CN107193094A - A kind of duct optical cable the construction line-putting device - Google Patents

A kind of duct optical cable the construction line-putting device Download PDF

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Publication number
CN107193094A
CN107193094A CN201710550012.5A CN201710550012A CN107193094A CN 107193094 A CN107193094 A CN 107193094A CN 201710550012 A CN201710550012 A CN 201710550012A CN 107193094 A CN107193094 A CN 107193094A
Authority
CN
China
Prior art keywords
wheel
optical cable
deflecting
underground
crane boom
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
Application number
CN201710550012.5A
Other languages
Chinese (zh)
Inventor
郭俊国
高宪武
张传栋
周文
李广省
齐伟
李来发
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANDONG PACIFIC OPTICS FIBER AND CABLE Co Ltd
Original Assignee
SHANDONG PACIFIC OPTICS FIBER AND CABLE Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHANDONG PACIFIC OPTICS FIBER AND CABLE Co Ltd filed Critical SHANDONG PACIFIC OPTICS FIBER AND CABLE Co Ltd
Priority to CN201710550012.5A priority Critical patent/CN107193094A/en
Publication of CN107193094A publication Critical patent/CN107193094A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/46Processes or apparatus adapted for installing or repairing optical fibres or optical cables
    • G02B6/50Underground or underwater installation; Installation through tubing, conduits or ducts
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/46Processes or apparatus adapted for installing or repairing optical fibres or optical cables
    • G02B6/50Underground or underwater installation; Installation through tubing, conduits or ducts
    • G02B6/508Fixation devices in ducts for drawing cables

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)

Abstract

A kind of duct optical cable the construction line-putting device, pipeline includes the pipeline of vertical well head and level, including deflecting wheel on wire coil for optical cable, crane boom, dancing wheel, well and underground deflecting wheel, wire coil for optical cable is installed on the crane boom, optical cable one end on wire coil for optical cable is wrapped in after crane boom on dancing wheel, enter deflecting wheel deflecting on well after dancing wheel, extend down into the underground deflecting wheel deflecting of underground.Optical cable is entered in down-hole pipe, realization is laid, and reduces the labor intensity of people in work progress, improves fiber cable laying efficiency by the automatic unwrapping wire of crane boom through being oriented to clip wheel, dancing wheel and deflecting wheel.By the deflecting of deflecting wheel on well and underground deflecting wheel, optical cable is smoothly introduced in pipeline, it is to avoid optical cable weares and teares in vertical well head and pipeline angle position when laying.

