Device convenient for replacing and overhauling reamer

Abstract

The invention discloses a device facilitating replacement and overhaul of a reamer, and relates to the technical field of dredging ships. Comprising a reamer device, a reamer large arm, a traction mechanism and a reamer adjusting mechanism, the reamer device is installed at the tail end of the reamer large arm and comprises a reamer head, a reamer cylinder and a power cylinder, and the reamer adjusting mechanism is installed on the reamer large arm and connected with the reamer head through a connecting piece. Through the arrangement of the traction mechanism and the like, in the overhauling process, an operator only needs to hang a hook of a chain on a hanging rod, then the reamer device and the reamer adjusting mechanism are separated by rotating a screw joint column, the reamer device is kept in a stable state under traction of the chain, and then the chain is wound and unwound by controlling a winding roller; the reamer device is gradually rotated to a posture facilitating hoisting, the cylinder surface part of the power cylinder faces upwards, and hoisting can be carried out by hanging a sling of equipment such as a crane on the hoisting ring at the moment.

Description

Technical Field

[0001] The present invention relates to the technical field of dredgers, and specifically to a device for facilitating the replacement and maintenance of a cutter head. Background Art

[0002] During the dredging process, the cutter head constantly contacts and rubs against hard objects such as underwater sediment and stones, resulting in wear of the cutter teeth and the cutter body, affecting the cutting efficiency and effect of the cutter head. And long-term use or improper operation may cause damage to the components of the cutter head, such as broken cutter teeth, deformed cutter body or loose connecting bolts, etc. These faults will affect the normal operation of the cutter head and may even lead to equipment accidents. Therefore, regularly replacing and maintaining the cutter head is a necessary task for maintaining the dredger. However, the weight and volume of the cutter head make its disassembly and installation process extremely inconvenient, and large lifting equipment is required for operation, which not only increases the complexity of the operation but also raises the safety risk. For example, during the replacement process of the cutter head, when the cutter head disconnects from the cutter arm, due to the large weight of the cutter head, even with the traction of the suspension equipment, it is prone to sudden position changes. Considering the weight and volume of the cutter head device, this poses a considerable danger to the operators. Therefore, in response to this situation, the present invention proposes a new solution. Summary of the Invention

[0003] The purpose of the present invention is to provide a device for facilitating the replacement and maintenance of a cutter head to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A device for facilitating the replacement and maintenance of a cutter head, comprising: A cutter head device, a cutter head boom, a traction mechanism and a cutter head adjustment mechanism; The cutter head device is installed at the end of the cutter head boom. The cutter head device includes a cutter head, a cutter barrel and a power cylinder; The cutter head adjustment mechanism is installed on the cutter head boom and is connected to the cutter head through a connecting member to realize the angle adjustment of the cutter head device by the cutter head adjustment mechanism; The connecting member is connected to the cutter head adjustment mechanism in a separable structure. The traction mechanism includes a pulling member installed on the power cylinder and a winding roller rotatably installed on the cutter head boom. The pulling member and the winding roller are connected by a chain.

[0005] Furthermore, regarding this solution, the cutter head boom at least includes two parallel steel or alloy plates. Two rotating feet are provided on the surface of the cutter barrel. The rotating feet are integrally formed with the cutter barrel to ensure the connection strength between them. The cutter barrel is rotatably installed between the two sides of the cutter head boom through the two rotating feet.

[0006] Regarding this solution, further, a rotating seat is provided at the rotating connection between the cutter boom and the rotating support feet. The middle part of the rotating seat is set to an arc shape adapted to the rotating support feet, and the top of the rotating seat is open. A limit cover is provided on the top of the rotating seat. One side of the limit cover is also set to an arc shape and cooperates with the rotating seat to limit the rotating support feet. The limit cover is connected and fixed to the rotating seat by bolts.

