JP2780557B2 - Drilling suction nozzle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drilling suction nozzle, and more particularly, to a drilling suction nozzle having excellent breaking ability.

[0002]

2. Description of the Related Art
As a drilling suction nozzle for dredging for excavating the seabed, a nozzle provided with a high-pressure water jet or a high-pressure water or air nozzle for jetting high-pressure air in the direction opposite to the suction direction on the outer periphery of a cylindrical body is used. However, this method excavates relatively easily excavated sea bottom sand almost vertically (for example, see Japanese Patent Application Laid-Open No. 61-12233).
However, there is still a problem that the resistance of the high pressure water jet is attenuated due to the resistance due to seawater, and as a countermeasure, a cover is provided on the outer periphery of the excavation suction nozzle. In addition, for excavating an underground hole, a tubular body having a body length may be used as a guide cylinder for a drilling nozzle. It also had the purpose of preventing borehole collapse.

However, when used to discharge deposits such as sludge deposited on the inner bottom of various tanks and the like, the digging ability of these conventional digging and suction nozzles was extremely insufficient.

[0004] In the prior art, the excavating operation relied exclusively on high-pressure water or high-pressure air jet. Therefore, when the discharge target is a solid, the pressure and speed of the high-pressure water or high-pressure air jet are naturally increased to increase the excavation capacity. It was usual to improve. However, the suction amount of the suction nozzle has to be increased by that much, and the discharge amount per unit time of the true target discharge material tends to decrease as a whole.

[0005] In addition, water-hateful substances such as CaO
In the case of effluents whose quality is the main component, high pressure
When a large amount of water is supplied by a water jet, CaO + H₂ O → Ca (OH)₂  May produce a chemical reaction with the heat of
Unnecessary chemical reactions change the properties of waste
There was something.

More specifically, when an object to be discharged, which is usually a solid-liquid mixture, broken and sucked by a high-pressure water jet moves through the nozzle at high speed, friction occurs due to local solid collision against the inner wall of the nozzle. And, in turn, generate static electricity and discharge, igniting combustible discharges and sometimes triggering explosion phenomena.However, conventional drilling suction nozzles have no measures against these phenomena. Is the actual situation.

The present inventors have conducted intensive studies to effectively solve these problems, and as a result, have found that the problems can be solved by providing the nozzle with a movable sub-cylinder, and have completed the present invention.

[0008] An object of the present invention is to provide a drilling suction nozzle having a drastically improved drilling capability without increasing the amount of high-pressure water jet spouted and without causing a change in the properties of the discharged material. .

Another object of the present invention is to provide a safe excavation suction nozzle which does not cause a fire explosion on an object to be discharged even when static electricity is generated.

[0010]

Means for Solving the Problems The present invention solves the above-mentioned problems and achieves the above-mentioned objects, and is a drilling suction nozzle having the following configuration. (1) A main cylinder body having one or more high-pressure water jet nozzles and one or more fluid pressure cylinders arranged on the outer periphery, and a sub-cylinder body having a plurality of excavating claws fixed to the tip. The sub-cylinder is externally or internally inserted into the main cylinder, and is fixed to the tip of the fluid pressure cylinder, and the sub-cylinder is configured to be slidable in the axial direction of the main cylinder. , And further
Providing lubricating property to discharged matter moving in the main cylinder
Lubricant nozzle for supplying lubricant to the main cylinder
A drilling suction nozzle characterized by being provided through a wall . (2) Consists of a main cylinder body having one or more high-pressure water jet nozzles and one or more fluid pressure cylinders arranged on the outer peripheral part, and a sub-cylinder body having a plurality of excavating claws fixed to the tip. The sub-cylinder is externally or internally inserted into the main cylinder, and is fixed to the tip of the fluid pressure cylinder, and the sub-cylinder is configured to be slidable in the axial direction of the main cylinder. , And the main cylinder
Explosion-proof properties are not provided to expel
The inert gas nozzle for supplying the active gas is
A drilling suction nozzle characterized by being provided through a cylindrical wall of the above . (3) Consists of a main cylinder body having one or more high-pressure water jet nozzles and one or more fluid pressure cylinders arranged on the outer periphery, and a sub-cylinder body having a plurality of excavating claws fixed to the tip. The sub-cylinder is externally or internally inserted into the main cylinder, and is fixed to the tip of the fluid pressure cylinder, and the sub-cylinder is configured to be slidable in the axial direction of the main cylinder. , And further
Providing lubricating property to discharged matter moving in the main cylinder
Lubricant nozzle for supplying lubricant to the main cylinder
Provided through the wall and further moving within the main cylinder
Supply an inert gas that gives explosion protection and promotes emission
The inert gas nozzle through the cylinder wall of the main cylinder
A drilling suction nozzle characterized by being provided . (4) a vibration generator to Fukutsutsu side to fluid pressure cylinder series provided, characterized in that the secondary cylindrical body and the excavation pawl projecting from its distal end to allow vibration in the axial direction (1) Terms or
(3) The drilling suction nozzle according to any one of the above (3) .

