CN105244788A - Lifting overhauling tool special for handcart breaker in switch room - Google Patents

Lifting overhauling tool special for handcart breaker in switch room Download PDF

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Publication number
CN105244788A
CN105244788A CN201510660898.XA CN201510660898A CN105244788A CN 105244788 A CN105244788 A CN 105244788A CN 201510660898 A CN201510660898 A CN 201510660898A CN 105244788 A CN105244788 A CN 105244788A
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CN
China
Prior art keywords
arm
circuit breaker
service kit
switch gear
special lifting
Prior art date
Application number
CN201510660898.XA
Other languages
Chinese (zh)
Other versions
CN105244788B (en
Inventor
葛景璞
金超
张伟
左雷鹏
王贺英
孙林
郑帅
卢保民
张恒锐
李学军
刘树元
Original Assignee
国家电网公司
国网河北省电力公司
国网河北省电力公司保定供电分公司
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Priority to CN201510660898.XA priority Critical patent/CN105244788B/en
Publication of CN105244788A publication Critical patent/CN105244788A/en
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Publication of CN105244788B publication Critical patent/CN105244788B/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B3/00Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
    • 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
    • B66C23/16Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements

Abstract

The invention provides a lifting overhauling tool special for a handcart breaker in a switch room. The lifting overhauling tool comprises a base, vertical rods, a moment arm, a hook and a hydraulic pump, wherein the base is used for providing a support; the vertical rods are arranged at the upper end of the base; one end of the moment arm is in hinge connection with the top ends of the vertical rods; the hook is connected with the other end of the moment arm; and the hydraulic pump is arranged between the vertical rods and the moment arm, and used for providing lifting force. Through adoption of the lifting overhauling tool special for the handcart breaker in the switch room provided by the invention, the current situation that large-sized hoisting machinery such as conventional cranes and forklifts cannot enter the switch room to overhaul the handcart breaker is changed. The special lifting overhauling tool provided by the invention can be folded during transportation and while entering and exiting from the switch room in order to be carried and moved in a size reducing form. When the special lifting overhauling tool is moved into the switch room, the lifting overhauling tool is unfolded as required to realize overhauling of the handcart breaker.

Description

The special lifting service kit of handcart circuit breaker in a kind of switch gear room

Technical field

The invention belongs to apparatus for examination and repair technical field, specifically, the present invention relates to the special lifting service kit of handcart circuit breaker in a kind of switch gear room.

Background technology

Handcart circuit breaker is the power equipment often used in switch gear room, and its quantity is in rising trend.According to ASSOCIATE STATISTICS, the defect that handcart circuit breaker occurs has 30% in the bottom of handcart type breaker, these defects comprise mechanical part, electric loop in chassis, and the insulated tension pole, arc control device, buffer etc. bottom circuit breaker, need circuit breaker to transfer on the ground from handcart when processing this type of defect or fixed platform was fallen.Because circuit breaker is all-metal material, monomer weight is at 180 ~ 250kg, handcart height is at about 80cm, and narrow space and be around all charging equipment in switch gear room, the large scale hoisting machinery such as crane, fork truck can not enter, so when there is above-mentioned defect when handcart circuit breaker, need service work personnel by manpower by handcart circuit breaker from handcart move down fell after carry out service work.Minimum needs 6 maintainer's cooperative cooperatings in this handling process, and very easily slip out of the hand, causing the serious consequence broken by equipment and maintainer injured by a crashing object, there is great potential safety hazard in this work.

