Ship unloader with counterweight system

Abstract

The present invention relates to the technical field of port equipment, and in particular to a ship unloader with a balanced counterweight system, comprising a gantry, an arm, an arm lifting system, a material taking device and a balanced counterweight system, wherein the gantry comprises a gantry leg, the arm lifting system is suitable for controlling the arm to move up and down along the gantry leg, the material taking device is suitable for digging materials, and comprises a chain bucket arm, wherein the chain bucket arm is slidably connected to the arm; the balanced counterweight system comprises a counterweight trolley and a first driving structure, wherein the counterweight trolley is slidably connected to the arm, and the first driving structure is suitable for driving the counterweight trolley to move according to the position of the chain bucket arm on the arm. The ship unloader with a balanced counterweight system provided by the present invention adjusts the center position of the arm through the balanced counterweight system.

Description

Technical Field

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

[0002] Chain bucket ship unloaders have a long history of application in bulk cargo unloading terminals at ports, and chain bucket ship unloaders have outstanding environmental advantages. Traditional chain bucket ship unloaders generally adopt a portal structure, with the chain bucket arm fixed at the front end of the boom, and the movement of the chain bucket arm is achieved through the rotation of the boom and the pitching of the boom. However, when adjusting the position of the chain bucket arm, the traditional chain bucket ship unloader requires the slewing mechanism, the pitching mechanism and the chain bucket arm lifting mechanism to work together to adjust. The adjustment method is relatively complicated and cumbersome, which makes the efficiency of the whole machine unloading ship low. Especially when the position is adjusted significantly in the depth direction of the ship, the pitching mechanism and the chain bucket arm lifting mechanism need to work together to complete the adjustment, which seriously affects the efficiency of the whole machine unloading ship. 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 multiple structures to be completed together, resulting in low ship unloading efficiency, thereby providing a ship unloader with a balanced counterweight system that improves the ship unloading efficiency.

[0004] In order to solve the above problems, the present invention provides a ship unloader with a balanced counterweight system, including a gantry, a boom, a boom lifting system, a material taking device and a balanced counterweight system, the gantry includes gantry legs, the boom lifting system is suitable for controlling the boom to move up and down along the gantry legs, the material taking device is suitable for digging materials, including a chain bucket arm, and the chain bucket arm is slidably connected to the boom; the balanced counterweight system includes a counterweight trolley and a first drive structure, the counterweight trolley is slidably connected to the boom, and the first drive structure is suitable for driving the counterweight trolley to move according to the position of the chain bucket arm on the boom.

[0005] Optionally, the boom includes two main beams and at least one cross beam, the two main beams are parallel and spaced apart, and both ends of the cross beam are vertically connected to the two main beams respectively; the chain bucket arm and the counterweight trolley are both movably connected to the main beams and are located between the two main beams.

[0006] Optionally, the balancing weight system further includes:

[0007] There are two counterweight rails, which are respectively arranged on the two main beams;

[0008] The counterweight frame is fixedly connected to the counterweight trolley; and the two sides of the counterweight frame are movably connected to the two counterweight rails respectively.

[0009] Optionally, the first driving structure includes:

[0010] A first drive motor connected to the counterweight frame;

[0011] The first counterweight wheel is rotatably connected to both sides of the counterweight frame and connected to the power output end of the first drive motor. The first counterweight wheel is rotatably arranged on the counterweight track.

[0012] Optionally, the counterweight trolley comprises:

[0013] car;

[0014] A first counterweight block is movably disposed in the carriage;

[0015] The second driving structure is arranged on the carriage and is suitable for driving the first counterweight to move along the length direction of the cross beam.

[0016] Optionally, the second driving structure includes:

[0017] A driving motor connected to the wall of the carriage;

[0018] A screw rod has one end connected to the power output end of the driving motor and the other end extending in a direction parallel to the crossbeam; a threaded hole is provided on the first counterweight block, and the threaded hole cooperates with the thread of the screw rod.

[0019] Optionally, the second driving structure further comprises a fixed bearing, which is connected to the wall of the carriage and arranged opposite to the driving motor, and one end of the screw rod away from the driving motor is rotatably connected to the fixed bearing.

[0020] Optionally, the counterweight trolley further includes a second counterweight wheel, and the second counterweight wheel is rotatably connected to the bottom of the first counterweight block.

[0021] Optionally, the boom lifting system comprises:

[0022] A traction mechanism, arranged on the arm;

[0023] A pulley assembly, comprising a first pulley and a second pulley, wherein the first pulley is connected to the top of the door frame, and the second pulley is connected to the arm frame;

[0024] A transmission member, one end of which is connected to the traction mechanism, and the other end of which is connected to the arm after passing through the second pulley and the first pulley;

[0025] The energy-saving structure is connected to the arm and is used to balance the weight of the arm.

[0026] Optionally, the pulley assembly further includes a third pulley, the third pulley is connected to the top of the door frame, and the energy-saving structure includes:

[0027] A second counterweight;

[0028] An energy-saving rope has one end connected to the arm support and the other end passing around the third pulley and connected to the second counterweight block.

