CN109553009B - Boom and boom dismounting method of crane - Google Patents
Boom and boom dismounting method of crane Download PDFInfo
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- CN109553009B CN109553009B CN201811505713.8A CN201811505713A CN109553009B CN 109553009 B CN109553009 B CN 109553009B CN 201811505713 A CN201811505713 A CN 201811505713A CN 109553009 B CN109553009 B CN 109553009B
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 31
- 239000010959 steel Substances 0.000 claims description 31
- 230000001105 regulatory effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 125000003003 spiro group Chemical group 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C2700/00—Cranes
- B66C2700/03—Cranes with arms or jibs; Multiple cranes
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Abstract
The invention relates to the technical field of cranes, in particular to a boom and a boom dismounting method of a crane. The arm support comprises a plurality of hinge seats and a plurality of arm sections, each hinge seat comprises a fixing part and a hinge part connected to the fixing part, the fixing part is connected to one end of a lower chord of each arm section, the hinge part is arranged on the lower side of the lower chord and extends downwards from one end of the lower chord to the adjacent end of the lower chord of the adjacent arm section, hinge holes are formed in the hinge part, the hinge part can synchronously rotate along with the rotation of the lower chord around a hinge shaft, so that the central axis of each hinge hole and the central axis of the hinge hole of the hinge part at the adjacent end of the lower chord of the adjacent arm section can be switched between a first state parallel to each other and a second state overlapped with each other, and the adjacent two hinge seats can be hinged through hinge parts penetrating through the two hinge holes in the second state. The arm support can enable the lower chords of two adjacent arm sections to be connected in a hinged mode through the hinged base.
Description
Technical Field
The invention relates to the technical field of cranes, in particular to a boom and a boom dismounting method of a crane.
Background
A crane is a multi-action crane that vertically lifts and horizontally carries a heavy object within a certain range. The crane boom is an important device on a crane, and is mainly used for supporting the hoisting weight of a container and enabling a loading bridge to have certain hoisting height and width. The crane boom is composed of a plurality of boom sections, and each boom section is detachably connected with the other boom section so as to realize the disassembly and assembly of the boom sections.
However, the upper chord joints of two adjacent arm sections of the crane are hinged through the hinge shaft, and the lower chord joints of the two adjacent arm sections are fixedly installed through the pin shaft connection or the bolt connection and other connection modes, so that the lower chord joints of the two adjacent arm sections have no lower hinge point, the upper chord joints of the arm sections to be disassembled cannot rotate around the lower hinge point when the arm sections are disassembled, the problems that the arm sections to be disassembled are not stable in movement and steel wire ropes are wound easily in the process that the original horizontal installation state is moved to be a vertical hanging state are caused, and the disassembly efficiency is low.
Disclosure of Invention
The invention aims to solve the problem that the joint of the lower chord members of two adjacent arm sections of the crane in the prior art is fixedly installed, so that the arm section to be disassembled cannot be stably converted into a vertical hanging state during disassembly, and provides an arm support and an arm support disassembling method of the crane.
In order to achieve the above object, the present invention provides, in one aspect, an arm support including a plurality of hinge seats and a plurality of arm sections linearly arranged, upper chords of two adjacent arm sections are hinged by a hinge shaft, lower chords of two adjacent arm sections are detachably connected, each hinge seat includes a fixing portion and a hinge portion connected to the fixing portion, the fixing portion is connected to one end of the lower chord of each arm section, the hinge portion is disposed at a lower side of the lower chord and extends from one end of the lower chord to an adjacent end of the lower chord of the adjacent arm section in a downward inclination manner, a hinge hole is formed in the hinge portion, the hinge portion is configured to rotate synchronously with the rotation of the lower chord around the hinge shaft, so that a central axis of the hinge hole and a central axis of a hinge hole of a hinge portion at an adjacent end of the lower chord of the adjacent arm section are in a first state parallel to each other and a second state overlapping each other And switching between the states, wherein two adjacent hinge seats can be hinged by a hinge piece passing through the two hinge holes in the second state.