Some lifting maintenance units about circuit breaker are now commercially there are, if the applying date is on December 11st, 2009, application number is 200920144399.5, name is called the patent document of " large-current high-voltage circuit breaker boom hoisting ", the boatswain chair body of its boom hoisting is provided with the screw that can be arranged on large-current high-voltage AC circuit breaker framework, described boatswain chair body is right-angled triangle, the middle part hollow out of boatswain chair body described in this, be formed with the Heave Here of three diverse locations, two right-angle sides of described boatswain chair body are provided with the flange perpendicular with this boatswain chair body plane, adopt the large-current high-voltage circuit breaker boom hoisting of this patent document, owing to which employs triangular structure, make the security performance of boatswain chair reliable, stability is high, lifting circuit breaker weight reaches 800Kg, and hollow out thus alleviate hoisting board weight in the middle part of this boatswain chair, also makes it easy for installation, but directly can draw from this patent document, the boom hoisting of this patent document is only used for lifting by crane circuit breaker, in overhaul of line breaker without any the data of worth reference.For another example the applying date is on December 16th, 2011, application number is 201120531587.0, name is called the patent document of " circuit breaker chassis erecting device ", this erecting device comprises the base that wheel is equipped with in bottom, base is provided with two and is parallel to each other and the relative channel steel shape vertical pillars of notch, cylinder or oil cylinder is provided with between two columns, cylinder or oil cylinder are fixed with lifting frame etc., this erecting device can utilize cylinder or oil cylinder lifting circuit breaker, realize one man operation and reduce labour, enhance productivity; When but this erecting device is only only applicable to install circuit breaker, cannot use for reference in the maintenance of handcart circuit breaker in switch gear room, narrow space in switch gear room and be around all charging equipment, the large scale hoisting machineries such as crane, fork truck (as circuit breaker ground jiggering erecting device) can not enter.

Summary of the invention

The object of the present invention is to provide the special lifting service kit of handcart circuit breaker in a kind of switch gear room, the large scale hoisting machinery such as crane, fork truck existed at least to solve prior art cannot enter the technical problem that switch gear room's rival car circuit breaker carries out overhauling.

In order to solve the problem, the invention provides the special lifting service kit of handcart circuit breaker in a kind of switch gear room, its technical scheme is as follows:

The special lifting service kit of handcart circuit breaker in a kind of switch gear room, comprises pedestal, for providing support; Vertical rod, is arranged on the upper end of described pedestal; The arm of force, one end of the described arm of force and the top of described vertical rod are articulated and connected; Hook, is connected with the other end of the described arm of force; And hydraulic pump, be arranged between described vertical rod and the described arm of force, for providing lifting force.

The special lifting service kit of handcart circuit breaker in switch gear room described above, more preferably: also comprise multiple universal wheel, described universal wheel is arranged on the lower end of pedestal.

The special lifting service kit of handcart circuit breaker in switch gear room described above, more preferably: also comprise multiple brake, multiple described brake and multiple described universal wheel one_to_one corresponding are arranged, for carrying out spacing to described universal wheel.

The special lifting service kit of handcart circuit breaker in switch gear room described above, more preferably: described pedestal comprises supporting base; Support carriers, is articulated and connected with described supporting base; And limit shaft, for carrying out spacing to described support carriers when supporting.

The special lifting service kit of handcart circuit breaker in switch gear room described above, more preferably: on described supporting base, be provided with limiting stand, the described support carriers for doubling poststack is carried out spacing.

The special lifting service kit of handcart circuit breaker in switch gear room described above, more preferably: described supporting base is frame structure, be made up of four arms, second arm is fixedly connected with the first arm with one end of the 3rd arm, and the second arm is connected with the 4th arm with the other end of the 3rd arm.

The special lifting service kit of handcart circuit breaker in switch gear room described above, more preferably: described second arm and the distance of described 3rd arm between described first arm are less than described second arm and the distance of described 3rd arm between described 4th arm.

The special lifting service kit of handcart circuit breaker in switch gear room described above, more preferably: described support carriers is two support bars, a described support bar and described second arm are articulated and connected, and support bar described in another root and described 3rd arm are articulated and connected.

The special lifting service kit of handcart circuit breaker in switch gear room described above, more preferably: the described arm of force is the scalable arm of force.

The special lifting service kit of handcart circuit breaker in switch gear room described above, more preferably: described hydraulic pump is hydraulic hand-pump.

