Operation type marine tower drum hanging seat auxiliary crane

Abstract

The utility model discloses an operation type marine tower lifting seat auxiliary crane device. The operation type marine tower lifting seat auxiliary crane device comprises a telescopic mechanism, a lifting mechanism, a rotary supporting mechanism and a hoisting mechanism which are arranged on a crane rack, the crane rack comprises a main arm arranged on the stand column and an auxiliary arm stretching out and drawing back relative to the main arm. The telescopic mechanism comprises a telescopic oil cylinder fixed on the main arm, and a movable push rod of the telescopic oil cylinder is connected with the auxiliary arm; the rotary supporting mechanism comprises a motor, a rotary bearing and a bearing cylinder; the pivotal bearing is arranged between the bearing cylinder and the column; the motor is fixed in the bearing cylinder; the output shaft end of the motor is connected with the stand column; the lifting mechanism comprises a lifting oil cylinder which is obliquely arranged and is connected between the main arm and the stand column, and the hoisting mechanism is arranged at the lifting hook end of the auxiliary arm; according to the operation type marine tower drum hanging seat auxiliary crane, the stay period of a transport ship is effectively shortened, the safety and stability of the hanging seat in the installation process can be guaranteed, the problem that the time for installing the tower drum hanging seat is too long is effectively solved, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary lifting devices for transport ships in offshore wind power installation projects, in particular to a running ship tower hanger auxiliary crane. Background Art

[0002] A marine crane is a specialized machine installed on a ship's deck, used for loading and unloading cargo. In recent years, with the rapid development of the offshore wind power industry, the performance of wind turbine installation vessels has also improved. During tower installation, the wind turbine installation vessel no longer needs to transfer the tower to the deck and then flip it over. Instead, the process is performed directly on the tower transport vessel. Currently, during the lifting process, the transport vessel must berth with the platform vessel's positioning vessel or perform four-anchor positioning on its own. Once the transport vessel is berthed or the four-anchor positioning is complete, it must maintain a distance of approximately ten meters from the platform vessel for the lifting process.

[0003] However, while platform vessels meet the requirements for lifting large wind turbine components, they also have their own limitations. During the tower lifting process, the ship crane usually lowers the wire rope or sling a certain distance while operating on the transport ship. If the ship crane is used directly to install the tower base, the base will swing too much during installation, missing the tower lifting window and requiring readjustment. This makes efficient installation impossible, resulting in low offshore operation efficiency, high operational risks, and high operating costs. In addition, due to the complex and changeable weather conditions at sea and the limited distance between the two ships, when the lifting and installation operation efficiency is low, the optimal installation time will be missed. The wind and waves at sea can easily cause collisions between ships, making it difficult to ensure operational safety.

[0004] Based on the above technical problems, it is necessary to design an auxiliary crane to cooperate with the tower hanger to ensure the orderly lifting of the tower. Utility Model Content

[0005] The purpose of the utility model is to provide a running ship tower crane auxiliary crane which solves the above technical problems.

[0006] To this end, the technical solution of this utility model is as follows:

[0007] A running ship tower crane auxiliary crane comprises a telescopic mechanism, a lifting mechanism, a slewing support mechanism and a lifting mechanism arranged on a crane frame; wherein the crane frame comprises a main arm, a jib and a column; the main arm is an inverted L-shaped arm body composed of a connected horizontal long arm and a vertical short arm, and an insertion hole is opened along the axial direction of the free end surface of the horizontal long arm; one end of the jib is horizontally inserted into the insertion hole of the horizontal long arm to perform telescopic movement relative to the horizontal long arm; the column is vertically arranged, and its top end is hingedly connected to the bottom end of the vertical short arm by a rotating pin shaft; the telescopic mechanism comprises a telescopic cylinder, which is horizontally arranged above the main arm in a manner that a movable push rod faces the other end of the jib, so that the cylinder barrel of the telescopic cylinder is fixed on the horizontal long arm and the movable push rod is fixed on the horizontal long arm. The end is fixed to the arm body near the other end of the auxiliary arm through a connecting piece; the slewing support mechanism includes a motor, a slewing bearing and a load-bearing cylinder; the load-bearing cylinder is a vertically arranged cylinder, and a connecting base plate is fixed at its bottom end; the slewing bearing is horizontally arranged above the load-bearing cylinder, and its bearing outer ring is fixed on the top surface of the load-bearing cylinder, and its bearing inner ring is fixed on the bottom surface of the column; the motor is fixed in the load-bearing cylinder with its output shaft facing vertically upward, and the output shaft end is connected to the bottom end of the column to drive the column to rotate; the lifting mechanism includes a lifting cylinder, which is obliquely arranged between the main arm and the column, the cylinder end of the lifting cylinder is hingedly connected to the bearing inner ring of the slewing bearing, and the movable push rod rod end is hingedly connected to the bottom side of the main arm; the lifting mechanism includes a hook, which is arranged at the other end of the auxiliary arm.

