CN112279121A - Method for dismantling tower crane - Google Patents
Method for dismantling tower crane Download PDFInfo
- Publication number
- CN112279121A CN112279121A CN201910678523.4A CN201910678523A CN112279121A CN 112279121 A CN112279121 A CN 112279121A CN 201910678523 A CN201910678523 A CN 201910678523A CN 112279121 A CN112279121 A CN 112279121A
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- CN
- China
- Prior art keywords
- arm
- disassembling
- crane
- balance weight
- disassembled
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Classifications
-
- 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
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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
- B66C23/16—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 with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements
- B66C23/166—Simple cranes with jibs which may be fixed or can slew or luff
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention relates to the technical field of cranes, in particular to a method for dismounting a tower crane, which solves the problems that a method for dismounting a cargo boom of a crane in the prior art is complex in structure and low in applicability, and comprises the following steps of S1, dismounting a counterweight block: fixing a hoisting trolley at the root of a hoisting arm, hoisting and disassembling the balance weight block by using a steel wire rope by using a crane, disassembling a connecting plate arranged on the balance weight block, and then sequentially disassembling the balance weight block according to the reverse order of the balance weight; s2, disassembling the crane arm; s3, disassembling and putting a crane arm: two pin shafts of a lower chord on a cargo boom to be disassembled are disassembled from the lifting hook connected by a steel wire rope, and then the disassembled cargo boom is hoisted to the ground by the lifting hook; s4: the support arm can be disassembled by utilizing the support arm arranged on the tower crane, so that the support arm is matched with the short support rod and the long support rod, and the high-altitude disassembly is completed on the balance arm under the action of driving the winding steel wire rope by the motor.
Description
Technical Field
The invention relates to the technical field of cranes, in particular to a method for dismantling a tower crane.
Background
When demolishing the large-scale tower crane at super high-rise building top, the process is comparatively simple, and construction cycle is shorter, demolishs the mode and generally does: after the construction of the large tower crane is finished, a corresponding smooth position is found at the top, a small tower crane and a roof crane which can be automatically dismantled are directly arranged, and the small tower crane and the roof crane are dismantled in sequence from big to small without any replacement and auxiliary measures. However, the method and the process steps are very suitable for the dismantling of the large tower crane under the engineering environmental characteristics of simple structure of the top of the building, gentle structure plane and small contraction amplitude of the vertical face of the building.
However, the method for dismantling the tower crane cannot meet the following requirements of dismantling the tower crane under the working conditions of the building environment: when the vertical surface of the super high-rise building is greatly inclined and contracted towards the inner side, the difference between the side line of the top structure and the side line of the bottom structure of the building exceeds the range of the lifting performance of the existing mechanical equipment, so that the tower crane cannot be dismounted by adopting the conventional dismounting method; and in the case that the contraction is continuous for the building elevation, the platform roofs on different heights formed by similar step type contraction are not used for erecting the dismounting device.
Therefore, under the non-stepped continuous building facade greatly-contracted working condition environment, when the performance of the demolition device meets the hoisting weight requirement of tower crane demolition, normal hoisting can be carried out only by a certain hoisting radius, but the hoisting radius is often smaller than the difference between the side line of the top structure and the side line of the bottom structure of the building, the demolition device collides with the understructure of the building, the demolition device cannot normally work, the hoisting radius is larger, and meanwhile, the large demolition device which can meet the hoisting weight requirement of tower crane demolition does not have enough space for erection.
Disclosure of Invention
The invention aims to solve the defects of complex structure and low applicability of a method for disassembling a cargo boom of a crane in the prior art, and provides a method for disassembling a tower crane.
In order to achieve the purpose, the invention adopts the following technical scheme:
a tower crane dismantling method comprises the following operation steps:
s1, disassembling the balance weight: fixing a hoisting trolley at the root of the balance arm, hoisting and disassembling the balance weight block by using a steel wire rope by using a crane, disassembling a connecting plate arranged on the balance weight block, and then sequentially disassembling the balance weight block according to the reverse order of the balance weight;
s2, disassembling the crane arm: hoisting the jib to be dismantled, dismantling the two lower pin shafts, subsequently replacing the original pin shafts with two M16X150 bolts, then removing the upper chord pin shaft, slowly descending the jib to be dismantled under the bearing action of the steel wire rope, and suspending the jib to be dismantled on the two pin shafts of the lower chord;
s3, disassembling and putting a crane arm: two pin shafts of a lower chord on a cargo boom to be disassembled are disassembled from the lifting hook connected by a steel wire rope, and then the disassembled cargo boom is hoisted to the ground by the lifting hook;
s4: disassembling the supporting arm: the supporting arm is hoisted through the lifting hook arranged on the balance arm, then under the connecting action of the drawknot ear plates, the connecting pin shafts between the short supporting rod and the supporting arm and between the long supporting rod and the supporting arm are pulled out, the short supporting rod and the long supporting rod are pulled down from the supporting arm, and the supporting arm which is pulled down is hoisted to the ground by the lifting hook.
