An all-electric drive type scraper en masse ship unloader

Abstract

The utility model belongs to port machinery technical field, concretely relates to a full electric drive formula buried scraper ship unloader, including door machine, rotary table, arm support steel structure, winch type arm support pitch mechanism, electric drive vertical buried scraper elevator, winch type vertical scraper swing mechanism, electric drive arm support buried scraper conveyor, center blanking chute and electric drive door frame buried scraper conveyor, arm support steel structure is hinged on rotary table, winch type arm support pitch mechanism includes pitch drive arrangement, pitch fixed pulley group and pitch movable pulley group, and pitch drive arrangement reeling pitch steel wire rope winding mechanism makes the front section of arm support steel structure rise, and winch type vertical scraper swing mechanism includes reset spring mechanism, and reset spring mechanism acts on the front section of arm support steel structure to make the lower section of electric drive vertical buried scraper elevator swing back. The technical problem of high requirement for operation and maintenance personnel, high cost and high energy consumption caused by adopting hydraulic drive in the prior art ship unloader is solved.

Description

Technical Field

[0001] This utility model belongs to the field of port machinery, specifically relating to a fully electric drive buried scraper unloader. Background Technology

[0002] The buried scraper unloader is an important unloading equipment at grain terminals both domestically and internationally. During operation, the entire process of unloading, lifting, transferring, and finally entering the terminal's conveying system is carried out in a closed space. Compared with intermittent unloading equipment such as gantry unloaders and grab unloaders, the buried scraper unloader has significant advantages such as light weight (approximately 45% to 55% of the weight of a grab unloader at the same productivity), energy saving, environmental protection, and fully sealed conveying. It is the optimal unloading equipment to completely replace the former at grain terminals.

[0003] The existing buried scraper unloaders all use hydraulic drive for their boom slewing mechanism, boom pitching mechanism, vertical scraper swing mechanism, and vertical buried scraper elevator. The installed power of the whole machine is relatively large and the energy consumption for unloading is relatively high.

[0004] The disadvantages of hydraulically driven ship unloaders are as follows:

[0005] 1) Routine maintenance requires a dedicated hydraulics team, which is highly specialized and difficult to repair;

[0006] 2) The hydraulic system has high pressure, and leakage is inevitable at hydraulic pipes and joints, which can cause some contamination to equipment and grain.

[0007] 3) The hydraulic components, including hydraulic pumps, valves, hydraulic motors, and hydraulic cylinders, have high procurement costs. The hydraulic components and hydraulic systems used in the buried scraper unloader are mostly imported brands, which increases the manufacturing cost of the unloader.

[0008] 4) The energy conversion efficiency of the hydraulic system is not high. Specifically, the efficiency of the hydraulic system of the buried scraper unloader is less than 70%, which is only 70% compared to the direct drive scheme of motor and reducer. The hydraulic transmission starts from the motor driving the hydraulic pump, and then transmits energy to the actuator hydraulic motor and hydraulic cylinder through the control valve and pipeline system. In this process, mechanical energy is converted into pressure energy and pressure energy is converted into mechanical energy twice. During the conversion, some energy is lost in the form of heat. The hydraulic station is the hottest area in the entire unloader. The hydraulic station needs to be equipped with a forced heat exchanger to cool the hydraulic system. Utility Model Content

[0009] To address the technical problems of high requirements for maintenance personnel, high costs, and high energy consumption caused by the use of hydraulic transmission in existing ship unloaders, this application proposes a fully electric-driven buried scraper ship unloader, which solves the above-mentioned technical problems.