[0008] Furthermore, the lifting mechanism includes a winch, a lifting wire rope, a movable pulley and a fixed pulley; the fixed pulley is arranged at the other end of the auxiliary arm through a fixed pulley bracket, and the movable pulley is rotatably arranged below the fixed pulley through a movable pulley bracket, and both are arranged with their axes perpendicular to the side wall of the main arm; the hook is hingedly connected to the bottom end of the movable pulley bracket; the winch is fixed at the junction of the horizontal long arm and the vertical short arm of the main arm, and the central axis of its wire rope drum is located on the same horizontal plane as the central axis of the fixed pulley; one end of the lifting wire rope is fixed on the fixed pulley, and the other end passes around the movable pulley and the fixed pulley in turn, and then extends horizontally to the winch, and is wound around the wire rope drum of the winch.

[0009] Furthermore, the connecting piece on the auxiliary arm is a connecting ear plate fixed vertically on the auxiliary arm, and the height of the connecting ear plate is adapted to the position of the movable push rod of the electric telescopic cylinder, so that the movable rod end of the electric telescopic cylinder is hingedly connected to the connecting ear plate.

[0010] Furthermore, a load-bearing cylinder flange adapted to the bearing outer ring is provided on the top side of the load-bearing cylinder, so that the load-bearing cylinder and the bearing outer ring are connected and fixed as one by a plurality of fastening bolts passed through the load-bearing cylinder flange and the bearing outer ring along the circumferential direction; a column flange adapted to the bearing inner ring is provided on the bottom side of the column, so that the column and the bearing inner ring are connected and fixed as one by a plurality of fastening bolts passed through the load-bearing column flange and the bearing inner ring along the circumferential direction.

[0011] Furthermore, a plurality of stabilizing brackets are evenly distributed in the circumferential direction of the load-bearing cylinder, one end of each stabilizing bracket is fixed to the outer wall of the load-bearing cylinder, and the other end is fixed to a designated fixed position of the load-bearing cylinder.

[0012] Furthermore, a plurality of reinforcing ribs are evenly distributed in the circumferential direction of the load-bearing cylinder, and the reinforcing ribs are respectively fixed on the outer wall of the load-bearing cylinder and the top surface of the connecting bottom plate.

[0013] Furthermore, a limit stop is vertically arranged on the top surface of the inner ring of the slewing bearing, and its top surface is an inclined surface; the limit stop is arranged in a manner that the low position of the top inclined surface of the limit stop is adjacent to the column, and is located on both sides of the column together with the lifting cylinder; the height of the limit stop is adapted to the height of the column, and the inclination angle of the top inclined surface is adapted to the maximum set angle for the main arm to flip upward, so that when the main arm flips upward to the maximum set angle, the vertical short arm of the main arm rests on the top surface of the limit stop.

[0014] Furthermore, the load-bearing cylinder is fixed on one side of the load-bearing vehicle, and a counterweight box is fixed on the other side of the load-bearing vehicle opposite to the extension direction of the main arm, and a plurality of counterweight blocks are arranged in the counterweight box; a battery and a controller are arranged on the counterweight box; the controller is respectively connected to the drive motor, winch, telescopic cylinder and lifting cylinder to respectively control the working status of the drive motor, winch, telescopic cylinder and lifting cylinder; the battery is connected to each electrical device to supply power.

[0015] Furthermore, the load-bearing vehicle includes a horizontally arranged load-bearing base plate, and universal wheels with brake mechanisms are respectively installed at the four corners of the bottom surface; an inverted U-shaped load-bearing vehicle push frame is vertically fixed on the load-bearing base plate on one side of the counterweight box.

