CN114084816A - Counterweight arm cutting device and arm cutting process of tower crane - Google Patents
Counterweight arm cutting device and arm cutting process of tower crane Download PDFInfo
- Publication number
- CN114084816A CN114084816A CN202111339486.8A CN202111339486A CN114084816A CN 114084816 A CN114084816 A CN 114084816A CN 202111339486 A CN202111339486 A CN 202111339486A CN 114084816 A CN114084816 A CN 114084816A
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- Prior art keywords
- jib
- base
- section
- mounting
- tower crane
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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
- B66C23/18—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 specially adapted for use in particular purposes
- B66C23/26—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 specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
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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
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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
Abstract
The utility model relates to a counter weight of tower crane cuts arm device and cuts arm technology belongs to the building engineering field, and it includes supporting component and installs the guide pulley on supporting component, supporting component is including being used for installing the base on becoming the width of cloth dolly, it has the jib that is used for extending to wait to tear a section top open to articulate on the base, still install the bracing piece that is used for supporting the jib on the base, bracing piece one end articulates on the jib, the bracing piece other end can be dismantled the support on the base, guide pulley installs the one end of keeping away from the base in the jib. This application has the effect of the tower crane of being convenient for is dismantled.
Description
Technical Field
The application relates to the field of constructional engineering, in particular to a counterweight arm cutting device and an arm cutting process of a tower crane.
Background
A tower crane is also called a tower crane, and a movable arm is arranged on a rotary crane at the upper part of a high-rise tower body. The tower crane has large operation space and is mainly used for vertical and horizontal conveying of materials and installation of building components in building construction.
At present, in the process of disassembling a common tower crane, firstly, a tower crane is lowered to a primary assembly height by gradually disassembling a standard section at the upper end of a tower body; then, a truck crane is used for dismantling the balancing weights, and only one balancing weight is reserved to keep the balance of the machine body; then the whole crane boom is disassembled through a truck crane and hoisted to a preset position; then hanging the last balancing weight; finally, sequentially dismantling the balance arm, the tower top cab, the rotary joint and the residual standard knot by using a truck crane; and finishing the dismantling of the tower crane.
In view of the above-mentioned related art, the inventor believes that if there are many buildings around the position where the tower crane is installed, the crane boom is difficult to descend to the initial installation height under the restriction of surrounding obstacles, and the use of the above-mentioned disassembling method is limited.
Disclosure of Invention
In order to facilitate the disassembly of the tower crane, the application provides a counterweight arm cutting device and an arm cutting process of the tower crane.
First aspect, the application provides a counter weight of tower crane cuts arm device adopts following technical scheme:
the utility model provides a counter weight of tower crane cuts arm device, includes supporting component and installs the guide pulley on supporting component, supporting component is including being used for installing the base on becoming width of cloth dolly, it has the jib that is used for extending to wait to tear a section top open to articulate on the base, still install the bracing piece that is used for supporting the jib on the base, bracing piece one end articulates on the jib, the bracing piece other end can be dismantled the support on the base, guide pulley installs the one end of keeping away from the base in the jib.
Through adopting the above-mentioned technical scheme, when the arm cutting device is installed on the installation festival, set up the guide pulley in the top of waiting to tear the festival open through supporting component, be convenient for to pass through the guide pulley and connect in waiting to tear the festival open in the wire rope of hoist engine, it waits to tear the festival open to drive the stay cord pulling when the hoist engine rolling, it receives ascending pulling force to wait to tear the festival open, the gravity of festival self is waited to tear open in the balance, the staff of being convenient for removes to wait to tear open and is connected between festival and the installation festival, then will dismantle the waiting of getting off the festival and release to ground through the hoist engine, thereby the length of jib loading boom has been cut, the decline of the jib loading boom of being convenient for, thereby the dismantlement of the tower crane of being convenient for.
Optionally, the supporting components are provided with two groups, two groups of supporting components are used for being installed on two sides of the installation section, a connecting rod is installed between the two hanging rods, the connecting rod is located at one end, far away from the base, of the hanging rods, and the guide pulleys are installed on the connecting rod.
