Ship unloader with boom hoist system

Abstract

The present application relates to ship unloader technical field, specifically to a kind of ship unloader with boom lifting system, including door leg, boom and chain bucket arm, the chain bucket arm is connected in the boom;It further includes boom lifting system, the boom lifting system includes traction mechanism, pulley assembly, transmission part, mounting bracket and rolling structure, traction mechanism is set in the boom;Pulley assembly includes first pulley, the first pulley is connected in the top of the door leg;Transmission part one end is connected with the traction mechanism, the other end passes around the first pulley and is connected with the boom;The boom is suitable for being controlled along the door leg by the traction mechanism and the transmission part and rises or falls;Mounting bracket is connected with the boom, and with the side portion of the boom is enclosed installation cavity, the installation cavity is movably set in the outer periphery of the door leg;One end of rolling structure is connected in the boom and / or the mounting bracket, and the other end is rollingly matched with the door leg.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ship unloaders, in particular to a ship unloader with a boom lifting system. BACKGROUND

[0002] The chain bucket ship unloader has a long application history in the port bulk cargo unloading wharf, and has a prominent environmental protection advantage. The traditional chain bucket ship unloader generally adopts a portal structure, the chain bucket arm is fixed at the front end of the boom, and the movement of the chain bucket arm is realized by rotation of the boom and pitching of the boom. However, when adjusting the position of the chain bucket arm, the traditional chain bucket ship unloader needs to work together with the rotation mechanism, the pitching mechanism and the chain bucket arm lifting mechanism to adjust, and the adjustment method is relatively complex and tedious, which makes the unloading efficiency of the whole machine relatively low. Especially when the position is adjusted in the ship depth direction, the pitching mechanism and the chain bucket arm lifting mechanism need to work together to complete the adjustment, which seriously affects the unloading efficiency of the whole machine. SUMMARY

[0003] Therefore, the technical problem to be solved by the present application is to overcome the defect that the position adjustment of the chain bucket arm needs to be completed by multiple structures in the prior art, which leads to low unloading efficiency, so as to provide a ship unloader with a boom lifting system to improve the unloading efficiency.

[0004] In order to solve the above problems, the present application provides a ship unloader with a boom lifting system, which comprises a portal leg, a boom and a chain bucket arm, the chain bucket arm is connected to the boom; further comprising a boom lifting system, the boom lifting system comprises a traction mechanism, a pulley assembly, a transmission member, a mounting bracket and a rolling structure, the traction mechanism is arranged on the boom; the pulley assembly comprises a first pulley, the first pulley is connected to the top of the portal leg; one end of the transmission member is connected with the traction mechanism, and the other end passes around the first pulley and is connected with the boom; the boom is adapted to be controlled to ascend or descend along the portal leg by the traction mechanism and the transmission member; the mounting bracket is connected with the boom and surrounds a closed mounting cavity with the side of the boom, the mounting cavity is movably sleeved on the outer periphery of the portal leg; one end of the rolling structure is connected to the boom and / or the mounting bracket, and the other end is in rolling cooperation with the portal leg.

[0005] The ship unloader with a boom lifting system provided by the present application, the mounting bracket comprises a first mounting arm, a second mounting arm and a third mounting arm; one end of the second mounting arm is connected at an angle with one end of the first mounting arm, and the other end is connected with the side of the boom; one end of the third mounting arm is connected at an angle with the other end of the first mounting arm, and the other end is connected with the side of the boom.

[0006] The ship unloader with a boom lifting system provided by the present application, the second mounting arm and the third mounting arm are both welded with the side of the boom.

[0007] The ship unloader with the boom lifting system comprises a door leg, a boom, a chain bucket arm, a boom lifting system, a first mounting arm, a second mounting arm, a third mounting arm and a rolling structure.

[0008] The ship unloader with the boom lifting system comprises a door leg, a boom, a chain bucket arm, a boom lifting system, a first mounting arm, a second mounting arm, a third mounting arm and a rolling structure.

[0009] The ship unloader with the boom lifting system comprises a door leg, a boom, a chain bucket arm, a boom lifting system, a first mounting arm, a second mounting arm, a third mounting arm and a rolling structure.

[0010] The ship unloader with the boom lifting system comprises a door leg, a boom, a chain bucket arm, a boom lifting system, a first mounting arm, a second mounting arm, a third mounting arm and a rolling structure.

[0011] The ship unloader with the boom lifting system comprises a door leg, a boom, a chain bucket arm, a boom lifting system, a first mounting arm, a second mounting arm, a third mounting arm and a rolling structure.

[0012] The ship unloader with the boom lifting system comprises a door leg, a boom, a chain bucket arm, a boom lifting system, a first mounting arm, a second mounting arm, a third mounting arm and a rolling structure.

[0013] The ship unloader with the boom lifting system comprises a door leg, a boom, a chain bucket arm, a boom lifting system, a first mounting arm, a second mounting arm, a third mounting arm and a rolling structure.

[0014] The ship unloader with the boom lifting system comprises a door leg, a boom, a chain bucket arm, a boom lifting system, a first mounting arm, a second mounting arm, a third mounting arm and a rolling structure.

[0015] 1. The ship unloader with the boom lifting system comprises a door leg, a boom, a chain bucket arm, a boom lifting system, a first mounting arm, a second mounting arm, a third mounting arm and a rolling structure.

[0016] The arm frame lifting system realizes the overall lifting of the arm frame, can conveniently adjust the height of the arm frame and the chain bucket arm in a large range, greatly improves the overall loading and unloading efficiency, and effectively improves the safety of the ship unloader under extreme weather. One end of the transmission member is connected with the arm frame, the other end is connected with the traction mechanism arranged on the arm frame after passing through the first pulley, the first pulley is arranged at the top of the door leg, a height difference is generated, and the lifting of the arm frame is facilitated. The mounting frame and the arm frame surround the mounting cavity, the mounting cavity is rolling matched with the door leg through the rolling structure, the friction between the door leg and the support is reduced, the noise is reduced, the lifting direction of the arm frame in the direction of the door leg is guided, in addition, the lifting displacement between the door leg and the arm frame is limited from the outer periphery of the door leg, and the connection position between the door leg and the arm frame is prevented from deviating or mispositioning.

