CN108190658A - Multi-thread synchronous and asynchronous paying out machine - Google Patents
Multi-thread synchronous and asynchronous paying out machine Download PDFInfo
- Publication number
- CN108190658A CN108190658A CN201711323368.1A CN201711323368A CN108190658A CN 108190658 A CN108190658 A CN 108190658A CN 201711323368 A CN201711323368 A CN 201711323368A CN 108190658 A CN108190658 A CN 108190658A
- Authority
- CN
- China
- Prior art keywords
- asynchronous
- paying out
- out machine
- hydraulic
- thread synchronous
- 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
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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
- 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
- B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
- B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
- B65H75/40—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material mobile or transportable
- B65H75/42—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material mobile or transportable attached to, or forming part of, mobile tools, machines or vehicles
- B65H75/425—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material mobile or transportable attached to, or forming part of, mobile tools, machines or vehicles attached to, or forming part of a vehicle, e.g. truck, trailer, vessel
-
- 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
- B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
- B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
- B65H75/44—Constructional details
- B65H75/4481—Arrangements or adaptations for driving the reel or the material
- B65H75/4484—Electronic arrangements or adaptations for controlling the winding or unwinding process, e.g. with sensors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
-
- 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
A kind of electric power installs maintained equipment, i.e., a kind of multi-thread synchronous and asynchronous paying out machine, including rope rolling（9）, it is characterised in that：The rope rolling（9）There are four, the board that can be walked mounted on one（1）Above, each rope rolling（9）Spool be respectively arranged with a set of hydraulic unit driver（10）, often cover hydraulic unit driver（10）It is equipped with high-pressure oil pipe（7）And oil return pipe（12）The hydraulic circuit formed, the high-pressure oil pipe of each hydraulic circuit（7）Pass through distributor（5）With hydraulic oil pump（4）It is connected, hydraulic oil pump（4）By engine（3）It drives.Advantage is：Manpower is substituted by hydraulic test and either synchronously or asynchronously broadcasts three tunnels or four road aerial condutors, the measurement device of a variety of running parameters and the control device of the various courses of work can be also added, realizes automation, intelligent operation, it is efficient, at low cost, installation and maintenance for overhead line provide suitable device.
Description
Technical field
The present invention relates to a kind of power circuit spanning equipment, i.e., a kind of multi-thread synchronous and asynchronous paying out machine.
Background technology
Overhead line will be installed between the shaft tower of power circuit, particularly in barriers such as line crossing river, highway, railways
When hindering, the overhead line of relatively long distance is needed.Past, overhead line manpower or animal power drawing are set up, and efficiency is very low, labor intensity
It is very high.In recent years, a variety of pay-off equipments are developed, critical piece is all a kind of rope rolling of Wheel-type, and long rope is pulled out,
Connecting wire, then by rotating wheel disk, conducting wire is won over.But above equipment is all single line operation, can only once draw one
Line.And transmission line of electricity generally has three or four lines, this equipment needs repeatedly drawing, and needs a large amount of manpower cooperation behaviour
Make, operating efficiency does not still adapt to the needs of electric power facility fast development.
Invention content
The object of the present invention is to provide one kind can install branched conducting wire simultaneously, and employment is few, especially with automatic
Change, intelligentized overhead line multichannel paying out machine.
Above-mentioned purpose is realized by following technical scheme：A kind of multi-thread synchronous and asynchronous paying out machine is developed, including rope rolling,
Feature is：The rope rolling has four, and above the board that can be walked mounted on one, the spool of each rope rolling is respectively arranged with a set of
Hydraulic unit driver often covers hydraulic unit driver and is equipped with the hydraulic circuit that high-pressure oil pipe and oil return pipe are formed, and each hydraulic pressure returns
The high-pressure oil pipe on road is connected by distributor with hydraulic oil pump, and high-pressure pump is driven by engine.
The engine is diesel engine or gasoline engine or motor.
The hydraulic unit driver is equipped with hydraulic torque display.
Rope length measuring appliance is housed before the rope rolling.