Preferably, the fixing part includes a connecting member, a connecting plate and a fixing plate connected to the hinge part, the fixing plate is configured to be capable of abutting against a bottom surface of the lower chord, the connecting plate is configured to be capable of being supported on a top surface of the lower chord, and the fixing plate and the connecting plate are detachably connected by the connecting member.
Preferably, the middle part of the fixing plate is supported on the lower chord and both sides of the fixing plate are respectively formed with first mounting holes, the middle part of the connecting plate abuts against the lower chord and both sides of the connecting plate are respectively formed with second mounting holes, and the connecting member includes fastening members for being respectively disposed at both sides of the lower chord, the fastening members passing through the first mounting holes and fixing the fixing plate and the connecting plate.
Preferably, the hinge part is provided as a flat plate having one end vertically connected to the fixing plate and the other end formed with the hinge hole.
Preferably, the hinge portion comprises two flat plates which are arranged in parallel and keep a spacing, and central axes of hinge holes of the two flat plates are coincident.
Preferably, the arm support comprises an adjusting structure, the adjusting structure comprises an adjusting rod, a baffle and a fixing piece, the baffle and the fixing piece are arranged on the upper side of the upper chord, the fixing piece and the baffle are respectively fixed on the fixing portions of two adjacent hinging seats, one end of the adjusting rod is movably connected with the fixing piece, the other end of the adjusting rod is stopped on the baffle, and the adjusting rod extends along the length direction of the lower chord and is movably adjustable along the extending direction of the adjusting rod.
Preferably, adjust the pole and establish to the screw rod, the mounting include with screw rod spiro union's nut and fixed connection in the regulating plate of fixed part, the regulating plate is along the perpendicular to the extending direction setting of screw rod, the nut is fixed on the regulating plate, the one end of screw rod passes in proper order the regulating plate nut and backstop in the baffle.
Preferably, the baffle is arranged along a direction perpendicular to the extending direction of the screw; and/or the hinge is provided with a connecting pin shaft.
According to a second aspect of the invention, the crane comprises a crane body, a hoisting mechanism, an arm dismounting device and the arm support, wherein the arm support comprises n arm sections which are linearly arranged, a head-end arm section of the arm support is set as a first arm section, a tail-end arm section of the arm support is set as an nth arm section, a first hinge seat is installed at the head end of a lower chord of the nth arm section, the first hinge seat comprises a first hinge part with a first hinge hole, a second hinge seat is installed at the tail end of a lower chord of the (n-1) th arm section, a second hinge hole is formed in the second hinge seat, the crane body is respectively detachably connected with the first arm section and the hoisting mechanism, and the hoisting mechanism comprises a steel wire rope for hanging each arm section;
the arm support disassembling method comprises the following steps:
s1, detaching the connection between the lower chord of the nth arm section and the lower chord of the (n-1) th arm section, and actuating the lower chord of the nth arm section to rotate around the hinge shaft between the upper chord of the nth arm section and the upper chord of the (n-1) th arm section so as to drive the first hinge part to synchronously rotate along with the lower chord of the nth arm section until the central axis of the first hinge hole is coincident with the central axis of the second hinge hole;
s2, penetrating the hinge piece through the first hinge hole and the second hinge hole to enable the lower chord of the nth arm section to be hinged with the lower chord of the (n-1) th arm section;
s3, mounting an arm detaching device above the tail end of the upper chord of the (n-1) th arm section, enabling a steel wire rope of the hoisting mechanism to bypass the arm detaching device and be fixed on the nth arm section, and adjusting the steel wire rope to be in a tight state;
s4, removing a hinged shaft between the upper chord of the nth arm section and the upper chord of the (n-1) th arm section, and simultaneously, opening the hoisting mechanism to enable the nth arm section to rotate downwards around the hinged member under the action of the tensile force of the steel wire rope and enable the steel wire rope to be in a tight state all the time until the tail end of the nth arm section faces downwards, and installing a fixing piece on the upper chord of the nth arm section to limit the steel wire rope;
s5, detaching the hinged piece to enable the lower chord of the nth arm section to be separated from the lower chord of the (n-1) th arm section;
and S6, hanging and descending the nth arm section to the ground through the steel wire rope.
Preferably, the crane includes an arm detaching assembly and a rope supporting assembly, the arm detaching assembly is disposed above an upper chord of an arm section between the arm section to be detached and the first arm section of the crane boom, the rope supporting assembly is disposed above an upper chord of an arm section between the arm section to be detached and the arm detaching assembly of the crane boom, and in step S3, the steel wire rope of the hoisting mechanism sequentially bypasses the arm detaching assembly, the rope supporting assembly and the arm detaching device.
According to the technical scheme, the invention provides the arm support and the arm support dismounting method of the crane, the arm support can connect the hinge base to the side face of the lower chord of the arm section, so that powerful support is provided for the lower chord of two adjacent arm sections in a hinge connection mode, the structure is simple, and the installation is convenient.
Drawings
FIG. 1 is a schematic structural diagram of a crane boom provided by the present invention in a working state;
FIG. 2 is an enlarged schematic view of portion A shown in FIG. 1;
FIG. 3 is a schematic structural diagram of an initial hinge point established by the lower chords of two adjacent boom sections of the crane boom provided by the present invention;
fig. 4 is an enlarged schematic view of a portion B shown in fig. 3;
fig. 5 is a schematic structural diagram of a crane boom in which after a hinge point is established between lower chords of two adjacent boom sections of the crane boom, a boom section to be detached is fixed by a hoisting steel wire rope;
fig. 6 is a schematic structural diagram of a crane boom in which after a hinge point is established between lower chords of two adjacent boom sections, a boom section to be detached rotates around the hinge point and falls;
fig. 7 is a schematic structural diagram of a vertical falling of an arm section to be disassembled under the hanging action of a lifting steel wire rope after a hinge point of the lower chord members of two adjacent arm sections of the crane arm support is disassembled.
Description of the reference numerals
1. A hinge portion; 2. a fixed part; 3. an articulation member; 4. a connecting plate; 5. a fixing plate; 6. an adjustment structure; 7. the (n-1) th arm section; 8. the nth arm section; 9. a wire rope; 10. disassembling the arm device; 11. a first hinge portion; 12. a first hinge hole; 13. a first fixed part; 14. a baffle plate; 16. a lower chord of the nth arm section; 21. a second hinge portion; 22. a second hinge hole; 23. a second fixed part; 24. adjusting a rod; 25. an adjusting plate; 26. the lower chord of the (n-1) th arm section; 27. and a nut.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
According to a first aspect of the present invention, there is provided a boom, as shown in fig. 1 to 5, the boom comprises a plurality of hinge seats and a plurality of arm sections arranged linearly, upper chords of two adjacent arm sections are hinged by a hinge shaft, lower chords of two adjacent arm sections are detachably connected, each hinge seat comprises a fixed part 2 and a hinge part 1 connected to the fixed part 2, the fixed part 2 is connected to one end of the lower chord of each arm section, the hinge part 1 is arranged at a lower side of the lower chord and extends from one end of the lower chord to an adjacent end of the lower chord of the adjacent arm section in a downward inclination manner, a hinge hole is formed on the hinge part 1, the hinge part 1 is configured to rotate synchronously with the rotation of the lower chord around the hinge shaft, so that a central axis of the hinge hole can be parallel to a central axis of the hinge shaft of the hinge hole of the hinge part 1 at the adjacent end of the lower chord of the adjacent arm section The hinge seat can be hinged by a hinge 3 passing through the two hinge holes in the second state. Specifically, every arm section includes a pair of lower chord and a pair of upper chord, and is a pair of lower chord is parallel to each other and keeps the interval and through an intermediate strut beam fixed connection, and is a pair of lower chord is parallel to each other and keeps the interval and through intermediate strut fixed connection, and every upper chord of every arm section is connected through the articulated joint with the upper chord of adjacent arm section that corresponds the setting with this upper chord respectively, is provided with articulated seat on every lower chord of every arm section respectively to make every lower chord of every arm section articulate through the articulated joint with the lower chord of adjacent arm section that corresponds the setting with this lower chord respectively, thereby realized adjacent two lower chord detachably of the corresponding setting of arm section connects.
According to the technical scheme, the invention provides the arm support and the arm support dismounting method of the crane, the arm support can connect the hinge base to the side face of the lower chord of the arm section, so that powerful support is provided for the lower chord of two adjacent arm sections in a hinge connection mode, the structure is simple, and the installation is convenient.
Further, fixed part 2 include connecting piece, connecting plate 4 and with fixed plate 5 that articulated portion 1 is connected, fixed plate 5 sets up to supporting the bottom surface of lower chord, connecting plate 4 sets up to being used for supporting the top surface of lower chord, and fixed plate 5 with connecting plate 4 passes through connecting piece detachably connects, and convenient to detach and equipment are favorable to adopting nonrotatable connected mode (for example, through bolted connection, perhaps, but can not rotate through the round pin hub connection) to connect in order to improve original arm section structure for adopting articulated mode between the lower chord with the basis of original arm section structure on the direct mount, have improved the dismantlement security of current arm section structure, simple structure, it is with low costs.
In order to simplify the structure and the disassembly and assembly operation of the fixing part 2, and to improve the recycling rate and reduce the cost of the connecting member, the connecting member may employ a fastening member. For example, the middle portion of the fixing plate 5 is supported on the lower chord and both sides of the fixing plate 5 are respectively formed with first mounting holes, the middle portion of the connecting plate 4 abuts against the lower chord and both sides of the connecting plate 4 are respectively formed with second mounting holes, and the connecting member includes fasteners for being respectively disposed at both sides of the lower chord, the fasteners passing through the first mounting holes and fixing the fixing plate 5 and the connecting plate 4. Wherein the fastener may be provided as a bolt and nut assembly.
As shown in fig. 2 and 4, the hinge portion 1 is a flat plate, one end of the flat plate is vertically connected to the fixing plate 5, and the other end of the flat plate is provided with the hinge holes, so that the mounting positions of the hinge seats between the lower chords of the adjacent arm sections can be conveniently designed and observed, the hinge holes of the hinge seats mounted on the lower chords of the adjacent arm sections can be switched from the first state to the second state more accurately, the hinge stability between the two adjacent hinge seats is improved, and the hinge seat is safe and reliable.
Furthermore, the hinge portion 1 comprises two flat plates which are arranged in parallel and keep an interval, the central axes of the hinge holes of the two flat plates are overlapped, so that the hinge stability between the two hinge seats is further improved, and the relative rotation between the two adjacent arm sections around the hinge piece can be more stable.
According to the invention, in the existing crane boom, two adjacent boom sections can be connected through a pin shaft but cannot rotate, wherein one end of the pin shaft is fixedly connected to the end surface of the lower chord of one boom section, the adjacent connecting end of the lower chord of the adjacent boom section is provided with a mounting hole, and the other end of the pin shaft can be accommodated in the mounting hole for limiting, so that the lower chord of the boom section can be detachably connected with the adjacent connecting end of the lower chord of the adjacent boom section through the pin shaft. When the arm support is used for carrying out overhead arm dismantling operation, in order to enable the lower chord member between two adjacent arm sections to be convenient to dismantle, namely, a pin shaft connected to the end face of the lower chord member of one of the arm sections can be quickly and stably moved out of a mounting hole of an adjacent connecting end of the lower chord member of the adjacent arm section, the arm support further comprises an adjusting structure 6 for assisting in moving out the pin shaft. For example, the arm support comprises an adjusting structure 6, the adjusting structure 6 comprises an adjusting rod 24, and a baffle plate 14 and a fixing member which are arranged on the upper side of the upper chord, the fixing member and the baffle plate 14 are respectively fixed on the fixing portions 2 of two adjacent hinge seats, one end of the adjusting rod 24 is movably connected with the fixing member, the other end of the adjusting rod 24 is stopped at the baffle plate 14, and the adjusting rod 24 extends along the length direction of the lower chord and is movably adjustable along the extending direction of the adjusting rod 24. During the use, through adjusting the pole and moving along the direction towards baffle 14, increase the relative distance between mounting and the baffle 14, and then adjust and keep away from each other between the lower chord of two adjacent arm sections to the round pin axle of connecting on the terminal surface of the lower chord of one of them arm section moves out from the mounting hole of the adjacent link of the lower chord of adjacent arm section.
In order to compromise use cost and operation convenience, adjust pole 24 and establish to the screw rod, the mounting include with screw rod spiro union's nut 27 and fixed connection in the regulating plate 25 of fixed part 2, the regulating plate 25 is along the perpendicular to the extending direction setting of screw rod, nut 27 is fixed on the regulating plate 25, the one end of screw rod is passed in proper order the regulating plate 25 nut 27 and backstop in baffle 14, the handling ease and preparation, easy operation. When the adjustable bolt is used, the nut 27 is clamped by a wrench and is driven to rotate, so that the nut and the adjusting rod are relatively displaced along the length direction of the adjusting rod, and cannot relatively move with the fixing part due to the fact that the nut is fixedly connected with the fixing part through the adjusting plate 25, the adjusting rod and the fixing part are relatively moved, for example, the adjusting rod (namely, a screw rod) moves along the direction towards the baffle 14, one end of the screw rod is stopped by the baffle, the baffle further moves along the direction away from the adjusting plate 25 under the pushing action of the screw rod, the end parts of the lower chords of two adjacent arm sections are separated from each other, and namely, a pin shaft connected to the end surface of the lower chord of one arm section is moved out of the mounting hole of the adjacent connecting end of the lower chord of the adjacent arm section. The fixing member may be configured to have various reasonable structures, for example, the fixing member may be configured to have a flat plate structure having a screw hole in which the screw rod is screwed.
Furthermore, the baffle 14 is arranged along the direction perpendicular to the extending direction of the screw rod, so that the screw rod can be stopped on the baffle 14 more stably, and the matching stability of the adjusting rod and the baffle in the moving process of the adjusting rod is improved.
Furthermore, articulated elements 3 establish to connecting pin axle, simple structure, convenient to detach and installation, and is with low costs. For example, the hinge member 3 includes a cotter pin and a pin shaft having a mounting hole radially formed at an end thereof, the pin shaft penetrates through the two hinge holes in the second state and the end thereof is stopped by the cotter pin, so that the structure is simple, the pin shaft is prevented from being axially displaced when the lower chords of the adjacent arm sections rotate relatively, and the safety and reliability are achieved.
The invention provides a method for disassembling an arm support of a crane, as shown in fig. 1-7, the crane comprises a crane body, a hoisting mechanism, an arm disassembling device 10 and the arm support, the arm support comprises n arm sections which are linearly arranged, a head end arm section of the arm support is set as a first arm section, a tail end arm section of the arm support is set as an nth arm section 8, a first hinged seat is installed at the head end of a lower chord 16 of the nth arm section 8, the first hinged seat comprises a first hinged part 11 formed with a first hinged hole 12, a second hinged seat is installed at the tail end of a lower chord 26 of the (n-1) arm section 7, a second hinged hole 22 is formed on the second hinged seat, the crane body is detachably connected with the first arm section and the hoisting mechanism respectively, and the hoisting mechanism comprises a steel wire rope 9 for hanging each arm section; of course, as shown in fig. 2 and 4, the first hinge base includes a first fixing portion 13 for fixing to a side surface of the lower chord 16 of the nth arm section 8 adjacent to the head end, the second hinge base includes a second fixing portion 23 for fixing to a side surface of the lower chord 26 of the (n-1) th arm section 7 adjacent to the tail end, the second hinge base includes a second hinge portion 21 connected to the second fixing portion 23, and the second hinge portion 21 is formed with a second hinge hole;
the arm support disassembling method comprises the following steps:
s1, detaching the connection between the lower chord 16 of the n-th arm section 8 and the lower chord of the n-1-th arm section 7, and actuating the lower chord 16 of the n-th arm section 8 to rotate around the hinge shaft between the upper chord of the n-th arm section 8 and the upper chord of the n-1-th arm section 7, so as to drive the first hinge joint 11 to synchronously rotate along with the lower chord 16 of the n-th arm section 8 until the central axis of the first hinge hole 12 coincides with the central axis of the second hinge hole 22; according to an embodiment of the present invention, initially, the lower chord 16 of the n-th arm section 8 and the lower chord of the n-1-th arm section 7 are in a pin connection state as shown in fig. 1 and 2, and as the lower chord 16 of the n-th arm section 8 rotates around the hinge axis between the upper chord of the n-th arm section 8 and the upper chord of the n-1-th arm section 7, the first hinge hole and the second hinge hole are driven to switch from the first state as shown in fig. 1 and 2 to the second state as shown in fig. 3 and 4, and at the same time, the lower chord 16 of the n-th arm section 8 and the lower chord of the n-1-th arm section 7 are in a separated state as shown in fig. 3 and 4;
s2, penetrating the hinge member 3 through the first hinge hole 12 and the second hinge hole 22, so that the lower chord 16 of the nth arm section 8 is hinged with the lower chord of the (n-1) th arm section 7;
s3, as shown in fig. 5, installing the arm detaching device 10 above the end of the upper chord of the (n-1) th arm section 7, making the steel cable 9 of the hoisting mechanism bypass the arm detaching device 10 and fixed on the n-th arm section 8, and adjusting the steel cable 9 to be in a tight state;
s4, removing a hinged shaft between an upper chord of the n-th arm section 8 and an upper chord of the n-1-th arm section 7, and simultaneously, opening the hoisting mechanism to enable the n-th arm section 8 to rotate downwards around the hinged part 3 under the action of the tensile force of the steel wire rope 9 and enable the steel wire rope 9 to be in a tight state all the time until the tail end of the n-th arm section 8 is downward, installing a fixing part on the upper chord of the n-th arm section 8 to limit the steel wire rope 9, so that the n-th arm section 8 in the S6 can be more stably lowered to the ground under the hanging of the steel wire rope 9, and the conditions that the n-th arm section 8 rotates or winds the steel wire rope and the like in the lowering process are avoided; further, as shown in fig. 6, the nth arm segment 8 may rotate downward by any reasonable angle as long as it is ensured that the end of the position of the nth arm segment 8 is downward, and the nth arm segment 8 rotates downward by 90 °;
s5, detaching hinge 3 to make lower chord 16 of nth arm section 8 separate from lower chord 26 of n-1 arm section 7;
s6, as shown in fig. 7, the nth arm segment 8 is suspended and lowered to the ground by the wire rope 9.
Further, the crane comprises an arm disassembling assembly and a rope supporting assembly, the arm disassembling assembly is arranged above an upper chord of an arm section between the arm section to be disassembled and the first arm section of the crane arm frame, the rope supporting assembly is arranged above an upper chord of an arm section between the arm section to be disassembled and the crane arm frame, and in the step S3, the steel wire rope 9 of the hoisting mechanism sequentially bypasses the arm disassembling assembly, the rope supporting assembly and the arm disassembling device 10. For example, the arm disassembling assembly, the rope supporting assembly and the arm disassembling device are all set to be in a fixed pulley structure, specifically, the arm disassembling assembly, the rope supporting assembly and the arm disassembling device all comprise a pulley and a pulley support, one end of the pulley support is fixed on the upper chord and extends upwards, the other end of the pulley support is used for being rotatably connected with the pulley, and the steel wire rope is wound on the pulley. Furthermore, the crane comprises a tensioning device, the tensioning device is arranged on a lower chord of the arm support between the arm disassembling assembly and the arm disassembling device, and the steel wire rope is wound on the tensioning device, so that the steel wire rope can be adjusted to be always in a tight state, namely a tensioning state.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications may be made to the technical solution of the invention, and in order to avoid unnecessary repetition, various possible combinations of the invention will not be described further. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (9)
1. The arm support is characterized by comprising a plurality of hinge seats and a plurality of arm sections which are linearly arranged, wherein the upper chords of two adjacent arm sections are hinged through a hinge shaft, the lower chords of two adjacent arm sections are detachably connected, each hinge seat comprises a fixing part (2) and a hinge part (1) connected to the fixing part (2), the fixing part (2) is connected to one end of the lower chord of each arm section, the hinge part (1) is arranged on the lower side of the lower chord and extends downwards from one end of the lower chord to the adjacent end of the lower chord of the adjacent arm section, hinge holes are formed in the hinge part (1), the hinge part (1) can synchronously rotate along with the rotation of the lower chord around the hinge shaft, so that the central axis of each hinge hole can be level with the central axis of the hinge hole of the hinge part (1) at the adjacent end of the lower chord of the adjacent arm section The row is switched between a first state and a second state which are overlapped with each other, and two adjacent hinge seats can be hinged through a hinge piece (3) penetrating through two hinge holes in the second state; the arm support comprises an adjusting structure (6), the adjusting structure (6) comprises an adjusting rod (24), a baffle (14) and a fixing piece, the baffle (14) and the fixing piece are arranged on the upper side of the upper chord, the fixing piece and the baffle (14) are respectively fixed on the fixing portions (2) of two adjacent hinging seats, one end of the adjusting rod (24) is movably connected with the fixing piece, the other end of the adjusting rod is stopped on the baffle (14), and the adjusting rod (24) extends along the length direction of the lower chord and is movably adjustable along the extending direction of the adjusting rod (24).
2. The boom according to claim 1, characterized in that the fixed part (2) comprises a connecting piece, a connecting plate (4) and a fixing plate (5) connected with the hinge part (1), the fixing plate (5) is arranged to abut against the bottom surface of the lower chord, the connecting plate (4) is arranged to be supported on the top surface of the lower chord, and the fixing plate (5) and the connecting plate (4) are detachably connected through the connecting piece.
3. The boom according to claim 2, characterized in that the middle of the fixed plate (5) is supported on the lower chord and two sides of the fixed plate (5) are respectively formed with a first mounting hole, the middle of the connecting plate (4) is abutted against the lower chord and two sides of the connecting plate (4) are respectively formed with a second mounting hole, the connecting member comprises a fastener for being respectively disposed at two sides of the lower chord, the fastener passes through the first mounting hole and fixes the fixed plate (5) and the connecting plate (4).
4. The boom according to claim 3, characterized in that the hinge part (1) is provided as a flat plate, one end of which is vertically connected to the fixed plate (5) and the other end of which is formed with the hinge hole.
5. The boom according to claim 4, characterized in that the hinge (1) comprises two plates arranged in parallel and kept spaced apart, the central axes of the hinge holes of the two plates coinciding.
6. The boom support according to any one of claims 1-5, characterized in that the adjusting rod (24) is a screw, the fixing member comprises a nut (27) screwed with the screw and an adjusting plate (25) fixedly connected to the fixing portion (2), the adjusting plate (25) is arranged along a direction perpendicular to the extension direction of the screw, the nut (27) is fixed on the adjusting plate (25), and one end of the screw passes through the adjusting plate (25), the nut (27) and stops at the baffle (14) in sequence.
7. The boom according to claim 6, characterized in that the baffles (14) are arranged perpendicular to the extension direction of the screw;
and/or the hinge piece (3) is arranged as a connecting pin shaft.
8. A method for disassembling an arm support of a crane, which is characterized in that the crane comprises a crane body, a hoisting mechanism, an arm disassembling device (10) and the arm support according to any one of claims 1 to 7, the arm support comprises n arm sections which are linearly arranged, a head end arm section of the arm support is set as a first arm section, a tail end arm section of the arm support is set as an n arm section (8), the n arm section (8) is an arm section to be disassembled, a first hinge seat is installed at the head end of a lower chord (16) of the n arm section (8), the first hinge seat comprises a first hinge part (11) formed with a first hinge hole (12), a second hinge seat is installed at the tail end of a lower chord (26) of the n-1 arm section (7), a second hinge hole (22) is formed on the second hinge seat, and the crane body is detachably connected with the first arm section and the hoisting mechanism respectively, the hoisting mechanism comprises a steel wire rope (9) for hanging each arm section;
the arm support disassembling method comprises the following steps:
s1, detaching the connection between the lower chord (16) of the nth arm section (8) and the lower chord of the (n-1) arm section (7), and actuating the lower chord (16) of the nth arm section (8) to rotate around the hinge shaft between the upper chord of the nth arm section (8) and the upper chord of the (n-1) arm section (7) so as to drive the first hinge part (11) to synchronously rotate along with the lower chord (16) of the nth arm section (8) until the central axis of the first hinge hole (12) is coincident with the central axis of the second hinge hole (22);
s2, penetrating the hinge piece (3) through the first hinge hole (12) and the second hinge hole (22) so that the lower chord (16) of the nth arm section (8) is hinged with the lower chord of the (n-1) th arm section (7);
s3, mounting the arm detaching device (10) above the tail end of the upper chord of the (n-1) th arm section (7), enabling a steel wire rope (9) of the hoisting mechanism to bypass the arm detaching device (10) and be fixed on the n-1 th arm section (8), and adjusting the steel wire rope (9) to be in a tight state;
s4, removing a hinged shaft between the upper chord of the nth arm section (8) and the upper chord of the (n-1) th arm section (7), simultaneously, opening the hoisting mechanism to enable the nth arm section (8) to rotate downwards around the hinged part (3) under the action of the tensile force of a steel wire rope (9) and enable the steel wire rope (9) to be in a tight state all the time until the tail end of the nth arm section (8) is downward, and installing a fixing piece on the upper chord of the nth arm section (8) to limit the steel wire rope (9);
s5, detaching the hinge (3) to enable the lower chord (16) of the nth arm section (8) to be separated from the lower chord (26) of the (n-1) th arm section (7);
and S6, hanging and descending the nth arm section (8) to the ground through the steel wire rope (9).
9. The method of disassembling the boom of a crane according to claim 8, wherein the crane comprises an arm disassembling assembly and a rope supporting assembly, the arm disassembling assembly is arranged above the upper chord of the boom section of the crane between the boom section to be disassembled and the first boom section, the rope supporting assembly is arranged above the upper chord of the boom section of the crane between the boom section to be disassembled and the arm disassembling assembly, and in step S3, the steel wire rope (9) of the hoisting mechanism is sequentially passed around the arm disassembling assembly, the rope supporting assembly and the arm disassembling device (10).
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| CN111516925A (en) * | 2020-05-12 | 2020-08-11 | 湖南中联重科建筑起重机械有限责任公司 | Tower crane arm section, arm section packaging structure and packaging method |
| CN112830400B (en) * | 2021-02-01 | 2023-06-13 | 浙江三一装备有限公司 | Crawler crane and crane transportation method |
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| GB985543A (en) * | 1962-10-23 | 1965-03-10 | Boilot Petolat Ets | An improved tower crane and a method for erecting and dismantling such a crane |
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| CN109553009A (en) | 2019-04-02 |
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