Crawler crane and using method thereof

Abstract

The invention provides a crawler crane and a using method thereof.The crawler crane comprises a super-lifting mast, a super-lifting variable-amplitude pulley block, a traction device, a pulling plate assembly and a main arm, and the super-lifting variable-amplitude pulley block comprises a fixed pulley block and a movable pulley block connected with the fixed pulley block; the movable pulley block can move in the direction close to or away from the fixed pulley block, the fixed pulley block is fixedly connected to the end of the super-lifting mast, the pulling plate assembly is connected to the main arm, and the pulling plate assembly is arranged at the end, away from a rotary table of the crawler crane, of the main arm. The traction device is connected with the movable pulley block, and the traction device drives the movable pulley block to move towards the pulling plate assembly, so that the movable pulley block is connected with the pulling plate assembly. According to the crawler crane, the adaptability of the crawler crane to an operation site can be improved, the working efficiency of installation is improved, and time is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation construction, and in particular to a crawler crane and a use method thereof. Background Art

[0002] Under the super-lifting condition, the connection of the super-lifting pulling plate of the existing crawler crane adopts the following steps: first, the main luffing winch of the crawler crane is operated to release the rope, so that the super-lifting mast is lowered to a set angle toward the ground, and the super-lifting luffing pulley block is connected to the end of the super-lifting mast. At this time, the super-lifting luffing winch continues to release the rope to make the movable pulley of the super-lifting luffing pulley block fall under the traction of the super-lifting counterweight mounting block. When the super-lifting counterweight mounting block approaches the boom, the wire rope of the super-lifting luffing winch is stopped, the super-lifting counterweight mounting block is manually removed and placed in a warehouse or a designated storage location, and the wire rope on the auxiliary crane is connected to the movable pulley using a sling or rope, and the auxiliary crane is operated so that the wire rope of the auxiliary crane pulls the movable pulley to the connection point of the super-lifting pulling plate, so that the movable pulley is connected to the super-lifting pulling plate. The connection of the super-lifting pull plate in the prior art has the following disadvantages: (1) an auxiliary crane is required to wait on the side to assist in the connection of the super-lifting variable-length pulley block and the pull plate, which places greater demands on the work site and is not applicable to small work sites; (2) the use of a crane for auxiliary work has low work efficiency, wastes time, and occupies an auxiliary crane to increase the operating cost. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a crawler crane, which can solve the problems existing in the prior art, improve the adaptability of the crawler crane to the work site, improve the work efficiency of installation, and save time.

[0004] The present invention provides a crawler crane, comprising a superlift mast, a superlift luffing pulley block, a traction device, a pull plate assembly and a main arm, wherein the superlift luffing pulley block comprises a fixed pulley block and a movable pulley block connected to the fixed pulley block, wherein the movable pulley block can move in a direction close to or away from the fixed pulley block, wherein the fixed pulley block is fixedly connected to the end of the superlift mast, wherein the pull plate assembly is connected to the main arm, wherein the pull plate assembly is arranged at one end of the main arm away from the turntable of the crawler crane, wherein the traction device is connected to the movable pulley block, wherein the traction device drives the movable pulley block to move in a direction close to the pull plate assembly, thereby connecting the movable pulley block to the pull plate assembly.

[0005] In one embodiment, the traction device includes a lifting mechanism, a first wheel, a second wheel, a third wheel and a fourth wheel. The lifting mechanism is installed on the turntable of the crawler crane, the first wheel and the second wheel are arranged opposite to each other, the first wheel is arranged at one end of the super lifting mast close to the turntable, the second wheel is arranged at one end of the super lifting mast close to the fixed pulley group, the third wheel and the fourth wheel are respectively connected to the main arm, the third wheel and the fourth wheel are arranged at intervals along the length direction of the main arm, the lifting wire rope of the lifting mechanism is arranged to pass around the first wheel, the end of the super lifting mast, the second wheel, the third wheel and the fourth wheel in sequence, the movable pulley group is located between the third wheel and the fourth wheel when it is vertically downward, the end of the lifting wire rope is connected to the movable pulley group, and when the lifting wire rope is tightened, it can drive the movable pulley group to move in the direction close to the pull plate assembly.

[0006] In one embodiment, the traction device includes a driving mechanism, and the driving mechanism is connected to the main arm. After the movable pulley block is connected to the driving mechanism, the driving mechanism can drive the movable pulley block to move in a direction close to the pulling plate assembly.

[0007] In one embodiment, the driving mechanism includes a sensor and a self-locking buckle, and the self-locking buckle is electrically connected to the sensor. When the sensor detects that the movable pulley group enters the range of the self-locking buckle, the self-locking buckle engages with the movable pulley group to achieve automatic connection.

[0008] In one embodiment, the traction device includes a first winch and a fourth wheel, the fourth wheel is connected to the main arm, the first winch is arranged between the turntable of the crawler crane and the fourth wheel, the movable pulley group is arranged between the first winch and the fourth wheel, the first wire rope of the first winch passes around the fourth wheel and is connected to the movable pulley group, and tightening the first wire rope can drive the movable pulley group to move in a direction close to the pull plate assembly; or the traction device includes a second winch and a fourth wheel, the fourth wheel is connected to the main arm, the second winch is arranged at one end of the main arm close to the pull plate assembly, the fourth wheel is arranged between the movable pulley group and the winch, the second wire rope of the second winch passes around the fourth wheel and is connected to the movable pulley group, and when the second wire rope is tightened, it can drive the movable pulley group to move in a direction close to the pull plate assembly.

