JPH0642009A - Mud pressure ship - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a mud pumping vessel that can accept mud collected in a large-capacity grab bucket, eliminate foreign matter contained in mud, and continuously convey air to a remote destination. To do. [Configuration] Hopper 300 for receiving mud and hopper 30
0 A ramp 400 that is connected to the lower outlet and transfers the mud
, A fixed bar screen 500 erected at the lower end of the slope 400, a mud tank 600, a screw type pumping device 700 for pumping the mud in the mud tank 600, and crushing the mud in the slope 400 and removing foreign matter. Backhoe to remove 800
In the mud pressure feeding ship 100, the screw type pressure feeding device 700 is configured to include a vertical screw conveyor, a pressure feeding pump, and a discharge pipe having an air nozzle for pressure injection.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention, for example, after dredging soft mud and mud such as sludge accumulated at the intake of a power plant, the seabed, lakes, rivers, ports, etc., and then accepting these to remove foreign substances. The present invention relates to a mud pressure ship that carries air by a discharge pipe.

[0002]

2. Description of the Related Art Dredging of mud and mud (hereinafter referred to as mud) such as sludge deposited on the seabed or rivers has conventionally been performed by plunging an underwater pump into the mud layer or sucking it up from the seabed using a grab bucket. It was done by doing. Among them, the method using the grab bucket is, for example, as shown in FIG. 6, the mud sampled by the grab boat equipped with the grab bucket is transferred to the earth carrier, and the tug boat is used to tow the earth carrier to the quay for permanent installation on the quay. The crawler type clamshell was used to transfer to the small hopper, and the mud stored in the small hopper was pipe-transferred to a remote location by a screw type pressure feeding device. Further, as an alternative method, as shown in FIG. 7, a method in which a screw type pressure feeding device loaded on a crawler is directly thrust into an earth-moving ship laterally attached to the quay to carry air is also used.

[0003]

In any of the above-mentioned dredging and transfer methods using the grab boat and earthmoving ship, it is necessary to tug the earthmoving ship by a tugboat between the dredging point and the quay in any case. In addition, it takes time to lift the mud on the quay, resulting in poor work efficiency and high transportation costs. Therefore, in order to improve these points, for example, as shown in FIG. 8, a grab ship is equipped with a hopper and a screw type pressure feeding device, the mud sampled by a grab bucket is put into the hopper, and these are fed by the screw type pressure feeding device. The device used was to transport via a discharge pipe to the quay or destination. However, the amount of processing in this case is small such that the capacity of the grab bucket is 2 to ³ m ³ , and the amount of input to the hopper by one grab bucket is, for example, about 10 to 20 m ^3. If the capacity is large, it is impossible to use a foreign matter sorter such as a vibrating grizzle or a vibrating sieve, so there is a limit to the large-scale processing, and it was impossible to adopt such a mud direct delivery system. .

[0004]

[Means for Solving the Problems] In order to solve the above-mentioned problems, in a mud pressure ship of the present invention, a hopper for receiving the mud sampled by a grab bucket or the like and an outlet at the bottom of the hopper are connected. And a ramp for transferring the mud,
A fixed bar screen erected at the lower end of the slope, a mud tank for storing mud after passing through the fixed bar screen,
A mud pressure-feeding device equipped with a screw-type pressure-feeding device for pressure-feeding the mud in the mud tank and a backhoe for crushing the mud in the slope and removing foreign matter contained in the mud, wherein the screw-type pressure-feeding device is a vertical shaft. The mold screw conveyor, the pressure pump, and the discharge pipe having the air nozzle for filling the compressed air are provided.

[0005]

In the mud pumping ship of the present invention, a large amount of mud collected by a grab ship or an attached grab bucket is received by the hopper, and the mud flows on the slope of the bottom of the hopper and the slope connected to it and passes through the fixed bar screen. It is stored in the mud tank. When the mud flowing down is highly viscous and difficult to flow down, or when foreign matter unsuitable for pipe transportation is mixed in the mud, scrape it toward the fixed bar screen with the built-in backhoe or scoop it to remove it. . On the other hand, the mud stored in the mud tank is transferred by a screw type pressure feed device and sent to a remote location after the quay by air transfer via a discharge pipe.

