JPH0510449B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a suction head device for sludge dredging that can be used to dredge sludge at a high sludge content using a sludge dredger.

[Prior art]

Conventionally, when dredging sludge on the seabed, as shown in FIG. While swinging the hull around a spud 4 driven into the seabed, the suction head 3 pumps up sludge 5 through a suction pipe 7 combined with a pump 6 on the sludge dredger 1. As shown in the perspective view of FIG. 4 and the front sectional view of FIG. It is provided along the opening 3A provided at the bottom of the.

On the other hand, in seabed sludge dredging work, the key point is how to dredge seabed sludge 5 in a state as close to its original form as possible, that is, with a high sludge content with little moisture. In the suction head 3, since there is a distance between scraping up the sludge 5 and introducing it into the suction pipe 7 attached to the upper part of the main body of the suction head 3, the sludge 5 is diluted with seawater and the inlet of the suction pipe 7 is closed to the sludge. There is also a risk of being blocked by 5.

[Purpose of the invention]

Therefore, the present invention was made to solve the above-mentioned conventional problems, and the sludge scraped up by a rotating body with screw blades provided at the opening of the suction head is immediately sucked up by the rotating body. The purpose is to carry out dredging with a high mud content.

[Structure of the invention]

That is, in the suction head device for sludge dredging of the present invention, in the suction head for sludge dredging,
A suction port is provided in the center of a hollow rotating body that has screw blades on the outside that scrape up sludge from the left and right sides, and a suction pipe is installed in the extending direction of the hollow rotating body, and a suction pipe is installed inside the suction port of the hollow rotating body. It consists of a suction head device for dredging sludge, which is equipped with a funnel-shaped guide pipe housed toward the side, and introduces sludge from the suction port into the hollow rotating body toward the suction pipe side for dredging.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. The suction head device of this embodiment shown in the perspective view in Fig. 1 and the front sectional view in Fig. 2 is different from the conventional suction head device shown in Fig. 3. Similarly, rudder 2 of sludge dredger 1
A rotating body 10, which is driven by an underwater motor 8 through a chain 11, is installed along the opening 3A provided at the bottom of the main body, and a rotary body 10 is installed on the outer circumference of the rotating body 10. Since the screw blades 9 are provided symmetrically across the suction port, the sludge 5 can be collected at the center of the rotating body 10.

Next, this rotating body 10 is formed into a cylindrical body whose right end communicates with the suction pipe 7 combined with the pump 6 on the sludge dredger 1, as in the conventional example shown in FIG. As shown in FIG. 2, a plurality of suction ports 12 for the sludge 5 are provided on the outer periphery of the sludge 5, and a funnel-shaped guide pipe 14 is provided inside the suction port 12 toward the suction pipe 7 side. The sludge 5 collected in the center is sucked in by the suction port 12, guided by the outer peripheral surface of a funnel-shaped guide tube 14, and introduced into the suction tube 7.

In this embodiment, as described above, the sludge 5 enters the rotating body 10 through the suction port 12 in the center of the rotating body 10, is guided by the outer peripheral surface of the guide tube 14, and flows in the right direction. This is because the funnel-shaped guide tube 14 attached to the right side of the left rotating body 10 is fitted inside the rotating body 10 on the right side in FIG.
This is because the sludge 5 is not carried to the left from the center of the pipe, but is carried from the suction port 12 toward the suction pipe 7.

〔Effect of the invention〕

Therefore, if the suction head device for sludge dredging of the present invention having the above-mentioned configuration is adopted in a sludge dredging vessel, the suction port will be located low and close to the seabed ground, making it possible to suction high sludge content. Since the suction port is integrated with the rotating body equipped with screw blades, the sludge scraped up by the screw blades is immediately sucked in and pumped up via the suction pipe 7, making it possible to suction even higher sludge content. It has the effect of becoming

Furthermore, since the suction port is constantly rotating, there is an effect that the vicinity of the entrance of the suction port will not be blocked by sludge.

Furthermore, once the sludge enters the hollow rotating body from the suction port, the inside of the hollow rotating body also serves as a passage for the sludge, so that the sludge can be transferred smoothly. In addition, the sludge collected by the screw blades of the hollow rotating body can be transferred to the outside of the suction head through the existing hollow rotating body, making it unnecessary to separately install a suction pipe above the suction head as in the past. In addition to the problem of sludge clogging at the confluence point where the sludge is introduced into a separate suction pipe from the confluence point, which is collected from the left and right to one central location using screw blades, as in the past. This does not occur in the present invention, and the sludge can be discharged straight from the suction port in an extended line in the direction in which it entered the hollow rotating body, so sludge clogging does not occur and the sludge can be transferred smoothly.

As described above, while in the past the sludge collected from the left and right sides by the screw blades is transferred to the suction pipe provided above, the present invention transfers the sludge collected from the left and right sides by the screw blades to the suction pipe installed above the screw blades. The sludge can be introduced from the suction port into the hollow rotating body installed in the sludge, and transferred along the transfer direction, which not only allows for smooth sludge transfer, but also allows the use of existing hollow rotating bodies, making it inexpensive to manufacture. It can be done.

To summarize the above effects of the present invention, A. Since a hollow rotating body having screw blades on the outside for scraping sludge from the left and right sides is used, it is possible to perform both the functions of scraping sludge and sucking and transporting sludge. There is no need to separately provide screw blades for raking sludge from left and right sides and a suction pipe for suctioning and transporting sludge. In other words, since a hollow rotating body with screw blades on the outside is used, it can simultaneously fulfill the two roles of scraping and suctioning sludge.

B A suction port is provided in the center of the hollow rotating body, and a funnel-shaped guide tube is provided inside the suction port toward the suction pipe, so the hollow rotating body can be extended from the suction port using the outside of the guide tube as a guide. Since sludge is introduced in the direction of the suction pipe, the sludge is inevitably transferred in the direction of the suction pipe, and the suction force of the sludge can be used effectively, improving sludge transfer efficiency. can do.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a suction head device according to an embodiment of the present invention, Fig. 2 is a front sectional view of Fig. 1, Fig. 3 is a layout diagram of a conventional sludge dredger, and Fig. 4 is the suction head of Fig. 3. Perspective view of the device, fifth
The figure is a front sectional view of FIG. 4. 1... Sludge dredger, 3... Suction head,
3A...Opening, 5...Sludge, 6...Pump, 7
... Suction pipe, 8 ... Submersible motor, 9 ... Screw blade, 10 ... Rotating body, 12 ... Suction port, 14 ...
...Guide tube.

Claims (1)

[Claims] 1. In a suction head for sludge dredging, a suction port is provided in the center of a hollow rotating body that has screw blades on the outside that scrape up sludge from the left and right sides, and a suction pipe is attached in the extending direction of the hollow rotating body. A funnel-shaped guide pipe is installed inside the suction port of the body and is housed toward the suction pipe side, and is used for sludge dredging by introducing sludge from the suction port into the hollow rotating body toward the suction pipe side. Suction head device.