Nozzle with check valve for pile construction device, pile construction device with check valve, and pile construction method

摘要

To provide a nozzle with a check valve for a pile construction device excellent in sealability, a pile construction device with a check valve using the same, and a pile construction method. A nozzle with a non-return valve for a pile construction device is reverse to the pile construction device having a flow path for supplying a fluid into a pile hole, which is applied to be able to open and close the flow path. In a nozzle with a stop valve, it has an annular valve seat directed downstream in the fluid supply direction, a valve body having a seal edge that can be attached to and detached from the valve seat, and one end connected to the valve body A valve rod extending upstream in the fluid supply direction from the valve body, and provided upstream of the valve seat in the fluid supply direction, and sliding the valve rod in the axial direction of the valve rod A support portion for freely supporting, a spring seat portion attached to the other end side of the valve rod, and a coil spring disposed between the support portion and the spring seat portion to bias the valve body toward the valve seat; And the valve body makes linear contact with the valve seat when the valve is closed. [Selected figure] Figure 3