Description

A kind of duct optical cable the construction line-putting device
Technical field
The present invention relates to optical fibre cable in duct cable laying operation technical field, more particularly to a kind of duct optical cable the construction line-putting dress Put.
Background technology
With the development of modern information technologies, the popularization of optic communication, fiber cable laying project scale is huge.Current down-hole pipe During fiber cable laying, without more suitable paying-off implement, still pulled with brute-force based on, this not only waste of manpower, also because drawing Fray optical cable during dragging, especially the angle position in pipeline well head.Optic communication performance and used life is influenceed, while this take The form of construction work of power is even more influence construction speed.
The content of the invention
To overcome problems of the prior art, the invention provides a kind of duct optical cable the construction line-putting device.Lifting Down-hole pipe fiber cable laying quality, has reduced or remitted the unnecessary damage caused in laid processes to optical cable, has used manpower and material resources sparingly.
The technical scheme adopted by the invention to solve the technical problem is that:This kind of duct optical cable the construction line-putting device, pipeline Include deflecting wheel and underground deflecting wheel on the pipeline of vertical well head and level, including wire coil for optical cable, crane boom, dancing wheel, well, The optical cable one end being provided with the crane boom on wire coil for optical cable, wire coil for optical cable is wrapped in after crane boom on dancing wheel, warp Enter deflecting wheel deflecting on well after dancing wheel, extend down into the underground deflecting wheel deflecting of underground.
Further, the wire coil for optical cable can unwrapping wire automatically, wire coil for optical cable is arranged on crane boom by rotating shaft, rotating shaft one End is connected by unwrapping wire motor with speed changer, and the other end is connected with hand propeller.
Further, the crane boom bottom is arranged on base, and crane boom top is provided with bridge motor, in crane boom Top is provided with deflecting axle, and deflecting axle may be rotatably mounted at the top of crane boom, and the optical cable on wire coil for optical cable passes through deflecting axle deflecting.
Further, the base bottom is provided with support base and the roller that can be locked, and base is placed by support base and roller On ground more than vertical well head.
Further, in addition to deflecting wheel support and enter mine timbering, the top of the deflecting wheel support and enter mine timbering Top is articulated and connected, and deflecting wheel is hingedly connected at the top of deflecting wheel support on well;It is described enter mine timbering middle part be hinged with base It is rotatably connected, underground deflecting wheel is fixedly mounted on the lower end into mine timbering.
Further, it is described enter mine timbering be telescoping shoring column, the bottom for entering mine timbering is provided with mounting-fixing base, installs solid Reservation is bolted on the borehole wall in well.
Further, it is described enter mine timbering mounting-fixing base be arranged on more than the pipeline of vertical well head and level has a common boundary Position, underground deflecting wheel is located at the following position in pipeline boundary of vertical well head and level.
Further, the anticreep wheel for being also rotatablely equipped with and acting on underground deflecting wheel, the anticreep wheel peace are entered on mine timbering Have below underground deflecting wheel and between the outer circumference surface of anticreep wheel and the outer circumference surface of underground deflecting wheel and be available for what optical cable passed through Space.
Further, guiding clip wheel and metering measuring instrument are additionally provided between crane boom and dancing wheel, being oriented to clip wheel includes two The position-limited wheel being vertically arranged and a horizontally disposed position-limited wheel, horizontally disposed position-limited wheel be arranged on two be vertically arranged it is spacing Between wheel, spacing space of the optical cable through the position-limited wheel that two are vertically arranged, metering measuring instrument is fixedly mounted with being oriented to clip wheel On limiting plate, and metering measuring instrument is arranged on the position that optical cable passed or penetrated spacing space.
Further, the dancing wheel is vapour-pressure type movable fixture, including upper wheel, lower whorl and flexible with cylinder Bar, optical cable is respectively wound around on wheel and lower whorl, and cylinder is fixedly mounted on wheel, the piston rod of cylinder and the top of expansion link It is fixedly connected, the bottom of expansion link is fixedly connected with lower whorl, moving up and down for expansion link can drive lower whorl to move up and down action, under The laying tension and payingoff speed that move up and down controllable upper wheel and the optical cable on lower whorl of wheel.
To sum up, above-mentioned technical proposal of the invention has the beneficial effect that:
The invention provides a kind of duct optical cable the construction line-putting device, optical cable is by the automatic unwrapping wire of crane boom, through guide clip Wheel, dancing wheel and deflecting wheel enter in down-hole pipe, and realization is laid, and is reduced the labor intensity of people in work progress, is improved Fiber cable laying efficiency.
The invention provides the tension force control that a kind of duct optical cable the construction line-putting device, optical cable pass through automatic unwrapping wire and dancing wheel System, can implement adjustment dancing wheel to the tension force of optical cable according to the pulling force under pipeline during fiber cable laying, both serve Clamping is prevented during fiber cable laying to realize again laborsaving during fiber cable laying.
The invention provides a kind of duct optical cable the construction line-putting device, optical cable is introduced in down-hole pipe by being oriented to clip wheel, Position-limiting action of the optical cable on well in course of conveying by deflecting guide wheel, prevents optical cable from rocking, has reduced or remitted when laying because unnecessary The performance of effect of attrition optical cable.
The invention provides a kind of duct optical cable the construction line-putting device, pass through the change of deflecting wheel on well and underground deflecting wheel To optical cable is smoothly introduced in pipeline, it is to avoid optical cable weares and teares in vertical well head and pipeline angle position when laying.
The invention provides a kind of duct optical cable the construction line-putting device, roller is housed in base, is movable fixture, carry It is easy to use.
Brief description of the drawings
Fig. 1 is overall structure diagram of the invention;
Fig. 2 is the structural representation of crane boom of the present invention;
Fig. 3 enters schematic view of the mounting position of the mine timbering in the pipeline of vertical well head and level for the present invention;
Fig. 4 enters the structural representation of mine timbering for the present invention;
Fig. 5 is the structural representation of dancing wheel of the present invention;
Fig. 6 be in Fig. 1 of the present invention guiding clip wheel A to structural representation.
In figure:
(1) the vertical well head in base, (2) wire coil for optical cable, (3), the pipeline of (4) level, (5) crane boom, (5-1) deflecting Axle, (5-2) bridge motor, (5-3) unwrapping wire motor, (5-4) speed changer, (5-5) limit that advance and retreat device, (6-1) are vertically arranged manually Position wheel, (6-2) horizontally disposed position-limited wheel, (7) metering measuring instrument, deflecting wheel on (8) well, (9) roller, (10) support base, (11) dancing wheel, the expansion link of wheel, (11-2) lower whorl, (11-3) with cylinder, (12) are entered mine timbering, (12-1) and entered on (11-1) Mine timbering expansion link, (12-2) underground deflecting wheel, (12-3) anticreep wheel, (13) deflecting wheel support, (14) fixed seat, (15) light Cable.
Embodiment
The feature and principle of the present invention are described in detail below in conjunction with accompanying drawing 1-6, illustrated embodiment is only used for explaining The present invention, not limits protection scope of the present invention with this.
As shown in figure 1, the invention pipeline includes the pipeline 4 of vertical well head 3 and level, including wire coil for optical cable 2, crane boom 5th, dancing wheel 11, deflecting wheel 8 and underground deflecting wheel 12-2 on well.It is provided with crane boom on wire coil for optical cable 2, wire coil for optical cable 2 The one end of optical cable 15 is wrapped in after crane boom 5 on dancing wheel 11, the deflecting of deflecting wheel 8 on well is entered after dancing wheel 11, downwards Extend into the underground deflecting wheel 12-2 deflectings of underground.
As shown in Fig. 2 wire coil for optical cable can unwrapping wire automatically, wire coil for optical cable is arranged on crane boom by rotating shaft, rotating shaft one end It is connected by unwrapping wire motor 5-3 with speed changer 5-4, the other end is connected with hand propeller 5-5.Optical cable 15 is automatic by crane boom Unwrapping wire, enters in down-hole pipe, realization is laid, and reduces the labor of people in work progress through being oriented to clip wheel, dancing wheel and deflecting wheel Fatigue resistance, improves fiber cable laying efficiency.
Crane boom bottom is arranged on base 1, and crane boom top is provided with bridge motor 5-2, is provided with the top of crane boom Deflecting axle 5-1, deflecting axle 5-1 may be rotatably mounted at the top of crane boom, and the optical cable on wire coil for optical cable passes through deflecting axle deflecting.By putting Line motor and speed changer provide power, wire coil for optical cable are driven by flap and pin, to realize automatic unwrapping wire.
Base bottom is placed on vertically provided with support base 10 and the roller 9 that can be locked, base 1 by support base 10 and roller 9 Well head more than ground on.In use, base is moved to correct position by roller, by using 4 support seat supports Ground, bears the gravity during use, and reach stopping effect.
Also include deflecting wheel support 13 and enter mine timbering 12, the top of deflecting wheel support 13 and the top hinge for entering mine timbering 12 Connect in succession, deflecting wheel is hingedly connected at the top of deflecting wheel support on well.Deflecting wheel support, is three-dimensional tapered support, relatively more steady Gu.The middle part for entering mine timbering is hinged with base and is rotatably connected, and changes at any time into mine timbering and bottom according to the need for inlet wire direction Seat be hinged incline direction, underground deflecting wheel is fixedly mounted on the lower end into mine timbering.
As shown in Figure 3 and Figure 4, mine timbering is entered for telescoping shoring column, including at least two are entered mine timbering expansion link 12-1, are entered The specific stretch mode of mine timbering expansion link 12 can be that both are set with, and by both collapsing lengths of bolt limitation, can also lead to Cross other modes and carry out extension and contraction control.The bottom for entering mine timbering is provided with mounting-fixing base 14, and fixed seat 14 is bolted on On the borehole wall in well.Fixed seat is that deep-well is fixed into mine timbering for convenience.It is movable detachable apparatus to enter mine timbering, enters well branch Frame expansion link can adjust length according to the depth of well, and screw is convenient fixed and easy to disassemble.
As shown in figure 3, the mounting-fixing base for entering mine timbering is arranged on vertical well head and the pipeline of level has a common boundary with upper Put, deflecting wheel in underground is located at the following position in pipeline boundary of vertical well head and level.Pass through deflecting wheel on well and underground deflecting The deflecting of wheel, optical cable is smoothly introduced in pipeline, it is to avoid optical cable occurs in vertical well head and pipeline angle position when laying Abrasion.
Enter on mine timbering the anticreep wheel 12-3 for being also rotatablely equipped with and acting on underground deflecting wheel, anticreep wheel 12-3 is arranged on well Below lower deflecting wheel and there is the space for being available for optical cable to pass through between the outer circumference surface of anticreep wheel and the outer circumference surface of underground deflecting wheel, very The good de- wheel phenomenon avoided in laid processes.
Guiding clip wheel and metering measuring instrument 7 are additionally provided between crane boom and dancing wheel, metering and laying tension can be by data Accurate display.As shown in fig. 6, being oriented to clip wheel includes the two position-limited wheel 6-1 and a horizontally disposed position-limited wheel being vertically arranged 6-2, horizontally disposed position-limited wheel is arranged between two position-limited wheels being vertically arranged, optical cable through two position-limited wheels being vertically arranged it Between spacing space, metering measuring instrument is fixedly mounted on limiting plate with being oriented to clip wheel, and metering measuring instrument is arranged on optical cable and worn Go out or penetrate the position in spacing space.
As shown in figure 5, dancing wheel is vapour-pressure type movable fixture, including upper wheel 11-1, lower whorl 11-2 and with cylinder Expansion link 11-3, optical cable is respectively wound around on wheel and lower whorl, and cylinder is fixedly mounted on wheel, and the piston rod of cylinder is with stretching The top of bar is fixedly connected, and the bottom of expansion link is fixedly connected with lower whorl, and the moving up and down to drive on lower whorl of expansion link moves down Action, the laying tension and payingoff speed that move up and down controllable upper wheel and the optical cable on lower whorl of lower whorl.Optical cable passes through certainly The tension force of dynamic unwrapping wire and dancing wheel, can implement adjustment dancing wheel to light according to the pulling force under pipeline during fiber cable laying The tension force of cable, had not only been served laborsaving when preventing during fiber cable laying clamping but also realizing fiber cable laying.
In use, wire coil for optical cable is caught up with base relevant position, with hand rotation manual propeller, install and wire coil clamping, Bridge motor switch is opened, drum is left base.Then, with hand light lead cable outer end, redirected axle, be oriented to clip wheel, dancing wheel, Deflecting wheel and underground deflecting wheel on well, optical cable is introduced in down-hole pipe, proceeds by and lays.
Above-described embodiment is only the description carried out to the preferred embodiment of the present invention, and not the scope of the present invention is entered Row limit, on the premise of design spirit of the present invention is not departed from, relevant technical staff in the field to the present invention various modifications and Improve, all should expand determined by claims of the present invention in protection domain.

