KR102346580B1 - Dredging vessel for soft ground and narrow waterway - Google Patents

Abstract

The present invention is a main buoyancy body having an internal space of a predetermined size and having a propulsion engine therein and having a cab on the upper surface; a side buoyancy body having an internal space of a predetermined size and provided on both sides of the main buoyancy body; a sprocket which is installed at the front end and the rear end of the side buoyancy body, respectively, and rotates by a driving engine; a plurality of support rollers provided to be rotatable at the lower end of the side buoyancy body; a caterpillar fastened to mesh with the sprocket and at the same time surround the support roller; a multi-joint boom bar installed on the main buoyancy body corresponding to the front side of the cab; and a dredge for soft ground and narrow waterways including a screw installed in the rear of the main buoyancy body to rotate by the driving force of the propulsion engine.

Description

Dredging vessel for soft ground and narrow waterway

The present invention relates to a dredge for soft ground and narrow waterways, and more particularly, by adopting a side buoyancy body that supports a caterpillar in addition to a main buoyancy body that supports an engine room and a cab, the size and weight are reduced to reduce the size and weight of the soft ground or narrow It relates to an amphibious dredger improved to be suitable for dredging operations in waterways.

In general, dredging refers to the operation of excavating and removing soil or gravel in the water to secure the depth of the water depth of the pier and sea route in the river or port. This dredging operation is performed using equipment called a working ship or a dredger. Conventional dredges employ a dipper method or a grab method, but with the advent of a centrifugal pump, a suction dredge is widely used.

In Patent No. 10-1339890, a boom of a fork crane is mounted on a buoyancy boat (barge) to scoop up sludge or dredged soil with a grab bucket, and a hopper for putting dredged soil in the rear and the dredged soil put into the hopper are set on land The construction of a dredge equipped with a pumping facility for pumping and transporting to location is disclosed. In addition, in the same document, a hood device having a water jet is mounted on the boom of a fork crane instead of a grab bucket, and foreign substances on the bottom of the water are floated by a water jet, and the floating foreign substances are sucked through a vacuum suction pipe and transferred to a pumping facility. A dredge is disclosed.

However, since the dredge having the above configuration is manufactured using a buoyancy boat such as a barge as a main body, there is a limit to work while staying on the water. In order to overcome this limitation, an amphibious dredge that can work on land and water simultaneously has been developed, and Patent No. 10-1013508 discloses such an amphibious dredge.

The amphibious dredger according to the above literature is provided with a propulsion engine that generates power and transmits it with a screw, and has a buoyancy boat equipped with a cab and boom on the upper surface as the body, and consists of caterpillars on both sides of the lower end of the buoyancy boat. It has a configuration in which the caterpillar assembly is mounted.

However, the amphibious dredger of such a configuration is only a configuration in which a caterpillar assembly is simply added to the existing water-type dredge, so there is a limit to work as an amphibious. That is, when the dredger moves using the caterpillar to work on land, the structure of the buoyancy boat designed according to the existing water type is large and heavy, so movement is not free, and it is particularly suitable for working on soft ground or narrow waterways don't

Moreover, when the dredge enters the water for dredging work, the entire capperpillar assembly is submerged in water due to the dredge's own weight because the caterpillar assembly is provided on both sides of the lower end of the buoyancy boat. In such a state, if the position of the dredger needs to be moved little by little frequently during the dredging operation, it is difficult to achieve the moving effect even if the caterpillar is operated, and therefore the movement of the dredger has no choice but to rely on the screw.

This situation may be more problematic because the smooth operation of the screw cannot be guaranteed in the dredging operation performed when the water depth is shallow or foreign substances such as water plants or underwater garbage are scattered.

Republic of Korea Patent Publication No. 10-1013508 : Amphibious Dredge Republic of Korea Patent Publication No. 10-1339890 : Combined Dredge

The present invention was devised in view of the above problems, and includes a main buoyancy body for supporting the engine compartment and the cab, as well as side buoyancy bodies installed on both sides of the main buoyancy body to be provided in the rotation trajectory of the caterpillar This reduces the overall size and weight of the dredger to facilitate dredging on soft ground or in narrow waterways, and at the same time prevents the caterpillar from being completely submerged in water due to the buoyancy of the main and side buoyancy bodies during dredging on water. An object of the present invention is to provide a dredge for soft ground and narrow waterways in which movement of a predetermined distance is achieved only with the power of a caterpillar in a low water depth.

In order to achieve the above object, the dredge for soft ground and narrow waterways according to the present invention includes: a main buoyancy body having an internal space of a predetermined size and having a propulsion engine therein and a cab on the upper surface; a side buoyancy body having an internal space of a predetermined size and provided on both sides of the main buoyancy body; a sprocket which is installed at the front end and the rear end of the side buoyancy body, respectively, and rotates by a driving engine; a plurality of support rollers provided to be rotatable at the lower end of the side buoyancy body; a caterpillar fastened to mesh with the sprocket and at the same time surround the support roller; a multi-joint boom bar installed on the main buoyancy body corresponding to the front side of the cab; And it may include a screw installed in the rear of the main buoyancy body to rotate by the driving force of the propulsion engine.