[0016] Compared with the existing technology, the tower crane auxiliary crane for operating ships is suitable for the lifting and installation process of tower cranes. It not only effectively shortens the stay period of the transport ship, but also can ensure the stability of the crane during the installation process, effectively avoids the problem of too long time to install the tower crane, meets the requirements of accurately controlling the lifting window period during the lifting period of large offshore components, and is conducive to improving work efficiency; in terms of safety, during the lifting process, the transport ship needs to berth the positioning ship of the platform ship or the transport ship to perform four-anchor positioning by itself. After the transport ship berths or the four-anchor positioning is completed, it needs to maintain a distance of about ten meters from the platform ship for lifting. However, the weather at sea is complex and changeable, and the distance between the two ships is limited, which is prone to collision risks. It effectively shortens the stay period of the transport ship, meets the requirements of accurately controlling the lifting window period during the lifting period of large offshore components, ensures the stability of the crane during the installation process, effectively avoids the problem of too long time to install the tower crane, and thus effectively improves construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a structural diagram of the operating ship-mounted tower crane auxiliary crane of the utility model;

[0018] Figure 2 This is a structural diagram of the main arm and auxiliary arm of the running ship tower crane auxiliary crane of the utility model;

[0019] Figure 3 This is a schematic structural diagram of the limit stopper of the running marine tower crane auxiliary crane of the utility model;

[0020] Figure 4 This is a schematic diagram of the main arm and auxiliary arm of the running marine tower crane auxiliary crane of the present invention raised to the highest angle. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, the following embodiments are by no means intended to limit the present invention in any way.

[0022] See also Figure 1 The operating marine tower crane auxiliary crane includes a telescopic mechanism, a lifting mechanism, a slewing support mechanism and a hoisting mechanism arranged on a crane frame.

[0023] The crane frame includes a main arm 5, a secondary arm 7 and a column 12; wherein,

[0024] The main arm 5 is an inverted L-shaped arm body, which is formed by a horizontal long arm and a vertical short arm whose top end is fixed to one end of the horizontal long arm. An axial channel is opened along the axial direction of the other end surface of the horizontal long arm, which serves as an insertion hole for the auxiliary arm 7; the column 12 is vertically arranged below the main arm 5, and a U-shaped through groove that matches the column 12 is opened at the bottom end of the vertical short arm, so that the top end of the column 12 is inserted into the U-shaped through groove at the bottom end of the vertical short arm, and the vertical short arm is hingedly connected to the top end of the column 12 by a rotating pin 3 that is sequentially horizontally penetrated through the wall of the U-shaped through groove and the column 12, thereby enabling the main arm 5 to be flipped up and down relative to the column 12;

[0025] The auxiliary arm 7 is an arm body with an outer diameter adapted to the inner diameter of the axial channel of the main arm 5, one end of which is an insertion end and the other end is a hook end; the auxiliary arm 7 is arranged horizontally, and its insertion end is partially inserted into the inner side of the horizontal long arm, so that the auxiliary arm 7 can perform telescopic movement in the horizontal direction relative to the main arm 5 to adjust the length of the lifting arm composed of the main arm 5 and the auxiliary arm 7; the hook end of the auxiliary arm 7 is exposed to the outside of the main arm 5 for installing the lifting mechanism.

[0026] The telescopic mechanism includes a telescopic cylinder 6, which is arranged along the setting direction of the horizontal long arm and is horizontally fixed on the top side of the main arm 5 with its movable push rod facing the hook end of the auxiliary arm 7; correspondingly, a connecting ear plate is provided on the top side of the arm body of the auxiliary arm 7 near the hook end, and the height of the connecting ear plate is adapted to the position of the movable push rod of the telescopic cylinder 6. The end of the movable rod of the telescopic cylinder 6 is fixed on the connecting ear plate to ensure that the auxiliary arm 7 always keeps reciprocating in the horizontal direction under the telescopic action of the movable push rod of the telescopic cylinder 6; wherein, the telescopic cylinder 6 adopts an electric telescopic cylinder, so that electric control can be directly realized through the controller.

