Offshore portal crane

Abstract

The utility model provides an offshore portal crane, and relates to the technical field of cranes, and the offshore portal crane comprises a main beam, two supporting legs, an electric winch module, two main hooks and two ground beams; the top ends of the two supporting legs are fixedly connected to the two ends of the main beam respectively, the bottom ends of the two supporting legs are fixedly connected to the two ground beams respectively, the supporting legs are perpendicular to the ground beams, the ground beams are in a long strip shape, and the linear direction of the ground beams is perpendicular to the linear direction of the main beam. The electric winch module is connected to the main beam; the two main hooks are connected with the electric winch module through steel wire ropes, and the electric winch module retracts and releases the steel wire ropes to drive one of the main hooks to ascend or descend or drive the two main hooks to ascend or descend synchronously. The steel wire rope gathering phenomenon is avoided, the height deviation of the two main hooks is adjusted, and rapid and stable offshore hoisting operation is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of cranes, and in particular to an offshore gantry crane. Background Art

[0002] With the rapid development of world economic trade and the continuous development of marine resources, marine aquaculture has received more and more attention, especially sea cucumbers, abalone and other marine delicacies with high nutritional value and investment value, which are becoming more and more popular. How to quickly and efficiently retract the aquaculture cages from the seawater to the aquaculture platform has become an urgent problem that needs to be solved.

[0003] Gantry crane is a variation of bridge crane, also called gantry crane. It is mainly used for loading and unloading of outdoor cargo yards, material yard cargo, and bulk cargo. Structurally, it consists of a gantry, a trolley running mechanism, a lifting trolley, and an electrical part. Some gantry cranes have outriggers only on one side, and the other side is supported on a factory building or a trestle for operation, which is called a semi-gantry crane. The gantry crane is composed of the upper bridge frame (including the main beam and end beam), outriggers, and lower crossbeams. In order to expand the operating range of the crane, the main beam can extend beyond the outriggers to one or both sides to form a cantilever. A lifting trolley with an arm can also be used to expand the operating range of the crane by pitching and rotating the arm. Gantry cranes have the characteristics of high site utilization, large operating range, wide adaptability, and strong versatility, and are widely used in port cargo yards.

[0004] The existing patent publication number is CN220351493U, which discloses a double-hook intelligent gantry crane, including a crane beam, an electric trolley running on the crane beam, a drum provided on the electric trolley, a wire rope wound on the drum, and characterized in that a first frame and a second frame are provided below the wire rope, a pulley wound with the wire rope is installed on the first frame, a first slider slides left and right in the first frame, a first rack located below the first frame is fixed to the first slider, a first vertical support rod is fixed to the right end of the first slider, and a first hook is fixed to the lower end of the first support rod. The shortcomings of the double-hook intelligent gantry crane are that the wire rope outlet position is not fixed, and the outlet position offset is relatively large as the length of the wire rope is different, and the wire rope will be bunched when the drum is wound with the wire rope.

[0005] The gantry crane's hoisting trolley is driven by a motor to reel in and out the wire rope. The wire rope outlet position is not fixed. With the different lengths of the reeled wire rope, the outlet position offset is relatively large, and the wire rope will be bunched when the drum is wound around the wire rope. When two hoisting trolleys are used to hoist an object at the same time, the main hooks connected by the two hoisting trolleys are prone to height deviation, making it difficult to keep the object stable and unable to achieve the requirements of fast and stable hoisting operations at sea.

[0006] Therefore, the technical problem that urgently needs to be solved is: how to provide an offshore gantry crane to adjust the height deviation of the two main hooks to achieve fast and stable lifting operations at sea. Utility Model Content

[0007] The purpose of the present application is to provide an offshore gantry crane that can adjust the height deviation of two main hooks to achieve rapid and stable lifting operations at sea.

[0008] In order to achieve the above-mentioned purpose, the present application provides an offshore gantry crane, which includes: a main beam, two legs, an electric winch module, two main hooks and two ground beams; the top ends of the two legs are respectively fixedly connected to the two ends of the main beam, and the bottom ends of the two legs are respectively fixedly connected to the two ground beams; the electric winch module is connected to the main beam; the two main hooks are connected to the electric winch module through steel wire ropes, and the electric winch module retracts and releases the steel wire ropes to drive one of the main hooks to rise and fall or drives the two main hooks to rise and fall synchronously.

