CN203911362U - Lifting mechanism for power transmission and transformation installation and maintenance - Google Patents
Lifting mechanism for power transmission and transformation installation and maintenance Download PDFInfo
- Publication number
- CN203911362U CN203911362U CN201420346134.4U CN201420346134U CN203911362U CN 203911362 U CN203911362 U CN 203911362U CN 201420346134 U CN201420346134 U CN 201420346134U CN 203911362 U CN203911362 U CN 203911362U
- Authority
- CN
- China
- Prior art keywords
- anchor ear
- hoisting mechanism
- wirerope
- power transmission
- support
- 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 - Fee Related
Links
Landscapes
- Electric Cable Installation (AREA)
Abstract
The utility model discloses a lifting mechanism for power transmission and transformation installation and maintenance, which comprises a support and a steel wire rope winding wheel arranged on the support and used for enabling a steel wire rope to be wound. One end of the steel wire rope is wound on the steel wire rope winding wheel and the other end passes across a link-type hoop arranged on a wire pole and serving as a lifting point, and the lower end is hung with a lifting object. Through arranging the transmission and lifting mechanism on the support, functions of hoisting, removing, rescuing, transmitting and lifting electrical equipment and fittings can be realized, and a safety coupler protection mechanism mainly acts when the entire device is in the condition of overload operation; a 24V DC motor is the power source of the entire device; safe transmission and lifting functions can be realized; and the working efficiency and the working quality can be improved.
Description
Technical field
The utility model belongs to electric power system installation and maintenance technical field, is specifically related to a kind of hoisting mechanism of installing, overhauling for power transmission and transformation.
Background technology
Along with the development of transmission line electric power network, residential electricity consumption and industrial and mining enterprises' electricity consumption have become the primary part of electricity needs, power equipment, defeated, join, the work requirements such as the large and medium-sized power equipment such as power transformation engineering and line maintenance, maintenance increases day by day, the reliability requirement of electric power system electric equipment is more and more higher.Power equipment, because the number of operations quantity of stopping sending a telegram in reply increases, likely causes power transmission engineering to be installed because of interruption duration long, and tired operation produces the negative effect of safety in production and personal injury.Therefore, in order to ensure installation, the construction quality of personnel's operation, operator scheme and the novel construction detection method of just necessary utilization science, guarantee personal safety and equipment reliability of operation, to can take in time to build supplementary measure when main force's device fails of operation of power networks and defect, thereby raising engineering time and equipment are in the fortune life-span.
In electric power transmission line construction, there is the length of pair new line apart from installation, have the installation of old circuit, used equipment is renovated, the manpower transport who usually runs in line level crossing construction and the special area of crossing over various barriers operates construction.Of a great variety because of the barrier that power circuit is crossed over, have various power circuits, connection, highway, railway, house etc., and crossover point complexity brings larger potential safety hazard to line level crossing construction, and job site earth anchor to bury work difficulty underground large.As the contingency occurring while constructing, may cause being had a power failure for a long time across power circuit, railway transportation is interrupted, and the serious personal hidden danger that even causes occurs.
Utility model content
The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, a kind of hoisting mechanism of installing, overhauling for power transmission and transformation is provided, this device can be converted to power capacity by mechanical energy effectively, and construction effect is specification relatively, has guaranteed running quality and has improved operating efficiency.
To achieve these goals, the technical scheme that the utility model adopts is: comprise support and be installed on the wheel of the wirerope-winding for lay winding wire ropes on support, one end of steel wire rope is wrapped on wirerope-winding wheel, the other end is walked around to be arranged on electric pole and as suspension centre and is obtained chain anchor ear, and lower end hangs and promotes object; The input of wirerope-winding wheel is connected with the output of gear box, on the input of gear box, be connected with the first safety coupling that disconnects power in when overload, on the input of the first safety coupling, connect as the motor in automatic power source or as the rotary handle in manual power source.
Described support comprises that top is for installing the platform of conveying and hoisting mechanism, and the bottom of platform is provided with four supporting legs of some joint connected structures, and the lower end of supporting leg is connected with active legs and feet; Wherein, between supporting leg, be also provided with between two lateral frame, on lateral frame, be provided with the hanging ring for hanging pulley or annex.
