CN202170231U - Mobile pulling bar - Google Patents

Mobile pulling bar Download PDF

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Publication number
CN202170231U
CN202170231U CN2011202314081U CN201120231408U CN202170231U CN 202170231 U CN202170231 U CN 202170231U CN 2011202314081 U CN2011202314081 U CN 2011202314081U CN 201120231408 U CN201120231408 U CN 201120231408U CN 202170231 U CN202170231 U CN 202170231U
Authority
CN
China
Prior art keywords
gib
pedestal
pulley
base
dead man
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.)
Expired - Lifetime
Application number
CN2011202314081U
Other languages
Chinese (zh)
Inventor
柯猛
方春生
陈爱东
高勇刚
罗琴丽
于吉圣
季泽华
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.)
China Construction Science and Industry Corp Ltd
Original Assignee
China Construction Steel Structure Corp 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 China Construction Steel Structure Corp Ltd filed Critical China Construction Steel Structure Corp Ltd
Priority to CN2011202314081U priority Critical patent/CN202170231U/en
Application granted granted Critical
Publication of CN202170231U publication Critical patent/CN202170231U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a mobile pulling bar which belongs to the field of hoisting machines and tools during the construction of steel structures. The pulling bar comprises a base, a lifting rod, two supporting rods, a counterweight part, a chain block mechanism, a pulley block and a hoist, wherein all the parts are arranged on the base and a roller group is arranged at the bottom of the base; the lifting rod is arranged on the base and movably linked with the base; the two supporting rods are respectively arranged on the base, the bottom ends of the supporting rods are movably connected with the base, and the top ends of the supporting rods are respectively movably connected with the lifting rod; the counterweight part is arranged on the base and a counterweight of the lifting rod is arranged on the other side which is corresponding to the connecting point of the lifting rod; the chain block mechanism is arranged on the base and connected with the lifting rod, and can drive the lifting rod to move on the base along the part where the lifting rod is movably connected with the base; the pulley block comprises a plurality of pulleys, and all the pulleys are respectively arranged on the base and the lifting rod; and the hoist is arranged on the base, and a steel wire rope of the hoist penetrates all the pulleys of the pulley block for controlling the free end at the top part of the lifting rod to move. The mobile pulling bar is simple to manufacture and operate, and convenient for disassembly, assembly and reverse transportation, can operate according to the hoisting needs, and further has flexibility, stability and safety.