[0009] In one embodiment, the main arm includes an upper chord, a lower chord and a column, the upper chord is arranged opposite to the lower chord, the column is fixedly connected between the upper chord and the lower chord, one end of the fourth wheel is fixedly connected to the upper chord, when the other end of the fourth wheel is connected to the column, the fourth wheel is arranged in the main arm; when the other end of the fourth wheel is connected to the upper chord, the fourth wheel is arranged on the surface of the upper chord, and the lifting wire rope, the first wire rope or the second wire rope can bypass the fourth wheel.

[0010] In one embodiment, the traction device includes a counterweight mounting block, which is detachably connected to the main arm. When the movable pulley block is connected to the counterweight mounting block, the counterweight mounting block is disassembled from the main arm. The movable pulley block can move in a direction away from the fixed pulley block under the action of the gravity of the counterweight mounting block. When the movable pulley block moves to the same horizontal plane as the upper chord of the main arm, the counterweight mounting block is connected to the main arm, and the counterweight mounting block is disassembled from the movable pulley block.

[0011] In one embodiment, the counterweight mounting block is installed on the fourth boom section of the main arm before being connected to the movable pulley block; and the counterweight mounting block is installed on the fourth boom section of the main arm after being disassembled from the movable pulley block.

[0012] The present invention also relates to a method for using the crawler crane, the method comprising:

[0013] The movable pulley group of the super-lifting and luffing pulley is moved toward the direction close to the main arm; the lifting wire rope of the lifting mechanism is passed around the first wheel, the end of the super-lifting mast, the second wheel, the third wheel and the fourth wheel in sequence, and the movable pulley group of the super-lifting and luffing pulley is connected to one end of the lifting wire rope. The lifting mechanism tightens the lifting wire rope so that the lifting wire rope pulls the movable pulley group toward the direction close to the pull plate assembly to the connection point of the pull plate assembly.

[0014] The movable pulley block of the super-lifting luffing pulley is connected to a traction device, and the traction device drives the movable pulley block to move toward the direction close to the pull plate assembly; and the movable pulley block is connected to the pull plate assembly.

[0015] In one embodiment, before the movable pulley block is connected to the traction device, the superlift mast is first lowered toward the ground so that the movable pulley block of the superlift luffing mechanism is close to the counterweight mounting block of the main arm; one end of the counterweight mounting block is removed from the main arm and connected to the movable pulley block; the other end of the counterweight mounting block is removed from the main arm so that the counterweight mounting block is separated from the main arm; the superlift mast is raised to move the superlift mast away from the ground, and the distance between the movable pulley block and the fixed pulley block increases under the action of the gravity of the counterweight mounting block.

[0016] The crawler crane of the present invention connects the traction device with the main arm, and the traction device pulls the movable pulley block of the super-lifting and luffing pulley block to the connection point of the pull plate assembly, so that the movable pulley block is connected to the pull plate assembly, thereby improving the use ability of the crawler crane on the working site and solving the problem in the prior art that the auxiliary crane cannot be used due to the small site. The crawler crane can realize the connection between the super-lifting and luffing pulley block and the pull plate assembly through its own structure, thereby improving the convenience of installation and saving time, and at the same time reducing the operating cost of using the auxiliary crane in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a structural schematic diagram of a crawler crane and a counterweight mounting block ready to be connected according to a first embodiment of the present invention.

[0019] Figure 2 It is a structural schematic diagram of a crawler crane and a counterweight mounting block connected according to the first embodiment of the present invention.

[0020] Figure 3 It is a structural schematic diagram of the first embodiment of the present invention in which one end of the counterweight mounting block is installed with the main arm when it is stored.

[0021] Figure 4 It is a structural schematic diagram of the other end of the counterweight mounting block of the first embodiment of the present invention being mounted on the main arm when the counterweight mounting block is stored.

[0022] Figure 5 It is a schematic structural diagram of a counterweight installation block housed in a main arm according to a first embodiment of the present invention.

[0023] Figure 6It is a structural schematic diagram of the traction device of the first embodiment of the present invention driving the super-lifting variable-length pulley to connect with the pulling plate assembly.

[0024] Figure 7 It is a schematic structural diagram of the fourth boom of the first embodiment of the present invention.

[0025] Figure 8 It is a structural schematic diagram of the crawler crane raising the main boom according to the first embodiment of the present invention.

[0026] Explanation of the accompanying drawings: super-lifting mast-11; super-lifting luffing pulley block-12; fixed pulley block-121; movable pulley block-122; first pulley-131; second pulley-132; third pulley-133; fourth pulley-134; first mounting section-1341; second mounting section-1342; roller-1343; counterweight mounting block-135; lifting mechanism-136; lifting wire rope-1361; pull plate assembly-14; main boom-15; fourth boom-151; upper chord-1511; lower chord-1512; vertical pole-1513; fifth boom-152; turntable-16; main luffing mechanism-17; super-lifting luffing mechanism-18.