[0010] The technical solution adopted by this utility model to solve its technical problem is:

[0011] This utility model provides a fully electric-driven buried scraper unloader, comprising: a gantry crane, which is configured on the shore; a turntable, which is rotatably mounted on the gantry crane via a fully electric-driven electric boom slewing mechanism. Two sets of the electric boom slewing mechanism are symmetrically arranged on both sides of a large slewing bearing at the bottom of the turntable. Each electric boom slewing mechanism includes a drive motor, a planetary reducer, an extension shaft, and a transmission pinion mounted on the gantry crane. The drive motor is directly connected to the planetary reducer. The extension shaft is configured at the output ends of the drive motor and the planetary reducer. The transmission pinion is fixed on the extension shaft and meshes with the external gear ring of the large slewing bearing to achieve the slewing motion of the turntable; and a boom. A steel structure, wherein the boom steel structure is hinged to a hinge seat on the top of the turntable, and a fully electrically driven winch-type boom pitching mechanism is configured between the rear section of the boom steel structure and the turntable; the winch-type boom pitching mechanism includes a pitching drive device and a pitching fixed pulley block configured on the turntable, and a pitching movable pulley block configured on the rear section of the boom steel structure, wherein a pitching wire rope winding mechanism on the pitching drive device passes sequentially through the pitching movable pulley block and the pitching fixed pulley block, and the pitching drive device winds up the pitching wire rope winding mechanism to tilt the front section of the boom steel structure up; an electrically driven vertical scraper jacking machine, wherein the electrically driven vertical scraper jacking machine is fully electrically driven, and the electrically driven vertical scraper jacking machine is fully electrically driven, and the electric drive vertical scraper jacking mechanism ... The lower section of the direct-buried scraper elevator extends into the hull to transport materials on the hull. The casing of the electrically driven vertical scraper elevator is vertically hinged to the front end of the front section of the boom steel structure. A fully electrically driven winch-type vertical scraper swing mechanism is configured between the upper section of the electrically driven vertical scraper elevator and the front section of the boom steel structure. The winch-type vertical scraper swing mechanism includes a swing drive device and a swing fixed pulley block configured on the front section of the boom steel structure, and a swing movable pulley block configured on the upper section of the electrically driven vertical scraper elevator. The swing wire rope winding mechanism on the swing drive device passes sequentially through the swing movable pulley block and the swing fixed pulley block. A winding and oscillating wire rope winding mechanism causes the lower section of the winch-type vertical scraper oscillating mechanism to swing forward away from the shore. Simultaneously, the winch-type vertical scraper oscillating mechanism also includes a return spring mechanism. One end of the return spring mechanism is hinged to the upper section of the winch-type vertical scraper oscillating mechanism, and the other end is hinged to the front section of the boom steel structure. The return spring mechanism acts on the front section to cause the lower section to swing backward. An electrically driven boom-mounted scraper conveyor is also included. This electrically driven boom-mounted scraper conveyor is fully electrically driven and is positioned at the front section of the boom steel structure to receive materials transported from the ship by the electrically driven vertical scraper elevator and transport the materials to the central discharge chute.A central discharge chute, vertically positioned at the center of the turntable and extending to the gantry crane, conveys material to an electrically driven gantry scraper conveyor within the gantry crane. The electrically driven gantry scraper conveyor is fully electrically driven and, upon receiving material, conveys it to the conveyor system at the dock.

[0012] Furthermore, the hoist-type boom pitch mechanism adopts a motor reducer transmission, wherein the pitch drive device includes a pitch drive drum, the first end of which is the active end, which is driven by a pitch motor through a pitch reducer. The output shaft of the pitch motor and the input shaft of the pitch reducer are connected by a coupling, and a circumferentially expanding brake chuck is formed on the coupling, and a high-speed brake is engaged on the chuck.

[0013] Furthermore, the second end of the pitch drive drum is the driven end, which is supported and disposed on the turntable by the first bearing. A circumferentially expanding locking disc is formed on the driven end, and a safety brake is engaged on the locking disc.

[0014] Furthermore, the swing drive device includes a swing drive drum, the active end of which is driven by a three-in-one reducer, and the driven end of which is supported on the boom steel structure by a second bearing.

[0015] Furthermore, the bottom of the gantry crane is equipped with a trolley traveling mechanism, which travels on a parallel track on the shore.

