Anti-rope-swinging device for double-drum winding multi-layer steel wire rope and crane

Abstract

The application provides a rope jumping prevention device for winding a multi-layer steel wire rope on a double winding drum, which is arranged on a trolley frame and located between the trolley frame and the double winding drum. The rope jumping prevention device comprises a first mounting seat, a second mounting seat and a guide rod, both ends of the guide rod are arranged on the first mounting seat and the second mounting seat respectively, a plurality of guide grooves are arranged on the outer side of the guide rod, and at least one end of the guide rod can move towards the direction close to the double winding drum. The steel wire rope is guided by the corresponding rope jumping prevention device, so that when the steel wire rope is wound on the double winding drum or released, a large included angle cannot be generated between the steel wire rope and the radial direction of the double winding drum corresponding to the position of the steel wire rope, the occurrence of rope jumping is effectively avoided, and the safety of the double winding drum during the winding or releasing process of the steel wire rope is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cranes, in particular to an anti-swing device for preventing the occurrence of rope skipping when winding multiple layers of steel wire rope on a double drum, and a crane with the anti-swing device. BACKGROUND

[0002] In some infrastructure processes, the foundation pit often needs to be excavated for tens of meters or even hundreds of meters. In order to be able to discharge the muck at the bottom of the deep pit, a common way is to use a drum crane to cooperate with a lifting tool to transport the muck out from the bottom of the foundation pit.

[0003] Due to the limited space of the foundation pit in the radial direction, in order to reduce the amplitude of the radial swing of the electric lifting tool during the up and down movement, avoid the collision between the lifting tool and the side wall of the foundation pit, and ensure that the lifting tool can move up and down as vertically as possible, two groups of synchronous steel wire ropes are arranged on the drum and are connected with two fixed pulleys with a certain interval. However, due to the depth of the foundation pit, the length of the steel wire rope also increases, resulting in the need to wind multiple layers of steel wire rope on the drum. When winding the first layer of steel wire rope, the drum is provided with a rope groove, so that the rope skipping phenomenon almost does not occur during winding. However, after the winding of the first layer of steel wire rope is completed, the winding of the second layer or even the third layer of steel wire rope will be carried out. At this time, due to the absence of the rope groove, combined with the fact that the steel wire rope is coated with lubricating oil, the angle of the two steel wire ropes wound on the drum gradually changes due to the fixed interval between the corresponding fixed pulleys, and the rope skipping phenomenon is likely to occur during the process of gradually increasing or gradually decreasing the angle from the maximum angle. This causes the inconsistent winding of the steel wire ropes on both sides of the drum, resulting in the shaking of the lifting tool and the drum, the overturning of the hoisted object, the large wear of the steel wire rope, the large impact on the support frame of the crane, and even the overturning of the crane.

[0004] The existing anti-swing device is almost designed for the winding of single layer of steel wire rope. The guide rod, guide rope wheel and tension spring are arranged to guide the steel wire rope. The guide rope wheel moves along the axial direction of the guide rod during the guiding of the steel wire rope, so that the steel wire rope can be wound in order according to the rope groove on the drum. However, for the drum after the winding of the first layer, there is no rope groove when winding the second layer or even the third layer of steel wire rope. The guide rope wheel of the existing anti-swing device is difficult to overcome the force of the steel wire rope between the drum and the fixed pulley, and cannot effectively guide the steel wire rope to continue to be wound closely and orderly on the drum. SUMMARY

[0005] In view of this, it is necessary to provide a rope anti-swing device capable of guiding the steel wire rope during the winding and releasing of the second layer or even the third layer of the steel wire rope by the double drum and a crane with the rope anti-swing device.

[0006] The present application provides a rope anti-swing device for winding multiple layers of steel wire rope by a double drum, which is arranged on a trolley frame and located between the trolley frame and the double drum. The rope anti-swing device is provided with two groups, one of which corresponds to the left section of the double drum, and the other of which corresponds to the right section of the double drum. The rope anti-swing device comprises a first mounting seat, a second mounting seat and a guide rod, both ends of the guide rod are arranged on the first mounting seat and the second mounting seat, respectively, a plurality of guide grooves are arranged on the outer side of the guide rod, and at least one end of the guide rod can move towards the direction close to the double drum, so that the guide rod can limit the steel wire rope located in the guide groove. The double drum is arranged on the upper surface of the trolley frame and spaced apart from the upper surface of the trolley frame by a certain distance, and the two rope anti-swing devices are symmetrically arranged.

