A hoisting structure and a crane

Abstract

The application discloses a hoisting structure and a crane, wherein the hoisting structure comprises a boom, a rotating shaft and a chain. The boom comprises a hoisting end and a fixed end, the rotating shaft is arranged at the hoisting end of the boom, and the rotating shaft is provided with a first gear on the periphery. The chain comprises a first chain, an engaging chain and a second chain in sequence along the extension direction of the chain. The engaging chain is engaged with the first gear on the rotating shaft, the first chain is located on one side of the rotating shaft, the second chain is located on the other side of the rotating shaft, and the first chain and the second chain move in opposite directions along with the rotation of the rotating shaft. The application solves the problem that in the prior art, when the crane hoists a section of steel wire rope, the crane needs to be operated twice, and before the hook is lowered each time, the steel wire rope hoisted to the shaft mouth needs to be fixed first, and the operation is relatively complicated. Meanwhile, the moving amount of the boom of the application is small, it is unnecessary to shift a large amount of shielding objects, and the operation is relatively convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid gas carrier hoisting, in particular to a hoisting structure and a crane. BACKGROUND

[0002] Currently, the main way of hoisting the emergency pump of a liquid gas carrier is to use a portable crane. During the hoisting process of the emergency pump placed in the hoist well, first, the hook of the crane is lowered and hooked to the steel wire rope connected to the emergency pump. The steel wire rope is generally composed of multiple sections of steel wire rope of fixed length, and the steel wire rope directly connected to the hook is the first section of steel wire rope. In order to avoid the inconvenience caused by the excessive height of the lifting boom of the crane, after the first section of steel wire rope emerges from the hoist well, the second section of steel wire rope connected to the first section of steel wire rope and just emerging from the hoist well needs to be fixed. The first section of steel wire rope hooked to the hook is loosened, and then the crane is operated again to lower the hook and hook it to the second section of steel wire rope, and the emergency pump is hoisted again. The subsequent hoisting is repeated in turn until the emergency pump is hoisted to the hoist well, and the hoisting is completed. However, such a hoisting method requires operating the crane twice when hoisting a section of steel wire rope. Before each time the hook is lowered, the steel wire rope hoisted to the hoist well needs to be fixed first, which is relatively cumbersome. In addition, the upward and downward movement of the crane also needs to ensure that there is no obstruction in the movement space, which brings many inconveniences to the operation. SUMMARY

[0003] In view of the above shortcomings of the prior art, the purpose of the present application is to provide a hoisting structure and a crane to simplify the hoisting process and improve the hoisting efficiency.

[0004] To achieve the above-mentioned purpose and other related purposes, the present application provides a hoisting structure, comprising:

[0005] a lifting boom, comprising a hoisting end and a fixed end;

[0006] a rotating shaft, fixedly arranged at the hoisting end of the lifting boom, and provided with a first gear on the periphery thereof;

[0007] a chain, comprising a first chain, an engaging chain and a second chain in sequence along the extension direction of the chain; wherein the engaging chain is engaged with the first gear on the rotating shaft, the first chain is located on one side of the rotating shaft, and the second chain is located on the other side of the rotating shaft, and the first chain and the second chain move in opposite directions with the rotation of the rotating shaft.

[0008] Optionally, the chain comprises:

[0009] a plurality of protruding structures, arranged at intervals along the extension direction of the chain, and capable of being engaged with the teeth on the first gear.

[0010] Optionally, the first chain and the second chain are engaged through the protruding structures.

[0011] Optionally, the chain comprises:

[0012] a first hook, arranged at one end of the chain close to the first chain;

[0013] a second hook, arranged at the other end of the chain close to the second chain.

[0014] Optionally, the rotating shaft further comprises:

[0015] a second gear, arranged at the periphery of the rotating shaft and spaced apart from the first gear.

[0016] Optionally, the rotating shaft further comprises:

[0017] a rotating shaft shell, arranged at the periphery of the first gear of the rotating shaft, and an opening is further arranged on the rotating shaft shell, and the first chain and the second chain extend out of the rotating shaft shell through the opening.

[0018] Optionally, the rotating shaft shell is in a cylindrical shape, the diameter of the rotating shaft shell is greater than the diameter of the first gear, and the difference between the diameter of the rotating shaft shell and the diameter of the first gear is 1cm-5cm.