[0027] The slewing support mechanism includes a motor 1, a slewing bearing 11 and a bearing cylinder 13; wherein,

[0028] The load-bearing cylinder 13 is a vertical cylindrical cylinder, and a connecting base plate is fixed to its bottom end, so that the load-bearing cylinder 13 is fixed at a designated position by anchor bolts passing through the connecting base plate along its circumferential direction;

[0029] The slewing bearing 11 is horizontally arranged above the bearing cylinder 13, with its outer ring fixed to the top surface of the bearing cylinder 13, and its inner ring fixed to the bottom surface of the column 12. Specifically, a bearing cylinder flange is provided on the top side of the bearing cylinder 13, which is adapted to the bearing outer ring. The bearing cylinder 13 and the bearing outer ring are connected and fixed as one body by a plurality of fastening bolts circumferentially passing through the bearing cylinder flange and the bearing outer ring. A column flange is provided on the bottom side of the column 12, which is adapted to the bearing inner ring. The column 12 and the bearing inner ring are connected and fixed as one body by a plurality of fastening bolts circumferentially passing through the bearing column flange and the bearing inner ring.

[0030] The motor 1 is fixed in the load-bearing cylinder 13 through the motor fixing frame with its output shaft facing vertically upward, and the end of its output shaft passes through the center hole of the bearing inner ring and is inserted and fixed in the blind hole opened on the bottom surface of the column 12, so that the motor 1 drives the column 12 to drive the main arm 5 and the auxiliary arm 7 to rotate synchronously; wherein, the load-bearing cylinder 13, the output shaft of the motor 1, the slewing bearing 11 and the column 12 are coaxially arranged.

[0031] As a preferred technical solution of this embodiment, a plurality of stabilizing brackets 19 are evenly distributed in the circumferential direction of the load-bearing cylinder 13, one end of which is welded or fixed to the outer wall of the load-bearing cylinder 13 by bolts, and the other end is welded or fixed to a designated fixed position of the load-bearing cylinder 13 by bolts, so as to enhance the stability of the overall structure of the crane; wherein, the stabilizing brackets 19 are fixed to the upper side or middle outer wall of the load-bearing cylinder 13.

[0032] As another preferred technical solution of this embodiment, a plurality of reinforcing ribs 14 are evenly distributed in the circumferential direction of the load-bearing cylinder 13. The reinforcing ribs 14 are specifically right-angled trapezoidal plates, and two edges perpendicular to each other are welded and fixed on the outer wall of the load-bearing cylinder 13 and the top surface of the connecting base plate, so as to enhance the structural strength and stability of the load-bearing cylinder 13.

[0033] The lifting mechanism includes a lifting cylinder 10, which is arranged between the main arm 5 and the column 12 at an angle of 45 degrees, so that the main arm 5, the column 12 and the lifting cylinder 10 form an isosceles right triangle in the initial state; the fixed end of the lifting cylinder 10 is fixed to the top surface of the inner ring of the slewing bearing 11, and the end of its movable push rod is fixed to the bottom side of the main arm 5 through the lower connecting ear plate, so that the main arm 5 can be flipped up and down relative to the column 12 under the telescopic drive of the lifting cylinder 10; wherein, the lifting cylinder 10 adopts an electric lifting cylinder, so that electric control can be directly achieved through the controller.

[0034] The lifting mechanism includes a winch 4, a lifting wire rope, a movable pulley, a fixed pulley 8 and a hook 9; wherein, the fixed pulley 8 is arranged at the hook end of the auxiliary arm 7 through a fixed pulley bracket, and the movable pulley is rotatably arranged below the fixed pulley through the movable pulley bracket, and both are arranged with their axes perpendicular to the side wall of the main arm 5; the hook 9 is hingedly connected to the bottom end of the movable pulley bracket; the winch 4 is fixed at the junction of the horizontal long arm and the vertical short arm of the main arm 5, and the central axis of its wire rope drum is located in the same horizontal plane as the central axis of the fixed pulley 8; one end of the lifting wire rope is fixed on the fixed pulley 8, and the other end passes around the movable pulley and the fixed pulley 8 in turn, and then extends horizontally to the winch 4, and is rolled up and wound around the wire rope drum of the winch 4, so as to control the lifting and lowering of the hook 9 by retracting and releasing the wire rope by the winch 4; wherein, the winch 4 adopts an electric winch, so that electric control can be directly achieved through the controller.