[0007] Regarding this solution, further, a fixing frame is installed at the position of the cutter boom close to the cutter device. The cutter adjusting mechanism includes an oil cylinder installed on the fixing frame. Two support arms are rotatably installed on the surface of the cutter barrel. The connecting piece is a connecting foot column rotatably installed between the ends of the two support arms. A threaded hole is provided on the connecting foot column. Among them, the connecting piece further includes a screwing column connected to the connecting foot column.

[0008] Regarding this solution, further, one end of the screwing column is screwed to the telescopic end of the oil cylinder. The end of the screwing column away from the oil cylinder is provided with threads and can be screwed to the threaded hole on the connecting foot column.

[0009] Regarding this solution, further, the traction mechanism includes a pulling piece and a winding roller. The pulling piece includes two side plates fixed on the outer surface of the power cylinder. A hanging rod is welded and fixed between the two side plates. The winding roller is rotatably installed between the cutter booms. Among them, the winding roller is installed at a position closer to the hull than the oil cylinder. A chain is wound on the winding roller. The winding roller is connected to the pulling piece through the chain.

[0010] Regarding this solution, further, the other end of the chain is fixed with a hook. The chain is connected to the hanging rod through the hook. A bearing shaft is also rotatably installed at the side plate close to the power cylinder.

[0011] Regarding this solution, further, at least two sprockets are installed on one side of the cutter boom. One of the sprockets is coaxially fixed to the winding roller. The two sprockets are connected by a chain. The other sprocket is rotatably installed at the position of the cutter boom close to the hull. A driving source for driving the sprocket to rotate is installed at the position of the cutter boom close to the hull. The driving source can be a motor or an engine, etc.

[0012] Regarding this solution, further, the cutter device rotates along the first direction with the axis of the rotating seat as the rotation axis. A number of lifting rings are also provided on the cylinder surface of the power cylinder for convenient lifting.

[0013] Compared with the prior art, the beneficial effects of the present invention are: The device facilitating the replacement and maintenance of the reamer, through the arrangement of a traction mechanism and others, during the maintenance process, the operator only needs to hang the hook of the chain on the hanging rod, and then separate the reamer device from the reamer adjustment mechanism by rotating the screwed column. Under the traction of the chain, the reamer device maintains a stable state. Subsequently, by controlling the winding roller to take in and release the chain, the reamer device gradually rotates to a posture convenient for lifting, with the cylindrical surface part of the power cylinder facing upwards. At this time, hanging the sling of equipment such as a crane on the lifting ring can perform the lifting. The whole process is simple and convenient to operate, effectively reducing the labor intensity and safety risks, and improving the maintenance efficiency.

[0014] Meanwhile, the above-mentioned device for maintaining the reamer is optimized during the maintenance process through the structural arrangement, providing necessary guarantee for the personal safety of the operator. After separating the screwed column from the rotating seat, the operator can leave the reamer device. By gradually releasing the chain through the winding roller, the reamer device rotates automatically under its own weight and rotates until the cylindrical surface of the power cylinder faces upwards. After maintaining stability, the limit cover can be removed. Subsequently, starting the suspension device to vertically lift can make the reamer device break away from the reamer boom for transfer, which effectively avoids the risk that the operator is easily accidentally injured when the posture of the reamer device is unstable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the left axonometric structural schematic diagram of the present invention; Figure 3 is the side three-dimensional perspective structural schematic diagram of the present invention; Figure 4 is the side perspective structural schematic diagram of the present invention.