[0019] The present application also provides a crane, comprising the hoisting structure of any one of the above-mentioned schemes and a crane body, and the fixed end of the boom of the hoisting structure is connected with the crane body.

[0020] Optionally, the crane further comprises:

[0021] a driving device, arranged on the crane body and drivingly connected with the rotating shaft.

[0022] Optionally, the driving device is a driving motor or a rotating handle.

[0023] Compared with the prior art, the hoisting structure and the crane of the present application have at least the following beneficial effects:

[0024] The lifting structure comprises a lifting rod, a rotating shaft and a chain. The lifting rod comprises a lifting end and a fixed end, and the rotating shaft is arranged at the lifting end of the lifting rod and is provided with a first gear on the periphery. The chain comprises a first chain, an engaging chain and a second chain in sequence along the extension direction of the chain. The engaging chain is engaged with the first gear on the rotating shaft, the first chain is located on one side of the rotating shaft, the second chain is located on the other side of the rotating shaft, and the first chain and the second chain move in opposite directions along with the rotation of the rotating shaft. The rotating shaft is arranged at the lifting end of the lifting rod, and the chain is engaged with the first gear on the rotating shaft. The first chain and the second chain located on both sides of the rotating shaft are driven to move in opposite directions by controlling the rotation of the rotating shaft to lift the emergency pump, thereby solving the problem that the crane needs to be operated twice when lifting a section of steel wire rope, and the steel wire rope needs to be fixed before the lifting hook is lowered each time, and the operation is relatively complicated. Meanwhile, the moving amount of the lifting rod is small, and it is not necessary to shift a large amount of shielding objects, and the operation is relatively convenient.

[0025] The crane in the application comprises the lifting structure, and the same technical effects can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1a A structure diagram of a crane in the prior art connecting a first section of steel wire rope in a lifting well before lifting;

[0027] Figure 1b A structure diagram of a crane in the prior art lifting a second section of steel wire rope to the lifting well mouth;

[0028] Figure 1c A structure diagram of a crane in the prior art fixing the second section of steel wire rope protruding from the lifting well mouth and hanging the lifting hook to the second section of steel wire rope;

[0029] Figure 2a A structure diagram of a crane in the embodiment of the application;

[0030] Figure 2b An enlarged view of A in FIG. 6; Figure 2a

[0031] Figure 3a A front view of the rotating shaft of the crane in the embodiment of the application;

[0032] Figure 3b A side view of the rotating shaft of the crane in the embodiment of the application;

[0033] Figure 4a A front view of the rotating shaft shell of the crane in the embodiment of the application;

[0034] Figure 4b A side view of the rotating shaft shell of the crane in the embodiment of the application; ​

[0035] Figure 5a is a front view of the chain in the embodiment of the present application;

[0036] Figure 5b is a side view of the chain in the embodiment of the present application;

[0037] Figure 6 is an assembly view of the chain and the rotating shaft in the embodiment of the present application;

[0038] Figure 7a is a structural schematic view of the first section of wire rope connected in the hoisting shaft before hoisting by the crane in the embodiment of the present application;

[0039] Figure 7b is a front view of Figure 7a is an enlarged view of B in the middle;

[0040] Figure 8a is a structural schematic view of the first section of wire rope hoisted by the crane in the embodiment of the present application;

[0041] Figure 8b is a front view of Figure 8a is an enlarged view of C in the middle.

[0042] List of reference signs:

[0043] 001 hook 34 protruding structure

[0044] 1 hoisting rod 4 crane body

[0045] 11 hoisting end 41 crane base

[0046] 12 fixed end 42 slewing support device

[0047] 2 rotating shaft 43 stand column

[0048] 21 first gear 44 driving device

[0049] 22 second gear 50 emergency pump

[0050] 23 rotating shaft shell 51 first section of wire rope

[0051] 24 opening 52 second section of wire rope

[0052] 3 chain 53 third section of wire rope

[0053] 31 first chain 54 first hoisting plate

[0054] 311 first hook 55 second hoisting plate

[0055] 32 meshing chain 56 third hoisting plate

[0056] 33 second chain 6 hoist well

[0057] 331 second hook DETAILED DESCRIPTION

[0058] The present application is herein described, by way of example only, with reference to embodiments thereof. It is to be understood that variations and modifications will be apparent to those skilled in the art and that the application herein disclosed can be practiced in different but equivalent manners that still come within the scope of the application. It is therefore contemplated to cover any and all modifications, variations or equivalents that fall within the scope of the present application. It is intended that the specification and examples be considered as exemplary only, with the true scope of the application being indicated by the following claims.