[0035] See also Figure 3The limit stopper 2 serves as a safety mechanism of the lifting device. Specifically, it is a stopper with an inclined top surface and vertically fixed on the top surface of the inner ring of the slewing bearing 11. It is arranged in a manner that the lower part of the inclined top surface is adjacent to the column 12 and is arranged on both sides of the column 12 with the lifting cylinder 10. The height of the limit stopper 2 is adapted to the height of the column 12, and the inclination angle of its top surface (i.e., the inclined surface) is adapted to the maximum setting angle of the main arm 5 to flip upward, so that the main arm 5 can be driven by the lifting cylinder 10. When flipped upward to the maximum set angle, the vertical short arm of the main arm 5 abuts against the top surface of the limit block 2; in this embodiment, the angle between the limit block 2 and the horizontal plane is 60°, corresponding to the maximum upward flipping angle of the main arm 5 is 60°, that is, when the main arm 5 flips upward 60° in actual operation, the vertical short arm of the main arm 5 abuts against the top surface of the limit block 2, limiting the main arm 5 from continuing to flip upward, that is, limiting the lifting height of the main arm 5, thereby preventing the main arm from tipping over due to the lifting height exceeding the limit.

[0036] In order to facilitate the movement of the small crane on the ship, the load-bearing cylinder 13 is fixed to a load-bearing vehicle 16 through a connecting base plate, and is specifically fixed to one side of the load-bearing vehicle 16; a counterweight box 17 is fixed on the other side of the load-bearing vehicle 16 (that is, the side opposite to the extension direction of the main arm 5) to counterweight the weight of the boom part and the weight of the object to be hoisted, so as to keep the load-bearing vehicle 16 in a load-bearing balance state at all times and prevent overturning; wherein, the load-bearing vehicle 16 includes a horizontally arranged load-bearing base plate, and universal wheels 15 are respectively installed at the four corners of its bottom surface. The universal wheels 15 specifically adopt universal wheels with brake mechanisms, so that the load-bearing vehicle 16 can be fixed to the designated lifting position; an inverted U-shaped load-bearing vehicle hand push frame is also vertically fixed on the load-bearing base plate on the side where the counterweight box 17 is provided, which is convenient for the operator to push and move. In this embodiment, according to the actual load conditions of the lifting operation and the length adjustment range of the boom, the counterweight box 17 is fully equipped with two counterweight blocks weighing 300 kg; during on-site operations, the counterweight weight can be in the range of 1000 kg to 1600 kg according to the weight of the object being lifted.

[0037] A battery 18 and a controller 20 are mounted on the counterweight box 17. The controller 20 is connected to the drive motor 1, hoist 4, telescopic cylinder 6, and lifting cylinder 10, respectively, to control their respective operating states. The battery 18 is connected to the drive motor 1, hoist 4, telescopic cylinder 6, lifting cylinder 10, and controller 20, respectively, to power the controller, the drive motor, hoist 4, telescopic cylinder 6, and lifting cylinder 10. In this embodiment, the battery 18 is a 100AH ​​lead-acid battery, which is maintenance-free, shock-resistant, high-temperature-resistant, compact, and has low self-discharge.

[0038] See also Figure 1 and Figure 4 The specific working process of the running ship tower crane auxiliary crane is as follows:

[0039] S1. Place a ballast block of appropriate weight in the ballast box according to the weight of the tower base to be hoisted. For example, if the weight of the tower base is about 400 kg, placing one ballast block in the ballast box can meet the ballast requirement for the hoisting.

[0040] S2. The platform ship crane transfers the small auxiliary crane to the transport ship and uses a load-bearing vehicle to push the small crane to the side of the tower flange surface and fix it; before use, the operator tests whether the small crane is operating normally;

[0041] S3. The operator controls the movable push rod of the telescopic cylinder through the controller to drive the jib to extend outward, and at the same time controls the winch to lower the hook head to the tower hanger position through the controller;

[0042] S4. The operator uses a short sling to connect the tower hanger to the hook head, and then uses the controller to control the movable push rods of the telescopic cylinder and the lifting cylinder to extend outward at the same time. The controller also controls the drive motor to cause the column to drive the main arm and the auxiliary arm to rotate to the direction of the tower hanger installation point. When the tower hanger is lifted to a position close to the tower hanger installation point, the controller is used to fine-tune the telescopic cylinder, the movable push rods of the lifting cylinder, and the rotation state of the drive motor, so that the tower hanger moves to the position opposite to the installation point and the assembly is completed.

[0043] S5. After the tower base is installed, the operator removes the short sling to separate the tower base from the hook. The operator then controls the electric telescopic cylinder and the electric lifting cylinder to retract simultaneously through the controller, and the main arm gradually flips downward to its initial position perpendicular to the column. Subsequently, the controller controls the drive motor to cause the column to drive the main arm and auxiliary arm to rotate back to their original positions, and finally the crane returns to its initial position.

[0044] S6. Move the load-bearing vehicle to move the crane to the installation position of the next tower hanger, and repeat the above steps S3 to S5 until the installation of all tower hangers is completed.

[0045] In the running marine tower crane auxiliary crane of this embodiment, the main arm 5, the auxiliary arm 7, the column 12 and the bearing cylinder 13 are preferably made of low-alloy structural steel (Q345 structural steel) with light weight and high strength; specifically, the horizontal long arm length of the main arm 5 is 4.5m, and the vertical short arm width is 0.45m; the auxiliary arm 7 is 4.14m long, and when the auxiliary arm 7 is initially inserted in the main arm 5, the total length of the two is 5.46m; the vertical cylinder 12 is a cylinder with a length of 1.2m and a diameter of 0.45m; the bearing cylinder 13 is a rotary mechanism installed on the column 12, with a length of 2.74m and a diameter of 0.55m; the telescopic cylinder 6 adopts an electric cylinder with a maximum stroke of 2.5m, and the lifting cylinder 10 adopts an electric cylinder with a maximum working stroke of 1.45m; in actual application, the two cooperate with each other, see Figure 4 When the cylinder strokes of the telescopic cylinder 6 and the lifting cylinder 10 both reach their maximum, the boom elevation angle is 60°, and the distance between the hook head and the deck surface is 10m; according to actual on-site applications, the hook's lowering range is 0.8m to 10.1m, the boom elevation angle range is 0° to 60°, the distance from the hook to the deck surface is 0m to 10.2m, and the rated load range is 150kg to 510kg, which meets the lifting and installation operations of wind turbine tower hangers of different specifications.

Claims

1. A running ship tower crane auxiliary crane, characterized in that: The invention comprises a telescopic mechanism, a lifting mechanism, a slewing support mechanism and a hoisting mechanism arranged on a crane frame; wherein the crane frame comprises a main arm (5), a jib (7) and a column (12); the main arm (5) is an inverted L-shaped arm body composed of a connected horizontal long arm and a vertical short arm, and a plug-in hole is opened along the axis direction of the free end surface of the horizontal long arm; one end of the jib (7) is horizontally inserted into the plug-in hole of the horizontal long arm to perform telescopic movement relative to the horizontal long arm; the column (12) is vertically arranged, and its top end is hingedly connected to the bottom end of the vertical short arm through a rotating pin shaft (3); the telescopic mechanism comprises a telescopic oil cylinder (6), which is horizontally arranged above the main arm (5) in a manner that a movable push rod faces the other end of the jib (7), so that the cylinder barrel of the telescopic oil cylinder (6) is fixed on the horizontal long arm and the rod end of the movable push rod is fixed to the arm body near the other end of the jib (7) through a connecting piece; The structure comprises a motor (1), a slewing bearing (11) and a bearing cylinder (13); the bearing cylinder (13) is a vertically arranged cylinder, and a connecting base plate is fixed at its bottom end; the slewing bearing (11) is horizontally arranged above the bearing cylinder (13), the outer ring of the bearing is fixed on the top surface of the bearing cylinder (13), and the inner ring of the bearing is fixed on the bottom surface of the column (12); the motor (1) is fixed in the bearing cylinder (13) with its output shaft facing vertically upward, and the end of the output shaft is connected to the bottom end of the column (12) to drive the column (12) to rotate; the lifting mechanism comprises a lifting cylinder (10), which is obliquely arranged between the main arm (5) and the column (12), the cylinder end of the lifting cylinder (10) is hingedly connected to the inner ring of the bearing of the slewing bearing (11), and the end of the movable push rod is hingedly connected to the bottom side of the main arm (5); the lifting mechanism comprises a hook (9), which is arranged at the other end of the auxiliary arm (7).