[0029] The present invention has the following advantages:

[0030] 1. The ship unloader with a balanced counterweight system provided by the present invention realizes the overall lifting of the boom through the boom lifting system, and can conveniently adjust the height of the boom and the chain bucket arm in a wide range, greatly improving the overall loading and unloading efficiency, and effectively improving the safety of the ship unloader in extreme weather. The balanced counterweight system can adjust the position of the counterweight trolley according to the position of the chain bucket arm on the boom, so as to adjust the center of gravity of the boom to the center position of the projection of the door frame on the boom, prevent the door legs from being subjected to lateral pressure, and also prevent the boom from being skewed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of a ship unloader with a counterweight system according to the present invention is shown;

[0033] Figure 2 A schematic diagram of a balancing weight system of the present invention is shown;

[0034] Figure 3 A schematic diagram of the boom lifting system of the present invention is shown;

[0035] Figure 4 A partial schematic diagram of the boom lifting system of the present invention is shown;

[0036] Figure 5 Shows Figure 4 A magnified view of part A;

[0037] Figure 6 Shows Figure 4 Bottom view of

[0038] Figure 7 It is a schematic diagram of the material taking device of the present invention;

[0039] Figure 8 for Figure 7 Local zoom in Figure 1 ;

[0040] Fig. 9 for Figure 7 Local zoom in Figure 2 ;

[0041] Fig.10 It is a schematic diagram of the coordination state between the swing mechanism and the material taking device of the present invention;

[0042] Fig.11 It is a schematic diagram of multiple swing position states of the material taking device of the present invention;

[0043] Fig.12 It is a partial schematic diagram of the hopper chain of the present invention;

[0044] Fig.13 It is a schematic diagram of the hopper of the present invention.

[0045] Description of reference numerals:

[0046] 10. gantry; 11. gantry legs; 1101. guide rails; 13. running trolley; 14. beam; 20. cabin; 30. materials; 40. dock foundation;

[0047] 100, material taking device; 101, third driving motor; 102, driving sprocket; 103, rotating shaft; 104, chain bucket arm; 1051, first redirecting sprocket; 1052, second redirecting sprocket; 106, tensioning push rod; 107, cover; 108, tensioning sprocket; 110, bucket chain; 111, bucket; 112, connecting plate; 113, bucket back plate; 114, ear plate;

[0048] 120, material lifting section; 130, first descending section; 140, second descending section; 150, material taking section; 160, material unloading section;

[0049] 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;

[0050] 210, first swing state; 220, second swing state; 230, third swing state;

[0051] 600, boom lifting system; 601, boom; 6011, connecting seat; 6012, main beam; 602, traction mechanism; 603, pulley assembly; 6031, first pulley; 6032, second pulley; 6033, third pulley; 604, transmission member; 605, rolling structure; 6051, roller; 6052, elastic damping member; 606, locking structure; 607, energy-saving structure; 6071, second counterweight block; 6072, energy-saving rope;

[0052] 700, balancing counterweight system; 701, counterweight trolley; 7011, carriage; 7012, first counterweight block; 7013, second drive motor; 7014, screw; 7015, fixed bearing; 7016, second counterweight wheel; 702, first drive motor; 703, first counterweight wheel; 704, counterweight track; 705, counterweight frame. DETAILED DESCRIPTION

[0053] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0055] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] 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.

[0057] like Figures 1 to 13As shown, this embodiment discloses a ship unloader with a counterweight system 700, including a gantry 10, a boom 601, a boom lifting system 600, a material taking device and a counterweight system 700, wherein the gantry 10 includes a gantry leg, the boom lifting system 600 is suitable for controlling the boom 601 to move up and down along the gantry leg, the material taking device is suitable for digging materials, and includes a chain bucket arm, and the chain bucket arm is slidably connected to the boom 601; the counterweight system 700 includes a counterweight trolley 701 and a first drive structure, the counterweight trolley 701 is slidably connected to the boom 601, and the first drive structure is suitable for driving the counterweight trolley 701 to move according to the position of the chain bucket arm on the boom 601.

[0058] The boom lifting system 600 can realize the overall lifting of the boom 601, and the height of the boom 601 and the chain bucket arm can be conveniently adjusted in a wide range, which greatly improves the overall loading and unloading efficiency and effectively improves the safety of the ship unloader in extreme weather. The counterweight system 700 can adjust the position of the counterweight trolley 701 according to the position of the chain bucket arm on the boom 601, so as to adjust the center of gravity of the boom 601 to the center position of the projection of the gantry 10 on the boom 601, so as to prevent the gantry legs from being subjected to lateral pressure and prevent the boom 601 from being skewed.

[0059] In this embodiment, the arm 601 includes two main beams 6012 and at least one cross beam, the two main beams 6012 are parallel and spaced apart, and the two ends of the cross beam are respectively vertically connected to the two main beams 6012; the chain bucket arm and the counterweight trolley 701 are both movably connected to the main beams 6012 and are located between the two main beams 6012. A space is formed between the two cross beams to facilitate the movement of the chain bucket arm and the counterweight trolley 701, and the cross beam and the two main beams 6012 are connected to form an arm 601.

[0060] In this embodiment, the balancing counterweight system 700 further includes a counterweight rail 704 and a counterweight frame 705. The counterweight rail 704 has two rails, which are respectively arranged on the two main beams 6012; the counterweight frame 705 is fixedly connected to the counterweight trolley 701; and the two sides of the counterweight frame 705 are respectively movably connected to the two counterweight rails 704. In a specific embodiment, the counterweight frame 705 is connected to the top of the counterweight trolley 701; or the counterweight frame 705 is connected to the bottom of the counterweight trolley 701. The shape of the counterweight frame 705 matches the shape of the counterweight trolley 701, and the two sides of the counterweight frame 705 extend out to the two main beams 6012 respectively, and are movably connected to the counterweight rail 704. The counterweight frame 705 can be welded to the counterweight trolley 701, or it can be detachably connected to the counterweight trolley 701 through fasteners.