[0009] The offshore gantry crane as described above, wherein the offshore gantry crane also includes: two trolley traveling mechanisms, a rail clamp and two guide rails; the two ground beams are respectively slidably connected to the two guide rails; the ground beams are parallel to the guide rails; the two trolley traveling mechanisms are respectively fixedly connected to the two ground beams, and the trolley traveling mechanisms drive the ground beams to slide along the guide rails; the rail clamps are fixedly connected to both ends of the ground beams, and when the ground beams are moved into place, the rail clamps clamp the guide rails; the guide rails are connected to the offshore platform.

[0010] As described above, in the offshore gantry crane, an anchoring device is provided on the ground beam; the anchoring device anchors the ground beam at a fixed position.

[0011] The offshore gantry crane as described above, wherein the electric winch module includes: a motor, a first clutch, a second clutch, a first gear box, a second gear box, a first drum and a second drum; the two ends of the motor have an upper output end and a lower output end, the upper output end is connected to the first drum through the first clutch and the first gear box; the lower output end is connected to the second drum through the second clutch and the second gear box; the wire ropes wound on the first drum and the second drum are respectively connected to two main hooks.

[0012] The offshore gantry crane as described above, wherein the first clutch and the second clutch are both closed, one motor drives the first drum and the second drum to rotate at the same time, and the two main hooks are raised and lowered synchronously; when one of the first clutch and the second clutch is closed, the motor drives the drum connected to the closed clutch to rotate, and one of the main hooks is raised and lowered.

[0013] The offshore gantry crane as described above, wherein the steel wire rope includes a first steel wire rope and a second steel wire rope; the first steel wire rope is wound around the first drum, and one end of the first steel wire rope away from the first drum is connected to the main beam; the second steel wire rope is wound around the second drum, and one end of the second steel wire rope away from the second drum is connected to the main beam.

[0014] The offshore gantry crane as described above, wherein the rail clamp comprises: a mounting seat, a square shaft, a right-handed clamping block, a left-handed clamping block, a bidirectional threaded column and a hexagonal head column, the mounting seat is fixedly connected to the ground beam, the square shaft is fixedly connected to the mounting seat through a bracket, the right-handed clamping block and the left-handed clamping block are slidably connected to the square shaft; the bidirectional threaded column passes through the right-handed clamping block and the left-handed clamping block, and the bidirectional threaded column is threadedly connected to the right-handed clamping block and the left-handed clamping block; the bidirectional threaded column is arranged parallel to the square shaft, and the hexagonal head column is arranged at the end of the bidirectional threaded column.

[0015] The offshore gantry crane as described above, wherein the main hook comprises a first main hook and a second main hook; the first main hook and the second main hook are connected to the first steel wire rope and the second steel wire rope respectively.

[0016] In the offshore gantry crane as described above, mechanical limiting devices are provided at both ends of the guide rail, and the mechanical limiting devices are used to limit the ground beam to prevent the ground beam from detaching from the guide rail.

[0017] The offshore gantry crane as described above, wherein, further comprises: the outer circumference of the bidirectional threaded column has left-handed threads and right-handed threads; the bidirectional threaded column is threadedly connected to the right-handed clamping block via the right-handed threads; the bidirectional threaded column is threadedly connected to the left-handed clamping block via the left-handed threads.

[0018] The beneficial effects achieved by this application are as follows:

[0019] (1) The present application can use one motor to drive two reels to rotate at the same time to achieve synchronous movement of two main hooks; or a single clutch can be disengaged and a motor can be used to drive a reel to rotate alone to achieve independent movement of a single main hook, making it easier to achieve consistency in height between the two main hooks during debugging.

[0020] (2) The direction of the wire rope connected to the main hook pulley of the offshore gantry crane of the present application is vertical, which can realize the linear movement of the main hook in the vertical direction and avoid deviation.

[0021] (3) The power cord and high-pressure air pipe of the offshore gantry crane of the present application are connected to the offshore platform through a drag chain. The drag chain replaces the existing power reel and compressed air pipe reel, saving space and cost.