According to the dredge for soft ground and narrow waterways of the present invention having the configuration as described above, as well as having a main buoyancy body for supporting the engine room and the cab, the side buoyancy body installed on both sides of the main buoyancy body is formed of a caterpillar Since the overall size and weight of the dredge can be relatively reduced by providing it within the rotational trajectory, it is effective for dredging work on soft ground or narrow waterways.

In addition, according to the dredge for soft ground and narrow waterways of the present invention, it is possible to prevent the caterpillar from being completely submerged in water by the buoyancy of the main buoyancy body and the side buoyancy body during dredging work on water, so the water depth is low or several seconds However, even in the working environment where it is difficult to operate the screw due to the presence of foreign substances, the dredge can be easily moved within a predetermined range by the operation of the caterpillar track.

The improved effects and advantages of the present invention will be more clearly understood through the following detailed description.

The present invention will be described in detail with reference to the drawings below, but since these drawings show embodiments of the present invention, the technical spirit of the present invention should not be interpreted as being limited only to the drawings.
1 is a perspective view showing the schematic configuration of a dredge for soft ground and narrow waterways according to a first embodiment of the present invention.
2 is a side view and a partially enlarged view showing the schematic configuration of a dredge for soft ground and narrow waterways according to the first embodiment of the present invention.
3 is a rear view showing the schematic configuration of a dredge for soft ground and narrow waterways according to the first embodiment of the present invention.
Figure 4 is a partial perspective view showing the schematic configuration of the crushing suction unit provided in the dredger for soft ground and narrow waterways according to the first embodiment of the present invention.
5 is a cross-sectional view showing a schematic configuration of a one-way valve mounted on a suction pipe provided in a dredge for soft ground and narrow waterways according to the first embodiment of the present invention.
6 is a schematic side view for explaining the operation of the dredge for soft ground and narrow waterways according to the first embodiment of the present invention.
7 is a schematic side view for explaining the operation of the dredge for soft ground and narrow waterways according to the first embodiment of the present invention.
8 is a partial perspective view of the caterpillar of the dredge for soft ground and narrow waterways according to the first embodiment of the present invention.
9 is a schematic cross-sectional view for explaining the configuration of a dredge for soft ground and narrow waterways according to a second embodiment of the present invention.
10 is a perspective view of a dredge for soft ground and narrow waterways according to a third embodiment of the present invention.
11 is a perspective view of an orbital unit of a dredge for soft ground and narrow waterways according to a fourth embodiment of the present invention;
12 is a side cross-sectional view of a state in which the orbital unit of FIG. 11 is located at the rear end of the dredge;
13 is a side cross-sectional view of a state in which the orbital unit of FIG. 11 is positioned at the front end of the dredge.

Hereinafter, a detailed configuration of a dredge for soft ground and narrow water channels according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings. Prior to this, it should be understood that since the detailed description of the present specification and the configuration shown in the drawings are only one embodiment of the present invention, there may be various equivalents and modifications that can be substituted for them at the time of the present application. . Also, in the drawings attached to this specification, the same reference numerals denote the same components.

Hereinafter, the term “dredged soil” used in the detailed description and claims of the invention should be understood as a generic term encompassing sand, gravel, sludge, etc. accumulated at the bottom of the water surface of a river or sea.

1 is a perspective view showing a schematic configuration of a dredge for soft ground and narrow waterways according to a first embodiment of the present invention. 2 is a side view and a partially enlarged view showing the schematic configuration of a dredge for soft ground and narrow waterways according to the first embodiment of the present invention. 3 is a rear view showing the schematic configuration of a dredge for soft ground and narrow waterways according to the first embodiment of the present invention. And, FIG. 9 is a schematic cross-sectional view for explaining the configuration of a dredge for soft ground and narrow waterways according to a second embodiment of the present invention. 10 is a perspective view of a dredge for soft ground and narrow waterways according to a third embodiment of the present invention. 11 to 13 are views of a dredge for soft ground and narrow waterways according to a fourth embodiment of the present invention.

Referring to the drawings, the dredge for soft ground and narrow waterways according to the first embodiment of the present invention has an internal space of a predetermined size and a main buoyancy body 100 having a propulsion engine therein, and an internal space of a predetermined size and the side buoyancy bodies 210 and 220 provided on both sides of the main buoyancy body 100, and the caterpillar 300 that is installed and driven to surround the upper and lower surfaces of the side buoyancy bodies 210 and 220. include

The main buoyancy body 100 provides the main buoyancy to the dredge according to the present invention, and may optionally be configured to seal the inner space, but is not necessarily limited thereto. The main buoyancy body 100 may be manufactured by welding a metal material such as steel, or may be formed of polyurethane or high-strength foaming resin.

A propulsion engine (not shown) for propulsion of the dredge on water is provided inside the main buoyancy body 100, and the driving force of the propulsion engine is provided by a power transmission means (not shown) including a speed reducer or a drive shaft. It is transmitted to the screw 110 installed at the rear of the buoyancy body 100 .