[0007] Further, along the axial direction of the guide rod, the guide rod is rotatably arranged on the first mounting seat and the second mounting seat, and the guide groove is an annular groove.

[0008] Further, along the horizontal direction, one end of the guide rod is rotatably arranged on the first mounting seat, and the other end of the guide rod is connected with the second mounting seat through an adjusting mechanism, and the adjusting mechanism is used for adjusting the distance between the guide rod and the second mounting seat in the horizontal direction.

[0009] Further, the adjusting mechanism is a gas cylinder or a push rod.

[0010] Further, the adjusting mechanism comprises a push column screw-connected on the second mounting seat, one end of the push column is connected with the guide rod through the second mounting seat, and the position of the guide rod relative to the second mounting seat is changed by rotating the push column.

[0011] Further, a spring is sleeved on the push column, one end of the spring abuts against the second mounting seat, and the other end of the spring abuts against the guide rod.

[0012] Further, the depth of the guide groove is not more than the diameter of the steel wire rope.

[0013] Further, the depth of the guide groove is half of the diameter of the steel wire rope.

[0014] The application further provides a crane, which comprises the anti-rope-swinging device for winding a multi-layer steel wire rope on a double drum according to any one of the above solutions, and further comprises a bridge and a trolley, wherein the trolley is arranged on the bridge, and the trolley comprises a double drum, a driving device, a trolley frame, a lifting tool and two steel wire ropes, the double drum and the driving device are arranged on the trolley frame, the two steel wire ropes are connected between the lifting tool and the double drum respectively, and the driving device is used for driving the double drum to rotate to wind or release the steel wire rope so that the lifting tool is lifted or lowered.

[0015] Further, the bottom of the trolley frame is provided with two first fixed pulley blocks at a certain distance, each of the first fixed pulley blocks comprises two coaxially arranged first fixed pulleys, the lifting tool comprises a lifting frame and a lifting hook, the lifting hook is arranged on the lifting frame, the lifting frame is provided with two second fixed pulley blocks corresponding to the two first fixed pulley blocks, each of the second fixed pulley blocks comprises two coaxially arranged second fixed pulleys, and one of the steel wire ropes is connected with the lifting frame after being wound around one of the second fixed pulleys, one of the first fixed pulleys, another one of the second fixed pulleys of the same second fixed pulley block and another one of the first fixed pulleys of the same first fixed pulley block in sequence from the left section or the right section of the double drum.

[0016] Compared with the prior art, the application has the following beneficial effects: by arranging one anti-rope-swinging device corresponding to the left section and the right section of the double drum on the trolley frame, the anti-rope-swinging device comprises a first mounting seat, a second mounting seat and a guide rod, the two ends of the guide rod are arranged on the first mounting seat and the second mounting seat respectively, a plurality of guide grooves are arranged on the outer side of the guide rod, and at least one end of the guide rod can move towards the direction close to the double drum, so that the guide rod can limit the steel wire rope located in the guide groove, and when the double drum winds or releases the second layer or the third layer of the steel wire rope, the corresponding anti-rope-swinging device guides the steel wire rope, so that when the steel wire rope is wound or released on the double drum, a large included angle cannot be generated between the steel wire rope and the radial direction of the double drum corresponding to the position of the steel wire rope, and the occurrence of rope-swinging phenomenon is effectively avoided, and the safety of the double drum during the winding or releasing process of the steel wire rope is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole schematic view of the embodiment of the anti-rope-swinging device.

[0018] Figure 2 It is a whole schematic view of the embodiment of the anti-rope-swinging device. Figure 1 It is a sectional view along A-A.

[0019] Figure 3 It is a sectional view along A-A. Figure 1Enlarged view at A.

[0020] Figure 4 For Figure 1 Enlarged view at B.

