CN103255712A - Device and method suitable for inspecting and maintaining different steel arch bridge arches - Google Patents

Device and method suitable for inspecting and maintaining different steel arch bridge arches Download PDF

Info

Publication number
CN103255712A
CN103255712A CN201310204746XA CN201310204746A CN103255712A CN 103255712 A CN103255712 A CN 103255712A CN 201310204746X A CN201310204746X A CN 201310204746XA CN 201310204746 A CN201310204746 A CN 201310204746A CN 103255712 A CN103255712 A CN 103255712A
Authority
CN
China
Prior art keywords
inspection
steel arch
rope
support device
inspection trolley
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.)
Granted
Application number
CN201310204746XA
Other languages
Chinese (zh)
Other versions
CN103255712B (en
Inventor
刘军
梅仕伟
郭红锋
李文斌
卢瑞林
张小锋
律伟
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.)
Zhuzhou Times New Material Technology Co Ltd
Original Assignee
Zhuzhou Times New Material Technology 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 Zhuzhou Times New Material Technology Co Ltd filed Critical Zhuzhou Times New Material Technology Co Ltd
Priority to CN201310204746.XA priority Critical patent/CN103255712B/en
Publication of CN103255712A publication Critical patent/CN103255712A/en
Application granted granted Critical
Publication of CN103255712B publication Critical patent/CN103255712B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Bridges Or Land Bridges (AREA)

Abstract

The invention discloses a method suitable for inspecting and maintaining different steel arch bridge arches. The method is characterized by including the following steps: (1), according to distribution of inspection nodes of the steel arch bridge arches, several inspection routes are scheduled; (2), guiding supporting devices are arranged near to the inspection nodes on the inspection routes, and inspection vehicle driving devices are arranged at the two ends of a steel arch; (3), ropes are connected with the inspection vehicle driving devices at the two ends through the guiding supporting devices, and inspection vehicles are fixedly arranged on the ropes; (4), the inspection vehicle driving devices are used for driving the inspection vehicles on the ropes to move for inspection and maintenance along the inspection routes in a back and forth mode. The problem that the inspection vehicles are difficult to drive at an incline is solved. The method is suitable for inspecting the different steel arch bridge arches and not limited by shapes of arch bridges. The method for the inspection and the maintenance and a device for the inspection and the maintenance can be used for conveniently and safely inspecting all the nodes of steel beams and are high in efficiency.

