Shipboard crane for offshore operations

Abstract

The utility model discloses a ship -borne crane for offshore operation, including support, hoisting assembly and fixture subassembly, hoisting assembly includes power input part, transmission mechanism and lifting appliance, power input part drives lifting appliance to go up and down movement through transmission mechanism, fixture subassembly is connected in lifting appliance, and fixture subassembly includes support frame, at least two opposite setting's clamping arm and drive mechanism, clamping arm is installed in support frame in open and close, and the inside working surface of clamping arm is arc or pincer shape, and the clamping groove is formed between two opposite setting's clamping arms, drive mechanism is used for driving two clamping arms open and close to snatch or loosen cylindrical heavy object, the utility model discloses through setting up the clamping arm with arc or pincer shape working surface, specially aiming at the appearance feature design of cylindrical heavy object, has provided greater contact area and better stress distribution, has improved snatch stability and security significantly. Overall simple and reliable structure, the low manufacturing cost, maintains conveniently.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, and in particular to a shipborne crane for offshore operations. Background Technology

[0002] In offshore construction, it is often necessary to hoist and move large cylindrical heavy objects, such as steel pipe piles and offshore wind power foundation structures. Traditional shipborne cranes mostly use hooks or ordinary clamps, which have problems such as unstable gripping, easy slippage, and poor centering. Especially when operating in wave environments, safety and efficiency are low. Existing clamps have simple structures and lack adaptive gripping and limiting functions for cylindrical objects, making it difficult to meet the needs of complex offshore working conditions. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a marine crane for offshore operations, comprising a support frame, a lifting assembly, and a clamping assembly. The lifting assembly includes a power input component, a transmission mechanism, and a lifting device. The power input component drives the lifting device to perform lifting and lowering movements via the transmission mechanism. The clamping assembly is connected to the lifting device and includes a support frame, at least two opposing clamping arms, and a drive mechanism. The clamping arms are closable and mounted on the support frame, and the inner working surface of each clamping arm is arc-shaped or clamp-shaped, with a clamping groove formed between the two opposing clamping arms. The drive mechanism is used to drive the two clamping arms to open and close, thereby gripping or releasing cylindrical heavy objects.

[0004] Preferably, it further includes a first limiting arm and a second limiting arm, the first limiting arm and the second limiting arm being fixedly connected to the support frame, the first limiting arm having a first limiting groove, the second limiting arm having a second limiting groove, and the axis of the first limiting groove, the axis of the second limiting groove and the axis of the clamping groove coinciding.

[0005] Preferably, the clamping assembly further includes a movable column, a first connecting rod, and a second connecting rod. The clamping arms include a first clamping arm and a second clamping arm, which are disposed opposite to each other. The support frame has a first movable slot, a second movable slot, and a third movable slot. The first clamping arm passes through the first movable slot, the second clamping arm passes through the second movable slot, and the movable column passes through the third movable slot. The first connecting rod rotatably connects the movable column and the first clamping arm, and the second connecting rod rotatably connects the movable column and the second clamping arm. The driving mechanism is used to drive the movable column to move within the third movable slot, thereby driving the first clamping arm and the second clamping arm to open and close.

[0006] Preferably, the driving mechanism includes a rotating arm and a pull rod. The rotating arm is rotatably connected to the support frame. One end of the rotating arm is provided with a receiving groove for accommodating the movable column, and the other end of the rotating arm is fixedly connected to the pull rod.

[0007] Preferably, it further includes a fixing frame and an electromagnet, the pull rod is made of magnetic material, the fixing frame is fixedly connected to the support frame, the electromagnet is mounted on the fixing frame and faces the pull rod, or it may further include a cylinder, the cylinder is mounted on the support frame and the output end of the cylinder is connected to the pull rod.

[0008] Preferably, the transmission mechanism includes a pulley block and a sling, the pulley block is rotatably connected to the bracket, the sling is slidably connected to the pulley block, one end of the sling is connected to the power input component, and the other end of the sling is connected to the clamp assembly.