[0027] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the description of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] The directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front”, “back”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0031] The terms "first", "second", "third" and the like are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0032] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0033] First embodiment

[0034] like Figures 1 to 8 As shown, the crawler crane includes a superlift mast 11, a superlift luffing pulley block 12, a traction device, a pull plate assembly 14 and a main arm 15. The superlift luffing pulley block 12 includes a fixed pulley block 121 and a movable pulley block 122 connected to the fixed pulley block 121, the movable pulley block 122 can move toward or away from the fixed pulley block 121, the fixed pulley block 121 is fixedly connected to the end of the superlift mast 11, the pull plate assembly 14 is connected to the main arm 15, the pull plate assembly 14 is arranged at one end of the main arm 15 away from the turntable 16 of the crawler crane, the traction device is connected to the movable pulley block 122, the traction device drives the movable pulley block 122 to move toward the direction close to the pull plate assembly 14, so that the movable pulley block 122 is connected to the pull plate assembly 14. In this embodiment, the crawler crane also includes a turntable 16, a main luffing mechanism 17 and a super-lifting luffing mechanism 18, the main luffing mechanism 17 and the super-lifting luffing mechanism 18 are respectively connected to the turntable 16, the main luffing mechanism 17 is used to control the lifting and lowering of the super-lifting mast 11, and the super-lifting luffing mechanism 18 is used to control the lifting and lowering of the super-lifting luffing pulley block 12, wherein the fixed pulley block 121 of the super-lifting luffing pulley block 12 is connected to the end of the super-lifting mast 11 through a pin shaft, the fixed pulley block 121 of the super-lifting luffing pulley block 12 is provided with a fixed pulley, and the movable pulley block 122 of the super-lifting luffing pulley is provided with a movable pulley.

[0035] The crawler crane of the present invention connects the traction device with the main arm 15, and the traction device pulls the movable pulley block 122 of the super-lifting and luffing pulley block 12 to the connection point of the pull plate assembly 14, so that the movable pulley block 122 is connected to the pull plate assembly 14, thereby improving the use ability of the crawler crane on the work site and solving the problem in the prior art that the auxiliary crane cannot be used due to the small site. The crawler crane can realize the connection between the super-lifting and luffing pulley block 12 and the pull plate assembly 14 through its own structure, thereby improving the convenience of installation and saving time, and at the same time reducing the operating cost of using the auxiliary crane in the prior art.

[0036] Preferably, the traction device includes a counterweight mounting block 135, which is detachably connected to the main arm 15, and the counterweight mounting block 135 is arranged on the fourth arm section 151 of the main arm 15. When the movable pulley block 122 is connected to the counterweight mounting block 135, the counterweight mounting block is disassembled from the main arm 15; because when the super-lift mast is lying forward, the end of the super-lift mast is located within the length range of the fourth arm section 151, in order to make the installation of the movable pulley block 122 and the counterweight mounting block 135 do not require the aid of other mechanical structures, and to make the installation of the movable pulley block 122 and the counterweight mounting block 135 more convenient, the counterweight mounting block 135 is arranged at the fourth arm section 151. Specifically, both ends of the counterweight mounting block 135 are connected to the main arm 15 through the first pin shaft and the second pin shaft respectively. In the initial state, the counterweight mounting block 135 is installed on the main arm 15. When the super-lifting luffing pulley block 12 and the super-lifting mast 11 are installed, the super-lifting luffing pulley block 12 is a horizontal or inclined turntable 16, so that the main luffing mechanism 17 is retracted, and the super-lifting mast 11 is lifted to a set height. At this time, the super-lifting luffing pulley block 12 is vertically arranged, and the super-lifting mast 11 is lifted by a forklift or an auxiliary crane. The main boom 15 of 35 is moved to the bottom of the super-lifting luffing pulley block 12, the first pin shaft connecting the counterweight mounting block 135 and the main boom 15 is removed, the movable pulley block 122 is connected to the counterweight mounting block 135 through the third pin shaft, the second pin shaft connecting the counterweight mounting block 135 and the main boom 15 is removed, the counterweight mounting block 135 is separated from the main boom 15, the main luffing mechanism 17 is retracted, and the super-lifting mast 11 is raised in a direction away from the ground, in preparation for the installation of the main boom 15 and the super-lifting luffing pulley block 12.

[0037] Preferably, when the movable pulley block 122 moves to the same horizontal plane as the upper chord 1511 of the main arm 15 , the counterweight mounting block 135 is connected to the main arm 15 , and the counterweight mounting block 135 and the movable pulley block 122 are disassembled. Specifically, the main luffing mechanism 17 releases the rope to make the superlift mast 11 lie forward, and at the same time, the superlift luffing mechanism 18 releases the rope, and the movable pulley block 122 of the superlift luffing pulley block 12 moves in a direction away from the fixed pulley block 121, that is, moves in a direction close to the main arm 15, and the counterweight mounting block 135 is used to accelerate the descending speed of the movable pulley block 122. At this time, when the movable pulley block 122 descends to the middle position of the fourth boom 151 of the main boom 15, the main luffing mechanism 17 stops releasing the rope and keeps the superlift mast 11 motionless, and the superlift luffing mechanism 18 continues to release the rope until the counterweight mounting block 135 reaches the installation position of the fourth boom 151, and moves the counterweight mounting block 135 away from the movable pulley block 122. One end of the counterweight mounting block 135 is connected to the main arm 15 through the second pin shaft, and then the super-lifting and luffing mechanism 18 is operated to continue to release the rope, so that the counterweight mounting block 135 rotates counterclockwise around the second pin shaft, and the third pin shaft is removed, so that the end of the counterweight mounting block 135 close to the movable pulley block 122 is connected to the main arm 15 through the first pin shaft, so that the counterweight mounting block 135 is completely fixed on the main arm 15, and the storage of the counterweight mounting block 135 is achieved, and then the super-lifting and luffing mechanism 18 is operated to collect the rope, so that the movable pulley block 122 is lifted slightly above the main arm 15; by directly connecting the counterweight mounting block 135 to the main arm 15 for storage after use, the storage problem of the counterweight mounting block 135 in the prior art is solved, and the installation efficiency is improved.