Description

Be applicable to the inspection attending device of various steel arch bridge steel arches and check maintaining method
Technical field
The present invention relates to a kind of inspection attending device and inspection maintaining method thereof that is applicable to the different types of rridges bridge arch, relate in particular to a kind of inspection attending device and inspection maintaining method thereof that is applicable to various steel arch bridge steel arches, belong to technical field of bridge engineering.
Background technology
Steel arch bridge particularly super-huge steel arch bridge uses more and more at highway, railway.And steel arch bridge steel arch structure connected node (as bolt, weld seam) can cause damage along with accumulation service time, forms hidden danger.Often the steel arch is checked maintenance, the generation of the disasters such as can preventing that bridge caves in that can scent a hidden danger and adopt remedial measures early.In the actual inspection maintenance process, the steel of steel arch bridge encircles the vertical discrepancy in elevation, and (generally can reach 80~100m), and generally build the high mountain gorge area in, testing fixture is difficult to the operating personnel is sent to the inspection node at the bottom of bridge floor or bridge greatly; Steel arch heavy grade, changes of section is big, and various steel arch bridge steel arch shape is inconsistent, is difficult at the steel arch testing fixture self-driven and the adaptation arch is set.Therefore, the mode that steel arch bridge steel arch can only adopt the people to climb checks maintenance, and this inspection maintenance mode degree of danger is big, checks that to safeguard inconvenience and efficient very low, and the place (inspection blind area) that is difficult to arrive is arranged, thereby make the inspection of steel arch safeguard very difficult.
Summary of the invention
Technical problem to be solved by this invention is, at the defective that exists in the above present inspection maintenance service, a kind of inspection attending device that is applicable to various steel arch bridge steel arches is provided, this inspection attending device can arrange according to the shape of different rigid arch bridge steel arches, uses this inspection attending device can check each girder steel node and efficient height safely, easily.
For solving above technical problem, the technical solution used in the present invention is: be applicable to various rigid arch bridge steel arch the inspection attending device, described inspection attending device comprises the inspection trolley drive unit that is arranged on steel arch two ends, be arranged near the guiding support device of inspection node that checks on the route, described guiding support device can arrange according to different steel arch bridge steel arch shape, the rope that connects the inspection trolley drive unit by described guiding support device, the inspection trolley that is connected with described lanyard, mobile along checking that route comes and goes by the inspection trolley that described inspection trolley drive unit drives on the rope, the inspection personnel can adjust inspection trolley in the position that checks on the route according to the position that checks node, checks maintenance work.
Preferably, described inspection trolley drive unit is two hoist engines, is separately positioned on steel arch two ends, and a hoist engine is received rope, and an other hoist engine is put rope.
Preferably, described inspection trolley drive unit is a hoist engine and a fixed pulley, be separately positioned on steel arch two ends, described rope one end is connected on the hoist engine, an other end successively by described guiding support device and described fixed pulley again wraparound be connected on the described hoist engine.
Preferably, the concrete quantity of described guiding support device is decided according to inspection node situation.
Preferably, the mode of described guiding support device by bolt or welding is separately positioned on bridge pier along described inspection route, the steel arch connecting rod and is arranged on along on the steel arch of described inspection route, described guiding support device comprises directive wheel, and described rope connects the described inspection trolley drive unit at two ends by directive wheel.Described guiding support device supports inspection trolley and rope and limits the trend of rope, guarantees that inspection trolley can move to check the node annex, when inspection trolley moves to a certain inspection node, is supported the weight of inspection trolley by near guiding support device.
Preferably, the spacing distance of adjacent described guiding support device is 10m to 20m, and the weight in working order of inspection trolley is not more than 1000kg.
Preferably, described rope adopts cable wire.
The present invention also provides the inspection maintaining method that uses aforesaid inspection attending device, may further comprise the steps:
1), according to the shape of steel arch bridge steel arch with check the node distribution situation, cook up and contain many of checking node and check routes;
2), guiding support device is arranged near the inspection node that checks on the route, the inspection trolley drive unit is arranged on steel arch two ends;
3), rope is linked to each other with the described inspection trolley drive unit at two ends by described guiding support device, inspection trolley is fixedly installed on the described rope;
4), the inspection trolley that drives on the rope by described inspection trolley drive unit is mobile along checking that route comes and goes, the inspection personnel can adjust inspection trolley in the position that checks on the route according to the position that checks node, check maintenance work;
The testing fixture that arranges on every described inspection route is identical.
Preferably, described inspection trolley drive unit is two hoist engines, is separately positioned on steel arch two ends, and a hoist engine is received rope, and an other hoist engine is put rope.
Preferably, described inspection trolley drive unit is a hoist engine and a fixed pulley, be separately positioned on steel arch two ends, described rope one end is connected on the hoist engine, an other end successively by described guiding support device and described fixed pulley again wraparound be connected on the described hoist engine.
Beneficial effect of the present invention is: the present invention can cook up and contain the inspection route that checks node according to shape and the inspection node distribution situation of different steel arch bridge steel arches, is applicable to the inspection of different types of rridges bridge arch, not limited by the bridge arch shape; Adopt the inspection trolley drive unit to reel the type of drive that rope drives inspection trolley, solve the difficult problem that the inspection trolley heavy grade drives; Use this inspection maintaining method and check that attending device can check each girder steel node and efficient height safely, easily.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1;
Fig. 2 is C portion enlarged diagram among Fig. 1;
Fig. 3 is the schematic diagram of the embodiment of the invention 2;
Among the figure: 1. check node, 2. check route, 3. guiding support device, 4. steel arch, 5. cable wire, 6. inspection trolley, 7. hoist engine, 8. bridge pier, 9. steel arch connecting rod, 10. fixed pulley.