Description

Portable dead man
Technical field
The utility model relates to Construction of Steel Structure and uses field of tool, relates in particular to a kind of portable dead man that in Construction of Steel Structure, can effectively lift the multispan spatial structure.
Background technology
At present; In the top installation work of annex steel structure; In " mouth " Zee bar steel Z structure of intact construction, inner newly-increased multispan steel column and girder steel be during as roof truss structure (as shown in Figure 1), and large lifting equipment is failed covering; Conventional way is: around set up drag-line or portal frame be set and lift, even adopt the installation of large-tonnage wheel crane.Because newly-increased roof truss part often produces in the later stage, and is more with curtain wall and fitting-out work cross-operation, these equipment of employing, finished product protection can't be protected, and is difficult to obtain economic benefit, causes construction safety technical measures expense to increase.
As shown in Figure 2, present a kind of lifting mode is to accomplish structure top erection support a, drag-line b is fixed on the bearing a, and fixes with bolt c.When member is installed, cucurbit is hung over drag-line top as the lifting fulcrum.This hanging method, bearing is stable high with requirement of strength, and the drag-line bending change is big.
As shown in Figure 3, present another kind lifting mode is in making portal frame d, and portal frame d top cross bar will surpass more than the installation component absolute altitude, and is highly higher, and in the installation process, when lifting through cucurbit e, member f can only be in vertical direction, and swing is limited.
Therefore; Adopt at present the mode of weight-lifting equipment lifting multispan steel column and girder steel to have drawback at least: (1) owing to increase the structure installation around the member, the completion of having constructed of formation hollow region, other structure major part; Local under construction operation can't be satisfied the lifting of the zone of influence; (2) surrounding structure form and height limitation of construction can't utilize wheel crane to carry out the on-site installation construction; (3) for to carry out protection to accomplishing article, accomplishing article top, can't use gauntry crane, the article of not so having accomplished can not get ensureing.
The utility model content
Based on above-mentioned existing in prior technology problem; The purpose of the utility model embodiment provides a kind of portable dead man, is applicable in the constrained environment, and the member little to single construction weight carries out handling easily; And; Can when highly reaching a certain height, can on projected path, carry out fast speed and move and adjust stop position, thereby easily multispan structure effectively lifted according to the lifting needs.
The purpose of the utility model realizes through following technical scheme:
The utility model embodiment provides a kind of portable dead man, comprising:
Pedestal is provided with each parts on it, its bottom is provided with the roller set of carrying and moving this movable type dead man;
Gib, it vertically is arranged on the said pedestal, and this gib bottom and said pedestal flexibly connect;
Two struts vertically are arranged on respectively on the said pedestal, and the bottom of two struts and said pedestal flexibly connect, and the top of two struts flexibly connects with said gib respectively;
Weight member, it is arranged on the said pedestal, is arranged on the opposite side corresponding to said gib point of connection, for said gib carries out counterweight;
Jack mechanism, it is arranged on the said pedestal, is connected with said gib, can drive said gib and move on said pedestal along the position of gib and the flexible connection of said pedestal;
Assembly pulley, it is made up of a plurality of pulleys, and each pulley is separately positioned on said pedestal and the said gib;
Winch, it is arranged on the said pedestal, and the free end that each pulley of the said assembly pulley of steel wire penetrating of this winch is controlled said gib top moves.
The structure of said pedestal is: by the assembled framed structure of shaped steel, be fixed with gib transfer ear, the strut transfer ear that connects strut that connects gib on the framed structure and the jack that connects jack draw ear, and be equipped with steel plate.
The roller set of said base bottom setting is made up of the two groups of rollers in front and back, and every group comprises two through bearing bonded assembly roller formation, and pedestal is located on the bearing of two groups of rollers through the camber axle that the bottom is provided with.
Said gib is provided with the reinforcement steel plate and is drawn otic placode, and second pulley of said assembly pulley and the 3rd pulley; Wherein, The reinforcement steel plate is arranged on the middle part of said gib; Drawn otic placode to be arranged on the gib between said reinforcement steel plate and the said gib top, the 3rd pulley is arranged on said gib top, and second pulley is arranged on the said gib that is drawn otic placode top.