[0022] (4) When operating the offshore gantry crane of the present application, the two main hooks can be raised and lowered synchronously without causing displacement on the plane, thereby achieving stability in hoisting cargo, making it easier and more convenient to hoist cargo in a vertical direction, and improving the work efficiency of the hoisting operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For those skilled in the art, other drawings can also be obtained based on these drawings.

[0024] Figure 1 This is a front view of an offshore gantry crane according to an embodiment of the present application.

[0025] Figure 2 This is a top view of an offshore gantry crane according to an embodiment of the present application.

[0026] Figure 3 This is a left view of an offshore gantry crane according to an embodiment of the present application.

[0027] Figure 4 Schematic diagram of the guide rail structure of an embodiment of the present application.

[0028] Figure 5 This is a schematic diagram of the structure of the electric winch module according to an embodiment of the present application.

[0029] Figure 6 This is a schematic structural diagram of a rail clamp according to an embodiment of the present application.

[0030] Figure numerals: 1-main beam; 2-outrigger; 3-distribution box; 5-load sensor; 6-electric winch module; 7-main hook; 8-trolley travel mechanism; 9-ground beam; 12-drag chain; 13-rail clamp; 15-anchor device; 16-guide rail; 17-mechanical limit device; 18-ladder rail; 19-track pressure plate; 20-guide rail pad; 21-motor; 22-first clutch; 23-first gear Box; 24-first drum; 25-second clutch; 26-second gear box; 27-second drum; 28-wire rope connection; 29-pulley; 30-wire rope; 131-mounting seat; 132-square shaft; 133-right-hand clamping block; 134-left-hand clamping block; 135-right-hand thread; 136-left-hand thread; 137-hexagonal head column; 138-rail clamping mouth; 139-bidirectional thread column. DETAILED DESCRIPTION

[0031] The following is a clear and complete description of the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0032] like Figure 1-4 As shown, the present application provides an offshore gantry crane, which includes: a main beam 1, two legs 2, an electric winch module 6, two main hooks 7 and two ground beams 9; the main beam 1 is fixedly connected to the top ends of the two legs 2, the top ends of the two legs 2 are respectively fixedly connected to the two ends of the main beam 1, and the bottom ends of the two legs 2 are respectively fixedly connected to the two ground beams 9, the legs 2 are perpendicular to the ground beams 9, the ground beams 9 are long strips, and the straight line direction of the ground beams 9 is perpendicular to the straight line direction of the main beams 1; the electric winch module 6 is connected to the main beam 1; the two main hooks 7 are connected to the electric winch module 6 through the wire rope 30, that is, the electric winch module 6 is connected to the main hook 7 through the wire rope 30, the main hook 7 is used for lifting cargo, and the electric winch module 6 is used for retracting and releasing the wire rope 30, and the electric winch module 6 retracting and releasing the wire rope 30 can drive one of the main hooks 7 to rise and fall or drive the two main hooks 7 to rise and fall synchronously. When one of the main hooks 7 is raised or lowered, the height of one main hook 7 can be adjusted independently, and the height of the other main hook 7 remains unchanged, so that the heights of the two main hooks 7 are consistent. When the heights of the two main hooks 7 are consistent, the electric winch module 6 retracts and releases the wire rope 30 to drive the two main hooks 7 to rise and fall synchronously, thereby achieving smooth lifting of the goods and improving the efficiency of the lifting operation.

[0033] As a specific embodiment of the utility model, the offshore gantry crane is installed on the main deck of the offshore platform. Two ground beams 9 are connected to the main deck of the offshore platform, so that the offshore gantry crane is installed on the offshore platform to realize the hoisting operation of the offshore platform. The maximum limit of the lifting capacity of each main hook 7 is 5 tons, but not limited to 5 tons. The maximum limit of the lifting capacity of each main hook 7 of the utility model is preferably 5 tons.

[0034] As a preferred embodiment of the utility model, the offshore gantry crane has a certain height, and the length of the wire rope 30 of the offshore gantry crane can meet the cargo lifting requirements of the two main hooks 7 within the range of 0-4.5m above the main deck of the offshore platform and within the range of 0-21m below the main deck of the offshore platform. However, the two main hooks 7 are not limited to the cargo lifting within the range of 0-4.5m above the main deck of the offshore platform and within the range of 0-21m below the main deck of the offshore platform, but can also be other ranges.