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 to 5 relate to an embodiment of the present invention,
Fig. 1 is an overall side sectional view of a mud pressure feeding ship, Fig. 2 is a front view of a mud pressure feeding ship, Fig. 3 is an entire side sectional view of a mud pressure feeding ship showing another embodiment, and Fig. 4 is a mud soil showing another embodiment. FIG. 5 is a front view of the pumping ship, and FIG. 5 is an overall vertical sectional view of the screw type pumping device.

In the figure, 100 is a mud pressure ship, 200
Is a grab bucket, 300 is a hopper, 400 is an oblique road, 5
00 is a fixed bar screen, 600 is a mud tank, 700 is a screw type pressure feeding device, and 800 is a backhoe. Figure 1
In the embodiment, the bottom surface of the hopper 300 is a unidirectional inclined surface (inclination angle about 30 °), and the inclination angle 1
A fixed bar screen 50 connected to an inclined road of about 5 ° to 20 ° and forested at the end of the inclined road in parallel with the vertical direction at equal pitches.
0 is fixed. Further, a mud tank 600 is connected in front of the fixed bar screen 500. Hopper 300 is
For example, it is designed to be large in size so that it can directly receive the mud by a grab dredger having a large grab bucket with a capacity of 13 m ³ , 16 m ³ , and 20 m ³ . further,
The mud tank 600, as shown in FIG.
Keep it as large as the capacity of ³ . Therefore, the screw-type pressure-feeding device 700 for charging the mud tank 600 to suck up the mud can be wound up by a winch device so that it can be inverted about 90 ° for inspection and maintenance. It is configured to be able to reciprocate in the orthogonal direction. The backhoe 800 is of a self-propelled type that can be swung and lifted up and down, and is used for scraping mud on the slope 400 from the deck and removing foreign matter.

FIGS. 3 and 4 show another embodiment of the present invention. The difference from those of FIGS. 1 and 2 is that the inclined surface of the hopper 300 and the slope 400 are the same, and a fixed bar screen is used. The point 500 is not vertical but is attached at a slight inclination. Further, another point is that a scraping paddle 610 for swirling around the horizontal axis and scraping the mud to the screw type pressure feeding device is provided in the mud tank 600.

Next, details of the screw type pressure feeding device 700 will be described. FIG. 5 shows an embodiment of a screw type pressure feeding device 700, in which 2 is a vertical screw conveyor and 2 is a vertical screw conveyor.
A is a casing, 2a is a discharge port, 3 is a screw blade, 3
a is a rotating shaft, 3b is an electric motor for driving a screw, 4 is a casing of an inlet device, 5 is an inlet device, 5a is an inlet cylinder, 5b is an inlet cutter, 6 is a bearing,
7 is a girth gear, 8 is a pinion gear, 9 is an electric motor, 10
Is a protective cover.

As shown in the figure, the vertical screw conveyor 2
Has a cylindrical casing 2A and a screw rotating shaft 3a housed in the casing 2A and driven to rotate by an electric motor 3b at the top, and a screw blade 3, and the screw blade 3 removes dirt. The mud is lifted and discharged from the upper discharge port 2a.

On the other hand, below the casing 2A of the vertical screw conveyor 2, a casing 4 of an inlet device 5 which rotates concentrically and with the same diameter as the casing 2A is suspended via a bearing 6, and an electric motor 9 and a pinion are provided. It can be rotationally driven via the gear 8 and the girth gear 7. At the lower end of the casing 4, a plurality of inlet cutters 5b, each having a B-shaped plan view, are attached to an inlet cylinder 5a having a large opening on its side surface. The inlet / cutter 5b is formed in a circular saw-tooth shape so as to shear the mud layer located on the outer periphery by rotation. The inlet cutter 5b also serves to remove large foreign matter so as not to enter the vertical screw conveyor 2.