Said second pulley is arranged on said gib through support, forms certain distance between second pulley and the gib.
Said two pole structure are identical; Every strut is fitted together composition by two different steel pipe sockets of diameter; Wherein, inner steel pipe can freely stretch by steel pipe externally, and two steel pipe laps are equipped with the circular port that conveniently penetrates the fixing two steel pipe relative positions of bearing pin.
A strut transfer ear that is provided with on said every strut one end and the said pedestal flexibly connects, and the other end of every strut is connected with said gib through bearing pin.
Said winch fixedly is located on the pedestal through bolt or welding.
Can find out from the technical scheme that above-mentioned the utility model embodiment provides; The portable dead man that the utility model embodiment provides through being arranged on the gib on the pedestal, supports two struts of gib; And along assembly pulley that is provided with on gib and the pedestal and the jack mechanism that cooperates with assembly pulley; Winch with driving gib free end moves has formed a kind of convenience and has moved, and is convenient to operate the mechanism of lifting steel member.This movable type dead man is simple in structure, in the environment of limited space, the steel member is lifted easily, can improve the operating efficiency of steel structure, and reduces construction cost.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the utility model embodiment; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skill in the art; Under the prerequisite of not paying creative work, can also obtain other accompanying drawings according to these accompanying drawings.
The steel structure hoisting scheme drawing that Fig. 1 provides for prior art;
The employing drag-line facility that Fig. 2 provides for prior art are to the scheme drawing of Steel Structure Installation;
The scheme drawing that the gauntry crane facility of the employing that Fig. 3 provides for prior art are installed steel structure;
The structural representation of the portable dead man that Fig. 4 provides for the utility model embodiment;
The base construction scheme drawing of the portable dead man that Fig. 5 provides for the utility model embodiment;
The base framework structural representation of the portable dead man that Fig. 6 provides for the utility model embodiment;
The structural representation of the gib of the portable dead man that Fig. 7 provides for the utility model embodiment;
The structural representation of the strut of the portable dead man that Fig. 8 provides for the utility model embodiment.
The specific embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment of the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the protection domain of the utility model.
To combine accompanying drawing that the utility model embodiment is done to describe in detail further below.
The utility model embodiment provides a kind of portable dead man, can be used in the Construction of Steel Structure, belongs to the hoisting machine tool that Construction of Steel Structure is used; Can be in limited spatial dimension; Easily steel structure is carried out handling and installation, solved these limited spaces and be difficult for using other large-scale hanging device, cause influencing the problem of operating efficiency; As shown in Figure 4, this movable type dead man comprises: pedestal 2, gib 3, two struts 4, weight member 6, jack mechanism 7, assembly pulley 8 and winchs 3;
Wherein, each parts is set on the pedestal 2, pedestal 2 bottoms are provided with the roller set 1 of carrying and moving this movable type dead man;
Gib 5 vertically is arranged on the said pedestal 2, and these gib 5 bottoms and said pedestal 2 flexibly connect, and the position that the free end at gib 5 tops can be connected along the bottom on the pedestal 2 is free movable;
Two struts 4 vertically are arranged on respectively on the said pedestal 2, and the bottom of two struts 4 and said pedestal 2 flexibly connect, and the top of two struts 4 flexibly connects with said gib 5 respectively; Distribution triangular in shape between the bottom of the bottom of two struts 4 and gib 5;
Weight member 6, it is arranged on the said pedestal 2, is arranged on the opposite side corresponding to said gib 5 point of connection, for said gib 5 carries out counterweight;
Jack mechanism 7, it is arranged on the said pedestal 2, is connected with said gib 5, can drive said gib 5 and move on said pedestal 2 along gib 5 and the position that said pedestal 2 flexibly connects;
Assembly pulley 8, it is made up of a plurality of pulleys, and each pulley is separately positioned on said pedestal 2 and the said gib 5;
Winch 3, it is arranged on the said pedestal 2, and the free end that each pulley of the said assembly pulley 8 of the steel wire penetrating of this winch 3 is controlled said gib 5 tops moves.
Above-mentioned portable dead man is simple in structure, and parts are few, when lifting is used, sets up, dismantles very convenient, can on projected path, carry out fast speed and move and adjust stop position according to the lifting needs.Be applied in the number of components less; Single construction weight not quite, in the Construction of Steel Structure that highly reach a certain height; Can be according to the lifting needs; On projected path, steel structure (or steel member) is carried out fast speed and move and adjust stop position, thereby easily multispan structure is effectively lifted.