In addition, on the upper surface of the main buoyancy body 100, the operator's cab 120 for operating the dredge is arranged, and the main buoyancy body 100 corresponding to the front side of the cab 120 has three stages for dredging. A foldable multi-joint boom stand 130 is installed.

More specifically, the multi-joint boom unit 130 is rotatably coupled to the end of the first joint portion 131 connected to the boom support unit 130 coupled to the main buoyancy body 100 , and the first joint portion 131 . A second joint portion 132 that is, and a third joint portion 133 that is rotatably coupled to the end of the second joint portion 132, and a plurality of hydraulic cylinders 134, 135 and 136) is provided. Here, the second joint part 132 is rotatable in the counterclockwise direction with respect to the first joint part 131, and the third joint part 133 is rotatable in the clockwise direction with respect to the second joint part 132, It has the advantage of being easy to unfold and fold in a narrow waterway and the load is not eccentric.

A crushing suction unit 140 for crushing and sucking dredged soil such as earth or gravel at the bottom of the water surface is provided at the tip of the third joint unit 133 of the multi-joint boom unit 130 . Referring to FIG. 4 showing the configuration of the grinding suction unit 140 in more detail, the grinding suction unit 140 includes a bucket case 141 and a separate driving means (not shown) in the bucket case 141 . ) and a blade 142 that is rotatably mounted to crush the dredged soil, and a suction pipe 150 connected to the bucket case 141 to suck the crushed dredged soil. The type, shape, size, etc. of the blade 142 is not particularly limited by the present invention, and it should be understood that the dredged soil accumulated on the bottom of the water surface can be appropriately pulverized and any blade 142 may be employed.

The suction pipe 150 extends so as to be connected to a centrifugal pump (not shown) provided in the main buoyancy body 100, and sucks the dredged soil with a suction force generated by the operation of the centrifugal pump, and a transfer pipe (not shown) It functions to transfer to any desired external location through The configuration and functions of the suction pipe 150, the centrifugal pump, and the transfer pipe are already well known, so a more detailed description will be omitted.

Furthermore, the configuration of the crushing suction unit 140 and the suction pipe 150 is not particularly limited by the present invention, and various conventional configurations capable of suction and discharge by appropriately crushing or excavating the dredged soil may be employed. should be understood

According to the first embodiment of the present invention, a one-way valve 160 is installed on the path of the suction pipe 150 to prevent the sucked dredged soil from being transferred in the reverse direction. The schematic configuration of the one-way valve 160 is shown in FIG. 5 .

As shown, the one-way valve 160 is installed at an end of the rotation shaft 162 rotatably mounted on the inner path of the suction pipe 150 and the rotation shaft 162 to transport the dredged soil. It includes a valve plate 164 for opening and blocking the internal path of the suction pipe 150 according to the direction. Furthermore, the suction pipe 150 may be formed to include a free space S for accommodating the rotation shaft to facilitate installation and rotation.

In addition, the one-way valve 160 may be installed at any point on the path including the transfer pipe as well as the suction pipe 162 .

According to the first embodiment of the present invention, side buoyancy bodies 210 and 220 may be provided on both sides of the main buoyancy body 100 . The side buoyancy bodies 210 and 220 are preferably formed to have a sealed inner space of a predetermined size, and are manufactured by welding a metal material such as steel, like the above-described main buoyancy body 100, or polyurethane. Or it may be formed of a high-strength foaming resin, etc., but is not necessarily limited thereto.

As another embodiment of the present invention, the main buoyancy body 100 and the side buoyancy body 210 and 220 may be integrally formed, in this case, the inner space of the main buoyancy body 100 is the side buoyancy body ( 210 and 220) may communicate with each other.

As another alternative, the main buoyancy body 100 and the side buoyancy bodies 210 and 220 may be separately manufactured and assembled with each other.

According to the first embodiment of the present invention, the caterpillar 300 may be provided on the outer peripheral surface of the side buoyancy bodies 210 and 220 to surround them. The configuration of such a caterpillar 300 will be described later.

More specifically, sprockets 230 and 240 are respectively rotatably mounted to the front and rear ends of the side buoyancy bodies 210 and 220, and these sprockets 230 and 240 are provided in the main buoyancy body 100. It may be mechanically connected to a driving engine or motor (not shown) and rotated by the driving force.

In addition, a plurality of support rollers 250 are provided on the lower surface of the side buoyancy bodies 210 and 220, and thus, as shown, the caterpillar 300 is the front end of the side buoyancy bodies 210 and 220 and It may be engaged with the sprockets 230 and 240 provided at the rear end and at the same time be fastened to surround the support roller 250 .

A plurality of support rollers 250 are mounted on the lower surface of the side buoyancy bodies 210 and 220, respectively, are rotatably mounted on the support 374 and are installed to be spaced apart from each other in the longitudinal direction of the support 74, and rotate infinitely In the track 300 , it supports the side positioned below or below with respect to the side buoyancy bodies 210 and 220 .

