CN110395666A - A kind of large size A seating drum splayed door type upending frame and construction method for hanging - Google Patents

A kind of large size A seating drum splayed door type upending frame and construction method for hanging Download PDF

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Publication number
CN110395666A
CN110395666A CN201910722604.XA CN201910722604A CN110395666A CN 110395666 A CN110395666 A CN 110395666A CN 201910722604 A CN201910722604 A CN 201910722604A CN 110395666 A CN110395666 A CN 110395666A
Authority
CN
China
Prior art keywords
drum
lifting
axis beam
seating
upending frame
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
CN201910722604.XA
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Chinese (zh)
Inventor
杨献忠
耿绪彬
柏晓磊
牛德刚
姚掌舵
李书田
梁辉
王进昌
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Chengye Engineering Technology Group Co Ltd
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Chengye Engineering Technology Group Co Ltd
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Filing date
Publication date
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Priority to CN201910722604.XA priority Critical patent/CN110395666A/en
Publication of CN110395666A publication Critical patent/CN110395666A/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
    • B66C11/00Trolleys or crabs, e.g. operating above runways
    • B66C11/14Trolleys or crabs, e.g. operating above runways adapted to operate on crane or bridge structure of particular configuration, e.g. on reinforced concrete girders of rectangular cross-section
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00Other constructional features or details
    • B66C13/04Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00Other constructional features or details
    • B66C13/18Control systems or devices
    • B66C13/40Applications of devices for transmitting control pulses; Applications of remote control devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C19/00Cranes comprising trolleys or crabs running on fixed or movable bridges or gantries
    • 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
    • B66C23/06Cranes 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 mounted for jibbing or luffing movements
    • B66C23/08Cranes 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 mounted for jibbing or luffing movements and adapted to move the loads in predetermined paths
    • B66C23/10Cranes 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 mounted for jibbing or luffing movements and adapted to move the loads in predetermined paths the paths being substantially horizontal; Level-luffing jib-cranes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C7/00Runways, tracks or trackways for trolleys or cranes
    • B66C7/08Constructional features of runway rails or rail mountings

Abstract

The invention discloses a kind of large-scale A seating drum splayed door type upending frame and construction method for hanging, the structure of the type A seating drum splayed door type upending frame includes lifting support, hydraulic device, X axis beam, Y-axis beam and boom hoisting, the construction method for hanging step includes that hanging apparatus-lifting operation is hung-debugs in device erection and examination, compared to the structure that tradition only has a lifting beam, large-scale A seating drum splayed door type upending frame of the invention is additionally arranged longitudinal beam, cooperation lifting support realizes that this upending frame 3 D stereo is adjustable, so that upending frame service efficiency is higher, hanging method of the invention is used simultaneously, the error of lifting can greatly be reduced, improve the efficiency of lifting.