[0011]

Embodiments of the present invention will be described below. FIG. 1 shows a state in which the excavation suction nozzle according to the present invention is contracted.
Side view for explaining, 2 is a side view for explaining the extension time state of the drilling suction nozzle, FIG. 3 is a side view when contraction embodiment excavation suction nozzle of the present invention, FIG. 4 is the present It is a side view at the time of extension of the drilling suction nozzle of an Example of the invention .

1 to 4, reference numeral 10 denotes a main cylinder, 11
Is a high pressure water jet nozzle, 12 is a high pressure water jet nozzle tip, 15 is a main cylinder tip, 16 is a fluid pressure cylinder,
17 is a piston rod of a fluid pressure cylinder, 18 is a lubricant nozzle, 19 is an inert gas nozzle, 20 is a sub cylinder, 25
Is a claw for excavation, and 30 is a vibration generator. In addition, combustible deposits such as sludge deposited on the inner bottom of an oil tank or the like and other objects to be discharged are sucked into the main cylinder 10 from the main cylinder tip 15 and discharged to the outside. Sent to a powerful suction work vehicle.

At least one high-pressure water jet nozzle 11 and a plurality of hydraulic cylinders 16
Are fixed along the axial direction by means such as welding or bolting.

The high-pressure water jet nozzle tip 12 is disposed so as to aim in front of the tip of a drilling claw 25 described later.

[0015] Then, the sub cylindrical body 20 is mainly cylindrical member 10 Right 1 /
It is covered with the main cylindrical body 10 covering 2 to 1/3.

However, the wheels provided inside the sub-cylinder 20 follow the axially extending rails radially provided on the outer periphery of the main cylinder 10, and the fluid fixed to the left end. By the piston rod 17 of the pressure cylinder 16,
The sub cylinder 20 is slidable in the axial direction of the main cylinder 10. Therefore, the auxiliary cylinder 10 can be contracted or retracted or extended as required (arrow A).

Further, three excavating claws 25 are fixed to the right end of the sub-cylindrical body 20 by welding. The excavation claw 25 is made of a material having excellent hardness and toughness such as, for example, high-speed steel, hatfield steel, high-carbon steel, and the like. A diamond chip or the like obtained by sintering industrial diamond may be provided.

Further, a vibration generator 30 may be fixedly or pivotally attached to the left end of the sub-cylinder 20.

The left end of the vibration generator 30 is pivotally mounted or fixed to the piston rod 17 of the hydraulic cylinder 16.

As the vibration generator 30 itself, various types such as a compressed air type and an electric type used for a well-known rock drill are suitably applied.

In any case, even if the excavating claw 25 strikes against hard solidified sludge or the like, the vibration generator has an output sufficient to give an effective impact force (in the direction of arrow B) thereto. is important.

In the present embodiment, the vibration generating device 30 is annular, but a device having a relatively small diameter such as a rock drill may be arranged in series with each piston rod 17.

As shown in FIGS. 3 and 4 , in the embodiment of the present invention , the main cylinder 10 is further provided with a lubricant nozzle 18 and an inert gas nozzle 19.

Each of these nozzles 18 and 19 is provided so as to penetrate the cylindrical wall of the main cylindrical body 10 to supply a lubricant or an inert gas to the discharged material moving leftward on the inside. I do.

The lubricant is water, low-viscosity waste oil (for example, engine oil waste oil), bilge or O / W or W / O type emulsion, kerosene, heavy oil A and the like. Since waste oil, bilge, and emulsion are industrial waste, they are reused and effective for recycling. Water is the lowest cost, but kerosene and heavy oil A may be used when water cannot be used, as in the case where the discharged material contains CaO, or when high viscosity crude oil tank sludge is used.

When these lubricants are applied to the object to be discharged from the nozzle 18, the coefficient of friction between the cylindrical wall and the inner wall of the suction pipe is reduced, so that the object to be discharged is easily moved and the generation of static electricity is reduced. Become.

As the inert gas, CO ₂ , N ₂ or the like is used. When such an inert gas is applied to the material to be discharged, the air is purged, thereby lowering the oxygen partial pressure in the atmosphere inside and outside the material to be discharged, preventing explosion and ignition even if a spark due to static electricity occurs. Can be very secure. That is, explosion-proof property is provided.

Next, FIG. 5 is an operation view showing a situation in which sludge in the tank is cleaned by using the excavation suction nozzle 1 according to the embodiment of the present invention.