Additionally, a plurality of rotation rollers 260 are further provided on the upper surfaces of the side buoyancy bodies 210 and 220 to support the caterpillar 300 that is coupled to surround the outer peripheral surfaces of the side buoyancy bodies 210 and 220. . The plurality of rotation rollers 260 are respectively installed on a plurality of upper support brackets 368 respectively installed to be spaced apart from each other in the longitudinal direction of the side buoyancy bodies 210 and 220 on the upper surfaces of the side buoyancy bodies 210 and 220, The buoyancy bodies 210 and 220 are spaced apart from each other in the longitudinal direction of the side buoyancy bodies 210 and 220 on the upper surface of the edge of the width direction.

And, the support 374 is mounted on the lower surface of the side buoyancy bodies 210 and 220 corresponding to the upper surfaces of the side buoyancy bodies 210 and 220 on which a plurality of upper support brackets 68 are installed, referring to FIG. 2 , The support body part 75 extending in the longitudinal direction of the side buoyancy bodies 210 and 220, and the side buoyancy bodies 210 and 220 from both ends of the support body part 75 extend away from each other in the longitudinal direction of the buoyancy bodies 210 and 220, respectively, so as to be inclined upward. It has an extended front end upwardly inclined portion 376 and a rear end upwardly inclined portion 377 .

To summarize the above configuration, in the dredge of the present invention, the caterpillar 300 is not provided at the lower end of the side buoyancy bodies 210 and 220, but is provided to surround the outer peripheral surface of the side buoyancy bodies 210 and 220 do. In other words, the side buoyancy bodies 210 and 220 are provided to be located inside the rotational trajectory of the caterpillar 300, and provide buoyancy against the load of the caterpillar 300 during dredging on water.

More preferably, a plurality of fins (not shown) may be further formed in the caterpillar 300 to serve as a furnace so that the dredger can easily move within a predetermined range during dredging on water. It is not necessarily limited to this.

Meanwhile, referring to FIG. 8 , the caterpillar 300 includes an orbital chain 321 and a plurality of orbital units 341 .

The track chain 321 is meshed with a plurality of sprockets 230 and 240 , and is supported by the support roller 250 and the rotating roller 260 . The plurality of track units 341 extend in a direction orthogonal to the longitudinal direction of the track chain 21 to the track chain 321 and are mounted to be arranged along the track chain 221 . The track chain 321 moves the dredge in the forward direction of the front end of the dredge, and the side positioned above the side buoyancy bodies 210 and 220 is moved from the rear end side of the main buoyancy body 100 to the front end side, and the side buoyancy bodies 210 and 220) The side positioned below the side buoyancy body (210,220) is rotated to move from the front end side to the rear end side.

Conversely, the track chain 321 is such that the dredge is moved in the rear direction of the rear end of the dredge, the side positioned above the side buoyancy bodies 210 and 220 is moved from the front end side to the rear end side of the side buoyancy bodies 210 and 220, and the side buoyancy bodies 210 and 220 ) is rotated to move from the rear end side to the front end side of the side buoyancy body (210,220) located below. Since the track chain 321 is meshed with the sprockets 230 and 240 , it is rotated in the rotation direction of the sprockets 230 and 240 .

The track chain 321 is a plurality of first links 322 arranged to surround the outer peripheral surface of one side or the other side in the width direction of the side buoyancy bodies 210 and 220 in the longitudinal direction of the side buoyancy bodies 210 and 220, and side buoyancy. A plurality of link connecting bars 326 extending in the width direction of the sieves 210 and 220 and connecting the first links 322 through each of the first links 322 adjacent to each other on one side and meshable with the sprockets 230 and 240 and , The first link 322 is arranged so as to surround the outer circumferential surface of one side or the other side in the width direction of the main buoyancy body 2 in the longitudinal direction of the side buoyancy bodies 210 and 220 to face each other and link at one end and the other end adjacent to each other A plurality of second links 331 through which the other side of the connecting bar 326 is provided are provided.

The first link 322 and the second link 331 are supported by the rotating roller 260 when the side facing the side buoyancy body 210 and 220 is positioned above the main buoyancy body 2, and the side buoyancy bodies 210 and 220 ) is supported by the support roller 250 when positioned below or below the

The first link 322 and the second link 331 have link connection bar through-holes 323 and 332 through which the link connection bar 326 penetrates, respectively, on both sides, and the center so as to reduce the load on the track chain 321 . Each side is perforated.

And, the first link 322 has a plurality of first bolt through-holes 324 through which a bolt 351 for coupling with the orbital unit 341 is formed on the central side in the longitudinal direction toward the outside, and the second link A plurality of second bolt through-holes 333 through which the bolts 351 for coupling with the orbital unit 341 are formed are formed at 331 in the central side corresponding to the first link 322 in the width direction.

Referring to the drawings, the first link 322 and the second link 331 are formed symmetrically to each other in the width direction of the side buoyancy bodies 210 and 220, the other end of the link connecting bar 326 than one end of the longitudinal direction. Each is formed to be positioned on the side.

The orbital unit 341 is positioned on the outside of the first link 322 and the second link 331 with respect to the side buoyancy bodies 210 and 220, and the center side of each of the first link 322 and the second link 331 and Bolt 351 is coupled.

