Ship unloader with boom lifting system

Abstract

The present invention relates to the technical field of port equipment, and specifically to a ship unloader with a boom lifting system, comprising a boom, a material-retrieving device, a gantry, and a boom lifting system; the material-retrieving device is suitable for digging materials and comprises a chain bucket arm, and the chain bucket arm is connected to the boom; the gantry comprises a door leg, and the door leg is arranged on the side of the boom; the boom lifting system comprises a gear, a rack, and a drive structure, the rack is arranged on the side of the door leg in the vertical direction, and the drive structure is connected to the boom; the gear is connected to the output end of the drive structure and meshes with the rack. The ship unloader with a boom lifting system provided by the present invention realizes the overall lifting of the boom and can conveniently adjust the height of the boom and the chain bucket arm within a wide range.

Description

Technical Field

[0001] The present invention relates to the technical field of port equipment, and in particular to a ship unloader with an arm lifting system. Background Art

[0002] Bucket chain ship unloaders have a long history of use at bulk cargo unloading terminals in ports and offer significant environmental advantages. Traditional bucket chain ship unloaders typically employ a portal structure, with the bucket chain arm fixed to the front end of the boom. The arm's movement is achieved through the rotation and pitching of the boom. However, adjusting the position of the bucket chain arm requires the coordinated efforts of the slewing mechanism, pitching mechanism, and bucket chain arm lifting mechanism. This adjustment method is complex and cumbersome, resulting in low overall ship unloading efficiency. This is especially true when significantly adjusting the position in the depth direction of the ship, requiring the pitching mechanism and bucket chain arm lifting mechanism to collaborate, significantly impacting overall ship unloading efficiency. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the position adjustment of the chain bucket arm requires the joint completion of multiple structures, resulting in low ship unloading efficiency, thereby providing a ship unloader with an arm lifting system that improves the ship unloading efficiency.

[0004] In order to solve the above problems, the present invention provides a ship unloader with a boom lifting system, including a boom, a material-retrieving device, a gantry and a boom lifting system; the material-retrieving device is suitable for digging materials, including a chain bucket arm, and the chain bucket arm is connected to the boom; the gantry includes a door leg, and the door leg is arranged on the side of the boom; the boom lifting system includes a gear, a rack and a drive structure, the rack is arranged on the side of the door leg in the vertical direction, and the drive structure is connected to the boom; the gear is connected to the output end of the drive structure and engages with the rack.

[0005] Optionally, the boom lifting system further includes a reducer, and the gear is connected to the output end of the driving structure via the reducer.

[0006] Optionally, the driving structure is a driving motor.

[0007] Optionally, the rack is arranged on the side of the door leg facing the arm.

[0008] Optionally, the driving structure and the reducer are both connected to the top of the boom, and the gear is located above the boom.

[0009] Optionally, there are four door legs, which are distributed in a rectangular shape on both sides of the arm, and each door leg is provided with the rack.

[0010] Optionally, the boom lifting system further includes a locking structure, which is connected to the boom and is used to lock the boom at a corresponding height of the door leg.

[0011] Optionally, a locking structure is provided on both sides of at least one of the door legs, respectively, for clamping the door leg from both sides of the door leg.

[0012] Optionally, a locking structure is provided on both sides of each door leg.

[0013] Optionally, the locking structure is a hydraulic cylinder and / or a rail clamp.

[0014] The present invention has the following advantages:

[0015] 1. The ship unloader with a boom lifting system provided by the present invention achieves overall boom lifting and lowering through the boom lifting system, allowing for convenient adjustment of the boom and chain bucket arm heights over a wide range, significantly improving overall loading and unloading efficiency while also effectively enhancing the ship unloader's safety in extreme weather conditions. A rack is vertically mounted on the portal leg and meshes with a gear mounted on the boom. Rotation of the gear causes the boom to rise and fall vertically, driving the chain bucket arm and reclaiming device to rise and fall vertically as well. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic diagram of a ship unloader with a boom lifting system according to the present invention is shown;

[0018] Figure 2 A partial schematic diagram of a ship unloader with a boom lifting system according to the present invention is shown;

[0019] Figure 3 A partial top view of a ship unloader with a boom lifting system according to the present invention is shown;

[0020] Figure 4 It is a schematic diagram of the material taking device of the present invention;

[0021] Figure 5 for Figure 4 Local magnification in Figure 1 ;

[0022] Figure 6 for Figure 4Local magnification in Figure 2 ;

[0023] Figure 7 This is a schematic diagram of the coordination between the swing mechanism and the material taking device of the present invention;

[0024] Figure 8 Schematic diagram of multiple swing positions of the material taking device of the present invention;

[0025] Figure 9 It is a partial schematic diagram of the hopper chain of the present invention;

[0026] Figure 10 It is a schematic diagram of the hopper of the present invention.

