Crane trolley rope changing method and crane

Abstract

The present application provides a crane trolley rope changing method and a crane. When the crane trolley rope changing method is used, the first new steel wire rope and the second new steel wire rope can be brought into the machine room through the first old steel wire rope and the second old steel wire rope, and the first old steel wire rope and the second old steel wire rope are reeled in after the new and old steel wire ropes are connected so that the first new steel wire rope and the second new steel wire rope enter the pulley working system, so that the first old steel wire rope and the second old steel wire rope are completely removed from the pulley working system and wound on the trolley drum. Then the first new steel wire rope and the second new steel wire rope are completely rolled into the machine room and fixed on the trolley drum to complete the rope changing. 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, there is no balancing pulley on the trolley, and the wire rope is led out from both sides of the trolley drum. The wire rope passes around the head and tail pulleys on the crane. A wire rope clamp is set on the trolley, and the wire rope clamp clamps the wire rope. When the trolley drum winds up the wire rope, it drives the trolley to move horizontally. After working for a long time, the wire rope will be damaged to a certain extent. How to replace the wire rope of a trolley without 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 replace the wire rope of a trolley without a balancing pulley, and the whole process is simple and fast.

[0004] In the first aspect, the present application provides a crane trolley rope changing method, which is applied to the crane trolley wire rope changing process without a balancing pulley, and the method comprises the steps of: controlling the trolley drum to rotate until the first old wire rope and the second old wire rope located on the first side of the trolley drum can be removed from the trolley drum; connecting the first new rope head end of the first new wire rope and the second new rope head end of the second new wire rope to the removed first old rope head end and the second old rope head end, respectively, to form a first new-old rope joint and a second new-old rope joint; controlling the trolley drum to reel in the first old wire rope and the second old wire rope on the second side until the first new-old rope joint and the second new-old rope joint leave the machine room and enter the machine room again; wherein the second side and the first side are the opposite sides of the trolley drum respectively; controlling the trolley drum to reel in the first new wire rope and the second new wire rope until the first new rope end of the first new wire rope and the second new rope end of the second new wire rope enter the machine room; and fixing the first new rope end and the second new rope end on the trolley drum.

[0005] When the present invention is used, the first new steel wire rope and the second new steel wire rope can be brought into the machine room through the first old steel wire rope and the second old steel wire rope, and the first old steel wire rope and the second old steel wire rope can be reeled in after the new and old steel wire ropes are connected so that the first new steel wire rope and the second new steel wire rope enter the pulley working system, so that the first old steel wire rope and the second old steel wire rope are completely removed from the pulley working system and wound on the trolley drum. Then the first new steel wire rope and the second new steel wire rope are completely rolled into the machine room and 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, the method further includes: turning off the limit function, overspeed control function and lap calculation function of the trolley drum.

[0007] 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 first end of the new rope can be connected to the hook; and controlling the hook to rise to pull the first end of the new rope into the machine room.

[0008] In combination with the first aspect, in a possible implementation, the method also includes: disposing a first new rope reel wound with the first new steel wire rope below the first rope changing hole; and aligning the midpoint position of the length direction of the reel of the first new rope reel with the plumb line where the geometric center of the first rope changing hole is located.

[0009] 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, the first new rope head end of the first new steel wire rope and the second new rope head end of the second new steel wire rope are respectively connected to the removed first old rope head end and the second old rope head end to form the first new and old rope joints and the second new and old rope joints, including: setting a first guide pulley, and making the horizontal height of the first guide pulley higher than the horizontal height of the first rope changing pulley group and the horizontal height of the trolley drum; setting a third guide pulley, and making the horizontal height of the third guide pulley lower than the horizontal height of the bottom of the machine room; and connecting the first new rope head end and the first old rope head end 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.

[0010] 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; controlling the hook of the maintenance crane in the machine room to pass through the second rope-changing hole and bypass the second rope-changing pulley group; controlling the hook to descend until the head end of the second new rope can be connected to the hook; and controlling the hook to rise to pull the head end of the second new rope into the machine room.

[0011] In combination with the first aspect, in a possible implementation, the method also includes: disposing a second new rope reel wound with the second new steel wire rope below the second rope changing hole; and aligning the midpoint position of the length direction of the reel of the second new rope reel with the plumb line where the geometric center of the second rope changing hole is located.

