CN107445077A - Jib length combined technical method is converted in the air from liter arm tower crane - Google Patents

Jib length combined technical method is converted in the air from liter arm tower crane Download PDF

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Publication number
CN107445077A
CN107445077A CN201710830201.8A CN201710830201A CN107445077A CN 107445077 A CN107445077 A CN 107445077A CN 201710830201 A CN201710830201 A CN 201710830201A CN 107445077 A CN107445077 A CN 107445077A
Authority
CN
China
Prior art keywords
crane arm
crane
leading
drag
line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710830201.8A
Other languages
Chinese (zh)
Inventor
郭志康
胡水根
孙烽炜
苏栋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhengzhou Kerun Mechanical & Electron Engineering Co Ltd
Original Assignee
Zhengzhou Kerun Mechanical & Electron Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhengzhou Kerun Mechanical & Electron Engineering Co Ltd filed Critical Zhengzhou Kerun Mechanical & Electron Engineering Co Ltd
Priority to CN201710830201.8A priority Critical patent/CN107445077A/en
Publication of CN107445077A publication Critical patent/CN107445077A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes 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
    • B66C23/62Constructional features or details
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes 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
    • B66C23/62Constructional features or details
    • B66C23/64Jibs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes 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
    • B66C23/62Constructional features or details
    • B66C23/82Luffing gear

Abstract

It is a kind of to convert jib length combined technical method in the air from liter arm tower crane, it is characterised in that:Methods described is as follows:It is working face that operating platform is set below crane arm, and is equipped with auxiliary hoist, while the assembling of crane arm installation drag-line is in place, you can carries out jib length conversion in the air.The present invention has the characteristics that easy to operate, safe and practical, short time limit, cost are low compared with prior art, and an aerial crane arm combination of conversion about needs two days, about 1.5 ten thousand yuan of equipment leasing expense, about 2000 yuan of labour cost, adds up to 1.7 ten thousand yuan.