[0016] Furthermore, a triangular tower is disposed above the hinge point between the boom steel structure and the turntable. The triangular tower is fixed to the top of the boom steel structure. A front tie rod and a rear tie rod are disposed on the top of the triangular tower. One end of the front tie rod is hinged to the front section of the boom steel structure, and the other end of the front tie rod is hinged to the triangular tower. One end of the rear tie rod is hinged to the rear section of the boom steel structure, and the other end of the rear tie rod is hinged to the triangular tower.

[0017] Furthermore, the rear end of the rear section of the boom steel structure is formed as a counterweight end.

[0018] Furthermore, the drive device of the electric drive vertical buried scraper elevator includes a two-in-one motor reducer and a transmission sprocket, wherein the two-in-one motor reducer directly drives the transmission sprocket.

[0019] Based on the above technical solution, the technical effects that this utility model can achieve are as follows:

[0020] This utility model discloses a fully electric-driven buried scraper unloader. The swing of the electric-driven boom rotation mechanism and the electric-driven vertical buried scraper elevator at the execution end is driven by a fully electric winch-type vertical scraper swing mechanism. The boom steel structure where the electric-driven vertical buried scraper elevator is located is also driven by a fully electric winch-type boom pitching mechanism, thereby reducing the use of hydraulic transmission mechanisms. Furthermore, the electric-driven vertical buried scraper elevator, the electric-driven boom buried scraper conveyor, and the electric-driven gantry buried scraper conveyor all use fully electric drive to replace hydraulic transmission. The installed power and energy consumption of each mechanism are only 70% of those of hydraulic transmission, resulting in significant energy savings and avoiding the technical problems of high requirements for maintenance personnel, high costs, and high energy consumption caused by the use of hydraulic transmission.

[0021] The fully electric drive buried scraper unloader of this utility model has an electric transmission boom rotation mechanism in which the drive motor directly drives the planetary reducer and the transmission pinion, without using a hydraulic motor.

[0022] The fully electric buried scraper unloader of this utility model has a winch-type boom pitching mechanism that uses a wire rope winch. The pitching drive device includes a pitching motor, a pitching reducer, a pitching drive drum, a high-speed brake, and a safety brake, and does not use a hydraulic cylinder.

[0023] The fully electric drive buried scraper unloader of this utility model uses a geared motor to drive the wire rope drum for transmission in its winch-type vertical scraper swing mechanism. The winch-type vertical scraper swing mechanism includes a return spring mechanism, a swing drive device, a swing fixed pulley block, a swing movable pulley block and a swing wire rope winding mechanism, and does not use a hydraulic cylinder.

[0024] The fully electric drive buried scraper unloader of this utility model has an electric transmission vertical buried scraper elevator that uses a two-in-one motor reducer to directly drive the transmission sprocket, instead of using an expensive low-speed, high-torque hydraulic motor. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the all-electric drive buried scraper unloader of this utility model;

[0026] Figure 2 for Figure 1 A partially enlarged schematic diagram of the winch-type boom pitching mechanism;

[0027] Figure 3 This is a partial schematic diagram of the pitch drive device of a winch-type boom pitch mechanism;

[0028] Figure 4 A schematic diagram of the rope winding mechanism for the pitching wire rope of a winch-type boom;

[0029] Figure 5 This is a schematic diagram of the slewing mechanism between the turntable and the gantry crane;

[0030] Figure 6 This is a partial schematic diagram of the swing drive device of the winch-type vertical scraper swing mechanism;

[0031] Figure 7 A schematic diagram of the wire rope winding mechanism of the winch-type vertical scraper swing mechanism;

[0032] Figure 8 This is a schematic diagram of the electric drive vertical buried scraper elevator of the fully electric driven buried scraper unloader of this utility model in the forward swing 25° state.

[0033] Figure 9 This is a schematic diagram of the electrically driven vertical scraper lifter of the all-electrically driven buried scraper unloader of this utility model, which is in a vertical state without swinging.

[0034] Figure 10 This is a schematic diagram of the electrically driven vertical scraper lifter of the fully electric-driven scraper unloader of this utility model in the 25° backward swing state.

