CN110835934A

CN110835934A - Dredger ship

Info

Publication number: CN110835934A
Application number: CN201910987357.6A
Authority: CN
Inventors: 王应强; 朱全慧; 张新付; 梁堉斌
Original assignee: Guangzhou Wenchong Shipyard Co Ltd
Current assignee: Guangzhou Wenchong Shipyard Co Ltd
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-02-25

Abstract

The invention relates to the technical field of ship engineering, and discloses a dredger, wherein when the dredger is in a working state, a main trunnion is respectively arranged on a first low trunnion seat and a first high trunnion seat to meet the requirements of minimum and maximum dredging depth, and can be switched between the first low trunnion seat and the first high trunnion seat according to the operating conditions to change the height of a rotating point of a bridge frame, so that the same dredger can meet the working requirements of different dredging depths; when the bridge is in a non-working state such as long-term shutdown or dispatch, the locking trunnions on the two sides of the front part of the bridge are installed in the second low trunnion seat or the second high trunnion seat to realize the connection of the front part of the bridge and a hull.

Description

Dredger ship

Technical Field

The invention relates to the technical field of ship engineering, in particular to a dredger.

Background

The cutter suction dredger is characterized in that soil at the river bottom or the sea bottom is loosened by a rotating reamer, the soil and cement are mixed into slurry, the slurry is sucked into a pump body through a mud suction pipe and is conveyed to a mud discharge area through a mud discharge pipe.

The cutter suction dredger is an engineering ship which is applied to the engineering fields of dredging channels, sea reclamation and the like at present. One end of the ship-shaped hull is provided with a slot for installing a bridge frame device provided with equipment such as a reamer and the like. In the construction state of the cutter suction dredger, the bridge rotates for a certain angle around the rotation point, namely the trunnion, and one end of the bridge provided with the reamer descends gradually, so that the reamer is in contact with a submarine working area to cut soil or rocks, and the construction operation is completed.

The bridge trunnion is the key part for connecting the bridge and the ship body, and under the general condition, the cutter-suction dredger is provided with a fixed rotating point, namely the bridge trunnion, and correspondingly, only one set of bridge trunnion seat is arranged on the ship body to serve as a corresponding supporting structure. The installation position of the bridge trunnion of a part of the dredger is low, and the trunnion system is installed below a main deck, so that inconvenience is brought to inspection and maintenance of the bridge trunnion, the maintenance trunnion is designed in the middle of the bridge for maintenance of the main trunnion, and when bridge equipment is overhauled and stopped for a long time or a cutter suction dredger is dispatched, a pull rod is matched with a wedge block to fix the bridge. However, with the continuous development of cutter suction dredger, the number of devices installed on the bridge frame is increased, the weight of the bridge frame is increased, the working requirements for different digging depths are also increased, and the conventional designs of fixing single trunnions, maintaining trunnions, fixing pull rods and the like can not meet the requirements.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the structures of the existing cutter suction dredger, such as a fixed single trunnion, a maintenance trunnion, a fixed pull rod and the like, can not be suitable for the installation of a heavy bridge and the working requirements of different digging depths.

In order to solve the technical problem, the invention provides a dredger, which comprises a dredger body, a bridge and a trunnion system connected between the dredger body and the bridge, wherein the trunnion system comprises a trunnion group arranged on the bridge and a trunnion seat group arranged on the dredger body and matched with the trunnion group;

the trunnion group is including locating the main trunnion of crane span structure rear portion both sides with locate the lock solid trunnion of the anterior both sides of crane span structure, trunnion seat group include with main trunnion complex first low level trunnion seat and first high level trunnion seat and with lock solid trunnion complex second low level trunnion seat and the high level trunnion seat of second, first high level trunnion seat with the difference in height has between the first low level trunnion seat, the high level trunnion seat of second with the difference in height has between the low level trunnion seat of second.

Further preferably, the main trunnion does not have an inclination angle greater than 60 ° in the operating state of the bridge when in the first low trunnion seat position and the first high trunnion seat position.

