Crane trolley rope changing method and crane

Abstract

The present application provides a crane trolley rope changing method and a crane, the method is applied to the wire rope changing process of a trolley with an equalizing pulley, the method comprising the steps of: controlling the crane to switch to a rope changing mode; controlling the trolley drum to rotate until the old wire rope located on one side of the trolley drum can be removed from the trolley drum; connecting the new wire rope with the first end of the removed old wire rope to form a new and old rope joint; connecting the second end of the old wire rope to the hoisting drum or the pitching drum; controlling the hoisting drum or the pitching drum to collect the rope until the new and old rope joint leaves the machine room and enters the machine room again; and disconnecting the new and old rope joint, and fixing the head and end of the new wire rope on the trolley drum. The whole process is simple and quick to operate, and no additional special rope changing equipment is required.

Description

Technical Field

[0001] The present application relates to the technical field of cranes, and in particular to a method for changing ropes of a crane trolley and a crane. Background Art

[0002] At present, the most commonly used rope-changing mechanism for most cranes is an additional drive mechanism to complete the rope changing of the crane. The rope-changing mechanism is used less frequently, and its efficiency is not significantly improved, which will greatly increase the cost of the equipment. In some cranes, a balancing pulley is provided on the trolley, and two steel ropes are led out from both sides of the trolley drum. The steel ropes pass around the balancing pulley. When the trolley drum winds up and unwinds the steel rope, the trolley is driven to move horizontally through the balancing pulley, and the balancing pulley acts as a movable pulley. After working for a long time, the steel wire rope will be damaged to a certain extent. How to replace the steel wire rope of the trolley with a balancing pulley is a technical problem that needs to be solved in this field. Summary of the invention

[0003] In view of this, the present application provides a crane trolley rope changing method and a crane, which can simply and quickly replace the wire rope of a trolley with a balancing pulley without the need for additional special rope changing equipment.

[0004] In the first aspect, the present application provides a crane trolley rope changing method, which is applied to the wire rope replacement process of a trolley with a balancing pulley, and the method includes the steps of: controlling the crane to switch to rope changing mode; controlling the trolley drum to rotate until the old wire rope located on one side of the trolley drum can be removed from the trolley drum; connecting the new wire rope to the first end of the removed old wire rope to form a new and old rope joint; connecting the second end of the old wire rope to the lifting drum or the pitching drum; controlling the lifting drum or the pitching drum to reel in the rope until the new and old rope joint leaves the machine room and enters the machine room again; and disconnecting the new and old rope joint, and fixing the head and tail ends of the new wire rope on the trolley drum.

[0005] When this aspect is used, the new wire rope can be brought into the machine room through the old wire rope. After connecting the new and old wire ropes, the old wire rope is reeled in by the hoisting drum or the pitching drum so that the new wire rope enters the pulley working system, so that the old wire rope is completely removed from the pulley working system and wound on the hoisting drum or the pitching drum. Then the head and the end of the new wire rope are fixed on the trolley drum to complete the rope change. The whole process is simple and quick to operate, and no additional special rope changing equipment is required.

[0006] In combination with the first aspect, in a possible implementation, controlling the crane to switch to the rope-changing mode includes: shutting down the limit function, overspeed control function, and circle number calculation function of the trolley drum, the lifting drum, and the luffing drum.

[0007] In combination with the first aspect, in a possible implementation, before connecting the second end of the old wire rope to the lifting drum or the pitching drum, the method also includes: controlling the lifting drum or the pitching drum to rotate until the wire rope on the lifting drum or the pitching drum can be removed; and fixing the wire rope removed from the lifting drum or the pitching drum in the machine room.

[0008] In combination with the first aspect, in a possible implementation, a first rope-changing hole that can be opened and closed is opened at the bottom of the machine room; the method also includes: opening the first rope-changing hole, and installing a first rope-changing pulley group at the first rope-changing hole; controlling the hook of the maintenance crane in the machine room to pass through the first rope-changing hole and bypass the first rope-changing pulley group; controlling the hook to descend until the head end of the new wire rope can be connected to the hook; and controlling the hook to rise to pull the head end of the new wire rope into the machine room.

[0009] In combination with the first aspect, in a possible implementation, the method also includes: setting a new rope reel with the new steel wire rope rolled up below the first rope-changing hole; and aligning the midpoint of the length direction of the reel of the new rope reel with the geometric center of the first rope-changing hole.

[0010] In combination with the first aspect, in a possible implementation, the trolley and the pulley system driving the trolley are located below the horizontal plane of the bottom of the machine room; wherein, connecting the new wire rope with the first end of the removed old wire rope to form a new and old rope joint includes: setting a first guide pulley so that the horizontal height of the first guide pulley is higher than the horizontal height of the first rope changing pulley group, and higher than the horizontal height of the trolley drum; setting a third guide pulley in the direction of the old rope replacement side of the trolley drum, and making the horizontal height of the third guide pulley lower than the horizontal height of the bottom of the machine room; wherein, the old rope replacement side is the side of the trolley drum facing the old wire rope that needs to be replaced; and connecting the new wire rope and the first end of the old wire rope to each other, and making the connected rope body pass around the first rope changing pulley group, the first guide pulley and the third guide pulley in sequence.

