Gantry crane steel wire rope winding structure and portal crane applying same

Abstract

The utility model provides a gantry crane steel wire rope winding structure and a gantry crane applying the same, and belongs to the technical field of gantry cranes. The winding unit comprises a winding drum, a stand column guide pulley and a stand column compensation pulley which are arranged on a stand column of the crane, and an arm frame guide pulley and an arm frame compensation pulley which are arranged on a cargo boom; one end of the steel wire rope is fixed on the winding drum, the other end of the steel wire rope sequentially bypasses the upright post guide pulley, the boom compensation pulley, the upright post compensation pulley and the boom guide pulley and then is connected with the lifting appliance, and the winding directions of the steel wire rope at the upright post guide pulley, the boom compensation pulley, the upright post compensation pulley and the boom guide pulley are the same; the steel wire rope has the advantages that fatigue and abrasion of the steel wire rope in the long-term use process can be reduced, the service life of the steel wire rope is prolonged, and the cost of port equipment is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of portal cranes, and particularly relates to a portal crane wire rope winding structure and a portal crane using the same. Background Art

[0002] A gantry crane is a jib-type crane whose bridge is supported on a ground track or foundation by legs on both sides, and is one of the general cranes at the front of the dock.

[0003] Currently, existing gantry cranes can be categorized by boom structure type into four-link combination boom gantry cranes and single-boom gantry cranes. Single-boom gantry cranes commonly utilize a pulley system to compensate for height differences during luffing. To facilitate the layout of the wire rope winding system, the wire rope is typically routed around the column guide pulley, then directly through the boom compensating pulley, and then back to the column compensating pulley between the column guide pulley and the boom compensating pulley before being connected to the hook.

[0004] However, the existing wire rope winding system still has certain defects in designing the position of the pulley block and winding the wire rope: when winding the wire rope, the existing wire rope winding system often bends the wire rope in opposite directions at different positions, thereby increasing the fatigue and wear of the wire rope during long-term use, thereby reducing the service life of the wire rope. Summary of the Invention

[0005] The technical problem solved by the utility model is to provide a new type of gantry crane wire rope winding structure and a gantry crane using the same, so that the fatigue and wear of the wire rope can be reduced during long-term use, thereby extending the service life of the wire rope and reducing the cost of port equipment.

[0006] In order to solve the above technical problems, on the one hand, the utility model provides a wire rope winding structure of a gantry crane, which includes at least one group of winding units, wherein the winding unit includes a drum, a column guide pulley and a column compensating pulley arranged on the crane column, and a boom guide pulley and a boom compensating pulley arranged on the boom, the column compensating pulley is located on the side of the boom compensating pulley close to the column guide pulley, and the boom guide pulley is located on the side of the column guide pulley close to the boom compensating pulley; one end of the wire rope is fixed on the drum, and the other end is connected to the sling after passing through the column guide pulley, the boom compensating pulley, the column compensating pulley, and the boom guide pulley in turn, and the winding direction of the wire rope at the column guide pulley, the boom compensating pulley, the column compensating pulley and the boom guide pulley is all clockwise, or the winding direction of the wire rope at the column guide pulley, the boom compensating pulley, the column compensating pulley and the boom guide pulley is all counterclockwise. In this way, it can not only maintain the stability of the height of the hoisted cargo by changing the length of the wire rope caused by the relative position change between the column compensation pulley and the boom guide pulley during the boom amplitude change process, but also ensure that the wire rope bends in the same direction through the above-mentioned wire rope winding arrangement method, avoiding the reverse bending of conventional multi-rate wire ropes at the corresponding positions, thereby improving the fatigue life of the wire rope.

[0007] Furthermore, the height of the column compensation pulley is higher or lower than the height of the column guide pulley, so as to facilitate the winding of the wire rope and effectively reduce the possibility of the wire rope being knotted.

[0008] Furthermore, the height of the boom guide pulley is higher or lower than the boom compensation pulley, so as to facilitate the winding of the wire rope and effectively reduce the possibility of the wire rope being tangled.

[0009] Furthermore, the column guide pulley, the arm compensation pulley, the column compensation pulley and the arm guide pulley are all fixed pulleys.

[0010] Furthermore, the steel wire rope is a compacted strand steel wire rope, which can ensure that the steel wire rope has higher strength and wear resistance.