[0017] 2. The ship unloader with the arm frame lifting system provided by the present application, wherein the rolling structure further comprises an elastic damping member, and the rolling wheel is connected with the cavity wall of the mounting cavity through the elastic damping member. The elastic damping member can reduce the influence of vibration on the arm frame during rolling of the rolling wheel. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the following specific embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1 A schematic view of the ship unloader with the arm frame lifting system of the present application is shown;

[0020] Figure 2 A partial schematic view of the arm frame lifting system of the present application is shown;

[0021] Figure 3 An enlarged view of part A of Figure 2 is shown;

[0022] Figure 4 A bottom view of Figure 2 is shown;

[0023] Figure 5 A schematic view of the arm frame of the present application is shown;

[0024] Figure 6 A schematic view of the arm frame lifting system of the present application is shown;

[0025] Figure 7 A schematic view of the present application is shown.

[0026] Figure 8 is a partial enlargement of Figure 7 ; Figure 1 ;

[0027] Figure 9 is a partial enlargement of Figure 7 ; Figure 2 ;

[0028] Figure 10 is a schematic view of the cooperation state of the swing mechanism and the material taking device of the application;

[0029] Figure 11 is a schematic view of multiple swing position states of the material taking device of the application;

[0030] Figure 12 is a partial schematic view of the hopper chain of the application;

[0031] Figure 13 is a schematic view of the hopper of the application.

[0032] Explanation of reference signs:

[0033] 11, door leg; 1101, guide rail; 13, running trolley; 20, cabin; 30, material; 40, wharf foundation;

[0034] 100, material taking device; 101, driving motor; 102, driving sprocket; 103, rotating shaft; 104, chain hopper 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, ear plate;

[0035] 120, material lifting section; 130, first material lowering section; 140, second material lowering section; 150, material taking section; 160, material unloading section;

[0036] 200, swing mechanism; 201, swing mechanism tensioning oil cylinder; 202, swing mechanism traction rope; 203, swing mechanism redirecting pulley; 204, swing mechanism damping oil cylinder; 205, damping pulley; 206, traction hinge point;

[0037] 210, first swing state; 220, second swing state; 230, third swing state;

[0038] 600, arm lifting system; 601, arm frame; 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, mounting frame; 6071, first mounting arm; 6072, second mounting arm; 6073, third mounting arm. DETAILED DESCRIPTION

[0039] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0040] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0043] As Figures 1 to 13As shown, the embodiment discloses a ship unloader with an arm lifting system 600, which comprises a gate leg 11, an arm 601 and a chain bucket arm 104 connected to the arm 601, and further comprises an arm lifting system 600, which comprises a traction mechanism 602, a pulley assembly 603, a transmission member 604, a mounting frame 607 and a rolling structure 605. The traction mechanism 602 is arranged on the arm 601. The pulley assembly 603 comprises a first pulley 6031 connected to the top of the gate leg 11. One end of the transmission member 604 is connected to the traction mechanism 602, and the other end passes through the first pulley 6031 and is connected to the arm 601. The arm 601 is adapted to be lifted or lowered along the gate leg 11 by controlling the traction mechanism 602 and the transmission member 604. The mounting frame 607 is connected to the arm 601 and surrounds the side of the arm 601 to form a closed mounting cavity, which is movably sleeved on the outer periphery of the gate leg 11. One end of the rolling structure 605 is connected to the arm 601 and / or the mounting frame 607, and the other end is in rolling cooperation with the gate leg 11.

[0044] Through the arm lifting system 600, the overall lifting of the arm 601 is realized, which can conveniently adjust the height of the arm 601 and the chain bucket arm 104 in a large range, greatly improves the overall loading and unloading efficiency, and effectively improves the safety of the ship unloader in extreme weather. Without the cooperation of multiple structures, one end of the transmission member 604 of the arm 601 and the chain bucket arm 104 is connected to the arm 601, and the other end passes through the first pulley 6031 and is connected to the traction mechanism 602 arranged on the arm 601. The first pulley 6031 is arranged at the top of the gate leg 11, which produces a height difference and is convenient for controlling the lifting of the arm 601. The mounting frame 607 and the arm 601 surround the mounting cavity, and the mounting cavity is in rolling cooperation with the gate leg 11 through the rolling structure 605, which not only reduces the friction between the gate leg 11 and the support and reduces the noise, but also guides the lifting direction of the arm 601 along the direction of the gate leg 11. In addition, the lifting displacement between the gate leg 11 and the arm 601 is limited from the outer periphery of the gate leg 11, which prevents the connection position between the gate leg 11 and the arm 601 from deviating or misplacing. If the lengths of the transmission members 604 on both sides of the arm 601 are different when lifting or lowering, the two sides of the arm 601 cannot be lifted or lowered at the same time, and the arm 601 will be inclined. The mounting frame 607 of the present application surrounds the closed mounting cavity with the arm 601, and the mounting frames 607 on the opposite sides of the arm 601 will block the arm 601 through the rolling structure 605 and the gate leg 11, so that the arm 601 will not be greatly inclined, thereby ensuring the levelness of the arm 601 when lifting or lowering and increasing the safety of the arm lifting system.

[0045] In a specific embodiment of the present embodiment, the arm support 601 comprises two main beams and at least one secondary beam connected to the two main beams at two ends, each main beam is lifted along the two door legs 11, and each position where the main beam cooperates with the door leg 11 is provided with a mounting frame 607 and a rolling structure 605. If the transmission members 604 of the two main beams have different lengths when lifting or lowering, the two sides of the arm support 601 cannot be lifted or lowered at the same time, and the mounting frame 607 of the present application is surrounded by the arm support 601 to form a closed mounting cavity, and the mounting frame 607 connected to the two main beams can be clamped to the main beam through the rolling structure 605 and the door leg 11, so that the arm support 601 cannot be greatly inclined, thereby ensuring the levelness of the arm support 601 when lifting or lowering, and increasing the safety of the lifting system of the arm support 601.