[0027] Description of reference numerals:

[0028] 10. Gantry; 11. Gantry legs; 13. Traveling trolley; 20. Cabin; 30. Materials; 40. Wharf foundation;

[0029] 100, reclaiming device; 101, drive motor; 102, drive sprocket; 103, rotary shaft; 104, chain bucket arm; 1051, first redirecting sprocket; 1052, second redirecting sprocket; 106, tensioning push rod; 107, cover; 108, tensioning sprocket; 110, hopper chain; 111, hopper; 112, connecting plate; 113, hopper back plate; 114, lug plate;

[0030] 120, lifting section; 130, first descending section; 140, second descending section; 150, taking section; 160, unloading section;

[0031] 200, swing mechanism; 201, swing mechanism tensioning cylinder; 202, swing mechanism traction rope; 203, swing mechanism redirection pulley; 204, swing mechanism damping cylinder; 205, damping pulley; 206, traction hinge;

[0032] 210, first swing state; 220, second swing state; 230, third swing state;

[0033] 600, boom lifting system; 601, boom; 602, gear; 603, rack; 604, drive structure; 605, reducer; 606, locking structure. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0037] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] like Figures 1 to 10 As shown, this embodiment provides a ship unloader with a boom lifting system 600, including a boom 601, a material-retrieving device, a gantry 10 and a boom lifting system 600; the material-retrieving device is suitable for digging materials, and includes a chain bucket arm, and the chain bucket arm is connected to the boom 601; the gantry 10 includes a door leg 11, and the door leg 11 is arranged on the side of the boom 601; the boom lifting system 600 includes a gear 602, a rack 603 and a drive structure 604, the rack 603 is arranged on the side of the door leg 11 in the vertical direction, and the drive structure 604 is connected to the boom 601; the gear 602 is connected to the output end of the drive structure 604 and meshes with the rack 603.

[0039] The boom lifting system 600 allows for the overall lifting of the boom 601, allowing for convenient adjustment of the height of the boom 601 and the chain arm within a wide range. This significantly improves overall loading and unloading efficiency while also effectively enhancing the safety of the ship unloader in extreme weather conditions. A rack 603 is vertically mounted on the gantry leg 11 and meshes with a gear 602 mounted on the boom 601. Rotation of the gear 602 vertically raises and lowers the boom 601, driving the chain arm and reclaimer to rise and fall vertically.

[0040] In a specific embodiment, the door frame 10 includes a plurality of door legs 11 , a first crossbeam sequentially connecting the door legs 11 at the top of the door legs 11 , and a second crossbeam sequentially connecting the door legs 11 at the bottom of the door legs 11 .

[0041] In this embodiment, the boom lifting system 600 further includes a reducer 605, and the gear 602 is connected to the output end of the driving structure 604 via the reducer 605. The reducer 605 plays the role of transmission and deceleration.

[0042] In this embodiment, the driving structure 604 is a driving motor.

[0043] In this embodiment, the rack 603 is arranged on the side of the door leg 11 facing the arm 601 to facilitate cooperation with the gear 602.

[0044] In this embodiment, the drive structure 604 and the reducer 605 are both connected to the top of the boom 601, and the gear 602 is located above the boom 601. The drive structure 604 and the reducer 605 are conveniently installed and removed from the boom 601. Operators do not need to tilt their heads upwards to install or remove them, nor do they need to overcome the weight of the drive structure 604 and the reducer 605 to install them on the side and bottom of the boom 601. Furthermore, the connection between the drive structure 604 and the reducer 605 and the boom 601 is not easily misaligned or offset.

[0045] As a convertible embodiment, the rack 603 may be arranged on the side of the door leg 11 perpendicular to the arm 601, the driving structure 604 and the reducer 605 are both connected to the top of the arm 601, and the gear 602 is suspended and connected to the side of the door leg 11.

[0046] In this embodiment, there are four gate legs 11, which are arranged in a rectangular shape on both sides of the boom 601. Each gate leg 11 is provided with a rack 603. Each gate leg 11 is equipped with a boom lifting system 600, which can simultaneously control the boom 601 at four angles to prevent the boom 601 from tilting during the lifting process.

[0047] As a convertible embodiment, the four door legs 11 may be arranged in a rectangular shape on either side of the arm 601. Two of the door legs 11 facing each other and disposed on either side of the arm 601 are each provided with a rack 603, and the other two door legs 11 facing each other and disposed on either side of the arm 601 are engaged in rolling engagement with the arm 601 via a rolling structure. The rolling structure includes rollers connected to the arm 601 and engaged in rolling engagement with the door legs 11, thereby reducing friction between the door legs 11 and the arm 601 and reducing noise. The rolling structure also includes elastic damping elements, through which the rollers are connected to the arm 601. The elastic damping elements can reduce the impact of vibrations caused by the rollers rolling on the arm 601.

[0048] In this embodiment, the arm lifting system 600 further includes a locking structure 606 connected to the arm 601 for locking the arm 601 at a corresponding height of the door leg 11. Specifically, the locking structure 606 can lock the arm 601 from both sides of the door leg 11, or the locking structure 606 can lock the arm 601 from both sides of the door leg 11, or can lock the arm 601 from one side of the door leg 11.

[0049] In this embodiment, a locking structure 606 is provided on both sides of at least one door leg 11, for clamping the door leg 11 from both sides. In a preferred embodiment, a locking structure 606 is provided on both sides of two door legs 11 oppositely arranged on both sides of the arm 601.