[0035] Among them: 1-Gantry, 11-Electrical room, 12-Electric drive boom slewing mechanism, 121-Drive motor, 122-Planetary reducer, 123-Extended shaft, 124-Transmission pinion, 13-Trolley traveling mechanism;

[0036] 2-Turntable, 21-Cab, 22-Slewing bearing, 221-External gear ring;

[0037] 3-Boom steel structure, 31-Triangular tower, 32-Front tie rod, 33-Rear tie rod, 34-Counterweight end;

[0038] 4- Hoist-type boom pitch mechanism, 41- Pitch drive device, 411- Pitch motor, 412- Pitch reducer, 412- Coupling, 4121- Brake chuck, 413- High-speed brake, 414- First bearing support, 415- Locking disc, 416- Safety brake, 417- Pitch drive drum, 42- Pitch fixed pulley block, 43- Pitch movable pulley block, 44- Pitch wire rope winding mechanism, 45- Balance wheel block;

[0039] 5-Electric drive vertical buried scraper elevator;

[0040] 6-Winding vertical scraper swing mechanism, 61-Swing drive device, 611-Three-in-one reducer, 612-Second bearing support, 613-Swing drive drum, 62-Swing fixed pulley block, 63-Swing moving pulley block, 64-Swing wire rope winding mechanism, 65-Reset spring mechanism;

[0041] 7-Electric drive boom buried scraper conveyor;

[0042] 8-Center discharge chute;

[0043] 9-Electric drive gantry scraper conveyor; 91-Dust removal system. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0045] like Figure 1-10As shown, this utility model provides a fully electric driven buried scraper unloader, including a gantry crane 1, a turntable 2, a boom steel structure 3, a winch-type boom pitching mechanism 4, an electric drive vertical buried scraper elevator 5, a winch-type vertical scraper swing mechanism 6, an electric drive boom buried scraper conveyor 7, a central discharge chute 8, and an electric drive gantry buried scraper conveyor 9. The gantry crane 1 is configured on the shore and is equipped with an electrical room 11 and its electrical control system. The turntable 2 is rotatably configured on the gantry crane 1 and is rotatably configured on the gantry crane 1 via a fully electric driven boom slewing mechanism 12. There are two sets of electric drive boom slewing mechanisms 12, symmetrically arranged on both sides of the slewing bearing 22 at the bottom of the turntable 2. The electric drive boom slewing mechanism 12 includes components configured on the gantry crane... The turntable 2 is equipped with a drive motor 121, a planetary reducer 122, an extension shaft 123, and a transmission pinion 124. The drive motor 121 is directly connected to the planetary reducer 122. The extension shaft 123 is located at the output end of the drive motor 121 and the planetary reducer 122. The transmission pinion 124 is fixed on the extension shaft 123 and meshes with the external gear ring 221 of the slewing bearing 22 to achieve the rotational movement of the turntable 2. The turntable 2 is equipped with a driver's cab 21. The top of the turntable 2 is equipped with a hinge seat. The boom steel structure 3 is hinged to the hinge seat, and the boom steel structure 3 is divided into a front section for conveying materials and a rear section for adjusting the pitch of the front section, with the hinge point as the dividing point. The center of gravity of the boom steel structure 3 is located in the front section so that the front section is in a downward position in its natural state, and the rear section... A fully electrically driven winch-type boom pitching mechanism 4 is configured between the turntable 2 and the boom 2. The winch-type boom pitching mechanism 4 includes a pitching drive device 41, a pitching fixed pulley block 42, and a pitching movable pulley block 43 configured on the rear section, all mounted on the turntable 2. The pitching wire rope winding mechanism 44 on the pitching drive device 41 passes sequentially through the pitching movable pulley block 43 and the pitching fixed pulley block 42. The pitching drive device 41 winds up the pitching wire rope winding mechanism 44 to raise the front section. A fully electrically driven electric vertical scraper elevator 5 extends into the hull to transport materials on the hull. The cover of the electric vertical scraper elevator 5 is vertically hinged to the front end of the boom steel structure 3. The cover is divided into a lower section inserted into the hull and a section for adjusting the pitch of the lower section, with the hinge point as the dividing point. The upper section of the boom steel structure 3 is connected to the front section of the boom steel structure 3 by a winch-type vertical scraper swing mechanism 6. The winch-type vertical scraper swing mechanism 6 includes a swing drive device 61 and a swing fixed pulley group 62 on the front section, and a swing movable pulley group 63 on the upper section. The swing drive device 61 is installed in the middle and rear part of the boom steel structure 3. The swing wire rope winding mechanism 64 of the swing drive device 61 passes through the swing movable pulley group 63 and the swing fixed pulley group 62 in sequence. The swing drive device 61 winds up the swing wire rope winding mechanism 64 to make the lower section swing forward away from the shore. At the same time, the winch-type vertical scraper swing mechanism 6 also includes a return spring mechanism 65. One end of the return spring mechanism 65 is hinged to the upper section, and the other end is hinged to the front section.A return spring mechanism 65 acts on the front section to cause the lower section to swing backward. The return spring mechanism 65 employs a sliding rod guide sleeve structure. The electrically driven boom-mounted scraper conveyor 7 is positioned at the front section of the boom steel structure 3 to receive materials transported from the ship's hull by the electrically driven vertical scraper elevator 5, and transports the materials to the central discharge chute 8. The central discharge chute 8 is vertically positioned at the center of the turntable 2 and extends to the gantry crane 1 to convey materials to the gantry-mounted scraper conveyor within the gantry crane 1. The fully electrically driven gantry-mounted scraper conveyor 9 receives the materials and then transports them to the material receiving point on the shore.