In described gear box, be provided with and prevent that wirerope-winding wheel from reversing, and make to promote object and can hover over the latch of any point in lift stroke.
One end of described chain anchor ear be fixed on win in succession as the link plate of suspension centre or bent angle upper, the other end be arranged on link plate or the bent angle anchor ear hook on winning in succession and be connected; On chain anchor ear, be arranged with rubber sleeve with the part of electric pole joint, rubber sleeve is rectangular configuration, and a pair of working face of its inwall is provided with wear-resisting spring liner plate; Workbench is also installed on electric pole, and workbench is fixed on electric pole by link plate and chain anchor ear, and on workbench, is provided with some links.
Compared with prior art, the utlity model has following beneficial effect:
The utility model, by conveying and hoisting mechanism are installed on support, is mainly born lifting and the dismounting of power equipment, gold utensil, sues and labours etc.; Wirerope-winding wheel for lay winding wire ropes is installed on support, one end of steel wire rope is wrapped on wirerope-winding wheel, the other end is walked around to be arranged on electric pole and as suspension centre and is obtained chain anchor ear, lower end hangs and promotes object, realized the function of carrying and promoting, safety coupling protection mechanism is mainly to shield in the time that operation overloads when single unit system; 24V direct current machine is the power source of single unit system.The effect one of the utility model hoisting mechanism is to replace the operation of power hoisting car to use function; The 2nd, can in special area, complete the functions such as unsettled hanging point, unsettled transmission, equipment moving; The 3rd, the effect of suing and labouring that can realize provides rescue and relief for disasters and emergencies, has realized the function of safe conveying and lifting, has improved operating efficiency and work quality.
Further, the utility model is also provided with the precession mechanism being connected with hoisting mechanism with conveying on support, meanwhile, be also provided with the multi-function chain type anchor ear of the work that matches with conveying and hoisting mechanism, multi-function chain type anchor ear is mainly on convenient pole, to install fixed support on suspension centre and bar to use.The utility model precession mechanism and conveying and hoisting mechanism and the chain anchor ear and the workbench that are arranged on electric pole form an organic whole, have realized the several functions of conveying, lifting and precession, have further improved operating efficiency and work quality.
Brief description of the drawings
Fig. 1 is overall structure schematic diagram of the present utility model;
Fig. 2 is the overall structure schematic diagram of the utility model support;
Fig. 3 is the end view of the utility model precession mechanism;
Fig. 4 is the vertical view of the utility model precession mechanism and conveying and hoisting mechanism;
Fig. 5 is the structural representation of the utility model earth anchor;
Fig. 6 is the structural representation of the utility model earth anchor bottom vane and through hole;
Fig. 7 is the structural representation of the utility model ground anchor pole;
Fig. 8 is the annexation schematic diagram of the utility model ground anchor pole and earth anchor;
Fig. 9 is the structural representation of the utility model Spiralism type earth anchor connecting ring;
Figure 10 is the structural representation that the utility model connects link plate;
Figure 11 is the annexation schematic diagram of the utility model chain anchor ear and link plate;
Figure 12 is the structural representation of the utility model anchor ear hook;
Figure 13 is the structural representation of the utility model rubber sleeve;
Figure 14 is the annexation schematic diagram that the utility model chain anchor ear and bent angle are won in succession;
Figure 15 is the structural representation of the utility model workbench;
Figure 16 is the front view of the utility model chain anchor ear;
Figure 17 is the vertical view of the utility model chain anchor ear.