The structure of the pedestal 2 of above-mentioned portable dead man is like Fig. 5, shown in 6; Specifically comprise: by the assembled framed structure of shaped steel; Be fixed with gib transfer ear 26, the strut transfer ear 24 that connects strut that connects gib on the framed structure and the jack that connects jack draw ear 23; And be equipped with steel plate 22, on the steel plate between gib transfer ear 26 and the strut transfer ear 24, be provided with the pulley 81 of assembly pulley 8.The roller set 1 that pedestal 2 bottoms are provided with is made up of the two groups of rollers in front and back, and every group comprises two through bearing 13 bonded assembly rollers formation, and pedestal 2 is located on the bearing 11 of two groups of rollers through the camber axle 27 that the bottom is provided with.
Gib 5 structures of above-mentioned portable dead man are as shown in Figure 7, and gib 5 is provided with reinforcement steel plate 51 and is drawn otic placode 52, and second pulley 82 of said assembly pulley 8 and the 3rd pulley 83; Wherein, Reinforcement steel plate 51 is arranged on the middle part of said gib 5; Drawn otic placode 52 to be arranged on the gib between said reinforcement steel plate 52 and said gib 5 tops; The 3rd pulley 83 is arranged on said gib 5 tops, and second pulley 82 is arranged on the said gib 5 that is drawn otic placode 52 tops.Wherein, second pulley 82 of assembly pulley 8 is arranged on said gib through support, forms certain distance between second pulley 82 and the gib 5.
In the above-mentioned portable dead man; Two pole structure are identical; The structure of every strut 4 is as shown in Figure 8, is sleeved on together by two different steel pipes 41,42 of diameter and forms, wherein; Inner steel pipe 42 can freely stretch in the steel pipe 41 externally, and two steel pipe laps are equipped with the circular port that conveniently penetrates bearing pin 43 fixing two steel pipe relative positions.Wherein, a strut transfer ear 24 that is provided with on every strut 4 one end and the said pedestal 2 flexibly connects, and the other end of every strut 4 is connected with said gib 5 through bearing pin.
The winch of above-mentioned portable dead man fixedly is located on the pedestal through bolt or welding, and the steel rope running orbit of winch passes assembly pulley, the gib transfer ear on the pedestal; And the position that the counterweight device is provided with and gib play the effect of counterweight balance the point of connection on the pedestal corresponding (promptly being arranged on the opposite side of point of connection on gib and the pedestal) to whole portable dead man.
Following structure specific embodiment and use specify above-mentioned portable dead man.
The portable dead man of present embodiment can be used for " mouth " Zee bar steel Z structure of intact construction, in the inner construction when increasing multispan steel column and girder steel as roof truss structure newly; The structure of this movable type dead man is specifically as shown in Figure 4, comprising: roller set 1, pedestal 2; Winch 3; Strut 4, gib 5, weight member 6, assembly pulley 8 and jack mechanism 7;
Wherein, each parts all is arranged on the pedestal 2, and the steel rope 31 of winch 3 passes on the pedestal 2 second pulley 82 and the 3rd pulley 83 on otic placode 52 and the gib 5 that drawn that is provided with on first pulley 11, gib of the assembly pulley 8 that is provided with.
Said strut 4 is sleeved on by steel pipe fitting 41 and 42 and constitutes retractable structure together, and the strut transfer ear 24 that is provided with on strut 4 one ends and the pedestal 2 is connected, and the other end and gib 5 are connected through bearing pin.
The gib transfer ear that is provided with on gib 5 bottoms and the pedestal 2 26 is connected through bearing pin.
Said counterweight 6 is fixed on the pedestal 2, is oppositely arranged with the attachment point of gib 5, plays the effect that counterweight keeps balance.
Said jack mechanism 7 connects pedestals 2 and gibs 5, specifically is the jack that its jack is connected pedestal 2 is drawn being drawn between the otic placode 52 of ear 23 and gib 5.
Winch 3 in the above-mentioned portable dead man can be through being bolted on the pedestal.
Roller set 1 front and back of the base bottom of above-mentioned portable dead man distribute; Connect every group and comprise two rollers; Two rollers of every group connect through bearing, and pedestal 2 bottoms are provided with camber fagging 27, and pedestal 2 is arranged on through camber support 27 on the bearing 11 of roller set 1 (as shown in Figure 6); Said pedestal 2 is a structural steel frame, and steel plate 22 is set on structural steel frame, is respectively equipped with jack on the steel plate 22 and draws associate members such as ear 23, strut transfer ear 24, assembly pulley 81 and gib transfer ear 26; In the reality, pedestal 2 specifically is after being assembled into framed structure by shaped steel, shaped steel to be welded into pedestal 2, and each associate member is welded on respectively on the shaped steel, again steel plate 22 is laid on the integral structure (referring to Fig. 5,6) that forms on the framed structure of shaped steel afterwards.