[0012] 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; the first new rope head end of the first new steel wire rope and the second new rope head end of the second new steel wire rope are respectively connected to the removed first old rope head end and the second old rope head end to form the first new and old rope joints and the second new and old rope joints, including: setting a second guide pulley, and making the horizontal height of the second guide pulley higher than the horizontal height of the second rope changing pulley group and the horizontal height of the trolley drum; setting a fourth guide pulley, and making the horizontal height of the fourth guide pulley lower than the horizontal height of the bottom of the machine room; and connecting the second new rope head end and the second old rope head end to each other, and making the connected rope body pass around the second rope changing pulley group, the second guide pulley and the fourth guide pulley in sequence.

[0013] In combination with the first aspect, in a possible implementation, a switchable old rope release hole is provided at the bottom of the machine room; the method also includes: opening the old rope release hole and installing an old rope release pulley block at the old rope release hole; passing the first old steel wire rope and the second old steel wire rope through the old rope release hole, bypassing the old rope release pulley block and then extending out of the machine room; arranging an old rope frame below the old rope release hole; controlling the trolley drum to release the rope so as to gradually put the first old steel wire rope and the second old steel wire rope into the old rope frame; controlling the trolley drum to release the rope until the first old rope end and the second old rope end connected to the trolley drum by the first old steel wire rope and the second old steel wire rope can be removed; connecting the removed first old rope end or the second old rope end to the hook of the maintenance crane in the machine room; controlling the hook to pass through the old rope release hole and bypass the old rope release pulley block; and controlling the hook to descend to put the first old rope end or the second old rope end into the old rope frame.

[0014] In a second aspect, the present application provides a crane, comprising: a crane body, comprising 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; a machine room, connected to the crane body; a trolley drum, arranged at the bottom of the machine room; a first old steel wire rope, a first old rope head end of the first old steel wire rope is fixed to the trolley drum, and a first old rope end of the first old steel wire rope is fixed to the trolley drum after passing through the tail trolley pulley block and the head trolley pulley block in sequence; and a second old steel wire rope, a second old rope head end of the second old steel wire rope is fixed to the trolley drum, and a second old rope end of the second old steel wire rope is fixed to the trolley drum after passing through the tail trolley pulley block and the head trolley pulley block in sequence; wherein, a clamp assembly is provided on the trolley, and the clamp assembly is used to clamp the first old steel wire rope and the second old steel wire rope.

[0015] The second aspect is the application object of the first aspect and will not be elaborated here.

[0016] 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 includes: a first rope-changing pulley group, detachably connected to the first rope-changing hole; a second rope-changing pulley group, detachably connected to the second rope-changing hole; a first guide pulley, arranged at a horizontal height higher than the horizontal height of the first rope-changing pulley group and higher than the horizontal height of the trolley drum; a second guide pulley, arranged at a horizontal height higher than the horizontal height of the second rope-changing pulley group and higher than the horizontal height of the trolley drum; a third guide pulley, arranged at a horizontal height position lower than the bottom of the machine room; a fourth guide pulley, arranged at a horizontal height position lower than the bottom of the machine room; and a plurality of fixed ear plates, arranged in the machine room, the fixed ear plates being used to fix the wire rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] 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.

[0019] 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.

[0020] Figure 4Shown 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 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] Fig. 9 Shown is a schematic diagram of the method steps of a crane trolley rope changing method provided by another embodiment of the present application.

[0026] Fig.10 Shown is a structural schematic diagram of a crane provided in one embodiment of the present application.

[0027] Fig.11 Shown is a partial structural schematic diagram of a crane trolley provided by an embodiment of the present application during normal operation.

[0028] Fig.12 Shown is a partial structural schematic diagram of a crane trolley provided by an embodiment of the present application when replacing a wire rope.

[0029] Fig.13 Shown is a partial structural schematic diagram of a crane trolley provided by an embodiment of the present application when replacing a wire rope.

[0030] Fig.14 Shown is a partial structural schematic diagram of a crane trolley provided by an embodiment of the present application when replacing a wire 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 crane trolley rope changing method, which is applied to the process of replacing the steel wire rope of a crane trolley without a balancing pulley. Figure 1 FIG. 1 is a schematic diagram of the steps of a crane trolley rope changing method provided by an embodiment of the present application. Fig.11 , Fig.12 , Fig.13 as well as Fig.14 As shown, in one embodiment, 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, controlling the trolley drum 4 to rotate until the first old steel wire rope 5 and the second old steel wire rope 6 located on the first side of the trolley drum 4 can be removed from the trolley drum.

