CN110510449A - Bridge cable steel wire draw drum - Google Patents
Bridge cable steel wire draw drum Download PDFInfo
- Publication number
- CN110510449A CN110510449A CN201910758435.5A CN201910758435A CN110510449A CN 110510449 A CN110510449 A CN 110510449A CN 201910758435 A CN201910758435 A CN 201910758435A CN 110510449 A CN110510449 A CN 110510449A
- Authority
- CN
- China
- Prior art keywords
- steel wire
- tyre
- turntable
- inner tube
- tensioning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 36
- 239000010959 steel Substances 0.000 title claims abstract description 36
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 238000013016 damping Methods 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 239000011324 bead Substances 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 8
- 230000033228 biological regulation Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 24
- 239000000725 suspension Substances 0.000 description 13
- 238000010276 construction Methods 0.000 description 8
- 238000012407 engineering method Methods 0.000 description 3
- 241000606750 Actinobacillus Species 0.000 description 2
- 241000282326 Felis catus Species 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000002910 structure generation Methods 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H49/00—Unwinding or paying-out filamentary material; Supporting, storing or transporting packages from which filamentary material is to be withdrawn or paid-out
- B65H49/18—Methods or apparatus in which packages rotate
- B65H49/20—Package-supporting devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/02—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package
- B65H59/04—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package by devices acting on package or support
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/18—Constructional details
- B65H75/30—Arrangements to facilitate driving or braking
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
- B65H2515/30—Forces; Stresses
- B65H2515/31—Tensile forces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/35—Ropes, lines
Abstract
The present invention relates to a kind of bridge cable steel wire draw drums, including pedestal, the pedestal has been vertically arranged mandrel, rotary axle box is cased on the outside of the mandrel, the bottom end of the rotary axle box is connect with base rotation, the bottom outside of the rotary axle box is provided with turntable, it is provided with control turntable between the bottom surface and pedestal of the turntable and turns the braking mechanism stopped, the tensioning inner tube of a tyre is disposed with around rotary axle box in the front of the turntable, coiled steel wire is set on the tensioning inner tube of a tyre, makes steel wire reel be in tensioning state by being tensioned the inner tube of a tyre.Draw drum of the invention is adapted to frame silk unwrapping wire to be vertical, frame silk be tensioned the inner tube of a tyre be it is adjustable, Principles of Regulation are the flexibility using parallelogram, change the angle of the adjacent edge of parallelogram to change the height of parallelogram, to change tensioning inner tube of a tyre outer diameter, the tensioning that steel wire is coiled is realized.
Description
Technical field
The present invention relates to a kind of suspension bridge steel wire draw drums.Belong to suspension bridge technical field of engineering equipment.
Background technique
Currently, there are mainly two types of the methods that main rope of suspension bridge is set up: aerial spinning engineering method (AS method) and Prefabricated parallel steel wire
Strand engineering method (PPWS method).AS method is referred to using steel wire as traction unit, and more steel wires are compiled into a steel wire on cat road
Beam stock, then multi beam beam stock is bound into the method to form main push-towing rope；PPWS rule using strand as traction unit, then by strand bind at
For the method for main push-towing rope.Due to large-span suspension bridge main cable strand weight, height is required to pulling equipment, it is especially underdeveloped in traffic
When Construction of The Mountainous Region large-span suspension bridge, there is bigger transport difficult compared to AS method in PPWS method, so, it is outstanding for mountain area large span
The construction first choice AS method of cable bridge.