The specific embodiment
Below in conjunction with specific embodiments and the drawings technical scheme of the present invention is further elaborated.
Embodiment 1: as depicted in figs. 1 and 2, be applicable to various rigid arch bridge steel arch the inspection attending device, described inspection attending device comprises and is arranged on the inspection trolley drive unit that steel encircles 4 two ends, be arranged near the guiding support device 3 the inspection node 1 that checks on the route 2, described guiding support device 3 can arrange according to different steel arch bridge steel arch shape, the cable wire 5 that connects the inspection trolley drive unit by described guiding support device 3, the inspection trolley 6 of fixedlying connected with described cable wire 5, mobile along checking that route 2 comes and goes by the inspection trolley 6 that described inspection trolley drive unit drives on the cable wire 5, the inspection personnel can adjust inspection trolley 6 in the position that checks on the route 2 according to the position that checks node 1, checks maintenance work.
Described inspection trolley drive unit is two hoist engines 7, is separately positioned on steel and encircles 4 two ends, and a hoist engine 7 is received cable wire 5, and an other hoist engine 7 is put cable wire 5.
The concrete quantity of described guiding support device 3 is decided according to inspection node 1 situation.
Described guiding support device 3 is separately positioned on bridge pier 8 along described inspection route 2, the steel arch connecting rod 9 by bolted mode and is arranged on along on the steel arch 4 of described inspection route 2, described guiding support device 3 comprises directive wheel, and described cable wire 5 connects the described hoist engine 7 at two ends by directive wheel.Described guiding support device 3 supports inspection trolley 6 and cable wires 5 and limits the trend of cable wire 5, guarantees that inspection trolley 6 can move to check node 1 annex, when inspection trolley 6 moves to a certain inspection node 1, is supported the weight of inspection trolleys 6 by near guiding support device 3.
Adjacent described guiding support device 3 spacing distances are 10m, and the weight in working order of inspection trolley is not more than 1000kg, can guarantee that described guiding support device can support the weight of inspection trolley and inspection most convenient during node this moment.
1), according to inspection node 1 distribution situation of steel arch bridge steel arch the present invention is the inspection maintaining method of the aforesaid inspection attending device of public use also, may further comprise the steps:, cook up and contain many of checking node 1 and check routes 2; Check that an arch bridge needs some to check route 2, be used for checking the inspection node 1 of different azimuth, the present invention can be according to inspection node 1 distribution situation of different steel arch bridge steel arch 4 and steel arch 4, cook up and contain the inspection route 2 that checks node 1, according to actual conditions, be provided with steel node A and check that route and following steel Node B check that two in route checks route 2 in the present embodiment.
2), guiding support device 3 being arranged on A checks and the inspection trolley drive unit to be arranged on steel to encircle 4 two ends near the inspection node 1 on the route 2;
3), cable wire 5 is linked to each other with the described inspection trolley drive unit at two ends by described guiding support device 3, inspection trolley 6 is fixedly installed on the described cable wire 5;
4), driving inspection trolley 6 on the cable wire 5 by described inspection trolley drive unit, to check that along A route 2 comes and goes mobile, the inspection personnel can adjust inspection trolley 6 according to the position that checks node 1 and check at A and position on the route 2 check maintenance work.
The testing fixture that checks route 2 settings at B is identical.
Described inspection trolley drive unit is two hoist engines 7, is separately positioned on steel and encircles 4 two ends, and a hoist engine 7 is received cable wire 5, and an other hoist engine 7 is put cable wire 5.
Described inspection trolley 6 is job platforms that bridge inspection is safeguarded, inspection trolley 6 hangs and is fixed on the cable wire 5, moves along with the movement of cable wire 5.When an end hoist engine 7 reels cable wire 5, an other end hoist engine 7 is put cable wire 5 synchronously, and cable wire 5 traction inspection trolleys 6 are along checking that routes 2 move, and inspection trolley 6 moves to and checks that node 1 annex checks maintenance work.When the rotating that changes two ends hoist engine 7 can realize moving back and forth of cable wire 5, move back and forth along inspection route 2 thereby drive inspection trolley 6, reach the purpose of the inspection node 1 that checks steel arch bridge easily.
Embodiment 2: as shown in Figure 3, compare with embodiment 1, difference only is: described inspection trolley drive unit is a hoist engine 7 and a fixed pulley 10, be separately positioned on steel and encircle 4 two ends, described cable wire 5 one ends are connected on the hoist engine 7, an other end successively by described guiding support device 3 and described fixed pulley 10 again wraparound be connected on the described hoist engine 7.Adjacent described guiding support device 3 spacing distances are 20m.
Described inspection trolley 6 is job platforms that bridge inspection is safeguarded, inspection trolley 6 hangs and is fixed on the cable wire 5, moves along with the movement of cable wire 5.When hoist engine 7 rotated, cable wire 5 rapped around to again on the hoist engine by the fixed pulley 10 of an other end, and cable wire 5 traction inspection trolleys 6 are along checking that route 2 moves, and inspection trolley 6 moves to and checks that node 1 annex checks maintenance work.When the rotating that changes hoist engine 7 can realize moving back and forth of cable wire 5, move back and forth along inspection route 2 thereby drive inspection trolley 6, reach the purpose of the inspection node 1 that checks steel arch bridge easily.
In sum, the present invention adopts the inspection trolley drive unit to reel the type of drive that rope drives inspection trolley, solves the difficult problem that the inspection trolley heavy grade drives; The present invention can cook up and contain the inspection route that all check node according to the inspection node distribution situation of different steel arch bridge steel arch and steel arch, is applicable to the inspection of different types of rridges bridge arch, not limited by the bridge arch shape.Use this inspection maintaining method and check that attending device can check each girder steel node and efficient height safely, easily.
Above embodiment is only for the usefulness that the present invention is described; but not limitation of the present invention; the relevant technologies personnel in relevant field are under the situation that does not break away from the spirit and scope of the present invention; can also make a variety of changes or conversion; therefore all technical schemes that are equal to also belong to protection scope of the present invention, and protection scope of the present invention should be limited by each claim.