Wherein, 1 is support; 2 is earth anchor; 3 is chain anchor ear; 4 is workbench; 5 for promoting object; 6 is platform; 7 is supporting leg; 8 is active legs and feet; 9 is lateral frame; 10 is hanging ring; 11 is worm gear; 12 is worm screw; 13 is bearing; 14 is the first safety coupling; 15 is wirerope-winding wheel; 16 is gear box; 17 is the second safety coupling; 18 is that gear is transmitted in the first connection; 19 is the first fork type shaft coupling; 20 is the second fork type shaft coupling; 21 is that gear is transmitted in the second connection; 22 is latch; 23 is vane; 24 is through hole; 25 is link; 26 for connecting link plate; 27 is hanging point bolt; 28 is connecting bolt; 29 is ground anchor pole; 30 is Spiralism type earth anchor connecting ring; 31 is full screw thread bolt; 32 is link plate; 33 win in succession for bent angle; 34 is anchor ear hook; 35 is rubber sleeve; 36 is wear-resisting spring liner plate.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in more detail:
Referring to Fig. 1, the utility model comprises precession mechanism, conveying and the hoisting mechanism being installed on support 1 and is all installed on chain anchor ear 3 and the workbench 4 on electric pole; Earth anchor 2 is installed on the output of precession mechanism; The power intake of precession mechanism and conveying and hoisting mechanism is all connected with motor or rotary handle; Precession mechanism is connected by the transmission gear that is connected separately with hoisting mechanism with conveying; On conveying and hoisting mechanism, be provided with the wirerope-winding wheel 15 for lay winding wire ropes, one end of steel wire rope is wrapped on wirerope-winding wheel 15, and the other end is walked around as suspension centre chain anchor ear 3, and lower end hangs and promotes object 5.One end of chain anchor ear 3 is fixed on as the link plate 32 of suspension centre or bent angle and wins in succession on 33, the other end be arranged on the anchor ear hook 34 that link plate 32 or bent angle win in succession on 33 and be connected; On chain anchor ear 3, be arranged with rubber sleeve 35 with the part of electric pole joint, rubber sleeve 35 is rectangular configuration, and a pair of working face of its inwall is provided with wear-resisting spring liner plate 36; Workbench 4 is fixed on electric pole by link plate 32 and chain anchor ear 3, and is provided with some links on workbench 4.
Earth anchor 2 is hollow structure, and on earth anchor 2, is provided with vane 23; The lower end of earth anchor 2 and the side of bottom offer respectively the through hole 24 communicating with internal cavity; The inside and outside screw thread that all offers on the top of earth anchor 2.The top of earth anchor 2 is connected with link 25, and link 25 is connected on the internal thread on earth anchor 2 tops, and the below of link 25 is provided with and connects link plate 26; Connect on link plate 26 and be provided with some connecting bolts 28 for connecting the hanging point bolt 27 of bottom line and matching with the earth anchor 2 set screw threads in top.The upper end of earth anchor 2 is also connected with the ground anchor pole 29 for increasing earth anchor 2 working depth; The inside and outside screw thread that all offers at anchor pole 29 two ends, ground, and ground anchor pole 29 is connected with earth anchor 2 by Spiralism type earth anchor connecting ring 30 or full screw thread bolt 31.
Support comprises that top is for installing the platform 6 of precession mechanism and conveying and hoisting mechanism, and the bottom of platform 6 is provided with four supporting legs 7 of some joint connected structures, and the lower end of supporting leg 7 is connected with active legs and feet 8; Wherein, between supporting leg 7, be also provided with between two lateral frame 9, on lateral frame 9, be provided with the hanging ring 10 for hanging pulley or annex.Precession mechanism comprises the worm gear 11 being installed on support 1, and the worm screw 12 that drives worm gear 11 to rotate of matching with worm gear 11; In worm gear 11, be provided with the bearing 13 for supporting worm gear 11, on worm gear 11, offer with earth anchor 2 on the six square tube holes that match of outer six sides; One end of worm screw 12 is connected with and on when overload disconnects the input of the second safety coupling 14, the second safety couplings 14 of power, connects as the motor in automatic power source or as the rotary handle in manual power source.Conveying and hoisting mechanism comprise wirerope-winding wheel 15, the input of wirerope-winding wheel 15 is connected with the output of gear box 16, on the input of gear box 16, be connected with and on when overload disconnects the input of the first safety coupling 17, the first safety couplings 17 of power, connect as the motor in automatic power source or as the rotary handle in manual power source.The end of worm screw 12 other end connecting rods is provided with on the connecting rod between the second connection transmission gear 18, the second connection transmission gears 18 and worm screw 12 and is provided with and makes second to be connected the second fork type shaft coupling 19 that transmission gear 18 connects or cut off power source; On connecting rod between gear box 16 outputs and the first safety coupling 17, be disposed with and gear box 16 be connected or disconnect the first fork type shaft coupling 20 of power source and be connected the first connection transmission gear 21 that transmits gear 18 normal engagements with second.In gear box 16, be provided with and prevent that wirerope-winding wheel 15 from reversing, and make to promote object and can hover over the latch 22 of any point in lift stroke.