Through adopting above-mentioned technical scheme, strengthened the structural strength who cuts the arm device through two sets of supporting components, strengthened the stability of cutting the arm device.
Optionally, one end of the support rod far away from the hinge point of the suspender is hinged with a sliding part, the sliding part is arranged on the base in a sliding manner, the sliding direction of the sliding part is parallel to the length direction of the installation section, a fixing part is arranged on the sliding part, and the sliding part is detachably fixed on the base through the fixing part.
Through adopting above-mentioned technical scheme, through the displacement of sliding block restriction support piece, reduced support piece and broken away from the base, can not support the risk of jib.
Optionally, the support assembly further comprises a pushing member for providing a pushing force, the pushing member comprises a sleeve portion and a push rod portion connected to the sleeve portion in a sliding manner, the sleeve portion is hinged to the support rod, and the push rod portion is hinged to the suspension rod.
By adopting the technical scheme, after the base is installed on the amplitude-variable trolley by a worker, the pushing piece is started to push the supporting rod and the suspender to be away from each other. The sliding piece slides from one end close to the roller to the direction far away from the roller, and the hanging rod and the supporting rod are propped open. The arm cutting device is convenient for workers to install, and the installation efficiency of the workers is improved.
Optionally, one end of the base, which is far away from the amplitude variation trolley, is provided with a safety rope for connecting a wire-dropping rod.
Through adopting above-mentioned technical scheme, keep away from the one end of becoming width of cloth dolly through the safety rope and connect on the lower chord, strengthened the security of cutting the arm device.
Optionally, one end of the base, which is far away from the amplitude variation trolley, is provided with a roller for rolling contact with the lower chord.
Through adopting above-mentioned technical scheme, support on the lower chord through the gyro wheel, make the whole equilibrium that keeps of base, strengthened the stability of cutting the arm device.
Optionally, the mounting is the bolt, the bolt can be dismantled and wear to locate the sliding part, the one end that the jib was kept away from to the base is provided with the fixed orifices that supplies bolt threaded connection.
Through adopting above-mentioned technical scheme, bolted connection intensity is high, stable in structure, and easy dismounting has improved staff's work efficiency.
Optionally, at least one reinforcing rod is installed between the two hanging rods, and two ends of the reinforcing rod are respectively and fixedly connected to the two hanging rods.
Through adopting above-mentioned technical scheme, strengthened the connection between two sets of supporting components, strengthened the stability of cutting the arm device.
Optionally, at least one reinforcing rod is arranged through the mounting section.
Through adopting above-mentioned technical scheme, cut the risk that the arm device breaks away from the installation festival in reducing, strengthened the security of cutting the arm device.
In a second aspect, the present application provides an arm cutting process, which adopts the following technical scheme:
the arm cutting process comprises the following operation steps:
s1, hanging the arm cutting device on a balance arm of the tower crane from the ground;
s2, moving the amplitude variation trolley to one end of the crane boom close to the tower body;
s3, mounting the two bases on an amplitude variation trolley;
s4, moving the amplitude variation trolley to one end of the mounting joint close to the joint to be disassembled and fixing;
s5, mounting a reinforcing rod on two third mounting seats, then driving a pushing piece, mounting a connecting rod and another reinforcing rod step by step, enabling a steel wire rope connected with a winch to bypass a guide pulley and be fixed on a section to be dismounted, and fixing a sliding piece on a base through a bolt to complete the mounting of the arm cutting device;
s6, starting the winch to tighten the pull rope, and balancing the gravity of the section to be disassembled by the upward pull force of the section to be disassembled;
s7, removing the pin shaft between the to-be-detached section and the mounting section to disassemble the to-be-detached section and the mounting section;
s8, lowering the section to be disassembled to the ground through a winch;
and S9, detaching the connecting rod and the two reinforcing rods, moving the luffing trolley to the arm support adjacent to the mounting section, reassembling the arm cutting device, changing the mounting section into a new section to be detached, changing the arm support where the luffing trolley is located into a new mounting section, and repeating S6-S8 until surrounding buildings do not influence the descending of the crane arm.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the guide pulley is arranged above the section to be disassembled through the support assembly, so that a steel wire rope connected to the winch is conveniently connected to the section to be disassembled through the guide pulley, and a worker can conveniently remove the connection between the section to be disassembled and the installation section, so that the length of the crane boom is cut off, the crane boom is convenient to descend, and the tower crane is convenient to disassemble;
2. the arm cutting device is convenient for workers to install, and the installation efficiency of the workers is improved;
3. the risk that the inner arm cutting device is separated from the mounting section is reduced, and the safety of the arm cutting device is enhanced.