Said gib 5 is to be made up of steel pipe, and gib 5 is provided with reinforcement steel plate 51, drawn otic placode 52, second pulley 82, the 3rd pulley 83 are formed.Wherein, Reinforcement steel plate 51 is arranged on the middle part of gib 5, and reinforcement steel plate 51 both sides can be provided with the reinforcement steel pipe, plays the effect of strengthening gib intensity; The gib of reinforcement steel plate 51 tops is provided with and is drawn otic placode 52; The assembly pulley 8 and second pulley 82 are located at and are drawn otic placode 52 tops, and second pulley 82 is arranged on the gib 5 through support, and forms certain distance between gib 5 bodies of rod; Avoid the steel rope of winch to contact with the steel pipe of gib 5 and cause wearing and tearing, the 3rd pulley 83 of assembly pulley 8 is located at gib 5 ends; Also be provided with the otic placode 53 that connects two struts below the reinforcement steel pipe.(concrete structure is referring to Fig. 7).
Above-mentioned strut 4 is to be sleeved on together by two different two steel pipes 41,42 of diameter to constitute, and steel pipe 42 diameters can make the steel pipe 42 of minor diameter put in the large diameter steel pipe 41 less than steel pipe 41, and steel pipe 42 can freely be stretched in steel pipe 41.At two steel pipes, 41,42 overlapping parts, all offer circular port, be convenient to penetrate in the circular port through bearing pin 43, thus control two steel pipes 41,42 flexiblely play the fixedly effect of gib 5 (specifically referring to Fig. 8)
The portable dead man of present embodiment is made with simple to operate, and dismounting and have bad luck convenience can be carried out fast speed and move and adjust stop position according to the lifting needs on projected path, have alerting ability, stability and safety.
Real process below in conjunction with utilizing portable dead man lifting specifies above-mentioned portable dead man:
When member is installed, select needed construction area, prepare the assembling mobile dead man.At first, be placed on the operating surface camber support 27 location of roller set 1 according to pedestal 2; Be put into pedestal 2 on the roller set 1 then.The bearing pin of its gib 5 lower ends through diameter 30mm is connected with gib transfer ear 26 on the pedestal 2.Winch 3 is installed in jack and draws on pedestal 2 cross bars in the middle of the ear 23, and on second assembly pulley 82 and second pulley 83 with the assembly pulley on the steel wire penetrating pedestal 28, gib transfer ear 26 and gib 5.
That utilizes that the hook of the jack of jack mechanism 7 directly hooks gib 5 is drawn otic placode 52, and the jack that the other end ties up jack at pedestal 2 draws on the ear 23, pulls the jack cucurbit with gib 5 free pull-ups, and moves the height and the scope of lifting appointment to.After strut 4 installed, strut 4 lower ends were connected with strut transfer ear 23 on the pedestal 2, and strut 4 upper ends are connected with gib 5 through bearing pin.
When member uses, according to lifting components weight, counterweight is fixed on the shaped steel of pedestal 2 at winch 3 rear portions, the same with conventional hanging device, the portable dead man of manual operation is operated winch at every turn, and the inspection gib tilts.
Can know that through above-mentioned introduction each major part of portable dead man among the utility model embodiment is to assemble through bearing pin to form, make, dismounting and have bad luck convenience with simple to operate to installation process.Have following advantage:
(1) in effective lifting scope, receives the workyard limitations affect less, can effectively lift multispan structure.
(2) can on projected path, carry out fast speed and move and adjust stop position according to the lifting needs.
(3) local method when being difficult to use regular elevator machinery lifts, and compares with gantry dead man with cantilever gin pole to have more alerting ability, steadily qualitative and safety.
(4) cost is low: less in the number of components, and when single construction weight is little, adopt wheel crane to install, expense is higher.
In sum, the portable dead man among the utility model embodiment can reduce the danger of special construction lifting; Help accelerating the single-piece construction speed, compare traditional hanging device, safe, fast, efficient; And effectively reduce labor cost, remarkable in economical benefits.
The above; Be merely the preferable specific embodiment of the utility model; But the protection domain of the utility model is not limited thereto; Any technical personnel of being familiar with the present technique field is in the technical scope that the utility model discloses, and the variation that can expect easily or replacement all should be encompassed within the protection domain of the utility model.Therefore, the protection domain of the utility model should be as the criterion with the protection domain of claims.