[0011] In combination with the first aspect, in a possible implementation, the trolley and the pulley system driving the trolley are located below the horizontal plane of the bottom of the machine room; connecting the second end of the old wire rope to the lifting drum or the pitching drum includes: setting a second guide pulley so that the horizontal height of the second guide pulley is higher than the horizontal height of the lifting drum or the pitching drum, and higher than the horizontal height of the trolley drum; setting a fourth guide pulley in the direction of the old rope replacement side of the trolley drum, and making the horizontal height of the fourth guide pulley lower than the horizontal height of the bottom of the machine room; wherein the old rope replacement side is the side of the trolley drum facing the old wire rope that needs to be replaced; and connecting the second end of the old wire rope and the lifting drum or the pitching drum to each other, and making the connected rope body pass around the second guide pulley and the fourth guide pulley in turn.

[0012] In combination with the first aspect, in a possible implementation, a second rope-changing hole that can be opened and closed is opened at the bottom of the machine room; the method also includes: opening the second rope-changing hole and installing a second rope-changing pulley group at the second rope-changing hole; passing the old wire rope through the second rope-changing hole and bypassing the second rope-changing pulley group to extend out of the machine room; setting an old rope frame below the second rope-changing hole; controlling the lifting drum or the pitching drum to release the rope to gradually put the old wire rope into the old rope frame; controlling the lifting drum or the pitching drum to release the rope until the old wire rope can be removed and connected to the second end of the old wire rope on the lifting drum or the pitching drum; connecting the removed second end of the old wire rope to the hook of the maintenance crane in the machine room; controlling the hook to pass through the second rope-changing hole and bypass the second rope-changing pulley group; and controlling the hook to descend to put all the old wire rope into the old rope frame.

[0013] In a second aspect, the present application provides a crane, comprising: a crane body, including a tail trolley pulley group and a head trolley pulley group; a trolley, slidably connected to the crane body, the trolley moves between the tail trolley pulley group and the head trolley pulley group, and the trolley is provided with a first balancing pulley group and a second balancing pulley group; a machine room, connected to the crane body; a trolley drum, arranged at the bottom of the machine room; a first steel wire rope, the two ends of the first steel wire rope are respectively fixed to the trolley drum, the first steel wire rope is sequentially passed around the tail trolley pulley group and the first balancing pulley group; and a second steel wire rope, the two ends of the second steel wire rope are respectively fixed to the trolley drum, the second steel wire rope is sequentially passed around the head trolley pulley group and the second balancing pulley group.

[0014] The second aspect is the object to which the method of the first aspect is applied, which will not be elaborated here.

[0015] In combination with the second aspect, in a possible implementation, a first rope-changing hole and a second rope-changing hole are provided at the bottom of the machine room; wherein the crane further comprises: a first rope-changing pulley block, which is detachably connected to the first rope-changing hole; a second rope-changing pulley block, which is detachably connected to the second rope-changing hole; a first guide pulley, which is arranged at a level higher than the level of the first rope-changing pulley block and higher than the level of the trolley drum; a second guide pulley, which is arranged at a level higher than the level of the lifting drum or the pitching drum and higher than the level of the trolley drum The drum is at a horizontal height; a third guide pulley is arranged on the old rope replacement side of the trolley drum, and the horizontal height of the third guide pulley is lower than the horizontal height of the bottom of the machine room; wherein the old rope replacement side is the side of the trolley drum facing the old wire rope that needs to be replaced; a fourth guide pulley is arranged on the old rope replacement side of the trolley drum, and the horizontal height of the fourth guide pulley is lower than the horizontal height of the bottom of the machine room; and a plurality of fixing ear plates are arranged in the machine room, and the fixing ear plates are used to fix the wire rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a schematic diagram of the method steps of a crane trolley rope changing method provided in one embodiment of the present application.

[0017] Figure 2 Shown is a schematic diagram of the method steps of a crane trolley rope changing method provided by another embodiment of the present application.

[0018] Figure 3 Shown is a schematic diagram of the method steps of a crane trolley rope changing method provided by another embodiment of the present application.

[0019] Figure 4 Shown is a schematic diagram of the method steps of a crane trolley rope changing method provided by another embodiment of the present application.

[0020] Figure 5 Shown is a schematic diagram of the method steps of a crane trolley rope changing method provided by another embodiment of the present application.

[0021] Figure 6 Shown is a schematic diagram of the method steps of a crane trolley rope changing method provided by another embodiment of the present application.

[0022] Figure 7 Shown is a schematic diagram of the method steps of a crane trolley rope changing method provided by another embodiment of the present application.

[0023] Figure 8 Shown is a schematic diagram of the method steps of a crane trolley rope changing method provided by another embodiment of the present application.

[0024] Fig. 9 A schematic structural diagram of a crane provided in one embodiment.

[0025] Fig.10 This is a schematic diagram of part of the structure when replacing the first steel wire rope.

[0026] Fig.11 This is a schematic diagram of the partial structure of the trolley with a balancing pulley during normal operation.

[0027] Fig.12 This is a schematic diagram of the partial structure of the trolley with a balancing pulley when replacing the wire rope.

[0028] Fig.13 This is a schematic diagram of part of the structure when replacing the second wire rope.

[0029] Fig.14 Schematic diagram of the partial structure after the second wire rope is replaced.

[0030] Fig.15 Schematic diagram of part of the structure when releasing the old rope. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] Exemplary crane trolley rope changing method

[0033] The present application provides a method for changing the rope of a crane trolley, referring to Figures 10 to 14 , applied to the wire rope replacement process of a trolley with a balancing pulley, in one implementation, such as Figure 1 As shown, the crane trolley rope changing method comprises the steps of:

[0034] Step 101: Control the crane to switch to a rope-changing mode.

[0035] When this step is executed, some limit functions of the crane can be turned off, and the working stroke of some mechanisms of the crane can be increased to facilitate subsequent rope changing work.

[0036] Step 102, control the trolley drum 4 to rotate until the old wire rope located on one side of the trolley drum 4 can be removed from the trolley drum.

[0037] This embodiment is applied to the replacement of the wire rope of a trolley with a balancing pulley. Such a trolley is driven to move in translation by two wire ropes, and the two wire ropes are respectively located on both sides of the trolley drum. Fig.11 and Fig.12 The two steel wire ropes are respectively the first steel wire rope 5 and the second steel wire rope 6. When the trolley drum 4 is wound in a rotation direction, the steel wire rope on one side of the trolley drum 4 is wound, and the steel wire rope on the other side of the trolley drum 4 is released, thereby driving the trolley to move horizontally. Each time the steel wire rope is replaced, only the old steel wire rope on one side of the trolley drum 4 is replaced, and the old steel wire rope on the other side of the trolley drum 4 is replaced after the replacement is completed. In this step, for the old steel wire rope that needs to be replaced this time, the trolley drum 4 is controlled to rotate to release the old steel wire rope that needs to be replaced this time, until the old steel wire rope that needs to be replaced this time can be removed from the trolley drum 4, at this time, only the two connecting ends or several rope pressing circles of the old steel wire rope on the trolley drum are left on the trolley drum 4, and the first end of the old steel wire rope and the second end of the old steel wire rope are respectively the two ends of the old steel wire rope replaced this time.

[0038] Step 103: Pull the new steel wire rope 22 into the machine room.

[0039] In this step, the maintenance crane 70 in the machine room 3 can be controlled to lower the hook 71 of the maintenance crane 70, connect the hook 71 to the new wire rope 22, and then lift the hook 71 of the maintenance crane 70 to pull the new wire rope 22 into the machine room 3.

[0040] Step 104 , connect the new steel wire rope 22 to the first end of the removed old steel wire rope to form a new-old rope joint 23 .

[0041] In this step, the new steel wire rope 22 and the old steel wire rope can be connected together by welding, clamping, bundling, etc.

[0042] Step 105 , connecting the second end of the old steel wire rope to the lifting drum 20 or the pitching drum 21 .

[0043] In this step, since this embodiment is applied to the replacement of the trolley wire rope with the balancing pulley, the trolley drum 4 will simultaneously reel in the two old wire ropes on both sides of the trolley drum 4 when rotating, so this embodiment cannot use the trolley drum 4 to reel in the old wire rope to bring the new wire rope 22 into the balancing pulley system. Instead, it is necessary to use other drums in the machine room 3 to reel in the old wire rope, so as to bring the new wire rope 22 into the balancing pulley system. Before using other drums, the wire ropes on other drums can be removed to empty the drums.

[0044] Step 106 , control the lifting drum 20 or the pitching drum 21 to reel in the rope until the new and old rope joints 23 leave the machine room 3 and re-enter the machine room 3 .

[0045] In this step, when the hoisting drum 20 or the pitching drum 21 drives the second end of the old steel wire rope to reel in the rope, the old steel wire rope continuously brings the new steel wire rope 22 into the balancing pulley system of the trolley through the first end of the old steel wire rope, and when the new and old rope joints 23 enter the machine room 3 again, the balancing pulley system of the trolley is completely replaced with the new steel wire rope. At this time, all the old steel wire ropes are wound on the hoisting drum 20 or the pitching drum 21.

[0046] Step 107 , disconnect the new and old rope joints 23 , and fix the head and tail ends of the new steel wire rope 22 on the trolley drum 4 .

[0047] In this embodiment, since the trolley drum 4 is controlled to roll in step 102, the first end and the second end of the old wire rope can be removed from the trolley drum 4, indicating that the travel of the wire rope between the trolley drum 4 and the trolley balancing pulley is the same as the length of the old wire rope. Since the length of the selected new wire rope 22 is the same as the length of the old wire rope, if the head end of the new wire rope 22 can be fixed on the trolley drum 4, the end of the new wire rope 22 also enters the machine room 3 and can be fixed on the trolley drum 4. Even if the end of the new wire rope 22 does not enter the machine room 3, after the head end of the new wire rope 22 is fixed on the trolley drum 4, the trolley drum 4 is controlled to retract the rope to pull the end of the new wire rope 22 into the machine room 3.

[0048] When it is necessary to replace another old steel wire rope on the other side of the trolley drum 4, repeat steps 102 to 107.

[0049] When this embodiment is used, the new steel wire rope 22 can be brought into the machine room 3 through the old steel wire rope. After the new and old steel wire ropes are connected, the old steel wire rope is wound up by the hoisting drum 20 or the pitching drum 21 so that the new steel wire rope 22 enters the pulley working system, so that the old steel wire rope is completely removed from the pulley working system and wound on the hoisting drum 20 or the pitching drum 21. Then the head end and the tail end of the new steel wire rope 22 are fixed on the trolley drum 4 to complete the rope change. The whole process is simple and quick to operate, and no additional special rope changing equipment is required.

[0050] In one embodiment, if Figure 2 As shown, step 101 includes:

[0051] Step 1011, turn off the limit function, overspeed control function and circle calculation function of the trolley drum, lifting drum and pitching drum.

[0052] In this embodiment, turning off the limit function of each drum can make each drum unwind more turns, thereby exposing the fixing points of the old rope on each drum to remove the old rope. Turning off the overspeed control function of each drum can make each drum unwind at a faster speed, thereby speeding up the rope replacement. Turning off the turn calculation function of each drum can avoid counting the turns generated during the rope replacement process into the statistical data of the crane's working parameters.

[0053] In one embodiment, if Figure 3 As shown, before step 105, the method further includes:

[0054] Step 1041, control the hoisting drum or the pitching drum to rotate until the wire rope on the hoisting drum or the pitching drum can be removed.

[0055] In this step, the hoisting drum or the pitching drum is controlled to release the rope, so that the wire rope on the hoisting drum or the pitching drum is vacated, so as to prepare for the execution of step 105 and subsequent steps.

[0056] Step 1042: Fix the wire rope removed from the lifting drum or the pitching drum in the machine room.

[0057] In this step, the steel wire rope removed from the hoisting drum or the pitching drum is fixed to prevent the steel wire rope from falling off the pulley system corresponding to the hoisting drum or the pitching drum. Specifically, several fixing lugs can be set in the machine room to fix the steel wire rope removed from the hoisting drum or the pitching drum.

[0058] Reference Fig.10 and Fig.12 In one embodiment, a first rope-changing hole 11 that can be opened and closed is provided at the bottom of the machine room.

[0059] like Figure 4 As shown, step 103 includes:

[0060] Step 1031 , open the first rope-changing hole 11 , and install the first rope-changing pulley block 13 at the first rope-changing hole 11 .

[0061] Step 1032 , control the hook 71 of the maintenance crane 70 in the machine room 3 to pass through the first rope-changing hole 11 and bypass the first rope-changing pulley block 13 .

[0062] Step 1033 , control the hook 71 to descend until the head end of the new steel wire rope 22 can be connected to the hook 71 .

[0063] Step 1034 , control the hook 71 to rise to pull the head end of the new steel wire rope 22 into the machine room 3 .

[0064] In this embodiment, the first rope-changing hole 11 can be used to facilitate pulling the head end of the new steel wire rope 22 into the machine room 3. The first rope-changing pulley block 13 can make the new steel wire rope 22 smoother in the process of entering the machine room 3, and will not cause friction and damage to the new steel wire rope 22 and the first rope-changing hole 11. When the rope does not need to be changed, the first rope-changing hole 11 can be closed without affecting the normal operation of the machine room 3.

[0065] Reference Fig.12 In one embodiment, if Figure 5 As shown, step 103 also includes:

[0066] Step 1035 , dispose the new rope drum 24 with the new steel wire rope 22 wound on it below the first rope-changing hole 11 .

[0067] Step 1036 , align the midpoint of the length direction of the reel of the new rope reel 24 with the geometric center of the first rope-changing hole 11 .

[0068] In this embodiment, the new rope drum 24 located below the first rope-changing hole 11 allows the new steel wire rope 22 to vertically pass through the first rope-changing hole 11 into the machine room, reducing the space occupancy rate of the new steel wire rope 22 during its travel. In addition, the new rope drum 24 and the first rope-changing hole 11 aligned with each other can only generate an upward pulling force on the new rope drum 22 during the process of the new steel wire rope 22 entering the first rope-changing hole 11, and will not cause the new rope drum 22 to move sideways or have a tendency to move sideways, that is, after being aligned with each other, the new rope drum 22 can be more stable when releasing the rope.

[0069] Reference Fig.10 and Fig.12 As shown, in one embodiment, the trolley 2 and the pulley system driving the trolley 2 are both located below the horizontal plane of the bottom of the machine room 3. That is, two old steel wire ropes respectively drawn from both sides of the trolley drum 4 extend to the pulley system below the machine room 3 to drive the trolley 2 located below the machine room 3 to move horizontally.

[0070] like Figure 6 As shown, step 104 includes:

[0071] Step 1043, setting the first guide pulley 15 so that the horizontal height of the first guide pulley 15 is higher than the horizontal height of the first rope-changing pulley group 13 and higher than the horizontal height of the trolley drum 4.

[0072] In this step, the level of the lowest edge of the first guide pulley 15 is higher than the level of the highest edge of the first rope-changing pulley group 13; the level of the lowest edge of the first guide pulley 15 is also higher than the level of the highest edge of the trolley drum 4.

[0073] Step 1044 , a third guide pulley 17 is arranged on the old rope replacement side of the trolley drum 4 , and the level of the third guide pulley 17 is made lower than the level of the bottom of the machine room 3 .

[0074] In this step, the old rope replacement side is the side of the trolley drum 4 facing the old wire rope to be replaced. For example, when the crane of this embodiment is a port crane, when the old wire rope on the land side of the trolley needs to be replaced, the third guide pulley 17 is set on the land side of the trolley drum 4; when the old wire rope on the sea side of the trolley needs to be replaced, the third guide pulley 17 is set on the sea side of the trolley drum 4.

[0075] Step 1045, connect the new steel wire rope 22 and the first end of the old steel wire rope to each other, and make the connected rope body pass through the first rope changing pulley group 13, the first guide pulley 15 and the third guide pulley 17 in sequence.

[0076] In this embodiment, since the first rope-changing hole 11 is located at the bottom of the machine room 3, and the pulley system of the driving trolley 2 is located below the machine room 3. If the new steel wire rope 22 passes through the first rope-changing hole 11 and is directly connected to the old steel wire rope and enters the pulley system of the trolley 2, friction interference will occur with many structures. The first guide pulley 15 allows the new steel wire rope 22 to extend upward after entering the machine room 3. The third guide pulley 17 located below the machine room 3 makes the turning point of the new steel wire rope 22 at the third guide pulley 17 located below the machine room 3, so that the new steel wire rope 22 extends downward after passing through the first guide pulley 15 and bypasses the third guide pulley 17, and then enters the steel wire rope pulley system of the trolley 2 without interference. In this embodiment, the first guide pulley 15 and the third guide pulley 17 are used to improve the routing flexibility of the new steel wire rope 22 in the machine room 3, avoid wear of the new steel wire rope 22, and avoid wear of some mechanisms in the machine room 3.

[0077] Reference Fig.10 and Fig.12 As shown, in one embodiment, the trolley 2 and the pulley system driving the trolley 2 are both located below the horizontal plane of the bottom of the machine room 3. That is, two old steel wire ropes respectively drawn from both sides of the trolley drum 4 extend to the pulley system below the machine room 3 to drive the trolley 2 located below the machine room 3 to move horizontally.

[0078] like Figure 7 As shown, step 105 includes:

[0079] Step 1051, setting the second guide pulley 16 so that the horizontal height of the second guide pulley 16 is higher than the horizontal height of the lifting drum 20 or the pitching drum 21, and higher than the horizontal height of the trolley drum 4.

[0080] In this step, the level of the lowest edge of the second guide pulley 16 is higher than the level of the highest edge of the lifting drum 20 or the pitching drum 21; the level of the lowest edge of the second guide pulley 16 is also higher than the level of the highest edge of the trolley drum 4.

[0081] Step 1052 , a fourth guide pulley 18 is arranged on the old rope replacement side of the trolley drum 4 , and the level of the fourth guide pulley 18 is made lower than the level of the bottom of the machine room 3 .

[0082] In this step, the old rope replacement side is the side of the trolley drum 4 facing the old wire rope to be replaced. For example, when the crane of this embodiment is a port crane, when the old wire rope on the land side of the trolley needs to be replaced, the fourth guide pulley 18 is set on the land side of the trolley drum 4; when the old wire rope on the sea side of the trolley needs to be replaced, the fourth guide pulley 18 is set on the sea side of the trolley drum 4.

[0083] Step 1053, connect the second end of the old steel wire rope and the lifting drum 20 or the pitching drum 21 to each other, and make the connected rope body pass around the second guide pulley 16 and the fourth guide pulley 18 in sequence.

[0084] In this embodiment, the pulley system of the driving trolley 2 is located below the machine room 3. If the lifting drum 20 or the pitching drum 21 directly reels the old steel wire rope, the old steel wire rope may cause friction interference with many structures. The fourth guide pulley 18 located below the machine room 3 cooperates with the second guide pulley 16 located above, so that the old steel wire rope is led out of the pulley system of the trolley 2 and extends upward, bypasses the second guide pulley 16 and then extends downward to the lifting drum 20 or the pitching drum 21, thereby reeling the old steel wire rope without interference. This embodiment improves the routing flexibility of the old steel wire rope in the machine room 3 through the second guide pulley 16 and the fourth guide pulley 18, avoids wear of the old steel wire rope and avoids wear of some mechanisms in the machine room 3.

[0085] Reference Fig.12 and Fig.15 In one embodiment, a second rope-changing hole 12 that can be opened and closed is provided at the bottom of the machine room 3 .

[0086] like Figure 8 As shown, the crane trolley rope changing method also includes an old rope releasing process, and the old rope releasing process includes the steps of:

[0087] Step 1081, open the second rope-changing hole 12, and install the second rope-changing pulley block 14 at the second rope-changing hole 12.

[0088] Step 1082, pass the old steel wire rope through the second rope-changing hole 12 and bypass the second rope-changing pulley block 14 to extend out of the machine room.

[0089] Step 1083 , an old rope frame 25 is arranged below the second rope-changing hole 12 .

[0090] Step 1084 , control the lifting drum 20 or the pitching drum to release the rope so as to gradually put the old steel wire rope into the old rope frame 25 .

[0091] Step 1085, control the hoisting drum 20 or the pitching drum to release the rope until the second end of the old steel wire rope connected to the hoisting drum 20 or the pitching drum can be removed.

[0092] Step 1086: Connect the second end of the removed old wire rope to the hook of the maintenance crane in the machine room 3.

[0093] Step 1087, control the hook to pass through the second rope-changing hole 12 and bypass the second rope-changing pulley block 14.

[0094] Step 1088, control the hook to descend to put all the old steel wire ropes into the old rope frame 25.

[0095] In this embodiment, the second rope-changing hole 12 can be used to facilitate the release of the old steel wire rope from the machine room. When the hoisting drum 20 or the pitching drum releases the rope, the old steel wire rope gradually falls under the action of gravity. The second rope-changing pulley block 14 can make the old steel wire rope smoother in the process of releasing the rope from the machine room, and will not cause friction and damage to the old steel wire rope and the second rope-changing hole 12. When the rope does not need to be replaced, the second rope-changing hole 12 can be closed without affecting the normal operation of the machine room.

[0096] Example crane

[0097] The present application also provides a crane. Fig. 9 A schematic structural diagram of a crane provided in one embodiment. Fig.10 This is a schematic diagram of part of the structure when replacing the first steel wire rope. Fig.11 This is a partial structural diagram of the trolley with a balancing pulley in normal operation. Fig. 9 , Fig.10 as well as Fig.11 As shown, the crane includes: a crane body 1, a trolley 2, a machine room 3, a trolley drum 4, a first steel wire rope 5 and a second steel wire rope 6.

[0098] The crane body 1 includes a tail trolley pulley block 7 and a head trolley pulley block 8. The trolley 2 is slidably connected to the crane body 1, and the trolley 2 moves between the tail trolley pulley block 7 and the head trolley pulley block 8. The trolley 2 is provided with a first balancing pulley block 9 and a second balancing pulley block 10. The machine room 3 is connected to the crane body 1. The trolley drum 4 is arranged at the bottom of the machine room 3. The two ends of the first steel wire rope 5 are respectively fixed to the trolley drum 4, and the first steel wire rope 5 is passed around the tail trolley pulley block 7 and the first balancing pulley block 9 in turn. The two ends of the second steel wire rope 6 are respectively fixed to the trolley drum 4, and the second steel wire rope 6 is passed around the head trolley pulley block 8 and the second balancing pulley block 10 in turn.

[0099] Fig.12 The following is a schematic diagram of the partial structure of the trolley with a balancing pulley when replacing the wire rope. Fig.10 and Fig.12 As shown, a first rope-changing hole 11 and a second rope-changing hole 12 are provided at the bottom of the machine room 3. The crane further comprises: a first rope-changing pulley block 13, a second rope-changing pulley block 14, a first guide pulley 15, a second guide pulley 16, a third guide pulley 17, a fourth guide pulley 18 and a plurality of fixing lugs 19.

[0100] The first rope-changing pulley block 13 is detachably connected to the first rope-changing hole 11, and the second rope-changing pulley block 14 is detachably connected to the second rope-changing hole 12. The first guide pulley 15 is arranged at a position whose horizontal height is higher than the horizontal height of the first rope-changing pulley block 13 and higher than the horizontal height of the trolley drum 4.

[0101] The second guide pulley 16 is arranged at a position whose horizontal height is higher than the horizontal height of the lifting drum 20 or the pitching drum 21 , and higher than the horizontal height of the trolley drum 4 .

[0102] The third guide pulley 17 is arranged on the old rope replacement side of the trolley drum 4, and the level of the third guide pulley 17 is lower than the level of the bottom of the machine room 3. The old rope replacement side is the side of the trolley drum 4 facing the old wire rope that needs to be replaced.

[0103] The fourth guide pulley 18 is arranged on the old rope replacement side of the trolley drum 4, and the horizontal height of the fourth guide pulley 18 is lower than the horizontal height of the bottom of the machine room 3.

[0104] A plurality of fixing lug plates 19 are provided in the machine room 3 , and the fixing lug plates 19 are used to fix the steel wire ropes.

[0105] Fig.11It is a partial structural schematic diagram of the trolley with a balancing pulley in normal operation. When the trolley drum 4 reels the first steel wire rope 5, the second steel wire rope 6 increases, and the trolley 2 moves toward the rear trolley pulley block 7. When the trolley drum 4 reels the second steel wire rope 6, the first steel wire rope 5 increases, and the trolley 2 moves toward the head trolley pulley block 8.

[0106] Fig.12 The following is a schematic diagram of the partial structure of the trolley with a balancing pulley when replacing the wire rope. Fig.10 and Fig.12 As shown, after the new steel wire rope 22 is led out from the new rope drum 24, one end of the new steel wire rope 22 passes through the first rope-changing hole 11 and bypasses the first rope-changing pulley block 13, then enters the machine room 3 and connects with the first steel wire rope 5 to form a new-old rope joint 23. After the new steel wire rope 22 is connected to one end of the first steel wire rope 5, the rope body bypasses the first rope-changing pulley block 13, the first guide pulley 15, the third guide pulley 17, the tail trolley pulley block 7, the first balancing pulley block 9, the fourth guide pulley 18 and the second guide pulley 16 in sequence, and the other end of the first steel wire rope 5 is fixed on the lifting drum 20. Fig.12 In the process, what is replaced is the first steel wire rope 5 from the trolley drum 4 toward the tail trolley pulley block 7.

[0107] Fig.13 It is a partial structural schematic diagram when replacing the second steel wire rope. When the second steel wire rope 6 of the trolley drum 4 facing the head trolley pulley block 8 needs to be replaced, the third guide pulley 17 and the fourth guide pulley 18 are arranged on the side of the trolley drum 4 facing the second steel wire rope 6.

[0108] Fig.14 This is a partial structural diagram of the replacement of the second steel wire rope. The new and old rope joint 23 passes through the third guide pulley 17, the tail trolley pulley block 7, the first balancing pulley block 9 and the fourth guide pulley 18, and the new steel wire rope 22 is brought into the pulley system. At this time, the new and old rope joint 23 can be disassembled and the head and tail ends of the new steel wire rope 22 can be fixed on the trolley drum 4.

[0109] Fig.15 After all the new steel wire ropes 22 are brought into the pulley system, the first steel wire ropes 5 that are basically replaced are wound on the hoisting drum 20, and after the first steel wire ropes 5 pass around the second guide pulley 16, they pass through the second rope-changing hole 12 and the second rope-changing pulley block 14 and then pass out of the machine room, and the hoisting drum 20 continues to release the rope so that the first steel wire ropes 5 gradually fall into the old rope frame 25.

[0110] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0111] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0112] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0113] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features of the present invention.

[0114] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A crane trolley rope changing method, characterized in that: The method is applied to the wire rope replacement process of a trolley with a balancing pulley, and comprises the steps of: Control the crane to switch to rope changing mode; Controlling the trolley drum to rotate until the old steel wire rope located on one side of the trolley drum can be removed from the trolley drum; Connecting the new steel wire rope to the first end of the removed old steel wire rope to form a new-old rope joint; Connect the second end of the old wire rope to the hoisting drum or the pitching drum; Controlling the hoisting drum or the pitching drum to reel in the rope until the new and old rope joints leave the machine room and reenter the machine room; and Disconnect the new and old rope joints, and fix the head and tail ends of the new steel wire rope on the trolley drum; A first rope-changing hole that can be opened and closed is provided at the bottom of the machine room; The method further comprises: Open the first rope-changing hole, and install a first rope-changing pulley block at the first rope-changing hole; Control the hook of the maintenance crane in the machine room to pass through the first rope-changing hole and bypass the first rope-changing pulley block; Controlling the hook to descend until the head end of the new wire rope can be connected to the hook; and The hook is controlled to rise so as to pull the head end of the new steel wire rope into the machine room.

2. A crane trolley rope changing method according to claim 1, characterized in that: The controlling the crane to switch to the rope changing mode comprises: Turn off the limit function, overspeed control function and circle calculation function of the trolley drum, lifting drum and pitching drum.

3. The crane trolley rope changing method according to claim 1, characterized in that: Before connecting the second end of the old steel wire rope to the hoisting drum or the pitching drum, the method further comprises: Controlling the hoisting drum or the pitching drum to rotate until the wire rope on the hoisting drum or the pitching drum can be removed; and The steel wire rope removed from the hoisting drum or the pitching drum is fixed in the machine room.

4. The crane trolley rope changing method according to claim 1, characterized in that: The method further comprises: placing a new rope drum with the new steel wire rope wound on it below the first rope-changing hole; and Align the midpoint of the length direction of the reel of the new rope reel with the geometric center of the first rope-changing hole.

5. The crane trolley rope changing method according to claim 1, characterized in that: The trolley and the pulley system driving the trolley are located below the horizontal plane of the bottom of the machine room; Wherein, the step of connecting the new steel wire rope with the first end of the removed old steel wire rope to form a new-old rope joint comprises: Arrange a first guide pulley so that the level of the first guide pulley is higher than the level of the first rope-changing pulley block and higher than the level of the trolley drum; A third guide pulley is arranged on the side of the trolley drum facing the old wire rope to be replaced, and the level of the third guide pulley is lower than the level of the bottom of the machine room; wherein the old wire rope replacement side is the side of the trolley drum facing the old wire rope to be replaced; and The first ends of the new steel wire rope and the old steel wire rope are connected to each other, and the connected rope bodies are passed around the first rope-changing pulley block, the first guide pulley and the third guide pulley in sequence.

6. The crane trolley rope changing method according to claim 1, characterized in that: The trolley and the pulley system driving the trolley are located below the horizontal plane of the bottom of the machine room; The step of connecting the second end of the old steel wire rope to the hoisting drum or the pitching drum comprises: A second guide pulley is arranged so that the horizontal height of the second guide pulley is higher than the horizontal height of the lifting drum or the pitching drum, and higher than the horizontal height of the trolley drum; A fourth guide pulley is arranged on the side of the trolley drum facing the old wire rope to be replaced, and the level of the fourth guide pulley is lower than the level of the bottom of the machine room; wherein the old wire rope replacement side is the side of the trolley drum facing the old wire rope to be replaced; and The second end of the old steel wire rope and the lifting drum or the pitching drum are connected to each other, and the connected rope body is made to pass around the second guide pulley and the fourth guide pulley in sequence.

7. The crane trolley rope changing method according to claim 1, characterized in that: A second rope-changing hole that can be opened and closed is provided at the bottom of the machine room; The method further comprises: Open the second rope-changing hole, and install a second rope-changing pulley block at the second rope-changing hole; Pass the old steel wire rope through the second rope-changing hole and bypass the second rope-changing pulley block to extend out of the machine room; An old rope frame is arranged below the second rope-changing hole; Controlling the hoisting drum or the pitching drum to release the rope, so as to gradually put the old steel wire rope into the old rope frame; Controlling the hoisting drum or the pitching drum to release the rope until the second end of the old steel wire rope connected to the hoisting drum or the pitching drum can be removed; Connecting the second end of the removed old steel wire rope to the hook of the maintenance crane in the machine room; Controlling the hook to pass through the second rope-changing hole and bypass the second rope-changing pulley block; and The hook is controlled to descend so that all the old steel wire ropes are placed in the old rope frame.

8. A crane, characterized in that: include: The crane body includes a tail trolley pulley block and a head trolley pulley block; A trolley, slidably connected to the crane body, the trolley moves between the tail trolley pulley block and the head trolley pulley block, and the trolley is provided with a first balancing pulley block and a second balancing pulley block; A machine room connected to the crane body; A trolley reel is arranged at the bottom of the machine room; A first steel wire rope, both ends of which are respectively fixed to the trolley drum, and the first steel wire rope is passed around the tail trolley pulley block and the first balancing pulley block in sequence; as well as A second steel wire rope, both ends of which are respectively fixed on the trolley drum, and the second steel wire rope is passed around the head trolley pulley block and the second balancing pulley block in sequence.

9. The crane according to claim 8, characterized in that The bottom of the machine room is provided with a first rope-changing hole and a second rope-changing hole; Wherein, the crane further comprises: A first rope-changing pulley block, detachably connected to the first rope-changing hole; A second rope-changing pulley block is detachably connected to the second rope-changing hole; A first guide pulley is arranged at a position whose horizontal height is higher than the horizontal height of the first rope-changing pulley block and higher than the horizontal height of the trolley drum; A second guide pulley is arranged at a position whose horizontal height is higher than the horizontal height of the lifting drum or the pitching drum, and higher than the horizontal height of the trolley drum; A third guide pulley is arranged on the side of the trolley drum facing the old rope replacement side, and the level of the third guide pulley is lower than the level of the bottom of the machine room; wherein the old rope replacement side is the side of the trolley drum facing the old steel wire rope that needs to be replaced; a fourth guide pulley, which is arranged on the old rope replacement side of the trolley drum, and whose level is lower than that of the bottom of the machine room; and A plurality of fixing lug plates are arranged in the machine room, and the fixing lug plates are used to fix the steel wire ropes.

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