The present invention provides an improved pipeline burying apparatus that uses specially configured jetting nozzles that intake sea water surrounding the nozzle. The apparatus provides a frame supporting spaced apart left and right inclined pipe sections that are configured to be placed on opposing sides of the pipeline to be buried. Each inclined pipe section is fitted with a plurality of jetting nozzles that are positioned on one of the inclined pipe sections, in vertically spaced apart positions and in horizontally spaced apart positions. At least some of said jetting nozzles include a nozzle body having an outer surface and a main, central longitudinal fluid flow channel with a central channel axis. A fluid inlet end portion of the nozzle body has an externally threaded portion that enables connection to an internally threaded portion of a selected one of the inclined pipe sections. A discharge end portion of the nozzle body extends outwardly from an inclined pipe and the threaded portion. A plurality of lateral channels each intersect the main channel at an acute angle. In one embodiment, the main central longitudinal channel has an inlet section with an inlet section diameter, a discharge section having an outlet section diameter and a connecting section that is in between the inlet section and the outlet section.

A method of moving an underground pipeline including the steps of: driving a casing into a soil proximate to the pipeline; deploying a pivoting wand from the casing about a pivoting axis, the pivoting wand having a plurality of cutting nozzles that are coupled to a fluid conduit having a longitudinal extent in the casing relative to a longitudinal axis; pressurizing the fluid conduit to thereby send fluid through the cutting nozzle to soften the soil in a direction in which the wand deploys; rotating the pivoting wand; conducting the softened soil up through the casing to form a cavity in the soil proximate the pipeline, the cavity in the soil having a shape reflective of the movement of the pivoting wand in the rotating step; positioning a lifting device beneath the pipeline. And, lifting the pipeline with the lifting device thereby drawing the pipeline toward or into the cavity.

An anti-sedimentation system can implement a method in which a pump pumps seawater to a discharge nozzle positioned under the seawater and facing an under keel clearance of a marine vessel docked at a dock. Sediments are flowed away from the under keel clearance by the discharge nozzle discharging the seawater toward the under keel clearance.

There is disclosed an excavation apparatus (5), such as an underwater excavation apparatus, having means for producing, in use, at least one vortex, spiral or turbulent flow in a laminar flow of fluid, e.g. water. The excavation apparatus (5) comprises a rotor (10) having a rotor rotation axis (A), wherein, in use, flow of fluid past or across the rotor (10) is at a first angle (α) from the axis of rotation (A). The excavation apparatus (5) comprises the rotor (5) and means or an arrangement for dampening reactive torque on the apparatus (5) caused by rotation of the rotor (10), in use. The turbulent flow is provided within, such as within a (transverse) cross-section, of the laminar flow.

There is disclosed an excavation apparatus (5), such as an underwater excavation apparatus, having means for producing, in use, at least one vortex, spiral or turbulent flow in a laminar flow of fluid, e.g. water. The excavation apparatus (5) comprises a rotor (10) having a rotor rotation axis (A), wherein, in use, flow of fluid past or across the rotor (10) is at a first angle (a) from the axis of rotation (A). The excavation apparatus (5) comprises the rotor (5) and means or an arrangement for dampening reactive torque on the apparatus (5) caused by rotation of the rotor (10), in use. The turbulent flow is provided within, such as within a (transverse) cross-section, of the laminar flow.

An omnidirectional blast media dispensing apparatus mounted to an excavator and designed to dispense abrasive media from a blast pot is provided. The apparatus adjusts directional flow of the abrasive media exiting the apparatus to contact a desired target. The apparatus includes a housing coupled to the boom of the excavator, a hydraulic motor assembly coupled to the housing and operably connected to hydraulic lines of the excavator, and a main tubular member rotatably mounted to the housing and operably connected to the hydraulic motor assembly. The first end of the main tubular member is coupled to the blast pot and a nozzle is coupled to the second end of the main tubular member. Fluid flows from the hydraulic lines of the excavator to the hydraulic motor assembly to enable the hydraulic motor assembly to rotatably adjust the main tubular member to direct the nozzle toward the target.

A grapevine soil-cleaning device and engineering machinery installed with the soil-cleaning device, comprising an air blower (4), an air vent direction reversal device, a soil-retaining device, an angular sensor (7) and a controller (19). The controller (19) is connected to the air blower (4), the angular sensor (7), the air vent direction reversal device and the soil-retaining device respectively. The present device achieves non-contact soil cleaning by blowing air, and has the advantages of no harmful impact on buds and branches, one-time cleaning, and highly efficient soil cleaning. The air vent direction reversal device may achieve a consistent air-blowing direction when the grapevine soil-cleaning device moves among rows of the grapevine. The soil-retaining device may hold back the blown soil and reduce the displacement distance of the blown soil. An auxiliary air pipe is provided below a main air pipe to assist soil-cleaning operations and avoid generating pits on a ridge due to concentrated wind power of the main air pipe. The air vent direction reversal, adjustment of the air power of the air blower and automated direction reversal of the soil-retaining device when moving among ridges are achieved by using the angular sensor (7) and the controller (19), thus achieving a high level of technological intelligence.

The present invention provides an improved pipeline burying apparatus that uses specially configured jetting nozzles that intake sea water surrounding the nozzle. The apparatus provides a frame supporting spaced apart left and right inclined pipe sections that arc configured to be placed on opposing sides of the pipeline to be buried. Each inclined pipe section is fitted with a plurality of jetting nozzles that are positioned on one of the inclined pipe sections, in vertically spaced apart positions and in horizontally spaced apart positions. At least some of said jetting nozzles include a nozzle body having an outer surface and a main, central longitudinal fluid flow channel with a central channel axis. A fluid inlet end portion of the nozzle body has an externally threaded portion that enables connection to an internally threaded portion of a selected one of the inclined pipe sections. A discharge end portion of the nozzle body extends outwardly from an inclined pipe and the threaded portion. A plurality of lateral channels each intersect the main channel at an acute angle. In one embodiment, the main central longitudinal channel has an inlet section with an inlet section diameter, a discharge section having an outlet section diameter and a connecting section that is in between the inlet section and the outlet section.

An excavation apparatus comprises a controlled flow underwater excavation apparatus. A housing thereof comprises at least one inlet and at least one outlet. The at least one inlet is provided on or at a side of the housing. A fluid flow path extends from the/each at least one inlet to the outlet. The fluid flow path comprises a first portion provided at or adjacent the/each at least one inlet. The first portion is included at a non-300 angle, e.g. is substantially perpendicular, to or converges towards a longitudinal axis of the housing and substantially straight. A second portion extends or continues from the first portion. A third portion extends or continues from the second portion. The third portion is substantially straight, contains at least part of a rotor, and is divergent away from the longitudinal axis of the housing in a flow direction from the inlet to the outlet.

A plug device for covering a cavity excavated in the ground. The plug device includes a head defined by a plate having a planar upper surface and a planar lower surface, wherein the plate has a size that corresponds to a size of the excavated cavity. The plug device also includes a plurality of anchor members extending axially away from the planar lower surface, and that are configured to secure the plug device to the cavity.