The orbital unit 341 extends in a direction perpendicular to the extension direction of the orbital chain 321 and increases the vertical drag with respect to the contacting ground or water bottom to increase the driving force according to the rotation of the sprockets 230 and 240. The first link 322 ) and the second link 331 is formed in a triangular prism shape with a reduced width in a direction away from it.

The orbital unit 341 includes a link coupling portion 342 having a plurality of third bolt through holes 343 through which bolts pass so as to be coupled to the first link 322 and the second link 331 on the center side, and a link; A weight reduction groove 346 formed in a direction away from the first link 322 and the second link 331 from the side facing the first link 322 and the second link 331 on both sides of the coupling part 342 . ) are formed respectively.

The orbital unit 341 may provide auxiliary propulsion to the main buoyancy body 100 and the side buoyancy bodies 210 and 220 by the resistance of water when the caterpillar is rotated in a state spaced apart from the water surface. Unlike the figure, the orbital unit 341 increases the resistance of water in water when the orbital chain 321 rotates in the width direction of the side buoyancy bodies 210 and 220 to easily provide auxiliary propulsion force to the side buoyancy bodies 210 and 220. It may extend to protrude outward with respect to the side buoyancy body (210, 220).

And, according to the first embodiment of the present invention, the upper portion of the main buoyancy body 100 is provided with a spud unit 400 for fixing the position of the dredge during the dredging operation on the water.

Specifically, the deck plate 105 is coupled to the upper surface of the main buoyancy body 100 , and the spud unit 400 may be mounted at both ends of the deck plate 105 .

The spud unit 400 includes a rotation bracket 410 rotatably mounted on the deck plate 105 , a rotation cylinder 420 for rotating the rotation bracket 410 , and the rotation bracket 410 . It is configured to include a guide 430 installed in the , a position fixing column 440 installed to slide along the guide 430 , and a hydraulic cylinder 450 providing a driving force for sliding the position fixing column 440 . .

According to the first embodiment of the present invention, as the rotation bracket 410 is rotated by the driving of the rotation cylinder 420, the guide 430 and the position fixing column 440 are laid down on the upper surface of the dredge. can be switched to a standing state (see the state of FIG. 6 ). Therefore, when the dredge simply moves, the rotating cylinder 420 can be retreated to lay down the guide 430 and the position fixing column 440. It makes it easy to pass through these places.

The spud unit 400 of the above configuration, as shown in the figure, may be provided on both sides of the dredge, that is, on both sides of the deck plate 105, but the number and installation point are the present invention. not limited by As another example, a pair of spuds 400 may be installed in the front and rear portions of the dredge, respectively.

Hereinafter, the operation of the dredge for soft ground and narrow waterways according to an embodiment of the present invention having the above configuration will be described with reference to the accompanying drawings.

The dredge for soft ground and narrow waterways according to the first embodiment of the present invention can move on land using the caterpillar 300 . That is, when the driving engine (not shown) installed inside the main buoyancy body 100 operates, the driving force is the sprockets 230 and 240 installed at the front and rear ends of the side buoyancy bodies 210 and 220, respectively. transmitted, causing it to rotate.

Accordingly, while the caterpillar 300 engaged with the sprockets 230 and 240 rotates, the dredge may move to a desired point.

During such a normal movement, the rotating cylinder 420 is retracted to maintain the spud unit 400 in a laid-down state. do.

In particular, according to the present invention, so that the side buoyancy bodies 210 and 220 are located inside the rotational trajectory of the caterpillar 300, that is, the caterpillar 300 is the outer peripheral surface of the side buoyancy bodies 210 and 220 Since it is installed to wrap, the overall size and weight of the dredge can be relatively reduced. Due to this configuration, the dredger of the present invention is suitable for work in soft ground or narrow waterways where heavy equipment is difficult to enter.

7 shows a state in which the dredge according to the present invention has entered the water surface to dredge the dredged soil at the bottom of the water surface. More specifically, when the dredging operation reaches a required position, the position of the dredge may be fixed for smooth and stable operation.

To this end, as described in FIG. 6 , the piston of the rotation cylinder 420 moves forward to rotate the rotation bracket 410 . Then, the guide 430 and the position fixing column 440 coupled to the rotation bracket 410 may be switched from a lying state to a standing state on the upper surface of the dredge.

In this state, when the piston is retracted by driving the hydraulic cylinder 450, the position fixing column 440 coupled to the end is descended along the guide 430 as shown in the figure, and the descending position The position of the dredge may be fixed by the lower end of the fixing column 440 being supported in contact with the bottom of the water surface.

Then, for the dredging operation, the boom 130 is operated to position the crush suction unit 140 in the dredging area. At this time, as described above, the second joint portion 132 of the boom unit 130 is rotatable in the counterclockwise direction with respect to the first joint portion 131 , and the third joint portion 133 is the second joint portion 132 . ), it can be rotated clockwise, so it is easy to unfold and fold in a narrow waterway and has the advantage that the load is not eccentric.