[0050] In this embodiment, each of the two sides of the door leg 11 is provided with a locking structure 606. The locking effect is good and no skewing occurs.

[0051] In one implementation of this embodiment, the locking structure 606 is a hydraulic cylinder.

[0052] In another implementation of this embodiment, the locking structure 606 is a rail clamp.

[0053] In another implementation of this embodiment, part of the locking structure 606 is a hydraulic cylinder, and part of the locking structure 606 is a rail clamp.

[0054] In this embodiment, before the arm 601 is raised or lowered, the locking structure 606 is released, the driving structure drives the gear to rotate, and the gear engages with the rack to drive the arm 601 to rise and fall. When it is raised or lowered to the appropriate height, the locking structure 606 clamps the door legs 11 from both sides to fix the height position of the arm 601, and the lifting process ends.

[0055] The ship unloader with the boom lifting system 600 of this embodiment also includes a swinging material-removing assembly, including a material-removing device 100, a rotating shaft 103 and a swinging mechanism 200, the material-removing device 100 is suitable for digging materials 30; the rotating shaft 103 is hingedly connected to the material-removing device 100, and the material-removing device 100 is suitable for swinging around the rotating shaft 103; the swinging mechanism 200 is flexibly connected to the traction hinge 206 of the material-removing device 100; the swinging mechanism 200 is suitable for pulling the material-removing device 100 so that the material-removing device 100 is maintained in a first preset position when not subject to external force; and in the first preset position, the vertical line passing through the center of gravity of the material-removing device 100 is spaced apart from the axis of the rotating shaft 103, and the torque of the material-removing device under the action of gravity makes the material-removing device have a tendency to move toward the land side.

[0056] Preferably, the material taking device 100 includes a hopper chain 110 composed of multiple hoppers 111 connected end to end in sequence. The hopper chain 110 reciprocates in a loop to use the hoppers 111 to dig out materials 30. The specific structure of the material taking device is described in detail below.

[0057] Specifically, the swing mechanism 200 includes a swing mechanism tensioning cylinder 201 and a swing mechanism traction rope 202; one end of the swing mechanism traction rope 202 is connected to the traction hinge 206, and the other end is connected to the swing mechanism tensioning cylinder 201; the swing mechanism tensioning cylinder 201 is suitable for facilitating the movement of the material-retrieving device 100 toward the land side when extended, and driving the material-retrieving device 100 to move toward the sea side when retracted.

[0058] One end of the wire rope is connected to the swing mechanism tensioning cylinder 201, passes around the fixed pulley block connected to the end of the damping cylinder, and the other end is connected to the traction hinge 206 at the bottom of the reclaiming device 100. The extension and contraction of the tensioning cylinder drives the wire rope to move, thereby pulling the reclaiming device 100 to swing.

[0059] Preferably, the swing mechanism tensioning cylinder 201 is adapted to actively adjust the angle of the retrieving device 100 as required. Preferably, when the retrieving device 100 is acted upon by an external force, the swing mechanism tensioning cylinder 201 does not extend or contract.

[0060] Preferably, the swing reclaiming assembly of this embodiment is preferably used in a ship unloader, wherein the ship unloader extends a boom 601, and the reclaiming device 100 is mounted on the boom 601. Specifically, the reclaiming device 100 is hingedly connected to the boom 601 via a rotating shaft 103, thereby enabling the reclaiming device 100 to swing relative to the boom 601 about the rotating shaft 103. The upper portion of the reclaiming device 100 is hingedly connected to the rotating shaft 103, enabling the reclaiming device 100 to swing about the rotating shaft 103. A traction hinge 206 is provided in the middle or lower middle portion of the reclaiming device 100. The swing mechanism 200 is flexibly connected to the traction hinge 206, specifically via a swing mechanism traction rope 202. This allows the reclaiming device 100 to maintain a first preset position when not subject to external forces. In the first preset position, a perpendicular line passing through the center of gravity of the reclaiming device 100 is spaced from the axis of the rotation axis 103, and the torque of the reclaiming device under the action of gravity causes the reclaiming device to tend to move toward the landward direction. Under the action of its own gravity, the reclaiming device tends to move around the rotation axis 103 and toward the landward direction.

[0061] It should be noted that the vertical line passing through the center of gravity of the material picking device is spaced apart from the axis of the rotating shaft 103, which means that the vertical line passing through the center of gravity of the material picking device does not pass through the axis of the rotating shaft 103, that is, the axis of the rotating shaft 103 and the center of gravity of the material picking device are not on the same straight line in the vertical direction.

[0062] The swing mechanism 200 provides traction to the reclaiming device 100 so that the reclaiming device 100 maintains a first preset position when not subject to external forces. In this position, there is always a torque toward the land side, which is balanced by the pulling force of the swing mechanism 200. When the reclaiming device 100 moves from the sea side to the land side, the gravity of the reclaiming device 100, which weighs tens of tons, can always push the reclaiming device 100 toward the front end of the movement direction, making it easier for the hopper to dig the material from the front. Even if the material is encountered, it can be overcome. When the reclaiming device 100 moves from the land side to the sea side, the tension of the traction wire rope always keeps the posture of the reclaiming device 100 stable.