[0037] In this step, the trolley drum 4 is controlled to rotate until only a few rope compression loops are left on the trolley drum 4, so that the first old rope head end and the second old rope head end fixed on the trolley drum 4 can be removed, and the first old rope end and the second old rope end remain fixed on the trolley drum 4, so that the first new steel wire rope 5 and the second new steel wire rope 6 can be pulled into the machine room 3.

[0038] Step 103 , pull the first new rope head end of the first new steel wire rope 19 and the second new rope head end of the second new steel wire rope 20 into the machine room 3 .

[0039] In this step, the maintenance crane 70 in the machine room 3 can be controlled, the hook 71 of the maintenance crane 70 can be lowered, the hook can be connected to the first new steel wire rope 19 and / or the second new steel wire rope 20, and then the hook 71 of the maintenance crane 70 can be lifted to pull the first new steel wire rope 19 and the second new steel wire rope 20 into the machine room 3.

[0040] Step 104, connect the first new rope head end of the first new steel wire rope and the second new rope head end of the second new steel wire rope to the removed first old rope head end and second old rope head end respectively to form a first new-old rope joint 21 and a second new-old rope joint 22.

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

[0042] Step 105 , control the clamp assembly 9 on the trolley 2 to switch to a released state.

[0043] The present application is applied to a trolley 2 without a balancing pulley, and the wire rope is connected to the trolley 2 through a clamp assembly 9, which is used to clamp the first old wire rope 5 and the second old wire rope 6, so that the wire rope can drive the trolley 2 to perform translational movement.

[0044] Step 106, control the trolley drum 4 to reel in the first old steel wire rope 5 and the second old steel wire rope 6 on the second side until the first new-old rope joint 21 and the second new-old rope joint 22 leave the machine room 3 and re-enter the machine room 3.

[0045] In this step, the second side and the first side are the opposite sides of the trolley drum 4. The first old-new rope joint 21 and the second old-new rope joint 22 leave the machine room 3 and enter the pulley working system, thereby gradually bringing the first new steel wire rope 19 and the second new steel wire rope 20 into the pulley working system. When the first old-new rope joint 21 and the second old-new rope joint 22 enter the machine room 3 again, all the steel wire ropes in the pulley working system are replaced by the first new steel wire rope 19 and the second new steel wire rope 20, and the first old steel wire rope 21 and the second old steel wire rope 22 are basically all wound on the trolley drum 4.

[0046] Step 107, disconnect the first old-new rope joint 21 and the second old-new rope joint 22, and fix the disconnected first new rope head end and the second new rope head end.

[0047] In this step, the new steel wire rope and the old steel wire rope connected to each other are disconnected, and the disconnected first new rope head end and the second new rope head end are fixed to prevent the first new steel wire rope 19 and the second new steel wire rope 20 from escaping from the machine room 3 or even from the pulley working system. In this step, a fixing ear plate 18 can be used to fix the disconnected first new rope head end and the second new rope head end.

[0048] Step 109 , fix the first and second new rope head ends on the trolley drum 4 .

[0049] Step 110 , control the trolley drum 4 to reel in the first new steel wire rope 19 and the second new steel wire rope 20 until the first new rope end of the first new steel wire rope 19 and the second new rope end of the second new steel wire rope 20 enter the machine room 3 .

[0050] Step 111 , fix the first new rope end and the second new rope end on the trolley drum 4 .

[0051] In this step, the rope changing work is completed by connecting the first new rope end and the second new rope end to the trolley drum 4. Subsequently, the clamp assembly 9 on the trolley 2 can be controlled to switch to a clamping state, and the tightness of the first new steel wire rope 19 and the second new steel wire rope 20 can also be adjusted.

[0052] When this embodiment is in use, the first new steel wire rope 19 and the second new steel wire rope 20 can be brought into the machine room 3 through the first old steel wire rope 5 and the second old steel wire rope 6, and the first old steel wire rope 5 and the second old steel wire rope 6 are wound up after the new and old steel wire ropes are connected so that the first new steel wire rope 19 and the second new steel wire rope 20 enter the pulley working system, so that the first old steel wire rope 5 and the second old steel wire rope 6 are completely released from the pulley working system and wound on the trolley drum 4. Then the trolley drum 4 is controlled to release the rope to release the first old steel wire rope 5 and the second old steel wire rope 6, and then the first new steel wire rope 19 and the second new steel wire rope 20 are completely wound into the machine room 3 and 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.

[0053] Figure 2 FIG. 1 is a schematic diagram of the steps of a crane trolley rope changing method provided by another embodiment of the present application. Figure 2 As shown, step 101 includes:

[0054] Step 1011, turn off the limit function, overspeed control function and circle number calculation function of the trolley drum.

[0055] In this embodiment, turning off the limit function of the trolley drum can make the trolley drum unwind more turns, thereby exposing the fixing point of the old wire rope on the trolley drum, so as to facilitate the removal of the old wire rope. Turning off the overspeed control function of the trolley drum can make the trolley drum unwind at a faster speed, thereby speeding up the rope replacement. Turning off the number of turns calculation function of the trolley drum can avoid counting the number of turns generated during the rope replacement process into the statistical data of the crane's working parameters.

[0056] Figure 3 FIG. 1 is a schematic diagram of the steps of a crane trolley rope changing method provided by another embodiment of the present application. Fig.12 and Fig.13 As shown, in one embodiment, a first rope-changing hole 10 that can be opened and closed is provided at the bottom of the machine room 3 .

[0057] like Figure 3 As shown, step 103 includes:

[0058] Step 1031 , open the first rope-changing hole 10 , and install the first rope-changing pulley block 14 at the first rope-changing hole 10 .

[0059] Step 1032 , control the hook 71 of the maintenance crane 70 in the machine room 3 to pass through the first rope-changing hole 10 and bypass the first rope-changing pulley block 14 .

[0060] Step 1033 , control the hook 71 to descend until the first end of the first new rope can be connected to the hook 71 .

[0061] Step 1034 , control the hook 71 to rise to pull the first end of the new rope into the machine room 3 .

[0062] In this embodiment, the first rope-changing hole 10 can be used to facilitate pulling the first end of the first new rope into the machine room 3. The first rope-changing pulley block 14 can make the first new steel wire rope 19 smoother in the process of entering the machine room 3, and will not cause friction and damage to the first new steel wire rope 19 and the first rope-changing hole 10. When the rope does not need to be changed, the first rope-changing hole 10 can be closed without affecting the normal operation of the machine room 3.

[0063] Figure 4 FIG. 1 is a schematic diagram of the steps of a crane trolley rope changing method provided by another embodiment of the present invention, referring to FIG. Fig.13 As shown, in one embodiment, as Figure 4 As shown, step 103 also includes:

[0064] Step 1035 , dispose the first new rope drum 23 wound with the first new steel wire rope 19 below the first rope-changing hole 10 .

[0065] Step 1036: align the midpoint of the length direction of the winding axis of the first new rope reel 23 with the plumb line where the geometric center of the first rope-changing hole 10 is located.

[0066] In this embodiment, the first new rope drum 23 located below the first rope-changing hole 10 allows the first new steel wire rope 19 to vertically pass through the first rope-changing hole 10 into the machine room, reducing the space occupancy rate of the first new steel wire rope 19 during its travel. In addition, the first new rope drum 23 and the first rope-changing hole 10 that are aligned with each other can only generate an upward pulling force on the first new rope drum 23 during the process of the first new steel wire rope 19 entering the first rope-changing hole 10, and will not cause the first new rope drum 23 to move sideways or have a tendency to move sideways, that is, after being aligned with each other, the first new rope drum 23 can be made more stable when releasing the rope.

[0067] Figure 5 FIG. 1 is a schematic diagram of the steps of a crane trolley rope changing method provided by another embodiment of the present application. Fig.12 and Fig.13 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, after the first old steel wire rope 5 and the second old steel wire rope 6 on the trolley drum 4 are led out, they extend to the pulley system below the machine room 3 to drive the trolley 2 located below the machine room 3 to move horizontally.

[0068] Among them, Figure 5 As shown, step 104 includes:

[0069] Step 1041, setting the first guide pulley 12, and making the horizontal height of the first guide pulley 12 higher than the horizontal height of the first rope-changing pulley group 14 and the horizontal height of the trolley drum 4.

[0070] In this step, the horizontal height of the lowest edge of the first guide pulley 12 is higher than the horizontal height of the highest edge of the first rope-changing pulley group 14, and higher than the horizontal height of the highest edge of the trolley drum 4.

[0071] Step 1042 , setting a third guide pulley 16 , and making the level of the third guide pulley 16 lower than the level of the bottom of the machine room 3 .

[0072] In this step, the level of the highest edge of the third guide pulley 16 is lower than the level of the bottom of the machine room 3 .

[0073] Step 1043, connect the first end of the new rope and the first end of the old rope to each other, and make the connected rope body pass through the first rope changing pulley group 14, the first guide pulley 12 and the third guide pulley 16 in sequence.

[0074] In this embodiment, since the first rope-changing hole 10 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 first new steel wire rope 19 passes through the first rope-changing hole 10 and is directly connected to the first old steel wire rope 5 and enters the pulley system of the trolley 2, friction interference will occur with many structures. The first guide pulley 12 allows the first new steel wire rope 19 to extend upward after entering the machine room 3. The third guide pulley 16 located below the machine room 3 allows the first new steel wire rope 19 to be located below the machine room 3 at the turning point of the third guide pulley 16, so that the first new steel wire rope 19 extends downward after passing through the first guide pulley 12, and then enters the steel wire rope pulley system of the trolley 2 without interference. In this embodiment, the first guide pulley 12 and the third guide pulley 16 are used to improve the routing flexibility of the first new steel wire rope 19 in the machine room 3, avoid wear of the first new steel wire rope 19 and avoid wear of some mechanisms in the machine room 3.

[0075] Figure 6 FIG. 1 is a schematic diagram of the steps of a crane trolley rope changing method provided by another embodiment of the present application. Fig.13 In one embodiment, a second rope-changing hole 11 which can be opened and closed is provided at the bottom of the machine room.

[0076] like Figure 6 As shown, step 103 includes:

[0077] Step 1037 , open the second rope-changing hole 11 , and install the second rope-changing pulley block 15 at the second rope-changing hole 11 .

[0078] Step 1038, control the hook of the maintenance crane in the machine room to pass through the second rope-changing hole 11 and bypass the second rope-changing pulley block 15.

[0079] Step 1039, control the hook to descend until the first end of the second new rope can be connected to the hook.

[0080] Step 10391, control the hook to rise to pull the first end of the second new rope into the machine room.

[0081] In this embodiment, the second rope-changing hole 11 can be used to facilitate pulling the head end of the second new rope into the machine room. The second rope-changing pulley block 15 can make the second new steel wire rope 20 smoother in the process of entering the machine room, and will not cause friction and damage to the second new steel wire rope 20 and the second rope-changing hole 11. When the rope does not need to be changed, the second rope-changing hole 11 can be closed without affecting the normal operation of the machine room.

[0082] Figure 7 FIG. 1 is a schematic diagram of the steps of a crane trolley rope changing method provided by another embodiment of the present application. Fig.13 As shown, in one embodiment, as Figure 7 As shown, step 103 also includes:

[0083] Step 10392: place the second new rope reel 24 wound with the second new steel wire rope 20 below the second rope changing hole 11.

[0084] Step 10393, align the midpoint of the length direction of the reel of the second new rope reel 24 with the plumb line where the geometric center of the second rope-changing hole 11 is located.

[0085] In this embodiment, the second new rope drum 24 located below the second rope-changing hole 11 allows the second new steel wire rope 20 to vertically pass through the second rope-changing hole 11 into the machine room, reducing the space occupancy rate of the second new steel wire rope 20 during its travel. In addition, the second new rope drum 24 and the second rope-changing hole 11 aligned with each other can only generate an upward pulling force on the second new rope drum 24 during the process of the second new steel wire rope 20 entering the second rope-changing hole 11, and will not cause the second new rope drum 24 to move sideways or have a tendency to move sideways, that is, after being aligned with each other, the second new rope drum 24 can be more stable when releasing the rope.

[0086] Figure 8 FIG. 1 is a schematic diagram of the steps of a crane trolley rope changing method provided by another embodiment of the present application. Fig.13As 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. That is, after the first old steel wire rope 5 and the second old steel wire rope 6 on the trolley drum 4 are led out, they extend to the pulley system below the machine room to drive the trolley 2 located below the machine room to translate.

[0087] like Figure 8 As shown, step 104 includes:

[0088] Step 1044, setting the second guide pulley 13, and making the horizontal height of the second guide pulley 13 higher than the horizontal height of the second rope-changing pulley group 15 and the horizontal height of the trolley drum 4.

[0089] In this step, the level of the lowest edge of the second guide pulley 13 is higher than the level of the highest edge of the second rope-changing pulley block 15 , and higher than the level of the highest edge of the trolley drum 4 .

[0090] Step 1045: Set the fourth guide pulley 17 so that the level of the fourth guide pulley 17 is lower than the level of the bottom of the machine room.

[0091] In this step, the level of the highest edge of the fourth guide pulley 17 is lower than the level of the bottom of the machine room.

[0092] Step 1046, connect the first end of the second new rope and the first end of the second old rope to each other, and make the connected rope body pass around the second rope changing pulley group 15, the second guide pulley 13 and the fourth guide pulley 17 in sequence.

[0093] In this embodiment, since the second rope-changing hole 11 is located at the bottom of the machine room, and the pulley system driving the trolley 2 is located below the machine room. If the second new steel wire rope 20 passes through the second rope-changing hole 11 and is directly connected to the second old steel wire rope and enters the pulley system of the trolley, friction interference will occur with many structures. The second guide pulley 13 allows the second new steel wire rope 20 to extend upward after entering the machine room. The fourth guide pulley 17 located below the machine room allows the second new steel wire rope 20 to be located below the machine room at the turning point of the fourth guide pulley 17, so that the second new steel wire rope 20 extends downward after passing through the second guide pulley 13, and then enters the steel wire rope pulley system of the trolley 2 without interference. In this embodiment, the second guide pulley 13 and the fourth guide pulley 17 are used to improve the routing flexibility of the second new steel wire rope 20 in the machine room, avoid wear of the second new steel wire rope 20, and avoid wear of some mechanisms in the machine room.

[0094] Fig. 9The figure shows a method step diagram of a crane trolley rope replacement method provided by another embodiment of the present application. In one embodiment, a switchable old rope release hole is provided at the bottom of the machine room, wherein the number of the old rope release holes can be one or more.

[0095] After step 107, the first old steel wire rope and the second old steel wire rope are basically all wound on the trolley drum, and after the first and second new rope ends are fixed, the old rope release process is performed to empty the trolley drum, and step 109 is performed after the old rope release process is completed. Fig. 9 As shown, the old rope release process includes:

[0096] Step 1081, open the old rope releasing hole, and install the old rope releasing pulley block at the old rope releasing hole.

[0097] Step 1082, pass the first old steel wire rope and the second old steel wire rope through the old rope releasing hole, pass around the old rope releasing pulley group, and then extend out of the machine room.

[0098] In this step, when the number of the old rope release holes is one, the first old steel wire rope and the second old steel wire rope are passed through the single old rope release hole. When the number of the old rope release holes is two, the first old steel wire rope and the second old steel wire rope are passed through one old rope release hole respectively, and the two old rope release holes can directly use the aforementioned first rope change hole and second rope change hole, and the old rope release pulley block can directly use the aforementioned first rope change pulley block and second rope change pulley block.

[0099] Step 1083, set an old rope frame below the old rope hole.

[0100] Step 1084, control the trolley drum to release the rope, so as to gradually put the first old steel wire rope and the second old steel wire rope into the old rope frame.

[0101] Step 1085, control the trolley drum to release the rope until the first old steel wire rope and the second old steel wire rope connected to the trolley drum can be removed.

[0102] Step 1086: Connect the removed first old rope end or the second old rope end to the hook of the maintenance crane in the machine room.

[0103] Step 1087, control the hook to pass through the old rope releasing hole and bypass the old rope releasing pulley group.

[0104] Step 1088, control the hook to descend to place the first old rope end or the second old rope end into the old rope frame.

[0105] In this embodiment, the first old rope and the second old rope can be easily released from the machine room through the old rope release hole. When the trolley drum releases the rope, the first old rope and the second old rope gradually fall down under the action of gravity. The old rope release pulley block can make the first old rope and the second old rope smoother in the process of releasing the rope from the machine room, and will not cause friction and damage to the first old rope, the second old rope and the old rope release hole. When it is not necessary to change the rope, the old rope release hole can be closed without affecting the normal operation of the machine room.

[0106] Example crane

[0107] The present application also provides a crane. Fig.10 Shown is a structural schematic diagram of a crane provided in one embodiment of the present application. Fig.11 The figure shows a partial structural schematic diagram of a crane trolley provided by an embodiment of the present application in normal operation. Fig.10 and Fig.11 As shown, the crane includes a crane body 1, a trolley 2, a machine room 3, a trolley drum 4, a first old steel wire rope 5 and a second old steel wire rope 6.

[0108] 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 clamp assembly 9, and the clamp assembly 9 is used to clamp the first old steel wire rope 5 and the second old steel wire rope 6. 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.

[0109] The first old rope head end of the first old steel wire rope 5 is fixed on the trolley drum 4, and the first old rope end of the first old steel wire rope 5 is fixed on the trolley drum 4 after passing through the tail trolley pulley group 7 and the head trolley pulley group 8 in sequence.

[0110] The second old rope head end of the second old steel wire rope 6 is fixed on the trolley drum 4, and the second old rope end of the second old steel wire rope 6 is fixed on the trolley drum 4 after passing through the tail trolley pulley group 7 and the head trolley pulley group 8 in sequence.

[0111] Specifically, for example, when the trolley drum 4 is performing a winding action, the first old steel wire rope 5 and the second old steel wire rope 6 on the first side of the trolley drum 4 are wound up to be shortened, and the first old steel wire rope 5 and the second old steel wire rope 6 on the second side of the trolley drum 4 are released to be elongated, so that the trolley drum 4 is translated toward the tail trolley pulley block 7. Alternatively, the first old steel wire rope 5 and the second old steel wire rope 6 on the first side of the trolley drum 4 are released to be elongated, and the first old steel wire rope 5 and the second old steel wire rope 6 on the second side of the trolley drum 4 are wound up to be shortened, so that the trolley drum 4 is translated toward the head trolley pulley block 8.

[0112] Fig.12 Shown is a partial structural schematic diagram of a crane trolley provided by an embodiment of the present application when replacing a wire rope. Fig.13 Shown is a partial structural schematic diagram of a crane trolley provided by an embodiment of the present application when replacing a wire rope. Fig.14 FIG. 1 is a partial structural schematic diagram of a crane trolley provided by an embodiment of the present application when replacing a wire rope. Fig.12 , Fig.13 and Fig.14 As shown, a first rope-changing hole 10 and a second rope-changing hole 11 are provided at the bottom of the machine room 3. The crane further comprises: a first rope-changing pulley block 14, a second rope-changing pulley block 15, a first guide pulley 12, a second guide pulley 13, a third guide pulley 16, a fourth guide pulley 17 and a plurality of fixing lugs 18.

[0113] The first rope-changing pulley block 14 is detachably connected to the first rope-changing hole 10, and the second rope-changing pulley block 15 is detachably connected to the second rope-changing hole 11. The first guide pulley 12 is arranged at a position whose horizontal height is higher than the horizontal height of the first rope-changing pulley block 14 and higher than the horizontal height of the trolley drum 4.

[0114] The second guide pulley 13 is arranged at a position whose horizontal height is higher than the horizontal height of the second rope-changing pulley block 15 and higher than the horizontal height of the trolley drum 4 .

[0115] The third guide pulley 16 is arranged at a level lower than the bottom of the machine room 3, and the fourth guide pulley 17 is arranged at a level lower than the bottom of the machine room 3. A plurality of fixing lugs 18 are arranged in the machine room 3, and the fixing lugs 18 are used to fix the wire ropes.

[0116] The level of the fourth guide pulley 17 is lower than the level of the bottom of the machine room, and the level of the highest edge of the fourth guide pulley 17 is lower than the level of the bottom of the machine room.

[0117] A plurality of fixing lug plates 18 are provided in the machine room 3 , and the fixing lug plates 18 are used to fix the steel wire ropes.

[0118] A maintenance crane 70 is arranged on the top of the machine room 3, and a liftable hook 71 is installed on the maintenance crane 70. The new steel wire rope can be pulled into the machine room or the old steel wire rope can be lowered through the hook 71.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] 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: Applicable to the process of replacing the steel wire rope of a crane trolley without a balancing pulley, the method comprises the steps of: Controlling the trolley drum to rotate until the first old steel wire rope and the second old steel wire rope located on the first side of the trolley drum can be removed from the trolley drum; Connecting the first new rope head end of the first new steel wire rope and the second new rope head end of the second new steel wire rope to the removed first old rope head end and the second old rope head end, respectively, to form a first new-old rope joint and a second new-old rope joint; Control the trolley drum to reel in the first old steel wire rope and the second old steel wire rope on the second side until the first old-new rope joint and the second old-new rope joint leave the machine room and re-enter the machine room; wherein the second side and the first side are the opposite sides of the trolley drum respectively; Controlling the trolley drum to reel in the first new steel wire rope and the second new steel wire rope until a first new rope end of the first new steel wire rope and a second new rope end of the second new steel wire rope enter the machine room; and Fixing the first new rope end and the second new rope end 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 first new rope head end can be connected to the hook; and The hook is controlled to rise so as to pull the first new rope head end into the machine room.

2. A crane trolley rope changing method according to claim 1, characterized in that: Also includes: Turn off the limit function, overspeed control function and circle calculation function of the trolley drum.

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

4. The crane trolley rope changing method according to claim 1, characterized in that: The trolley and the pulley system driving the trolley are both located below the horizontal plane where the bottom of the machine room is located; The method of connecting the first new rope head end of the first new steel wire rope and the second new rope head end of the second new steel wire rope to the removed first old rope head end and the second old rope head end to form the first new-old rope joint and the second new-old rope joint comprises: Arrange a first guide pulley, and make the level of the first guide pulley higher than the level of the first rope-changing pulley block and the level of the trolley drum; Arranging a third guide pulley, and making the level of the third guide pulley lower than the level of the bottom of the machine room; and The first new rope head end and the first old rope head end are connected to each other, and the connected rope body is passed around the first rope changing pulley group, the first guide pulley and the third guide pulley in sequence.

5. 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; Control the hook of the maintenance crane in the machine room to pass through the second rope-changing hole and bypass the second rope-changing pulley block; Controlling the hook to descend until the head end of the second new rope can be connected to the hook; and The hook is controlled to rise so as to pull the head end of the second new rope into the machine room.

6. The crane trolley rope changing method according to claim 5, characterized in that: The method further comprises: placing a second new rope drum wound with the second new steel wire rope below the second rope-changing hole; and Align the midpoint of the length direction of the reel of the second new rope reel with the plumb line where the geometric center of the second rope-changing hole is located.

7. The crane trolley rope changing method according to claim 5, characterized in that: The trolley and the pulley system driving the trolley are both located below the horizontal plane where the bottom of the machine room is located; The method of connecting the first new rope head end of the first new steel wire rope and the second new rope head end of the second new steel wire rope to the removed first old rope head end and the second old rope head end to form the first new-old rope joint and the second new-old rope joint comprises: Arrange a second guide pulley, and make the level of the second guide pulley higher than the level of the second rope-changing pulley block and the level of the trolley drum; Arranging a fourth guide pulley so that the level of the fourth guide pulley is lower than the level of the bottom of the machine room; and The first end of the second new rope and the first end of the second old rope are connected to each other, and the connected rope body is passed around the second rope-changing pulley group, the second guide pulley and the fourth guide pulley in sequence.

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

9. 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 moving between the tail trolley pulley block and the head trolley pulley block; A machine room connected to the crane body; A trolley reel is arranged at the bottom of the machine room; A first old steel wire rope, wherein the first old rope head end of the first old steel wire rope is fixed to the trolley drum, and the first old rope end of the first old steel wire rope is successively passed around the tail trolley pulley block and the head trolley pulley block and then fixed to the trolley drum; as well as A second old steel wire rope, wherein the first end of the second old steel wire rope is fixed to the trolley drum, and the second end of the second old steel wire rope is fixed to the trolley drum after passing through the tail trolley pulley block and the head trolley pulley block in sequence; Wherein, a clamp assembly is provided on the trolley, and the clamp assembly is used to clamp the first old steel wire rope and the second old steel wire rope.

10. The crane according to claim 9, 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 second rope-changing pulley block and higher than the horizontal height of the trolley drum; A third guide pulley is arranged at a level lower than the bottom of the machine room; a fourth guide pulley disposed at a level lower than 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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