Description

Jib length combined technical method is converted in the air from liter arm tower crane
Technical field
The present invention relates to a kind of process for converting jib length combination in the air from liter arm tower crane.
Background technology
From liter arm tower crane with lifting capacity is big, job area is wide, lifting altitude is big, from heavy and light the features such as it is extensive Construction and installation applied to industries such as water power, oil, chemical industry, metallurgy, high-rise civil buildings.From liter movable arm type tower crane it is specified Weight is changed as the length combination of crane arm is different with elevation angle during work, and wherein the length combination of crane arm is different Directly affect tower crane maximum rated lifting capacity accordingly.To same crane gear and building, in building construction compared with Big working face is combined using lifting brachium while lifting capacity is smaller, and short group of crane arm is used in less work surface construction Close, generally require larger lifting capacity, in the flexion-extension by crane arm engineering can not be met to work range and lifting capacity It is required that when, it is necessary to construction technology and technical measures are taken to meet needs of constructing.
Can having unlike the cocked formula crane such as crawler crane from liter movable arm type tower crane for prior art is quick cocked, anti- Function, so as to convert jib length combination freely on ground, and tower crane tower body and lifting after jacking is adhered to is risen certainly About 60 meters ~ 120 meters of arm height, to adapt to needs of constructing, efficiency is improved, change work range and corresponding maximum in construction midway Problem will be turned into by determining lifting capacity.At present, from tower crane is risen because having two kinds of processing methods when construction midway amplitude or improper lifting capacity: First, complete lifting construction task by leasing crane in addition, 1 200 tons of yuan/day of crawler crane rental charge 6000,180,000 yuan/ Month, engineering cost greatly increases;Second, tower crane is down into ground conversion jib length and then jacking, torn open again equal to equipment Unload, install once, not only workload is huge, the duration does not allow, and somewhat expensive, and 100 tons are dismantled once from tower crane installation is risen About 200,000 yuan of labour cost, auxiliary hanging fare, and the method is larger to equipment damage, and construction technology is also worthless.
The content of the invention
The purpose of the present invention is exactly to be provided a kind of from liter swing arm for the weak point in the presence of above-mentioned prior art Derrick crane converts the process of jib length combination in the air.This method converts crane arm in the air by whipline Length combination process, which preferably solves construction midway tower crane lifting capacity and work range, to be needed to change a problem, makes equipment certainly Such as work, operating efficiency greatly improves, and construction cost substantially reduces.
The purpose of the present invention can be realized by following technique measures:
It is as follows that the arm tower crane of liter certainly of the present invention converts jib length combined technical method in the air:Below crane arm It is working face to set operating platform, and is equipped with auxiliary hoist, while the assembling of crane arm installation drag-line is in place, you can is entered in the air Row jib length is changed;When needing to carry out supernumerary segment to crane arm, crane arm is put to maximum functional amplitude, releases jib lubbing mechanism Amplitude peak is spacing, then slowly release variable-amplitude steel wire rope, by crane arm be leveled to installation drag-line stretch, until crane arm deadweight by Installation drag-line is born, and now the crane arm elevation angle is carried out according to the following steps afterwards between 0 ° ~ 5 °;
A, in the case of safe Cable forces, major and minor hook is fallen on the operational platform, and by main, auxiliary lifting steel wire rope in addition The length of two standard knots is released, variable-amplitude steel wire rope is released, luffing running block is fallen chain-wales corresponding in crane arm horizontal plane On;Wherein, suspension hook will be placed steadily, and major and minor hook steel wire rope can not influence the leading portion pulled down and olecranon movement;
B, crane arm leading portion and standard knot are sling using whipline, cable disconnected from standard knot splicing position, before crane arm Section fixes respectively to the later cable of the cable and standard knot on head, and luffing drag-line is taken apart at the connection bearing pin of leading portion, Turn over and drag-line and lie in a horizontal plane in crane arm horizontal plane, fix, dismounting crane arm leading portion and standard internode bearing pin, afterwards Make the two disengagement;
C, crane arm leading portion is placed on the operational platform, hangs two section standard knots to platform from ground and connect with crane arm leading portion Connect, in crane arm leading portion luffing drag-line lengthening section installed above, the process of mobile crane arm leading portion pays attention to the peace of hoist rope Entirely;
D, the assembly of increased standard knot and crane arm leading portion is lifted, is connected with former crane arm, puts on bearing pin, by two sections of luffings Drag-line connects, and starts lifting mechanism and packs up major and minor hook, start jib lubbing mechanism and tighten up luffing drag-line, crane arm is risen into maximum work Make amplitude, set luffing limit switch;
By above-mentioned steps, crane arm supernumerary segment is completed, and crane arm tears section process open in contrast.
Beneficial effects of the present invention are as follows:
The present invention has the characteristics that easy to operate, safe and practical, short time limit, cost are low compared with prior art, and aerial conversion is once Crane arm combination about needs two days, about 1.5 ten thousand yuan of equipment leasing expense, and about 2000 yuan of labour cost is total 1.7 ten thousand yuan, and existing skill The 180000 yuan/platform of network minimal of art times, difference are obvious.It is 25 years by the life-span of a crane, has enough to meet the need 15 projects under construction, Each project converts a crane arm combination, and cost-saved 18x15 in its life cycle after a crane application this patent= 2700000 yuan.
Brief description of the drawings
Fig. 1 is step A schematic diagram.
Fig. 2 is step B schematic diagram.
Fig. 3 is step C schematic diagram.
Fig. 4 is step D schematic diagram.
Embodiment
The present invention is below with reference to embodiment(Accompanying drawing)It is further described:
It is as follows that the arm tower crane of liter certainly of the present invention converts jib length combined technical method in the air:Below crane arm It is working face to set operating platform, and is equipped with auxiliary hoist, while the assembling of crane arm installation drag-line is in place, you can is entered in the air Row jib length is changed;When needing to carry out supernumerary segment to crane arm, crane arm is put to maximum functional amplitude, releases jib lubbing mechanism Amplitude peak is spacing, then slowly release variable-amplitude steel wire rope, by crane arm be leveled to installation drag-line stretch, until crane arm deadweight by Installation drag-line is born, and now the crane arm elevation angle is carried out according to the following steps afterwards between 0 ° ~ 5 °;
A, in the case of safe Cable forces, major and minor hook is fallen on the operational platform, and by main, auxiliary lifting steel wire rope in addition The length of two standard knots is released, variable-amplitude steel wire rope is released, luffing running block is fallen chain-wales corresponding in crane arm horizontal plane On;Wherein, suspension hook will be placed steadily, and major and minor hook steel wire rope can not influence the leading portion pulled down and olecranon movement;
B, crane arm leading portion and standard knot are sling using whipline, cable disconnected from standard knot splicing position, before crane arm Section fixes respectively to the later cable of the cable and standard knot on head, and luffing drag-line is taken apart at the connection bearing pin of leading portion, Turn over and drag-line and lie in a horizontal plane in crane arm horizontal plane, fix, dismounting crane arm leading portion and standard internode bearing pin, afterwards Make the two disengagement(Referring to Fig. 2);
C, crane arm leading portion is placed on the operational platform, hangs two section standard knots to platform from ground and connect with crane arm leading portion Connect, in crane arm leading portion luffing drag-line lengthening section installed above, the process of mobile crane arm leading portion pays attention to the peace of hoist rope Entirely(Referring to Fig. 3);
D, the assembly of increased standard knot and crane arm leading portion is lifted, is connected with former crane arm, puts on bearing pin, by two sections of luffings Drag-line connects, and starts lifting mechanism and packs up major and minor hook, start jib lubbing mechanism and tighten up luffing drag-line, crane arm is risen into maximum work Make amplitude, set luffing limit switch(Referring to Fig. 4).
By above-mentioned steps, crane arm supernumerary segment is completed, and crane arm tears section process open in contrast.
Points for attention
A, crane arm simultaneously switches off cable before tearing section open, avoids tension and compression cable.
B, it should be noted that when steel wire rope is placed and avoid bending and being extruded by suspension hook.
C, the quantity of balance weight on after table will be adjusted according to the pattern length of crane arm by changing after the completion of arm.
(3)Aerial conversion crane arm combination supernumerary segment process signal(Section process is torn open on the contrary, equipment is in addition to whipline in figure It is that tower crane is had by oneself).