Description

A kind of large size A seating drum splayed door type upending frame and construction method for hanging
Technical field
The present invention relates to engineering construction field, in particular to a kind of large-scale A seating drum splayed door type upending frame and lifting are applied Work method.
Background technique
Drum is designed at the top of steelframe to the seat packet of the stokehold position Wai Tiao, has weight big, the high feature of mounting height, Therefore the hoisting difficulty that common hanging device carries out drum is larger.And the existing hanging apparatus operation for drum transformation is ineffective It is living, the efficiency of Steam Drum is on the one hand limited, the problem on the other hand causing lifting accuracy not high.
The present invention relates to large-scale A seating drum splayed door type upending frame and construction method for hanging, institutes by CN201810608491.6 Stating upending frame is the outer builder's jack of two groups of " η " types, and is arranged in front side, construction method for hanging packet at the top of boiler steel frame with " eight " word structure Include unload, Lift-on/Lift-off System arrangement, Lift-on/Lift-off System inspection and examination hang, drum formally lifts, the lifting and peace of drum support, supporting beam Dress removes system step.The present invention is arranged in furnace roof and is arranged with " eight " word gate using the outer builder's jack of two groups of " η " types carries out drum Lifting, solves that Steam Drum height is insufficient, and because no supporting-point extends to stokehold two big difficult points of underswing.The present invention Highly-safe, practical, at low cost, the boiler controller system crouching A seating Steam Drum suitable for 300MW grades and following rank is constructed, The present invention achieves significant economic benefit in engineering practice, is worthy to be popularized and answers.
Above-mentioned patented product does not solve the not high problem of Steam Drum low efficiency, accuracy.
Summary of the invention
Technical problem to be solved by the invention is to provide one kind to add longitudinal beam, and cooperation lifting support realizes upending frame three Dimension is three-dimensional adjustable, so that upending frame service efficiency is higher, while using special hanging method, can greatly reduce the mistake of lifting Difference improves the large-scale A seating drum splayed door type upending frame and construction method for hanging of the efficiency of lifting, to solve in the prior art Caused above-mentioned defects.
To achieve the above object, the present invention provides technical solution below: a kind of large-scale A seating drum splayed door type Upending frame, structure include that lifting support, hydraulic device, X axis beam, Y-axis beam and boom hoisting, lifting support are symmetrically set It sets, hydraulic device is arranged on lifting support, and X axis beam is horizontally installed on the lifting support of two sides, and Y-axis beam is arranged in X-axis To the interlude of beam, boom hoisting is mobile to be arranged on X axis beam and Y-axis beam.
A kind of construction method for hanging of large size A seating drum splayed door type upending frame, method and step include:
(1) device erection is hung with examination
The whole series lifting rack device is set up, examination is carried out after erection and is hung, take-up and pay-off device hauling block group is passed through Slowly hook up so that drum leave ground to it is quiet hang height when stop it is quiet hang, it is quiet to hang progress band-type brake test without exception, make pulley blocks Continue to rise to test height, unilateral off the hook correspondingly adjusts band-type brake if any hook phenomenon is slipped, then tests again, until qualified;
(2) hanging apparatus is debugged
According to drum site to be lifted, site height, transverse and longitudinal coordinate information is calculated, constitutes complete lifting site and sits Mark debugs upending frame according to the coordinate, drives lifting support to carry out height adjustment by hydraulic device, lifting support height wants high In drum height 2-4m in site to be lifted;
(3) lifting operation
Drum is strapped on pulley blocks, by remote control take-up and pay-off device take-up, until drum is more than lifting site Height 50-80cm, control driving device driving shifting roller moves on X axis beam, Y-axis beam, until reaching lifting site Transverse and longitudinal coordinate site, then slowly decline drum, until drum reach lifting site can be installed.
Preferably, described liter of valence bracket includes fixed frame, crane, sidewall notches, and fixed frame is square frame-shaped structure, Sidewall notches are symmetricly set on the two sides of fixed frame, and crane is arranged in fixed frame, and the two sides of crane are embedded in side wall In groove.
Preferably, the X axis beam and Y-axis girder construction are identical.
Preferably, the X axis beam and Y-axis girder construction are identical, and structure includes beam body and mobile groove, and beam body is length Strip structure, mobile groove are arranged in beam body.
Preferably, the boom hoisting includes device outrigger, shifting roller, driving device, remote controller, wire coiling and releasing It sets and pulley blocks, shifting roller is arranged on device outrigger, and be embedded in setting in mobile groove, driving device and shifting roller Connection setting, take-up and pay-off device are arranged on device outrigger, and pulley blocks are arranged on device outrigger, with take-up and pay-off device phase Match, remote controller setting is connect on device outrigger, and respectively with driving device and take-up and pay-off device signal.
Preferably, when step (2) the debugging upending frame, Y-axis beam must be positioned at the surface in installation site.
It is using the beneficial effect of above technical scheme: a kind of large-scale A seating drum splayed door type upending frame of the present invention and hangs Construction method is filled, compared to the structure that tradition only has a lifting beam, large-scale A seating drum splayed door type upending frame of the invention It is additionally arranged longitudinal beam, cooperation lifting support realizes that this upending frame 3 D stereo is adjustable, so that upending frame service efficiency is higher, together When using hanging method of the invention, can greatly reduce the error of lifting, improve the efficiency of lifting, described liter of valence bracket includes Fixed frame, crane, sidewall notches, fixed frame are square frame-shaped structure, and sidewall notches are symmetricly set on the two of fixed frame Side, crane are arranged in fixed frame, and in the two sides insertion sidewall notches of crane, the lifting support of the structure be can be realized This upending frame height adjustment, the X axis beam and Y-axis girder construction are identical, on the one hand identical structure can reduce device system This is caused, on the other hand can guarantee that boom hoisting is smoothly moved in X axis beam and Y-axis beam, the X axis beam and Y-axis Girder construction is identical, and structure includes beam body and mobile groove, and beam body is strip structure, and mobile groove is arranged in beam body, should The X axis beam and Y-axis beam of structure can be used as moving track, realize that the free position of boom hoisting is mobile, described lifting It sets including device outrigger, shifting roller, driving device, remote controller, take-up and pay-off device and pulley blocks, shifting roller setting exists On device outrigger, and setting is embedded in mobile groove, driving device connect setting with shifting roller, and take-up and pay-off device setting exists On device outrigger, pulley blocks are arranged on device outrigger, match with take-up and pay-off device, and remote controller is arranged in device outrigger On, and connect respectively with driving device and take-up and pay-off device signal, the boom hoisting of the structure can be mobile according to point, realizes Position is precisely lifted by crane, and when the step (2) debugs upending frame, Y-axis beam must be positioned at the surface in installation site, this method energy Enough ensure that this upending frame boom hoisting in lifting can always reach lifting site, so that lifting is more accurate efficiently.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of large-scale A seating drum splayed door type upending frame of the invention;