[0038] Preferably, the traction device includes a lifting mechanism 136, a first wheel 131, a second wheel 132, a third wheel 133 and a fourth wheel 134, the lifting mechanism 136 is connected to the turntable 16 of the crawler crane, the first wheel 131 and the second wheel 132 are connected to the super lifting mast 11, the first wheel 131 and the second wheel 132 are arranged opposite to each other, the first wheel 131 is arranged at one end of the super lifting mast 11 close to the turntable 16, the second wheel 132 is arranged at one end of the super lifting mast 11 close to the fixed pulley block 121, the third wheel 133 and the fourth wheel 134 are respectively connected to the main Arm 15, the third wheel 133 and the fourth wheel 134 are arranged at intervals along the length direction of the main arm 15, and the lifting wire rope 1361 of the lifting mechanism 136 is arranged to pass around the first wheel 131, the end of the super-lifting mast 11, the second wheel 132, the third wheel 133 and the fourth wheel 134 in sequence. When the movable pulley group 122 is vertically downward, it is located between the third wheel 133 and the fourth wheel 134, and the end of the lifting wire rope 1361 is connected to the movable pulley group 122. When the lifting wire rope 1361 is tightened, it can drive the movable pulley group 122 to move toward the direction close to the pull plate assembly 14. In this embodiment, the fourth pulley 134 is connected to the fourth section arm 151 or the fifth section arm 152 of the main arm 15. After the head of the pull plate assembly 14 is connected to the head of the main arm 15, the head of the pull plate assembly 14 is straightened, and the tail of the pull plate assembly 14 is located at the fourth section arm 151 or the fifth section arm 152 close to the fourth section arm 151. Therefore, setting the fourth pulley 134 on the fourth section arm 151 can enable the first wire rope of the first winch to pull the movable pulley block 122 from the vertical downward direction. The lifting wire rope 1361 is pulled to the right to the tail of the pull plate assembly 14 and connected with the pull plate assembly 14. It is more convenient to set it on the fourth arm 151. If it is set on the fifth arm, the lifting wire rope 1361 needs to be pulled for an extra section, and the wire rope itself is heavier (the weight of 2 meters is 10kg). After the movable pulley group 122 is connected with the pull plate assembly 14, the lifting wire rope 1361 needs to be manually retracted. The excessive weight of the lifting wire rope 1361 will make manual operation more laborious.

[0039] Preferably, the main arm 15 includes an upper chord 1511, a lower chord 1512 and a plurality of columns, the upper chord 1511 and the lower chord 1512 are arranged opposite to each other, and each column is fixedly connected between the upper chord 1511 and the lower chord 1512, one end of the fourth wheel 134 is fixedly connected to the upper chord 1511, when the other end of the fourth wheel 134 is connected to the column 1513, the fourth wheel 134 is arranged in the main arm 15; when the other end of the fourth wheel 134 is connected to the upper chord 1511, the fourth wheel 134 is arranged on the surface of the upper chord 1511, and the lifting wire rope 1361, the first wire rope or the second wire rope can be arranged around the fourth wheel 134. Specifically, the fourth pass pulley 134 includes a first mounting section 1341, a roller 1343, and a second mounting section. The roller 1343 is rotatably connected between the first mounting section 1341 and the second mounting section 1342. An acute angle is formed between the first mounting section 1341 and the second mounting section 1342. In an initial state, the first mounting section 1341 is fixedly connected to the upper chord rod 1511, and the second mounting section 1342 is connected to the vertical rod 1513 through a fourth pin shaft. When it is necessary to connect the movable pulley block 122 to the main arm 15, the fourth pin shaft is disassembled to separate the second mounting section 1342 from the vertical rod 1513, and the movable pulley block 122 is rotated. The second mounting section 1342 and the roller 1343 are rotated to the top of the upper chord rod 1511, so that the second mounting section 1342 is connected to the upper chord rod 1511. At this time, a triangular structure is formed between the first mounting section 1341, the second mounting section 1342 and the upper chord rod 1511. The lifting wire rope 1361 is pulled to the fifth boom 152 by threading and hoisting, so that the lifting wire rope 1361 can bypass the fourth wheel 134, and then the operator manually pulls the lifting wire rope 1361 to the movable pulley block 122, and the lifting wire rope 1361 is fixedly connected to the movable pulley block 122 by a sling or rope. In this embodiment, the structure and setting method of the third wheel 133 are the same as those of the fourth wheel 134, and no excessive details are given here.

[0040] Preferably, the lifting mechanism 136 retracts the rope, and the lifting wire rope 1361 pulls the movable pulley block 122 to move toward the direction close to the pull plate assembly 14 until the movable pulley block 122 reaches the installation position of the pull plate assembly 14, and connects the movable pulley block 122 with the pull plate assembly 14. In the process of connecting the pull plate assembly 14 and the movable pulley block 122, the hole alignment can be adjusted by releasing the lifting wire rope 1361 or leaning forward the super lifting mast 11. After the connection of the pull plate assembly 14 is completed, the next step of raising the arm in the super lifting condition can be carried out.