Claims (1)

1. a kind of convert jib length combined technical method in the air from liter arm tower crane, it is characterised in that:The side Method is as follows:It is working face that operating platform is set below crane arm, and is equipped with auxiliary hoist, while crane arm installation drag-line dress With in place, you can carry out jib length conversion in the air;When needing to carry out supernumerary segment to crane arm, crane arm is put to maximum work Make amplitude, releasing jib lubbing mechanism amplitude peak is spacing, then slowly releases variable-amplitude steel wire rope, and crane arm is leveled into installation drag-line draws Directly, conduct oneself with dignity until crane arm and born by installation drag-line, now the crane arm elevation angle is carried out according to the following steps afterwards between 0 ° ~ 5 °;
A, in the case of safe Cable forces, major and minor hook is fallen on the operational platform, and by main, auxiliary lifting steel wire rope in addition The length of two standard knots is released, variable-amplitude steel wire rope is released, luffing running block is fallen chain-wales corresponding in crane arm horizontal plane On;Wherein, suspension hook will be placed steadily, and major and minor hook steel wire rope can not influence the leading portion pulled down and olecranon movement;
B, crane arm leading portion and standard knot are sling using whipline, cable disconnected from standard knot splicing position, before crane arm Section fixes respectively to the later cable of the cable and standard knot on head, and luffing drag-line is taken apart at the connection bearing pin of leading portion, Turn over and drag-line and lie in a horizontal plane in crane arm horizontal plane, fix, dismounting crane arm leading portion and standard internode bearing pin, afterwards Make the two disengagement;
C, crane arm leading portion is placed on the operational platform, hangs two section standard knots to platform from ground and connect with crane arm leading portion Connect, in crane arm leading portion luffing drag-line lengthening section installed above, the process of mobile crane arm leading portion pays attention to the peace of hoist rope Entirely;
D, the assembly of increased standard knot and crane arm leading portion is lifted, is connected with former crane arm, puts on bearing pin, by two sections of luffings Drag-line connects, and starts lifting mechanism and packs up major and minor hook, start jib lubbing mechanism and tighten up luffing drag-line, crane arm is risen into maximum work Make amplitude, set luffing limit switch;
By above-mentioned steps, crane arm supernumerary segment is completed, and crane arm tears section process open in contrast.
CN201710830201.8A 2017-09-15 2017-09-15 Jib length combined technical method is converted in the air from liter arm tower crane Pending CN107445077A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710830201.8A CN107445077A (en) 2017-09-15 2017-09-15 Jib length combined technical method is converted in the air from liter arm tower crane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710830201.8A CN107445077A (en) 2017-09-15 2017-09-15 Jib length combined technical method is converted in the air from liter arm tower crane

Publications (1)

Publication Number Publication Date
CN107445077A true CN107445077A (en) 2017-12-08

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Application Number Title Priority Date Filing Date
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4003475A (en) * 1974-11-27 1977-01-18 Fmc Corporation Crane boom lattice and hoist line protection assembly
CN103663189A (en) * 2014-01-02 2014-03-26 中联重科股份有限公司 Moving arm tower crane installation method
CN103754775A (en) * 2014-01-17 2014-04-30 中联重科股份有限公司 Arm detaching method for swing arm tower crane and auxiliary detaching device
CN104860209A (en) * 2015-05-08 2015-08-26 中建三局第二建设工程有限责任公司 Aloft arm changing method of movable arm tower crane

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4003475A (en) * 1974-11-27 1977-01-18 Fmc Corporation Crane boom lattice and hoist line protection assembly
CN103663189A (en) * 2014-01-02 2014-03-26 中联重科股份有限公司 Moving arm tower crane installation method
CN103754775A (en) * 2014-01-17 2014-04-30 中联重科股份有限公司 Arm detaching method for swing arm tower crane and auxiliary detaching device
CN104860209A (en) * 2015-05-08 2015-08-26 中建三局第二建设工程有限责任公司 Aloft arm changing method of movable arm tower crane

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Application publication date: 20171208

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