Claims (10)

1. be applicable to the inspection attending device of various rigid arch bridge steel arches, it is characterized in that: described inspection attending device comprises the inspection trolley drive unit that is arranged on steel arch two ends, be arranged near the guiding support device of inspection node that checks on the route, described guiding support device can arrange according to different steel arch bridge steel arch shape, the rope that connects the inspection trolley drive unit by described guiding support device, the inspection trolley that is connected with described lanyard, mobile along checking that route comes and goes by the inspection trolley that described inspection trolley drive unit drives on the rope, the inspection personnel can adjust inspection trolley in the position that checks on the route according to the position that checks node, checks maintenance work.
2. inspection attending device according to claim 1, it is characterized in that: described inspection trolley drive unit is two hoist engines, is separately positioned on steel arch two ends, and a hoist engine is received rope, and an other hoist engine is put rope.
3. inspection attending device according to claim 1, it is characterized in that: described inspection trolley drive unit is a hoist engine and a fixed pulley, be separately positioned on steel arch two ends, described rope one end is connected on the hoist engine, an other end successively by described guiding support device and described fixed pulley again wraparound be connected on the described hoist engine.
4. inspection attending device according to claim 1 is characterized in that: the concrete quantity of described guiding support device is according to checking that the node situation decides.
5. according to claim 1,2,3 or 4 described inspection attending devices, it is characterized in that: the mode of described guiding support device by bolt or welding is separately positioned on bridge pier along described inspection route, the steel arch connecting rod and is arranged on along on the steel arch of described inspection route, described guiding support device comprises directive wheel, and described rope connects the described inspection trolley drive unit at two ends by directive wheel; Described guiding support device supports inspection trolley and rope and limits the trend of rope, guarantees that inspection trolley can move to check the node annex, when inspection trolley moves to a certain inspection node, is supported the weight of inspection trolley by near guiding support device.
6. according to claim 1,2,3 or 4 described inspection attending devices, it is characterized in that: the spacing distance of adjacent described guiding support device is 10m to 20m, and the weight in working order of inspection trolley is not more than 1000kg.
7. according to claim 1,2,3 or 4 described inspection attending devices, it is characterized in that: described rope adopts cable wire.
8. use the inspection maintaining method as any described inspection attending device of claim in the claim 1 to 7, it is characterized in that: may further comprise the steps:
1), according to the shape of steel arch bridge steel arch with check the node distribution situation, cook up and contain many of checking node and check routes;
2), guiding support device is arranged near the inspection node that checks on the route, the inspection trolley drive unit is arranged on steel arch two ends;
3), rope is linked to each other with the described inspection trolley drive unit at two ends by described guiding support device, inspection trolley is fixedly installed on the described rope;
4), the inspection trolley that drives on the rope by described inspection trolley drive unit is mobile along checking that route comes and goes, the inspection personnel can adjust inspection trolley in the position that checks on the route according to the position that checks node, check maintenance work;
The testing fixture that arranges on every described inspection route is identical.
9. according to Claim 8 to described inspection maintaining method, it is characterized in that: described inspection trolley drive unit is two hoist engines, is separately positioned on steel arch two ends, and a hoist engine is received rope, and an other hoist engine is put rope.
10. inspection maintaining method according to claim 8, it is characterized in that: described inspection trolley drive unit is a hoist engine and a fixed pulley, be separately positioned on steel arch two ends, described rope one end is connected on the hoist engine, an other end successively by described guiding support device and described fixed pulley again wraparound be connected on the described hoist engine.
CN201310204746.XA 2013-05-29 2013-05-29 Method suitable for inspecting and maintaining different steel arch bridge arches Active CN103255712B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310204746.XA CN103255712B (en) 2013-05-29 2013-05-29 Method suitable for inspecting and maintaining different steel arch bridge arches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310204746.XA CN103255712B (en) 2013-05-29 2013-05-29 Method suitable for inspecting and maintaining different steel arch bridge arches