At the discharge port 2a of the vertical screw conveyor 2, a straight pipe 20, an elbow pipe 21, an electromagnetic flow meter 22, a straight pipe 23,
Check valve 24, pressure pump 25, discharge pipe 26 are connected,
An air pipe 27 is provided at a position near the pressure pump 25 of the discharge pipe 26.
Air nozzle 2 for injecting compressed air supplied by a
7 are provided. As shown in FIG. 5, it is preferable that the pressure feed pump 25 is provided at a position lower than the discharge port 2a, and the air nozzle 27 is provided as close as possible to the discharge port of the pressure feed pump 25. Therefore, the check valve 24 is arranged not on the discharge side of the pressure pump 25 but on the suction side. The electromagnetic flow meter 22 measures the flow rate by detecting the velocity of a transported object that crosses the magnetic field applied to the flow meter.

The operation of the mud pressure feeding ship 100 of the present invention constructed as above will be described. Grab ship with large capacity grab bucket or mud pumping vessel 100 of the present invention
The mud collected by the grab bucket 200 installed in the hopper is supplied to the hopper 300, and the bottom slope and the slope 4 of the hopper 300 are supplied.
Flow down 00. The foreign matters contained in the flowing mud cannot pass through the fixed bar screen 500 and stay there. At this time, the backhoe 800 is operated to scoop and remove these foreign matters. In addition, the backhoe 800 is also used when the relatively hard mud having no fluidity is swept up while pouring water toward the fixed bar screen 500 from the inclined surface of the hopper and the slope 400. The soil that has passed through the fixed bar screen 500 is stored in the mud tank 600, and then driven by the screw-type pressure feeding device 700 to lay a discharge pipe (mud pipe) between the mud pressure feeding ship 100 and the quay and to a remote destination. It is transported via air.

The mud pressure-feeding ship 100 of the present invention is 10 to 20.
Since the dredged mud can be directly received and pumped by a large-capacity grab bucket of about m ³ , the transportation cost can be reduced. In other words, compared with the conventional transportation method by the earth carrier, not only the transportation cost of the earth carrier can be eliminated, but also the operation of pumping mud on the quay is unnecessary.

[0015]

As described above, the mud pumping ship of the present invention can be directly transported by a large grab dredger, and can safely and securely remove mud from which foreign substances such as rocks and metal objects that obstruct air transportation are removed. By continuous operation, it can be transported to remote destinations at low transportation cost. In addition, since continuous treatment is possible, dredging efficiency is greatly improved.

[Brief description of drawings]

FIG. 1 is an overall side sectional view of a mud pressure ship according to an embodiment of the present invention.

FIG. 2 is a front view of a mud pressure-feeding ship according to an embodiment of the present invention.

FIG. 3 is an overall side sectional view of a mud pressure ship according to another embodiment of the present invention.

FIG. 4 is a front view of a mud pressure ship according to another embodiment of the present invention.

FIG. 5 is an overall vertical sectional view of a screw type pressure feeding device according to an embodiment of the present invention.

FIG. 6 is a schematic explanatory diagram of a conventional dredging / transporting system.

FIG. 7 is a schematic explanatory view of another conventional dredging / rolling system.

FIG. 8 is a schematic explanatory view of another conventional dredging / transporting system.

[Explanation of symbols] 2 Vertical screw conveyor 2A Casing 2a Discharge port 3 Screw blade 3a Rotating shaft 3b Electric motor 4 Casing 5 Inlet device 5a Inlet cylinder 5b Inlet cutter 6 Bearing 7 Girth gear 8 Pinion gear 9 Electric motor 10 Protective cover 100 Mud pressure Ship 200 Grab bucket 300 Hopper 400 Diagonal road 500 Fixed bar screen 600 Mud tank 610 Rubbing paddle 700 Screw type pumping device 800 Backhoe

Claims (1)

[Claims] 1. A hopper for receiving the mud sampled by a grab bucket or the like, a slope for connecting the mud that is connected to an outlet at the bottom of the hopper, and a fixed bar screen standing upright at the lower end of the slope. A mud tank for storing the mud after passing through the fixed bar screen, a screw type pumping device for pumping the mud in the mud tank, and a backhoe for crushing the mud in the oblique path and removing foreign matter contained in the mud A mud pressure feeding device, wherein the screw type pressure feeding device comprises a vertical screw conveyor, a pressure feeding pump, and a discharge pipe having an air nozzle for enclosing compressed air.