[0063] If the ship suddenly encounters a surge, if the surge forces the ship and the reclaiming device 100 toward the seaward side, the reclaiming device 100 will tend to swing clockwise. At this point, the surge force applied to the reclaiming device 100 will only reduce the tension in the wire rope. If the surge force exerts a torque on the rotating shaft 103 that exceeds the torque exerted by gravity on the rotating shaft 103, the reclaiming device 100 will swing slightly clockwise, converting the surge force into a swing and preventing the force from being transmitted to the ship unloader structure. If the surge force exerts a force toward the landward side, the reclaiming device 100 will be subjected to the resistance of the reclaiming, gravity, and the tension of the wire rope. The sudden surge force will cause the tension in the wire rope to increase rapidly, and the force on the pulley at the end of the damping cylinder will also increase rapidly. When the threshold is exceeded, the damping cylinder will release, the wire rope length will increase, and the reclaiming device 100 will swing counterclockwise to reach a new equilibrium state. The force applied to the reclaiming device 100 during surge is converted into the swing of the reclaiming device 100, which will not act on the structure of the chain bucket ship unloader, thereby ensuring the safety of the structure under surge.

[0064] The swinging material-grabbing assembly provided in this embodiment pulls the material-grabbing device 100 by the swinging mechanism 200, so that the material-grabbing device 100 is maintained in the first preset position when not subject to external force; and in the first preset position, the vertical line passing through the center of gravity of the material-grabbing device 100 is spaced apart from the axis of the rotating shaft 103, and the torque of the material-grabbing device under the action of gravity makes the material-grabbing device have a tendency to move toward the land side; thereby, the material-grabbing device can use the torque generated by its own gravity to assist in material-grabbing, while avoiding the impact of the material moving with the ship under the action of surge on the material-grabbing arm, avoiding the impact force from being transmitted to the structure of the ship unloader, and ensuring the safety and reliability of the structure.

[0065] Specifically, the swing mechanism 200 further includes a swing mechanism redirecting pulley 203 , which is disposed between the swing mechanism tensioning cylinder 201 and the traction hinge 206 and is in sliding contact with the swing mechanism traction rope 202 .

[0066] Specifically, the swing mechanism 200 further includes a swing mechanism damping cylinder 204 and a damping pulley 205; the damping pulley 205 is connected to the free end of the swing mechanism damping cylinder 204 and is in sliding contact with the swing mechanism traction rope 202; the damping pulley 205 is disposed between the swing mechanism redirecting pulley 203 and the traction hinge 206;

[0067] The rocking mechanism damping cylinder 204 is adapted to extend when the moment applied to the landward direction of the material taking device 100 is greater than a preset threshold, and to retract when the moment applied to the seaward direction of the material taking device 100 is greater than a preset threshold.

[0068] Preferably, the rocking mechanism damping cylinder 204 can extend according to the external force applied to the reclaiming device 100, thereby adjusting the angle of the reclaiming device 100. If the reclaiming device 100 is subjected to a landward torque, the reclaiming device 100 pulls the rocking mechanism traction rope 202. If the force of the rocking mechanism traction rope 202 exceeds a preset threshold of the rocking mechanism damping cylinder 204, the rocking mechanism damping cylinder 204 extends. If the reclaiming device 100 is subjected to a seaward torque, the reclaiming device 100 reduces the force applied to the rocking mechanism traction rope 202, thereby causing the damping cylinder 204 to retract.

[0069] When a surge occurs, the rocking mechanism damping oil cylinder 204 extends or contracts according to the direction of the force. When the surge ends, the force on the rocking mechanism traction rope 202 returns to the state before the surge, and the extension of the rocking mechanism damping oil cylinder 204 will return to the state before the surge. At the same time, the angle of the reclaiming device 100 will also return to the state before the surge. The rocking reclaiming assembly provided in this embodiment is provided with a rocking mechanism damping oil cylinder 204, which extends when the reclaiming device 100 is subjected to a torque toward the land side, and contracts when the reclaiming device 100 is subjected to a torque toward the sea side. Thus, the length of the rocking mechanism traction rope 202 can be automatically adjusted according to the force applied to the reclaiming device 100, so that the reclaiming device 100 can quickly reach a new equilibrium state after being subjected to force, thereby ensuring that the force applied to the reclaiming device 100 during the surge is converted into a rocking motion of the reclaiming device 100, and does not act on the structure of the chain bucket ship unloader, thereby ensuring the safety of the structure under surge.

[0070] Specifically, the rocking mechanism tensioning cylinder 201 is adapted to extend and retract in the horizontal direction.

[0071] Specifically, the rocking mechanism damping cylinder 204 is adapted to extend and retract in the horizontal direction.

[0072] Optionally, the stroke of the tensioning cylinder of the rocking mechanism is greater than the stroke of the damping cylinder of the rocking mechanism.

