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Injection head for injecting the pressurized fluid mixture to be consolidated into the subsurface

A technology of pressurized fluid and spray head, which is applied in the direction of liquid spraying device, spraying device, soil protection, etc. It can solve the problems of complex assembly, maintenance and disassembly steps, complex overall structure of water gun, high synthetic friction loss, etc.

Inactive Publication Date: 2016-06-08
TREVI LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, the advantages derived from reduced concentrated losses are limited by the fact that the fluid has very high velocities in the final length, very high resultant frictional losses
In addition, the presence of pipes, bends and radiuses greatly complicates the overall construction of the water gun, making assembly, maintenance and disassembly steps much more complicated

Method used

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  • Injection head for injecting the pressurized fluid mixture to be consolidated into the subsurface
  • Injection head for injecting the pressurized fluid mixture to be consolidated into the subsurface
  • Injection head for injecting the pressurized fluid mixture to be consolidated into the subsurface

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Embodiment Construction

[0022] Before providing a detailed description of the preferred embodiments of the invention, what follows sets forth the relevant criteria implemented for the realization of the invention and which are all based on the search for maximum jet efficiency. In this context, an energy analysis is performed on the motion of the fluid flow in the nozzle, analyzing the head loss. Considering the conditions exploited by the architecture of the water gun, the following emerged from these analyses:

[0023] - the inlet of the liquid flow is substantially perpendicular or parallel to the axis of the nozzle;

[0024] - the outlet of the liquid stream is substantially orthogonal with respect to the axis of the nozzle; and

[0025] - there is a central duct inside the water gun which is a free exit channel for the cooling fluid from the head of the rod,

[0026] In order to obtain the greatest possible efficiency (or the smallest loss of head), the path the fluid must take within the nozz...

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Abstract

The invention relates to a monitor (10) for spraying a pressurized fluid mixture to be solidified into the underground. The monitor comprises an external cylindrical body (12), at least one upper inlet (16) for fluid, at least one outlet nozzle (11) and at least one spiral pipeline (13) with a spiral central line (m). The upper inlet (16) is connected to the nozzle (11) through a pipeline, and the fluid passing by the pipeline is driven to do spiral movement around the longitudinal axis (Z) of the external body (12) and toward the nozzle (11). The spiral pipeline (13) is gradually thinned along a direction towards the nozzle (11), and the terminal length of the spiral pipeline is also gradually thinned; and when the monitor is seen from a cross section plane (P) which is parallel to the longitudinal axis (Z) and tangential to the spiral central line, and a cross section plane which is vertical to the longitudinal axis (Z), the terminal length is rounded to the nozzle in a thinning mode.

Description

technical field [0001] The present invention relates to a highly efficient injection head for injecting a pressurized fluid mixture to be consolidated into the ground to form a consolidated soil fraction. Background technique [0002] Columnar structures of artificial conglomerate are formed underground using a technique known as "jet grouting". These techniques are based on the mixing of the soil's own particles with a binder, often called a cement mix, which is passed under high pressure, usually through small diameter nozzle spray, said spray head is fixed near the lower end of a series of tubular rods, which are rotated and withdrawn towards the ground. At the bottom of this string of rods, below the water lance, a drilling tool is fixed, which during the excavation phase is lubricated by the drilling fluid supplied by said rods, which in this case act as conduits. [0003] The jets of binder are dispersed and mixed with the surrounding soil to form generally cylindric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D15/02E02D3/12B05B7/08
Inventor 切萨雷·萨卡尼
Owner TREVI LLC