[0011] On the other hand, the utility model also provides a gantry crane using the above-mentioned gantry crane wire rope winding structure, which includes a crane body, on which the above-mentioned gantry crane wire rope winding structure is installed, and the above-mentioned structure can be used to achieve amplitude compensation.

[0012] Furthermore, the crane body includes a slewing mechanism, a turntable is installed at the power output end of the slewing mechanism, a boom is rotatably installed on the upper part of the turntable, and the boom is connected to a lifting mechanism; a column is fixedly installed on the upper part of the turntable, a luffing mechanism is connected between the middle part of the column and the middle part of the boom, a balance beam is rotatably installed on the upper part of the column, one end of the balance beam is provided with a counterweight block, the other end of the balance beam is hinged to a pull rod, and the end of the pull rod away from the balance beam is hinged to the middle part of the boom. When working in this way, the utility model can drive the boom to move through the luffing rack in the luffing mechanism to achieve the change of the crane operating amplitude; at the same time, the boom can also drive the balance beam to move through the pull rod to balance the torque of the boom on the lower hinge point of the boom during the luffing process, thereby optimizing the force on the boom; and the height change of the counterweight block provided at the balance beam keeps the overall center of gravity of the upper moving component stable, thereby significantly reducing the load of the luffing motor, achieving the purpose of energy saving, efficiency reduction and cost control.

[0013] It can be seen from the above technical solution that the utility model has the following advantages: it can maintain the stability of the height of the hoisted cargo by changing the length of the wire rope caused by the relative position change between the column compensation pulley and the boom guide pulley during the boom amplitude change process, and can ensure that the wire rope is bent in the same direction through the above-mentioned wire rope winding arrangement method, avoiding the reverse bending of conventional multi-rate wire ropes at the corresponding position, thereby improving the fatigue life of the wire rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic structural diagram of Example 1 of the present utility model;

[0016] Figure 2 This is a structural diagram of Example 2 of the present utility model.

[0017] In the figure: 1. drum, 2. column guide pulley, 3. column compensating pulley, 4. boom guide pulley, 5. boom compensating pulley, 6. sling, 7. wire rope; 8. turntable; 9. lifting mechanism; 10. luffing mechanism; 11. counterweight; 12. balance beam; 13. pull rod; 14. winding unit; 15. crane arm; 16. slewing mechanism. DETAILED DESCRIPTION

[0018] 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 embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example 1

[0020] like Figure 1 As shown, the utility model provides a wire rope winding structure for a gantry crane, which includes at least one group of winding units 14, wherein the winding unit 14 includes a drum 1, a column guide pulley 2 and a column compensating pulley 3 arranged on the crane column, and a boom guide pulley 4 and a boom compensating pulley 5 arranged on the boom 15, wherein the column guide pulley 2, the boom compensating pulley 5, the column compensating pulley 3 and the boom guide pulley 4 are all fixed pulleys, and the column compensating pulley 3 is located on the side of the boom compensating pulley 5 close to the column guide pulley 2, and the height of the column compensating pulley 3 is higher or lower than the height of the column guide pulley 2; the boom guide pulley 4 is located on the side of the column guide pulley 2 close to the boom compensating pulley 5, and the height of the boom guide pulley 4 is higher or lower than the boom compensating pulley 5.

[0021] One end of the wire rope 7 is fixed on the drum 1, and the other end is connected to the sling 6 after passing through the column guide pulley 2, the boom compensating pulley 5, the column compensating pulley 3, and the boom guide pulley 4 in sequence, and the winding direction of the wire rope 7 at the column guide pulley 2, the boom compensating pulley 5, the column compensating pulley 3 and the boom guide pulley 4 is clockwise, or the winding direction of the wire rope 7 at the column guide pulley 2, the boom compensating pulley 5, the column compensating pulley 3 and the boom guide pulley 4 is counterclockwise, and the wire rope 7 is preferably a rotation-resistant compacted strand wire rope to ensure that the wire rope 7 has higher strength and wear resistance, and effectively reduce the possibility of the wire rope 7 getting knotted and the lifted object rotating.

[0022] Based on this, the first embodiment of the present invention can not only maintain the stability of the height of the hoisted cargo by changing the length of the wire rope 7 caused by the relative position change between the column compensation pulley 3 and the boom guide pulley 4 during the boom amplitude change process, but also ensure that the wire rope 7 is bent in the same direction through the above-mentioned wire rope winding arrangement, thereby avoiding the reverse bending of the conventional multi-rate wire rope 7 at the corresponding position, thereby improving the fatigue life of the wire rope 7.

[0023] Example 2

[0024] like Figure 2As shown, the second embodiment provides a gantry crane using the above-mentioned gantry crane wire rope winding structure, which includes a crane body, the crane body includes a slewing mechanism 16, a turntable 8 is installed on the power output end of the slewing mechanism 16, a lifting arm 15 is rotatably installed on the upper part of the turntable 8, the lifting arm 15 is connected to a lifting mechanism 9, and the above-mentioned gantry crane wire rope winding structure is arranged between the lifting arm 15 and the column.

[0025] A column is also fixedly installed on the upper part of the turntable 8, and a variable amplitude mechanism 10 is connected between the middle part of the column and the middle part of the lifting arm 15. A balance beam 12 is rotatably installed on the upper part of the column, and a counterweight block 11 is provided at one end of the balance beam 12. A pull rod 13 is hinged at the other end of the balance beam 12, and the end of the pull rod 13 away from the balance beam 12 is hinged to the middle part of the lifting arm 15.

[0026] When working in this way, the second embodiment can drive the boom 15 to move through the luffing rack in the luffing mechanism 10 to achieve a change in the operating amplitude of the crane; at the same time, the boom 15 can also drive the balance beam to move through the pull rod 13 to balance the torque of the boom 15 on the lower hinge point of the boom during the luffing process, thereby optimizing the force on the boom 15; and the height change of the counterweight block 11 provided at the balance beam 12 can keep the overall center of gravity of the upper moving component stable, thereby significantly reducing the load of the luffing motor, achieving the purpose of energy saving, efficiency reduction and cost control.

[0027] The terms "first," "second," "third," "fourth," and so on (if any) in the description and claims of the present invention and the accompanying drawings are used to distinguish similar items and are not necessarily used to describe a particular order or sequential sequence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can be implemented in sequences other than those illustrated or described herein. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0028] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wire rope winding structure for a portal crane, comprising at least one winding unit, wherein the winding unit comprises a drum, a column guide pulley and a column compensation pulley provided on a crane column, and a boom guide pulley and a boom compensation pulley provided on a boom; characterized in that: The column compensating pulley is located on the side of the boom compensating pulley close to the column guide pulley, and the boom guide pulley is located on the side of the column guide pulley close to the boom compensating pulley; one end of the wire rope is fixed on the drum, and the other end is connected to the sling after passing through the column guide pulley, the boom compensating pulley, the column compensating pulley, and the boom guide pulley in sequence, and the winding direction of the wire rope at the column guide pulley, the boom compensating pulley, the column compensating pulley and the boom guide pulley is all clockwise, or the winding direction of the wire rope at the column guide pulley, the boom compensating pulley, the column compensating pulley and the boom guide pulley is all counterclockwise.

2. The wire rope winding structure of the portal crane according to claim 1, characterized in that: The height of the column compensating pulley is higher or lower than the height of the column guide pulley.

3. The wire rope winding structure of the portal crane according to claim 1, characterized in that: The height of the boom guide pulley is higher or lower than the boom compensating pulley.

4. The wire rope winding structure of the portal crane according to claim 1, characterized in that: The column guide pulley, arm compensation pulley, column compensation pulley and arm guide pulley are all fixed pulleys.

5. The wire rope winding structure of the portal crane according to claim 1, characterized in that: The wire rope is a compacted strand wire rope.

6. A portal crane using the portal crane wire rope winding structure according to any one of claims 1 to 5, comprising a crane body, characterized in that: The crane body is equipped with a portal crane wire rope winding structure according to any one of claims 1 to 5.

7. The portal crane according to claim 6, characterized in that: The crane body includes a slewing mechanism, a turntable is installed at the power output end of the slewing mechanism, a boom is rotatably installed on the upper part of the turntable, and the boom is connected to the lifting mechanism; a column is fixedly installed on the upper part of the turntable, a luffing mechanism is connected between the middle part of the column and the middle part of the boom, a balance beam is rotatably installed on the upper part of the column, a counterweight is provided at one end of the balance beam, and a pull rod is hinged at the other end of the balance beam, and the end of the pull rod away from the balance beam is hinged to the middle part of the boom.

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