Analyze known, compared with prior art, advantage of the present invention and beneficial effect are:

One, in switch gear room provided by the invention, the special lifting service kit of handcart circuit breaker changes the large scale hoisting machinery such as conventional cranes, fork truck and cannot enter the present situation that switch gear room's rival car circuit breaker carries out overhauling, special lifting service kit provided by the invention is when transportation and turnover switch gear room, can be folded up, be undertaken carrying and moving by the form reducing its volume; When special lifting service kit is moved to switch gear room, launched the maintenance realizing rival car circuit breaker as required.Its folded part, when reality lifting circuit breaker, launches to stablize and is lifted by crane, drops to inspection platform by circuit breaker, complete service work by service kit.Greatly reduce maintainer's quantity like this, reduce staff by the risk injured, improve operating efficiency.

Two, the multiple described universal wheel of the present invention's setting, can move special lifting service kit when needs.

Three, described pedestal is divided into described supporting base and described support carriers by the present invention, provides enough large support force like this when special lifting service kit uses, and saves take up room when special lifting service kit does not use.

Four, described supporting base is set to frame structure by the present invention, can alleviate again the overall weight of special lifting service kit while meeting requirement of strength.

Accompanying drawing explanation

Fig. 1 be the preferred embodiment of the present invention switch gear room in the structural representation (during use) of the special lifting service kit of handcart circuit breaker.

Fig. 2 be the preferred embodiment of the present invention switch gear room in the structural representation (folding time) of the special lifting service kit of handcart circuit breaker.

Fig. 3 is the structural representation of the supporting base of the preferred embodiment of the present invention.

In figure, 1-hydraulic pump; The 2-arm of force; 3-universal wheel; 4-supporting base; 41-limiting stand; 42-first arm; 421-first fixing point; 422-second fixing point; 43-second arm; 44-the 3rd arm; 45-the 4th arm; 5-support carriers; 6-vertical rod; 7-links up with; 8-first jointed shaft; 9-limit shaft; 10-second jointed shaft.

Embodiment

Below in conjunction with the drawings and specific embodiments, the present invention is described in further details.

As shown in Figure 1, in the switch gear room of the preferred embodiment of the present invention, the special lifting service kit of handcart circuit breaker mainly comprises pedestal, for providing support; Vertical rod 6, is arranged on the upper end of pedestal; The arm of force 2, one end of the arm of force 2 and the top of vertical rod 6 are articulated and connected; Hook 7, is connected with the other end of the arm of force 2; With hydraulic pump 1, be arranged between vertical rod 6 and the arm of force 2, for providing lifting force.In the present invention, the arm of force 2 and vertical rod 6 are hingedly connected together by the second jointed shaft 10.

Generally speaking, in switch gear room provided by the invention, the special lifting service kit of handcart circuit breaker can onsite application, and easy to carry, has reliable and practical feature.The present invention uses articulated manner to connect by between vertical rod 6 and the arm of force 2, and be connected between vertical rod 6 and the arm of force 2 by a hydraulic pump 1 again, can raise or reduce the arm of force 2 by stretching out of the hydraulic stem of hydraulic pump 1 like this, the actual needs of handcart can be met, moreover, when not in use, can the hydraulic stem of hydraulic pump 1 be retracted in the body of hydraulic pump 1 completely, now define and be folded with, decrease and take up room; Invention also saves manpower, shorten the repair time, improve operating efficiency.

The conveniently movement of special lifting service kit of the present invention, as shown in Figure 1, the present invention also comprises multiple universal wheel 3, and universal wheel 3 is arranged on the lower end of pedestal.Like this, when needs move special lifting service kit, as long as promotion vertical rod 6 or pedestal just can realize the movement of overall special lifting service kit, just can use manpower and material resources sparingly in this case, without the need to too many people, special lifting service kit be moved.More preferably: also comprise multiple brake (not shown), multiple brake and multiple universal wheel 3 one_to_one corresponding are arranged, for carrying out spacing to universal wheel 3.Like this when special lifting service kit moves by needs, remove brake to the restriction of universal wheel 3, just can carry out the movement of special lifting service kit; When overhauling the indoor handcart circuit breaker of switch, now need special lifting service kit to fix, universal wheel 3 limits by apply the brakes device, and special lifting service kit just can be made to fix.