Main rope of suspension bridge uses and spins one of the main method of method (AS method) as main cable construction at present in external quilt in the air
It is widely used, but the domestic all Prefabricated parallel cable strand methods of suspension bridge main cable construction engineering method (PPWS method) at present, China mainland
It there is no the suspension bridge using method (AS method) construction that spins in the air.AS method is using steel wire as traction unit, by more steel on cat road
Silk is compiled into a steel tendon stock, then multi beam beam stock is bound the method to form main push-towing rope；PPWS rule using strand as traction unit,
Then strand binding is become to the method for main push-towing rope.Due to large-span suspension bridge main cable strand weight, required pulling equipment requires high, spy
It is not in the underdeveloped Construction of The Mountainous Region large-span suspension bridge of traffic, it is excessive caused that AS method can avoid the single strand weight of PPWS method
Problem is transported, the method that spins in the air (AS method) sets up tool for the main rope of suspension bridge of super-span suspension bridge and bridge location area transport difficult
There is unique advantage.
The steel wire weight weight of main rope of suspension bridge, length is long, can not be carried out at high speeds using existing actinobacillus device,
Once improving payingoff speed, steel wire unwrapping wire will be unstable, occurs at random and jumps silk phenomenon, and actinobacillus device also can be unstable
It is fixed, greatly reduce construction efficiency.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of bridge cable steel wire unwrapping wire for the above-mentioned prior art
Disk, can be realized high speed unwinding, and speed is and stable up to 300m/min, be not in that steel wire is at random and the problem of jump silk,
Substantially increase construction efficiency.
The present invention solves the above problems used technical solution are as follows: a kind of bridge cable steel wire draw drum, including bottom
Seat, the pedestal have been vertically arranged mandrel, rotary axle box, the bottom end of the rotary axle box and pedestal are cased on the outside of the mandrel
Rotation connection, is provided with turntable in the bottom outside of the rotary axle box, is provided with control between the bottom surface and pedestal of the turntable
Turntable processed turns the braking mechanism stopped, is disposed with the tensioning inner tube of a tyre around rotary axle box in the front of the turntable, coiled steel wire is arranged
On the tensioning inner tube of a tyre, the tensioning inner tube of a tyre is circumferentially divided into several stretching units, and the bottom of each stretching unit passes through level
The linear guide of arrangement is connect with turntable, so that the stretching unit of the tensioning inner tube of a tyre is radially contracted centered on mandrel or expands,
So that the steel wire reel being set on the tensioning inner tube of a tyre is in tensioning state.
Preferably, several connecting rods, the company are provided between each stretching unit and rotary axle box of the tensioning inner tube of a tyre
One end of bar and the inner wall of stretching unit are hinged, and the other end and the tire core retainer plate being set on rotary axle box are hinged, by opening
The contraction or expansion of the tensioning inner tube of a tyre are realized in the axial movement of tire core retainer plate.
Preferably, the top of the mandrel is provided with down pressure nut, down pressure nut is threadedly engaged with rotary axle box, described
The bottom of down pressure nut is fixedly connected with a tire core retainer plate, realizes that a tire core retainer plate moves down along mandrel by adjusting down pressure nut
It is dynamic.
Preferably, the braking mechanism includes the brake disc coaxially arranged with turntable, a pair of of brake arm and damping oil cylinder, institute
It states brake disc to be fixedly connected with turntable, mutually rotating hinge connects among a pair of of brake arm, and hinge joint is fixedly connected with pedestal, institute
A pair of of the brake arm one end stated is provided with the disk brake of effect and brake disc, and the damping oil cylinder is connected to the another of brake arm
The clamping and relieving of disk brake are realized in end under the action of damping oil cylinder
Preferably, the draw drum includes a silk pressing frame, and the silk pressing frame is pressed on coil of wire surface, coil of wire by gravity
It is placed between silk pressing frame and turntable.
