JPS607400Y2 - Water jet nozzle for pile driving - Google Patents

Description

[Detailed description of the invention] This invention is attached to the tip of a pile that is driven into the ground.
This invention relates to a water jet nozzle for piling that sprays pressurized water as if excavating the ground, and in particular to a low-pressure, large-capacity nozzle that is suitable for sandy soil.

Generally, with this type of low-injection capacity nozzle, a large volume of water that is injected into the ground flows back to the ground as muddy water and flows into rivers and sewers, causing river pollution and clogging of sewer pipes. This has the disadvantage of making processing difficult.

The present invention has been made in order to improve the above disadvantages, and the object is to provide a nozzle that facilitates the treatment of muddy water.

To explain this with respect to the illustrated embodiment, reference numeral 1 indicates a high pressure nozzle, and the high pressure nozzle 1 has a conical surface on its outer wall.
a, and its rear end is formed into a cylindrical connection part 1b to which a high-pressure water supply pipe is connected, and its spout 1c is formed with a nozzle tip 1d which is detachably attached thereto.

Reference numeral 2 indicates a low-pressure nozzle, and the low-pressure nozzle 2 surrounds the high-pressure nozzle 1 and is integrally fixed to the high-pressure nozzle 1 via a mounting portion 1f having a communication hole 1e provided in the outer wall of the high-pressure nozzle 1, and then A cylindrical connection part 2a to which a low-pressure water supply pipe is connected is formed at the end thereof, and an annular conical passage 3 formed at the tip thereof between the conical surface 1a of the high-pressure nozzle 1;
A nozzle 4 whose cross section is a diverging nozzle following the annular conical path 3 is provided, and a chamber 5 is formed on the annular conical path 3, and a suction port 6 opening outward is provided in the yam bar 5. A plurality of wire meshes 7 are arranged in rows on the circumference, and a wire mesh 7 is placed around the outer periphery.

Since the present invention is constructed as described above, a negative pressure is formed in the annular conical path 3 of the low pressure nozzle 2 by the pressure water jetted from the nozzle 1c of the high pressure nozzle 1, and the negative pressure causes the inside of the low pressure nozzle 2 to be The water is sucked and a large amount of low-pressure water is spouted from the spout 4 of the low-pressure nozzle 2, thus excavating sandy ground and making it easier to drive piles. The muddy water flowing backward around the outer periphery of the nozzle 2 can be partially sucked in from the suction port 6 and reused, further reducing the rising backflow, and the muddy water flowing upward and flowing to the ground can be stored and strained. A large amount of water is reused when connecting to a low-pressure water supply pipe, and the pressure is
The pressure that can pump water up to the top of the pile to which the tip of the low-pressure water supply pipe is attached is sufficient.

In this way, according to the present invention, the low pressure nozzle 2 is provided surrounding the high pressure nozzle 1, and the high pressure nozzle 1 is connected to the low pressure nozzle 2.
Since an annular conical passage 3 is formed between the tip of the nozzle and the conical surface 1a of the outer wall of the nozzle, and a jet nozzle 4 with a wide cross-section is formed following this, it is possible to inject a large amount of low-pressure water, and the low-pressure nozzle 2 is provided with a suction port 6 located on the annular conical path 3 and opening outward through the chamber 5, so that a portion of the jetted water is automatically sucked and can be reused, reducing backflow. At the same time, excess water flowing to the ground can be used as feed water for low-pressure nozzles.
It has the effect of increasing water recovery efficiency, preventing secondary pollution due to muddy water returning to the ground, and increasing the amount of water injected.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view showing an embodiment of the present invention. 1... High pressure nozzle, 1a... Conical surface,
2...Low pressure nozzle, 3...Annular conical path, 4...Nozzle port, 5...Chamber 6
...Suction port.

Claims (1)

[Scope of utility model registration request] forming an annular conical path between a high-pressure nozzle that connects to high-pressure water and has a conical outer wall at its tip, and a conical surface that connects to low-pressure water and surrounds the high-pressure nozzle;
A low-pressure nozzle having a nozzle with a diverging cross section as a spout following the annular conical path, and the low-pressure nozzle is provided with a suction port located on the annular conical path and opening outward through a chamber. Water jet nozzle for pile driving.