[0073] Preferably, the force threshold of the swing mechanism tensioning cylinder 201 is greater than the force threshold of the swing mechanism damping cylinder 204 , so that the swing mechanism tensioning cylinder 201 reacts slower than the swing mechanism damping cylinder 204 when subjected to force.

[0074] The swing mechanism tensioning cylinder 201 has a large stroke and a slow response; the swing mechanism damping cylinder 204 has a small stroke and a fast response.

[0075] Specifically, the contraction of the tensioning cylinder 201 of the rocking mechanism is suitable for increasing the angle between the axis of the material taking device 100 along its length direction and the vertical direction;

[0076] The extension of the rocking mechanism tensioning cylinder 201 is suitable for reducing the angle between the axis of the material taking device 100 along its length direction and the vertical direction.

[0077] Since a coaming is provided at the hatch of the cabin, the material below the coaming is difficult to remove when the material taking device 100 is in the normal operating position. Therefore, the swing material taking assembly provided in this embodiment can also drive the material taking device 100 to adjust the angle as needed.

[0078] Under normal operating conditions, the reclaiming device 100 is in a first swinging position 210. When the reclaiming device needs to be adjusted from the first swinging position 210 to the second swinging position 220, the swing mechanism tensioning cylinder 201 extends, and the reclaiming device 100 adjusts to the second swinging position 220 under the action of gravity torque. When the reclaiming device needs to be adjusted from the first swinging position 210 to the third swinging position 230, the swing mechanism tensioning cylinder 201 retracts, and the wire rope pulls the reclaiming device 100 to the third swinging position 230. Adjusting to different positions facilitates the clearing of leftover materials from the hold, reducing the amount of cargo clearance.

[0079] The swing reclaimer assembly provided in this embodiment can drive the reclaimer to swing slightly around the rotary axis 103 by extending and retracting the swing mechanism tensioning cylinder 201. This in turn changes the angle between the longitudinal axis of the reclaimer 100 and the vertical direction, adjusting the reclaimer's posture and allowing it to swing to a certain angle, making it easier to reach corners of the cabin and scoop out materials. This reduces the amount of cabin clearance and improves actual efficiency.

[0080] The ship unloader with a boom lifting system 600 of this embodiment includes a boom 601, a running trolley 13 and the above-mentioned swinging material-grabbing assembly. The running trolley 13 is arranged on the boom 601 and is suitable for moving along the length direction of the boom 601; the swinging material-grabbing assembly is installed on the running trolley 13, and the running direction of the running trolley 13 is parallel to the rotation plane of the material-grabbing device 100.

[0081] Specifically, the swing mechanism tensioning cylinder 201 and the swing mechanism damping cylinder 204 are both fixed on the running trolley 13 ; and the rotary shaft 103 is fixedly provided on the running trolley 13 .

[0082] Specifically, the material taking device 100 is provided with a hopper chain 110 composed of multiple hoppers 111 connected end to end in sequence. The force direction of the hopper chain 110 when digging materials 30 is parallel to the rotation plane of the material taking device 100, and the opening direction of the hopper chain 110 when digging materials 30 is toward the sea side.

[0083] Preferably, the ship unloader is arranged on the dock foundation 40 and extends to the sea side via the boom 601. Preferably, the material taking device 100 is adapted to extend into the cabin 20 to facilitate the excavation of the material 30.

[0084] Preferably, the reclaiming device only reclaims materials in the front direction of the ship width in one movement, and the main loads on the reclaiming device are within the plane where the reclaiming device is located, which is beneficial to extending the life of the equipment and improving efficiency.

[0085] While existing L-shaped chain bucket ship unloaders address environmental issues such as material spillage, the L-shaped chain bucket reclaimer utilizes a horizontally rotating feeding method, which can easily subject the lower end of the chain bucket's vertical arm to significant horizontal forces, leading to excessive torsion of the reclaim arm and the boom's rotating mechanism. Rotary stacking feeding, on the other hand, determines the feed width by three parameters: the chain bucket pitch, the chain speed, and the chain bucket's motion speed. However, these parameters are mutually constrained: too high a speed can affect the feed width, while too slow a speed can affect overall lifting efficiency. Therefore, the rotary reclaiming method limits further efficiency improvements.

[0086] In order to solve the problem that the ship unloader is easily damaged due to unreasonable force and has low unloading efficiency, the material taking device provided in this embodiment includes a chain bucket arm 104, a bucket chain 110, a driving unit and a rotating shaft 103; the bucket chain 110 is composed of multiple buckets 111 connected end to end in sequence, and the bucket chain 110 is arranged around the outer peripheral side of the chain bucket arm 104; the driving unit is suitable for driving the bucket chain 110 to operate relative to the chain bucket arm 104; the rotating shaft 103 is hingedly connected to the chain bucket arm 104, and the chain bucket arm 104 is suitable for swinging around the rotating shaft 103; the force direction of the bucket chain 110 when digging materials 30 is parallel to the rotating plane of the chain bucket arm 104.

[0087] Preferably, the chain bucket arm 104 serves as the main structure of the material taking device and is used to support other structural components. In this embodiment, the chain bucket arm 104 can be a metal frame, which extends along the length direction.

[0088] Preferably, the force direction of the hopper chain 110 when digging the material 30 is the extension direction of the material taking section 150.

[0089] The hopper chain 110 is composed of multiple hoppers 111 connected end to end. The hopper chain 110 is constructed in a loop and is adapted to operate relative to the chain arm 104 under the drive unit. The hopper chain 110 is equipped with multiple hoppers 111. During a reciprocating motion, the hoppers 111 are used to scoop material. After the material is lifted to a certain height, the material 30 is dumped, and then scooping continues, repeating the process. In this embodiment, the material 30 can be coal, but it can also be grains such as corn and wheat, or other substances that can be accommodated in the hoppers 111.

[0090] Preferably, the reclaiming device of this embodiment is preferably used in a ship unloader, in which a boom 601 is extended from the ship unloader, and the chain bucket arm 104 is mounted on the boom 601. Specifically, the chain bucket arm 104 is hingedly connected to the boom 601 via a rotating shaft 103, allowing the chain bucket arm 104 to swing relative to the boom 601 about the rotating shaft 103. Furthermore, the force applied to the bucket chain 110 when scooping material 30 is parallel to the rotation plane of the chain bucket arm 104. This ensures that the reclaiming device does not subject the chain bucket arm 104 to additional forces during operation. When the torsional force of the bucket chain 110 when scooping material 30 is excessive, the chain bucket arm 104 swings freely about the rotating shaft 103 under the force. The primary load on the reclaiming device is within the plane of the reclaiming device, preventing the chain bucket arm 104 from malfunctioning due to excessive force, thereby extending the life of the device and improving efficiency.

[0091] The material-retrieving device provided in this embodiment is configured with a rotating shaft 103 so that the chain bucket arm 104 is suitable for swinging around the rotating shaft 103; and the force direction of the bucket chain 110 when digging materials 30 is parallel to the rotating plane of the chain bucket arm 104, thereby ensuring that the main load on the material-retrieving device is within the plane where the material-retrieving device is located, the force is more reasonable, the operational reliability is improved, and the chain bucket arm 104 is prevented from malfunctioning due to excessive force, which is beneficial to extending the equipment life and improving efficiency.

[0092] Furthermore, the opening direction of the hopper 111 is parallel to the rotation plane of the hopper chain 110, and the opening direction of the hopper 111 is parallel to the rotation plane of the chain bucket arm 104. Furthermore, the opening direction of the hopper 111 is parallel to the translation direction of the material reclaiming device along the arm 601, that is, a front-feeding method is adopted, so that the hopper 111 can shovel the material more directly into the hopper when digging the material, greatly improving the working efficiency. The front-feeding method can also prevent the material from piling up at the head of the reclaiming head, avoiding large lateral excavation resistance.

[0093] Specifically, the rotary shaft 103 is hinged to the upper portion of the chain bucket arm 104;

[0094] A vertical line passing through the center of gravity of the material taking device is spaced apart from the axis of the rotary shaft 103 .

[0095] It should be noted that the vertical line passing through the center of gravity of the reclaiming device is spaced apart from the axis of the rotating shaft 103, which means that the vertical line passing through the center of gravity of the reclaiming device does not pass through the axis of the rotating shaft 103, that is, the axis of the rotating shaft 103 and the center of gravity of the reclaiming device are not in the same straight line in the vertical direction. To maintain this state, this embodiment provides a swing mechanism 200 that is flexibly connected to the traction hinge 206 of the reclaiming device 100; the swing mechanism 200 is suitable for pulling the reclaiming device 100 so that the reclaiming device 100 is maintained in the first preset position when not subject to external forces; in the first preset position, the vertical line passing through the center of gravity of the reclaiming device 100 is spaced apart from the axis of the rotating shaft 103, and the torque of the reclaiming device under the action of gravity causes the reclaiming device to have a tendency to move toward the landward direction.

[0096] The material picking device provided in this embodiment is arranged so that the vertical line passing through the center of gravity of the material picking device is spaced apart from the axis of the rotating shaft 103, so that the material picking device always has a tendency and torque to move toward the front end of the material picking, thereby increasing the pressure of the material picking device on the material. The material picking device can use the torque generated by its own gravity to always maintain a movement trend toward the head of the hopper, which facilitates material picking and reduces energy consumption.

[0097] The material-retrieving device is roughly constructed in a herringbone shape. In the initial position, the center of gravity and the hinge point of the material-retrieving device are not in a straight line, and there is a torque. During excavation operations, the material-retrieving device can use the torque generated by its own gravity to always maintain a movement trend toward the head of the hopper. If it encounters resistance, such as compacted materials, the hopper can rely on its own gravity to always press the head against the compacted materials, thereby increasing the force to break the compacted materials and waiting for the hopper to excavate the materials in front before continuing to move forward, thereby improving the material-retrieving efficiency and reducing additional force. The material-retrieving device can even use its own gravity to complete material retrieving without the need for additional force, thereby reducing energy consumption.

[0098] Specifically, the driving unit includes a driving motor 101 and a driving sprocket 102 ; the outer peripheral side of the driving sprocket 102 is in contact with the hopper chain 110 , and the driving motor 101 is adapted to drive the hopper chain 110 to operate via the driving sprocket 102 .

[0099] Preferably, the output shaft at the end of the driving motor 101 is connected to the driving sprocket 102 after being decelerated, and the driving sprocket 102 is located at the upper part of the material taking device.

[0100] Specifically, the rotation axis of the driving sprocket 102 coincides with the axis of the rotating shaft 103 .

[0101] Specifically, the retrieving device further includes: two tensioning sprockets 108 , which are arranged along the length direction of the chain bucket arm 104 at one end away from the driving sprocket 102 ;

[0102] The two tensioning sprockets 108 are suitable for stretching the hopper chain 110 and forming at least a portion of the hopper chain 110 into a material taking section 150 suitable for contacting the material 30 .

[0103] The two tensioning sprockets 108 are located at the lower part of the material taking device. The two tensioning sprockets 108 can stretch the lower part of the hopper chain 110 so that multiple hoppers can be in an open forward state when running here, thereby facilitating multiple hoppers to take materials at the same time and improving the material taking efficiency.

[0104] Specifically, the retrieving device further includes a tensioning push rod 106 disposed between the two tensioning sprockets 108, adapted to maintain the two tensioning sprockets 108 relatively away from each other to tension the hopper chain 110. This ensures the tension of the hopper chain 110 and maintains the length of the retrieving section 150.

[0105] Specifically, a lifting section 120 suitable for lifting the material 30 is formed between the end of the material taking section 150 and the driving sprocket 102 .

[0106] It should be noted that the end of the reclaiming section 150 refers to the end of the hopper chain 110 in the rotation direction of the hopper chain 110, where the hopper chain 110 maintains contact with the material 30. Correspondingly, the head end of the reclaiming section 150 refers to the head end of the hopper chain 110 in the rotation direction of the hopper chain 110, where the hopper chain 110 maintains contact with the material 30.

[0107] Preferably, the material lifting section 120 in this embodiment is a straight line section. By setting the material lifting section 120 as a straight line section, the hopper is always kept in a straight line, ensuring a stable material lifting process.

[0108] Specifically, after the hopper chain 110 passes around the drive sprocket 102 from the end of the lifting section 120, the direction of the opening of the hopper 111 is changed and the unloading is completed; a first redirecting sprocket 1051 is provided between the driving sprocket 102 and the head end of the material taking section 150; the hopper chain 110 forms a first descending section 130 between the driving sprocket 102 and the first redirecting sprocket 1051, and forms a second descending section 140 between the first redirecting sprocket 1051 and the head end of the material taking section 150; the second descending section 140 is arranged at an angle to the first descending section 130.

[0109] Preferably, by arranging a first redirecting sprocket 1051 between the driving sprocket 102 and the head end of the material-taking section 150, the hopper chain 110 forms a first descending section 130 and a second descending section 140, and the second descending section 140 is set at an angle to the first descending section 130, so that the overall structure of the hopper chain 110 is roughly herringbone-shaped, that is, at the upper part of the material-taking device, the distance between the loaded hopper and the empty hopper is closer, so that the upper structure of the material-taking device is smaller, and at the lower part of the material-taking device, after being redirected by the first redirecting sprocket 1051, the lifting hopper and the descending hopper will move away from each other, and the descending hopper will bend at an angle, so that the lower part of the material-taking device forms a triangle-like shape, which is convenient for setting the material-taking section 150.

[0110] Preferably, by adopting a herringbone-shaped material-retrieving device, a method of feeding from the front of the hopper mouth edge line with a higher force efficiency ratio is adopted. At the bottom of the herringbone structure, in order to allow the material-retrieving arm to dig out materials under the hatch coaming, a material-retrieving section 150 of sufficient length is provided at the bottom of the material-retrieving device, so that the hopper can dig materials at high speed in the ship width direction, and the efficiency is greatly improved.

[0111] Traditional L-shaped reclaiming heads sweep left and right to allow material to enter the hopper. However, deep, narrow reclaiming devices make it difficult to unload cleanly. Furthermore, this rotary feeding method requires the use of an L-shaped reclaiming device in conjunction with a deep, narrow hopper to achieve rotary, stacking, and feeding. The reclaiming device provided in this embodiment utilizes a front reclaiming head with a herringbone structure. Compared to traditional chain bucket ship unloaders, this has a simpler structure, more evenly distributes force across the entire reclaiming device's bottom, and is less expensive.

[0112] Specifically, a second redirecting sprocket 1052 is provided between the driving sprocket 102 and the first redirecting sprocket 1051 , and the hopper chain 110 forms a discharge section 160 between the driving sprocket 102 and the second redirecting sprocket 1052 .

[0113] Preferably, a collecting device such as a funnel can be provided at a relatively lower position of the unloading section 160 to facilitate the subsequent transfer of materials. By providing the unloading section 160, the interference of the empty hopper moving downward with the full hopper that needs to be unloaded can be reduced, thereby ensuring the efficient unloading action.