[0046] In a specific embodiment of the present embodiment, the rolling structure 605 has a plurality of rolling structures 605 connected to the arm support 601 and the mounting frame 607. Preferably, the rolling structure 605 on the mounting frame 607 is arranged opposite to the rolling structure 605 on the arm support 601.

[0047] In another specific embodiment of the present embodiment, the rolling structure 605 has a plurality of rolling structures 605 connected to different positions of the mounting frame 607 and rolling in different directions with the door leg 11.

[0048] In another specific embodiment of the present embodiment, the rolling structure 605 has at least one rolling structure 605 connected to the arm support 601 and rolling with the side wall of the door leg 11 close to the arm support 601.

[0049] In the present embodiment, the mounting frame 607 comprises a first mounting arm 6071, a second mounting arm 6072 and a third mounting arm 6073; one end of the second mounting arm 6072 is connected to one end of the first mounting arm 6071 at an angle, and the other end is connected to the side of the arm support 601; one end of the third mounting arm 6073 is connected to the other end of the first mounting arm 6071 at an angle, and the other end is connected to the side of the arm support 601. Specifically, the first mounting arm 6071 and the second mounting arm 6072 are welded, and the first mounting arm 6071 and the third mounting arm 6073 are welded.

[0050] Preferably, the first mounting arm 6071, the second mounting arm 6072 and the third mounting arm 6073 form a mounting cavity with the arm support 601, the cross section of which is rectangular or trapezoidal or other quadrilateral, which can limit the door leg 11 in four directions, and the shape of the cross section of the mounting cavity matches the shape of the cross section of the door leg 11.

[0051] In the present embodiment, the second mounting arm 6072 and the third mounting arm 6073 are both welded to the side of the arm support 601, which is stable in connection and has better limiting effect.

[0052] In the embodiment, the second mounting arm 6072 and the third mounting arm 6073 are both connected perpendicularly to the first mounting arm 6071. The first mounting arm 6071, the second mounting arm 6072, the third mounting arm 6073 and the side portion of the arm frame 601 form a mounting cavity with a rectangular cross section.

[0053] In the embodiment, the first mounting arm 6071, the second mounting arm 6072, the third mounting arm 6073 and the side portion of the arm frame 601 are respectively connected to at least one rolling structure 605. Rolling cooperation with the door legs 11 in four directions can prevent the arm frame 601 from being skewed.

[0054] In the embodiment, the pulley assembly 603 further comprises a second pulley 6032 connected to the arm frame 601, one end of the transmission member 604 is connected to the traction mechanism 602, and the other end is connected to the arm frame 601 after passing through the second pulley 6032 and the first pulley 6031. The arrangement of the second pulley 6032 reduces the pressure borne by the transmission member 604, making the lifting of the arm frame 601 more convenient. In the specific embodiment, an upwardly extending protruding column is provided on the arm frame 601, and the second pulley 6032 is arranged on the protruding column, reducing the length of the transmission member 604.

[0055] In the embodiment, the pulley assembly 603 and the transmission member 604 each have multiple groups, and each of the door legs 11 is matched with a group of the pulley assembly 603. The traction mechanism 602 can have one group, and one group of the traction mechanism 602 simultaneously controls the pulley assemblies 603 near four door legs 11; or the traction mechanism 602 can also have two groups, and one group of the traction mechanism 602 simultaneously controls the pulley assemblies 603 near two door legs 11.

[0056] In the embodiment, the transmission member 604 is a steel wire rope.

[0057] In the specific embodiment, when the chain bucket arm 104 trolley needs to work in deep tanks or needs to be lifted or lowered in the ship depth direction due to water level changes during the operation of the ship unloader, the arm frame lifting system 600 is used to lift or lower the chain bucket arm 104, the chain bucket arm 104 trolley and the arm frame 601 as a whole.

[0058] In the embodiment, the rolling structure 605 comprises a roller 6051 arranged in the mounting cavity and rotatably connected to the cavity wall of the mounting cavity and rolling cooperation with the door leg 11. In the specific embodiment, the rolling structure 605 further comprises a rolling frame arranged on the arm frame 601, and the roller 6051 is connected to the rolling frame.

[0059] In the embodiment, the rolling structure 605 further comprises an elastic damping member 6052, and the rolling wheel 6051 is connected with the cavity wall of the mounting cavity through the elastic damping member 6052. The elastic damping member 6052 can reduce the influence of vibration on the arm support 601 during rolling of the rolling wheel 6051.

[0060] In the embodiment, the door leg 11 is provided with a guide rail 1101 matched with the rolling wheel 6051, and the rolling wheel 6051 is adapted to ascend and descend along the guide rail 1101.

[0061] The guide rail 1101 is used for guiding the rolling wheel 6051 and preventing the rolling wheel 6051 from derailing and affecting the ascending and descending of the arm support 601. Specifically, the guide rail 1101 comprises a guide strip and a guide groove arranged on the guide strip, and the rolling wheel is adapted to move along the guide groove. Alternatively, the guide rail 1101 comprises two parallel guide strips, and the rolling wheel moves along a guide groove formed between the two guide strips.

[0062] In the unloading machine with the arm support ascending and descending system 600, at least one locking structure 606 is arranged on each of the second mounting arm 6072 and the third mounting arm 6073, and the locking structure 606 is used for locking the door leg 11 from two opposite sides of the door leg 11 to lock the arm support 601 at a corresponding height. In a preferred embodiment, the locking structure 606 can be a hydraulic oil cylinder. In another preferred embodiment, the locking structure 606 can be a rail clamp.

[0063] As a convertible embodiment, at least one locking structure 606 is arranged on each of the side of the arm support 601 and the first mounting arm 6071, and the locking structure 606 is used for locking the door leg 11 from two opposite sides of the door leg 11 to lock the arm support 601 at a corresponding height.

[0064] As a convertible embodiment, at least one locking structure 606 is arranged on each of the side of the arm support 601, the first mounting arm 6071, the second mounting arm 6072 and the third mounting arm 6073, and the locking structure 606 is used for locking the door leg 11 from four sides of the door leg 11 to lock the arm support 601 at a corresponding height.