Time special lifting check man has use, when also having stand-by, in use, should make that the supporting and space of pedestal is larger just can provide enough support forces; But treating that the used time considers joint space-efficient problem again; Based on this, as shown in Figure 1 and Figure 2, pedestal of the present invention comprises supporting base 4, and supporting base 4 is for providing main support; Support carriers 5, is articulated and connected with supporting base 4, and support carriers 5 is for providing supplemental support; With limit shaft 9, when supporting base 4 placement parallel with support carriers 5 (when also support carriers 5 plays supplemental support effect), for carrying out spacing to support carriers 5.In the present invention, supporting base 4 and support carriers 5 are hingedly connected together by the first jointed shaft 8.As shown in Figure 1 and Figure 2, preferably on supporting base 4, be provided with limiting stand 41, the support carriers 5 for doubling poststack is carried out spacing.In order to realize the movement of special lifting service kit when support carriers 5 keeps flat or time folding, as shown in Figure 1 and Figure 2, universal wheel 3 of the present invention is six, and wherein four are arranged on the below of supporting base 4; Two other is arranged on the end of support carriers 5.

Under the prerequisite that can meet requirement of strength, how weight reduction should be considered, based on this, as shown in Figure 1, Figure 3, supporting base 4 of the present invention is frame structure, comprise the first arm 42, the first arm 42 is provided with two fixing points (i.e. the first fixing point 421 and the second fixing point 422); Be preferably two fixing points and the first arm 42 is divided into three parts; Second arm 43, a fixed point of one end and the first arm 42 fixedly realizes the connection of the second arm 43 and the first arm 42; 3rd arm 44, another bearing of one end and the first arm 42 fixedly realizes the connection of the 3rd arm 44 and the first arm 43; The two ends of the 4th arm the 45, four arm 45 are fixedly connected with the other end of the 3rd arm 44 with the other end of the second arm 43 respectively.Distance between two fixing points of more preferably the first arm 42 is 50cm, and the length of the 4th arm 45 is 90cm.Adopt and arrange in this way (namely open type is arranged), bulk strength needs can be met.Support carriers 5 of the present invention is two calcaneus branches struts, and a support bar and the second arm 43 are articulated and connected, and another root support bar and the 3rd arm 44 are articulated and connected.Why support carriers 5 is designed to two support bars by the present invention, and support carriers 5 up can be rolled over again while by the arm of force 2 times foldings, two collapsible designs, make whole special lifting service kit take up room little, can also in small space movement flexibly.

In order to encounter ground when can realize the arm of force 2 times foldings, and hook 7 can be made to reach best mounting position, the arm of force 2 of the present invention is the scalable arm of force.Like this can when pedestal be fixing, by controlling the flexible control realized hook 7 of the arm of force 2.Be preferably the arm of force 2 and comprise matrix bar (not shown) and expansion link (not shown), expansion link is slideable to be plugged in matrix bar, and hook 7 is articulated in the external part place of expansion link.When in conjunction with can the stretching of the arm of force 2, maximum sling height of the present invention reaches 235cm.

In the present invention, hydraulic pump 1 is hydraulic hand-pump, and in narrow space, employing hydraulic hand-pump is more conducive to the control to field condition.The energy of hydraulic pump of the present invention can reach 8t; The body of hydraulic pump 1 is that square steel is made, and the length and width of the body of hydraulic cylinder 1 are respectively 60mm and 70mm.In order to the energy that hydraulic pump can be made to provide enough, the body thickness of hydraulic pump 1 of the present invention is 3mm.Like this when hydraulic pump 1 folds, flexible transport can be realized, take up room little feature.

In the present invention, the steel pivot pin of the first jointed shaft 8 and the second jointed shaft 10 to be all diameters be 15mm, fully can ensure load bearing stength like this.Moreover, in order to can load-bearing sufficient intensity, universal wheel 3 of the present invention for diameter be the steel universal wheel of 8cm.

As shown in Figure 1 and Figure 2, the course of work of the present invention is described in further details.