Compared with the prior art, the advantages of the present invention are as follows:
1, draw drum of the invention be it is vertical be adapted to frame silk unwrapping wire, frame silk be tensioned the inner tube of a tyre be it is adjustable, Principles of Regulation are
Using the flexibility of parallelogram, change the angle of the adjacent edge of parallelogram to change the height of parallelogram, from
And change tensioning inner tube of a tyre outer diameter, to guarantee tyre bead horizontal movement in being tensioned, in each tensioning, mole lower part is equipped with guide rail, adjusts
It is tensioned inner tube of a tyre size dimension and uses multiple thread structure, can quickly adjust tensioning inner tube of a tyre size；Draw drum is underlying, brake disc,
Brake system is arranged in two plane of plate edge of braking, and brake system generates the backward pull for rewinding system steel wire, guarantees that tensioner produces
The stabilization of cast steel thread tension.
2, brake system of the invention uses hydraulic or pressure control, and mechanical structure uses axis check ring Circlip tongs
Operating principle design, adjusting hydraulic, air pressure pressure may be implemented brake, damping, disengaging movement.
3, wire pressing device is set on draw drum of the invention, when high speed unwinding guarantees that steel wire will not be at random.
4, draw drum payingoff speed of the invention is high, up to 300m/min.
Detailed description of the invention
Fig. 1 is the structural schematic diagram in the embodiment of the present invention.
Fig. 2 is the structural schematic diagram of sealing plate in the embodiment of the present invention.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
As shown in figures 1 and 2, the steel wire draw drum of the bridge cable in the present embodiment, including can be stably placed on ground
Pedestal 1, the mandrel 2 being vertically arranged is fixed in the center of the pedestal 1, the outside of the mandrel 2 is cased with rotation axis
Set 3 is rotatablely connected between the mandrel 2 and rotary axle box 3 by bearing, and the bottom end of the rotary axle box 3 passes through thrust force aligning
Roller bearing is connected with pedestal 1, to realize rotation of the rotary axle box 2 relative to pedestal 1 and mandrel 2, in the rotary axle box 3
Bottom outside is provided with turntable 4, is provided with braking mechanism 5 between the bottom surface and pedestal 1 of the turntable 4, by braking mechanism 5 come
Control turntable 4 turns to stop.
It is disposed with the tensioning inner tube of a tyre 6 around rotary axle box 2 in the front of the turntable 4, coiled steel wire is set in the tensioning inner tube of a tyre 6
On, the tensioning inner tube of a tyre 6 is circumferentially divided into four stretching units, and the bottom of each stretching unit passes through horizontally disposed straight line
Guide rail 7 is connect with turntable 4, so that the stretching unit of the tensioning inner tube of a tyre 6 is radially contracted centered on mandrel 2 or expands, so that set
The steel wire reel being located on the tensioning inner tube of a tyre 6 is in tensioning state.
Several connecting rods 8 are provided between each stretching unit and rotary axle box 3 of the tensioning inner tube of a tyre 6, the connecting rod 8
The inner wall of one end and stretching unit is hinged, and the other end and the tire core retainer plate 9 being set on rotary axle box 3 are hinged, in the core
The top of axis 2 is provided with down pressure nut 10, and down pressure nut 10 is threadedly engaged with rotary axle box 3, the bottom of the down pressure nut 10
It is fixedly connected with a tire core retainer plate 9, realizes the moving up and down along mandrel 2 of tire core retainer plate 9, Principles of Regulation by adjusting down pressure nut 10
To change the adjacent edge of parallelogram using the flexibility of parallelogram (stretching unit, connecting rod and tire core retainer plate are constituted)
Angle to changing the height of parallelogram, to change tensioning inner tube of a tyre outer diameter.
The braking mechanism 5 is used for when needing to stop setting-out work, and quickly the turntable of high-speed rotation stops
Come, including the brake disc 5.1 coaxially arranged with turntable 4, a pair of of brake arm 5.2 and damping oil cylinder 5.3, the brake disc 5.1 with
Turntable 4 is fixedly connected, and mutually rotating hinge connects among a pair of of brake arm 5.2, and hinge joint is fixedly connected with pedestal 1, described
A pair of of 5.2 one end of brake arm is provided with the disk brake 5.4 of effect Yu brake disc 5.1, and the damping oil cylinder 5.3 is connected to brake arm
5.2 other end realizes the clamping and relieving of disk brake 5.4 under the action of damping oil cylinder.Brake structure generation rewindes system
The backward pull of steel wire guarantees that tensioner generates the stabilization of steel wire tension；Using hydraulic or pressure control, mechanical structure uses axis
It is designed with the operating principle of check ring Circlip tongs, adjusting hydraulic, air pressure pressure may be implemented brake, damping, disengaging movement.
To prevent steel wire from generating violent bounce during unreeling at a high speed, so that being detached from draw drum, therefore a silk pressing frame is set
11, the silk pressing frame 11 is pressed on coil of wire surface by gravity, and coil of wire is then placed between silk pressing frame 11 and turntable 4.
In addition to the implementation, all to use equivalent transformation or equivalent replacement the invention also includes there is an other embodiments
The technical solution that mode is formed should all be fallen within the scope of the hereto appended claims.
Claims (5)
1. a kind of bridge cable steel wire draw drum, it is characterised in that: including pedestal, the pedestal has been vertically arranged mandrel, institute
It states and is cased with rotary axle box on the outside of mandrel, the bottom end of the rotary axle box is connect with base rotation, at the bottom of the rotary axle box
It is provided with turntable on the outside of portion, control turntable is provided between the bottom surface and pedestal of the turntable and turns the braking mechanism stopped, described
The front of turntable is disposed with the tensioning inner tube of a tyre around rotary axle box, and coiled steel wire is set on the tensioning inner tube of a tyre, tyre bead in the tensioning
Several stretching units circumferentially are divided into, the bottom of each stretching unit is connect with turntable by horizontally disposed linear guide, made
Must be tensioned the inner tube of a tyre stretching unit it is radially contracted centered on mandrel or expansion so that be set in tensioning the inner tube of a tyre on steel wire coil
Disk is in tensioning state.
2. a kind of bridge cable steel wire draw drum according to claim 1, it is characterised in that: in the tensioning inner tube of a tyre
Several connecting rods are provided between each stretching unit and rotary axle box, one end of the connecting rod and the inner wall of stretching unit are hinged,
The other end and the tire core retainer plate being set on rotary axle box are hinged, and the receipts of the tensioning inner tube of a tyre are realized by the axial movement of tire core retainer plate
Contracting or expansion.
3. a kind of bridge cable steel wire draw drum according to claim 2, it is characterised in that: on the top of the mandrel
It is provided with down pressure nut, down pressure nut is threadedly engaged with rotary axle box, the bottom of the down pressure nut and the fixed company of tire core retainer plate
It connects, realizes tire core retainer plate moving up and down along mandrel by adjusting down pressure nut.
4. a kind of bridge cable steel wire draw drum according to claim 1, it is characterised in that: the braking mechanism includes
Coaxially arranged brake disc, a pair of of brake arm and damping oil cylinder, the brake disc are fixedly connected with turntable with turntable, a pair of brake
Mutually rotating hinge connects among arm, and hinge joint is fixedly connected with pedestal, described a pair of of the brake arm one end be provided with effect and
The disk brake of brake disc, the damping oil cylinder are connected to the other end of brake arm, realize disk brake under the action of damping oil cylinder
Clamping and relieving.
