| 摘要 |
The invention relates to an injection valve which can be used for injecting slurry near the wall of stakes driven into the ground. It includes a core 8 capable of being engaged by screwing into a tapped orifice 5 made in the injection tube 3 from the outside of the stake, the said core 8 further including a central cavity 10 which opens out towards the inside of the injection tube 3 and which is joined to the periphery of the core 8 by slightly diverging channels 11 to conduct the injection slurry, the said core being provided with retention members 14 for keeping a tubular rubber sleeve 12 located at its periphery in order to block the aforementioned diverging channels 11, as well as a compressible ring 13 made from an elastomer foam located on the said sleeve 12 and the body 4 of the valve, the sleeve 12 returning against the core 8 of the valve when the pressure which prevails inside the injection tube 3 is lower than the pressure which prevails outside the tubular stake. <IMAGE>
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