In FIG. 5, reference numeral 100 denotes sludge, 110
Is a stationary tank, 111 is a tank opening, 200 is a manipulator with a rubber track, 202 is a supporting arm, 300 is a hydraulic source (external power vehicle), 303 is a hydraulic hose, 400 is a hydraulic source (high pressure washer), 500 is a vacuum A tank (powerful suction work vehicle) 505 is a suction hose.

The excavation suction nozzle 1 according to the embodiment of the present invention is fixed to the tip of the support arm 202 of the manipulator 200, and the angle and the position can be freely changed. 110
It is needless to say that may be a tank in a ship which is a stationary tank. The manipulator 200 may be remotely controlled from outside the tank, or may be operated by a person if the environment inside the tank is not bad. In the case of remote control, a sensor such as an ITV camera is required, and a wired or wireless electric control system is required. In particular, when explosion-proof property is required, it is possible to perform remote control using hydraulic, pneumatic or hydraulic systems.

In any case, the sludge (object to be discharged) 100 excavated, crushed and sucked by the excavating suction nozzle 1 according to the embodiment of the present invention is sucked into the vacuum tank 500 through the suction hose 505, and is sucked into the tank. Cleaning is easily performed.

[0032]

According to the excavation suction nozzle of the present invention, it is possible to move the discharged material without increasing the amount of high-pressure water jet ejected and without causing a change in the properties of the discharged material.
This facilitates the generation of less static electricity and can exhibit an improved excavation ability. In addition, even when static electricity is generated, it is possible to prevent a fired explosion from occurring in the discharged material, and to ensure safety.

[Brief description of the drawings]

[1] Description of systolic state of excavation suction nozzle according to the present invention
Side view for clarification,

FIG. 2 illustrates a state in which a drilling suction nozzle according to the present invention is extended.
Side view for clarification,

FIG. 3 is a side view of the embodiment of the present invention when the excavation suction nozzle is contracted;

FIG. 4 is a side view of the embodiment of the present invention when the excavation suction nozzle is extended;

FIG. 5 is an operation explanatory view of the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drilling suction nozzle 10 Main cylinder 11 High pressure water jet nozzle 16 Fluid pressure cylinder 18 Lubricant nozzle 19 Inert gas nozzle 20 Secondary cylinder 25 Drilling claw 30 Vibration generator

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E02F 3/92

Claims (4)

(57) [Claims] 1. A main cylinder having one or more high-pressure water jet nozzles and one or more fluid pressure cylinders disposed on an outer periphery thereof, and a sub-cylinder having a plurality of excavating claws fixed to a tip thereof. Consisting of
The sub-cylinder is externally or internally inserted in the main cylinder, and is engaged with a tip of the fluid pressure cylinder,
The sub cylinder is configured to be slidable in the axial direction of the main cylinder ,
In addition, lubrication is applied to the objects moving in the main cylinder.
A lubricant nozzle for supplying lubricant
An excavation suction nozzle characterized by being provided through a cylindrical wall of a cylindrical body . 2. A main cylinder body having one or more high-pressure water jet nozzles and one or more fluid pressure cylinders disposed on an outer periphery thereof, and a sub-cylinder body having a plurality of excavating claws fixed to a tip end thereof. Consisting of
The sub-cylinder is externally or internally inserted in the main cylinder, and is engaged with a tip of the fluid pressure cylinder,
The sub cylinder is configured to be slidable in the axial direction of the main cylinder ,
To provide explosion-proof properties for discharged substances moving in the main cylinder
Inert gas nozzle for supplying a moving inert gas
A drilling suction nozzle characterized by being provided through a cylindrical wall of a main cylindrical body . 3. A main cylinder having one or more high-pressure water jet nozzles and one or more fluid pressure cylinders disposed on an outer periphery thereof, and a sub-cylinder having a plurality of excavating claws fixed to a tip thereof. Consisting of
The sub-cylinder is externally or internally inserted in the main cylinder, and is engaged with a tip of the fluid pressure cylinder,
The sub cylinder is configured to be slidable in the axial direction of the main cylinder ,
In addition, lubrication is applied to the objects moving in the main cylinder.
A lubricant nozzle for supplying lubricant
It is provided through the cylinder wall of the cylinder, and further moved inside the main cylinder.
Inert gas that promotes explosion proofing for moving waste
The inert gas nozzle to supply the
A drilling suction nozzle characterized by being provided therethrough . 4. A vibration generating device is provided on the side of the sub-cylinder in series with the fluid pressure cylinder, and the sub-cylinder and the excavating claw protruding from the tip thereof can be vibrated in the axial direction. Item 1
4. The excavation suction nozzle according to any one of items 1 to 3.