5. a kind of bridge cable steel wire draw drum according to claim 1, it is characterised in that: including a silk pressing frame, institute
It states silk pressing frame 12 and is pressed on coil of wire surface by gravity, coil of wire is placed between silk pressing frame and turntable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910758435.5A CN110510449A (en) | 2019-08-16 | 2019-08-16 | Bridge cable steel wire draw drum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910758435.5A CN110510449A (en) | 2019-08-16 | 2019-08-16 | Bridge cable steel wire draw drum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110510449A true CN110510449A (en) | 2019-11-29 |
Family
ID=68625468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910758435.5A Pending CN110510449A (en) | 2019-08-16 | 2019-08-16 | Bridge cable steel wire draw drum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110510449A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112520455A (en) * | 2020-12-08 | 2021-03-19 | 吉林大学 | Lifting steel belt reel loading mechanism |
| CN113415671A (en) * | 2021-05-08 | 2021-09-21 | 国网山东省电力公司淄博供电公司 | Novel insulated conductor unwrapping wire ware |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2583027A1 (en) * | 1985-06-06 | 1986-12-12 | Vallourec | Rapid-loading unwinder for coils of metal wire |
| CN2866449Y (en) * | 2006-02-20 | 2007-02-07 | 高智 | Drill machine disc type braking device |
| CN201049853Y (en) * | 2007-06-15 | 2008-04-23 | 上海浦江缆索股份有限公司 | Unbinding device for coiled cable |
| CN201560392U (en) * | 2009-10-30 | 2010-08-25 | 上海浦江缆索股份有限公司 | Horizontal paying out device of suspension cable main cable strands |
| CN201560013U (en) * | 2009-10-30 | 2010-08-25 | 上海浦江缆索股份有限公司 | Device for looping steel wire rope |
| CN102701014A (en) * | 2012-06-14 | 2012-10-03 | 无锡平盛科技有限公司 | Pay-off damping device for pay-off machine |
| CN102877585A (en) * | 2011-07-13 | 2013-01-16 | 发特泽公开股份有限公司 | Device for fixing a tension element, in particular a pull rope |
| CN108946290A (en) * | 2017-05-23 | 2018-12-07 | 德阳云路科技有限公司 | Automatically adjust tension stringing disk |
| CN208747388U (en) * | 2018-09-11 | 2019-04-16 | 山东大山不锈钢制品有限公司 | A kind of adjustable radial tension mechanism |
| CN211110288U (en) * | 2019-08-16 | 2020-07-28 | 江苏法尔胜缆索有限公司 | Steel wire drawing drum for bridge cable |
-
2019
- 2019-08-16 CN CN201910758435.5A patent/CN110510449A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2583027A1 (en) * | 1985-06-06 | 1986-12-12 | Vallourec | Rapid-loading unwinder for coils of metal wire |
| CN2866449Y (en) * | 2006-02-20 | 2007-02-07 | 高智 | Drill machine disc type braking device |
| CN201049853Y (en) * | 2007-06-15 | 2008-04-23 | 上海浦江缆索股份有限公司 | Unbinding device for coiled cable |
| CN201560392U (en) * | 2009-10-30 | 2010-08-25 | 上海浦江缆索股份有限公司 | Horizontal paying out device of suspension cable main cable strands |
| CN201560013U (en) * | 2009-10-30 | 2010-08-25 | 上海浦江缆索股份有限公司 | Device for looping steel wire rope |
| CN102877585A (en) * | 2011-07-13 | 2013-01-16 | 发特泽公开股份有限公司 | Device for fixing a tension element, in particular a pull rope |
| CN102701014A (en) * | 2012-06-14 | 2012-10-03 | 无锡平盛科技有限公司 | Pay-off damping device for pay-off machine |
| CN108946290A (en) * | 2017-05-23 | 2018-12-07 | 德阳云路科技有限公司 | Automatically adjust tension stringing disk |
| CN208747388U (en) * | 2018-09-11 | 2019-04-16 | 山东大山不锈钢制品有限公司 | A kind of adjustable radial tension mechanism |
| CN211110288U (en) * | 2019-08-16 | 2020-07-28 | 江苏法尔胜缆索有限公司 | Steel wire drawing drum for bridge cable |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112520455A (en) * | 2020-12-08 | 2021-03-19 | 吉林大学 | Lifting steel belt reel loading mechanism |
| CN113415671A (en) * | 2021-05-08 | 2021-09-21 | 国网山东省电力公司淄博供电公司 | Novel insulated conductor unwrapping wire ware |
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