Further preferably, the trunnion group further includes transfer trunnions disposed on two sides of the middle of the bridge, and the trunnion seat group includes a third trunnion seat matched with the transfer trunnions.

Further preferably, the transfer trunnion is disposed at a center of gravity of the bridge.

Preferably, each trunnion of the trunnion group comprises a cylinder fixing seat, a supporting seat arranged on the bridge, a pin shaft arranged in the supporting seat in a sliding manner, and a hydraulic cylinder, wherein a groove is formed in the rear end of the pin shaft, the bottom of the hydraulic cylinder is arranged in the groove, and a piston rod of the hydraulic cylinder is connected with the cylinder fixing seat.

Further preferably, the supporting seat is further provided with a fixing bolt for preventing the pin shaft from moving, and the fixing bolt is perpendicular to the pin shaft.

Further preferably, each trunnion seat of the trunnion seat set comprises a seat body and a trunnion hole arranged in the seat body, and the seat body is welded with the side of the ship body.

Further preferably, the dredger further comprises a hoisting device for hoisting the bridge, the hoisting device being connected between the hull and the bridge.

Further preferably, the hoisting device comprises a portal frame, a hoisting winch, a steel wire rope, a first pulley block and a second pulley block, the portal frame and the hoisting winch are arranged on the ship body, the portal frame is close to the front part of the bridge frame, the hoisting winch is close to the rear part of the bridge frame, the first pulley block is arranged on the portal frame, the second pulley block is arranged at the front part of the bridge frame, and the hoisting winch is connected with the first pulley block and the second pulley block through the steel wire rope.

Compared with the prior art, the dredger provided by the embodiment of the invention has the beneficial effects that:

the dredger comprises a bridge, a hull, a trunnion system, a main trunnion, a first low trunnion seat, a first high trunnion seat, a trunnion shaft, a main trunnion shaft, a main trunnion; when the bridge is in a non-working state such as long-term shutdown or dispatch, the locking trunnions on two sides of the front part of the bridge are installed in the second low trunnion seat or the second high trunnion seat to realize the connection of the front part of the bridge and a ship body, and the bridge is connected and fixed on the ship body in a two-point fixing mode, so that parts such as an underwater pump, a reamer and the like on the front part of the bridge are prevented from being soaked in a water area for a long time or the resistance of the bridge in the sailing process of the ship body is reduced.

Drawings

FIG. 1 is a schematic structural view of a trunnion system of a dredger according to an embodiment of the invention;

FIG. 2 is a side structural schematic view of a trunnion system of a dredge vessel in accordance with an embodiment of the present invention;

FIG. 3 is a schematic view of the assembled structure of the main trunnion of the dredger according to the embodiment of the invention;

FIG. 4 is a structural schematic view of the main trunnion at A in FIG. 3 in a pulled-out state;

FIG. 5 is a schematic view of an assembly structure of a locking trunnion of a dredger according to an embodiment of the present invention;

FIG. 6 is a schematic view of the embodiment of the present invention illustrating the main trunnion being in the first low trunnion seat and being switched from the operating state to the locked state;

FIG. 7 is a schematic diagram illustrating an embodiment of the present invention in which the main trunnion is switched from the operating state to the locked state when the main trunnion is in the first elevated trunnion seat;

FIG. 8 is a schematic view of the main trunnion of the present invention switching from the first low trunnion seat to the first high trunnion seat;

fig. 9 is a schematic view showing an assembly structure of a transfer trunnion of the dredge vessel according to the embodiment of the present invention.

In the figure, 10, the hull; 20. a bridge frame; 30. a gantry; 40. hoisting a winch; 50. a wire rope; 60. a first pulley block; 70. a second pulley block; 101. a first low trunnion seat; 102. A first high position trunnion base; 103. a second low trunnion seat; 104. a second high position trunnion base; 105. a third trunnion seat; 201. a main trunnion; 202. locking the trunnion; 203. a transfer trunnion; 204. An oil cylinder fixing seat; 205. a supporting seat; 206. a pin shaft; 207. a hydraulic cylinder; 208. a groove; 209. fixing the bolt; 210. a base body; 211. an ear canal hole.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 to 9, a dredger according to a preferred embodiment of the present invention includes a hull 10, a bridge 20, and a trunnion system connected between the hull 10 and the bridge 20, where the trunnion system includes a trunnion group provided on the bridge 20 and a trunnion seat group provided on the hull 10 and engaged with the trunnion group; the trunnion group comprises main trunnions 201 arranged on two sides of the rear portion of the bridge frame 20 and locking trunnions 202 arranged on two sides of the front portion of the bridge frame 20, the trunnion seat group comprises a first low trunnion seat 101 and a first high trunnion seat 102 which are matched with the main trunnions 201, and a second low trunnion seat 103 and a second high trunnion seat 104 which are matched with the locking trunnions 202, a height difference is formed between the first high trunnion seat 102 and the first low trunnion seat 101, and a height difference is formed between the second high trunnion seat 104 and the second low trunnion seat 103.

Specifically, one end of the hull 10 is provided with a slot for installing the bridge 20, the front part of the bridge 20 is provided with equipment for dredging, such as a reamer and an underwater pump, when the dredger is in a working state, the main trunnion 201 at the rear part of the bridge 20 is installed on the first low trunnion seat 101 or the first high trunnion seat 102 of the hull 10, the front part of the bridge 20 slantly extends downwards into the water, the bridge 20 rotates by taking the main trunnion 201 at the rear part of the bridge 20 as a rotation point to dredge, in this embodiment, the main trunnion 201 on the bridge 20 can be selectively installed on the first low trunnion seat 101 or the first high trunnion seat 102, the main trunnion 201 is installed on the first low trunnion seat 101 and the first high trunnion seat 102 to meet the requirements of minimum and maximum dredging, and can be switched between the first low trunnion seat 101 and the first high trunnion seat 102 according to the working conditions, so as to change the height of the rotation point of the bridge frame 20, thereby ensuring that the same dredger can meet the working requirements of different dredging depths; when the bridge is in a non-working state such as long-term shutdown or dispatch, the locking trunnions 202 on two sides of the front portion of the bridge 20 are installed in the second low trunnion seat 103 or the second high trunnion seat 104 to achieve connection between the front portion of the bridge 20 and the hull 10, and the bridge 20 is connected and fixed to the hull 10 in a two-point fixing mode, so that parts such as an underwater pump and a reamer in the front portion of the bridge 20 are prevented from being soaked in a water area for a long time or resistance of the bridge 20 in a sailing process of the hull 10 is reduced.

In order to adapt to dredger of different sizes and models and ensure that the inclination angle of the bridge 20 in the working state can better contact with silt or sediment in the water and force the dredging, the inclination angle B of the bridge 20 in the working state is not more than 60 degrees when the main trunnion 201 is arranged at the first low trunnion base 101 and the first high trunnion base 102.

Further, the trunnion group further includes transfer trunnions 203 disposed on two sides of the middle of the bridge 20, the trunnion seat group includes a third trunnion seat 105 engaged with the transfer trunnion 203, when the main trunnion 201 is switched between the first low trunnion seat 101 and the first high trunnion seat 102, the engagement between the transfer trunnion 203 and the third trunnion seat 105 can ensure that the bridge 20 and the hull 10 are still connected, with reference to fig. 6 to 9, that is, when the main trunnion 201 needs to be switched from the first low trunnion seat 101 to the first high trunnion seat 102 or from the first high trunnion seat 102 to the first low trunnion seat 101, before switching, the transfer trunnions 203 on two sides of the middle of the bridge 20 are installed in the third trunnion seat 105 to ensure the connection between the bridge 20 and the hull 10, and then the rear portion of the bridge 20 is rotated around the transfer trunnion 203 to the switched trunnion seat position, because the weight of the devices on the bridge 20 and the bridge 20 is large, the mode operation through rotatory switching is more laborsaving, and simultaneously, the transfer trunnion 203 also can be used as crane span structure 20 maintenance trunnion group concurrently, is convenient for lie in the crane span structure 20 overhaul of the equipments under the deck. Preferably, to ensure that bridge 20 remains stable during switching, and to reduce rocking of bridge 20, transfer trunnions 203 are positioned at the center of gravity of bridge 20.

In this embodiment, each trunnion (including main trunnion 201, fastening trunnion and transfer trunnion 203) of trunnion group all includes hydro-cylinder fixing base 204, locate supporting seat 205 on crane span structure 20, slide and locate round pin axle 206 and hydraulic cylinder 207 in supporting seat 205, the rear end of round pin axle 206 is equipped with recess 208, hydraulic cylinder 207's cylinder bottom is located in recess 208, hydraulic cylinder 207's piston rod and hydro-cylinder fixing base 204 are connected, hydraulic cylinder 207 drives the piston rod and stretches out, thereby it stretches out in order to cooperate the assembly with the trunnion axle bed to drive round pin axle 206, through using hydraulic cylinder 207 to drive round pin axle 206, can realize fast, accurately that installation and dismantlement of trunnion on crane span structure 20, make constructor avoid complicacy, heavy physical labor, and the maintenance period has been reduced simultaneously.

Each trunnion seat (including first low trunnion seat 101, first high trunnion seat 102, second low trunnion seat 103, second high trunnion seat 104, third trunnion seat 105 and interim trunnion seat) of trunnion seat group all includes the pedestal 210 and locates the trunnion hole 211 in the pedestal 210, and the round pin axle 206 of trunnion inserts in the trunnion hole 211 in order to realize being connected of trunnion and trunnion seat, and wherein,

pedestal

210 and 10 lateral parts welded fastening of hull. Further, the supporting seat 205 is further provided with a fixing pin 209 for preventing the pin shaft 206 from moving, the fixing pin 209 is perpendicular to the pin shaft 206, and when the hydraulic cylinder 207 pushes the pin shaft 206 of the trunnion to completely go deep into the trunnion hole 211, the fixing pin 209 is utilized to limit the pin shaft 206 of the trunnion and the seat body 210 from moving relatively, so that the stability of the whole structure is improved.

The dredger in the embodiment further comprises a lifting device for lifting the bridge 20, the lifting device is connected between the hull 10 and the bridge 20, the lifting device is used for lifting the bridge 20 so as to assemble the bridge 20 with the trunnion seat on the hull 10, the lifting device comprises a portal frame 30, a lifting winch 40, a steel wire rope 50, a first pulley block 60 and a second pulley block 70, the portal frame 30 and the lifting winch 40 are both arranged on the hull 10, the portal frame 30 is arranged close to the front part of the bridge 20, the lifting winch 40 is arranged close to the rear part of the bridge 20, the first pulley block 60 is arranged on the portal frame 30, the second pulley block 70 is arranged at the front part of the bridge 20, the lifting winch 40 and the first pulley block 60 and the second pulley block 70 are connected through the steel wire rope 50, and the steel wire rope 50 is driven to extend or contract through the lifting winch 40 to drive the front part of the bridge 20 to be lifted through the action of the first pulley, the crane span structure 20 is lifted by the lifting device, so that heavy labor in manual work is avoided, efficiency can be effectively improved, and due to the fact that the crane span structure 20 is heavy, two groups of lifting winches 40, steel wire ropes 50, first pulley blocks 60 and second pulley blocks 70 are arranged to act together, so that the crane span structure 20 can be stably lifted.

The working process of the invention is as follows: when the dredger is in a working state, a main trunnion 201 at the rear part of a bridge 20 is mounted on a first low trunnion seat 101 or a first high trunnion seat 102 of a ship body 10, the front part of the bridge 20 obliquely extends downwards into a water area, the bridge 20 rotates by taking the main trunnion 201 at the rear part of the bridge 20 as a rotation point to perform dredging action, when the depth of the water area or the depth of silt of a riverbed changes, a transfer trunnion 203 of the bridge 20 is mounted in a third trunnion seat 105, the main trunnion 201 is switched to a trunnion seat at a corresponding height position by rotating the rear part of the bridge 20, the transfer trunnion 203 is mounted and dismounted, and the bridge 20 is obliquely placed into the water area to perform dredging operation; when the bridge is in a non-working state such as long-term shutdown or dispatch, at this time, the main trunnion 201 is in an installation state, the locking trunnions 202 on the two sides of the front portion of the bridge 20 are installed in the second low trunnion seat 103 or the second high trunnion seat 104 to achieve connection between the front portion of the bridge 20 and the hull 10, and the bridge 20 is connected and fixed to the hull 10 in a two-point fixing manner, so that components such as an underwater pump and a reamer on the front portion of the bridge 20 are prevented from being soaked in water for a long time or resistance of the bridge 20 during navigation of the hull 10 is reduced.

To sum up, the embodiment of the present invention provides a dredger, wherein a trunnion system is arranged between a bridge 20 and a hull 10, the trunnion system comprises a trunnion group arranged on the bridge 20 and a trunnion seat group arranged on the hull 10 and matched with the trunnion group, specifically, when the dredger is in a working state, a main trunnion 201 on the bridge 20 can be selectively installed on a first low trunnion seat 101 or a first high trunnion seat 102, the main trunnion 201 is installed on the first low trunnion seat 101 and the first high trunnion seat 102 and can respectively meet the minimum and maximum dredging requirements, and the main trunnion 201 can be switched between the first low trunnion seat 101 and the first high trunnion seat 102 according to an operation condition to change the height of a rotation point of the bridge 20, so as to ensure that the same dredger can meet the working requirements of different dredging depths; when the bridge is in a non-working state such as long-term shutdown or dispatch, the locking trunnions 202 on two sides of the front portion of the bridge 20 are installed in the second low trunnion seat 103 or the second high trunnion seat 104 to achieve connection between the front portion of the bridge 20 and the hull 10, and the bridge 20 is connected and fixed to the hull 10 in a two-point fixing mode, so that parts such as an underwater pump and a reamer in the front portion of the bridge 20 are prevented from being soaked in a water area for a long time or resistance of the bridge 20 in a sailing process of the hull 10 is reduced.

It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A dredger is characterized by comprising a hull, a bridge and a trunnion system connected between the hull and the bridge, wherein the trunnion system comprises a trunnion group arranged on the bridge and a trunnion seat group arranged on the hull and matched with the trunnion group;

2. A dredger according to claim 1, wherein the angle of inclination of the bridge in the operative condition of the main trunnion in both the first low trunnion seat and the first high trunnion seat positions is no greater than 60 °.

3. The dredger according to claim 2, wherein the trunnion group further includes transfer trunnions disposed on both sides of a middle portion of the bridge, and the trunnion seat group includes a third trunnion seat engaged with the transfer trunnions.

4. A dredger according to claim 3, wherein the transit trunnion is arranged at the centre of gravity of the bridge.

5. The dredger according to any one of claims 1-4, wherein each trunnion of the trunnion set comprises a cylinder fixing seat, a supporting seat arranged on the bridge, a pin slidably arranged in the supporting seat, and a hydraulic cylinder, a groove is formed at a rear end of the pin, a bottom of the hydraulic cylinder is arranged in the groove, and a piston rod of the hydraulic cylinder is connected with the cylinder fixing seat.

6. A dredger according to claim 5, wherein the support base is further provided with a fixing pin for preventing the pin shaft from moving, the fixing pin being arranged perpendicularly to the pin shaft.

7. A dredger according to claim 6, wherein each trunnion seat of the trunnion seat set comprises a seat body welded to the side of the hull and an trunnion hole provided in the seat body.

8. A dredger according to claim 7, further comprising a hoist for lifting the bridge, the hoist being connected between the hull and the bridge.

9. The dredge vessel of claim 8, wherein the hoisting device comprises a gantry, a hoisting winch, a wire rope, a first pulley block, and a second pulley block, the gantry and the hoisting winch are both disposed on the hull, the gantry is disposed near a front portion of the bridge, the hoisting winch is disposed near a rear portion of the bridge, the first pulley block is disposed on the gantry, the second pulley block is disposed at a front portion of the bridge, and the hoisting winch and the first pulley block and the second pulley block are connected by the wire rope.