Then, the blade 142 is rotated by a driving means not shown to excavate while crushing the dredged soil, and the crushed dredged soil floating in the bucket case 141 is sucked together with water by the suction force of a centrifugal pump (not shown). After being sucked into the pipe 150, it is discharged to an arbitrary place determined outside through the transfer pipe. At this time, it is also possible that a separate strainer or grill is installed at the entrance of the suction pipe 150 to filter out relatively large gravel or foreign substances. In addition, a one-way valve 160 is installed on the path of the suction pipe 150 to prevent backflow of the dredged soil according to the operation described with reference to FIG. 5 .

When the dredge needs to move a relatively long distance during the underwater dredging operation, the piston of the hydraulic cylinder 450 is advanced to raise the position fixing column 440 to release the position fixing state, and the main buoyancy body 100 ) by driving the propulsion engine provided therein to rotate the screw 110 connected thereto. Accordingly, by the rotation of the screw 110, the dredge can move a relatively long distance to a desired position.

On the other hand, when the dredge moves in a relatively short distance, it can move using the caterpillar 300 instead of the screw 110 . According to the present invention, since the caterpillar 300 is provided to surround the outer peripheral surfaces of the side buoyancy bodies 210 and 220 that provide buoyancy, even if the dredge enters the water, as shown in FIG. 7 , the caterpillar 300 ) is not entirely submerged in the water, and a part thereof, that is, the upper part of the caterpillar 300 is exposed out of the water. Therefore, in this case, when the caterpillar 300 is rotated by the driving force, the lower part of the caterpillar 300 submerged in water produces an effect of rowing as if it were a paddle, so that the dredge can sufficiently move in a short distance within a predetermined range. When a pin or a wing serving as a furnace of the caterpillar 300 is additionally provided, the effect may be further increased.

9 is a schematic cross-sectional view for explaining the configuration of a dredge for soft ground and a narrow channel according to a second embodiment of the present invention.

Referring to the drawings, the dredge for soft ground and narrow waterways according to the second embodiment of the present invention may further employ an auxiliary buoyancy body 500 .

When the dredger of the present invention needs to be dredged in a place where the water is deep or the current is fast or where the waves are severe, the dredger fluctuates or becomes unstable in the course of the movement, which causes the caterpillar 300 to be submerged in the water. can be brought about In this case, by attaching the auxiliary buoyancy body 500 to provide additional buoyancy, the dredge can ensure stable operation and movement.

As shown in FIG. 9 , the auxiliary buoyancy body 500 may be detachably fastened to the outer surfaces of the side buoyancy bodies 210 and 220 , respectively. Specifically, a fastening groove 510 of a predetermined depth is formed on the outer surface of the side buoyancy bodies 210 and 220, and the fastening groove 510 is directed upward toward the inside of the side buoyancy bodies 210 and 220. is formed This is to ensure that after the auxiliary buoyancy body 500 is fastened, the buoyancy force can be completely transmitted to the side buoyancy bodies 210 and 220 . In addition, a fastening protrusion 520 having a size and shape corresponding to the fastening groove 510 is formed on the side surface of the auxiliary buoyancy body 500 .

For the fastening of the auxiliary buoyancy body 500 and the side buoyancy bodies 210 and 220, a fastening bracket 530 is formed on the upper surface where the auxiliary buoyancy body 500 and the side buoyancy bodies 210 and 220 contact each other. .

Therefore, the coupling protrusion 520 of the auxiliary buoyancy body 500 is coupled to be inserted into the fastening groove 510 of the side buoyancy bodies 210 and 220, and the auxiliary buoyancy body 500 and the side buoyancy body 210 are inserted. And the attachment of the auxiliary buoyancy body 500 can be completed by mutually fastening the fastening brackets 530 respectively formed on the upper surface of the 220 with fastening means such as bolts.

The auxiliary buoyancy body 500 may be manufactured by welding a metal material such as steel to have a sealed inner space of a predetermined size, or may be formed of polyurethane or high-strength foaming resin. It goes without saying that the size and shape of the auxiliary buoyancy body 500 may be variously modified and implemented despite the embodiments and drawings of the present invention.

Meanwhile, FIG. 10 is a perspective view of a dredge for soft ground and a narrow channel according to a third embodiment of the present invention.

Referring to FIG. 10 , the dredge for soft ground and narrow waterways according to the third embodiment of the present invention is a three-stage refraction type boom 130 and crushing suction unit 140 according to an embodiment of the present invention, instead of 140, 2 However, the refraction type boom 130' and the grinding suction unit 140' for crushing the soft ground while being rotated by a rotating shaft (not shown) extending perpendicular to the bottom of the soft ground are applied.

Meanwhile, FIGS. 11 to 13 are views of caterpillars of a dredge for soft ground and narrow waterways according to a fourth embodiment of the present invention.

The caterpillar according to the fourth embodiment of the present invention is the same as the structure of the caterpillar according to the first embodiment of the present invention, except that the soil inflow prevention unit 450 is further mounted on the orbit unit 341 .

The soil inflow prevention unit 450 closes or opens the weight reduction groove 346 of the orbital unit 341 according to the position of the orbital unit 341 with respect to the side buoyancy bodies 210 and 220 to reduce the weight of the soil or foreign substances. Prevents from entering or sticking into the groove 346 .