[0061] In this embodiment, the first driving structure includes a first driving motor 702 and a first counterweight wheel 703; the first driving motor 702 is connected to the counterweight frame 705; the first counterweight wheel 703 is rotatably connected to both sides of the counterweight frame 705 and connected to the power output end of the first driving motor 702, and the first counterweight wheel 703 is rotatably arranged on the counterweight track 704. The first driving motor 702 drives the first counterweight wheel 703 to rotate, and the first counterweight wheel 703 rotates and moves on the counterweight track 704. Preferably, the first counterweight wheel 703 is a gear, and the counterweight track 704 is provided with a rack.

[0062] In a specific embodiment, the main beam 6012 is a columnar structure with a rectangular cross section, and the counterweight track 704 is arranged on the top side of the rectangle. Alternatively, the main beam 6012 is a columnar structure with a quadrilateral cross section, and the opposite sides of the two main beams 6012 are hypotenuses, and the counterweight track 704 is arranged on the hypotenuses. Preferably, the main beam 6012 is a columnar structure with a trapezoidal cross section, and the short side of the trapezoid is arranged at the top, and the counterweight track 704 is arranged on the opposite hypotenuses of the two main beams 6012.

[0063] In this embodiment, the counterweight trolley 701 includes a carriage 7011, a first counterweight block 7012 and a second driving structure; the first counterweight block 7012 is movably arranged in the carriage 7011; the second driving structure is arranged on the carriage 7011, suitable for driving the first counterweight block 7012 to move along the direction of the beam.

[0064] When the ship unloader is performing ship unloading operations, if the weights of the two sides of the material taking device along the length direction of the main beam 6012 are unequal, resulting in unbalanced force on the two main beams 6012, the center of gravity of the entire boom 601 will be pulled to one side. Under the action of the second driving structure, the first counterweight block 7012 moves along the length direction of the beam to balance the center of gravity of the entire boom 601 and prevent the boom 601 from tilting and damage such as collision and friction caused by the tilting.

[0065] In this embodiment, the second driving structure includes a second driving motor 7013 and a screw rod 7014. The second driving motor 7013 is connected to the compartment wall of the compartment 7011. One end of the screw rod 7014 is connected to the power output end of the second driving motor 7013, and the other end extends in a direction parallel to the crossbeam. The first counterweight block 7012 is provided with a threaded hole, and the threaded hole is threadedly matched with the screw rod 7014. The power output end of the second driving motor 7013 drives the screw rod 7014 to rotate, and the first counterweight block 7012 connected to the screw rod 7014 can move in the compartment 7011 along the axial direction of the screw rod 7014 under the drive of the screw rod 7014 because it is threadedly matched with the screw rod 7014.

[0066] In this embodiment, the second driving structure further includes a fixed bearing 7015, which is connected to the wall of the carriage 7011 and is disposed opposite to the driving motor, and one end of the screw rod 7014 away from the driving motor is rotatably connected to the fixed bearing 7015. The fixed bearing 7015 rotatably supports the screw rod 7014 at the other end of the screw rod 7014 to prevent the screw rod 7014 from being compressed and deformed axially.

[0067] In this embodiment, the counterweight trolley 701 further includes a second counterweight wheel 7016, which is rotatably connected to the bottom of the first counterweight block 7012. The counterweight trolley 701 and the bottom of the carriage 7011 are rolled to reduce the movement friction of the first counterweight block 7012, and the first counterweight block 7012 can also be supported.

[0068] In this embodiment, the boom lifting system 600 includes a traction mechanism 602, a pulley assembly 603, a transmission member 604 and an energy-saving structure 607, the traction mechanism 602 is arranged on the boom 601; the pulley assembly 603 includes a first pulley 6031 and a second pulley 6032, the first pulley 6031 is connected to the top of the door leg, and the second pulley 6032 is connected to the boom 601; one end of the transmission member 604 is connected to the traction mechanism 602, and the other end is connected to the boom 601 after bypassing the second pulley 6032 and the first pulley 6031; the energy-saving structure 607 is connected to the boom 601, and is used to balance the weight of the boom 601.

[0069] The first pulley 6031 is arranged at the top of the door leg to generate a height difference, which is convenient for controlling the lifting and lowering of the arm frame 601. The second pulley 6032 is a movable pulley, which reduces the pressure on the transmission member 604, making the lifting and lowering of the arm frame 601 more convenient. In a specific embodiment, the arm frame 601 is provided with a convex column extending upward, and the second pulley 6032 is arranged on the convex column, which reduces the length of the transmission member 604. The energy-saving structure 607 balances the effective weight of the arm frame 601 when it is lifted, which can effectively reduce the installed capacity of the electrode in the traction mechanism 602, reduce the energy consumption of lifting and lowering the arm frame 601, and achieve energy-saving effects.

[0070] In this embodiment, the pulley assembly 603 also includes a third pulley 6033, which is connected to the top of the door leg. The energy-saving structure 607 includes a second counterweight block 6071 and an energy-saving rope 6072; one end of the energy-saving rope 6072 is connected to the arm 601, and the other end bypasses the third pulley 6033 and is connected to the second counterweight block 6071.

[0071] When the boom 601 rises under the control of the boom lifting system 600, the second counterweight 6071 falls, and the second counterweight 6071 balances the effective weight of the boom 601 when it is lifted, which can effectively reduce the installed capacity of the motor in the traction mechanism 602, reduce the energy consumption of the boom 601 when it is lifted, and achieve energy saving. When the boom 601 falls under the control of the boom lifting system 600, the second counterweight 6071 rises, balances the effective weight of the boom 601 when it is lowered, slows down the lowering speed of the boom 601, effectively reduces the installed capacity of the motor in the traction mechanism 602, reduces the energy consumption of the boom 601 when it is lowered, and achieves energy saving. In a preferred embodiment, the weight of the second counterweight 6071 is close to the total weight of the boom 601 when it is unloaded, and the effective weight of the boom 601 when it is lifted is reduced by the mutual offset relationship between the second counterweight 6071 and the boom 601.

[0072] In this embodiment, the pulley assembly 603 and the transmission member 604 are provided in multiple groups, and each door leg 11 is matched with a group of the pulley assembly 603. The traction mechanism 602 may have one group, and one group of traction mechanisms 602 simultaneously controls the pulley assemblies 603 near four door legs 11; or, the traction mechanism 602 may also have two groups, and one group of traction mechanisms 602 simultaneously controls the pulley assemblies 603 near two door legs 11.

[0073] In this embodiment, the transmission member 604 is a steel wire rope.

[0074] In a specific implementation, when the ship unloader is working, when the chain bucket arm 104 trolley needs to operate in a deep cabin or needs to be greatly lifted or lowered in the ship depth direction due to water level changes, the arm lifting system 600 is used to lift or lower the chain bucket arm 104, the chain bucket arm 104 trolley and the arm 601 as a whole.

[0075] In this embodiment, the top of the door leg 11 is connected with a cross beam 14, the first pulley 6031 is connected to the bottom of the cross beam 14, and there are two third pulleys 6033, which are respectively connected to the two ends of the top of the cross beam 14, and the third pulley 6033 close to the second counterweight 6071 extends from the cross beam 14 to the side of the door leg 11. The third pulley 6033 close to the second counterweight 6071 extends to the side of the door leg 11, and the second counterweight 6071 bypassing the third pulley 6033 can hang on the side of the door leg 11 under the action of gravity, and there is a gap between the second counterweight 6071 and the door leg 11, so as to prevent the second counterweight 6071 from being attached to the door leg 11, rubbing against the door leg 11 to generate noise and damage the door leg 11.

[0076] In a preferred embodiment, the first pulley 6031 and the third pulley 6033 are staggered with each other in the vertical direction to prevent the transmission member 604 from rubbing or entangled with the energy-saving rope 6072 .

[0077] The ship unloader with the boom lifting system 600 of this embodiment further includes a rolling structure 605, one end of which is connected to the boom 601, and the other end of which is rollingly matched with the door leg 11. The rolling structure 605 is provided to reduce the friction between the door leg 11 and the bracket and reduce the noise, and can also guide the lifting direction of the boom 601 along the direction of the door leg 11.

[0078] In this embodiment, the rolling structure 605 includes a roller 6051, which is connected to the arm frame 601 and rolls with the door leg 11. In a specific embodiment, the rolling structure 605 also includes a rolling frame, which is arranged on the arm frame 601, and the roller 6051 is connected to the rolling frame.

[0079] In this embodiment, the rolling structure 605 further includes an elastic damping member 6052, and the roller 6051 is connected to the arm 601 via the elastic damping member 6052. The elastic damping member 6052 can reduce the influence of vibration of the roller 6051 during rolling on the arm 601.

[0080] In this embodiment, the side of the door leg 11 facing the arm 601 is the first side, and the two sides adjacent to the first side are the second side. At least one guide rail 1101 is provided on the first side and the second side, and the roller 6051 is suitable for lifting and lowering along the guide rail 1101.

[0081] The guide rail 1101 is used to guide the roller 6051 to prevent the roller 6051 from derailing and affecting the lifting of the arm 601. Specifically, the guide rail 1101 includes a guide bar and a guide groove arranged on the guide bar, and the guide wheel is suitable for moving along the guide groove.

[0082] In this embodiment, the arm 601 is provided with spaced connection seats 6011, and each of the door legs 11 is provided with one connection seat 6011 on both sides, and each of the connection seats 6011 is connected to at least one set of rolling structures 605 at one end facing the second side surface. The connection seats 6011 are respectively located on both sides of the door leg 11, and limit and guide the door leg 11 on both sides.

[0083] The ship unloader with the boom lifting system 600 of this embodiment further includes a locking structure 606. Each of the connecting seats 6011 is provided with the locking structure 606, and the locking structure 606 is used to lock the boom 601 at a corresponding height. In one preferred embodiment, the locking structure 606 can be a hydraulic cylinder. In another preferred embodiment, the locking structure 606 can be a rail clamp.

[0084] In this embodiment, before the arm 601 is raised or lowered, the locking structure 606 is released, and the transmission member 604 tows the arm 601 under the drive of the traction mechanism 602. The roller 6051 rolls on the surface of the door leg 11, and the elastic damping member 6052 can reduce the impact of vibration during the rolling process on the arm 601. When it is pulled into place and the arm 601 rises or falls to a suitable height, the locking structure 606 clamps the door leg 11 from both sides to fix the height position of the arm 601, and the lifting process ends.

[0085] The ship unloader with the boom lifting system 600 of this embodiment also includes a swinging material picking assembly, including a material picking device 100, a rotating shaft 103 and a swinging mechanism 200, wherein the material picking device 100 is suitable for digging materials 30; the rotating shaft 103 is hingedly connected to the material picking device 100, and the material picking 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 picking device 100; the swinging mechanism 200 is suitable for pulling the material picking device 100 so that the material picking device 100 is maintained in a first preset position when not subject to external force; and in the first preset position, a vertical line passing through the center of gravity of the material picking device 100 is spaced apart from the axis of the rotating shaft 103, and the torque of the material picking device under the action of gravity makes the material picking device have a tendency to move toward the land side.

[0086] Preferably, the material taking device 100 includes a hopper chain 110 composed of a plurality of hoppers 111 connected end to end in sequence, and the hopper chain 110 reciprocates in a loop so as to use the hoppers 111 to scoop out the material 30. The specific structural form of the material taking device is described in detail below.

[0087] 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 picking device 100 toward the land side when extended, and driving the material picking device 100 to move toward the sea side when retracted.

[0088] One end of the wire rope is connected to the tensioning cylinder 201 of the swing mechanism, and after passing through the fixed pulley block connected to the end of the damping cylinder, the other end is connected to the traction hinge 206 at the bottom of the material taking device 100. The extension and contraction of the tensioning cylinder drives the wire rope to move, thereby pulling the swing of the material taking device 100.

[0089] Preferably, the swing mechanism tensioning cylinder 201 is suitable for actively adjusting the angle of the material taking device 100 as needed. Preferably, when the material taking device 100 is subjected to an external force, the swing mechanism tensioning cylinder 201 does not extend or contract with the movement.

[0090] Preferably, the swinging material taking assembly of this embodiment is preferably applied to a ship unloader, the ship unloader extends a boom 601, and the material taking device 100 is installed on the boom 601. Specifically, the material taking device 100 is hingedly connected to the boom 601 through a rotating shaft 103, so that the material taking device 100 can swing relative to the boom 601 around the rotating shaft 103. The upper part of the material taking device 100 is hingedly connected to the rotating shaft 103, so that the material taking device 100 is suitable for swinging around the rotating shaft 103. A traction hinge 206 is provided in the middle or lower middle part of the material-retrieving device 100, and the swing mechanism 200 is flexibly connected to the traction hinge 206, specifically, the traction rope 202 of the swing mechanism is connected to the traction hinge 206, so that the material-retrieving device 100 is maintained at the first preset position when not subjected to external force; in the first preset position, the vertical line passing through the center of gravity of the material-retrieving device 100 is spaced from the axis of the rotating shaft 103, and the moment of the material-retrieving device under the action of gravity makes the material-retrieving device have a tendency to move toward the land side. Under the action of its own gravity, the material-retrieving device has a tendency to move around the rotating shaft 103 and toward the land side.

[0091] 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.

[0092] The swing mechanism 200 provides traction to the material taking device 100, so that the material taking device 100 is maintained at the first preset position when not subject to external force. At this position, there is always a torque toward the land side, and this torque is balanced by the pulling force of the swing mechanism 200. When the material taking device 100 moves from the sea side to the land side, relying on the gravity of the material taking device 100 weighing tens of tons, the material taking device 100 can always be pushed to the front end of the movement direction, which is convenient for the hopper to dig the material from the front, even if the material taking encounters certain resistance, it can be overcome. When the material taking device 100 moves from the land side to the sea side, relying on the pulling force of the traction wire rope, the posture of the material taking device 100 is always kept stable.

[0093] When the cabin suddenly encounters a surge, in the ship width direction, if the force applied by the surge to the ship and the reclaiming device 100 is toward the sea side, the reclaiming device 100 will tend to swing clockwise. At this time, the force of the surge applied to the reclaiming device 100 will only reduce the tension of the wire rope. If the moment of the surge force on the rotating shaft 103 exceeds the moment of the gravity on the rotating shaft 103, the reclaiming device 100 will swing slightly clockwise to transform the surge force into a swing to avoid transmitting the force to the ship unloader structure. If the force applied by the surge to the ship and the reclaiming device 100 is toward the land side, the reclaiming device 100 is subject to the material resistance, gravity and wire rope tension, and is suddenly subject to the surge force, which will rapidly increase the tension of the wire rope. At this time, the force on the pulley at the end of the damping oil cylinder will also rapidly increase. When it exceeds the threshold, the damping oil cylinder is released, the length of the wire rope increases, and the reclaiming device 100 swings 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, and will not act on the structure of the chain bucket ship unloader, thereby ensuring the safety of the structure under surge.

[0094] The swinging material-grabbing assembly provided in the present 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 subjected 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 utilize 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.

[0095] 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 .

[0096] Specifically, the swing mechanism 200 further includes a swing mechanism damping oil cylinder 204 and a damping pulley 205; the damping pulley 205 is connected to the free end of the swing mechanism damping oil cylinder 204 and is in sliding contact with the swing mechanism traction rope 202; the damping pulley 205 is arranged between the swing mechanism redirecting pulley 203 and the traction hinge 206;

[0097] The rocking mechanism damping cylinder 204 is adapted to extend when the moment applied to the material taking device 100 in the landward direction is greater than a preset threshold, and to contract when the material taking device 100 is applied to the seaward direction.

[0098] Preferably, the swing mechanism damping cylinder 204 can follow the extension amount according to the external force applied to the material taking device 100, thereby adjusting the angle of the material taking device 100. If the material taking device 100 is subjected to a torque in the landward direction, the material taking device 100 pulls the swing mechanism traction rope 202, and if the force of the swing mechanism traction rope 202 is greater than the preset threshold of the swing mechanism damping cylinder 204, the swing mechanism damping cylinder 204 extends; if the material taking device 100 is subjected to a torque in the seaward direction, the material taking device 100 reduces the force applied to the swing mechanism traction rope 202, thereby causing the damping cylinder to contract.

[0099] When a surge occurs, the swing mechanism damping oil cylinder 204 extends or contracts according to the force direction. When the surge ends, the force on the swing mechanism traction rope 202 is restored to the state before the surge, and the extension of the swing mechanism damping oil cylinder 204 will be restored to the state before the surge, and the angle of the material picking device 100 will also be restored to the state before the surge. The swing material picking assembly provided in this embodiment is provided with a swing mechanism damping oil cylinder 204, and extends when the material picking device 100 is subjected to a torque in the landward direction, and contracts when the material picking device 100 is subjected to a torque in the seaward direction; thus, the length of the swing mechanism traction rope 202 can be adjusted automatically according to the force condition of the material picking device 100, so that the material picking device 100 can quickly reach a new equilibrium state after being subjected to force, and ensure that the force applied to the material picking device 100 during the surge is converted into the swinging action of the material picking device 100, and will not act on the structure of the chain bucket ship unloader, thereby ensuring the safety of the structure under the surge.

[0100] Specifically, the rocking mechanism tensioning cylinder 201 is suitable for extending and retracting in the horizontal direction.

[0101] Specifically, the rocking mechanism damping cylinder 204 is suitable for extending and retracting in the horizontal direction.

[0102] Optionally, the stroke of the tensioning cylinder of the rocking mechanism is greater than the stroke of the damping cylinder of the rocking mechanism.

[0103] 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 reaction of the swing mechanism tensioning cylinder 201 when subjected to force is slower than that of the swing mechanism damping cylinder 204 .

[0104] 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.

[0105] Specifically, the contraction of the swing mechanism tensioning cylinder 201 is suitable for increasing the angle between the axis of the material picking device 100 along its length direction and the vertical direction; the extension of the swing mechanism tensioning cylinder 201 is suitable for reducing the angle between the axis of the material picking device 100 along its length direction and the vertical direction.

[0106] Since a coaming is provided at the hatch of the cabin, the material below the coaming is difficult to be taken out 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.

[0107] Under normal working conditions, the material taking device 100 is at an angle of the first swing state 210. When the material taking device needs to be adjusted from the first swing state 210 to the second swing state 220, the swing mechanism tensioning cylinder 201 extends, and the material taking device 100 can be adjusted to the second swing state 220 under the action of gravity torque. When it is necessary to adjust from the first swing state 210 to the third swing state 230, the swing mechanism tensioning cylinder 201 retracts, and the wire rope pulls the material taking device 100 to adjust to the third swing state 230. By adjusting different postures, it is convenient to empty the cabin scraps and reduce the amount of cabin cleaning.

[0108] The swing material taking assembly provided in this embodiment can drive the material taking device to swing slightly around the rotating shaft 103 by extending and retracting the swing mechanism tensioning cylinder 201, thereby changing the angle between the axis of the material taking device 100 along its length direction and the vertical direction, adjusting the posture of the material taking device, and making the material taking device swing to a certain angle, so as to facilitate entering the corner of the cabin to dig materials, thereby reducing the amount of cabin cleaning and improving the actual use efficiency.

[0109] 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, wherein 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.

[0110] 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 disposed on the running trolley 13 .

[0111] Specifically, the material taking device 100 is provided with a hopper chain 110 formed by 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.

[0112] Preferably, the ship unloader is arranged on the dock foundation 40 and extends to the sea side through the arm 601. Preferably, the material taking device 100 is suitable for extending into the cabin 20 to facilitate the excavation of the material 30.

[0113] Preferably, the material taking device only takes material in the front direction of the ship width in one movement, and the main loads on the material taking device are within the plane where the material taking device is located, which is beneficial to extending the life of the equipment and improving the efficiency.

[0114] Although the L-type chain bucket ship unloader in the prior art solves environmental problems such as material spillage, the L-type chain bucket reclaiming head adopts a horizontal rotation feeding method, which easily causes the lower end of the chain bucket vertical arm to bear a large horizontal force, and is prone to excessive torsion of the reclaiming arm, thereby causing failures of the reclaiming arm revolving mechanism and the arm frame revolving mechanism. In the rotary stacking feeding method, the feeding width is jointly determined by three parameters: the chain bucket pitch, the chain speed, and the chain bucket movement speed. However, these parameters also restrict each other. Too fast speed will affect the feeding width, and too slow speed will affect the overall lifting efficiency. Therefore, the rotary reclaiming method limits the further improvement of efficiency.

[0115] In order to solve the problem that the ship unloader is easily damaged due to unreasonable force and has low ship 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 a plurality of 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.

[0116] 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 extending along the length direction.

[0117] Preferably, the force direction of the hopper chain 110 when digging the material 30 is the extension direction of the material taking section 150 .

[0118] The hopper chain 110 is formed by connecting a plurality of hoppers 111 in sequence end to end. The hopper chain 110 is constructed in a ring shape and is suitable for operating relative to the chain bucket arm 104 under the drive of the driving unit. The hopper chain 110 is provided with a plurality of hoppers 111, so that during the reciprocating motion, the hoppers 111 are used to dig materials, and after the materials are lifted to a certain height, the materials 30 are dumped, and then the materials are continued to be dug, and so on. In this embodiment, the material 30 can be coal, and can also be grains such as corn and wheat, or other substances that can be accommodated in the hopper 111.

[0119] Preferably, the reclaiming device of this embodiment is preferably applied to a ship unloader, the ship unloader extends an arm 601, and the chain bucket arm 104 is installed on the arm 601. Specifically, the chain bucket arm 104 is hingedly connected to the arm 601 through a rotating shaft 103, so that the chain bucket arm 104 can swing relative to the arm 601 around the rotating shaft 103. Furthermore, the force direction of the bucket chain 110 when digging materials 30 is parallel to the rotating plane of the chain bucket arm 104, so that when the reclaiming device is working, the chain bucket arm 104 itself will not be subjected to additional force, and when the torsional force of the bucket chain 110 when digging materials 30 is too large, the chain bucket arm 104 will swing freely around the rotating shaft 103 under the action of the force, and the main loads on the reclaiming device are all within the plane where the reclaiming device is located, avoiding the chain bucket arm 104 from being overstressed and malfunctioning, which is conducive to extending the life of the equipment and improving efficiency.

[0120] The material taking device provided in this embodiment is provided 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 loads on the material taking device are within the plane where the material taking device is located, the force is more reasonable, the operating reliability is improved, and the chain bucket arm 104 is prevented from malfunctioning due to excessive force, which is beneficial to extending the life of the equipment and improving efficiency.

[0121] 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 taking device along the arm frame 601, that is, the front feeding method is adopted, so that the hopper 111 can shovel the material into the hopper more directly when digging the material, and the working efficiency is greatly improved. The front feeding method can also avoid the material from being piled up on the head of the material taking head, and avoid the large lateral excavation resistance.

[0122] Specifically, the rotary shaft 103 is hinged to the upper portion of the chain bucket arm 104;

[0123] 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 .

[0124] It should be noted that the vertical line passing through the center of gravity of the material-retrieving device and the axis of the rotating shaft 103 are arranged at intervals, which means that the vertical line passing through the center of gravity of the material-retrieving 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-retrieving device are not on the same straight line in the vertical direction. In order to maintain this state, this embodiment flexibly connects the traction hinge 206 of the material-retrieving device 100 by setting a swing mechanism 200; the swing mechanism 200 is suitable for traction of the material-retrieving device 100, so that the material-retrieving device 100 is maintained in the first preset position when it is not subjected to external force; in the first preset position, the vertical line passing through the center of gravity of the material-retrieving device 100 and the axis of the rotating shaft 103 are arranged at intervals, and the torque of the material-retrieving device under the action of gravity makes the material-retrieving device have a tendency to move toward the land side direction.

[0125] 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 tendency to move toward the head of the hopper, which facilitates material picking and reduces energy consumption.

[0126] The material-reclaiming device is roughly constructed in a herringbone shape. In the initial position, the center of gravity and the hinge point of the material-reclaiming device are not in a straight line, and there is a torque. During excavation operations, the material-reclaiming 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 keep its 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-reclaiming efficiency and reducing additional force. The material-reclaiming device can even use its own gravity to complete material reclaiming without the need for additional force, thereby reducing energy consumption.

[0127] Specifically, the driving unit includes a third 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 third driving motor 101 is suitable for driving the hopper chain 110 to operate via the driving sprocket 102 .

[0128] Preferably, the output shaft at the end of the third driving motor 101 is connected to the driving sprocket 102 after being reduced in speed, and the driving sprocket 102 is located at the upper part of the material taking device.

[0129] Specifically, the rotation axis of the driving sprocket 102 coincides with the axis of the rotating shaft 103 .

[0130] Specifically, the material taking 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 ;

[0131] The two tensioning sprockets 108 are suitable for stretching the bucket chain 110 and allowing at least a portion of the bucket chain 110 to form a material taking section 150 suitable for contacting the material 30 .

[0132] 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.

[0133] Specifically, the material taking device further includes: a tensioning push rod 106 disposed between the two tensioning sprockets 108, adapted to keep the two tensioning sprockets 108 relatively far apart to tension the bucket chain 110. Thus, the tension of the bucket chain 110 is ensured and the length of the material taking section 150 is maintained.

[0134] 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 .

[0135] It should be noted that the end of the material taking 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 is in contact with the material 30. Correspondingly, the head end of the material taking 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 is in contact with the material 30.

[0136] 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.

[0137] Specifically, after the hopper chain 110 bypasses the driving 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 arranged 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.

[0138] Preferably, by providing a first redirecting sprocket 1051 between the driving sprocket 102 and the head end of the material picking section 150, the bucket chain 110 forms a first descending section 130 and a second descending section 140, and the second descending section 140 is arranged at an angle to the first descending section 130, so that the overall structure of the bucket chain 110 is roughly herringbone, that is, at the upper part of the material picking device, the loaded bucket and the empty bucket are closer, so that the upper structure of the material picking device is smaller, and at the lower part of the material picking device, after being redirected by the first redirecting sprocket 1051, the lifting bucket and the lowering bucket will move away from each other, and the lowering bucket will bend at an angle, so that the lower part of the material picking device forms a triangle-like shape, which is convenient for setting the material picking section 150.

[0139] Preferably, by adopting a herringbone feeding device, a method of feeding from the front of the bucket mouth edge line with a higher force efficiency ratio is adopted. At the bottom of the herringbone structure, in order to allow the feeding arm to dig materials under the hatch coaming, a feeding section 150 of sufficient length is provided at the bottom of the feeding device, so that the hopper can dig materials at high speed in the ship width direction, and the efficiency is greatly improved.

[0140] The traditional L-shaped reclaiming head sweeps left and right to let the material enter the hopper, but the deep and narrow reclaiming device is not easy to unload cleanly when unloading, and this rotary feeding method must use an L-shaped reclaiming device and a deep and narrow hopper to achieve rotary stacking feeding. The reclaiming device provided in this embodiment adopts a front reclaiming head with a herringbone structure. Compared with the traditional chain bucket ship unloader, it has a simpler structure, and the force on the bottom of the entire reclaiming device is more uniform, and the cost is also lower.

[0141] Specifically, a second redirecting sprocket 1052 is disposed 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 .

