JPH0649635Y2 - Dredging device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a dredging device, and in particular to a dredging device provided with a dredging inlet for facilitating the uptake of dredging material at the tip of a vertical screw conveyor. Regarding improvement.

[Prior Art] Conventionally, in the case of dredging sludge such as sludge accumulated on the seabed, a method of using a screw conveyor having a dredged material inlet at its tip is known. As shown in FIG. 4, the dredging device used in this method has a concentric rotary cylinder 3 attached to the outer circumference of an outer tube 2 of a vertical screw conveyor 1, and the tip of the rotary cylinder 3 for scraping. An inlet 5 having the bucket blade 4 is continuously provided, and the bucket blade 4 is rotated around the tip of the outer tube 2 of the screw conveyor 1. In this case, the outer tube 2 that covers the screw 6 is
Is extended to the tip of and the side surface is partially opened to serve as a mud water intake port 7. The rotary cylinder 3 is connected to the inlet 5 immediately above the intake port 7 of the outer tube 2, and the inlet 5 covers the distal end of the outer tube 2 including the intake port 7 so that the rotary cylinder 3 is driven to move the screw 6 to the screw 6. It is designed to rotate in the same direction.

[Problems to be solved by the device]

By the way, in the dredging device as described above, a large amount of foreign matter may be mixed in the dredged material to be lifted up, and this may be caught between the screw 6 and the outer tube 2, which is taken in by the screw conveyor 1. Frequent occurrence near the mouth 7. However, in the above-mentioned conventional dredging device, the inlet 5, the rotary cylinder 3 for rotating the inlet 5, and the screw conveyor 1 are used.
The outer tube 2 and the outer tube 2 have a double tube structure, and it has been very difficult to perform the recovery work and the maintenance work when a foreign matter is caught.

The present invention focuses on the above-mentioned conventional problems, and is a dredging device equipped with a vertical screw conveyor and a dredged material inlet that is rotated at the tip of the vertical screw conveyor. It is an object of the present invention to provide a dredging device having a structure that can be easily performed.

[Means for Solving the Problems]

In order to achieve the above object, the dredging device according to the present invention comprises:
A vertical screw conveyor having a screw and a jacket tube containing the screw, and a dredged material inlet connected to a rotary cylinder that is attached to the tip side of the vertical screw conveyor and is driven to rotate at the outer circumference of the jacket tube. In the dredging device provided, the tip of the rotary cylinder of the dredged material inlet is replaced by the mantle tube, and the tip of the screw is directly surrounded.

[Action]

According to the above configuration, the rotary cylinder that rotates the dredged material inlet also serves as the outer tube of the screw conveyor, and directly surrounds the tip of the screw. Therefore, the rotary cylinder itself can form the intake port for dredged material, and even when foreign matter is easily bitten into the screw,
The biting portion has a structure generated inside the rotary cylinder that rotates the inlet. Therefore, by disposing the lid for inspection on the rotary cylinder, it is not necessary to disassemble it specially, and the foreign matter removing operation becomes very simple.

〔Example〕

Hereinafter, specific embodiments of the dredging device according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a cross-sectional view of a dredging device according to an embodiment. As shown in this figure, the dredging device has a vertical screw conveyor 10, which is provided with a cylindrical outer tube 12 and a screw 14 housed and rotated inside the outer tube 12. Has become. The vertical screw conveyor (10) has its tip immersed in a layer of soft mud to be dredged, and the rotation of the screw (14) lifts the dredged material through the outer tube (12). Such a vertical screw conveyor 10 is provided with a dredged material inlet 16 at its tip, which is different from the rotation direction of the screw 14 by a rotary cylinder 18 attached so as to rotate the outer circumference of the outer tube 12. It is designed to be rotated in the opposite direction.