[0046] like Figure 8-10 As shown, for the electric drive vertical scraper elevator 5, when the swing drive drum 613 rotates clockwise, the pitch wire rope winding mechanism 44 winds into the swing drive drum 613, the distance between the swing movable pulley block 63 and the swing fixed pulley block 62 shortens, and the lower section of the electric drive vertical scraper elevator 5 swings outward; when the swing drive drum 613 rotates counterclockwise, the swing drive drum 613 releases the pitch wire rope winding mechanism 44, the distance between the swing movable pulley block 63 and the swing fixed pulley block 62 increases, and the lower section of the electric drive vertical scraper elevator 5 swings inward. The states of each swing angle are summarized in the table below:

[0047]

[0048] Prior to this, the boom steel structure 3 adopts a wide truss structure, which places the electric drive boom buried scraper conveyor 7 inside the truss for easy maintenance and high safety.

[0049] In a specific embodiment of this utility model, the winch-type boom pitch mechanism 4 is driven by a motor reducer. Specifically, the pitch drive device 41 includes a pitch drive drum 417. The first end of the pitch drive drum 417 is the active end, which is driven by the pitch motor 411 through the pitch reducer 4111. The output shaft of the pitch motor 411 and the input shaft of the pitch reducer 4111 are connected by a coupling 412. A circumferentially expanding brake chuck 4121 is formed on the coupling 412, and a high-speed brake 413 is engaged on the chuck to lock in time when the boom steel structure 3 is pitched to the desired position.

[0050] In a specific embodiment of this utility model, the second end of the pitch drive drum 417 is the driven end. The driven end is mounted on the turntable 2 by the first bearing support 414. A circumferentially expanding locking disc 415 is formed on the driven end. A safety brake 416 is engaged on the locking disc 415 to lock the pitch drive drum 417 when the ship unloader stops working, so that the boom steel structure 3 is stationary after the machine stops, ensuring safety.

[0051] In one specific embodiment of this utility model, a balance wheel assembly 45 is also provided in the middle of the pitch pulley assembly 43 to adjust the balance.

[0052] In one specific embodiment of the present invention, the swing drive device 61 includes a swing drive drum 613. The active end of the swing drive drum 613 is driven by a three-in-one reducer 611, and the driven end of the swing drive drum 613 is mounted on the boom steel structure 3 by a second bearing support 612.

[0053] In one specific embodiment of this utility model, the bottom end of the gantry crane 1 is equipped with a trolley traveling mechanism 13, which travels on a parallel track on the shore.