The soil inflow prevention unit 450 has a support shaft 451 extending in the longitudinal direction of the weight reduction groove 346, and the support shaft 451 penetrates each and is hinged to be rotatable with respect to the support shaft 451, respectively. A first inflow prevention member 460 and a second inflow prevention member 470 are provided so that the weight reduction groove 346 is closed or opened according to the position or inclination of the orbital unit 341 , respectively, rotatable.

The second inflow prevention member 470 is a third support shaft through part 473 through which the support shaft 451 passes, and a third support shaft through part ( The second cover part 471 extending longer in the longitudinal direction of the track unit body 341 than 473), and the third support shaft through part 473 protrude in the radial direction from the outer peripheral surface side, and spaced apart from the second cover part 471 and a second weight part 475 formed at a fixed position.

The first inflow prevention member 460 faces both ends of the third support shaft penetration part 473 and includes first and second support shaft penetration parts 462 and 463 through which the support shaft 451 penetrates, and a second cover part 471. A first cover part 461 extending in parallel in the longitudinal direction of the first and second support shaft pipes, each of which has both ends connected to the outer peripheral surfaces of the first support shaft penetration part 462 and the second support shaft penetration part 463, and the first and second support shaft pipes A plurality of first weight parts 465 respectively protruding in the radial direction from the outer peripheral surfaces corresponding to each other of the cylindrical parts 462 and 463 are provided at positions spaced apart from the first cover part 461 .

In addition, the soil inflow prevention unit 450 is a rotation angle limiting jaw 480 protruding from the third support shaft penetration part 473 so that the rotation angle of the second inflow prevention member 470 and the first inflow prevention member 460 is limited. ) is provided.

Referring to FIG. 11 , the first and second inflow prevention members 460 and 470 are first and second weight parts ( As the 465 and 475 are rotated to be positioned on the same line on the lower side of the support shaft 451 , the first cover part and the second cover part come into contact with the inner peripheral surfaces of the weight reduction grooves 346 facing each other, and the weight reduction grooves 346 are opened. close the side

12 and 13 , in the first cover portion 461 of the first inflow prevention member 460 , the end side adjacent to the inner circumferential surface of the weight reduction groove 346 is adjacent to the first weight portion 465 . A first inclined surface 461a that is thicker and can be in parallel contact with the inner peripheral surface of the weight reduction groove 346 is formed at an end of one side facing the inner peripheral surface of the weight reduction groove 346 . In addition, in the second cover portion 471 of the second inflow prevention member 470 , the end side adjacent to the inner circumferential surface of the weight reduction groove 346 is thicker than the side adjacent to the second weight portion 475 , and the weight is reduced A second inclined surface 471a that can be brought into parallel contact with the inner peripheral surface of the weight reduction groove 346 is formed at an end of one side facing the inner peripheral surface of the groove 346 .

When the orbital unit 341 is positioned perpendicularly or obliquely to the rear ends of the side buoyancy bodies 210 and 220, referring to FIG. 12 , the first inflow of soil or foreign substances introduced into the weight reduction groove 346 is discharged to the outside. The prevention member 460 is rotated toward the open side of the weight reduction groove 346 . And, when the orbital unit 341 is positioned perpendicularly or obliquely to the front ends of the side buoyancy bodies 210 and 220, referring to FIG. 2 The inflow prevention member 470 is rotated toward the open side of the weight reduction groove 346 . In addition, although not shown, when the track unit 341 is positioned so that the open side of the weight reduction groove 346 faces downward, the first and second cover parts 461 and 471 are adjacent to each other at the ends in the direction away from each other. It is rotated to open the weight reduction groove 346 .

In the dredge according to the fourth embodiment of the present invention, the first inflow prevention member 460 and the second inflow prevention member 470 mounted in the orbital unit 341 have a weight reduction groove ( As the 346) is closed or rotated to be open, the soil introduced into the weight reduction groove 346 may be induced to be discharged to the outside without being stagnant.

On the other hand, although not shown, the track unit of the caterpillar according to the fifth embodiment of the present invention is coupled to the first link 322 and the second link 331 so as to increase the driving force according to the rotation of the sprockets 230 and 240. The width of the side that is farther from the first link 322 and the second link 331 than one side is formed to be reduced, and the main buoyancy body 100 and the side buoyancy body (100) and the side buoyancy body ( In order to increase the efficiency of providing auxiliary propulsion to 210 and 220 , the width may be extended again toward the other end of the side away from the first and second links 22 and 31 .

That is, in the track unit, the width between one end side coupled to the first link 322 and the second link 331 and the other end side away from the first link 322 and the second link 331 is the first link 322 . ) and the second link 331 is formed to be narrower than the other end side farther away, and fluid resistance increasing grooves (not shown) introduced on both sides in the width direction are formed, respectively.

The dredge according to the fifth embodiment of the present invention can enhance the effect of providing auxiliary propulsion force to the main buoyancy body 100 and the side buoyancy bodies 210 and 220 by the fluid resistance increasing groove (not shown) of the track unit body.

Although the present invention has been described in detail through embodiments and the accompanying drawings, the technical spirit of the present invention is defined by the matters described in the claims, and various modifications and variations within the scope of the technical spirit of the present invention There may be equivalents.