[0035] like Figure 1-4As shown, the offshore gantry crane also includes: two trolley walking mechanisms 8, a rail clamp 13 and two guide rails 16; two ground beams 9 are slidably connected to the two guide rails 16 respectively; the two guide rails 16 are arranged in parallel and spaced apart, and the ground beam 9 is parallel to the guide rails 16; the two trolley walking mechanisms 8 are fixedly connected to the two ground beams 9 respectively, and the trolley walking mechanism 8 is fixedly connected to the side of the ground beam 9; when the trolley walking mechanism 8 walks along the surface of the offshore platform, the trolley walking mechanism 8 drives the ground beam 9 to slide along the guide rails 16; the rail clamp 13 is fixedly connected to both ends of the ground beam 9, and each end of each ground beam 9 is fixedly connected to a rail clamp 13, and after the ground beam 9 moves into place, the rail clamps 13 arranged at both ends of the ground beam 9 clamp the guide rails 16 to limit the position between the ground beam 9 and the guide rails 16, and prevent the ground beam 9 from sliding relative to the guide rails 16; the guide rails 16 are connected to the offshore platform, so as to realize the overall fixed connection of the offshore gantry crane to the offshore platform.

[0036] It should be explained that the rail clamp 13 locks the offshore gantry crane on the guide rail 16 to prevent the offshore gantry crane from sliding when subjected to unexpected thrust.

[0037] As a specific embodiment of the utility model, the trolley travel mechanism 8 includes a motor, a frame and wheels, the motor and the wheels are installed on the frame, the motor is connected to the wheels by transmission, the frame is fixedly connected to the ground beam 9, the wheels are in contact with the main deck of the offshore platform, the motor starts to drive the wheels to rotate, after the wheels rotate, the ground beam 9 and the overall offshore gantry crane are driven to move along the guide rail 16, the motor stops rotating, the wheels stop rotating accordingly, the overall offshore gantry crane stops moving, the guide rail 16 is clamped by the rail clamp 13, the ground beam 9 is fixedly connected to the guide rail 16, so that the overall offshore gantry crane will not move under the action of external force, and the stability and reliability of the overall offshore gantry crane connected to the offshore platform are improved. The trolley travel mechanism 8 can adopt the existing trolley travel mechanism, which will not be repeated here.

[0038] like Figure 4As shown, the guide rail 16 is fixedly connected to the guide rail pad 20 by a track pressure plate 19 and studs, the track pressure plate 19 is fixedly connected to the guide rail pad 20 by studs, the track pressure plates 19 are arranged on both sides of the bottom end of the guide rail 16, and the track pressure plates 19 press the two sides of the bottom end of the guide rail 16, and the guide rail pad 20 is fixedly connected to the main deck of the offshore platform. Preferably, the guide rail pad 20 is welded and fixed to the main deck of the offshore platform, so that the guide rail 16 is fixedly connected to the main deck of the offshore platform. By adjusting the position of the studs on site, the two guide rails 16 are ensured to be parallel, so as to ensure the center distance between the two guide rails 16, and avoid the jamming of the offshore gantry crane due to the construction and closing error of the offshore platform. Preferably, the center distance between the two guide rails 16 is 9.3m. The center distance between the two guide rails 16 is not limited here, and it can also be the center distance in other ranges. The center distance between the two guide rails 16 is selected according to actual needs.

[0039] like Figure 3 As shown, an anchoring device 15 is provided on the ground beam 9; the anchoring device 15 can anchor the ground beam 9 at a fixed position, for example, anchor the ground beam 9 at a certain designated position of the offshore platform. The anchoring device 15 can manually anchor the offshore gantry crane at a fixed position to meet the environmental conditions of the offshore platform. The anchoring device 15 adopts an existing bolt-type, anchor chain-type or top rod-type anchoring structure, as long as it can realize anchoring the ground beam 9 at a fixed position, and the specific structure of the anchoring device 15 is not limited here.