Fig. 2 is the structural schematic diagram of boom hoisting shown in Fig. 1;
Wherein, 1, lifting support;2, hydraulic device;3, X axis beam;4, Y-axis beam;5, boom hoisting;6, fixed frame; 7, crane;8, sidewall notches;9, beam body;10, mobile groove;11, device outrigger;12, shifting roller;13, driving device; 14, remote controller;15, take-up and pay-off device;16, pulley blocks.
Specific embodiment
The preferred embodiment that the invention will now be described in detail with reference to the accompanying drawings.
Fig. 1-2 shows a specific embodiment of the invention: a kind of large-scale A seating drum splayed door type upending frame, knot Structure includes lifting support 1, hydraulic device 2, X axis beam 3, Y-axis beam 4 and boom hoisting 5, and lifting support 1 is symmetrical arranged, hydraulic Device 2 is arranged on lifting support 1, and X axis beam 3 is horizontally installed on two sides lifting support 1, and Y-axis beam 4 is arranged in X axis The interlude of beam 3, boom hoisting 5 is mobile to be arranged on X axis beam 3 and Y-axis beam 4.
Described liter of valence bracket includes fixed frame 6, crane 7, sidewall notches 8, and fixed frame 6 is square frame-shaped structure, side Wall groove 8 is symmetricly set on the two sides of fixed frame 6, and crane 7 is arranged in fixed frame 6, and the two sides of crane 7 are embedded in side In wall groove 8.
The X axis beam 3 and 4 structure of Y-axis beam are identical, and structure includes beam body 9 and mobile groove 10, and beam body 9 is length Strip structure, mobile groove 10 are arranged in beam body 9.
Boom hoisting 5 as shown in connection with fig. 2 includes device outrigger 11, shifting roller 12, driving device 13, remote controller 14, take-up and pay-off device 15 and pulley blocks 16, shifting roller 12 are arranged on device outrigger 11, and are embedded in setting in mobile groove 10 Interior, driving device 13 connect setting with shifting roller 12, and take-up and pay-off device 15 is arranged on device outrigger 11, and pulley blocks 16 are arranged On device outrigger 11, match with take-up and pay-off device 15, remote controller 14 be arranged on device outrigger 11, and respectively with drive Dynamic device 13 is connected with 15 signal of take-up and pay-off device, the model YOMO-35GTQ of the remote controller 14.
A kind of construction method for hanging of large size A seating drum splayed door type upending frame, method and step include:
(1) device erection is hung with examination
The whole series lifting rack device is set up, examination is carried out after erection and is hung, take-up and pay-off device hauling block group is passed through Slowly hook up so that drum leave ground to it is quiet hang height when stop it is quiet hang, it is quiet to hang progress band-type brake test without exception, make pulley blocks Continue to rise to test height, unilateral off the hook correspondingly adjusts band-type brake if any hook phenomenon is slipped, then tests again, until qualified;
(2) hanging apparatus is debugged
According to drum site to be lifted, site height, transverse and longitudinal coordinate information is calculated, constitutes complete lifting site and sits Mark debugs upending frame according to the coordinate, and Y-axis beam must be positioned at the surface in installation site, is driven and is gone up and down by hydraulic device Bracket carries out height adjustment, and lifting support height is higher than drum height 3m in site to be lifted;
(3) lifting operation
Drum is strapped on pulley blocks, by remote control take-up and pay-off device take-up, until drum is more than lifting site Height 70cm, control driving device driving shifting roller moves on X axis beam, Y-axis beam, until reaching the cross in lifting site Then ordinate site slowly declines drum, until drum reaches lifting site and can be installed.
A kind of large-scale A seating drum splayed door type upending frame of the present invention and construction method for hanging, compared to tradition only one The structure of lifting beam, large-scale A seating drum splayed door type upending frame of the invention are additionally arranged longitudinal beam, and cooperation lifting support is realized This upending frame 3 D stereo is adjustable, so that upending frame service efficiency is higher, while using hanging method of the invention, Neng Gouji The big error for reducing lifting improves the efficiency of lifting, and described liter of valence bracket includes fixed frame, crane, sidewall notches, fixes Frame is square frame-shaped structure, and sidewall notches are symmetricly set on the two sides of fixed frame, and crane is arranged in fixed frame, lifting In the two sides insertion sidewall notches of frame, the lifting support of the structure can be realized this upending frame height adjustment, the X axis beam and Y-axis girder construction is identical, on the one hand identical structure can reduce device manufacturing cost, on the other hand can guarantee boom hoisting It is smoothly moved in X axis beam and Y-axis beam, the X axis beam and Y-axis girder construction are identical, and structure includes beam body and movement Groove, beam body are strip structure, and mobile groove is arranged in beam body, and the X axis beam and Y-axis beam of the structure can be as shiftings Dynamic rail road realizes that the free position of boom hoisting is mobile, the boom hoisting include device outrigger, shifting roller, driving device, Remote controller, take-up and pay-off device and pulley blocks, shifting roller are arranged on device outrigger, and are embedded in setting in mobile groove Interior, driving device connect setting with shifting roller, and take-up and pay-off device is arranged on device outrigger, and pulley blocks are arranged in device outrigger On, match with take-up and pay-off device, remote controller be arranged on device outrigger, and respectively with driving device and take-up and pay-off device The boom hoisting of signal connection, the structure can be mobile according to point, realizes that position is precisely lifted by crane, the step (2) is debugged When hanger, Y-axis beam must be positioned at the surface in installation site, and this method can ensure this upending frame boom hoisting in lifting Lifting site can always be reached, so that lifting is more accurate efficiently.
What has been described above is only a preferred embodiment of the present invention, it is noted that for those of ordinary skill in the art For, without departing from the concept of the premise of the invention, various modifications and improvements can be made, these belong to the present invention Protection scope.

Claims (7)

1. a kind of large size A seating drum splayed door type upending frame, which is characterized in that its structure includes lifting support (1), hydraulic dress (2), X axis beam (3), Y-axis beam (4) and boom hoisting (5) are set, lifting support (1) is symmetrical arranged, hydraulic device (2) setting On lifting support (1), X axis beam (3) is horizontally installed on two sides lifting support (1), and Y-axis beam (4) is arranged in X axis beam (3) interlude, boom hoisting (5) is mobile to be arranged on X axis beam (3) and Y-axis beam (4).
2. large size A seating drum splayed door type upending frame according to claim 1, which is characterized in that described liter of valence bracket packet Fixed frame (6), crane (7), sidewall notches (8) are included, fixed frame (6) is square frame-shaped structure, and sidewall notches (8) are symmetrically set The two sides in fixed frame (6) are set, in fixed frame (6), the two sides insertion side wall of crane (7) is recessed for crane (7) setting In slot (8).
3. large-scale A seating drum splayed door type upending frame according to claim 1, which is characterized in that the X axis beam (3) and Y-axis beam (4) structure is identical.
4. large size A seating drum splayed door type upending frame according to claim 3, which is characterized in that the X axis beam (3) And Y-axis beam (4) structure is identical, structure includes beam body (9) and movement groove (10), and beam body (9) is strip structure, mobile Groove (10) is arranged on beam body (9).
5. large size A seating drum splayed door type upending frame according to claim 1, which is characterized in that the boom hoisting (5) include device outrigger (11), shifting roller (12), driving device (13), remote controller (14), take-up and pay-off device (15) and Pulley blocks (16), shifting roller (12) are arranged on device outrigger (11), and are embedded in setting in mobile groove (10), driving dress It sets (13) and connect setting with shifting roller (12), take-up and pay-off device (15) is arranged on device outrigger (11), and pulley blocks (16) are set It sets on device outrigger (11), matches with take-up and pay-off device (15), remote controller (14) is arranged on device outrigger (11), And it is connect respectively with driving device (13) and take-up and pay-off device (15) signal.
6. a kind of construction method for hanging of large size A seating drum splayed door type upending frame, which is characterized in that the method step packet It includes:
(1) device erection is hung with examination
The whole series lifting rack device is set up, examination is carried out after erection and is hung, it is slow by take-up and pay-off device hauling block group Hook up so that drum leave ground to it is quiet hang height when stop it is quiet hang, it is quiet to hang progress band-type brake test without exception, continue pulley blocks It rises and rises to test height, unilateral off the hook correspondingly adjusts band-type brake if any hook phenomenon is slipped, then tests again, until qualified;
(2) hanging apparatus is debugged
According to drum site to be lifted, site height, transverse and longitudinal coordinate information is calculated, constitutes complete lifting site coordinate, Upending frame is debugged according to the coordinate, drives lifting support to carry out height adjustment by hydraulic device, lifting support height is higher than Drum height 2-4m in site to be lifted;
(3) lifting operation
Drum is strapped on pulley blocks, by remote control take-up and pay-off device take-up, until drum is more than lifting site height 50-80cm, control driving device driving shifting roller moves on X axis beam, Y-axis beam, until reaching the cross in lifting site Then ordinate site slowly declines drum, until drum reaches lifting site and can be installed.
7. the construction method for hanging of large size A seating drum splayed door type upending frame according to claim 6, which is characterized in that When step (2) the debugging upending frame, Y-axis beam must be positioned at the surface in installation site.
CN201910722604.XA 2019-08-06 2019-08-06 A kind of large size A seating drum splayed door type upending frame and construction method for hanging Pending CN110395666A (en)