[0021] Figure 5 Overall schematic view of the crane embodiment of the invention. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application. It can be understood that the drawings are only provided for reference and illustration, and are not used to limit the present application. The connection relationship shown in the drawings is only for clear description, and does not limit the connection mode.

[0023] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component, or a middle component can exist at the same time. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs. It should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application.

[0024] It should be noted that in the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0025] Please refer to Figure 1 and Figure 5The application provides a rope jumping prevention device 100 for winding a multi-layer steel wire rope on a double drum, which is arranged on a trolley frame 200 and located between the trolley frame 200 and the double drum 300, and is used for guiding the steel wire rope 400 when the double drum 300 winds or releases the second layer, the third layer or more layers of the steel wire rope 400, so as to avoid that the steel wire rope 400 has a too large angle with the corresponding position on the double drum 300 when the steel wire rope 400 is wound or released on the double drum 300, and the steel wire rope 400 jumps, the lengths of the steel wire rope 400 corresponding to the left section 310 and the right section 320 of the double drum 300 are inconsistent, the lifting appliance 500 is inclined, the swinging range is increased, the normal lifting is affected, and even the crane is overturned, and a safety accident is caused.

[0026] The double drum 300 is arranged on the upper surface of the trolley frame 200 and is spaced apart from the upper surface of the trolley frame 200 by a certain distance.

[0027] The rope jumping prevention device 100 is provided with two groups, one rope jumping prevention device 100 corresponds to the left section 310 of the double drum 300, and the other rope jumping prevention device 100 corresponds to the right section 320 of the double drum 300. Among them, the two rope jumping prevention devices 100 are symmetrically arranged along the plane where the flange of the middle position of the double drum 300 is located.

[0028] Please refer to Figures 2-4 and combine Figure 1 The rope jumping prevention device 100 includes a first mounting seat 110, a second mounting seat 120 and a guide rod 130, and the two ends of the guide rod 130 are arranged on the first mounting seat 110 and the second mounting seat 120 respectively.

[0029] A plurality of guide grooves 131 are arranged on the outer side of the guide rod 130, and at least one end of the guide rod 130 can move towards the direction close to the double drum 300, so that the guide rod 130 can limit the steel wire rope 400 located in the guide groove 131, thereby playing a guiding role and avoiding that the steel wire rope 400 cannot be arranged in order and close to each other without limitation.

[0030] In an embodiment, the two ends of the guide rod 130 can move towards or away from the double drum 300 under the action of an adjusting mechanism 140, so that the guide rod 130 can guide the winding or release of the two steel wire ropes 400 on the double drum 300 corresponding to the left section 310 or the right section 320 respectively.

[0031] Further, the guide rod 130 can be close to or away from the double-drum 300 in a horizontal direction, or can be close to or away from the double-drum 300 in an axial direction of the double-drum 300.

[0032] In another embodiment, one end of the guide rod 130 is rotatably arranged on the first mounting base 110, and the other end of the guide rod 130 is connected to the second mounting base 120 through the adjusting mechanism 140, and the distance between the guide rod 130 and the second mounting base 120 in the horizontal direction is adjusted under the action of the adjusting mechanism 140, so that the one end of the guide rod 130 corresponding to the second mounting base 120 is close to or away from the double-drum 300 with the first mounting base 110 as the rotation center.

[0033] By controlling the anti-swing device 100 to be close to or away from the double-drum 300, the steel wire rope 400 is prevented from jumping, so that the winding speed and the release speed of the two steel wire ropes 400 on the double-drum 300 are consistent, thereby preventing the lengths of the two steel wire ropes 400 between the double-drum 300 and the lifting tool 500 from being inconsistent, and thus the double-drum 300 can smoothly drive the lifting tool 500 to ascend and descend through the two steel wire ropes 400, avoiding the lifting tool 500 from swinging greatly during the ascending and descending process, causing the lifting tool 500 to collide with the sidewall of the foundation pit, thereby causing the double-drum 300 to shake, resulting in damage to the crane, etc.

[0034] In one embodiment, the guide rod 130 is non-rotatably arranged on the first mounting base 110 and the second mounting base 120.

[0035] In another embodiment, along the axial direction of the guide rod 130, the guide groove 131 is an annular groove, and the guide rod 130 is rotatably arranged on the first mounting base 110 and the second mounting base 120.

[0036] The guide rod 130 is rotated so that the friction of the steel wire rope 400 in the guide groove 131 is less than the corresponding friction of the steel wire rope 400 in the guide groove 131 when the guide rod 130 is non-rotatable, thereby reducing the wear of the steel wire rope 400 when the guide rod 130 guides the steel wire rope 400, and effectively prolonging the service life of the steel wire rope 400.

[0037] In an embodiment, the adjusting mechanism 140 is a cylinder or a push rod, and the position of the guide rod 130 relative to the second mounting base 120 is adjusted by controlling the cylinder or the push rod to drive the guide rod 130 to move towards or away from the double drum 300.

[0038] Further, the output end of the push rod or the cylinder is provided with an elastic member, which is used to buffer the guide rod 130 when guiding the steel wire rope 400, so as to reduce the interaction force between the steel wire rope 400 and the guide rod 130, avoid rigid contact between the steel wire rope 400 and the guide rod 130, and affect the service life of the guide rod 130 and the service life of the steel wire rope 400.

[0039] In another embodiment, the adjusting mechanism 140 includes a push column 141 threadedly connected to the second mounting base 120, one end of the push column 141 is connected with the guide rod 130 through the second mounting base 120, and the position of the guide rod 130 relative to the second mounting base 120 is changed by rotating the push column 141.

[0040] Further, the push column 141 is sleeved with a spring 142, one end of the spring 142 abuts against the second mounting base 120, and the other end of the spring 142 abuts against the guide rod 130.

[0041] Specifically, a stopper 143 is further arranged between the spring 142 and the guide rod 130, the stopper 143 is sleeved on the push column 141 and is fixedly connected with the end of the spring 142.

[0042] By arranging the spring 142, the guide rod 130 has a certain elastic buffering effect under the action of the steel wire rope 400 when guiding the steel wire rope 400, which avoids the rigid connection on the push column 141 affecting the service life of the guide rod 130, and increases the abrasion speed of the steel wire rope 400, which affects the service life of the steel wire rope 400.

[0043] It should be noted that in the embodiment, one end of the guide rod 130 rotates along the other end of the guide rod 130, so that the axis of the guide rod 130 and the axis of the double-drum winding machine 300 are not parallel to each other but intersect each other, and the end of the guide rod 130 close to the double-drum winding machine 300 is exactly the part where the rope angle between the steel wire rope 400 and the double-drum winding machine 300 is larger. Since the guide rod 130 is arranged obliquely, when the steel wire rope 400 is gradually wound or released to the middle position of the double-drum winding machine 300, the guide effect of the guide rod 130 on the steel wire rope 400 gradually decreases, that is, the pressing effect of the guide rod 130 on the steel wire rope 400 gradually weakens, and when the steel wire rope 400 is gradually wound or released to the end of the double-drum winding machine 300, the guide effect of the guide rod 130 on the steel wire rope 400 gradually increases, that is, the pressing effect of the guide rod 130 on the steel wire rope 400 gradually increases.

[0044] Further, the depth of the guide groove 131 is not more than the diameter of the steel wire rope 400. Since the diameter of the guide rod 130 is not greater than the diameter of the double-drum winding machine 300, and the steel wire rope 400 is continuously wound on the double-drum winding machine 300, that is, the position of the steel wire rope 400 on the double-drum winding machine 300 always changes continuously, but the position of the steel wire rope 400 in the guide groove 131 of the guide rod 130 does not change continuously, so when the steel wire rope 400 is wound or released by one turn on the double-drum winding machine 300, the steel wire rope 400 will jump to an adjacent guide groove 131 at least in one guide groove 131. Therefore, in order to ensure that the steel wire rope 400 can smoothly jump between adjacent guide grooves 131, the depth of the guide groove 131 is not more than the diameter of the steel wire rope 400.

[0045] Preferably, the depth of the guide groove 131 is half of the diameter of the steel wire rope 400, so as to further improve the efficiency of the steel wire rope 400 jumping between adjacent guide grooves 131, and further reduce the force of the guide groove 131 on the steel wire rope 400 when jumping, thereby prolonging the service life of the steel wire rope 400.

[0046] Further, the first mounting seat 110 includes a first seat 111, a first pin shaft 112, and a first bearing 113. The first seat 111 is arranged on the trolley frame 200, one end of the first pin shaft 112 is rotatably arranged on the first seat 111, and the other end of the first pin shaft 112 is connected to one end of the guide rod 130 through the first bearing 113, so that the guide rod 130 can rotate relative to the first pin shaft 112.

[0047] The second mounting base 120 comprises a second seat 121, a second pin shaft 122 and a second bearing 123, the second seat 121 is arranged on the trolley frame 200, the push column 141 is arranged through the second seat 121 and at least partially extends out of the second seat 121, one end of the second pin shaft 122 is connected to the end of the push column 141 away from the first seat 111, the other end of the second pin shaft 122 is rotatably connected with the other end of the guide rod 130 through the second bearing 123.

[0048] In an embodiment, the first pin shaft 112 and the second pin shaft 122 are an integral structure and are arranged through the shaft center of the guide rod 130.

[0049] Please refer to Figure 5 The application also provides a crane, which comprises the anti-swinging device 100 for winding a multi-layer steel wire rope by a double drum according to any one of the above-mentioned schemes.

[0050] The crane further comprises a bridge (not shown) and a trolley, the trolley is arranged on the bridge and can move on the bridge.

[0051] The trolley comprises a double drum 300, a driving device 600, a trolley frame 200, a lifting tool 500 and two steel wire ropes 400. The double drum 300 and the driving device 600 are arranged on the trolley frame 200, the two steel wire ropes 400 are respectively connected between the lifting tool 500 and the double drum 300, and the driving device 600 is used to drive the double drum 300 to rotate to wind or release the steel wire rope 400 so that the lifting tool 500 realizes lifting.

[0052] Further, the bottom of the trolley frame 200 is provided with two first fixed pulley sets 700 at a certain distance, each first fixed pulley set 700 comprises two coaxially arranged first fixed pulleys.

[0053] The lifting tool 500 comprises a lifting frame 510 and a lifting hook 520, the lifting hook 520 is arranged on the lifting frame 510, the lifting frame 510 is provided with two second fixed pulley sets 800 corresponding to the two first fixed pulley sets 700, and each second fixed pulley set 800 comprises two coaxially arranged second fixed pulleys 810.

[0054] One steel wire rope 400 is wound through one second fixed pulley 810, one first fixed pulley, another second fixed pulley 810 of the same second fixed pulley set 800 and another first fixed pulley of the same first fixed pulley set 700 in sequence after being drawn out from the left section 310 or the right section 320 of the double drum 300, and is connected with the lifting frame 510.

[0055] By setting the first fixed pulley set 700 and the second fixed pulley set 800, each steel wire rope 400 is more uniform in force after passing through the first fixed pulley set 700 and the second fixed pulley set 800, the connection of the lifting appliance 500 is more stable, and the risk of shaking of the lifting appliance 500 in the movement process is effectively reduced.

[0056] Specifically, the interval between the two first fixed pulley sets 700 is consistent with the interval between the two second fixed pulley sets 800, and when the lifting appliance 500 is suspended, one first fixed pulley set 700 is located directly below the other second fixed pulley set 800.

[0057] In one embodiment, the axial direction of the first fixed pulley is parallel to the axial direction of the second fixed pulley 810.

[0058] In another embodiment, the axial direction of the first fixed pulley is perpendicular to the axial direction of the second fixed pulley 810.

[0059] Further, the double winding drum 300 is provided with a rope groove (not shown), wherein the rope grooves of the left section 310 and the right section 320 are symmetrically arranged, and the rope grooves are used to wind the first layer of steel wire ropes 400. Preferably, the depth of the rope groove is half of the diameter of the steel wire rope 400.

[0060] In the specification and claims of the present application, the words "comprise / comprising" and the words "have / having" and their conjugates are used to specify the presence of stated features, numbers, steps or components, but do not exclude the presence or addition of one or more other features, numbers, steps, components or combinations thereof.

[0061] Some features of the present application are described in different embodiments for clarity, but these features can also be combined in a single embodiment. Conversely, some features of the present application are described in a single embodiment for simplicity, but these features can also be described in different embodiments, alone or in any suitable combination.

[0062] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An anti-slip rope device for winding multi-layer steel wire rope on a double-drum, the anti-slip rope device being mounted on a trolley frame and located between the trolley frame and the double-drum, characterized in that... The anti-skip rope device is provided in two sets. One anti-skip rope device corresponds to the left section of the double-drum, and the other anti-skip rope device corresponds to the right section of the double-drum. The anti-skip rope device includes a first mounting base, a second mounting base, and a guide rod. The two ends of the guide rod are respectively provided on the first mounting base and the second mounting base. The outer side of the guide rod is provided with multiple guide grooves. At least one end of the guide rod can move towards the double-drum so that the guide rod can restrict the wire rope located in the guide groove. The double-drum is provided on the upper surface of the trolley frame and is spaced a certain distance from the upper surface of the trolley frame. The two anti-skip rope devices are symmetrically arranged. Along the horizontal direction, one end of the guide rod is rotatably mounted on the first mounting base, and the other end of the guide rod is connected to the second mounting base through an adjustment mechanism. Under the action of the adjustment mechanism, the horizontal distance between the guide rod and the second mounting base is adjusted so that the end of the guide rod corresponding to the second mounting base moves closer to or further away from the double-drum with the first mounting base as the rotation center. The adjustment mechanism includes a push pin threaded onto the second mounting base. One end of the push pin passes through the second mounting base and is connected to the guide rod. The position of the guide rod relative to the second mounting base is changed by rotating the push pin. The second mounting base includes a second seat, a second pin, and a second bearing. The second seat is mounted on the trolley frame. The push rod passes through the second seat and extends at least partially out of the second seat. One end of the second pin is connected to the end of the push rod away from the first mounting base, and the other end of the second pin is rotatably connected to the other end of the guide rod through the second bearing. A spring is fitted onto the push column, with one end of the spring abutting against the second mounting base and the other end of the spring abutting against the guide rod.

2. The anti-skid rope device for double-drum winding of multi-layer steel wire rope according to claim 1, characterized in that... Along the axial direction of the guide rod, the guide rod is rotatably mounted on the first mounting base and the second mounting base, and the guide groove is an annular groove.

3. The anti-skid rope device for double-drum winding of multi-layer steel wire rope according to claim 1, characterized in that... The adjustment mechanism is a cylinder or a push rod.

4. The anti-skid rope device for double-drum winding of multi-layer steel wire rope according to claim 1, characterized in that... A spring is fitted on the push column, one end of the spring abuts against the second mounting base, and the other end of the spring abuts against the guide rod.

5. The anti-skid rope device for double-drum winding of multi-layer steel wire rope according to claim 1, characterized in that... The depth of the guide groove does not exceed the diameter of the wire rope.

6. The anti-skid rope device for double-drum winding of multi-layer steel wire rope according to claim 1, characterized in that... The depth of the guide groove is half the diameter of the wire rope.

7. A crane, the crane comprising the anti-slip rope device for winding multi-layer steel wire rope on a double drum as described in any one of claims 1-6, characterized in that... The crane also includes a bridge frame and a trolley. The trolley is mounted on the bridge frame and includes a double drum, a drive unit, a trolley frame, a lifting device, and two wire ropes. The double drum and the drive unit are both mounted on the trolley frame. The two wire ropes are respectively connected between the lifting device and the double drum. The drive unit is used to drive the double drum to rotate and wind or release the wire ropes so that the lifting device can be raised or lowered.

8. The crane according to claim 7, characterized in that... The bottom of the trolley frame is provided with two first fixed pulley groups at a certain distance. Each first fixed pulley group includes two coaxially arranged first fixed pulleys. The lifting device includes a lifting frame and a hook. The hook is provided on the lifting frame. The lifting frame is provided with two second fixed pulley groups corresponding to the two first fixed pulley groups. Each second fixed pulley group includes two coaxially arranged second fixed pulleys. A wire rope is led out from the left or right section of the double drum and passes sequentially around a second fixed pulley, a first fixed pulley, another second fixed pulley in the same second fixed pulley group, and another first fixed pulley in the same first fixed pulley group before connecting to the lifting frame.

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