The rope length measuring appliance has the column of a setting, and upper end passes through one friction pulley of rotating shaft support, friction pulley and meter
Number device is connected, and column is inserted in sliding sleeve, and sliding sleeve lower end is fixed on board, and the tensioning spring being connect with sliding sleeve is sleeved on the outer of column
Face, tensioning spring upper end are supported on the lower section of friction pulley, and friction pulley backing pressure is in the downside of drawstring.
The board is equipped with drawstring flinger.
The drawstring flinger is similar to catapult, is equipped with seat board by hinge axis on board, pacifies in the plate face of seat board
Load connects two tension springs, and tension spring one end is connected by bow beam, and be connected twisted rope on rear side of bow beam, and seat board is equipped with bayonet lock and strand behind bow beam
Axis, twisted rope are wrapped on hinge shaft, and hinge shaft is equipped with tommy bar shape and twists handle, is equipped on slideway above seat board, equipped with transmitting bar on slideway.
The board is equipped with degree of speeding measuring appliance.
The paying out machine is equipped with control device.
The control device is equipped with data processor, and data processor has signal receiving port and instruction delivery outlet, and signal connects
It closes up and receives the signal of hydraulic pressure torque sensor, rope length sensor, degree of speeding sensor, instruction output end and pump switch and distribution
Device is associated.
The beneficial effects of the invention are as follows：Three tunnels are either synchronously or asynchronously broadcasted by hydraulic test replacement manpower or four tunnels are maked somebody a mere figurehead and led
Line can also add the measurement device of a variety of running parameters and the control device of the various courses of work, realize automation, intelligence
Operation, efficient, at low cost, installation and maintenance for overhead line provide suitable device.
Description of the drawings
Fig. 1 is the front view of the first embodiment；
Fig. 2 is the vertical view of the first embodiment；
Fig. 3 is the partial front elevation view of second of embodiment；
Fig. 4 is the partial front elevation view of the third embodiment；
Fig. 5 is the front view of the component rope length measuring appliance of the third embodiment；
Fig. 6 is the left view of the component rope length measuring appliance of the third embodiment；
Fig. 7 is the partial front elevation view of four kinds of embodiments；
Fig. 8 is the front view of the component drawstring flinger of the 4th kind of embodiment；
Fig. 9 is the partial front elevation view of the 5th kind of embodiment；
Figure 10 is the calculation schematic diagram of the 5th kind of embodiment；
Figure 11 is the structure diagram of the 6th kind of embodiment.
It is visible in figure：Board 1, traveling wheel 2, engine 3, hydraulic oil pump 4, distributor 5, seat 6, high-pressure oil pipe 7, individual event
Switch 8, rope rolling 9, hydraulic unit driver 10, drawstring 11, oil return pipe 12, fuel tank 13, hydraulic torque display 14, rope length measuring appliance
15, column 15-1, friction pulley 15-2, tensioning spring 15-3, sliding sleeve 15-4, counter 15-5, drawstring flinger 16, seat board 16-
1, bend beam 16-2, tension spring 16-3, hinge axis 16-4, emit bar 16-5, slideway 16-6, hanging hole 16-7, twisted rope 16-8, hinge shaft 16-
9, twist handle 16-10, bayonet lock 16-11, degree of speeding measuring appliance 17.
Specific embodiment
The first embodiment：As shown in Figure 1 and Figure 2, the multi-thread synchronous and asynchronous paying out machine of this one kind including rope rolling 9, but is rolled up
Rope machine 9 is not one, but four, above a board that can be walked 1, a baby tractor can also be mounted on
Wagon box on.Here spool one end of each rope rolling 9 is equipped with a set of hydraulic unit driver 10, and it is equal often to cover hydraulic unit driver 10
Equipped with the hydraulic circuit that high-pressure oil pipe 7 and oil return pipe 12 are formed, the high-pressure oil pipe 7 of each hydraulic circuit passes through distributor
5 are connected with hydraulic oil pump 4, and the oil return pipe 12 of each hydraulic circuit enters fuel tank 13, and fuel tank 13 is using oil pipe and hydraulic oil pump 4
Input end connect, hydraulic oil pump 4 is driven by engine 3.
Can be diesel engine or gasoline engine or motor etc. used herein of engine 3.
In order to easy to operate, seat 6 can be set, so that operating personnel use.
Here the form of distributor 5 can also there are many, what is enumerated in figure is a distributor.This distributor should
A variety of switches that each hydraulic unit driver works independently or works together and section hydraulic driver works at the same time are set.For letter
Change the structure of distributor, recommend the scheme using diagram, i.e., a set of list is housed on the high-pressure oil pipe 7 of each hydraulic unit driver 10
Item switch 8, the action with synthesis/distributor 5.
In use, the drawstring 11 being coiled on 9 spool of rope rolling is connected with conducting wire one end, hydraulic device is started, just
Conducting wire can be pulled, carries out air line working.And do not need to too many manpower cooperation, it is possible to while leading within installation four
Line.
Second of embodiment：On the basis of the first embodiment, hydraulic torque is equipped on each hydraulic unit driver 10
Display 13.During operation, the oil pressure and torque of the hydraulic unit driver 10 of each rope rolling 9 can be shown.In general, it is complete
Conducting wire tensile force into drawing is larger, and the pressure of hydraulic oil is higher, people can reference pressure data come judge conducting wire draw
Situation, in due course close completed towage individual event switch, until complete all conducting traction work.Certainly, also may be used
Can be that other reasons increase the pressure of the hydraulic unit driver, pressure data can also prompt operating personnel timely to find and locate
Various problems are managed, ensure the smooth implementation of entire engineering.
Fig. 3 illustrates a kind of simplest hydraulic torque display 13, i.e., in the enough transparent pipes of an intensity, if
Piston and compression spring are put, scale and number are printed on tube wall, nozzle is mounted on hydraulic unit driver, pipe orifice and hydraulic unit driver
Oil circuit communicate.In this manner it is possible to show the oil pressure and torque data in hydraulic unit driver.Certainly, hydraulic torque display
There are many 13 forms, and also there are many can use for commercial product, it is impossible to be only limitted to the product enumerated.
The third embodiment：As shown in figure 4, rope length is increased before rope rolling 9 on the basis of previous embodiment
Measuring appliance 15.Its effect is the length that can be pulled out with instant playback drawstring 11.
Obviously, it can show that drawstring 11 is pulled out there are many instruments of length, this example is only exemplified by one kind.As shown in Figure 5, Figure 6,
By one friction pulley 15-2 of rotating shaft support, friction pulley is connected with counter 15-5 for the column 15-1 upper ends of one setting.Column
It being inserted in sliding sleeve 15-4, sliding sleeve lower end is fixed on board, and the tensioning spring 15-3 being connect with sliding sleeve is sleeved on the outside of column,
Tight spring upper end is supported on the lower section of friction pulley.For friction pulley backing pressure at the downside of drawstring 11, the movement of drawstring 11, friction pulley is therewith
Rotation, you can the length for pulling out or retracting by the counter display drawstring 11 being connect with friction pulley.It can be with by pulling rope length
The traction situation of conducting wire is judged, so that operating personnel refer to.
4th kind of embodiment：As shown in fig. 7, on the basis of previous embodiment, drawstring flinger is equipped on board 1
16.Its effect is that drawstring is thrown away.Above highway, railway, river during the construction of line, drawing conducting wire is very inconvenient, such as
Fruit can throw drawstring to opposite, then socket conducting wire, then can get twice the result with half the effort.It is of course possible to there are many instrument for launching drawstring, this example
It is only exemplified by a kind of easy frame mode.With reference to Fig. 8 as it can be seen that this drawstring flinger 16 is similar to catapult, pass through on board
Hinge axis 16-4 is equipped with seat board 16-1, two tension spring 16-3 is installed in the plate face of seat board, the tension spring other end is with bending beam 16-2 phases
Even, be connected twisted rope 16-8 on rear side of bow beam 16-2, and seat board is equipped with bayonet lock 16-11 behind bow beam and hinge shaft 16-9, twisted rope are wrapped in
On hinge shaft, hinge shaft can be moved bow beam near hinge shaft to, and the hanging hole 16-7 on rear side of bow beam is hung over by twisting handle 16-10 rotations
On bayonet lock, while remove twisted rope.When needing transmitting, drawstring 11 is fixed on transmitting bar 16-5 front ends, transmitting bar 16-5 framves are in cunning
On road 16-6, rear end is supported on front side of bow beam, is adjusted the angle of seat board, is pulled out bayonet lock, bends beam preshoot under the pulling of tension spring,
Transmitting bar projects together together with drawstring 11.Certainly, tension spring mentioned here can be other elastomer materials, can also be by bow beam certainly
Body elasticity substitutes, it is impossible to be only limitted to the structure of diagram.