When in switch gear room, the special lifting service kit of handcart circuit breaker leaves unused, as shown in Figure 2, the expansion link of the arm of force 2 bounces back in the matrix bar of the arm of force 2, and the extension bar of hydraulic pump 1 bounces back in the body of hydraulic pump 1 simultaneously; Support carriers 5 is up rolled over by the effect of the first jointed shaft 8, drops on limiting stand 41 place of supporting base 4; This shows, the present invention adopts manual hydraulic pump 1 as Power output, utilizes lever principle to carry out slinging work, can remain on the height of needs; Have employed in base bottom the universal wheel 3 (being that 4 universal wheels 3 land after folding) that 6 have brake function, realize firm support; The arm of force 2 has 4 adjusting positions, according to the size of lifting weight of object, can carry out flexible; Entirety have employed pivot pin composite type design (first jointed shaft 8 and the second jointed shaft 10), detachably, flexibly and easily; Primary load bearing supports (supporting base 4 and support carriers 5) and adopts collapsible design, takes up room little, can in small space movement flexibly.

When in switch gear room, the special lifting service kit of handcart circuit breaker works, as shown in Figure 1,2 universal wheels 3 bottom support carriers 5 land, and realize more firm supporting role; The hydraulic stem height as required of hydraulic pump 1 stretches out, and the arm of force 2 length is as required stretched out, and can finish the work as the case may be; After work completes, when special for handcart circuit breaker in switch gear room lifting service kit can be folded into idle state again.

Analyze known, compared with prior art, advantage of the present invention and beneficial effect are:

One, in switch gear room provided by the invention, the special lifting service kit of handcart circuit breaker changes the large scale hoisting machinery such as conventional cranes, fork truck and cannot enter the present situation that switch gear room's rival car circuit breaker carries out overhauling, special lifting service kit provided by the invention is when transportation and turnover switch gear room, can be folded up, be undertaken carrying and moving by the form reducing its volume; When special lifting service kit is moved to switch gear room, launched the maintenance realizing rival car circuit breaker as required.Its folded part, when reality lifting circuit breaker, launches to stablize and is lifted by crane, drops to inspection platform by circuit breaker, complete service work by service kit.Greatly reduce maintainer's quantity like this, reduce staff by the risk injured, improve operating efficiency.

Two, the present invention is provided with multiple universal wheel 3, can move when needs to special lifting service kit.

Three, pedestal is set to supporting base 4 and support carriers 5 by the present invention, provides enough large support force like this when special lifting service kit uses, and saves take up room when special lifting service kit does not use.

Four, supporting base 4 is set to frame structure by the present invention, can alleviate again the overall weight of special lifting service kit while meeting requirement of strength.

As known by the technical knowledge, the present invention can be realized by other the embodiment not departing from its Spirit Essence or essential feature.Therefore, above-mentioned disclosed embodiment, with regard to each side, all just illustrates, is not only.Within the scope of the present invention all or be all included in the invention being equal to the change in scope of the present invention.

Claims (10)

1. the special lifting service kit of handcart circuit breaker in switch gear room, is characterized in that, comprising:
Pedestal, for providing support;
Vertical rod, is arranged on the upper end of described pedestal;
The arm of force, one end of the described arm of force and the top of described vertical rod are articulated and connected;
Hook, is connected with the other end of the described arm of force; With
Hydraulic pump, is arranged between described vertical rod and the described arm of force, for providing lifting force.
2. the special lifting service kit of handcart circuit breaker in switch gear room according to claim 1, is characterized in that, also comprise:
Multiple universal wheel, described universal wheel is arranged on the lower end of pedestal.
3. the special lifting service kit of handcart circuit breaker in the switch gear room according to claim, is characterized in that, also comprise:
Multiple brake, multiple described brake and multiple described universal wheel one_to_one corresponding are arranged, for carrying out spacing to described universal wheel.
4. the special lifting service kit of handcart circuit breaker in switch gear room according to claim 1 and 2, it is characterized in that, described pedestal comprises:
Supporting base;
Support carriers, is articulated and connected with described supporting base; With
Limit shaft, for carrying out spacing to described support carriers when supporting.
5. the special lifting service kit of handcart circuit breaker in switch gear room according to claim 4, is characterized in that:
Described supporting base is provided with limiting stand, and the described support carriers for doubling poststack is carried out spacing.
6. the special lifting service kit of handcart circuit breaker in switch gear room according to claim 4, is characterized in that:
Described supporting base is frame structure, is made up of four arms, and the second arm is fixedly connected with the first arm with one end of the 3rd arm, and the second arm is connected with the 4th arm with the other end of the 3rd arm.
7. the special lifting service kit of handcart circuit breaker in switch gear room according to claim 6, is characterized in that:
Described second arm and the distance of described 3rd arm between described first arm are less than described second arm and the distance of described 3rd arm between described 4th arm.
8. the special lifting service kit of handcart circuit breaker in the switch gear room according to claim 6 or 7, it is characterized in that: described support carriers is two support bars, a described support bar and described second arm are articulated and connected, and support bar described in another root and described 3rd arm are articulated and connected.
9. the special lifting service kit of handcart circuit breaker in switch gear room according to claim 1 and 2, it is characterized in that, the described arm of force is the scalable arm of force.
10. the special lifting service kit of handcart circuit breaker in switch gear room according to claim 1 and 2, it is characterized in that, described hydraulic pump is hydraulic hand-pump.
CN201510660898.XA 2015-10-13 2015-10-13 The special lifting service kit of handcart circuit breaker in a kind of switch gear room CN105244788B (en)