[0114] Preferably, a dustproof cover 107 is provided outside the hopper chain 110. The hopper is only exposed at the lower part of the material taking device.

[0115] Due to the rotary feeding method used by conventional chain bucket ship unloaders, the chain bucket needs to be deep and narrow to facilitate digging, and deep and narrow chain buckets are not easy to unload cleanly. However, due to the front feeding method, the hopper of this embodiment can be set to a wide and shallow hopper, which is convenient for material entry and discharge.

[0116] The hopper chain 110 is formed by alternating hoppers 111 and connecting plates 112. Ear plates 114 are provided at both ends of the hopper 111. A shaft hole is provided on the ear plates 114. A shaft hole is also provided on the connecting plate 112. The ear plates 114 and the connecting plate 112 are hinged by a pin shaft, thereby connecting all the hoppers together to form a hopper chain.

[0117] The reclaiming mechanism of a traditional bucket chain ship unloader utilizes a chain drive. The reclaiming bucket is mounted between two chains, and a drive mechanism drives the chains, which in turn drives the bucket. This drive method places high demands on the chain's performance. Furthermore, the chain is easily damaged, requiring regular replacement and resulting in high maintenance costs.

[0118] Preferably, in the reclaiming device provided in this embodiment, the hopper back plate 113 of the hopper 111 can directly participate in the transmission, eliminating the traditional chain transmission. Instead, the transmission is driven by a connecting plate and the hopper back plate. The connecting plate connects the hoppers, making the hoppers part of the transmission. The hopper not only serves as the working mechanism for scooping materials, but also participates in the transmission as part of the hopper chain, increasing the force-bearing area and improving reliability.

[0119] Preferably, the driving sprocket and the redirecting sprocket act on a connecting plate, which is connected to a pin on the back plate and is outside the hopper so that it does not interfere with the hopper during driving and redirecting. The connecting plate is made of high-strength material to ensure reliability during driving and redirecting.

[0120] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A ship unloader with a boom lifting system, characterized in that: include: Arm (601); A material taking device, suitable for digging materials, comprising a chain bucket arm, wherein the chain bucket arm is connected to the arm frame (601); A door frame (10), comprising door legs (11), wherein the door legs (11) are arranged on the side of the arm frame (601); The boom lifting system (600) comprises a gear (602), a rack (603) and a driving structure (604), wherein the rack (603) is arranged on the side of the door leg (11) in a vertical direction, and the driving structure (604) is connected to the boom (601); the gear (602) is connected to the output end of the driving structure (604) and meshes with the rack (603); A swinging material-reclaiming assembly comprises a material-reclaiming device (100), a rotary shaft (103) and a swing mechanism (200), wherein the material-reclaiming device (100) is suitable for digging materials (30); the material-reclaiming device (100) is hingedly connected to the arm (601) via the rotary shaft (103), and the material-reclaiming device (100) is suitable for swinging around the rotary shaft (103); a traction hinge (206) between the swing mechanism (200) and the material-reclaiming device (100) The swaying mechanism (200) is flexibly connected, and is suitable for pulling the material-retrieving device (100) so that the material-retrieving device (100) is maintained at a first preset position when not subjected to external force; when in the first preset position, a vertical line passing through the center of gravity of the material-retrieving device (100) is spaced apart from the axis of the rotary shaft (103), and the torque of the material-retrieving device (100) under the action of gravity causes the material-retrieving device (100) to have a tendency to move toward the land side.

2. The ship unloader with a boom lifting system according to claim 1, characterized in that: The boom lifting system (600) further includes a reducer (605), and the gear (602) is connected to the output end of the driving structure (604) via the reducer (605).

3. The ship unloader with a boom lifting system according to claim 2, characterized in that: The driving structure (604) is a driving motor.

4. The ship unloader with a boom lifting system according to claim 2 or 3, characterized in that: The rack (603) is arranged on the side of the door leg (11) facing the arm (601).

5. The ship unloader with a boom lifting system according to claim 4, characterized in that: The driving structure (604) and the speed reducer (605) are both connected to the top of the arm (601), and the gear (602) is located above the arm (601).

6. The ship unloader with a boom lifting system according to claim 5, characterized in that: There are four door legs (11), which are distributed in a rectangular shape on both sides of the arm (601), and each door leg (11) is provided with the rack (603).

7. The ship unloader with a boom lifting system according to claim 6, characterized in that: The arm lifting system (600) further comprises a locking structure (606), wherein the locking structure (606) is connected to the arm (601) and is used to lock the arm (601) at a corresponding height of the door leg (11).

8. The ship unloader with a boom lifting system according to claim 7, characterized in that: A locking structure (606) is provided on both sides of at least one of the door legs (11), respectively, for clamping the door leg (11) from both sides of the door leg (11).

9. The ship unloader with a boom lifting system according to claim 8, characterized in that: A locking structure (606) is provided on both sides of each door leg (11).

10. The ship unloader with a boom lifting system according to any one of claims 7 to 9, characterized in that: The locking structure (606) is a hydraulic cylinder and / or a rail clamp.

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