[0009] Preferably, the power input component includes a drum, a drive pulley, a belt, a driven pulley, and a rocker arm. The drive pulley and the driven pulley are both rotatably connected to the bracket. The rocker arm is fixedly connected to the drive pulley, the driven pulley is fixedly connected to the drum, and the belt drive connects the drive pulley and the driven pulley.

[0010] Preferably, the bracket also includes a plurality of casters, which are located at the bottom of the bracket.

[0011] Preferably, the bracket includes a crossbar, a first side bracket, and a second side bracket, with the first side bracket and the second side bracket arranged opposite to each other. One end of the crossbar is fixedly connected to the first side bracket, and the other end of the crossbar is fixedly connected to the second side bracket.

[0012] Preferably, it further includes a connecting rod, the first side bracket is provided with a first buckle, the second side bracket is provided with a second buckle, one end of the connecting rod is connected to the first buckle, and the other end of the connecting rod is connected to the second buckle.

[0013] The beneficial effects of this utility model are as follows: In this invention, the bracket provides overall support, and the lifting assembly provides power through a power input component, which is transmitted to the lifting device via a transmission mechanism to achieve lifting movement. The clamping assembly is connected below the lifting device. When a cylindrical heavy object needs to be gripped, the drive mechanism pushes the two clamping arms to close, and the arc-shaped working surface fits against the surface of the heavy object, forming a stable grip. By setting clamping arms with arc-shaped or pincer-shaped working surfaces, specifically designed for the shape characteristics of cylindrical heavy objects, a larger contact area and better force distribution are provided, significantly improving gripping stability and safety. The overall structure is simple and reliable, with low manufacturing cost and convenient maintenance. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a structural schematic diagram of a shipborne crane for offshore operations provided in an embodiment of this utility model.

[0015] Figure 2 This is one of the structural schematic diagrams of the clamp assembly provided in the embodiments of this utility model.

[0016] Figure 3 This is the second structural schematic diagram of the clamp assembly provided in this embodiment of the utility model.

[0017] Figure 4 This is a partial structural schematic diagram of the clamp assembly provided in this embodiment of the utility model. In the diagram: 100. Cylindrical weight; 1. Support frame; 2. Lifting assembly; 3. Clamping assembly; 4. First limiting arm; 5. Second limiting arm; 6. Caster wheel; 11. Crossbar; 12. First side support; 13. Second side support; 14. Connecting rod; 21. Power input component; 22. Transmission mechanism; 23. Lifting device; 31. Support frame; 32. Clamping arm; 33. Drive mechanism; 34. Moving column; 35. First connecting rod; 36. Second connecting rod; 37. Clamping groove; 41, First limiting groove; 51, Second limiting groove; 121, First buckle; 141, Second buckle; 211, Drum; 212, Rocker arm; 221, Pulley block; 222, Sling; 311, First moving groove; 312, Second moving groove; 313, Third moving groove; 321, First clamping arm; 322, Second clamping arm; 331, Rotating arm; 332, Pull rod; 333, Fixing frame; 334, Electromagnet; 3311, Receiving groove. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other. For ease of description, the words "upper," "lower," "left," and "right" appearing below only indicate that they are consistent with the upper, lower, left, and right directions of the drawings themselves, and do not limit the structure.

[0019] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this utility model proposes a shipborne crane for offshore operations, including a support frame 1, a lifting assembly 2, and a clamping assembly 3. The lifting assembly 2 includes a power input component 21, a transmission mechanism 22, and a lifting device 23. The power input component 21 drives the lifting device 23 to perform lifting and lowering movements through the transmission mechanism 22. The clamping assembly 3 is connected to the lifting device 23 and includes a support frame 31, at least two opposing clamping arms 32, and a drive mechanism 33. The clamping arms 32 are closably mounted on the support frame 31, and the inner working surface of the clamping arms 32 is arc-shaped or clamp-shaped. A clamping groove 37 is formed between the two opposing clamping arms 32. The drive mechanism 33 is used to drive the two clamping arms 32 to open and close, so as to grab or release a cylindrical heavy object 100. Specifically, the support frame 1 provides overall support, and the lifting assembly 2 provides power through the power input component 21, which is transmitted to the lifting device 23 through the transmission mechanism 22 to realize the lifting and lowering movements. The clamp assembly 3 is connected below the lifting device 23. When a cylindrical heavy object 100 needs to be gripped, the drive mechanism 33 pushes the two clamping arms 32 to close, and the arc-shaped working surface fits against the surface of the heavy object to form a stable grip. By setting clamping arms with arc-shaped or pincer-shaped working surfaces, specifically designed for the shape characteristics of cylindrical heavy objects, a larger contact area and better force distribution are provided, significantly improving gripping stability and safety.

[0020] In one embodiment, the system further includes a first limiting arm 4 and a second limiting arm 5, which are fixedly connected to the support frame 31. The first limiting arm 4 has a first limiting groove 41, and the second limiting arm 5 has a second limiting groove 51. The axes of the first limiting groove 41, the second limiting groove 51, and the clamping groove 34 coincide. Specifically, the first limiting arm 4 and the second limiting arm 5 are fixedly installed on the support frame 31. When the cylindrical weight 100 is clamped, its two ends are respectively embedded in the first limiting groove 41 and the second limiting groove 51, forming a three-point positioning, which effectively restricts the movement of the weight in all directions. The limiting grooves on the first limiting arm 4 and the second limiting arm 5 coincide with the axis of the clamping groove 37, ensuring that the weight remains centered during hoisting and preventing accidents caused by swaying, which is particularly suitable for marine wave environments.

[0021] In one embodiment, the clamp assembly 3 further includes a movable column 34, a first connecting rod 35, and a second connecting rod 36. The clamping arm 32 includes a first clamping arm 321 and a second clamping arm 322, which are disposed opposite to each other. The support frame 31 has a first movable groove 311, a second movable groove 312, and a third movable groove 313. The first clamping arm 321 passes through the first movable groove 311, the second clamping arm 322 passes through the second movable groove 312, and the movable column 34 passes through the third movable groove 313. The first connecting rod 35 rotatably connects the movable column 34 and the first clamping arm 321, and the second connecting rod 36 rotatably connects the movable column 34 and the second clamping arm 322. The driving mechanism 33 is used to drive the movable column 34 to move within the third movable groove 313, so as to drive the first clamping arm 321 and the second clamping arm 322 to open and close. Specifically, the drive mechanism 33 pushes the movable column 34 to move within the third movable groove 313. Through the first connecting rod 35 and the second connecting rod 36, the first clamping arm 321 and the second clamping arm 322 move synchronously along the first movable groove 311 and the second movable groove 312, respectively, thus realizing the opening and closing action of the clamping arms. The linkage operation of the clamping arms is achieved through the movable column 34 and the linkage mechanism. The structure is simple and reliable, with high transmission efficiency, and can provide sufficient clamping force to ensure a firm grip on heavy objects even in harsh sea conditions.

[0022] In one embodiment, the drive mechanism 33 includes a rotating arm 331 and a pull rod 332. The rotating arm 331 is rotatably connected to the support frame 31. One end of the rotating arm 331 is provided with a receiving groove 3311 for accommodating the movable column 34, and the other end of the rotating arm 331 is fixedly connected to the pull rod 332. Specifically, when the pull rod 332 is pulled, the rotating arm 331 rotates around its fulcrum, the movable column 34 enters the receiving groove 3311, the rotating arm 331 moves, thereby driving the movable column 34 to move linearly in the third moving groove 313, and thus controlling the opening and closing of the clamping arm through the linkage mechanism.

[0023] In one embodiment, the system further includes a fixing frame 333 and an electromagnet 334. The pull rod 332 is made of magnetic material. The fixing frame 333 is fixedly connected to the support frame 31. The electromagnet 334 is mounted on the fixing frame 333 and faces the pull rod 332. Specifically, in this embodiment, the pull rod 332 can be manually driven to move and clamp the cylindrical weight. Then, the electromagnet 334 is activated to attract the pull rod 332, thereby locking the pull rod 332. In another embodiment, the system further includes a cylinder mounted on the support frame 31, with its output end connected to the pull rod 332. Specifically, the output end of the cylinder is directly connected to the pull rod 332, and the push or pull is controlled by air pressure.

[0024] In one embodiment, the transmission mechanism 22 includes a pulley block 221 and a sling 222. The pulley block 221 is rotatably connected to the support 1, and the sling 222 is slidably connected to the pulley block 221. One end of the sling 222 is connected to the power input component 21, and the other end is connected to the clamp assembly 3. Specifically, the sling 222 passes around the pulley block 221, with one end connected to the drum 211 and the other end connected to the clamp assembly 3. When the drum 211 rotates, the pulley block 221 changes direction and amplifies the stroke, achieving smooth lifting and lowering of the clamp assembly 3.

[0025] In one embodiment, the power input component 21 includes a drum 211, a drive pulley, a belt, a driven pulley, and a rocker arm 212. Both the drive pulley and the driven pulley are rotatably connected to the bracket 1. The rocker arm 212 is fixedly connected to the drive pulley, and the driven pulley is fixedly connected to the drum 211. The belt drives the drive pulley and the driven pulley. Specifically, the operator cranks the rocker arm 212, causing the drive pulley to rotate. This, in turn, drives the driven pulley and the drum 211 to rotate via the belt drive, thus enabling the sling 222 to be raised and lowered. This mechanical transmission method is simple in structure, easy to maintain, and requires no power supply, making it particularly suitable for offshore operating environments.

[0026] In one embodiment, the system also includes multiple casters 6, which are located at the bottom of the support frame 1. Specifically, the casters 6 are mounted at the bottom of the support frame 1 and can be locked or released as needed to facilitate equipment movement and positioning. The casters 6 give the crane good mobility, making it easy to adjust its position on the ship's deck to adapt to different operational needs.

[0027] In one embodiment, the support 1 includes a crossbar 11, a first side support 12, and a second side support 13. The first side support 12 and the second side support 13 are arranged opposite to each other. One end of the crossbar 11 is fixedly connected to the first side support 12, and the other end of the crossbar 11 is fixedly connected to the second side support 13. Specifically, the first side support 12 and the second side support 13 are connected as a whole by the crossbar 11, which also serves as the mounting base for the pulley block 221, forming a complete force-bearing system. The crossbar 11 connects the two side supports, forming a stable frame structure with strong load-bearing capacity and good resistance to wind and waves.

[0028] In one embodiment, a connecting rod 14 is also included. The first side bracket 12 is provided with a first buckle 121, and the second side bracket 13 is provided with a second buckle 131. One end of the connecting rod 14 is connected to the first buckle 121, and the other end of the connecting rod 14 is connected to the second buckle 141. Specifically, the connecting rod 14 is connected to the two side brackets via the first buckle 121 and the second buckle 141, forming a triangular stable structure, significantly improving the bracket's resistance to lateral loads. The connecting rod 14 further enhances the stability and integrity of the bracket, preventing excessive deformation when hoisting heavy objects.

[0029] In actual operation, the operator first moves the crane to a suitable position using the casters 6 and locks them. Then, the operator cranks the rocker arm 212 to lower the clamping assembly 3 to the appropriate height via the transmission system. The crane position is adjusted so that the cylindrical weight 100 is within the clamping slot 37. The drive mechanism 33 is operated to close the clamping arm 32 and clamp the weight. After confirming a secure clamping, the weight is lifted to the required height using the lifting assembly 2. The crane is moved to the target position, the weight is slowly lowered, and the drive mechanism 33 is operated to release the clamping arm, completing the operation. Throughout the process, the first limit arm 4 and the second limit arm 5 ensure that the weight remains stably centered, preventing swaying caused by hull movement. The drive mechanism can be operated manually or remotely depending on the actual situation to ensure operational safety.

[0030] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A shipborne crane for offshore operations, characterized in that, include: support; The lifting assembly includes a power input component, a transmission mechanism, and a lifting device; the power input component drives the lifting device to perform lifting and lowering movements through the transmission mechanism. A clamping assembly is connected to the lifting device. The clamping assembly includes a support frame, at least two opposing clamping arms, and a drive mechanism. The clamping arms are closable and mounted on the support frame. The inner working surface of the clamping arms is arc-shaped or clamp-shaped, and a clamping groove is formed between the two opposing clamping arms. The drive mechanism is used to drive the two clamping arms to open and close to grip or release cylindrical heavy objects.

2. The marine crane for offshore operations according to claim 1, characterized in that, It also includes a first limiting arm and a second limiting arm, which are fixedly connected to the support frame. The first limiting arm is provided with a first limiting groove, and the second limiting arm is provided with a second limiting groove. The axis of the first limiting groove, the axis of the second limiting groove, and the axis of the clamping groove coincide.

3. The marine crane for offshore operations according to claim 2, characterized in that, The clamping assembly further includes a movable column, a first connecting rod, and a second connecting rod. The clamping arms include a first clamping arm and a second clamping arm, which are disposed opposite to each other. The support frame has a first movable slot, a second movable slot, and a third movable slot. The first clamping arm passes through the first movable slot, the second clamping arm passes through the second movable slot, and the movable column passes through the third movable slot. The first connecting rod rotatably connects the movable column and the first clamping arm, and the second connecting rod rotatably connects the movable column and the second clamping arm. The driving mechanism is used to drive the movable column to move within the third movable slot, thereby driving the first clamping arm and the second clamping arm to open and close.

4. The marine crane for offshore operations according to claim 3, characterized in that, The driving mechanism includes a rotating arm and a pull rod. The rotating arm is rotatably connected to the support frame. One end of the rotating arm is provided with a receiving groove for accommodating the movable column, and the other end of the rotating arm is fixedly connected to the pull rod.

5. The marine crane for offshore operations according to claim 4, characterized in that, It also includes a fixing frame and an electromagnet, the pull rod is made of magnetic material, the fixing frame is fixedly connected to the support frame, the electromagnet is installed on the fixing frame and faces the pull rod, or it may also include a cylinder, the cylinder is installed on the support frame and the output end of the cylinder is connected to the pull rod.

6. The marine crane for offshore operations according to claim 1, characterized in that, The transmission mechanism includes a pulley block and a sling. The pulley block is rotatably connected to the bracket, and the sling is slidably connected to the pulley block. One end of the sling is connected to the power input component, and the other end of the sling is connected to the clamp assembly.

7. The marine crane for offshore operations according to claim 1, characterized in that, The power input component includes a drum, a drive pulley, a belt, a driven pulley, and a rocker arm. The drive pulley and the driven pulley are rotatably connected to the bracket. The rocker arm is fixedly connected to the drive pulley, and the driven pulley is fixedly connected to the drum. The belt drives the drive pulley and the driven pulley.

8. The marine crane for offshore operations according to claim 1, characterized in that, It also includes multiple casters, which are located at the bottom of the bracket.

9. The marine crane for offshore operations according to claim 1, characterized in that, The support includes a crossbar, a first side support, and a second side support. The first side support and the second side support are arranged opposite to each other. One end of the crossbar is fixedly connected to the first side support, and the other end of the crossbar is fixedly connected to the second side support.

10. The marine crane for offshore operations according to claim 9, characterized in that, It also includes a connecting rod, the first side bracket is provided with a first buckle, the second side bracket is provided with a second buckle, one end of the connecting rod is connected to the first buckle, and the other end of the connecting rod is connected to the second buckle.

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