mode. The inner hole of the lower cylinder body is internally transversely provided with a supporting plate with an inner hole. The supporting plate is provided with an elastic sealing body with an inner hole. The lower end of the upper cylinder body stretches into the inner hole of the lower cylinder body. The upper cylinder body is provided with a rotating handle and a side supporting pipe. A middle hole of the side supporting pipe is communicated with the inner hole of the lower cylinder body. The side supporting pipe is provided with a pressure gage and an overflow valve. By means of the sealer, the grouting wellhead can be totally sealed, concrete slurry is prevented from flowing backwards through the grouting wellhead in the pressurization grouting process, and waste of the concrete slurry is avoided; it is guaranteed that cement slurry is poured under the pressure required by the process, the packing character of the concrete slurry is improved, related seams are fully filled, and the strength of a grouting layer is improved; the overflow valve is arranged, when the pressure of the concrete slurry in the lower cylinder body exceeds the set value, the overflow valve is opened, redundant slurry is discharged, and the pressure value required by the process is maintained.

Description

technical field

[0001] The invention relates to a tool for drilling and grouting construction operations, in particular to a sealer for sealing the grouting wellhead. Background technique

[0002] In geological construction, it is necessary to pour cement slurry (grouting) into the ground, such as filling underground gaps, strengthening the foundation, etc., the injected cement slurry fills the gaps, fills the gaps after solidification, and enhances the strength of the underground parts to meet the technical requirements. need. During the grouting operation, firstly, a hole is drilled downward with a drilling rig according to the technological requirements, and then concrete slurry is injected into the hole, and the concrete is cured until the concrete is solidified. However, because the concrete slurry is injected under a certain pressure, it is easy to pour out from the grouting wellhead, resulting in waste of materials, and the grouting operation cannot reach the require...

Images