Amphibious dredger

Abstract

To solve a technical problem that, when dredging in soft ground such as icy water areas or wetlands, efficiency of dredging work decreases due to a significant decrease in running performance when using conventional ship-type dredgers, and to provide an amphibious dredger that combines excellent running performance and high propulsive force and enables stable dredging work.SOLUTION: An amphibious dredger comprises first and second cylindrical floats at a bottom of a machine body that can rotate independently around a longitudinal axis center. Each float has a blade with a spiral structure. The spiral structure has a pitch equal to that of the first and second floats. At both ends of each float, there are provided a power portion that rotates the float, a protective portion configured to surround the power portion, and a connection portion that can freely rotate around an axis center perpendicular to an upper plane of the machine body. The connection portion has a screw structure.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an amphibious dredger. [Background technology]

[0002] For dredging work, work vessels called dredgers are used, such as grab dredgers equipped with grab buckets and backhoe dredgers equipped with backhoes. Furthermore, amphibious dredgers must be used when dredging soil and sludge (removing it from areas other than shorelines and coastlines) in icy water areas, in wetlands, on soft ground, underwater, and when land subsidence or flooding occurs due to liquefaction caused by heavy rain or earthquakes. Conventionally, work has been carried out using ship-type or crawler-type dredgers. However, for example, with an amphibious crawler-type dredger with caterpillar tracks, the moving speed on the water is extremely slow, and the dredging work is The problem is that the efficiency drops significantly.

[0003] To solve this problem, dredgers with propellers on the wheels have been developed, but while this has improved the speed at which they can move on water, sludge makes them extremely difficult to move on soft ground such as in wetlands. This has not solved the problems of maintaining speed and durability, and improving work efficiency, on water and on soft ground.

[0004] In light of this situation, Patent Document 1 discloses an amphibious dredger having a bladed rotating float with spiral blades attached to the bottom of the grab device body. However, this only enables the dredger to move on water or in wetlands, and issues remain regarding the propulsion power and durability of each float, making it impossible to perform stable dredging work over long periods of time.

[0005] Furthermore, disasters have been increasing in recent years, and dredging work is becoming more common in soft ground such as wetlands when liquefaction occurs due to heavy rainfall, earthquakes, etc. However, dredging work in cold regions is not only limited to the soft ground mentioned above, but also to the fact that the soft ground freezes due to the drop in temperature, reducing propulsion power and reducing the durability of the aircraft due to propulsion. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Application Publication No. 59-129610 Summary of the Invention [Problem to be solved by the invention]

[0007] The amphibious dredger of the present invention is capable of performing dredging operations in a wide range of terrains, including cold areas such as snow, icy seas, and snowy areas, wetlands, and areas with subsidence or soft ground caused by liquefaction due to heavy rain or earthquakes.Furthermore, the amphibious dredger of the present invention has excellent driving characteristics and high propulsive force, and therefore the objective of the present invention is to provide an amphibious dredger that is ideal as a dredging machine that enables stable dredging operations. [Means for solving the problem]

[0008] The invention of claim 1 is an amphibious dredger comprising first and second cylindrical floats mounted on the bottom of the amphibious dredger's body and each of which can rotate independently around a longitudinal axis, the first float having a blade formed of a first spiral structure rotating clockwise as viewed from the rear of the body, and the second float having a blade formed of a second spiral structure rotating counterclockwise as viewed from the rear of the body, the first and second spiral structures being respectively formed by the first and second floats. and a power unit for rotating the first and second floats is provided at both ends of each of the first and second floats, the power unit is provided with a protective unit configured to surround the power unit, a connection unit is provided which is rotatable around an axis perpendicular to the upper plane of the body, the connection unit has an external thread structure, and a hydraulic excavator is connected to the connection unit, the hydraulic excavator having an internal thread structure.

[0009] The invention of claim 2 relates to an amphibious dredger as described in claim 1, characterized in that the first and second floats are positioned symmetrically about the longitudinal central axis of the body.