Principle of the present utility model:
Referring to Fig. 1, the utility model is made up of support 1, earth anchor 2, precession mechanism, conveying and hoisting mechanism, direct current machine (24V), steel-ball type torque force limiting device (the second safety coupling 14 and the first safety coupling 17), rotary handle.Rotate when direct current machine (24V) drives the worm screw of precession mechanism, worm drive worm gear rotarily drives multi-functional earth anchor and rotates, and multi-functional earth anchor screws in automatic soil under the effect of self vane.While running into larger resistance as this device, the first shaft coupling 14 starts disconnection direct current machine (24V), and device quits work, and protective device is not damaged, and when direct current machine (24V) is changed into rotary handle, can realize earth anchor and manually screw in.In the time that worm screw is rotated, transmit gear train by connection and drive conveying and hoisting mechanism work simultaneously.In addition, when direct current machine (24V) is changed to activation point, change to and carry and hoisting mechanism input, transmit gear train by connection and also can realize precession mechanism and conveying and hoisting mechanism work, this operating state is by the fork type shaft coupling position of adjusting device, can realize two mechanisms and work simultaneously or work independently, also can realize and use manual operation.On conveying and hoisting mechanism input axle, be also provided with steel-ball type torque force limiting device (safety coupling), protect whole device.
For the career field of expanding unit, be also provided with workbench two mechanisms on multi-function chain type anchor ear and bar, convenient for laying suspension centre and safe operation platform on electric pole.Integrated model has good reliability, operability, stability, and range of application is very extensive.
As shown in Figure 2, single unit system is installed in the effect of the utility model platform 6, and supporting leg 7 entirety adopt three joint connected structures, laterally fixing with bolt, object is convenient in the work of special area employing height leg, can also obtain maximum support power (utilizing inclined-plane self-lock mechanism); Active legs and feet 8 can make support firm, are connected with supporting leg by screw thread; Support entirety is firm for lateral frame 9; Hanging ring 10 effects are to hang pulley and other annex.
As shown in Figure 3 and Figure 4, turbine 11 effects of the present utility model are power output, drive earth anchor 2 to rotate, and make earth anchor 2 screw in and screw out; Worm screw 12 effects are to drive turbine 11 to rotate; The second fork type shaft coupling 19 effects are the second connection transmission gear 18 is connected or cut off power source; Second connects transmission gear 18 is used for connecting conveying and hoisting mechanism; The second safety coupling 14 Main Functions disconnect power in the time that single unit system overloads, and protective device is not damaged; Bearing 13 effects are to support turbine 11; The effect of 24V motor is that single unit system is realized automatic power source, designs remote-controlled control; Rotary handle is the manual power source of single unit system.The second safety coupling 14 and the first safety coupling 17 are steel-ball type torque force limiting device.
As shown in Fig. 4 is, 16 effects of the utility model gear box are to make wirerope-winding wheel 15 obtain an applicable rotating speed; Latch 22 prevents that wirerope-winding wheel 15 from reversing, and can make object hover over any point; The first fork type shaft coupling 20 effects are gear box 16 is connected or cut off power source; The second safety coupling 17 Main Functions disconnect power in the time that single unit system overloads, and ensuring equipment is not damaged; The effect of 24V motor is that single unit system is realized automatic power source, designs remote-controlled control; Rotary handle is the manual power source of single unit system; 15 effects of wirerope-winding wheel are lay winding wire ropes.