[0040] like Figure 5 As shown, the electric winch module 6 includes: a motor 21, a first clutch 22, a second clutch 25, a first gear box 23, a second gear box 26, a first drum 24 and a second drum 27; the two ends of the motor 21 have an upper output end and a lower output end, the upper output end is connected to the first drum 24 through the first clutch 22 and the first gear box 23; the lower output end is connected to the second drum 27 through the second clutch 25 and the second gear box 26; the wire rope 30 wound on the first drum 24 and the second drum 27 are respectively connected to the two main hooks 7.

[0041] As an explanation, the first clutch 22 and the second clutch 25 are both closed, and a motor 21 drives the first drum 24 and the second drum 27 to rotate at the same time, and the two main hooks 7 are raised and lowered synchronously, that is, a motor 21 can drive the two drums at the same time, thereby realizing the synchronous lifting and lowering operation of the two main hooks 7. One of the first clutch 22 and the second clutch 25 is closed, and the motor 21 drives the drum connected to the closed clutch to rotate, and one of the main hooks 7 is raised and lowered, that is, the first clutch 22 and the second clutch 25 can be closed separately to realize the lifting and lowering operation of a single main hook 7, thereby realizing the height adjustment of a single main hook 7, so as to adjust the height of the two main hooks 7 to be consistent, so that when the two main hooks 7 are hoisting the same object, the stability of the object is guaranteed, and a fast and stable hoisting operation at sea is realized.

[0042] As a specific embodiment of the utility model, the electric winch module 6 connects the two main hooks 7 through two steel wire ropes 30. Specifically, the steel wire rope 30 includes a first steel wire rope and a second steel wire rope; the first steel wire rope is wound on the first drum 24, and the end of the first steel wire rope away from the first drum 24 is connected to the steel wire rope connecting part 28 of the main beam 1; the second steel wire rope is wound on the second drum 27, and the end of the second steel wire rope away from the second drum 27 is connected to the steel wire rope connecting part 28 of the main beam 1. The electric winch module 6 retracts and releases the end of the steel wire rope 30 away from the steel wire rope connecting part 28, thereby adjusting the height of the main hook 7.

[0043] As a specific embodiment of the utility model, the main hook 7 includes a first main hook and a second main hook; the first main hook and the second main hook are respectively connected to the first wire rope and the second wire rope through a pulley 29. The directions of the first wire rope and the second wire rope are perpendicular to the offshore platform. Therefore, the retraction and release of the first wire rope or the second wire rope can drive the first main hook or the second main hook to move linearly in a direction perpendicular to the offshore platform to avoid deviation, thereby realizing the synchronous movement of the two main hooks 7 in a direction perpendicular to the offshore platform, ensuring the stability and reliability of the offshore lifting operation.

[0044] As a specific embodiment of the utility model, the first steel wire rope is wound in a single layer on the first drum 24, and the second steel wire rope is wound in a single layer on the second drum 27, so that the lengths of the first steel wire rope and the second steel wire rope are kept consistent, so that the two main hooks 7 move synchronously in a direction perpendicular to the offshore platform, ensuring the stability and reliability of the offshore lifting operation.

[0045] like Figure 1As shown, a load sensor 5 is installed on both the first steel wire rope and the second steel wire rope. The function of the load sensor 5 is to measure and monitor the weight or load of an object. The load changes are detected in real time, and these data are transmitted to the control system, so as to achieve accurate control and monitoring of the load. The load sensor 5 adopts an existing sensor, which can be a strain gauge load sensor 5 or a pressure sensor. The type of the load sensor 5 is not limited here, as long as load monitoring can be achieved. As an example, the model of the load sensor 5 is, for example: HM8-C3-5.0T-6.5B7-A and U2AD1 / 5t.