[0041] The present invention also relates to a method for using a crawler crane, the method comprising:

[0042] The first step is to move the movable pulley block 122 of the superlift luffing pulley toward the direction close to the main arm 15; that is, first lower the superlift mast 11 toward the ground, so that the movable pulley block 122 of the superlift luffing mechanism 18 is close to the counterweight mounting block 135 of the main arm 15.

[0043] The second step is to remove one end of the counterweight mounting block 135 from the main arm 15 and connect it to the movable pulley block 122, and remove the other end of the counterweight mounting block 135 from the main arm 15 to separate the counterweight mounting block 135 from the main arm 15; specifically, remove the first pin connecting the counterweight mounting block 135 and the main arm 15, connect the movable pulley block 122 and the counterweight mounting block 135 through the third pin, remove the second pin connecting the counterweight mounting block 135 and the main arm 15, separate the counterweight mounting block 135 from the main arm 15, retract the main luffing mechanism 17, and raise the super-lifting mast 11 in a direction away from the ground, so as to prepare for the installation of the main arm 15 and the super-lifting luffing pulley block 12.

[0044] The third step is to raise the superlift mast 11 to move the superlift mast 11 away from the ground, and the distance between the movable pulley block 122 and the fixed pulley block 121 becomes larger under the gravity of the counterweight mounting block 135; specifically, after the main boom 15 is installed, the main luffing mechanism 17 releases the rope to make the superlift mast 11 lie forward, and at the same time, the superlift luffing mechanism 18 releases the rope, and the movable pulley block 122 of the superlift luffing pulley block 12 moves in the direction away from the fixed pulley block 121, that is, moves in the direction close to the main boom 15, and the counterweight mounting block 135 is used to speed up the descending speed of the movable pulley block 122. At this time, when the movable pulley block 122 descends to the middle position of the fourth section arm 151 of the main boom 15, the main luffing mechanism 17 stops releasing the rope, and Keep the super-lift mast 11 stationary, and the super-lift luffing mechanism 18 continues to release the rope until the counterweight mounting block 135 reaches the installation position of the fourth section arm 151, and connect the end of the counterweight mounting block 135 away from the movable pulley block 122 to the main arm 15 through the second pin shaft. Then operate the super-lift luffing mechanism 18 to continue releasing the rope, so that the counterweight mounting block 135 rotates counterclockwise around the second pin shaft, remove the third pin shaft, and connect the end of the counterweight mounting block 135 close to the movable pulley block 122 to the main arm 15 through the first pin shaft, so that the counterweight mounting block 135 is completely fixed on the main arm 15 and the counterweight mounting block 135 is stored. Then the super-lift luffing mechanism 18 retracts the rope, so that the movable pulley block 122 is lifted slightly above the main arm 15.

[0045] The fourth step is to connect the movable pulley block 122 of the super-lifting luffing pulley with the traction device, and the traction device drives the movable pulley block 122 to move in the direction close to the pull plate assembly 14; specifically, when it is necessary to connect the movable pulley block 122 with the main arm 15, the fourth pin is removed to separate the second mounting section 1342 from the vertical rod 1513, and the second mounting section 1342 and the roller 1343 are rotated to the top of the upper chord rod 1511, so that the second mounting section 1342 and the upper chord rod 1511 are connected. At this time, a triangular structure is formed between the first installation section 1341, the second installation section 1342 and the upper chord 1511, and the lifting wire rope 1361 is pulled to the fifth boom 152 by the rope hoisting, so that the lifting wire rope 1361 can bypass the fourth pulley 134, and then the operator manually pulls the lifting wire rope 1361 to the movable pulley block 122, and the lifting wire rope 1361 is fixedly connected to the movable pulley block 122 by a sling or rope. In this embodiment, the structure and setting method of the third pulley 133 are the same as those of the fourth pulley 134, and no excessive details are given here.

[0046] The fifth step is to connect the movable pulley block 122 to the pull plate assembly 14; specifically, the lifting mechanism 136 retracts the rope, and the lifting wire rope 1361 pulls the movable pulley block 122 toward the direction close to the pull plate assembly 14 until the movable pulley block 122 reaches the installation position of the pull plate assembly 14, and connects the movable pulley block 122 to the pull plate assembly 14.

[0047] Second embodiment

[0048] The crawler crane of this embodiment is substantially the same in structure as the crawler crane of the first embodiment, except that the structure of the traction device is different.

[0049] Specifically, the traction device includes a driving mechanism, which is connected to the main arm 15. After the movable pulley block 122 is connected to the driving mechanism, the driving mechanism can drive the movable pulley block 122 to move in the direction close to the pull plate assembly 14. In this embodiment, the driving mechanism includes a mounting seat and a driver. The mounting seat is fixedly connected in the main arm 15, the driver is connected to the mounting seat, the movable pulley block 122 is connected to the driving end of the driver, and the driver can drive the movable pulley block 122 to move along the length direction of the main arm 15; the driver is preferably a motor or a telescopic cylinder, etc., but is not limited thereto.

[0050] Preferably, the driving mechanism includes a sensor and a self-locking buckle, the self-locking buckle is electrically connected to the sensor, and the self-locking buckle is fixedly connected to the driving end of the driver. When the sensor detects that the movable pulley group 122 enters the range of the self-locking buckle, the self-locking buckle engages with the movable pulley group 122 to achieve automatic connection, which not only improves work efficiency but also saves labor and time.