As shown in Fig. 5 to Figure 10, the utility model earth anchor 2 is self-rotary earth anchor, self-rotary earth anchor is with vane 23 by self, in the time of stressed rotation, earth anchor 2 automatically screws under the effect of vane 23, earth anchor 2 itself is hollow, and lower end is provided with the through hole 24 communicating with it, facilitates liquid to flow out to earth anchor 2 to lubricate, earth anchor is provided with screw thread inside and outside 2 upper ends, for connecting other object; Ground anchor pole 29 is extension bars of earth anchor 2, can make earth anchor 2 reach desirable working depth, inside and outside two ends, be provided with screw thread, it can be connected with full screw thread bolt 31 with self-rotary earth anchor, after connection, fix with jackscrew, also can connect with Spiralism type earth anchor connecting ring 30, can make earth anchor 2 increase from spin, precession is more steady; Connect link plate 26 and be used for hanging earthing conductor design, can realize many ground wires and articulate simultaneously, the connecting bolt 28 in the middle of it and self-rotary earth anchor and on anchor pole 29 set screw thread mate; Link 25 is to connect it after earth anchor screws in, can colligation sling, hang pulley and use.
As shown in Figure 11 to Figure 17, the utility model chain anchor ear 3 is to coordinate conveying and hoisting mechanism design, for this mechanism expands working space, multi-function chain type anchor ear can link up with 34 with chain anchor ear, bent angle win in succession 33 connections use, bent angle is won in succession and 33 is provided with mount hole, also can be connected use with link plate 32, by rotating the nut tensioning chain of chain anchor ear hook, for laying suspension centre on electric pole, for protection electric pole multi-function chain type anchor ear is provided with abrasive rubber cover 35, abrasive rubber cover 35 is rectangular configuration, the a pair of working face of inwall is designed with wear-resisting spring liner plate and improves the persistence using, for further improving and carry and hoisting mechanism working range, also for it is provided with workbench 4 on bar, be fixed on bar with link plate 32 and multi-function chain type anchor ear, the workbench 4 on bar is provided with multiple links, the use of conveniently working.
The utility model also has the following advantages:
For power grid construction and equipment safety operation lay the foundation, guarantee transmission line reliability service stability, this device specification and solved staff's fail safe in special area, reasonably operability, running quality is ageing and science operation is professional.This instrument is in the time installing, overhaul, safeguard, speedily carry out rescue work and sue and labour work, time saving and energy saving, can obviously increase work efficiency, and use function ratio more in alleviating operating personnel's working strength.Can improve the reliability of operation of power networks and alleviate staff's labour intensity, improving safety in production extra earning economic benefit.A co-ordinative construction for the many integrations such as novel conveying, three-dimensional lifting, temporary earthing device and screwing-in device, the structure of the particularly multi-functional conveying such as a kind of novel electric power construction, installation, maintenance, safety first-aid, lifting, precession mechanism.
Above content is only explanation technological thought of the present utility model; can not limit protection range of the present utility model with this; every technological thought according to the utility model proposes, any change of doing on technical scheme basis, within all falling into the protection range of the utility model claims.
Claims (4)
1. a hoisting mechanism of installing, overhauling for power transmission and transformation, it is characterized in that: comprise support (1) and be installed on the wheel of the wirerope-winding for lay winding wire ropes (15) on support (1), one end of steel wire rope is wrapped on wirerope-winding wheel (15), the other end is walked around and is arranged on electric pole and as the chain anchor ear (3) of suspension centre, lower end hangs and promotes object (5); The input of wirerope-winding wheel (15) is connected with the output of gear box (16), on the input of gear box (16), be connected with the first safety coupling (17) that disconnects power in when overload, on the input of the first safety coupling (17), connect as the motor in automatic power source or as the rotary handle in manual power source.
2. the hoisting mechanism of installing, overhauling for power transmission and transformation according to claim 1, it is characterized in that: described support (1) comprises that top is for installing the platform (6) of conveying and hoisting mechanism, the bottom of platform (6) is provided with four supporting legs (7) of some joint connected structures, and the lower end of supporting leg (7) is connected with active legs and feet (8); Wherein, between supporting leg (7), be also provided with between two lateral frame (9), on lateral frame (9), be provided with the hanging ring (10) for hanging pulley or annex.
3. the hoisting mechanism of installing, overhauling for power transmission and transformation according to claim 1 and 2, it is characterized in that: in described gear box (16), be provided with and prevent that wirerope-winding wheel (15) from reversing, and make to promote object and can hover over the latch (22) of any point in lift stroke.