Preferably, the width between the connecting plates is determined according to the size of the pulley, the middle lining is fixed by an M16 bolt, and the length of the bolt is reserved for 100 mm.
Preferably, the support arm is provided with two short support rods and two long support rods through pin shafts, and one ends of the short support rods and one ends of the long support rods are fixedly connected through the pin shafts.
Preferably, the boom upper chord and the boom lower chord are square tubes formed by welding two angle steels, the boom frame of the boom is a triangular section, and the sections are connected with each other by a pin shaft.
The invention has the beneficial effects that:
1. the invention can disassemble the crane boom on the crane section by section, has simple operation, ensures the installation performance and improves the working efficiency of the disassembly operation of the crane boom.
2. According to the invention, the support arm arranged on the tower crane can be utilized to enable the support arm to be matched with the short support rod and the long support rod, and the high-altitude dismantling is completed on the balance arm under the action of the motor driving the winding steel wire rope.
Drawings
FIG. 1 is a schematic view of the overall structure of a method for dismantling a tower crane according to the present invention;
FIG. 2 is a schematic top view of a support arm, a short brace rod and a long brace rod of the method for dismantling a tower crane according to the present invention;
FIG. 3 is a schematic structural diagram of a boom of a tower crane demolition method according to the present invention;
fig. 4 is a schematic structural diagram of a tower crane demolition method after a boom is separated.
In the figure: 1 balance arm, 2 drawknot ear plates, 3 long stay bars, 4 motors, 5 short stay bars, 6 support arms and 7 crane arms.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example (b): referring to fig. 1 to 4, a method for dismantling a tower crane includes the following steps:
s1, disassembling the balance weight: fixing a hoisting trolley at the root of the balance arm 1, hoisting and disassembling the balance weight block by using a steel wire rope by using a crane, firstly disassembling a connecting plate arranged on the balance weight block, and then sequentially disassembling the balance weight block according to the reverse order of the balance weight;
the width between the connecting plates is determined according to the size of the pulley, the middle lining is fixed by an M16 bolt, and the length of the bolt is reserved for 100 mm;
s2, disassembling the crane boom 7: hoisting the jib 7 to be dismantled, dismantling two lower pin shafts, subsequently replacing the original pin shafts with two M16X150 bolts, then removing the upper chord pin shaft, slowly descending the jib 7 to be dismantled under the bearing action of the steel wire rope, and suspending the jib on the two pin shafts of the lower chord;
the upper chord and the lower chord of the crane boom 7 are square pipes formed by welding two angle steels, the boom frame of the crane boom 7 is of a triangular section, and the sections are connected with each other by a pin shaft;
specifically, when the boom 7 to be disassembled is hoisted, the support arm 6 which drives the pulley and the lifting hook is used for supporting and hoisting, the support arm 6 is movably connected with the short support rod 5 and the long support rod 3 which are connected with the support arm 6, and the boom 7 can be stably placed on the ground after being disassembled through the arrangement of the support arm 6;
s3, disassembling and putting of the crane arm 7: two pin shafts of a lower chord on the cargo boom 7 to be disassembled are disassembled from the lifting hook connected by a steel wire rope, and then the disassembled cargo boom 7 is hoisted to the ground by the lifting hook;
specifically, when the crane boom 7 is disassembled, the upper chord member mounted on the upper portion of the crane boom is disassembled to enable the crane boom 7 to be disassembled to be hung on the lower chord member, then the lower chord member is disassembled from the crane boom 7, and the crane boom 7 is driven to be placed on the ground by utilizing a lifting hook hooked on the upper portion of the crane boom;
s4: detachment of the support arm 6: the supporting arm 6 is lifted by a lifting hook arranged on the balance arm 1, then under the connecting action of the drawknot ear plates 2, connecting pin shafts between the short stay bar 5 and the long stay bar 3 and the supporting arm 6 are drawn out, the short stay bar 5 and the long stay bar 3 are detached from the supporting arm 6, and the detached supporting arm 6 is lifted to the ground by the lifting hook;
the support arm 6 is provided with two short support rods 5 and two long support rods 3 through pin shafts, and one ends of the short support rods 5 and one ends of the long support rods 3 are fixedly connected through the pin shafts;