[0010] The invention of claim 3 relates to an amphibious dredger as described in claim 1, characterized in that the spiral structure is made of one or more materials selected from the group consisting of metals, alloys and synthetic metals.

[0011] The invention of claim 4 relates to the amphibious dredger as described in claim 1, characterized in that the first and second floats are configured along the longitudinal axis that passes through the center of the floats, respectively, and the power unit is configured so that the first and second floats and the shaft unit rotate integrally, and the shaft unit is connected to the power unit.

[0012] The invention of claim 5 relates to an amphibious dredger as described in any one of claims 1 to 4, characterized in that the blade consisting of the spiral structure is welded to the first and second floats, respectively.

[0013] The invention of claim 6 relates to an amphibious dredger as described in claim 1, characterized in that the connection part has an internal thread structure and the hydraulic excavator connected to the connection part has an external thread structure. Effect of the Invention

[0014] According to the amphibious dredger of claim 1, there is provided an amphibious dredger comprising first and second cylindrical floats provided at the bottom of the body of the amphibious dredger and capable of independently rotating about their longitudinal axes, the first float having blades formed of a first spiral structure rotating clockwise as viewed from the rear of the body, and the second float having blades formed of a second spiral structure rotating counterclockwise as viewed from the rear of the body, the first and second spiral structures being configured with a pitch equal to that of the first and second floats, respectively, and the first and second floats and A power unit for rotating the first and second floats is provided at both ends of each of the floats, and a protective unit configured to surround the power unit is provided on the power unit. A connection unit is provided which is freely rotatable around an axis perpendicular to the upper plane of the body, and the connection unit has an external thread structure. A hydraulic excavator is connected to the connection unit, and the hydraulic excavator has an internal thread structure. Therefore, the vehicle can exhibit excellent running performance on snow, in icy seas, in snowy and icy areas, wetlands, muddy areas, etc., and has the effect of enabling dredging work to be performed efficiently.

[0015] According to the amphibious dredger of claim 2, the first and second floats are positioned symmetrically about the longitudinal central axis of the body, thereby enabling the first and second floats to float stably even on snow, icy seas, snowy and icy areas, wetlands, muddy areas, etc., thereby achieving the advantageous effect of enabling dredging operations to be carried out safely.

[0016] According to the amphibious dredger of claim 3, the spiral structure is characterized in that it is made of one or more materials selected from the group consisting of metals, alloys and synthetic metals, and therefore has excellent durability and propulsive force, and has the advantageous effects of reducing wear due to ice and reducing a decrease in propulsive force when traveling on icy seas, and even preventing rust.

[0017] According to the amphibious dredger of claim 4, the first and second floats are configured along the longitudinal axis that passes through the center of the floats, respectively, and the power unit is configured so that the first and second floats rotate integrally with the shaft portion, and the shaft portion is connected to the power unit, thereby achieving the effect of efficiently transmitting energy from the power unit to each float portion through the shaft portion.

[0018] According to the amphibious dredger of claim 5, the blade having the spiral structure is welded to the first and second floats, respectively, and therefore has excellent durability. This provides the effect of forming a blade.

[0019] According to the amphibious dredger of claim 6, the connection part has an internal thread structure and the hydraulic excavator connected to the connection part has an external thread structure, thereby achieving the advantageous effect that the hydraulic excavator can be easily attached to the machine body and the hydraulic excavator can be used in a manner that allows it to rotate freely. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a side view of an amphibious dredger as viewed from the first float side, which is one embodiment of the amphibious dredger according to the present invention. [Diagram 2] FIG. 2 is a plan view showing an amphibious dredger according to one embodiment of the present invention, taken along the line AA of FIG. 1 as viewed from above. [Diagram 3]FIG. 1 is a side view of a first float seen from the first float side of an amphibious dredger, which is one embodiment of the amphibious dredger according to the present invention. [Figure 4] FIG. 2 is a side view of a blade of one embodiment of the amphibious dredger according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, an amphibious dredger according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0022] Here, the amphibious dredger is exemplified as being applicable to snow, icy seas, snowy and icy areas, wetlands, muddy areas, etc., but is not limited to these, and the amphibious dredger of the present invention can also be applied to rivers and estuaries, for example.