[0016] In the figure: 1. Reamer head; 2. Reamer barrel; 201. Mud pumping pipe; 202. Rotating support foot; 3. Power cylinder; 301. Lifting ring; 4. Reamer boom; 5. Winding roller; 6. Sprocket; 7. Chain; 8. Chain; 9. Pulling member; 901. Side plate; 902. Hanging rod; 903. Bearing shaft; 10. Support arm; 11. Connecting foot column; 12. Fixed frame; 13. Oil cylinder; 131. Screwed column; 14. Rotating seat; 15. Limit cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Such as Figure 1 andFigure 2 As shown in the figure, the present invention provides a technical solution: a device for facilitating the replacement and maintenance of a reamer, including a reamer device, a reamer boom 4, a traction mechanism, and a reamer adjustment mechanism; The reamer boom 4 is installed on the hull of the cutter suction dredger and can rotate around the hinge installation point on the hull. By controlling the rotation of the reamer boom 4, the reamer device is installed at the end of the reamer boom 4. The reamer device includes a reamer head 1, a reamer barrel 2, and a power barrel 3. A drive source for driving the reamer head 1 is installed in the power barrel 3. Below the reamer barrel 2 is a pump mud pipe 201 for transporting silt. The drive source is connected to the reamer head 1 through a reducer or output shaft installed in the reamer barrel 2. The bottom silt is directly broken by the reamer head 1. Among them, the reamer adjustment mechanism is installed on the reamer boom 4 and is connected to the reamer head 1 through a connecting piece. The angle adjustment of the reamer device is realized through the reamer adjustment mechanism, so that the reamer device can accurately break the silt within a small range. At the same time, the connection between the reamer adjustment mechanism and the connecting piece is a detachable structure. During the maintenance process of the reamer, the connecting piece is separated from the reamer adjustment mechanism. The traction mechanism includes a pulling member 9 installed on the power barrel 3 and a winding roller 5 rotatably installed on the reamer boom 4. The pulling member 9 and the winding roller are connected by a chain 8. During the disassembly process of the reamer device for maintenance, the reamer device is stably adjusted to a posture suitable for lifting by a gantry, a crane, or a sling device through the cooperation of the pulling member 9 and the winding roller 5, which facilitates the maintenance and repair of the reamer.

[0019] As Figure 2 and Figure 3 shown, to ensure the smooth implementation of the above embodiments, it should be understood that the reamer boom 4 includes at least two parallel steel or alloy plates. Two rotating feet 202 are provided on the surface of the reamer barrel 2. The rotating feet 202 are integrally formed with the reamer barrel 2 to ensure the connection strength between them and the reamer barrel 2. In this embodiment, the reamer barrel 2 is rotatably installed between the two sides of the reamer boom 4 through the two rotating feet 202. That is to say, after the reamer device is connected to the reamer boom 4, it rotates clockwise / counterclockwise around the connection point with the reamer boom 4, providing the necessary conditions for the rotation of the reamer device; As Figure 3As shown in the figure, for the convenience of the rotation and disassembly of the reamer device, a rotating seat 14 is provided at the rotating connection between the reamer boom 4 and the rotating support leg 202. The middle part of the rotating seat 14 is set to an arc shape adapted to the rotating support leg 202, and the top of the rotating seat 14 is open. That is to say, the rotating support leg 202 of the reamer barrel 2 can be directly seated on the rotating seat 14, and due to the shape setting of the rotating seat 14, the rotating support leg 202 can rotate. To prevent the reamer device from disengaging from the rotating seat 14 during rotation, a limit cover 15 is provided at the top of the rotating seat 14. One side of the limit cover 15 is also set to an arc shape and cooperates with the rotating seat 14 to limit the rotating support leg 202. The limit cover 15 is connected and fixed to the rotating seat 14 by bolts. During disassembly, the operator can turn the bolts.

[0020] As Figure 3 shown in the figure, to achieve the control of the angle rotation of the reamer device, a fixed frame 12 is installed at a position on the reamer boom 4 close to the reamer device. The reamer adjustment mechanism includes an oil cylinder 13 installed on the fixed frame 12. Two support arms 10 are rotatably installed on the surface of the reamer barrel 2. The connecting member is a connecting foot column 11 rotatably installed between the ends of the two support arms 10. A threaded hole is opened on the connecting foot column 11. Among them, the connecting member also includes a screwing column 131 screwed to the telescopic end of the oil cylinder 13. One end of the screwing column 131 away from the oil cylinder 13 is provided with a thread and can be screwed to the threaded hole on the connecting foot column 11. That is to say, the angle adjustment mechanism adjusts the angle of the reamer device through the oil cylinder 13 and can be separated from the reamer device by rotating the screwing column 131 when needed, and the operation is relatively simple.