Larger in view of 11 mass of drawstring, transmitting range is insufficient, can as shown in the figure, using a lightweight cord, transmitting
Distance can be significantly increased.After transmitting is completed, cord rear end is connect again with drawstring, you can drawstring is moved to opposite.If
Overhead line starts one end to surface launching, can once be pulled through bifilar drawstring being connect in the middle part of cord and drawstring.It is of course also possible to
Once it is pulled through branched drawstring.
Further, it is possible to print length scale on cord or drawstring, the distance of point-to-point transmission can be grasped when moving opposite to,
Data are provided for construction.
5th kind of embodiment：As shown in figure 9, on the basis of previous embodiment, degree of speeding measuring appliance 17 is added on board.
Degree of speeding mentioned here is the tensioning degree of guide line, is the important indicator of conducting wire installation.At present, the instrument that degree of speeding measures has more
Kind, but be required in other position, i.e. the position perpendicular with conducting wire lead measures.The instrument that this example enumerates,
It may be mounted on board, the track stretched completely come analog conducting wire by measuring the difference in height of point-to-point transmission, then path line put down
The minimum point of conductive line bends is moved on to, and then judges the degree of speeding of conducting wire.
With reference to Figure 10 as it can be seen that this degree of speeding measuring appliance 17 can be elongated in height adjustable one installed above an of upright bar
Observation tube, the height of upright bar is adjusted first, on the basis of a certain point a points for having feature for reaching our shaft tower, then rotation observation
The angle of pipe is allowed to opposite with the respective point b of tested shaft tower, according to the parameter of shaft tower, obtains the difference in height of two opposite shaft towers,
It can the track that stretches of analog conducting wire.The height of column is reduced again to c, makes observation tube alignment conductive line bends point d, you can calculate
The degree of speeding of conducting wire.
In addition, the distance parameter measured by by the 4th kind of embodiment, originally the application method of degree of speeding measuring appliance 17 can be more
Add simplicity.
6th kind of embodiment：The paying out machine is equipped with control device.The control device can be automaton, most
It is well intelligent controlling device.Figure 11 illustrates a simple intelligent controlling device, as it can be seen that this device is equipped with data processing in figure
Device, data processor have signal receiving port and instruction delivery outlet, and signal receiving port receives hydraulic pressure torque sensor, rope length sensing
The signal of device, degree of speeding sensor, instruction output end are associated with pump switch and distributor.The parameter that can be more acquired,
Best operation scheme is calculated, substitutes most of labour of people.
Claims (10)
1. a kind of multi-thread synchronous and asynchronous paying out machine, including rope rolling（9）, it is characterised in that：The rope rolling（9）There are four, installation
In the board that one can walk（1）Above, each rope rolling（9）Spool be respectively arranged with a set of hydraulic unit driver（10）, often cover liquid
Press driver（10）It is equipped with high-pressure oil pipe（7）And oil return pipe（12）The hydraulic circuit formed, the height of each hydraulic circuit
Pressuring oil pipe（7）Pass through distributor（5）With hydraulic oil pump（4）It is connected, hydraulic oil pump（4）By engine（3）It drives.
2. multi-thread synchronous and asynchronous paying out machine according to claim 1, it is characterised in that：The engine（3）Be diesel engine or
Gasoline engine or motor.
3. multi-thread synchronous and asynchronous paying out machine according to claim 1, it is characterised in that：The hydraulic unit driver（10）Equipped with liquid
Press torque display（14）.
4. multi-thread synchronous and asynchronous paying out machine according to claim 1, it is characterised in that：The rope rolling（9）Before be equipped with
Rope length measuring appliance（15）.