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CN201510660898.XA CN105244788B (en) 2015-10-13 2015-10-13 The special lifting service kit of handcart circuit breaker in a kind of switch gear room

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Application Number Priority Date Filing Date Title
CN201510660898.XA CN105244788B (en) 2015-10-13 2015-10-13 The special lifting service kit of handcart circuit breaker in a kind of switch gear room

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CN105244788B CN105244788B (en) 2018-06-22

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105870822A (en) * 2016-06-13 2016-08-17 国网山东省电力公司莱阳市供电公司 Overhauling device for circuit breaker of centrally installed switchgear
CN106006438A (en) * 2016-07-28 2016-10-12 李文龙 Multifunctional hydraulic crane
CN106353661A (en) * 2016-09-28 2017-01-25 国网冀北电力有限公司物资分公司 Lifting device for checking and detecting inventory power equipment

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2291402Y (en) * 1997-04-11 1998-09-16 铜陵皖江机械总厂 Folding crane
CN201746253U (en) * 2010-07-02 2011-02-16 常熟通润汽车零部件股份有限公司 Folding engine crane
CN102674162A (en) * 2012-05-28 2012-09-19 山东电力集团公司潍坊供电公司 Special lifting device for pneumatic mechanism of circuit breaker
CN204474180U (en) * 2015-01-28 2015-07-15 广州市自来水公司 A kind of movable hydraulic lifting appliance
CN205016898U (en) * 2015-10-13 2016-02-03 国家电网公司 Maintenance instrument is lifted by crane in special use of handcart circuit breaker in switch gear room

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2291402Y (en) * 1997-04-11 1998-09-16 铜陵皖江机械总厂 Folding crane
CN201746253U (en) * 2010-07-02 2011-02-16 常熟通润汽车零部件股份有限公司 Folding engine crane
CN102674162A (en) * 2012-05-28 2012-09-19 山东电力集团公司潍坊供电公司 Special lifting device for pneumatic mechanism of circuit breaker
CN204474180U (en) * 2015-01-28 2015-07-15 广州市自来水公司 A kind of movable hydraulic lifting appliance
CN205016898U (en) * 2015-10-13 2016-02-03 国家电网公司 Maintenance instrument is lifted by crane in special use of handcart circuit breaker in switch gear room

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105870822A (en) * 2016-06-13 2016-08-17 国网山东省电力公司莱阳市供电公司 Overhauling device for circuit breaker of centrally installed switchgear
CN106006438A (en) * 2016-07-28 2016-10-12 李文龙 Multifunctional hydraulic crane
CN106006438B (en) * 2016-07-28 2019-09-17 李文龙 A kind of multifunction hydraulic crane
CN106353661A (en) * 2016-09-28 2017-01-25 国网冀北电力有限公司物资分公司 Lifting device for checking and detecting inventory power equipment

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