Drawings
Fig. 1 is a schematic structural diagram of a counterweight jib-intercepting device of a tower crane provided by an embodiment of the application.
Fig. 2 is a front view of a counterweight jib cutting device of a tower crane provided in an embodiment of the present application.
Fig. 3 is an enlarged schematic view of a portion a in fig. 1.
Fig. 4 is an enlarged schematic view of a portion B in fig. 1.
Description of reference numerals: 1. a cargo boom; 11. a section to be disassembled; 12. installing a joint; 2. a variable amplitude trolley; 3. a support assembly; 31. a base; 311. a roller; 312. a safety cord; 313. a chute; 32. a boom; 321. a mounting seat; 33. a support bar; 34. a sliding member; 341. a slider; 35. a fixing member; 36. a pusher member; 361. a sleeve portion; 362. a push rod part; 4. a connecting rod; 5. a reinforcing bar; 6. a guide pulley.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses counter weight of tower crane cuts arm device. Referring to fig. 1 and 2, a counterweight cutoff arm device of a tower crane is used for cutting off a crane arm 1 in the air. The crane boom 1 is composed of a plurality of sections of boom frames, and two adjacent boom frames are connected through a pin shaft. The arm support comprises an upper chord and two lower chords, the two lower chords are also used as running tracks of the amplitude-variable trolley 2, and the whole arm support is of a triangular space frame structure. The boom frame to be disassembled on the boom 1 is a section 11 to be disassembled, and the boom frame adjacent to the section 11 to be disassembled is a mounting section 12.
Referring to fig. 1 and 2, the counterweight jib cutting device of the tower crane comprises a support component 3 which is detachably arranged on a crane arm 1. The support assembly 3 includes a base 31, the base 31 is a square tube, and the length direction of the base 31 is parallel to the length direction of the mounting section 12. One end of the base 31 is detachably mounted on the amplitude variation trolley 2 through a bolt, the other end of the base 31 is provided with a roller 311, and when the base 31 is mounted on the amplitude variation trolley 2, the roller 311 is in rolling contact with the top surface of the lower chord of the mounting joint 12. The tail end of the base 31 is further provided with a safety rope 312 for connecting a lower chord, and the safety rope 312 is a steel wire rope. The base 31 is arranged on the amplitude variation trolley 2, so that the position of the arm cutting device can be conveniently adjusted by a worker; the base 31 is supported on the lower chord through the roller 311, so that the whole base 31 is kept balanced; the end of the base 31 far away from the luffing jib 2 is connected to the lower chord through the safety rope 312, so that the stability of the jib cutting device is enhanced.
Referring to fig. 1 and 3, a boom 32 is hinged to an end of the top surface of the base 31 near the roller 311 and extends above the joint 11 to be dismantled. The end of the suspension rod 32 far away from the base 31 is hinged with a supporting rod 33, and the end of the supporting rod 33 far away from the suspension rod 32 is hinged with a sliding part 34. The bottom end of the sliding piece 34 is provided with a sliding block 341 with a T-shaped cross section, the top surface of the base 31 is provided with a sliding chute 313 for the sliding block 341 to slide, and the extending direction of the sliding chute 313 is parallel to the length direction of the base 31. The sliding block 341 is slidably disposed in the sliding slot 313, and the sliding member 34 is slidably disposed on the base 31 through the sliding block 341.