[0142] 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 efficient unloading.

[0143] Preferably, a dustproof cover 107 is provided outside the hopper chain 110 to prevent dust. The hopper is only exposed at the lower part of the material taking device.

[0144] Due to the rotary feeding method used by the conventional chain bucket ship unloader, the chain bucket needs to be a deep and narrow bucket to facilitate digging, and the deep and narrow chain bucket is not easy to unload cleanly during unloading. However, due to the front feeding method, the bucket of this embodiment can be set as a wide and shallow bucket, which is convenient for material entry and pouring.

[0145] The hopper chain 110 is formed by alternately connecting hoppers 111 and connecting plates 112. Ear plates 114 are provided at both ends of the hopper 111. The ear plates 114 are provided with shaft holes. The connecting plates 112 are also provided with shaft holes. The ear plates 114 and the connecting plates 112 are hinged with pins, so that all the hoppers are connected together to form a hopper chain.

[0146] The reclaiming device of the traditional chain bucket ship unloader adopts chain transmission. The reclaiming chain bucket is installed between two chains, and the driving device drives the chain to drive the chain bucket to move. This transmission method has high requirements on the performance of the chain, and the chain is easy to damage and needs to be replaced regularly, which has high maintenance costs.

[0147] Preferably, in the material taking device provided in this embodiment, the hopper back plate 113 of the hopper 111 can directly participate in the transmission, canceling the traditional chain transmission, using the connecting plate and the hopper back plate transmission, and using the connecting plate to connect the hoppers together, so that the hopper becomes a part of the transmission. The hopper is not only a working mechanism for digging materials, but also participates in the transmission as a part of the hopper chain, which increases the force area and improves reliability.

[0148] Preferably, the driving sprocket and the redirecting sprocket act on a connecting plate, which is connected to a pin on the back plate, and the connecting plate is outside the hopper, so that it will not interfere with the hopper during driving and redirection. The connecting plate is made of high-strength material to ensure reliability during driving and redirection.

[0149] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A ship unloader with a counterweight system, characterized in that: include: A door frame (10), including door legs; Boom (601); An arm lifting system (600) adapted to control the arm (601) to move up and down along the door leg; A material taking device, suitable for digging materials, comprising a chain bucket arm, wherein the chain bucket arm is slidably connected to the arm frame (601); A counterweight system (700) comprises a counterweight trolley (701) and a first driving structure, wherein the counterweight trolley (701) is slidably connected to the arm frame (601), and the first driving structure is adapted to drive the counterweight trolley (701) to move according to the position of the chain bucket arm on the arm frame (601); The arm frame (601) includes two main beams (6012) and at least one cross beam, the two main beams (6012) are parallel and spaced apart, and the two ends of the cross beam are respectively vertically connected to the two main beams (6012); the chain bucket arm and the counterweight trolley (701) are both movably connected to the main beams (6012) and are located between the two main beams (6012); The balancing weight system (700) further comprises: There are two counterweight rails (704), which are respectively arranged on the two main beams (6012); A counterweight frame (705) is fixedly connected to the counterweight trolley (701); and two sides of the counterweight frame (705) are movably connected to the two counterweight rails (704) respectively; The first driving structure comprises: A first driving motor (702) connected to the counterweight frame (705); A first counterweight wheel (703) is rotatably connected to both sides of the counterweight frame (705) and is connected to the power output end of the first drive motor (702); the first counterweight wheel (703) is rotatably arranged on the counterweight track (704); The boom lifting system (600) comprises: A traction mechanism (602) is arranged on the arm (601); A pulley assembly (603), comprising a first pulley (6031) and a second pulley (6032), wherein the first pulley (6031) is connected to the top of the door leg, and the second pulley (6032) is connected to the arm (601); A transmission member (604), one end of which is connected to the traction mechanism (602), and the other end of which is connected to the arm (601) after passing through the second pulley (6032) and the first pulley (6031); An energy-saving structure (607), connected to the arm frame (601), and used for balancing the weight of the arm frame (601); The pulley assembly (603) further comprises a third pulley (6033), wherein the third pulley (6033) is connected to the top of the door leg, and the energy-saving structure (607) comprises: A second counterweight (6071); An energy-saving rope (6072) has one end connected to the arm (601) and the other end passing around the third pulley (6033) and connected to the second counterweight (6071).

2. The ship unloader with a counterweight system according to claim 1, characterized in that: The counterweight trolley (701) comprises: Carriage (7011); A first counterweight (7012) is movably disposed in the carriage (7011); The second driving structure is arranged on the carriage (7011) and is suitable for driving the first counterweight (7012) to move along the length direction of the crossbeam.

3. The ship unloader with a counterweight system according to claim 2, characterized in that: The second driving structure comprises: A second driving motor (7013) connected to the wall of the carriage (7011); A screw rod (7014) has one end connected to the power output end of the second drive motor (7013), and the other end extending in a direction parallel to the crossbeam; a threaded hole is provided on the first counterweight block (7012), and the threaded hole is threadedly matched with the screw rod (7014).

4. The ship unloader with a counterweight system according to claim 3, characterized in that: The second driving structure also includes a fixed bearing (7015), which is connected to the wall of the carriage (7011) and is arranged opposite to the second driving motor. The end of the screw rod (7014) away from the second driving motor is rotationally connected to the fixed bearing (7015).

5. The ship unloader with a counterweight system according to claim 2, characterized in that: The counterweight trolley (701) further comprises a second counterweight wheel (7016), and the second counterweight wheel (7016) is rotatably connected to the bottom of the first counterweight block (7012).

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