Claims (8)

1. a portable dead man is characterized in that, comprising:
Pedestal is provided with each parts on it, its bottom is provided with the roller set of carrying and moving this movable type dead man;
Gib, it vertically is arranged on the said pedestal, and this gib bottom and said pedestal flexibly connect;
Two struts vertically are arranged on respectively on the said pedestal, and the bottom of two struts and said pedestal flexibly connect, and the top of two struts flexibly connects with said gib respectively;
Weight member, it is arranged on the said pedestal, is arranged on the opposite side corresponding to said gib point of connection, for said gib carries out counterweight;
Jack mechanism, it is arranged on the said pedestal, is connected with said gib, can drive said gib and move on said pedestal along the position of gib and the flexible connection of said pedestal;
Assembly pulley, it is made up of a plurality of pulleys, and each pulley is separately positioned on said pedestal and the said gib;
Winch, it is arranged on the said pedestal, and the free end that each pulley of the said assembly pulley of steel wire penetrating of this winch is controlled said gib top moves.
2. portable dead man according to claim 1 is characterized in that, the structure of said pedestal is:
By the assembled framed structure of shaped steel, be fixed with gib transfer ear, the strut transfer ear that connects strut that connects gib on the framed structure and the jack that connects jack draw ear, and be equipped with steel plate.
3. portable dead man according to claim 1; It is characterized in that; The roller set of said base bottom setting is made up of the two groups of rollers in front and back, and every group comprises two through bearing bonded assembly roller formation, and pedestal is located on the bearing of two groups of rollers through the camber axle that the bottom is provided with.
4. portable dead man according to claim 1 is characterized in that, said gib is provided with the reinforcement steel plate and is drawn otic placode, and second pulley of said assembly pulley and the 3rd pulley; Wherein, The reinforcement steel plate is arranged on the middle part of said gib; Drawn otic placode to be arranged on the gib between said reinforcement steel plate and the said gib top, the 3rd pulley is arranged on said gib top, and second pulley is arranged on the said gib that is drawn otic placode top.
5. portable dead man according to claim 4 is characterized in that, said second pulley is arranged on said gib through support, forms certain distance between second pulley and the gib.
6. portable dead man according to claim 1; It is characterized in that; Said two pole structure are identical, and every strut is fitted together composition by two different steel pipe sockets of diameter, wherein; Inner steel pipe can freely stretch by steel pipe externally, and two steel pipe laps are equipped with the circular port that conveniently penetrates the fixing two steel pipe relative positions of bearing pin.
7. portable dead man according to claim 1 is characterized in that, a strut transfer ear that is provided with on said every strut one end and the said pedestal flexibly connects, and the other end of every strut is connected with said gib through bearing pin.
8. portable dead man according to claim 1 is characterized in that, said winch fixedly is located on the pedestal through bolt or welding.
CN2011202314081U 2011-07-01 2011-07-01 Mobile pulling bar Expired - Lifetime CN202170231U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011202314081U CN202170231U (en) 2011-07-01 2011-07-01 Mobile pulling bar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011202314081U CN202170231U (en) 2011-07-01 2011-07-01 Mobile pulling bar

Publications (1)

Publication Number Publication Date
CN202170231U true CN202170231U (en) 2012-03-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011202314081U Expired - Lifetime CN202170231U (en) 2011-07-01 2011-07-01 Mobile pulling bar

Country Status (1)

Country Link
CN (1) CN202170231U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103434967A (en) * 2013-08-31 2013-12-11 国家电网公司 Storage power station trash rack overhauling lifting device
CN104444879A (en) * 2014-11-19 2015-03-25 国家电网公司 Simple and easy equipment hoister used for maintaining electric equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103434967A (en) * 2013-08-31 2013-12-11 国家电网公司 Storage power station trash rack overhauling lifting device
CN103434967B (en) * 2013-08-31 2015-10-14 国家电网公司 Storage station's trash rack maintenance lifting appliance
CN104444879A (en) * 2014-11-19 2015-03-25 国家电网公司 Simple and easy equipment hoister used for maintaining electric equipment

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Granted publication date: 20120321