Referring to fig. 1 and 3, the sliding member 34 is provided with a fixing member 35, and the fixing member 35 is a bolt in this embodiment. The top surface of the base 31 at the end away from the roller 311 is provided with a fixing hole for the screw thread connection of the bolt. The bolt is screwed to the base 31 by passing through the slider 34, and fixes the slider 341 to the base 31, thereby restricting the displacement of the slider 34 and allowing the support rod 33 to support the boom 32.
Referring to fig. 1 and 2, a pushing member 36 for providing a pushing force is disposed between the suspension rod 32 and the support rod 33, and the pushing member 36 includes a sleeve portion 361 and a push rod portion 362 slidably connected to the sleeve portion 361. In the present embodiment, the pusher 36 is a cylinder, the sleeve portion 361 is a cylinder, and the rod portion 362 is a piston rod. The sleeve portion 361 is hinged to the support rod 33, and the push rod portion 362 is hinged to the suspension rod 32. After the worker mounts the base 31 on the luffing carriage 2, the pusher 36 is actuated to push the support bar 33 and the boom 32 away from each other. The sliding member 34 slides from one end close to the roller 311 to a direction away from the roller 311, and struts the boom 32 and the support bar 33. The arm cutting device is convenient for workers to install, and the installation efficiency of the workers is improved.
Referring to fig. 1 and 4, the support members 3 are provided in two sets, and the two sets of support members 3 are respectively distributed on the two lower chords of the mounting section 12. The equal rigid coupling in one side that two jibs 32 are relative has three mount pad 321, and three mount pad 321 is along jib 32's length direction evenly distributed, and three mount pad 321 is first mount pad, second mount pad and third mount pad in proper order from the one end that base 31 was kept away from to jib 32 to the one end that jib 32 is close to base 31, all is provided with the rectangular channel on the three mount pad 321. A connecting rod 4 is detachably mounted between the two sets of first mounting seats, the connecting rod 4 is a square tube, and two ends of the connecting rod 4 are respectively erected in the rectangular grooves of the two first mounting seats and are fixedly connected through bolts.
Referring to fig. 1 and 2, two reinforcing rods 5 are detachably mounted between the two hanger rods 32, and the two reinforcing rods 5 are respectively mounted at the second mount and the third mount of the hanger rods 32. The reinforcing bar 5 is mounted on the boom 32 in the same manner as the connecting rod 4 is mounted on the boom 32. The stability between the two booms 32 is enhanced by installing the reinforcing bar 5 between the two booms 32, and the stability of the entire boom device is enhanced. The reinforcing rod 5 arranged on the third mounting seat penetrates through the mounting section 12, so that the connection between the arm cutting device and the mounting section 12 is enhanced, and the safety function is achieved.
Referring to fig. 1 and 2, a guide pulley 6 is installed at the middle position of the connecting rod 4, the length direction of the rotation central axis of the guide pulley 6 is parallel to the length direction of the connecting rod 4, a steel wire rope is arranged on the guide pulley 6, one end of the steel wire rope is used for being connected to the middle position of the upper chord of the section to be disassembled 11, and the other end of the steel wire rope is used for being connected to a winch of a tower crane.
When a worker installs the jib cutting device on the jib 1, the two bases 31 are fixed on the luffing trolley 2 through bolts; a reinforcing bar 5 is then mounted on the third mounting seat. Then the pushing element 36 is actuated, the sliding element 34 starts to slide from the end close to the roller 311 to the end far from the roller 311, and the end of the boom 32 hinged with the supporting rod 33 starts to rise. When the first mounting seat rises to be higher than the upper chord of the mounting section 12, the pushing piece 36 is paused, the connecting rod is mounted on the first mounting seat, and the steel wire rope connected with the winch is wound on the guide pulley 6; then the pushing part 36 continues to push, when the second mounting seat is higher than the upper chord of the mounting section 12, the pushing rod is stopped again, another reinforcing rod 5 is mounted on the second mounting seat, then the pushing part 36 continues to push, when the sliding part 34 slides to one end of the base 31 far away from the roller 311, the sliding part 34 is fixed on the base 31 by using a bolt, and the mounting of the arm cutting equipment is completed.
The embodiment of the application also discloses an arm cutting process, which comprises the following specific operation steps:
s1, hanging the arm cutting device on a balance arm of the tower crane from the ground;
s2, moving the amplitude variation trolley 2 to one end of the crane boom 1 close to the tower body;
s3, mounting the two bases 31 on the amplitude variation trolley 2;
s4, moving the amplitude variation trolley 2 to one end of the mounting joint 12 close to the joint 11 to be disassembled and fixing;
s5, mounting a reinforcing rod 5 on two third mounting seats, then driving a pushing piece 36, mounting a connecting rod 4 and another reinforcing rod 5 step by step, enabling a steel wire rope connected with a winch to bypass a guide pulley 6 and be fixed on a section to be dismounted 11, and fixing a sliding piece 34 on a base 31 through a bolt to finish the mounting of the arm cutting device;
s6, starting the winch to tighten the pull rope, and balancing the gravity of the section to be disassembled 11 when the section to be disassembled 11 is pulled upwards;
s7, removing the pin shaft between the section to be disassembled 11 and the mounting section 12, so that the section to be disassembled 11 and the mounting section 12 are disassembled;
s8, lowering the section to be disassembled 11 to the ground through a winch;
s9, detaching the connecting rod 4 and the two reinforcing rods 5, moving the luffing trolley 2 to the arm support adjacent to the mounting section 12, reassembling the arm cutting device, changing the mounting section 12 into a new section to be disassembled 11, changing the arm support where the luffing trolley 2 is located into a new mounting section 12, and repeating S6-S8 until the surrounding buildings do not influence the descending of the jib 1.
The implementation principle of the arm cutting process in the embodiment of the application is as follows: the crane boom 1 is shortened in the air through the jib cutting device, so that the crane boom 1 is prevented from being lowered due to surrounding buildings, the crane boom 1 is convenient to be lowered to the initial installation height, and workers can use the truck crane to complete the whole dismantling of the tower crane.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides a counter weight of tower crane cuts arm device for dismantle jib loading boom (1), jib loading boom (1) is including waiting to tear a section (11) and adjacent to waiting to tear an installation section (12) of section (11) open, its characterized in that: including supporting component (3) and guide pulley (6) of installing on supporting component (3), supporting component (3) are including being used for installing base (31) on becoming width of cloth dolly (2), articulated on base (31) have jib (32) that are used for extending to wait to tear a section (11) top open, still install bracing piece (33) that are used for supporting jib (32) on base (31), bracing piece (33) one end articulates on jib (32), bracing piece (33) other end can be dismantled and support on base (31), guide pulley (6) are installed in jib (32) one end of keeping away from base (31).
2. The counterweight jib cutting device of a tower crane according to claim 1, wherein: the supporting component (3) are provided with two sets, two sets of supporting components (3) are used for being installed on the two sides of the installation section (12), a connecting rod (4) is installed between the two hanging rods (32), the connecting rod (4) is located at one end, away from the base (31), of the hanging rod (32), and the guide pulley (6) is installed on the connecting rod (4).
3. The counterweight jib cutting device of a tower crane according to claim 2, wherein: the utility model discloses a support pole, including bracing piece (33), jib (32), bracing piece (33) keep away from to have a glide (34) with the one end of jib (32) is articulated, glide (34) slide and set up on base (31), the glide direction of glide (34) is on a parallel with the length direction of erection joint (12), be provided with mounting (35) on glide (34), glide (34) can dismantle through mounting (35) and fix on base (31).
4. The counterweight jib cutting device of a tower crane according to claim 3, wherein: the supporting assembly (3) further comprises a pushing member (36) used for providing pushing force, the pushing member (36) comprises a sleeve portion (361) and a push rod portion (362) connected to the sleeve portion (361) in a sliding mode, the sleeve portion (361) is hinged to the supporting rod (33), and the push rod portion (362) is hinged to the hanging rod (32).