[0023] The metals, alloys and synthetic metals of the helical structure included in the present invention include iron, aluminum, aluminum alloys, cupro-nickel, steel, stainless steel and the like, but are not limited to any particular material.

[0024] <Amphibious dredger> FIG. 1 is a side view showing an amphibious dredger which is one embodiment of the amphibious dredger according to the present invention. 1 and 2, an amphibious dredger (1) according to an embodiment of the present invention is provided at the bottom of the body (2) of the amphibious dredger (1), and includes first and second cylindrical floats (4a, 4b) that can rotate independently around their longitudinal axes. The first float (4a) includes a blade made of a first spiral structure (5) that rotates clockwise when viewed from the rear of the body, and the second float (4b) includes a blade made of a second spiral structure (5) that rotates counterclockwise when viewed from the rear of the body (see the arrow in FIG. 2). The first and second spiral structures (5) are configured with a pitch (P) equal to that of the first and second floats (4a, 4b), respectively. Furthermore, a power unit (8) for rotating the first and second floats (4a, 4b) is provided at both ends of each of the first and second floats (4a, 4b). Furthermore, the power unit (8) is provided with a protective unit (6) configured to surround the power unit (8). In addition, a connection unit (9) is provided so as to be rotatable about a vertical axis (V) relative to the upper plane of the machine body (2). This connection unit (9) has an external thread structure, and a hydraulic excavator (3) is connected to the connection unit. The hydraulic excavator (3) forms an internal thread structure. The material used for the spiral structure (5) is as described above.

[0025] FIG. 2 is a plan view showing an amphibious dredger as viewed from above along the AA cross section of FIG. 1, which is one embodiment of the amphibious dredger according to the present invention. 1, 2, and 3, the first and second floats (4a, 4b) are positioned symmetrically with respect to the longitudinal central axis (L1) of the aircraft body (2). The first and second floats (4a, 4b) are configured along the longitudinal axis (L2) that passes through the center of each of the floats, and the power unit (8) is configured so that the first and second floats (4a, 4b) rotate integrally with the shaft unit (7). As a result, energy from the power unit (8) is efficiently transmitted to each float (4) through the shaft unit (7).

[0026] FIG. 3 shows an amphibious dredger float, which is one embodiment of the amphibious dredger according to the present invention. 1, 3 and 4, a blade (10) made of a helical structure (5) is welded to the first and second floats (4a, 4b), respectively. A connection part (9) between the machine body (2) and the hydraulic excavator (3) has an internal thread structure, and the hydraulic excavator (3) connected to the connection part (9) has an external thread structure. By welding the blade (10) made of the helical structure (5) to the float (4), a float (4) with excellent durability can be formed.

[0027] 3 and 4 are side views of the blade (10) which is one embodiment of the amphibious dredger according to the present invention. The blade (10) made of the spiral structure (5) may have a thickness of 6 mm to 12 mm, preferably 9 mm. The standard thickness of the blade (10) is 9 mm. The thickness of the blade (10) can also be appropriately changed depending on the location, such as on snow, in icy waters, in snowy and icy areas, or on soft ground such as wetlands. This thickness provides excellent propulsive force.

[0028] Although not shown in the figure, the power unit (8) uses a hydraulic motor, but the power unit (8) is not limited to this embodiment, and various modifications, alterations, and changes can be made within the scope of what is obvious to those skilled in the art. EXAMPLES

[0029] The amphibious dredger of the present invention will be described in more detail below with reference to examples, although the present invention is not limited to the following examples. An amphibious dredger was constructed with reference to an embodiment of the present invention.

[0030] Although not shown in the figures, referring to an embodiment of the present invention, the travel speed of the amphibious dredger on soft ground such as wetlands is approximately 1.08 (km / h). As such, the amphibious dredger according to the present invention can be operated at a certain speed or higher even on various types of terrain, and therefore has excellent propulsive force.

[0031] 3 and 4 and the embodiment of the present invention, the spacing per pitch (p1, p2, p3 and the following not shown) of the blades (10) is 0.6 m to 1.0 m, and the spacing per pitch (P) can be changed depending on the length and size of the float (4). Furthermore, the number of pitches (P) is not limited to this embodiment, and various modifications, corrections, and changes can be made within the scope of what is obvious to those skilled in the art.

[0032] Similarly, referring to Figs. 3 and 4 and the embodiment of the present invention, it is desirable that the blade (10) consisting of the helical structure (5) is formed to have a thickness of 6 mm to 12 mm, preferably 9 mm.

[0033] Similarly, referring to Figures 3 and 4 and the embodiment of the present invention, it is desirable that the pitch angle θ of the blade (10) consisting of the helical structure (5) is 20° to 40°. If the pitch angle θ is 20° to 40°, the propulsive force in water is unlikely to decrease, and the present invention can be stably propelled.

[0034] Here, the hydraulic excavator (3) used in the dredging work is a product called "SK135SR" manufactured by Kobelco Construction Machinery Co., Ltd. The hydraulic excavator (3) is not limited to this embodiment, and various modifications, alterations, and changes can be made within the scope obvious to those skilled in the art. [Industrial Applicability]

[0035] The amphibious dredger of the present invention is capable of performing dredging operations in a wide range of terrains, including cold areas such as snow, icy seas, and snowy areas, wetlands, and areas with subsidence or soft ground caused by liquefaction due to heavy rain or earthquakes.Furthermore, the amphibious dredger of the present invention combines excellent driving performance and high propulsive force, thereby providing an amphibious dredger that enables stable dredging operations. [Explanation of symbols]

[0036] 1. Amphibious Dredge 2. Aircraft 3. Hydraulic excavator 4. Float 4a 1st float 4b 2nd float 5 Spiral structure 6 Protective part 7 Shaft 8 Power section 9 Connection 10 Blades AA AA section L1 Longitudinal central axis L2 Float longitudinal axis Pitch p1 Pitch p2 pitch p3 pitch V vertical axis θ Pitch angle

Claims

1. An amphibious dredger comprising: The amphibious dredger includes first and second cylindrical floats provided on the bottom of the body of the amphibious dredger and capable of independently rotating about a longitudinal axis; The first float has a blade having a first spiral structure rotating clockwise when viewed from the rear of the aircraft, and the second float has a blade having a second spiral structure rotating counterclockwise when viewed from the rear of the aircraft, the first and second helical structures are configured with a pitch equal to the first and second floats, respectively; A power unit for rotating the first and second floats is provided at both ends of each of the first and second floats, The power unit is provided with a protective unit configured to surround the power unit, A connection portion is provided so as to be rotatable about an axis perpendicular to the upper plane of the fuselage, The connection portion has an external thread structure, A hydraulic excavator is connected to the connection part, and the hydraulic excavator has an internal thread structure. An amphibious dredger characterized by:

2. 2. An amphibious dredger as described in claim 1, wherein the first and second floats are positioned symmetrically with respect to a central axis in a longitudinal direction of the body.

3. 2. The amphibious dredger according to claim 1, wherein the spiral structure is made of at least one material selected from the group consisting of metals, alloys and synthetic metals.

4. An amphibious dredger as described in claim 1, characterized in that the first and second floats are configured along the longitudinal axis that passes through the center of each of the floats, and a power unit is configured so that the first and second floats and a shaft portion rotate integrally, and the shaft portion is connected to the power unit.

5. 5. An amphibious dredger as claimed in claim 1, wherein the blades each having a spiral structure are welded to the first and second floats, respectively.

6. The connection portion has an internal thread structure, The hydraulic excavator connected to the connection portion has an external thread structure.

2. An amphibious dredge as claimed in claim 1.

Images