[0054] In one specific embodiment of this utility model, the electric drive gantry scraper conveyor 9 is equipped with a dust removal system 91, which not only removes the dust caused by the material falling at the central discharge chute 8, but also adjusts the positive and negative pressure difference inside the electric drive gantry scraper conveyor 9.

[0055] In a specific embodiment of this utility model, the fully electric drive buried scraper unloader of this utility model adopts a special triangular tower 31 truss combination structure for its boom steel structure 3, instead of a simple truss structure. A triangular tower 31 is arranged above the hinge point between the boom steel structure 3 and the turntable 2. The triangular tower 31 is fixed to the top of the boom steel structure 3. A front tie rod 32 and a rear tie rod 33 are arranged on the triangular tower 31. One end of the front tie rod 32 is hinged to the front section of the boom steel structure 3, and the other end of the front tie rod 32 is hinged to the triangular tower 31. One end of the rear tie rod 33 is hinged to the rear section of the boom steel structure 3, and the other end of the rear tie rod 33 is hinged to the triangular tower 31.

[0056] Furthermore, the rear end of the boom steel structure 3 is formed as a counterweight end 34. The counterweight is placed at the rear end of the boom steel structure 3, and the rear tie rod 33 passes through the center of gravity of the counterweight. In this way, the concentrated load can be decomposed into the tension force on the rear tie rod 33 and the pressure force on the boom steel structure 3, so that each member of the boom steel structure 3 bears the axial force, which can give full play to the mechanical properties of the material and thus minimize the self-weight of the boom steel structure 3.

[0057] In one specific embodiment of this utility model, the drive device of the electric drive vertical buried scraper elevator 5 includes a two-in-one motor reducer and a transmission sprocket, and the two-in-one motor reducer directly drives the transmission sprocket.

[0058] This utility model of a fully electric buried scraper unloader does not require a dedicated hydraulic team for daily maintenance, making maintenance simple and cost-effective.

[0059] This utility model of a fully electric-driven buried scraper unloader avoids the need for high-cost purchased components such as hydraulic pumps, valves, hydraulic motors, and hydraulic cylinders. It uses the most common and universal components to achieve universal functions, thus reducing manufacturing costs.

[0060] It should be understood that the specific embodiments described above are only for explaining the present invention and are not intended to limit the present invention. Obvious variations or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A fully electric-driven buried scraper unloader, characterized in that, include: A gantry crane (1) is located on the shore. Turntable (2), the turntable (2) is rotatably mounted on the gantry (1) via an all-electric drive boom slewing mechanism (12). There are two sets of the electric drive boom slewing mechanism (12), which are symmetrically arranged on both sides of the slewing bearing (22) at the bottom of the turntable (2). The electric drive boom slewing mechanism (12) includes a drive motor (121), a planetary reducer (122), an extension shaft (123) and a transmission pinion (124) mounted on the gantry (1). The drive motor (121) is directly connected to the planetary reducer (122). The extension shaft (123) is mounted at the output end of the drive motor (121) and the planetary reducer (122). The transmission pinion (124) is fixed on the extension shaft (123) and meshes with the outer gear ring (221) of the slewing bearing (22) to realize the slewing motion of the turntable (2). A boom steel structure (3) is hinged to a hinge seat on the top of the turntable (2). A fully electric drive winch-type boom pitching mechanism (4) is configured between the rear section of the boom steel structure (3) and the turntable (2). A winch-type boom pitch mechanism (4) includes a pitch drive device (41) and a pitch fixed pulley block (42) configured on the turntable (2), and a pitch movable pulley block (43) configured on the rear section of the boom steel structure (3). The pitch wire rope winding mechanism (44) on the pitch drive device (41) passes through the pitch movable pulley block (43) and the pitch fixed pulley block (42) in sequence. The pitch drive device (41) winds up the pitch wire rope winding mechanism (44) to make the front section of the boom steel structure pitch up. An electric drive vertical scraper elevator (5) is fully electric driven. The lower section of the electric drive vertical scraper elevator (5) extends into the hull to transport materials on the hull. The cover of the electric drive vertical scraper elevator (5) is vertically hinged to the front end of the front section of the boom steel structure (3). A fully electric drive winch-type vertical scraper swing mechanism (6) is configured between the upper section of the electric drive vertical scraper elevator (5) and the front section of the boom steel structure (3). A winch-type vertical scraper swing mechanism (6) includes a swing drive device (61) and a swing fixed pulley block (62) configured on the front section of the boom steel structure (3), and a swing movable pulley block (63) configured on the upper section of the electric drive vertical scraper hoist (5). The swing wire rope winding mechanism (64) on the swing drive device (61) passes through the swing movable pulley block (63) and the swing fixed pulley block (62) in sequence. (61) A winding swing wire rope winding mechanism (64) is used to make the lower section of the winch-type vertical scraper swing mechanism (6) swing forward away from the shore. At the same time, the winch-type vertical scraper swing mechanism (6) also includes a return spring mechanism (65). One end of the return spring mechanism (65) is hinged to the upper section of the winch-type vertical scraper swing mechanism (6), and the other end is hinged to the front section of the boom steel structure (3). The return spring mechanism (65) acts on the front section to make the lower section swing backward. The electric drive boom buried scraper conveyor (7) is fully electric driven. The electric drive boom buried scraper conveyor (7) is arranged at the front of the boom steel structure (3) to receive the material transported from the hull by the electric drive vertical buried scraper elevator (5) and transport the material to the central discharge chute (8). A central discharge chute (8) is vertically disposed at the center of the turntable (2) and extends to the gantry crane (1) to convey materials to the electric drive gantry scraper conveyor (9) inside the gantry crane (1). The electric drive gantry scraper conveyor (9) is fully electric driven. After receiving the material, the electric drive gantry scraper conveyor (9) transports the material to the conveyor system of the dock.