5. The counterweight jib cutting device of a tower crane according to claim 1, wherein: one end of the base (31), which is far away from the amplitude variation trolley (2), is provided with a safety rope (312) used for connecting a lower chord.
6. The counterweight jib cutting device of a tower crane according to claim 1, wherein: and one end of the base (31), which is far away from the amplitude variation trolley (2), is provided with a roller (311) which is used for rolling contact with the lower chord.
7. The counterweight jib cutting device of a tower crane according to claim 3, wherein: the fixing part (35) is a bolt, the bolt can be detachably arranged on the sliding part (34) in a penetrating mode, and a fixing hole for threaded connection of the bolt is formed in one end, far away from the suspender (32), of the base (31).
8. The counterweight jib cutting device of a tower crane according to claim 1, wherein: two install at least one stiffener (5) between jib (32), the both ends of stiffener (5) are connected respectively in two jibs (32).
9. The counterweight jib cutting device of a tower crane according to claim 8, wherein: at least one reinforcing rod (5) penetrates through the mounting joint (12).
10. The arm cutting process of the counterweight arm cutting device of the tower crane according to any one of claims 1-9, wherein the process comprises the following steps:
s1, hanging the arm cutting device on a balance arm of the tower crane from the ground;
s2, moving the amplitude variation trolley (2) to one end of the crane boom (1) close to the tower body;
s3, mounting the two bases (31) on the amplitude variation trolley (2);
s4, moving the amplitude variation trolley (2) to one end of the mounting joint (12) close to the joint (11) to be disassembled and fixing;
s5, mounting a reinforcing rod (5) on two third mounting seats (321), then driving a pushing piece (36), mounting a connecting rod (4) and another reinforcing rod (5) step by step, enabling a steel wire rope connected to a winch to bypass a guide pulley (6) and be fixed on a section to be disassembled (11), and fixing a sliding piece (34) on a base (31) through a bolt to complete the mounting of the arm cutting device;
s6, starting the winch to tighten the pull rope, and balancing the gravity of the section to be disassembled (11) by the upward pulling force of the section to be disassembled (11);
s7, removing the pin shaft between the section to be disassembled (11) and the mounting section (12) to disassemble the section to be disassembled and the mounting section (12);
s8, lowering the section to be disassembled (11) to the ground through a winch;
s9, detaching the connecting rod (4) and the two reinforcing rods (5), moving the luffing trolley (2) to the arm support adjacent to the mounting section (12), reassembling the boom cutting device, wherein the mounting section (12) becomes a new section to be disassembled (11), the arm support where the luffing trolley (2) is located becomes a new mounting section (12), and S6-S8 are repeated until the surrounding buildings do not influence the descending of the crane boom (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111339486.8A CN114084816A (en) | 2021-11-12 | 2021-11-12 | Counterweight arm cutting device and arm cutting process of tower crane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111339486.8A CN114084816A (en) | 2021-11-12 | 2021-11-12 | Counterweight arm cutting device and arm cutting process of tower crane |
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| CN114084816A true CN114084816A (en) | 2022-02-25 |
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| CN202111339486.8A Pending CN114084816A (en) | 2021-11-12 | 2021-11-12 | Counterweight arm cutting device and arm cutting process of tower crane |
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| CN108892060A (en) * | 2018-08-31 | 2018-11-27 | 中昇建机(南京)重工有限公司 | A kind of crane upper mechanism is from dismantling device, crane and tears method open certainly |
| CN111392612A (en) * | 2020-04-17 | 2020-07-10 | 中国化学工程第三建设有限公司 | Device and method for high-altitude self-disassembly of tower crane arm rod |
| CN111422759A (en) * | 2020-04-17 | 2020-07-17 | 中国化学工程第三建设有限公司 | Method for dismantling tower crane in narrow space |
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