specifically, after the boom 7 is detached by using the support arm 6, the support arm 6 can be detached from the balance arm 1, so that the balance arm 1 can be detached one by one in the following process.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. A tower crane dismantling method is characterized by comprising the following operation steps:
s1, disassembling the balance weight: fixing a hoisting trolley at the root of a balance arm (1), hoisting and disassembling the balance weight block by using a steel wire rope by using a crane, disassembling a connecting plate arranged on the balance weight block, and then sequentially disassembling the balance weight block according to the reverse order of the balance weight;
s2, disassembling the crane arm (7): hoisting the jib (7) to be dismantled, dismantling two pin shafts at the lower part, subsequently replacing the original pin shafts with two M16X150 bolts, then removing the pin shafts of the upper chord, slowly descending the jib (7) to be dismantled under the bearing action of the steel wire rope, and suspending the jib on the two pin shafts of the lower chord;
s3, disassembling and putting of a crane arm (7): two pin shafts of a lower chord on the jib (7) to be disassembled are disassembled from the lifting hook connected by a steel wire rope, and then the disassembled jib (7) is hoisted to the ground by the lifting hook;
s4: detachment of the support arm (6): the supporting arm (6) is lifted through a lifting hook arranged on the balance arm (1), then under the connecting action of the drawknot ear plate (2), a connecting pin shaft between the short supporting rod (5) and the long supporting rod (3) and the supporting arm (6) is pulled out, the short supporting rod (5) and the long supporting rod (3) are detached from the supporting arm (6), and the detached supporting arm (6) is lifted to the ground through the lifting hook.
2. The tower crane dismantling method as claimed in claim 1, wherein the width between the connection plates is determined according to the size of the pulley, and the middle lining is fixed by using M16 bolts, and the length of the bolts is reserved for 100 mm.
3. A method for dismantling a tower crane according to claim 1, wherein two short braces (5) and two long braces (3) are mounted on said supporting arm (6) by means of pins, and one ends of the short braces (5) and the long braces (3) are fixedly connected by means of pins.
4. The tower crane dismantling method according to claim 1, wherein the boom (7) upper chord and the boom lower chord are square tubes formed by welding two angle steels, and the boom frame of the boom (7) has a triangular cross section, and the sections are connected by a pin shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910678523.4A CN112279121A (en) | 2019-07-25 | 2019-07-25 | Method for dismantling tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910678523.4A CN112279121A (en) | 2019-07-25 | 2019-07-25 | Method for dismantling tower crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112279121A true CN112279121A (en) | 2021-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910678523.4A Pending CN112279121A (en) | 2019-07-25 | 2019-07-25 | Method for dismantling tower crane |
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| CN (1) | CN112279121A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2206984A1 (en) * | 1972-02-15 | 1973-09-06 | Kaiser Kg Maschf Otto | TOWER CRANE |
| CN101734560A (en) * | 2009-12-18 | 2010-06-16 | 四川华西集团有限公司 | High-altitude dismantling method of inside-climbing tower crane for towering structure construction |
| CN102491191A (en) * | 2011-12-07 | 2012-06-13 | 中联重科股份有限公司 | Tower crane, derrick mast device and hoisting method thereof |
| CN205772956U (en) * | 2016-05-27 | 2016-12-07 | 中核华兴达丰机械工程有限公司 | Novel tower crane counterweight is from dismantling device |
| CN107758528A (en) * | 2016-08-22 | 2018-03-06 | 郭莉 | Based on the method for improving dismounting safety of tower crane |
| 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 |
-
2019
- 2019-07-25 CN CN201910678523.4A patent/CN112279121A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2206984A1 (en) * | 1972-02-15 | 1973-09-06 | Kaiser Kg Maschf Otto | TOWER CRANE |
| CN101734560A (en) * | 2009-12-18 | 2010-06-16 | 四川华西集团有限公司 | High-altitude dismantling method of inside-climbing tower crane for towering structure construction |
| CN102491191A (en) * | 2011-12-07 | 2012-06-13 | 中联重科股份有限公司 | Tower crane, derrick mast device and hoisting method thereof |
| CN205772956U (en) * | 2016-05-27 | 2016-12-07 | 中核华兴达丰机械工程有限公司 | Novel tower crane counterweight is from dismantling device |
| CN107758528A (en) * | 2016-08-22 | 2018-03-06 | 郭莉 | Based on the method for improving dismounting safety of tower crane |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 张文华: ""塔式起重机安装与拆除施工技术"", 《技术与市场》 * |
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| PB01 | Publication | ||
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Application publication date: 20210129 |