Publications (2)

Publication Number Publication Date
CN103255712A true CN103255712A (en) 2013-08-21
CN103255712B CN103255712B (en) 2015-04-08

Family

ID=48959896

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310204746.XA Active CN103255712B (en) 2013-05-29 2013-05-29 Method suitable for inspecting and maintaining different steel arch bridge arches

Country Status (1)

Country Link
CN (1) CN103255712B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104343084A (en) * 2014-11-14 2015-02-11 武桥重工集团股份有限公司 Trackless lower chord inspection vehicle for steel truss bridges
CN110042766A (en) * 2019-05-27 2019-07-23 广西大学 A kind of CFST Arch Bridge insulation film construction method

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3526612A1 (en) * 1985-07-25 1987-02-05 Trefilarbed Drahtwerk Bridge cable inspection device
DE3641778C1 (en) * 1986-12-06 1987-09-17 Manfred Dipl-Ing Grassl Apparatus for travelling on ropes or cables of structures, in particular for travelling on the bridge cables of suspension and cable-stayed bridges
EP0514364A1 (en) * 1991-04-16 1992-11-19 H. JUNGER BAUGESELLSCHAFT m.b.H. und Co. KG Apparatus for carrying out inspection and renovation works or the like on undersides of bridges
US20030000414A1 (en) * 1999-12-14 2003-01-02 Yury Sherman System for supporting substantially rigid linear structures
WO2005090685A1 (en) * 2004-02-18 2005-09-29 Klaus Sonnen Device and method for carrying out work on a bridge
CN201040150Y (en) * 2007-05-24 2008-03-26 王敬 High building emergency escaping rescue device
KR20100003434A (en) * 2008-07-01 2010-01-11 이연철 Movable carrier for repairing and maintaining of arch type structure
CN202273179U (en) * 2011-09-28 2012-06-13 中国一冶集团有限公司 High-altitude steel cable suspended working platform for construction and maintenance on outer side of bridge box girder
CN202323703U (en) * 2011-11-23 2012-07-11 中铁三局集团有限公司广州分公司 Beam bottom checking trolley
CN102808379A (en) * 2012-08-22 2012-12-05 株洲时代新材料科技股份有限公司 Device for arch bridge inspection
CN202829358U (en) * 2012-08-21 2013-03-27 向天裕 Cableway transport lifting device