[0046] like Figure 6 As shown, the rail clamp 13 includes: a mounting seat 131, a square shaft 132, a right-handed clamping block 133, a left-handed clamping block 134, a bidirectional threaded column 139 and a hexagonal head column 137, the mounting seat 131 is fixedly connected to the ground beam 9, the square shaft 132 is fixedly connected to the mounting seat 131 through a bracket, the right-handed clamping block 133 and the left-handed clamping block 134 are slidably connected to the square shaft 132; the bidirectional threaded column 139 passes through the right-handed clamping block 133 and the left-handed clamping block 134, and the bidirectional threaded column 139 and the right-handed clamping block 133 is threadedly connected with the left-handed clamping block 134; the bidirectional threaded column 139 is arranged parallel to the square shaft 132; the outer periphery of the bidirectional threaded column 139 has a left-handed thread 136 and a right-handed thread 135; the bidirectional threaded column 139 is threadedly connected with the right-handed clamping block 133 through the right-handed thread 135; the bidirectional threaded column 139 is threadedly connected with the left-handed clamping block 134 through the left-handed thread 136; the hexagonal head column 137 is arranged at the end of the bidirectional threaded column 139, and the axis of the hexagonal head column 137 coincides with the axis of the bidirectional threaded column 139. By screwing the hexagonal head column 137 with a wrench, the bidirectional threaded column 139 rotates, and the bidirectional threaded column 139 drives the right-handed clamping block 133 and the left-handed clamping block 134 to move toward or in the opposite direction, so as to realize the opening and closing of the rail clamping opening 138. When the rail clamping opening 138 is closed, the offshore gantry crane is locked on the guide rail 16.

[0047] like Figure 1-3 As shown, the offshore gantry crane also includes: a distribution box 3, a drag chain 12, four mechanical limit devices 17 and a ladder railing 18.

[0048] As an explanation, the distribution box 3 is an existing distribution box 3, and the distribution box 3 is used to distribute power to the electrical equipment on the offshore gantry crane to meet the different power requirements of the electrical equipment.

[0049] As an explanation, the mechanical limiting device 17 is fixedly connected to the end of the guide rail 16, and two mechanical limiting devices 17 are respectively provided at both ends of each guide rail 16. The mechanical limiting device 17 is used to limit the ground beam 9 to prevent the ground beam 9 from being separated from the guide rail 16. As an example, the mechanical limiting device 17 can be a baffle or a block.

[0050] As an explanation, the drag chain 12 is arranged with cables and compressed air pipes, and the cables and compressed air pipes arranged in the drag chain 12 are connected with the cables and compressed air pipes on the offshore platform. One end of the drag chain 12 is connected to the offshore gantry crane, and the other end is connected to the deck of the offshore platform. The drag chain 12 can adopt the drag chain in the prior art, which will not be described in detail here.

[0051] like Figure 1 As shown, the drag chain 12 is connected to the supporting leg 2, and the power line or the compressed air pipe is connected through the drag chain 12 to avoid the power line or the compressed air pipe being distributed in a disorderly manner or being entangled.

[0052] like Figure 1 As shown, the ladder railing 18 is fixedly connected to the support leg 2, and the ladder railing 18 extends from the bottom to the top of the support leg 2. The ladder railing 18 is used for operators to climb onto the main beam 1 to repair or inspect the equipment or devices installed on the main beam 1.

[0053] The beneficial effects achieved by this application are as follows:

[0054] (1) The present application can use one motor to drive two reels to rotate at the same time to achieve synchronous movement of two main hooks; or a single clutch can be disengaged and a motor can be used to drive a reel to rotate alone to achieve independent movement of a single main hook, making it easier to achieve consistency in height between the two main hooks during debugging.

[0055] (2) The direction of the wire rope connected to the main hook pulley of the offshore gantry crane of the present application is vertical, which can realize the linear movement of the main hook in the vertical direction and avoid deviation.

[0056] (3) The power cord and high-pressure air pipe of the offshore gantry crane of the present application are connected to the offshore platform through a drag chain. The drag chain replaces the existing power reel and compressed air pipe reel, saving space and cost.

[0057] (4) When operating the offshore gantry crane of the present application, the two main hooks can be raised and lowered synchronously without causing displacement on the plane, thereby achieving stability in hoisting cargo, making it easier and more convenient to hoist cargo in a vertical direction, and improving the work efficiency of the hoisting operation.