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CN201910722604.XA CN110395666A (en) 2019-08-06 2019-08-06 A kind of large size A seating drum splayed door type upending frame and construction method for hanging

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Application Number Priority Date Filing Date Title
CN201910722604.XA CN110395666A (en) 2019-08-06 2019-08-06 A kind of large size A seating drum splayed door type upending frame and construction method for hanging

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87208440U (en) * 1987-05-27 1988-06-08 李承业 Multiple-functional movable electric lifter for hoisting, pressing and lifting
CN201471300U (en) * 2009-08-21 2010-05-19 潍坊华星铸造机械有限公司 Double-track lifting and hooking frame without changing track
CN201580914U (en) * 2009-12-28 2010-09-15 北京奥宇模板有限公司 Monospar trackless combination gantry crane
US20110247993A1 (en) * 2010-04-13 2011-10-13 Gorbel, Inc. Gantry crane having a truss supported runway
CN202657839U (en) * 2012-06-15 2013-01-09 佛山市南海必得福无纺布有限公司 Vertical rail changing mechanism of suspension type crane
CN204079269U (en) * 2014-08-19 2015-01-07 纽科伦(新乡)起重机有限公司 A kind of crane-suspended track and track exchanging device, slipping mechanism
CN205419542U (en) * 2015-10-13 2016-08-03 宗华实业有限公司 Electronic overhead monorail trades rail device
CN206318614U (en) * 2016-12-23 2017-07-11 上海久隆电力(集团)有限公司 A kind of hydraulic up-down portal frame of the elevator laid for tunnel inner cable
CN107161852A (en) * 2017-06-30 2017-09-15 莱芜环球汽车零部件有限公司 A kind of hydraulic lifting gantry crane
CN108840240A (en) * 2018-06-13 2018-11-20 山西省工业设备安装集团有限公司 Large-scale A seating drum splayed door type upending frame and construction method for hanging

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87208440U (en) * 1987-05-27 1988-06-08 李承业 Multiple-functional movable electric lifter for hoisting, pressing and lifting
CN201471300U (en) * 2009-08-21 2010-05-19 潍坊华星铸造机械有限公司 Double-track lifting and hooking frame without changing track
CN201580914U (en) * 2009-12-28 2010-09-15 北京奥宇模板有限公司 Monospar trackless combination gantry crane
US20110247993A1 (en) * 2010-04-13 2011-10-13 Gorbel, Inc. Gantry crane having a truss supported runway
CN202657839U (en) * 2012-06-15 2013-01-09 佛山市南海必得福无纺布有限公司 Vertical rail changing mechanism of suspension type crane
CN204079269U (en) * 2014-08-19 2015-01-07 纽科伦(新乡)起重机有限公司 A kind of crane-suspended track and track exchanging device, slipping mechanism
CN205419542U (en) * 2015-10-13 2016-08-03 宗华实业有限公司 Electronic overhead monorail trades rail device
CN206318614U (en) * 2016-12-23 2017-07-11 上海久隆电力(集团)有限公司 A kind of hydraulic up-down portal frame of the elevator laid for tunnel inner cable
CN107161852A (en) * 2017-06-30 2017-09-15 莱芜环球汽车零部件有限公司 A kind of hydraulic lifting gantry crane
CN108840240A (en) * 2018-06-13 2018-11-20 山西省工业设备安装集团有限公司 Large-scale A seating drum splayed door type upending frame and construction method for hanging

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Application publication date: 20191101

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