[0021] As Figures 1-3 shown in the figure, to ensure the smooth implementation of this embodiment, the traction mechanism includes a pulling member 9 and a winding roller 5. The pulling member 9 includes two side plates 901 fixed on the outer surface of the power cylinder 3. A hanging rod 902 is welded and fixed between the two side plates 901. The winding roller 5 is rotatably installed between the reamer booms 4. Among them, the winding roller 5 is installed at a position closer to the hull than the oil cylinder 13. A chain 8 is wound on the winding roller 5. The other end of the chain 8 is fixed with a hook, and the chain 8 is connected to the hanging rod 902 through the hook. A bearing shaft 903 is also rotatably installed at a position on the side plate 901 close to the power cylinder 3. During the rotation of the reamer device, the chain 8 passes through the bearing shaft 903 to avoid contact with the power cylinder 3, reducing the problem of damage to the chain 8 caused by friction with the power cylinder 3. At least two sprockets 6 are installed on one side of the reamer boom 4. One of the sprockets 6 is coaxially fixed with the winding roller 5. The two sprockets 6 are connected by a chain 7. The other sprocket 6 is rotatably installed at a position on the reamer boom 4 close to the hull, which can reduce the risk of electric leakage caused by wiring and water immersion. A driving source for driving the sprocket 6 to rotate is installed at a position on the reamer boom 4 close to the hull, and this driving source can be a motor or an engine, etc.

[0022] As Figure 4 shown, in summary, to ensure the smooth implementation of this embodiment, the device is for facilitating the maintenance of the cutter of a trailing suction dredger. In the normal working state, the cutter device is installed at the end of the cutter boom 4 and rotates with the rotating support foot 202 as the hinge point. Driven by the oil cylinder 13, the rotation of the cutter device is controlled. When the cutter device needs to be repaired and replaced, the hook of the chain 8 is manually hung on the hanging rod 902, and then by rotating the screwed column 131, the screwed column 131 is separated from the rotating seat 14. After separating the screwed column 131 from the rotating seat 14, due to the large self-weight of the cutter head 1, the cutter device has a tendency to rotate along the first direction with the hinge point as the axis of rotation. However, under the traction of the chain 8, the cutter device maintains a relatively stable state. Subsequently, the winding roller 5 is controlled to take in and release the chain 8. During the process of releasing the chain 8, the cutter device gradually rotates along the first direction and, after rotating to a stable state, the cylindrical surface part of the power cylinder 3 faces upward. A number of lifting rings 301 are provided on the cylindrical surface of the power cylinder 3. After removing the limit cover 15, the slings of a crane or a hoist are hung on the lifting rings 301 to lift the cutter device; That is to say, the above device for maintaining the cutter is optimized during the maintenance process through the structural arrangement, providing necessary guarantee for the personal safety of the operators. In the specific implementation process, first connect the chain 8 with the pulling member 9 and tighten the winding roller 5 to maintain the stable posture of the cutter device. Subsequently, hang the suspension device on the lifting ring 301. After separating the screwed column 131 from the rotating seat 14, the operator can leave the position of the cutter device. By gradually releasing the chain 8 through the winding roller 5, the cutter device rotates automatically under its own weight and rotates until the cylindrical surface of the power cylinder 3 faces upward. After maintaining stability, remove the limit cover 15. Subsequently, start the suspension device to vertically lift the cutter device 4 to be separated from the cutter boom 4 for transfer, which effectively avoids the risk that the operator is easily injured when the posture of the cutter device is unstable.

[0023] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended embodiments and their equivalents.

Claims

1. A device for facilitating replacement and maintenance of a reamer, characterized in that: include: A reamer device, a reamer arm (4), a traction mechanism and a reamer adjustment mechanism; The reamer device is mounted on the end of the reamer arm (4), and comprises a reamer head (1), a reamer cylinder (2) and a power cylinder (3); The reamer adjustment mechanism is mounted on the reamer arm (4) and is connected to the reamer head (1) via a connecting piece, so that the reamer adjustment mechanism can be used to adjust the angle of the reamer device; The connecting member is connected to the reamer adjustment mechanism in a detachable structure, and the traction mechanism comprises a hooking member (9) mounted on the power cylinder (3) and a winding roller (5) rotatably mounted on the reamer arm (4), and the hooking member (9) and the winding roller are connected via a chain (8).