5. multi-thread synchronous and asynchronous paying out machine according to claim 4, it is characterised in that：The rope length measuring appliance（15）There is one
The column of setting（15-1）, upper end passes through one friction pulley of rotating shaft support（15-2）, friction pulley and counter（15-5）It is connected, stands
Column is inserted in sliding sleeve（15-4）In, sliding sleeve lower end is fixed on board, the tensioning spring being connect with sliding sleeve（15-3）It is sleeved on column
Outside, tensioning spring upper end are supported on the lower section of friction pulley, and friction pulley backing pressure is in drawstring（11）Downside.
6. multi-thread synchronous and asynchronous paying out machine according to claim 1, it is characterised in that：The board（1）Drawstring is equipped with to throw
Emitter（16）.
7. multi-thread synchronous and asynchronous paying out machine according to claim 6, it is characterised in that：The drawstring flinger（16）With catapult
It is similar, pass through hinge axis on board（16-4）Seat board is installed（16-1）, two tension springs of installation connection in the plate face of seat board
（16-3）, tension spring one end is by bow beam（16-2）It is connected, bends beam（16-2）Rear side is connected twisted rope（16-8）, seat board bow beam behind set
There is bayonet lock（16-11）And hinge shaft（16-9）, twisted rope is wrapped on hinge shaft, and hinge shaft is equipped with tommy bar shape and twists handle（16-10）, above seat board
Equipped with slideway（16-6）On, equipped with transmitting bar on slideway（16-5）.
8. multi-thread synchronous and asynchronous paying out machine according to claim 1, it is characterised in that：The board（1）Degree of speeding is equipped with to survey
Measuring device（17）.
9. multi-thread synchronous and asynchronous paying out machine according to claim 1, it is characterised in that：The multi-thread synchronous and asynchronous paying out machine is equipped with
Control device.
10. multi-thread synchronous and asynchronous paying out machine according to claim 9, it is characterised in that：The control device is equipped at data
Device is managed, data processor has signal receiving port and instruction delivery outlet, and signal receiving port receives hydraulic pressure torque sensor, rope length sensing
The signal of device, degree of speeding sensor, instruction output end are associated with pump switch and distributor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711323368.1A CN108190658A (en) | 2017-12-13 | 2017-12-13 | Multi-thread synchronous and asynchronous paying out machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711323368.1A CN108190658A (en) | 2017-12-13 | 2017-12-13 | Multi-thread synchronous and asynchronous paying out machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108190658A true CN108190658A (en) | 2018-06-22 |
Family
ID=62574284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711323368.1A Pending CN108190658A (en) | 2017-12-13 | 2017-12-13 | Multi-thread synchronous and asynchronous paying out machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108190658A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109368418A (en) * | 2018-10-31 | 2019-02-22 | 东莞天速通信技术有限公司 | A kind of devices and methods therefor of adaptive folding and unfolding aircraft cable |
| CN109823927A (en) * | 2019-03-25 | 2019-05-31 | 真势兴技术股份有限公司 | Walking pay-off rack for construction of prestressed steel strand finished product bundle |
| CN114784706A (en) * | 2022-05-13 | 2022-07-22 | 李琦 | Multifunctional high-voltage line laying device for modular substation construction |
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|---|---|---|---|---|
| CN109368418A (en) * | 2018-10-31 | 2019-02-22 | 东莞天速通信技术有限公司 | A kind of devices and methods therefor of adaptive folding and unfolding aircraft cable |
| CN109823927A (en) * | 2019-03-25 | 2019-05-31 | 真势兴技术股份有限公司 | Walking pay-off rack for construction of prestressed steel strand finished product bundle |
| CN109823927B (en) * | 2019-03-25 | 2024-01-23 | 真势兴技术股份有限公司 | Walking pay-off rack for construction of prestressed steel strand finished product bundles |
| CN114784706A (en) * | 2022-05-13 | 2022-07-22 | 李琦 | Multifunctional high-voltage line laying device for modular substation construction |
| CN114784706B (en) * | 2022-05-13 | 2023-06-02 | 李琦 | Multifunctional high-voltage line laying device for modularized substation construction |
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