100: main buoyancy body 110: screw
120: cab 130: boom
140: grinding suction unit 150: suction pipe
160: one-way valve 210, 220: side buoyancy body
230, 240: sprocket 250: support roller
260: rotating roller 300: caterpillar
400: spud unit 410: rotation bracket
420: rotating cylinder 430: guide
440: position fixed column 500: auxiliary buoyancy body
510: fastening groove 520: fastening protrusion
530: fastening bracket

Claims (10)

a main buoyancy body having an internal space of a predetermined size, having a propulsion engine therein, and having a cab on the upper surface;
a side buoyancy body having an internal space of a predetermined size and provided on both sides of the main buoyancy body and integrally formed with the main buoyancy body;
a sprocket which is installed at the front end and the rear end of the side buoyancy body, respectively, and rotates by a driving engine;
a plurality of support rollers provided to be rotatable at the lower end of the side buoyancy body;
a caterpillar fastened to mesh with the sprocket and at the same time surround the support roller;
a multi-joint boom bar installed on the main buoyancy body corresponding to the front side of the cab; and a screw installed at the rear of the main buoyancy body to rotate by the driving force of the propulsion engine,
A plurality of rotation rollers are further provided on the upper surface of the side buoyancy body to support the caterpillar, and the caterpillar is meshed with a plurality of the sprockets and is supported by the support roller and the rotating roller. and a plurality of orbital units mounted to be arranged along the longitudinal direction of the orbital chain,
The orbital chain is
a plurality of first links arranged to surround the outer circumferential surface of the side buoyancy body in the longitudinal direction of the side buoyancy body; A plurality of link connecting bars extending in the width direction of the side buoyancy body and connecting the first links through each of the first links adjacent to each other on one side, and meshable with the sprocket;
A plurality of second links arranged to face the first link and surround the outer circumferential surface of the side buoyancy body in the longitudinal direction of the side buoyancy body and through which the other side of the link connection bar penetrates at one end and the other end adjacent to each other are provided and
The first link and the second link are supported by the support roller and the rotating roller when positioned above or below the side buoyancy body,
The orbital unit is
It extends in a direction orthogonal to the extension direction of the track chain and is coupled to the first link and the second link to be positioned outside the first link and the second link with respect to the side buoyancy body, and is in contact with the ground or The width is reduced in a direction away from the first link and the second link so as to increase the driving force according to the rotation of the sprocket by increasing the vertical drag with respect to the bottom surface, and the first link and the second link on the center side A link coupling portion coupled to and a weight reduction groove formed in a direction away from the first link and the second link from the side facing the first link and the second link are formed on both sides of the link coupling portion, respectively. Dredge for soft ground and narrow waterways, characterized in that. delete According to claim 1,
The internal space of the main buoyancy body is a dredger for soft ground and narrow waterways, characterized in that it communicates with the internal space of the side buoyancy body. delete According to claim 1,
At the tip of the boom,
bucket case; a blade rotatably mounted in the bucket case to crush the dredged soil; and a pulverized suction unit including a suction pipe connected to the bucket case to suck the pulverized dredged soil. According to claim 1,
A deck plate is further installed on the upper surface of the main buoyancy body,
a rotation bracket mounted rotatably on the deck plate; a rotating cylinder for rotating the rotating bracket; a guide installed on the rotation bracket; a position fixing column installed to slide along the guide; and a spud portion including a hydraulic cylinder providing a driving force for sliding the position fixing column. According to claim 1,
Further comprising an auxiliary buoyancy body having a sealed inner space of a predetermined size that is detachably fastened to the outer surface of the side buoyancy body,
A fastening groove of a predetermined depth is formed on the outer surface of the side buoyancy body toward the top toward the inside,
The auxiliary buoyancy body,
a fastening protrusion having a size and shape corresponding to the fastening groove on one side; and a bracket formed on the upper surface for fastening to the side buoyancy body. delete According to claim 1, wherein the orbital unit is
The caterpillar is coupled to the first link and the second link to increase the resistance of water for providing auxiliary propulsion force to the main buoyancy body and the side buoyancy body while rotating when floating in water without contacting the bottom surface of the caterpillar The width between the one end side and the other end away from the first link and the second link is formed to be narrower than the other end side away from the first link and the second link, so that the fluid resistance increasing groove is formed on both sides in the width direction, respectively Features a dredge for soft ground and narrow waterways. The method of claim 1, wherein the caterpillar
Soil mounted in the weight reduction groove to close or open the weight reduction groove of the track unit according to the position of the track unit with respect to the side buoyancy body to prevent soil or foreign substances from flowing into or sticking into the weight reduction groove Further provided with an inflow prevention unit,
The soil inflow prevention unit is
A support shaft extending in the longitudinal direction of the weight reduction groove and the support shaft pass through each and are respectively rotatably hinged with respect to the support shaft so that the weight reduction groove is closed or opened according to the inclination of the track unit, respectively A dredge for soft ground and narrow waterways, characterized in that it has a first inflow prevention member and a second inflow prevention member that can be rotated.

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