2. A device for facilitating replacement and maintenance of a reamer according to claim 1, characterized in that: The reamer arm (4) comprises at least two parallel steel or alloy plates, and two rotating feet (202) are arranged on the surface of the reamer cylinder (2). The rotating feet (202) are integrally formed with the reamer cylinder (2) to ensure the connection strength between the reamer cylinder (2), and the reamer cylinder (2) is rotatably mounted between the two sides of the reamer arm (4) via the two rotating feet (202).

3. A device for facilitating replacement and maintenance of a reamer according to claim 2, characterized in that: A rotating seat (14) is provided at the rotating connection between the reamer arm (4) and the rotating support foot (202); the middle portion of the rotating seat (14) is arranged in an arc shape adapted to the rotating support foot (202) and the top of the rotating seat (14) is arranged with an opening; a limit cover (15) is arranged on the top of the rotating seat (14); one side of the limit cover (15) is also arranged in an arc shape and cooperates with the rotating seat (14) to limit the rotating support foot (202); the limit cover (15) is connected and fixed to the rotating seat (14) by bolts.

4. The device for facilitating replacement and maintenance of a reamer according to claim 1, characterized in that: A fixing frame (12) is installed at a position of the reamer arm (4) near the reamer device. The reamer adjustment mechanism includes a cylinder (13) installed on the fixing frame (12). Two support arms (10) are rotatably installed on the surface of the reamer cylinder (2). The connecting member is a connecting foot column (11) rotatably installed between the ends of the two support arms (10). A threaded hole is opened on the connecting foot column (11), wherein the connecting member also includes a screw connection column (131) connected to the connecting foot column (11).

5. The device for facilitating replacement and maintenance of a reamer according to claim 4, characterized in that: One end of the screw connection column (131) is screwed to the telescopic end of the oil cylinder (13), and one end of the screw connection column (131) away from the oil cylinder (13) is provided with a thread and can be screwed to a threaded hole on the connecting foot column (11).

6. The device for facilitating replacement and maintenance of a reamer according to claim 4, characterized in that: The traction mechanism comprises a hook member (9) and a winding roller (5), the hook member (9) comprising two side plates (901) fixed to the outer surface of the power cylinder (3), a hanging rod (902) welded and fixed between the two side plates (901), and the winding roller (5) is rotatably installed between the auger arms (4), wherein the winding roller (5) is installed at a position closer to the hull than the oil cylinder (13), a chain (8) is wound on the winding roller (5), and the winding roller (5) is connected to the hook member (9) via the chain (8).

7. The device for facilitating replacement and maintenance of a reamer according to claim 6, characterized in that: A hook is fixed to the other end of the chain (8), and the chain (8) is connected to the hanging rod (902) through the hook. A bearing shaft (903) is also rotatably mounted on the side plate (901) near the power cylinder (3).

8. The device for facilitating replacement and maintenance of a reamer according to claim 1, characterized in that: At least two sprockets (6) are mounted on one side of the reamer arm (4), one of the sprockets (6) being coaxially fixed to the winding roller (5), the two sprockets (6) being connected via a chain (7), and the other sprocket (6) being rotatably mounted on a position of the reamer arm (4) close to the hull, and a driving source for driving the sprocket (6) to rotate is mounted on the reamer arm (4) close to the hull, and the driving source may be a motor or an engine, etc.

9. The device for facilitating replacement and maintenance of a reamer according to claim 3, characterized in that: The reamer device rotates in a first direction with the axis of the rotating seat (14) as the rotating axis, and a plurality of lifting rings (301) are also provided on the cylinder surface of the power cylinder (3) to facilitate lifting.

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