[0051] The present invention also relates to a method for using a crawler crane, the method comprising:

[0052] The first step is to move the movable pulley block 122 of the superlift luffing pulley toward the direction close to the main arm 15; that is, first lower the superlift mast 11 toward the ground, so that the movable pulley block 122 of the superlift luffing mechanism 18 is close to the counterweight mounting block 135 of the main arm 15.

[0053] The second step is to remove one end of the counterweight mounting block 135 from the main arm 15 and connect it to the movable pulley block 122, and remove the other end of the counterweight mounting block 135 from the main arm 15 to separate the counterweight mounting block 135 from the main arm 15; specifically, remove the first pin connecting the counterweight mounting block 135 and the main arm 15, connect the movable pulley block 122 and the counterweight mounting block 135 through the third pin, remove the second pin connecting the counterweight mounting block 135 and the main arm 15, separate the counterweight mounting block 135 from the main arm 15, retract the main luffing mechanism 17, and raise the super-lifting mast 11 in a direction away from the ground, so as to prepare for the installation of the main arm 15 and the super-lifting luffing pulley block 12.

[0054] The third step is to raise the superlift mast 11 to move the superlift mast 11 away from the ground, and the distance between the movable pulley block 122 and the fixed pulley block 121 becomes larger under the gravity of the counterweight mounting block 135; specifically, after the main boom 15 is installed, the main luffing mechanism 17 releases the rope to make the superlift mast 11 lie forward, and at the same time, the superlift luffing mechanism 18 releases the rope, and the movable pulley block 122 of the superlift luffing pulley block 12 moves in the direction away from the fixed pulley block 121, that is, moves in the direction close to the main boom 15, and the counterweight mounting block 135 is used to speed up the descending speed of the movable pulley block 122. At this time, when the movable pulley block 122 descends to the middle position of the fourth section arm 151 of the main boom 15, the main luffing mechanism 17 stops releasing the rope, and Keep the super-lift mast 11 stationary, and the super-lift luffing mechanism 18 continues to release the rope until the counterweight mounting block 135 reaches the installation position of the fourth section arm 151, and connect the end of the counterweight mounting block 135 away from the movable pulley block 122 to the main arm 15 through the second pin shaft. Then operate the super-lift luffing mechanism 18 to continue releasing the rope, so that the counterweight mounting block 135 rotates counterclockwise around the second pin shaft, remove the third pin shaft, and connect the end of the counterweight mounting block 135 close to the movable pulley block 122 to the main arm 15 through the first pin shaft, so that the counterweight mounting block 135 is completely fixed on the main arm 15 and the counterweight mounting block 135 is stored. Then the super-lift luffing mechanism 18 retracts the rope, so that the movable pulley block 122 is lifted slightly above the main arm 15.

[0055] The fourth step is to connect the movable pulley group 122 of the super-lifting variable-length pulley with the traction device, and the traction device drives the movable pulley group 122 to move in the direction close to the pull plate assembly 14; specifically, when the movable pulley group 122 drops to the range of the self-locking buckle, when the sensor detects that the movable pulley group 122 enters the range of the self-locking buckle, the self-locking buckle engages with the movable pulley group 122 to achieve automatic connection, and the driver drives the movable pulley group 122 to move in the direction close to the pull plate assembly 14.

[0056] The fifth step is to connect the movable pulley block 122 to the pull plate assembly 14; specifically, the lifting mechanism 136 retracts the rope, and the lifting wire rope 1361 pulls the movable pulley block 122 toward the direction close to the pull plate assembly 14 until the movable pulley block 122 reaches the installation position of the pull plate assembly 14, and connects the movable pulley block 122 to the pull plate assembly 14.

[0057] Third embodiment

[0058] The crawler crane of this embodiment is substantially the same in structure as the crawler crane of the first embodiment, except that the structure of the traction device is different.

[0059] Specifically, the traction device includes a first winch and a fourth wheel 134, the fourth wheel 134 is connected to the main arm 15, and can be connected to the fourth section arm 151 or the fifth section arm 152 of the main arm 15 (because after the head of the pull plate assembly 14 is connected to the head of the main arm 15, after the head of the pull plate assembly 14 is straightened, the tail of the pull plate assembly 14 is located at the fourth section arm 151 or the fifth section arm 152 close to the fourth section arm 151, so setting the fourth wheel 134 on the fourth section arm 151 or the fifth section arm 152 can make the first winch The first wire rope of the winch pulls the movable pulley block 122 from the vertical downward position to the right to the tail of the pull plate assembly 14 and is connected to the pull plate assembly 14). The first winch is arranged between the turntable 16 of the crawler crane and the fourth wheel 134, and the movable pulley block 122 is arranged between the first winch and the fourth wheel 134. The first wire rope of the first winch bypasses the fourth wheel 134 and is connected to the movable pulley block 122. Tightening the first wire rope can drive the movable pulley block 122 to move toward the direction close to the pull plate assembly 14.

[0060] In another preferred embodiment, the traction device includes a second winch and a fourth wheel 134. The fourth wheel 134 is connected to the main arm 15 and can be connected to the fourth section arm 151 or the fifth section arm 152 of the main arm 15. The second winch is arranged at one end of the main arm 15 close to the pull plate assembly 14. The fourth wheel 134 is arranged between the movable pulley group 122 and the second winch. The second steel wire rope of the second winch passes around the fourth wheel 134 and is connected to the movable pulley group 122. When the second steel wire rope is tightened, it can drive the movable pulley group 122 to move toward the direction close to the pull plate assembly 14.

[0061] The present invention also relates to a method for using a crawler crane, the method comprising:

[0062] The first step is to move the movable pulley block 122 of the superlift luffing pulley toward the direction close to the main arm 15; that is, first lower the superlift mast 11 toward the ground, so that the movable pulley block 122 of the superlift luffing mechanism 18 is close to the counterweight mounting block 135 of the main arm 15.

[0063] The second step is to remove one end of the counterweight mounting block 135 from the main arm 15 and connect it to the movable pulley block 122, and remove the other end of the counterweight mounting block 135 from the main arm 15 to separate the counterweight mounting block 135 from the main arm 15; specifically, remove the first pin connecting the counterweight mounting block 135 and the main arm 15, connect the movable pulley block 122 and the counterweight mounting block 135 through the third pin, remove the second pin connecting the counterweight mounting block 135 and the main arm 15, separate the counterweight mounting block 135 from the main arm 15, retract the main luffing mechanism 17, and raise the super-lifting mast 11 in a direction away from the ground, so as to prepare for the installation of the main arm 15 and the super-lifting luffing pulley block 12.

[0064] The third step is to raise the superlift mast 11 to move the superlift mast 11 away from the ground, and the distance between the movable pulley block 122 and the fixed pulley block 121 becomes larger under the gravity of the counterweight mounting block 135; specifically, after the main boom 15 is installed, the main luffing mechanism 17 releases the rope to make the superlift mast 11 lie forward, and at the same time, the superlift luffing mechanism 18 releases the rope, and the movable pulley block 122 of the superlift luffing pulley block 12 moves in the direction away from the fixed pulley block 121, that is, moves in the direction close to the main boom 15, and the counterweight mounting block 135 is used to speed up the descending speed of the movable pulley block 122. At this time, when the movable pulley block 122 descends to the middle position of the fourth section arm 151 of the main boom 15, the main luffing mechanism 17 stops releasing the rope, and Keep the super-lift mast 11 stationary, and the super-lift luffing mechanism 18 continues to release the rope until the counterweight mounting block 135 reaches the installation position of the fourth section arm 151, and connect the end of the counterweight mounting block 135 away from the movable pulley block 122 to the main arm 15 through the second pin shaft. Then operate the super-lift luffing mechanism 18 to continue releasing the rope, so that the counterweight mounting block 135 rotates counterclockwise around the second pin shaft, remove the third pin shaft, and connect the end of the counterweight mounting block 135 close to the movable pulley block 122 to the main arm 15 through the first pin shaft, so that the counterweight mounting block 135 is completely fixed on the main arm 15 and the counterweight mounting block 135 is stored. Then the super-lift luffing mechanism 18 retracts the rope, so that the movable pulley block 122 is lifted slightly above the main arm 15.

[0065] The fourth step is to connect the movable pulley group 122 of the super-lifting variable-length pulley with the traction device, and the traction device drives the movable pulley group 122 to move in the direction close to the pull plate assembly 14; specifically, the movable pulley group 122 is arranged between the first winch and the fourth pulley 134, the first wire rope of the first winch passes around the fourth pulley 134 and is connected to the movable pulley group 122, and tightening the first wire rope can drive the movable pulley group 122 to move in the direction close to the pull plate assembly 14; or the fourth pulley 134 is arranged between the movable pulley group 122 and the winch, the second wire rope of the second winch passes around the fourth pulley 134 and is connected to the movable pulley group 122, and when the second wire rope is tightened, it can drive the movable pulley group 122 to move in the direction close to the pull plate assembly 14.

[0066] The fifth step is to connect the movable pulley block 122 to the pull plate assembly 14; specifically, the lifting mechanism 136 retracts the rope, and the lifting wire rope 1361 pulls the movable pulley block 122 toward the direction close to the pull plate assembly 14 until the movable pulley block 122 reaches the installation position of the pull plate assembly 14, and connects the movable pulley block 122 to the pull plate assembly 14.

[0067] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A crawler crane, characterized in that: The invention comprises a superlift mast (11), a superlift luffing pulley block (12), a traction device, a pull plate assembly (14) and a main arm (15), wherein the superlift luffing pulley block (12) comprises a fixed pulley block (121) and a movable pulley block (122) connected to the fixed pulley block (121), wherein the movable pulley block (122) can move in a direction close to or away from the fixed pulley block (121), and the fixed pulley block (121) is fixedly connected to the superlift mast (11). 11), the plate pulling assembly (14) is connected to the main arm (15), the plate pulling assembly (14) is arranged at one end of the main arm (15) away from the turntable (16) of the crawler crane, the traction device is connected to the movable pulley group (122), and the traction device drives the movable pulley group (122) to move in a direction close to the plate pulling assembly (14), so that the movable pulley group (122) is connected to the plate pulling assembly (14).

2. The crawler crane according to claim 1, characterized in that: The traction device comprises a lifting mechanism (136), a first passing wheel (131), a second passing wheel (132), a third passing wheel (133) and a fourth passing wheel (134); the lifting mechanism (136) is installed on a turntable (16) of the crawler crane. The first passing wheel (131) and the second passing wheel (132) are arranged opposite to each other. The first passing wheel (131) is arranged at one end of the super lifting mast (11) close to the turntable (16), and the second passing wheel (132) is arranged at one end of the super lifting mast (11) close to the fixed pulley block (121). The third passing wheel (133) and the fourth passing wheel (134) are respectively connected to the main arm (15). The third passing wheel (133) and the fourth passing wheel (134) are arranged at intervals along the length direction of the main arm (15). The lifting wire rope (1361) of the lifting mechanism (136) is arranged to pass through the first pulley (131), the end of the super lifting mast (11), the second pulley (132), the third pulley (133) and the fourth pulley (134) in sequence. The movable pulley block (122) is located between the third pulley (133) and the fourth pulley (134) when being lowered, and the end of the lifting wire rope (1361) is connected to the movable pulley block (122). When the lifting wire rope (1361) is tightened, it can drive the movable pulley group (122) to move in a direction close to the pulling plate assembly (14).

3. The crawler crane according to claim 1, characterized in that: The traction device comprises a driving mechanism, which is connected to the main arm (15). After the movable pulley group (122) is connected to the driving mechanism, the driving mechanism can drive the movable pulley group (122) to move in a direction close to the pulling plate assembly (14).

4. The crawler crane according to claim 3, characterized in that: The driving mechanism comprises a sensor and a self-locking buckle, wherein the self-locking buckle is electrically connected to the sensor, and when the sensor detects that the movable pulley group (122) enters the range of the self-locking buckle, the self-locking buckle and the movable pulley group (122) are engaged to achieve automatic connection.

5. The crawler crane according to claim 1, characterized in that: The traction device comprises a first winch and a fourth pulley (134). The fourth pulley (134) is connected to the main arm (15). The first hoist is arranged between the turntable (16) of the crawler crane and the fourth pulley (134). When the movable pulley block (122) is lowered, it is located between the first hoist and the fourth pulley (134); the first steel wire rope of the first hoist passes around the fourth pulley (134) and is connected to the movable pulley block (122); tightening the first steel wire rope can drive the movable pulley block (122) to move in a direction close to the pull plate assembly (14); Or the traction device includes a second winch and a fourth wheel (134), the fourth wheel (134) is connected to the main arm (15), the second winch is arranged at one end of the main arm (15) close to the pull plate assembly (14), the fourth wheel (134) is arranged between the movable pulley group (122) and the second winch, the second steel wire rope of the second winch passes around the fourth wheel (134) and is connected to the movable pulley group (122), and when the second steel wire rope is tightened, it can drive the movable pulley group (122) to move in a direction close to the pull plate assembly (14).

6. The crawler crane according to claim 2 or 5, characterized in that: The main arm (15) comprises an upper chord (1511), a lower chord (1512) and a column, wherein the upper chord (1511) is arranged opposite to the lower chord (1512), and the column is fixedly connected between the upper chord (1511) and the lower chord (1512). One end of the fourth wheel (134) is fixedly connected to the upper chord (1511). When the other end of the fourth wheel (134) is connected to the column (1513), the fourth wheel (134) is arranged in the main arm (15); when the other end of the fourth wheel (134) is connected to the upper chord (1511), the fourth wheel (134) is arranged on the surface of the upper chord (1511), and the lifting wire rope (1361), the first wire rope or the second wire rope can be arranged around the fourth wheel (134).

7. The crawler crane according to any one of claims 1 to 5, characterized in that: The traction device comprises a counterweight mounting block (135), wherein the counterweight mounting block (135) is detachably connected to the main arm (15); when the movable pulley block (122) is connected to the counterweight mounting block (135), the counterweight mounting block is disassembled from the main arm (15); the movable pulley block (122) can move in a direction away from the fixed pulley block (121) under the action of the gravity of the counterweight mounting block (135); when the movable pulley block (122) moves to the same horizontal plane as the upper chord (1511) of the main arm (15), the counterweight mounting block (135) is connected to the main arm (15), and the counterweight mounting block (135) is disassembled from the movable pulley block (122).

8. The crawler crane according to claim 6, characterized in that: The counterweight installation block (135) is installed on the fourth arm section (151) of the main arm (15) before being connected to the movable pulley block (122); and the counterweight installation block (135) is installed on the fourth arm section (151) of the main arm (15) after being disassembled from the movable pulley block (122).

9. A method for using the crawler crane according to any one of claims 1 to 8, characterized in that: The method of use includes: The movable pulley block (122) of the super-lifting luffing pulley is moved toward a direction close to the main arm (15); The lifting wire rope (1361) of the lifting mechanism (136) is arranged to pass through the first pulley (131), the end of the super lifting mast (11), the second pulley (132), the third pulley (133) and the fourth pulley (134) in sequence; The movable pulley block (122) of the super-lifting variable-length pulley is connected to one end of a lifting wire rope (1361), and the lifting mechanism (136) tightens the lifting wire rope (1361) so that the lifting wire rope (1361) pulls the movable pulley block (122) toward the direction close to the pull plate assembly (14) to the connection point of the pull plate assembly (14); The movable pulley group (122) is connected to the pull plate assembly (14).

10. The method for using a crawler crane according to claim 9, characterized in that: Before the movable pulley block (122) is connected to the traction device, First, the superlift mast (11) is lowered toward the ground so that the movable pulley block (122) of the superlift luffing mechanism (18) is close to the counterweight mounting block (135) of the main arm (15); One end of the counterweight mounting block (135) is disassembled from the main arm (15) and connected to the movable pulley block (122); The other end of the counterweight installation block (135) is disassembled from the main arm (15), so that the counterweight installation block (135) is separated from the main arm (15); The superlift mast (11) is raised to move the superlift mast (11) in a direction away from the ground, and the distance between the movable pulley block (122) and the fixed pulley block (121) increases under the action of the gravity of the counterweight mounting block (135).

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