4. the hoisting mechanism of installing, overhauling for power transmission and transformation according to claim 1 and 2, it is characterized in that: one end of described chain anchor ear (3) be fixed on link plate (32) as suspension centre or bent angle win in succession (33) upper, the other end be arranged on anchor ear that link plate (32) or bent angle win in succession on (33) and link up with (34) and be connected; Chain anchor ear (3) part upper and electric pole joint is arranged with rubber sleeve (35), and rubber sleeve (35) is rectangular configuration, and a pair of working face of its inwall is provided with wear-resisting spring liner plate (36); Workbench (4) is also installed on electric pole, and workbench (4) is fixed on electric pole by link plate (32) and chain anchor ear (3), and is provided with some links on workbench (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420346134.4U CN203911362U (en) | 2014-06-25 | 2014-06-25 | Lifting mechanism for power transmission and transformation installation and maintenance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420346134.4U CN203911362U (en) | 2014-06-25 | 2014-06-25 | Lifting mechanism for power transmission and transformation installation and maintenance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203911362U true CN203911362U (en) | 2014-10-29 |
Family
ID=51785608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420346134.4U Expired - Fee Related CN203911362U (en) | 2014-06-25 | 2014-06-25 | Lifting mechanism for power transmission and transformation installation and maintenance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203911362U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104078886A (en) * | 2014-06-25 | 2014-10-01 | 国家电网公司 | Combination device for power transmission and transformation installing and maintaining |
| CN105552786A (en) * | 2016-02-25 | 2016-05-04 | 国家电网公司 | Power transmission line speed regulation rope ladder climbing device |
-
2014
- 2014-06-25 CN CN201420346134.4U patent/CN203911362U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104078886A (en) * | 2014-06-25 | 2014-10-01 | 国家电网公司 | Combination device for power transmission and transformation installing and maintaining |
| CN104078886B (en) * | 2014-06-25 | 2016-06-22 | 国家电网公司 | A kind of combination unit installed for power transmission and transformation, overhaul |
| CN105552786A (en) * | 2016-02-25 | 2016-05-04 | 国家电网公司 | Power transmission line speed regulation rope ladder climbing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2013060166A1 (en) | Method for on-site installation of vertical-axis wind generator | |
| CN203998708U (en) | A kind of simple and easy controller switching equipment lifting appliance | |
| CN201176373Y (en) | Hoisting device for pylon | |
| CN104074191B (en) | A kind of screwing-in device installed for power transmission and transformation, overhaul | |
| CN203911362U (en) | Lifting mechanism for power transmission and transformation installation and maintenance | |
| CN204046050U (en) | A kind of multi-function chain type anchor ear | |
| CN104037661B (en) | A kind of all direction multifunctional power transmission and transformation installation, repairing auxiliary device | |
| CN202508791U (en) | Novel tower section lead-in device | |
| CN203359893U (en) | Portable lift | |
| CN204343771U (en) | A kind of convenient line bar | |
| CN203904995U (en) | Automatically-rotating ground anchor for power transmission and transformation mounting and overhaul | |
| CN103311848A (en) | Lift for outdoor substation bus operation | |
| CN104078886B (en) | A kind of combination unit installed for power transmission and transformation, overhaul | |
| CN205676079U (en) | A kind of built-in lowering or hoisting gear for scratch board feces cleaning system | |
| CN204237458U (en) | The laborsaving lifting utensil of a kind of electrical equipment | |
| CN201590609U (en) | Frame specially used for overhauling high-voltage circuit breaker and isolating switch | |
| CN203119386U (en) | Concrete rod lightning conductor lifting device | |
| CN202749753U (en) | Bracket type motor-driven winch | |
| CN203795885U (en) | Tower-type large-height-building demolition machine | |
| CN204633221U (en) | A kind of rotating lifting gear of power transmission line overhead ground wire | |
| CN202414917U (en) | Vertical elevator with spare safety rope | |
| CN204150988U (en) | A kind of hand gear type on-pole switch lifting appliance | |
| CN104340899A (en) | Manual gear type column switch hoisting device and application thereof | |
| CN104370230B (en) | Stent-type motor-driven grinding mill | |
| CN104377598A (en) | Straightening device for double-insulator-suspended yoke plates on electric transmission line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |