JP2584071Y2 - High concentration dredging equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-concentration dredging apparatus, and more particularly to a high-concentration dredging apparatus for dredging mud such as sludge deposited on the bottom of a seabed or a lake at a high concentration.

[0002]

2. Description of the Related Art Recently, in order to improve the environment of the ocean and lakes, dredging and removal of deposits such as sludge deposited on the bottom are increasing. In this dredging method, a method of enclosing a dredging point with an outer shell has been proposed in order to perform dredging with high efficiency without polluting a water area near the dredging. For example, as shown in FIGS. 4 and 5, a dredging device 4 surrounded by an outer shell 3 is arranged at the tip of an arm 2 provided on a dredger 1, and the outer shell 3 of the dredging device 4 An opening 4a is formed, and both side walls 5a and 5b and a lower edge of the rear side wall 6 are all grounded to the water bottom. This outer shell 3
Inside, a stirrer 8 operated by a motor 7 and a suction port 10 of a displacement type pump 9 are provided. The mud D stirred by the stirring device 8 is collected by the dredger 1 from the suction port 10.

Accordingly, since the mud D stirred by the stirring device 8 is surrounded by the outer shell 3, the dredging efficiency can be enhanced because the surrounding water area can be dredged at a high concentration without being polluted.

[0004]

However, there is a problem in the dredging device 4 as described above. That is, a gas often stays in the mud D to be dredged by the dredging device 4. When the mud D is stirred by the stirring device 8, the gas is discharged into the outer shell 3 to be discharged. Shell 3
As a result, the contaminated water existing in the outer shell 3 spills out to pollute the water area near the dredging point.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has an opening in the front and the lower edges of both side walls and the rear wall are grounded. It is an object of the present invention to provide a high-concentration dredging device in which a stirrer and a suction port of a suction device are arranged in an outer shell, and a gas discharge pipe opening in an upper part of the outer shell.

[0006]

[Operation] In the high-concentration dredging device with this configuration,
When the gas in the mud expands due to being stirred by the stirring device in the outer shell, the gas is released from the outer shell through the gas vent tube, and as a result, polluted water in the outer shell is released to the outer shell. It can be dredged without being done.

[0007]

[Embodiment] An embodiment of a high-concentration dredging device according to the present invention will be described below with reference to FIGS. Figure 1 shows dredging device 2
0 is a schematic side cross-sectional view of the dredging apparatus 20. The dredging apparatus 20 has an opening 21 at the front and has both side wall surfaces and rear wall surfaces 22.
A stirrer 26 operated by a motor 25 and a suction port 28 for sucking muddy water d by a positive displacement pump 27 (suction unit) are arranged in an outer shell 24 grounded to the water bottom 23 and above the stirrer 26. Stirring chamber 24a located at
The opening 29 of the gas discharge tube 30 is arranged on the ceiling surface inside.

In this embodiment, the constant-capacity pump 27 is used as a suction device, but another type of device may be used. The gas discharge pipe 3
In the vicinity of 0, a mud level detector 31 is provided for operating the dredging device 20 on the mud D surface, and further, sounding gauges 32a and 32b are arranged on the outer shell 24. Stirrer 2
A strainer 33 is arranged behind the tube 6, and an inlet 28 is arranged in the direction of the strainer 33. Accordingly, the muddy water d after the gas is discharged to the muddy soil D is pumped by the pump 2.
At 7, suction is performed.

Next, a method of operating the dredging device 20 having the above-described configuration will be described. When the motor 25 of the dredging device 20 was driven to activate the stirring device 26 and the pump 27 was further activated, the mud D entering the inside from the opening 21 in front of the outer shell 24 was stirred and fluidized by the stirring device 26. The mud d is sucked from the suction port 28 through the strainer 33 by the negative pressure of the pump 27, and
4 and is collected by a dredger (not shown).

When the gas is accumulated in the mud D when the gas G is stirred by the stirring device 26, the gas G is separated in the stirring chamber 24a at the upper part of the stirring device 26, and the gas G is separated from the opening 29 of the stirring chamber 24a. The gas is discharged outside through the gas discharge tube 30. FIG. 2 shows another embodiment, in which an outer shell 2 is shown.
The upper plate 35 forming the stirring chamber 24a disposed in the inside 4 is formed in an inverted funnel shape. In this case, the gas G in the outer shell 24 is collected along the upper plate 35 and easily released. Tube 3
It can be released from zero.

FIG. 3 shows still another embodiment, in which an ignition device 36 is provided at the upper end of a gas discharge tube 30. Preferably, the ignition device 36 is provided with a gas detector (not shown). It is configured to be activated by a signal. In this case, the gas G discharged from the gas discharge pipe 30 is burned, and thus has an effect of deodorization and detoxification.

[0012]

As is apparent from the above description, according to the high concentration dredging device 20 of the present invention, the gas in the outer shell 24 can be discharged from the gas discharge pipe 30 to the outside, so that There is an effect that the polluted water does not spout to the outside, and therefore the water area near the dredging point is not polluted.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a high-concentration dredging device according to an embodiment of the present invention.

FIG. 2 is a schematic sectional view of a high-concentration dredging device according to another embodiment.

FIG. 3 is a schematic sectional view of a high-concentration dredging device according to still another embodiment.

FIG. 4 is an explanatory view of use of a conventional dredging device.

FIG. 5 is a schematic sectional view of a conventional dredging device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Dredge 2 Arm 3 and 24 Outer shell 4 and 20 Dredging device 5a, 5b Side wall surface 6,22 Rear side wall surface 7,25 Motor 8,26 Stirrer 9,27 Pump 10,28 Suction port 21,29 Opening 23 Water bottom 30 Gas discharge pipe 31 Mud level detector 32a, 32b Sounding meter 33 Strainer 34 Lifting pipe 35 Upper plate 36 Ignition device

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E02F 3/88 E02F 7/00

Claims (1)

(57) [Scope of request for utility model registration] 1. A stirring device and a suction port of a suction device are arranged in an outer shell having an opening in the front and configured such that lower edges of both side walls and a rear wall are grounded. A high-concentration dredging device comprising an open gas discharge pipe.