2. The all-electric drive buried scraper unloader according to claim 1, characterized in that, The winch-type boom pitch mechanism (4) is driven by a motor reducer. The pitch drive device (41) includes a pitch drive drum (417). The first end of the pitch drive drum (417) is the active end. The active end is driven by a pitch motor (411) through a pitch reducer (4111). The output shaft of the pitch motor (411) and the input shaft of the pitch reducer (4111) are connected by a coupling (412). A circumferentially expanding brake chuck (4121) is formed on the coupling (412), and a high-speed brake (413) is engaged on the chuck.

3. The all-electric drive buried scraper unloader according to claim 2, characterized in that, The second end of the pitch drive drum (417) is the driven end. The driven end is supported by the first bearing (414) and disposed on the turntable (2). A circumferentially expanding locking disc (415) is formed on the driven end, and a safety brake (416) is engaged on the locking disc (415).

4. The all-electric drive buried scraper unloader according to claim 1, characterized in that, The swing drive device (61) includes a swing drive drum (613), the active end of which is driven by a three-in-one reducer (611), and the driven end of which is supported by a second bearing (612) and mounted on the boom steel structure (3).

5. The all-electric drive buried scraper unloader according to claim 1, characterized in that, A triangular tower (31) is arranged above the hinge point between the boom steel structure (3) and the turntable (2). The triangular tower (31) is fixed to the top of the boom steel structure (3). A front tie rod (32) and a rear tie rod (33) are arranged on the top of the triangular tower (31). One end of the front tie rod (32) is hinged to the front section of the boom steel structure (3), and the other end of the front tie rod (32) is hinged to the triangular tower (31). One end of the rear tie rod (33) is hinged to the rear section of the boom steel structure (3), and the other end of the rear tie rod (33) is hinged to the triangular tower (31).

6. The all-electric drive buried scraper unloader according to claim 1, characterized in that, The rear end of the rear section of the boom steel structure (3) is formed as a counterweight end (34).

7. The all-electric drive buried scraper unloader according to claim 1, characterized in that, The drive device of the electric vertical buried scraper elevator (5) includes a two-in-one motor reducer and a transmission sprocket, wherein the two-in-one motor reducer directly drives the transmission sprocket.

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