Here, the vertical screw conveyor 10 is formed so that the outer tube 12 covers the upper 3/4 of the length of the screw 14, and approximately 1/4 of the tip of the screw 14 projects from the outer tube 12. Has become. The rotary cylinder 18 is extended so as to directly surround the tip end of the screw 14 protruding from the outer tube 12 while leaving the recessed portion during dredging, and the dredged material inlet 16 connected to the tip of the rotary cylinder 18 is screwed. It is constructed so as to directly surround the sunk part of the soft mud layer at the time of dredging, which is the most advanced part of 14. That is, the rotary cylinder 18 has a structure in which three cylindrical tubes are joined, and firstly, the rotary cylinder 18 has a first rotary cylinder 18A concentrically attached to the outer circumference of the outer jacket tube 12 and having a larger diameter than the outer jacket tube 12. Then, a second rotary cylinder 18B is connected to the tip of the main rotary cylinder 18A by flange coupling and covers the range up to the tip edge of the outer jacket tube 12, and particularly the outer jacket tube 12 is connected to this.
A gland packing 20 for sealing water is interposed between and. Further, a third rotary cylinder 18C which is flange-coupled to the distal end of the second rotary cylinder 18B and has the same diameter dimension as the outer jacket tube 12 and directly surrounds the distal end portion of the screw 14 in place of the outer jacket tube 12 is connected. . This third rotary cylinder 18C has a tip opening as a dredged material intake port 22, guides the dredged material by the screw 14 to the tip opening of the mantle tube 12, and connects the dredged material inlet 16 to the intake port 22. . In this case, a plurality of inspection lids 2 are provided on the peripheral surface of the second rotary cylinder 18B.
4 is provided so that it can be opened during removal work or maintenance work when foreign matter is caught.

The dredged material inlet 16 has a cone type upper frame 26 flange-connected to the intake 22 of the third rotary cylinder 18C, and a bucket blade 28 arranged so as to surround the screw 14 is attached to the lower surface thereof to rotate the rotary cylinder 18. Along with this, the screw 14 is rotated around and the soft mud is scraped into the screw 14 side. A guard ring 30 is attached to the outer periphery of the bucket blade 28 to prevent large foreign matter from being introduced.

The operation of such a dredging device is as follows. The dredged material inlet 16 provided at the most distal end of the screw 14 is immersed in the soft mud layer, and the rotary cylinder 18 is rotationally driven at the same time as the vertical screw conveyor 10 is driven. At this time, the rotary cylinder 18 is rotated in the direction opposite to the rotation direction of the screw 14. The soft mud is scraped to the screw 14 side by the dredged material inlet 16, and is introduced into the mantle tube 12 of the vertical screw conveyor 10 through the third rotating cylinder 18C forming the intake port 22 by the rotation of the screw 14, and the mantle tube. It is transported upward in the inside of 12. At this time, since the third rotary cylinder 18C forms a part of the outer tube 12 and forms the intake port 22, if foreign matter is mixed in, the third rotary cylinder 18C and the screw 14 surrounded by the third rotary cylinder 18C will be described. Biting occurs between them. In such a case, the dredging device can be pulled up and the inspection lid 24 can be opened to easily remove the dredging device. Therefore, the dredging work can be continued, and large-scale restoration work such as disassembling the dredging device is unnecessary. If it cannot be removed from the inspection lid 24, the third rotary cylinder 18C
This can be done by removing at least the first rotary cylinder 18A and the second rotary cylinder 18B attached to the vertical screw conveyor 10, and the simplification of the work is significantly improved.

As described above, in this embodiment, a part of the rotary cylinder 18 connected to the dredged matter inlet 16 is replaced with the outer tube 12 so that the screw 14 front end side of the vertical screw conveyor 10 is directly surrounded. When foreign matter is caught and clogged, it can be easily removed by the screw 14 surrounding portion of the rotary cylinder 18, and there is an effect that quick recovery work and simplification of maintenance can be realized.
Further, since the screw 14 and the rotary cylinder 18 are configured to rotate in opposite directions, there is an advantage that the relative rotation speed of the screw 14 is increased and an additional effect of improving dredging capability is obtained.

(Effect of the Invention) As described above, according to the present invention, since the tip of the rotary cylinder of the dredged material inlet is replaced with the outer tube and the tip of the screw is directly surrounded, It is possible to simplify the recovery work at the time of biting and the normal maintenance and inspection work, and it is possible to obtain the effect of improving workability.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main part of a dredging device according to an embodiment, FIG. 2 is a cross-sectional view of a dredged material inlet part, FIG. 3 is a side view of the same, and FIG.
The figure is a cross-sectional view of a conventional dredging device. 10 …… Vertical screw conveyor, 12 …… Outer tube, 14 ……
Screw, 16 ... Dredging inlet, 18 ... Rotating cylinder, 18
A: 1st rotating cylinder, 18B: 2nd rotating cylinder, 18C: 3rd rotating cylinder.

Claims (1)

[Scope of utility model registration request] 1. A vertical screw conveyor having a screw and an outer tube containing the screw, and a rotary cylinder attached to the front end of the vertical screw conveyor and rotationally driven on the outer circumference of the outer tube. A dredging device comprising a dredge inlet, wherein the tip of the rotary cylinder of the dredge inlet is replaced with the mantle tube to directly surround the tip of the screw.