[0059] It should be noted that the drawings included in the present disclosure are included to illustrate potentially relevant aspects of the present application and are not meant to be limiting in scope, as some aspects of the application can be implemented in a variety of ways outside the scope of the drawings. Furthermore, to the extent that some of the figures can not depict true to scale, the figures are meant to illustrate more functional aspects of the present application rather than the actual shape and appearance of a device. The specification and drawings are, accordingly, to be regarded as illustrative rather than restrictive.

[0060] The following is the lifting method of the emergency pump of the liquefied gas ship in the prior art: referring to Figure 1a , the emergency pump 50 is placed in the hoist well 6, and a steel wire rope is connected to the emergency pump 50. The steel wire rope includes a first lifting plate 54, a first section of steel wire rope 51, a second lifting plate 55, a second section of steel wire rope 52, a third lifting plate 56, and a third section of steel wire rope 53 in sequence, wherein the first section of steel wire rope 51 is connected to the hook 001 through the first lifting plate 54, and the third section of steel wire rope 53 is connected to the emergency pump 50. One end of the boom 1 of the crane is connected to a lifting line, and the lifting line is provided with a hook 001. The hook 001 is connected to the first lifting plate 54. Referring to Figure 1b , in the lifting process, the boom 1 is controlled to rise to drive the hook 001 to hoist the first section of steel wire rope 51 to the hoist well opening. Referring to Figure 1cDue to the limited lifting height of boom 1, generally after the first section of wire rope 51 is fully exposed above the well opening, it is necessary to secure the second lifting plate 55 exposed above the well opening. Then, the hook 001 is disengaged from the first lifting plate 54, and the boom 1 of the crane is lowered so that the hook 001 hooks the second lifting plate 55 exposed above the well opening. The emergency pump 50 is then lifted a second time. This process is repeated until the emergency pump 50 is lifted to the well opening, at which point the lifting operation is complete. However, this lifting method requires two crane operations when lifting a section of wire rope. Before each lowering of the hook, the wire rope suspended above the well opening must be secured, making the operation cumbersome. Furthermore, the crane's vertical movement requires ensuring there are no obstructions in the movement space, adding to the operational inconvenience.

[0061] To address the background technology and the aforementioned technical problems, this embodiment provides a hoisting structure and a crane to simplify the hoisting process and improve hoisting efficiency.

[0062] Example 1

[0063] This embodiment provides a hoisting structure, referring to... Figure 2a The hoisting structure includes a boom 1, a rotating shaft 2, and a chain 3. The boom 1 includes a hoisting end 11 and a fixed end 12. The rotating shaft 2 is located at the hoisting end 11 of the boom 1. (Refer to...) Figure 3a A first gear 21 is provided around the outer periphery of the rotating shaft 2. (Refer to...) Figure 6 Along the extension direction of chain 3, chain 3 sequentially includes a first chain 31, a meshing chain 32, and a second chain 33. The meshing chain 32 meshes with the first gear 21 on the rotating shaft 2. The first chain 31 is located on one side of the rotating shaft 2, and the second chain 33 is located on the other side of the rotating shaft 2. The first chain 31 and the second chain 33 move in opposite directions as the rotating shaft 2 rotates.

[0064] Specifically, refer to Figure 2a The boom 1 includes a lifting end 11 and a fixed end 12. The fixed end 12 is used to fix it to the crane body 4, and the lifting end 11 is used to fix the hook. In this embodiment, the fixed end 12 of the boom 1 is used to fix the rotating shaft 2.

[0065] Reference Figure 3a Alternatively, in configuration 3b, a first gear 21 and a second gear 22 are disposed around the periphery of the rotating shaft 2, and the first gear 21 and the second gear 22 are spaced apart along the extending direction of the rotating shaft 2. The first gear 21 is used to mesh with the meshing chain 32 on the chain 3, and drives the chain 3 to move under the rotation of the rotating shaft 2. The second gear 22 is used to form a driving connection with the drive device 44 to drive the entire rotating shaft 2 to rotate. Optionally, the diameter of the first gear 21 is larger than the diameter of the second gear 22.

[0066] ReferenceFigure 6 The chain 3 is arranged on the periphery of the first gear 21 of the rotating shaft 2 and can move under the rotation of the rotating shaft 2. Referring to Figure 5a or 5b, a plurality of protruding structures 34 are arranged on the chain 3 at intervals along the extension direction of the chain 3, and the protruding structures 34 can engage with the teeth on the first gear 21. Alternatively, referring to Figure 6 The chain 3 comprises, in sequence along the extension direction of the chain 3, a first chain 31, an engaging chain 32 and a second chain 33, and the first chain 31, the engaging chain 32 and the second chain 33 are in an integrated and continuous structure. The engaging chain 32 engages with the first gear 21 on the rotating shaft 2, the first chain 31 is located on one side of the rotating shaft 2, and the second chain 33 is located on the other side of the rotating shaft 2, and both move in opposite directions under the rotation of the rotating shaft 2. During hoisting, the rotation of the first gear 21 drives the chain 3 to move the first chain 31 and the second chain 33 up and down. During the up-and-down movement, when the first chain 31 rises, the second chain 33 falls, and vice versa. In this embodiment, the first chain 31 and the second chain 33 on both sides of the rotating shaft 2 also engage with each other through the protruding structures 34. At this time, the opening 24 on the rotating shaft shell 23 only needs to match the size of the first chain 31 and the second chain 33 engaged together. Due to the mutual engagement of the first chain 31 and the second chain 33 and the mutual engagement of the engaging chain 32 and the first gear 21, hoisting can still be performed even if the first chain 31 does not bear the load and the second chain 33 bears the load. The chain 3 is also provided with a first lifting hook 311 and a second lifting hook 331, wherein the first lifting hook 311 is arranged at one end of the chain 3 close to the first chain 31, and the second lifting hook 331 is arranged at one end of the chain 3 close to the second chain 33. Alternatively, the length of the chain 3 is 2 times the distance from the hoist well 6 to the rotating shaft 2 of the hoist + L, wherein L is the operation allowance for disassembling the lifting hooks during hoisting.

[0067] Alternatively, referring to Figure 4a or 4b, the periphery of the first gear 21 and the second gear 22 of the rotating shaft 2 is also provided with a rotating shaft shell 23, and the rotating shaft shell 23 is also provided with an opening 24, and the first chain 31 and the second chain 33 extend out of the rotating shaft shell 23 through the opening 24. Alternatively, the size of the opening 24 matches the size of the first chain 31 and the second chain 33 extending out. Alternatively, the rotating shaft shell 23 is in a cylindrical shape, the inner diameter of the rotating shaft shell 23 is slightly larger than the outer diameter of the first gear 21, and the difference between the inner diameter of the rotating shaft shell 23 and the outer diameter of the first gear 21 is 1 cm to 5 cm.

[0068] Embodiment 2

[0069] This embodiment also provides a hoist, referring to Figure 2aThe crane comprises the hoisting structure in Embodiment 1 and a crane body 4. The crane body 4 is connected with the fixed end 12 of the boom 1 of the hoisting structure.

[0070] Optionally, referring to Figure 2a , the crane body 4 comprises a crane base 41, a rotary support device 42 and a stand column 43. The crane base 41 is arranged at the bottom end of the crane body 4 and is used to support the crane body 4. The rotary support device 42 is arranged above the crane base 41. The stand column 43 is arranged above the rotary support device 42. The specific structure of the crane body 4 is similar to that in the prior art, and thus will not be described here. Optionally, the crane body 4 further comprises a driving device 44, which is arranged on the stand column 43 and is drivingly connected with the rotating shaft 2 on the boom 1. Optionally, the driving device 44 can be a driving motor or a rotating handle.

[0071] In the process of hoisting by using the crane in the embodiment, referring to Figure 7a and 7b , first, the boom 1 on the crane body 4 is controlled to descend, and the first hook 311 is hooked on the first hoisting plate 54. The driving motor is controlled to rotate forward to drive the second gear 22 to rotate, so that the rotating shaft 2 rotates and the first gear 21 also rotates. Referring to Figure 8a and 8b , the first chain 31 is driven by the first gear 21 to ascend, and the first hoisting plate 54 is slowly hoisted, while the second hook 331 slowly descends. When the second hoisting plate 55 is exposed from the hoistway 6, the driving is stopped and fixed. The descending second hook 331 is hooked on the second hoisting plate 55. At this time, the first chain 31 is still in a stressed state, and the second chain 33 is not stressed. The driving motor is controlled to rotate reversely, at this time, the rotating shaft 2 also reversely rotates, the second chain 33 slowly ascends and is stressed, and the first hook 311 slowly descends and gradually releases the stress. When the second hoisting plate 55 is pulled up by the second hook 331 and the third hoisting plate 56 is exposed from the hoistway, the driving motor is stopped and fixed. At this time, the first hook 311 is taken off from the first hoisting plate 54 and is hooked on the third hoisting plate 56. Until the third steel wire rope 53 and the connected emergency pump 50 are hoisted out of the hoistway 6, the hoisting of the emergency pump 50 is completed.

[0072] In summary, the lifting structure includes a lifting rod, a rotating shaft and a chain. The lifting rod includes a lifting end and a fixed end, and the rotating shaft is arranged at the lifting end of the lifting rod and has a first gear arranged on the periphery. The chain includes a first chain, an engaging chain and a second chain in sequence along the extension direction of the chain. The engaging chain is engaged with the first gear on the rotating shaft, the first chain is located on one side of the rotating shaft, the second chain is located on the other side of the rotating shaft, and the first chain and the second chain move in opposite directions along with the rotation of the rotating shaft. The rotating shaft is arranged at the lifting end of the lifting rod, and the chain is engaged with the first gear on the rotating shaft. The first chain and the second chain on both sides of the rotating shaft are driven to move in opposite directions by controlling the rotation of the rotating shaft to lift the emergency pump, thereby solving the problem that the crane needs to be operated twice when lifting a section of steel wire rope, and the steel wire rope lifted to the well mouth needs to be fixed before the hook is lowered each time, which is relatively complicated. Meanwhile, the moving amount of the lifting rod is small, and it is not necessary to shift a large amount of shielding objects, and the operation is relatively convenient.

[0073] The crane described in the present application includes the lifting structure described above, and can also achieve the technical effects described above.

[0074] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought of the present application should be covered by the claims of the present application.

Claims

1. A hoisting structure, characterized in that, include: The boom includes the lifting end and the fixed end; A rotating shaft is fixedly installed at the lifting end of the boom, and a first gear is provided around the rotating shaft; A chain, along its extension direction, sequentially includes a first chain, a meshing chain, and a second chain; wherein the meshing chain meshes with a first gear on a rotating shaft, the first chain is located on one side of the rotating shaft, and the second chain is located on the other side of the rotating shaft, the first chain and the second chain move in opposite directions as the rotating shaft rotates; the chain includes a plurality of protruding structures, the plurality of protruding structures being spaced apart along the extension direction of the chain, the protruding structures being capable of meshing with teeth on the first gear, the first chain and the second chain meshing through the protruding structures, a first hook being provided at one end of the chain near the first chain, and a second hook being provided at one end of the chain near the second chain.

2. The hoisting structure according to claim 1, characterized in that, Also includes: The second gear is disposed at a distance from the first gear on the periphery of the rotating shaft.

3. The hoisting structure according to claim 1, characterized in that, Also includes: A rotating shaft housing is disposed around the first gear of the rotating shaft. The rotating shaft housing is also provided with an opening through which the first chain and the second chain extend out of the rotating shaft housing.

4. The hoisting structure according to claim 3, characterized in that, The rotating shaft housing is cylindrical, and the inner diameter of the rotating shaft housing is larger than the outer diameter of the first gear, with the difference between the inner diameter of the rotating shaft housing and the outer diameter of the first gear being 1 cm to 5 cm.

5. A crane, characterized in that, It includes a hoisting structure as described in any one of claims 1 to 4 and a crane body, wherein the crane body is connected to the fixed end of the hoisting rod of the hoisting structure.

6. The crane according to claim 5, characterized in that, The crane also includes: The drive unit is mounted on the crane body and is driven by the rotating shaft.

7. The crane according to claim 6, characterized in that, The driving device is a drive motor or a rotating handle.

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