[0065] In the embodiment, before the arm support 601 is lifted, the locking structure 606 is loosened, the transmission member 604 drags the arm support 601 under the driving of the traction mechanism 602, the rolling wheel 6051 rolls on the surface of the door leg 11, and the elastic damping member 6052 can reduce the influence of vibration on the arm support 601 during rolling. When the arm support 601 is lifted or lowered to a suitable height, the locking structure 606 clamps the door leg 11 from two sides to fix the height position of the arm support 601, and the lifting process is completed.

[0066] The ship unloader with the boom lifting system 600 in the embodiment further comprises an energy-saving structure 607 connected with the boom 601 for balancing the weight of the boom 601. The energy-saving structure 607 balances the effective weight of the boom 601 when the boom 601 is lifted, effectively reduces the installed capacity of the motor in the traction mechanism 602, reduces the energy consumption of the boom 601 in lifting, and realizes the energy-saving effect.

[0067] In the embodiment, the pulley assembly 603 further comprises a third pulley 6033 connected at the top of the door leg 11, and the energy-saving structure 607 comprises a counterweight 6071 and an energy-saving rope 6072. One end of the energy-saving rope 6072 is connected with the boom 601, and the other end is connected with the counterweight 6072 by passing through the third pulley 6033.

[0068] When the boom 601 is lifted under the control of the boom lifting system 600, the counterweight 6071 is lowered, the counterweight 6071 balances the effective weight of the boom 601 when the boom 601 is lifted, effectively reduces the installed capacity of the motor in the traction mechanism 602, reduces the energy consumption of the boom 601 in lifting, and realizes the energy-saving effect. When the boom 601 is lowered under the control of the boom lifting system 600, the counterweight 6071 is lifted, balances the effective weight of the boom 601 when the boom 601 is lowered, slows down the descending 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 in lowering, and realizes the energy-saving effect. In the preferred embodiment, the weight of the counterweight 6071 is close to the total weight of the boom 601 when it is empty, and the counterweight 6071 and the boom 601 offset each other to reduce the effective weight of the boom 601 when it is lifted.

[0069] In the embodiment, the top of the door leg 11 is connected with a cross beam 14, the first pulley 6031 is connected at the bottom of the cross beam 14, and the third pulley 6033 has two, the two third pulleys 6033 are respectively connected at the two ends of the top of the cross beam 14, and the third pulley 6033 close to the counterweight 6071 is extended from the cross beam 14 to the side of the door leg 11. The third pulley 6033 close to the counterweight 6071 is extended to the side of the door leg 11, the counterweight 6071 passing through the third pulley 6033 can hang at the side of the door leg 11 under the action of gravity, and has a gap between the counterweight 6071 and the door leg 11, avoiding the counterweight 6071 adhering to the door leg 11, generating noise by friction with the door leg 11, and damaging the door leg 11.

[0070] In the preferred embodiment, the first pulley 6031 and the third pulley 6033 are staggered in the vertical direction to prevent the transmission member 604 from rubbing or winding with the energy-saving rope 6072.

[0071] The ship unloader with the boom lifting system 600 of the embodiment further comprises a swing material taking assembly, which comprises a material taking device 100, a swing shaft 103 and a swing mechanism 200, the material taking device 100 is suitable for digging the material 30; the swing shaft 103 is hingedly connected with the material taking device 100, the material taking device 100 is suitable for swinging around the swing shaft 103; the swing mechanism 200 is flexibly connected with a traction hinge point 206 of the material taking device 100; the swing mechanism 200 is suitable for traction of the material taking device 100, so that the material taking device 100 is maintained in a first preset position when not subjected to external force; and when in the first preset position, a vertical line passing through the gravity center of the material taking device 100 is arranged to be spaced apart from the shaft center of the swing shaft 103, and the moment of force of the material taking device under the action of gravity makes the material taking device have a tendency to move towards the land side direction.

[0072] Preferably, the material taking device 100 comprises a hopper chain 110 sequentially connected end to end by a plurality of hoppers 111, the hopper chain 110 moves back and forth in a loop to dig the material 30 by the hoppers 111, and the specific structure of the material taking device will be described in detail below.

[0073] Specifically, the swing mechanism 200 comprises a swing mechanism tensioning oil cylinder 201 and a swing mechanism traction rope 202; one end of the swing mechanism traction rope 202 is connected with the traction hinge point 206, and the other end is connected with the swing mechanism tensioning oil cylinder 201; the swing mechanism tensioning oil cylinder 201 is suitable for facilitating the movement of the material taking device 100 towards the land side direction when extended, and facilitating the movement of the material taking device 100 towards the sea side direction when retracted.

[0074] The steel wire rope is connected at one end with the swing mechanism tensioning oil cylinder 201, passes through a fixed pulley set connected at the end of the damping oil cylinder, and is connected at the other end with the traction hinge point 206 at the lower part of the material taking device 100. The movement of the steel wire rope is driven by the extension and retraction of the tensioning oil cylinder, thereby being able to traction the swing of the material taking device 100.

[0075] Preferably, the swing mechanism tensioning oil 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 external force, the swing mechanism tensioning oil cylinder 201 does not extend or retract actively.

[0076] Preferably, the swinging material taking assembly of the present embodiment is preferably applied to a ship unloader, the ship unloader extends an arm 601, and the material taking device 100 is mounted on the arm 601. In particular, the material taking device 100 is hingedly connected to the arm 601 through a rotating shaft 103, so that the material taking device 100 can swing relative to the arm 601 about 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 adapted to swing about the rotating shaft 103. The middle or lower-middle part of the material taking device 100 is provided with a traction hinge point 206, and the swinging mechanism 200 is flexibly connected to the traction hinge point 206. In particular, the swinging mechanism traction rope 202 can be connected to the traction hinge point 206, so that the material taking device 100 can be maintained in a first preset position when not subjected to external force. When in the first preset position, the vertical line passing through the center of gravity of the material taking device 100 is spaced apart from the axis of the rotating shaft 103, and the moment of the material taking device under the action of gravity makes the material taking device have a tendency to move towards the land side. The material taking device has a tendency to move around the rotating shaft 103 and towards the land side under its own gravity.

[0077] It should be noted that the vertical line passing through the center of gravity of the material taking 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 taking device does not pass through the axis of the rotating shaft 103, i.e. the axis of the rotating shaft 103 and the center of gravity of the material taking device are not on the same straight line in the vertical direction.

[0078] The swinging mechanism 200 provides traction force to the material taking device 100, so that the material taking device 100 can be maintained in the first preset position when not subjected to external force. In this position, there will always be a moment towards the land side, which is balanced by the pulling force of the swinging mechanism 200. When the material taking device 100 moves from the sea side to the land side, the self-weight of the material taking device 100, which weighs tens of tons, can always push the material taking device 100 towards the front end of the movement direction, facilitating the front digging of the material by the hopper. Even if the material taking encounters certain resistance, it can still overcome the resistance. When the material taking device 100 moves from the land side to the sea side, the pulling force of the traction steel wire rope can always keep the posture of the material taking device 100 stable.

[0079] When the ship cabin suddenly encounters a surge, in the ship width direction, if the surge exerts a force on the ship and the material taking device 100 towards the sea side, the material taking device 100 will have a tendency to swing clockwise, at this time, the force of the surge applied to the material taking device 100 will only reduce the tension of the steel wire rope, if the size of the moment of the force of the surge on the rotating shaft 103 exceeds the size of the moment of the force of gravity on the rotating shaft 103, the material taking device 100 will slightly swing clockwise, and the force of the surge will be converted into a swing, so as to avoid transmitting the force to the ship unloader structure. If the force of the surge on the ship and the material taking device 100 is towards the land side, the material taking device 100 will suddenly be subjected to the force of the surge, and the tension of the steel wire rope will rapidly increase, 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 value, the damping oil cylinder is released, the length of the steel wire rope increases, and the material taking device 100 swings counterclockwise to reach a new balance state. The force of the surge applied to the material taking device 100 is converted into the swing of the material taking 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.

[0080] The swing material taking assembly provided by the embodiment is pulled by the swing mechanism 200, so that the material taking device 100 is maintained at a first preset position when not subjected to external force; and when at the first preset position, a vertical line passing through the center of gravity of the material taking device 100 is arranged to be spaced apart from the axis of the rotating shaft 103, and the moment of force under the action of gravity causes the material taking device to have a tendency to move towards the land side; so that the material taking device can utilize the moment of force generated by its own gravity to assist in material taking, while avoiding the impact of the material moving with the ship under the action of the surge on the material taking arm, and avoiding transmitting the impact force to the structure of the ship unloader, thereby ensuring the safety and reliability of the structure.

[0081] Specifically, the swing mechanism 200 further comprises a swing mechanism redirecting pulley 203 arranged between the swing mechanism tensioning oil cylinder 201 and the traction hinge point 206 and in sliding contact with the swing mechanism traction rope 202.

[0082] Specifically, the swing mechanism 200 further comprises 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 point 206.

[0083] The swing mechanism damping oil cylinder 204 is adapted to be elongated when the moment of force on the material taking device 100 towards the land side is greater than a preset threshold value, and is adapted to be contracted when the material taking device 100 is subjected to a moment of force towards the sea side.

[0084] Preferably, the swing mechanism damping oil cylinder 204 can be elongated according to the situation of the external force borne by 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 moment towards the land side, 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 oil cylinder 204, the swing mechanism damping oil cylinder 204 is elongated; if the material taking device 100 is subjected to a moment towards the sea side, the material taking device 100 reduces the force acting on the swing mechanism traction rope 202, so that the damping oil cylinder is contracted.

[0085] When a surge occurs, the swing mechanism damping oil cylinder 204 is elongated or contracted according to the direction of the force, and when the surge ends, the force borne by the swing mechanism traction rope 202 returns to the state before the surge, and the elongation of the swing mechanism damping oil cylinder 204 returns to the state before the surge, and the angle of the material taking device 100 also returns to the state before the surge. The swing material taking assembly provided in the embodiment can elongate when the material taking device 100 is subjected to a moment towards the land side, and can contract when the material taking device 100 is subjected to a moment towards the sea side, thereby being able to automatically adjust the length of the swing mechanism traction rope 202 according to the force borne by the material taking device 100, facilitating the material taking device 100 to quickly reach a new balance state after being subjected to a force, and ensuring that the force applied to the material taking device 100 during a surge is converted into the swing action of the material taking device 100, and will not act on the structure of the ship unloader, thereby ensuring the safety of the structure during a surge.

[0086] Specifically, the swing mechanism tensioning oil cylinder 201 is adapted to extend and retract in the horizontal direction.

[0087] Specifically, the swing mechanism damping oil cylinder 204 is adapted to extend and retract in the horizontal direction.

[0088] Optionally, the stroke of the swing mechanism tensioning oil cylinder is greater than the stroke of the swing mechanism damping oil cylinder.

[0089] Preferably, the force threshold of the swing mechanism tensioning oil cylinder 201 is greater than the force threshold of the swing mechanism damping oil cylinder 204, so that the reaction of the swing mechanism tensioning oil cylinder 201 is slower than the reaction of the swing mechanism damping oil cylinder 204 when subjected to a force.

[0090] The swing mechanism tensioning oil cylinder 201 has a large stroke and a slow reaction; the swing mechanism damping oil cylinder 204 has a small stroke and a fast reaction.

[0091] Specifically, the contraction of the swing mechanism tensioning oil cylinder 201 is adapted to increase the angle between the axis of the material taking device 100 along its length and the vertical direction.

[0092] The swing mechanism tension cylinder 201 is elongated to reduce the angle between the axis of the material taking device 100 along its length direction and the vertical direction.

[0093] Since the coaming is arranged at the hatch of the ship cabin, the material located below the coaming is difficult to take out in the normal operating position of the material taking device 100, therefore, the swing material taking assembly provided in the embodiment can also drive the material taking device 100 to adjust the angle as required.

[0094] In the normal working state, the material taking device 100 is in the angle position 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 tension cylinder 201 is extended, and the material taking device 100 can be adjusted to the second swing state 220 under the action of the gravity moment. When it is needed to adjust from the first swing state 210 to the third swing state 230, the swing mechanism tension cylinder 201 is retracted, and the steel wire rope pulls the material taking device 100 to adjust to the third swing state 230. By adjusting different postures, the corner material of the ship cabin can be conveniently emptied, and the cleaning capacity can be reduced.

[0095] The swing material taking assembly provided in the embodiment can drive the material taking device to swing slightly around the rotary shaft 103 through the extension and retraction of the swing mechanism tension 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, swinging the material taking device to a certain angle, facilitating the entry into the corner of the cabin to dig the material. The cleaning capacity is reduced, and the actual use efficiency is improved.

[0096] The ship unloader with the boom lifting system 600 in the embodiment includes a boom 601, a running trolley 13, and the swing material taking assembly described above, the running trolley 13 is arranged on the boom 601 and is adapted to move along the length direction of the boom 601, the swing material taking assembly is installed on the running trolley 13, and the running direction of the running trolley 13 is parallel to the rotary plane of the material taking device 100.

[0097] Specifically, the swing mechanism tension cylinder 201 and the swing mechanism damping cylinder 204 are both fixed on the running trolley 13, and the rotary shaft 103 is fixedly arranged on the running trolley 13.

[0098] Specifically, the material taking device 100 is provided with a hopper chain 110 formed by sequentially connecting a plurality of hoppers 111 in a head-to-tail manner, the stress direction of the hopper chain 110 when digging the material 30 is parallel to the rotary plane of the material taking device 100, and the opening direction of the hopper chain 110 when digging the material 30 is towards the sea side.

[0099] Preferably, the ship unloader is arranged on the wharf foundation 40 and extends to the sea side through the boom 601. Preferably, the material taking device 100 is adapted to extend into the ship cabin 20 to facilitate the digging of the material 30.

[0100] Preferably, the material taking device moves only in the front direction of the ship width direction to take material, and the main load received by the material taking device is in the plane of the material taking device, which is beneficial to prolong the service life and improve the efficiency.

[0101] Although the L-shaped chain bucket ship unloader in the prior art solves the environmental problems such as material leakage, the L-shaped chain bucket taking head adopts a horizontal rotation feeding mode, which is easy to make the lower end of the chain bucket vertical arm bear a large horizontal force, and easy to cause excessive torsion of the taking arm, thereby causing failure of the taking arm rotation mechanism and the boom rotation mechanism. The rotation and extrusion type feeding mode determines the feeding width by three parameters of chain bucket pitch, chain speed and chain movement speed, but these parameters are also mutually restricted. Too fast speed will affect the feeding width, and too slow speed will affect the overall lifting efficiency, so the rotation taking mode limits the further improvement of the efficiency.

[0102] In order to solve the problems of unreasonable stress of the ship unloader, easy damage and low unloading efficiency, the material taking device provided in the embodiment comprises a chain bucket arm 104, a bucket chain 110, a driving unit and a rotation shaft 103. The bucket chain 110 is sequentially connected by a plurality of buckets 111, and the bucket chain 110 is arranged around the outer circumferential side of the chain bucket arm 104. The driving unit is adapted to drive the bucket chain 110 to rotate relative to the chain bucket arm 104. The rotation shaft 103 is hingedly connected with the chain bucket arm 104, and the chain bucket arm 104 is adapted to swing around the rotation shaft 103. The stress direction of the bucket chain 110 when digging the material 30 is parallel to the rotation plane of the chain bucket arm 104.

[0103] Preferably, the chain bucket arm 104 is the main structure of the material taking device, and is used to support other structural components. In the embodiment, the chain bucket arm 104 can be a metal frame which extends in the length direction.

[0104] Preferably, the stress direction of the bucket chain 110 when digging the material 30 is the extension direction of the taking section 150.

[0105] The hopper chain 110 is sequentially connected by a plurality of hoppers 111, and is configured in a ring shape and adapted to operate relative to the chain bucket arm 104 under the drive of a drive unit. The hopper chain 110 is provided with a plurality of hoppers 111, so that during the reciprocating movement, the hopper 111 is used to dig the material, and after the material is lifted to a certain height, the material 30 is poured, and then the material is continuously dug. In this embodiment, the material 30 can be coal, and can also be corn, wheat and other grains, or other substances that can be accommodated in the hopper 111.

[0106] Preferably, the material taking device of the embodiment is preferably applied to a ship unloader, and the ship unloader extends an arm support 601, and the chain bucket arm 104 is installed on the arm support 601. Specifically, the chain bucket arm 104 is hingedly connected to the arm support 601 through a rotating shaft 103, so that the chain bucket arm 104 can swing relative to the arm support 601 about the rotating shaft 103. Further, the stress direction of the hopper chain 110 when digging the material 30 is parallel to the rotating plane of the chain bucket arm 104, so that the material taking device does not bear additional force when working, and when the torsional force of the hopper chain 110 when digging the material 30 is too large, the chain bucket arm 104 can swing freely about the rotating shaft 103 under the action of the force. The main load of the material taking device is within the plane of the material taking device, which avoids the chain bucket arm 104 from being damaged due to excessive stress, and is beneficial to prolong the service life of the equipment and improve the efficiency.

[0107] The material taking device provided by the embodiment is provided with the rotating shaft 103, so that the chain bucket arm 104 is adapted to swing about the rotating shaft 103, and the stress direction of the hopper chain 110 when digging the material 30 is parallel to the rotating plane of the chain bucket arm 104, so that the main load of the material taking device is within the plane of the material taking device, the stress is more reasonable, the operation reliability is improved, the chain bucket arm 104 is avoided from being damaged due to excessive stress, and the service life of the equipment is prolonged and the efficiency is improved.

[0108] Further, the opening direction of the hopper 111 is parallel to the rotating plane of the hopper chain 110, and the opening direction of the hopper 111 is parallel to the rotating plane of the chain bucket arm 104. Further, the opening direction of the hopper 111 is parallel to the translation direction of the material taking device along the arm support 601, that is, the material is taken in a front feeding mode, so that the hopper 111 can shovel the material into the hopper more directly when digging the material, and the operation efficiency is greatly improved. The front feeding mode can also avoid the material from being squeezed at the head of the material taking head, and avoid large lateral digging resistance.

[0109] Specifically, the rotating shaft 103 is hingedly connected to the upper portion of the chain bucket arm 104;

[0110] The vertical line passing through the center of gravity of the material taking device is arranged to be spaced apart from the axis of the slewing shaft 103.

[0111] It should be noted that the vertical line passing through the center of gravity of the material taking device is arranged to be spaced apart from the axis of the slewing shaft 103, that is, the axis of the slewing shaft 103 and the center of gravity of the material taking device are not on the same straight line in the vertical direction. In order to maintain this state, the embodiment is flexibly connected with the traction hinge point 206 of the material taking device 100 by arranging the swing mechanism 200; the swing mechanism 200 is suitable for traction of the material taking device 100, so that the material taking device 100 maintains 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 taking device 100 is arranged to be spaced apart from the axis of the slewing shaft 103, and the moment of force of the material taking device under the action of gravity makes the material taking device have a tendency to move towards the land side.

[0112] The material taking device provided by the embodiment is arranged to have the vertical line passing through the center of gravity of the material taking device spaced apart from the axis of the slewing shaft 103, so that the material taking device always has a tendency and moment of force to move towards the front end of material taking, thereby increasing the pressure of the material taking device on the material. The material taking device can always maintain a tendency to move towards the head of the hopper by using the moment of force generated by its own gravity, which facilitates material taking and reduces energy consumption.

[0113] The material taking device is generally configured in a herringbone shape, and in the initial position, the center of gravity of the material taking device and the hinge point are not on the same straight line, and there is a moment of force. In the digging operation, the material taking device can always maintain a tendency to move towards the head of the hopper by using the moment of force generated by its own gravity. If resistance is encountered, such as hardened material, the hopper can always push the head against the hardened material by relying on its own gravity, thereby improving the breaking force on the hardened material. After the hopper digs the material in front, it continues to move forward, thereby improving the material taking efficiency, reducing the additional force, and even allowing the material taking device to complete the material taking by using its own gravity without additional force, thereby reducing energy consumption.

[0114] Specifically, the driving unit includes a driving motor 101 and a driving sprocket 102; the outer periphery side of the driving sprocket 102 is attached to the hopper chain 110, and the driving motor 101 is suitable for driving the hopper chain 110 to rotate via the driving sprocket 102.

[0115] Preferably, the driving motor 101 is connected to the driving sprocket 102 through a speed reducer at the end of the output shaft, and the driving sprocket 102 is located at the upper part of the material taking device.

[0116] Specifically, the rotation axis of the driving sprocket 102 coincides with the axis of the slewing shaft 103.

[0117] Specifically, the material taking device further comprises two tension sprockets 108 arranged at one end away from the driving sprocket 102 along the length direction of the bucket chain 110;

[0118] The two tension sprockets 108 are adapted to stretch the bucket chain 110 and form at least a part of the bucket chain 110 into a material taking section 150 adapted to contact the material 30.

[0119] The two tension sprockets 108 are located at the lower part of the material taking device, and the two tension sprockets 108 can stretch the lower part of the bucket chain 110 so that the plurality of buckets can be in an open forward state when running to this position, thereby facilitating the simultaneous taking of material by the plurality of buckets and improving the material taking efficiency.

[0120] Specifically, the material taking device further comprises a tension push rod 106 arranged between the two tension sprockets 108 and adapted to maintain the relative distance of the two tension sprockets 108 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.

[0121] Specifically, the end of the material taking section 150 and the driving sprocket 102 form a material lifting section 120 adapted to lift the material 30.

[0122] It should be noted that the end of the material taking section 150 refers to the end of the bucket chain 110 in contact with the material 30 along the rotation direction of the bucket chain 110. Correspondingly, the head of the material taking section 150 refers to the head of the bucket chain 110 in contact with the material 30 along the rotation direction of the bucket chain 110.

[0123] Preferably, the material lifting section 120 in the embodiment is a straight section. By arranging the material lifting section 120 as a straight section, the bucket is always kept in a straight line, ensuring the stability of the material lifting process.

[0124] Specifically, the bucket chain 110 changes the orientation of the opening of the bucket 111 and completes the unloading after passing the driving sprocket 102 at the end of the material lifting section 120; a first reversing sprocket 1051 is arranged between the driving sprocket 102 and the head of the material taking section 150; the bucket chain 110 forms a first descending section 130 between the driving sprocket 102 and the first reversing sprocket 1051, and forms a second descending section 140 between the first reversing sprocket 1051 and the head of the material taking section 150; the second descending section 140 is arranged at an angle with the first descending section 130.

[0125] Preferably, the first redirecting sprocket 1051 is arranged between the driving sprocket 102 and the first end of the material taking section 150, so that the hopper 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 with the first descending section 130, so that the hopper chain 110 is configured in a generally herringbone shape, i.e. at the upper part of the material taking device, the load-lifting hopper and the load-descending hopper are close to each other, so that the upper part of the material taking device is small, 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 are far away from each other, and the descending hopper is bent at an angle, so that the lower part of the material taking device is formed in a shape similar to a triangle, and the material taking section 150 is conveniently arranged.

[0126] Preferably, by adopting the herringbone-shaped material taking device, the way of front loading of the blade line of the hopper mouth with higher force efficiency is adopted, at the bottom of the herringbone structure, in order to enable the material taking arm to dig the material below the hatch coaming, a material taking section 150 with sufficient length is arranged at the bottom of the material taking device, so that the hopper can dig the material at a high speed in the ship width direction, and the efficiency is greatly improved.

[0127] The traditional L-shaped material taking head is used to realize the material entering the hopper by left and right sweeping, but the deep and narrow material taking device is not easy to unload completely, and the way of rotary feeding must be adopted by the L-shaped material taking device and the deep and narrow hopper, so as to realize the rotary stacking and squeezing feeding. The material taking device provided in the embodiment adopts the front material taking head with the herringbone structure, compared with the traditional chain hopper ship unloader, the structure is simpler, the stress of the whole bottom of the material taking device is more uniform, and the cost is lower.

[0128] Specifically, the second redirecting sprocket 1052 is arranged between the driving sprocket 102 and the first redirecting sprocket 1051, and the hopper chain 110 forms the unloading section 160 between the driving sprocket 102 and the second redirecting sprocket 1052.

[0129] Preferably, a funnel or other material collecting device can be arranged at the opposite lower position of the unloading section 160, so as to facilitate the subsequent transfer of the material. By arranging the unloading section 160, the interference of the downward moving empty hopper to the full hopper which needs to be unloaded can be reduced, and the efficient unloading operation is ensured.

[0130] Preferably, a cover 107 for dust prevention is further arranged outside the hopper chain 110, which plays a role in dust prevention. The hopper is only exposed at the lower part of the material taking device.

[0131] Due to the rotary feeding way used by the traditional chain hopper ship unloader, the deep and narrow hopper needs to be selected for the chain hopper to facilitate digging, and the deep and narrow hopper is not easy to unload completely. The hopper of the embodiment adopts the front feeding way, and can be arranged as a wide and shallow hopper, which facilitates the material entering and pouring out.

[0132] The hopper chain 110 is connected by alternately connecting the hopper 111 and the connecting plate 112, both ends of the hopper 111 are provided with the ear plate 114, the ear plate 114 is provided with the shaft hole, the connecting plate 112 is also provided with the shaft hole, the ear plate 114 and the connecting plate 112 are hinged by the pin shaft, thereby connecting all the hoppers together to form the hopper chain.

[0133] The traditional chain bucket unloader adopts the chain transmission, the material taking chain bucket is installed between two chains, and the driving device drives the chain to drive the chain bucket to move. This transmission mode has high requirements for the performance of the chain, and the chain is easy to be damaged and needs to be replaced regularly, so the maintenance cost is high.

[0134] Preferably, the material taking device provided by the embodiment can directly participate in transmission by the hopper back plate 113 of the hopper 111, cancel the traditional chain transmission, utilize the connecting plate and the hopper back plate transmission, connect the hoppers by the connecting plate, and make the hopper become a part of the transmission. The hopper is not only the working mechanism for digging the material, but also participates in the transmission as a part of the hopper chain, thereby increasing the stress area and improving the reliability.

[0135] Preferably, the driving sprocket and the deflection sprocket act on the connecting plate, the connecting plate is connected with the pin shaft on the back plate, and the connecting plate is outside the hopper, so that the connecting plate does not interfere with the hopper during driving and deflection. The connecting plate is made of high-strength material to ensure the reliability during driving and deflection.

[0136] Obviously, the above embodiments are only examples for clearly illustrating, and are not limited to the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. All the embodiments do not need to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A ship unloader with a boom lifting system, comprising a door leg (11), a boom (601) and a chain bucket arm, wherein the chain bucket arm is connected to the boom (601), characterized in that: It also includes a boom (601) lifting system, the boom (601) lifting system including: A traction mechanism (602) is provided on the arm (601); A pulley assembly (603) comprising a first pulley (6031), wherein the first pulley (6031) is connected to the top of the door leg (11); A transmission member (604), one end of which is connected to the traction mechanism (602), and the other end of which passes around the first pulley (6031) and is connected to the arm (601); A mounting frame (607) is connected to the arm frame (601) and forms a closed mounting cavity with the side of the arm frame (601), wherein the mounting cavity is movably sleeved on the outer periphery of the door leg (11); A rolling structure (605), one end of which is connected to the arm (601) and / or the mounting frame (607), and the other end of which is in rolling engagement with the door leg (11); The material taking device includes a bucket chain adapted to operate relative to the chain bucket arm, the bucket chain being formed by alternately connecting buckets and connecting plates; the chain bucket arm is hinged to the arm frame via a rotary shaft, the bucket chain is provided on the outer peripheral side of the chain bucket arm, and the force direction of the bucket chain when digging materials is parallel to the rotary plane of the chain bucket arm; The mounting frame (607) comprises: First mounting arm (6071); a second mounting arm (6072), one end of which is connected to one end of the first mounting arm (6071) at an angle, and the other end of which is connected to the side of the arm support (601); The third mounting arm (6073) has one end connected to the other end of the first mounting arm (6071) at an angle, and the other end connected to the side of the arm support (601).

2. The ship unloader with a boom lifting system according to claim 1, characterized in that: The second mounting arm (6072) and the third mounting arm (6073) are both welded to the side of the arm support (601).

3. The ship unloader with a boom lifting system according to claim 1, characterized in that: The second mounting arm (6072) and the third mounting arm (6073) are both vertically connected to the first mounting arm (6071).

4. The ship unloader with a boom lifting system according to any one of claims 1 to 3, characterized in that: The first mounting arm (6071), the second mounting arm (6072), the third mounting arm (6073) and the side of the arm frame (601) are respectively connected to at least one rolling structure (605).

5. The ship unloader with a boom lifting system according to any one of claims 1 to 3, characterized in that: The rolling structure (605) comprises a roller (6051), wherein the roller (6051) is arranged in the installation cavity, rotatably connected to the cavity wall of the installation cavity, and rollingly engaged with the door leg (11).

6. The ship unloader with a boom lifting system according to claim 5, characterized in that: The rolling structure (605) further comprises an elastic damping member (6052), and the roller (6051) is connected to the cavity wall of the installation cavity via the elastic damping member (6052).

7. The ship unloader with a boom lifting system according to claim 5, characterized in that: The door leg (11) is provided with a guide rail (1101) that cooperates with the roller (6051), and the roller (6051) is suitable for rising and falling along the guide rail (1101).

8. The ship unloader with a boom lifting system according to any one of claims 1 to 3, characterized in that: At least one locking structure (606) is installed on each of the second mounting arm (6072) and the third mounting arm (6073), and the locking structure (606) is used to lock the door leg (11) from two opposite sides of the door leg (11).

9. The ship unloader with a boom lifting system according to any one of claims 1 to 3, characterized in that: The pulley assembly (603) further includes a second pulley (6032), which is connected to the arm (601). One end of the transmission member (604) is connected to the traction mechanism (602), and the other end is connected to the arm (601) after passing through the second pulley (6032) and the first pulley (6031).

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