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3526612A1 (en) * 1985-07-25 1987-02-05 Trefilarbed Drahtwerk Bridge cable inspection device
DE3641778C1 (en) * 1986-12-06 1987-09-17 Manfred Dipl-Ing Grassl Apparatus for travelling on ropes or cables of structures, in particular for travelling on the bridge cables of suspension and cable-stayed bridges
EP0514364A1 (en) * 1991-04-16 1992-11-19 H. JUNGER BAUGESELLSCHAFT m.b.H. und Co. KG Apparatus for carrying out inspection and renovation works or the like on undersides of bridges
US20030000414A1 (en) * 1999-12-14 2003-01-02 Yury Sherman System for supporting substantially rigid linear structures
WO2005090685A1 (en) * 2004-02-18 2005-09-29 Klaus Sonnen Device and method for carrying out work on a bridge
CN201040150Y (en) * 2007-05-24 2008-03-26 王敬 High building emergency escaping rescue device
KR20100003434A (en) * 2008-07-01 2010-01-11 이연철 Movable carrier for repairing and maintaining of arch type structure
CN202273179U (en) * 2011-09-28 2012-06-13 中国一冶集团有限公司 High-altitude steel cable suspended working platform for construction and maintenance on outer side of bridge box girder
CN202323703U (en) * 2011-11-23 2012-07-11 中铁三局集团有限公司广州分公司 Beam bottom checking trolley
CN202829358U (en) * 2012-08-21 2013-03-27 向天裕 Cableway transport lifting device
CN102808379A (en) * 2012-08-22 2012-12-05 株洲时代新材料科技股份有限公司 Device for arch bridge inspection

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104343084A (en) * 2014-11-14 2015-02-11 武桥重工集团股份有限公司 Trackless lower chord inspection vehicle for steel truss bridges
CN104343084B (en) * 2014-11-14 2016-04-13 武桥重工集团股份有限公司 The trackless lower edge inspection trolley of a kind of steel purlin bridge
CN110042766A (en) * 2019-05-27 2019-07-23 广西大学 A kind of CFST Arch Bridge insulation film construction method

Also Published As

Publication number Publication date
CN103255712B (en) 2015-04-08

Similar Documents

Publication Publication Date Title
CN205501818U (en) Steel trussed arch bridge bridge tool car
CN103342318B (en) Lifting device for steel truss inspection trolley working platform and installation method thereof
CN202186848U (en) Universal movable maintenance gantry crane
CN202881852U (en) Suspension bridge cable installation system
CN104278637B (en) A kind of main rope of suspension bridge strand is without the cableway erection method in cat road
CN104060835B (en) Lifting-sliding construction method for single plane truss
CN106121257A (en) Component Intelligent transport method and system for assembled architecture
CN105442458A (en) Method for hanging and installing stay cable of cable-stayed bridge special-shaped tower pillar
CN105060123A (en) Travelling crane suspending device and method for valve tower
CN203333185U (en) Trussed gantry crane
CN103255712A (en) Device and method suitable for inspecting and maintaining different steel arch bridge arches
CN103422432B (en) A kind of examination and repair system of single plane cable stayed bridge suspension cable and application thereof
CN110159057A (en) Technological transformation workshop chimney construction method of installation
CN103821084A (en) Beam bottom operation equipment and beam bottom operation method
CN203947758U (en) Novel hydraulic automatic climbing discharging platform
CN102758522A (en) Large-sized stand column extra-column construction platform device and method
CN104452594A (en) Multi-support cable guide method cable replacement device
CN202390129U (en) Over-rail crane device
CN210529487U (en) Bridge and box-shaped bridge inspection device with flange plates
CN201817208U (en) Simple lifting machine
CN103643791A (en) Movable scaffold device for belt gallery
CN106809725A (en) The bottom trolley structure that a kind of large-sized gantry hangs
CN201605110U (en) Device for hoisting waveform steel webs at the front end of truss in cantilever construction
CN203682931U (en) Wharf building crane
CN103654610A (en) Rail type hanging basket

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant