Auxiliary crane displacement method for crane ship and crane ship system

Abstract

The present invention discloses a displacement method of an auxiliary crane for a crane ship and a crane ship system. The displacement method of the auxiliary crane for a crane ship comprises the following steps: the main crane uses a lifting sling to lift the auxiliary crane as a whole; the main crane performs a luffing rotation to move the auxiliary crane to a target position. The displacement method of the present invention can directly use the main crane to lift the auxiliary crane as a whole and then shift the whole machine. Therefore, when the auxiliary crane moves on a crane ship or between crane ships at sea, there is no need to disassemble and reassemble the auxiliary crane, thereby improving efficiency and facilitating displacement.

Description

Technical Field

[0001] The invention relates to the technical field of engineering machinery, and in particular to a displacement method of an auxiliary crane for a crane ship and a crane ship system. Background Art

[0002] A crane ship is also called a floating crane or a ship crane. It has lifting equipment on board and can move on the water to perform offshore lifting operations. Large crane ships, in addition to their own cranes, usually need to be equipped with an auxiliary crane to lift some small parts to achieve the transfer of objects on board and the transfer and lifting between two ships at sea. Crawler cranes are often used as the first choice for auxiliary cranes.

[0003] The operation of crawler cranes on ships is different from that on land. Due to the limited space on ships, during use, obstacles on the hull deck often block the passage, making it difficult for the crane to reach other designated lifting work positions on the deck by walking. Moreover, during the transfer process (the crawler crane is transferred from one ship to another ship for operation), if the crawler crane is disassembled and transported to another ship for assembly by a transport vehicle as it is used on land, it is too inefficient, and two crane ships must be docked at the dock at the same time. When the crane ship is operating at sea and needs to transfer the auxiliary crawler crane to another crane ship for operation, the traditional method cannot be achieved. Summary of the invention

[0004] The object of the present invention is to provide a method for shifting an auxiliary crane for a crane ship and a crane ship system to facilitate the movement of the auxiliary crane.

[0005] A first aspect of the present invention provides a method for shifting an auxiliary crane for a crane vessel, comprising the following steps:

[0006] The main crane uses the lifting sling to lift the auxiliary crane as a whole;

[0007] The main crane luffs and slews to move the auxiliary crane to the target position.

[0008] In some embodiments, luffing and slewing the main crane to move the auxiliary crane to the target position includes luffing and slewing the main crane to move the auxiliary crane from an initial position on a crane vessel where the auxiliary crane is located to a target position on the crane vessel or moving the auxiliary crane from an initial position on a crane vessel where the auxiliary crane is located to a target position on another crane vessel.

[0009] In some embodiments, the displacement method further includes connecting the lifting sling and the turntable of the auxiliary crane to at least three lifting connection points and adjusting the center of gravity of the auxiliary crane between the at least three lifting connection points before the main crane uses the lifting sling to lift the auxiliary crane.

[0010] In some embodiments, the center of gravity of the assisting crane is adjusted by controlling the boom angle of the assisting crane during the process of moving the assisting crane to the target position.

[0011] In some embodiments, the center of gravity of the auxiliary crane is adjusted by controlling the luffing of the auxiliary crane according to the tilt angle of the auxiliary crane.

[0012] A second aspect of the present invention provides a crane vessel system, comprising:

[0013] crane ship;

[0014] Main crane and auxiliary crane, located on the crane vessel; and

[0015] The lifting sling is used to connect with the hook of the main crane and the auxiliary crane so that the main crane can shift the auxiliary crane.

[0016] In some embodiments, the lifting sling comprises:

[0017] A sling connection assembly for connection with the main crane; and

[0018] Balance beam for connecting sling connection assembly and auxiliary hoist.

[0019] In some embodiments, the balance beam has at least three lifting connection points for connection with the auxiliary crane.

[0020] In some embodiments, the balance beam includes a square frame structure having four lifting connection points.

[0021] In some embodiments, the square frame structure includes circumferential connecting rods that are sequentially connected and enclosed along the circumference and intermediate connecting rods that are arranged inside and cross-arranged.

[0022] In some embodiments, the lifting sling further includes a pull plate assembly disposed between the balance beam and the auxiliary crane, and the pull plate assembly includes at least three pull plate groups disposed corresponding to at least three lifting connection points.

[0023] In some embodiments, the pull plate group includes at least two pull plates connected in sequence and a transition portion located at the end, wherein the transition portion is used to connect the pull plates and the balance beam and is rotatably arranged relative to the pull plates.

[0024] In some embodiments, the adapter portion includes a first adapter plate and a second adapter plate and a third adapter plate that are arranged in parallel and spaced apart from each other, and the second adapter plate and the third adapter plate are perpendicular to the first adapter plate.

[0025] Based on the technical solution provided by the present invention, the displacement method can directly utilize the main crane to lift the auxiliary crane as a whole and then shift the whole machine. Therefore, when the auxiliary crane is moved on a crane ship or between crane ships at sea, there is no need to disassemble and reassemble the auxiliary crane, thereby improving efficiency and facilitating displacement.

[0026] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0028] Figure 1 It is a front view structural schematic diagram of a crane vessel system according to an embodiment of the present invention;

[0029] Figure 2 for Figure 1 A side structural schematic diagram of the crane ship system shown;

[0030] Figure 3 for Figure 1 The structural diagram of the lifting sling in FIG.

[0031] Figure 4 for Figure 3 The structural diagram of the balance beam in FIG.

[0032] Figure 5 for Figure 3 A schematic diagram of the structure of the pull plate group in FIG.

[0033] Figure 6 for Figure 5 A schematic diagram of the structure of the transfer part;

[0034] Figure 7 for Figure 1 Schematic diagram of the structure of the auxiliary crane turntable.

[0035] The reference numerals represent:

[0036] 1. Lifting sling; 11. Sling connection assembly; 12. Shackle; 13. Balance beam; 131. Circumferential connecting rod; 132. Intermediate connecting rod; 133. Upper ear plate; 134. Lower ear plate; 14. Pull plate assembly; 141. Double pull plate; 142. Single pull plate; 144. Adapter; 2. Main crane hook; 3. Auxiliary crane; 31. Auxiliary crane turntable; DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0039] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0040] like Figure 1 and Figure 2 As shown, the displacement method of the auxiliary crane for the crane ship according to the embodiment of the present invention comprises the following steps:

[0041] The main crane uses the lifting sling 1 to lift the auxiliary crane 3 as a whole;

[0042] The main crane luffs and slews to move the auxiliary crane 3 to the target position.

[0043] The displacement method of the embodiment of the present invention can directly use the main crane to lift the auxiliary crane 3 as a whole and then shift the whole machine. Therefore, when the auxiliary crane is moved on a crane ship or between crane ships at sea, there is no need to disassemble and reassemble the auxiliary crane, thereby improving efficiency and facilitating displacement.

[0044] In this embodiment, the main crane changes its length and turns to move the auxiliary crane to the target position, including the main crane changing its length and turning to move the auxiliary crane from the initial position on the crane ship where the auxiliary crane is located to the target position on the crane ship, or moving the auxiliary crane from the initial position on the crane ship where the auxiliary crane is located to the target position on another crane ship. That is to say, when the auxiliary crane 3 needs to be moved from one position on the crane ship to another position (target position), when it encounters obstacles on the deck and cannot move on its own, the main crane can directly lift the entire machine. When the auxiliary crane 3 needs to be moved from a crane ship operating at sea to another crane ship operating at sea, it can also be directly lifted and displaced by the main crane of the crane ship where the auxiliary crane is located.

[0045] Since the auxiliary crane is large in size and weight, in order to improve the stability during the shifting process, the shifting method of this embodiment also includes connecting the lifting sling 1 and the auxiliary crane turntable 31 to at least three lifting connection points A and adjusting the center of gravity of the auxiliary crane 3 between the at least three lifting connection points before the main crane uses the lifting sling 1 to lift the auxiliary crane 3 as a whole.

[0046] Specifically in this embodiment, Figure 7 As shown, the auxiliary crane turntable 31 of this embodiment is connected to the lifting sling 1 at four lifting connection points. And the center of gravity of the auxiliary crane is located within the span of the four lifting connection points. Two of the four lifting connection points of this embodiment are arranged at the front of the turntable 31, and the other two are arranged at the rear of the turntable, so that the center of gravity of the whole machine is included in its span.

[0047] Since the auxiliary crane is large in size, in order to avoid its own boom and other structures during the lifting process, the lifting sling of this embodiment needs to be set to a very long height. Therefore, the entire auxiliary crane will shake during the shifting process, and the center of gravity of the auxiliary crane may deflect and cause unstable shifting. Therefore, the shifting method of this embodiment also includes controlling the boom angle α of the auxiliary crane 3 to adjust the center of gravity of the auxiliary crane 3 during the process of moving the auxiliary crane 3 to the target position.

[0048] Preferably, the center of gravity of the auxiliary crane 3 is adjusted within a suitable range by controlling the boom angle of the auxiliary crane 3 .

[0049] In this embodiment, the auxiliary crane is controlled to change its amplitude according to the tilt angle of the auxiliary crane to adjust the center of gravity of the auxiliary crane. For example, a sensor can be set on the turntable of the auxiliary crane to measure the tilt angle of the auxiliary crane in real time, and the auxiliary crane is controlled to change its amplitude according to the tilt angle measured by the sensor.

[0050] The embodiment of the present invention further provides a crane vessel system. The crane vessel system comprises:

[0051] crane ship;

[0052] A main crane and an auxiliary crane 3 are provided on a crane vessel; and

[0053] The lifting sling 1 is used to be connected with the hook 2 of the main crane and the auxiliary crane 3 so that the main crane can move the auxiliary crane 3 as a whole.

[0054] The crane ship system directly utilizes the main crane and the lifting sling 1 to move the auxiliary crane 3 as a whole. Therefore, when the auxiliary crane is moved on the crane ship or between crane ships at sea, there is no need to disassemble and reassemble the auxiliary crane, thereby improving efficiency and facilitating movement.

[0055] like Figure 3 As shown, the lifting sling of this embodiment includes:

[0056] A sling connection assembly 11, used for connection with a main crane; and

[0057] The balance beam 13 is used to connect the sling connection assembly 11 and the auxiliary crane 3.

[0058] The balance beam 13 has at least three lifting connection points connected to the auxiliary crane 3. The center of gravity of the auxiliary crane 3 is located within the span of at least three lifting connection points, thereby improving the lifting stability and safety of the auxiliary crane.

[0059] like Figure 3 As shown, the sling connection assembly 11 and the balance beam 13 of this embodiment are detachably connected via a shackle 12 .

[0060] like Figure 4 As shown, the balance beam 13 of this embodiment includes a square frame structure, and the square frame structure has four lifting connection points.

[0061] The square frame structure includes circumferential connecting rods 131 which are sequentially connected and enclosed along the circumference and intermediate connecting rods 132 which are arranged inside and crosswise.

[0062] The lifting sling 1 further comprises a plate pulling assembly arranged between the balance beam 13 and the auxiliary crane 3 , and the plate pulling assembly comprises at least three plate pulling groups 14 arranged corresponding to at least three lifting connection points.

[0063] like Figure 4 As shown, the balance beam 13 includes four upper lug plates 133 located on its upper side and four lower lug plates 134 located on its lower side. The balance beam 13 is hinged to the sling connection assembly 11 through the upper lug plates 133, and is hinged to the pull plate group 14 through the lower lug plates 134.

[0064] The pull plate assembly 14 includes at least two pull plates connected in sequence and an adapter portion 144 located at the end. The adapter portion 144 is rotatably arranged relative to the pull plates.

[0065] Specifically in this embodiment, the pull plate group 14 includes a single pull plate 141 and a double pull plate 142 arranged at intervals. A transition portion is provided at the end of the pull plate group 14. In order to ensure that the pull plate can rotate with multiple degrees of freedom, the head and tail of the pull plate each have a transition portion, and the transition portion is also connected to other pull plates through a pin shaft. The single pull plate 141 and the double pull plates 142, as well as the pull plate group 14 and the single pull plate 141 located at the end are all connected through a pin shaft.

[0066] like Figure 6 As shown, the adapter portion 144 of this embodiment includes a first adapter plate and a second adapter plate and a third adapter plate that are arranged in parallel and spaced apart from each other. The second adapter plate and the third adapter plate are perpendicular to the first adapter plate.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A method for shifting an auxiliary crane for a crane ship, wherein the crane ship is provided with a main crane and an auxiliary crane, characterized in that: The steps include: Connecting the lifting sling and the turntable of the auxiliary crane to at least three lifting connection points and adjusting the center of gravity of the auxiliary crane between the at least three lifting connection points; The main crane uses a lifting sling to lift the auxiliary crane as a whole; The main crane luffs and slews to move the auxiliary crane from an initial position on the crane ship where the auxiliary crane is located to a target position on the crane ship or to move the auxiliary crane from an initial position on the crane ship where the auxiliary crane is located to a target position on another crane ship; In the process of moving the auxiliary crane to the target position, the auxiliary crane is controlled to change its amplitude according to the inclination angle of the auxiliary crane to adjust the center of gravity of the auxiliary crane.

2. A crane vessel system, characterized in that: include: crane ship; A main crane and an auxiliary crane are arranged on the crane vessel; and a lifting sling, used to be connected to the hook of the main crane and the auxiliary crane so that the main crane can shift the auxiliary crane, the lifting sling comprising a sling connection assembly and a balance beam, the sling connection assembly being connected to the main crane, the balance beam connecting the sling connection assembly and the auxiliary crane and having at least three lifting connection points connected to the auxiliary crane; The crane vessel system is configured to move the auxiliary crane using the displacement method of claim 1 .

3. The crane vessel system according to claim 2, characterized in that: The balance beam comprises a square frame structure having four lifting connection points.

4. The crane vessel system according to claim 3, characterized in that: The square frame structure includes circumferential connecting rods which are sequentially connected and enclosed along the circumference and intermediate connecting rods which are arranged inside and crosswise.

5. The crane vessel system according to any one of claims 2 to 4, characterized in that: The lifting sling further includes a pull plate assembly disposed between the balance beam and the auxiliary crane, and the pull plate assembly includes at least three pull plate groups disposed corresponding to the at least three lifting connection points.

6. The crane vessel system according to claim 5, characterized in that: The pull plate group includes at least two pull plates connected in sequence and a transition portion located at the end, wherein the transition portion is used to connect the pull plates and the balance beam and is rotatably arranged relative to the pull plates.

7. The crane vessel system according to claim 6, characterized in that: The adapter portion includes a first adapter plate and a second adapter plate and a third adapter plate which are arranged in parallel and spaced apart from each other. The second adapter plate and the third adapter plate are perpendicular to the first adapter plate.

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