[0058] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0059] In the description of the present application, the word "for example" is used to mean "used as an example, illustration or explanation". Any embodiment described as "for example" in the present application is not necessarily to be construed as being more preferred or advantageous than other embodiments. In order to enable any technician in the field to implement and use the utility model, the following description is given. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the utility model can be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid unnecessary details that make the description of the utility model obscure. Therefore, the utility model is not intended to be limited to the embodiments shown, but is consistent with the widest range of principles and features disclosed in the present application.

[0060] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. An offshore gantry crane, characterized in that: The offshore gantry crane comprises: a main beam, two outriggers, an electric winch module, two main hooks and two ground beams; The top ends of the two legs are respectively fixedly connected to the two ends of the main beam, and the bottom ends of the two legs are respectively fixedly connected to the two ground beams; The electric winch module is connected to the main beam; The two main hooks are connected to the electric winch module via a steel wire rope, and the electric winch module retracts and releases the steel wire rope to drive one of the main hooks to rise and fall or drives the two main hooks to rise and fall synchronously.

2. The offshore gantry crane according to claim 1, characterized in that: The offshore gantry crane also includes: two trolley traveling mechanisms, a rail clamp and two guide rails; The two ground beams are respectively slidably connected to the two guide rails; the ground beams are parallel to the guide rails; The two trolley walking mechanisms are respectively fixedly connected to the two ground beams, and the trolley walking mechanisms drive the ground beams to slide along the guide rails; The rail clamps are fixedly connected to the two ends of the ground beam. When the ground beam is moved into position, the rail clamps the guide rails. The guide rails are connected to the offshore platform.

3. The offshore gantry crane according to claim 1, characterized in that: An anchoring device is provided on the ground beam; The anchoring device anchors the ground beam in a fixed position.

4. The offshore gantry crane according to claim 1, characterized in that: The electric winch module includes: a motor, a first clutch, a second clutch, a first gear box, a second gear box, a first drum and a second drum; The motor has an upper output end and a lower output end at both ends. The upper output end is connected to the first reel through the first clutch and the first gear box; The lower output end is connected to the second reel through the second clutch and the second gear box; The steel wire ropes wound on the first drum and the second drum are respectively connected to two main hooks.

5. The offshore gantry crane according to claim 4, characterized in that: The first clutch and the second clutch are both closed, and one motor drives the first drum and the second drum to rotate at the same time, and the two main hooks rise and fall synchronously; When one of the first clutch and the second clutch is closed, the motor drives the corresponding reel connected to the closed clutch to rotate, and one of the main hooks rises and falls.

6. The offshore gantry crane according to claim 4 or 5, characterized in that: The steel wire rope comprises a first steel wire rope and a second steel wire rope; The first steel wire rope is wound on the first drum, and one end of the first steel wire rope away from the first drum is connected to the main beam; The second steel wire rope is wound on the second drum, and one end of the second steel wire rope away from the second drum is connected to the main beam.

7. The offshore gantry crane according to claim 2, characterized in that: The rail clamp comprises: a mounting seat, a square shaft, a right-handed clamping block, a left-handed clamping block, a bidirectional threaded column and a hexagonal head column, the mounting seat is fixedly connected to the ground beam, the square shaft is fixedly connected to the mounting seat through a bracket, the right-handed clamping block and the left-handed clamping block are slidably connected to the square shaft; the bidirectional threaded column passes through the right-handed clamping block and the left-handed clamping block, and the bidirectional threaded column is threadedly connected to the right-handed clamping block and the left-handed clamping block; the bidirectional threaded column is arranged parallel to the square shaft, and the hexagonal head column is arranged at the end of the bidirectional threaded column.

8. The offshore gantry crane according to claim 6, characterized in that: The main hook comprises a first main hook and a second main hook; The first main hook and the second main hook are connected to the first steel wire rope and the second steel wire rope respectively.

9. The offshore gantry crane according to claim 2, characterized in that: Mechanical limiting devices are provided at both ends of the guide rail, and the mechanical limiting devices are used to limit the ground beam to prevent the ground beam from separating from the guide rail.

10. The offshore gantry crane according to claim 7, characterized in that: The outer circumference of the bidirectional threaded column has left-handed threads and right-handed threads; the bidirectional threaded column is threadedly connected to the right-handed clamping block through the right-handed threads; the bidirectional threaded column is threadedly connected to the left-handed clamping block through the left-handed threads.

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