2. The operating ship tower crane auxiliary crane according to claim 1, characterized in that: The hoisting mechanism comprises a hoisting machine (4), a hoisting wire rope, a movable pulley and a fixed pulley (8); the fixed pulley (8) is arranged at the other end of the auxiliary arm (7) through a fixed pulley bracket, and the movable pulley is rotatably arranged below the fixed pulley through the movable pulley bracket, and both are arranged in a manner that the axis is perpendicular to the side wall of the main arm (5); the hook (9) is hingedly connected to the bottom end of the movable pulley bracket; the hoisting machine (4) is fixed at the junction of the horizontal long arm and the vertical short arm of the main arm (5), and the central axis of its wire rope drum is located on the same horizontal plane as the central axis of the fixed pulley (8); one end of the hoisting wire rope is fixed on the fixed pulley (8), and the other end passes around the movable pulley and the fixed pulley (8) in sequence, and then extends horizontally to the hoisting machine (4) and is wound around the wire rope drum of the hoisting machine (4) in a coil.

3. The operating ship tower crane auxiliary crane according to claim 1, characterized in that: The connecting piece on the auxiliary arm (7) is a connecting ear plate fixed vertically on the auxiliary arm (7), and the height of the connecting ear plate is adapted to the position of the movable push rod of the electric telescopic oil cylinder (6), so that the movable rod end of the electric telescopic oil cylinder (6) is hingedly connected to the connecting ear plate.

4. The operating ship tower crane auxiliary crane according to claim 1, characterized in that: The top side of the load-bearing cylinder (13) is provided with a load-bearing cylinder flange that is adapted to the outer ring of the bearing, so that the load-bearing cylinder (13) and the outer ring of the bearing are connected and fixed as a whole through a plurality of fastening bolts that are arranged along the circumferential direction on the load-bearing cylinder flange and the outer ring of the bearing; the bottom side of the column (12) is provided with a column flange that is adapted to the inner ring of the bearing, so that the column (12) and the inner ring of the bearing are connected and fixed as a whole through a plurality of fastening bolts that are arranged along the circumferential direction on the load-bearing column flange and the inner ring of the bearing.

5. The operating ship tower crane auxiliary crane according to claim 1, characterized in that: A plurality of stabilizing brackets (19) are evenly distributed in the circumferential direction of the load-bearing cylinder (13), one end of which is fixed on the outer wall of the load-bearing cylinder (13) and the other end is fixed on a designated fixed position of the load-bearing cylinder (13).

6. The operating ship tower crane auxiliary crane according to claim 1, characterized in that: A plurality of reinforcing ribs (14) are evenly distributed in the circumferential direction of the load-bearing cylinder (13), and the reinforcing ribs (14) are respectively fixed on the outer wall of the load-bearing cylinder (13) and the top surface of the connecting bottom plate.

7. The operating ship tower crane auxiliary crane according to claim 1, characterized in that: A limit stopper (2) is vertically arranged on the top surface of the bearing inner ring of the slewing bearing (11), and its top surface is an inclined surface; the limit stopper (2) is arranged in a manner such that the lower position of the top inclined surface of the limit stopper (2) is adjacent to the column (12), and is arranged on both sides of the column (12) together with the lifting cylinder (10); the height of the limit stopper (2) is adapted to the height of the column (12), and the inclination angle of the top inclined surface is adapted to the maximum setting angle of the main arm (5) when the main arm (5) is turned upward to the maximum setting angle, so that when the main arm (5) is turned upward to the maximum setting angle, the vertical short arm of the main arm (5) is against the top surface of the limit stopper (2).

8. The operating ship tower crane auxiliary crane according to claim 1, characterized in that: The load-bearing cylinder (13) is fixed to one side of the load-bearing vehicle (16). A counterweight box (17) is fixed to the other side of the load-bearing vehicle (16) opposite to the extension direction of the main arm (5). A plurality of counterweight blocks are arranged in the counterweight box. A battery (18) and a controller (20) are arranged on the counterweight box (17). The controller (20) is respectively connected to the drive motor (1), the hoist (4), the telescopic cylinder (6) and the lifting cylinder (10) to respectively control the working states of the drive motor, the hoist, the telescopic cylinder (6) and the lifting cylinder (10). The battery (18) is connected to each electrical device to supply power.

9. The operating ship tower crane auxiliary crane according to claim 8, characterized in that: The load-bearing vehicle (16) comprises a horizontally arranged load-bearing base plate, and universal wheels (15) with brake mechanisms are respectively installed at the four corners of the bottom surface; an inverted U-shaped load-bearing vehicle push frame is vertically fixed on the load-bearing base plate on one side of which the counterweight box (17) is arranged.

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