Claims (10)

1. a kind of duct optical cable the construction line-putting device, pipeline includes the pipeline of vertical well head and level, it is characterised in that including Wire coil for optical cable, optical cable are installed on wire coil for optical cable, crane boom, dancing wheel, deflecting wheel and underground deflecting wheel on well, the crane boom Optical cable one end on drum is wrapped in after crane boom on dancing wheel, deflecting wheel deflecting on well is entered after dancing wheel, downwards Extend into the underground deflecting wheel deflecting of underground.
2. a kind of duct optical cable the construction line-putting device according to claim 1, it is characterised in that the wire coil for optical cable can be certainly Dynamic unwrapping wire, wire coil for optical cable is arranged on crane boom by rotating shaft, and rotating shaft one end is connected by unwrapping wire motor with speed changer, the other end It is connected with hand propeller.
3. a kind of duct optical cable the construction line-putting device according to claim 1, it is characterised in that the crane boom bottom peace On base, crane boom top is provided with bridge motor, and deflecting axle is provided with the top of crane boom, and deflecting axle may be rotatably mounted at At the top of crane boom, the optical cable on wire coil for optical cable passes through deflecting axle deflecting.
4. a kind of duct optical cable the construction line-putting device according to claim 3, it is characterised in that the base bottom is provided with Support base and the roller that can be locked, base are placed on by support base and roller on ground more than vertical well head.
5. a kind of duct optical cable the construction line-putting device according to claim 3 or 4, it is characterised in that also including deflecting wheel Support and enter mine timbering, the top of the deflecting wheel support is articulated and connected with entering at the top of mine timbering, and deflecting wheel is hinged company on well It is connected at the top of deflecting wheel support;It is described enter mine timbering middle part be hinged and be rotatably connected with base, deflecting wheel in underground is fixedly mounted In the lower end for entering mine timbering.
6. a kind of duct optical cable the construction line-putting device according to claim 5, it is characterised in that it is described enter mine timbering for can Telescope support, the bottom for entering mine timbering is provided with mounting-fixing base, and mounting-fixing base is bolted on the borehole wall in well.
7. a kind of duct optical cable the construction line-putting device according to claim 6, it is characterised in that it is described enter mine timbering peace Dress fixed seat is arranged on the pipeline boundary above position of vertical well head and level, and deflecting wheel in underground is located at vertical well head and water The flat following position in pipeline boundary.
8. a kind of duct optical cable the construction line-putting device according to claim 5, it is characterised in that enter on mine timbering and also rotate The anticreep wheel acted on underground deflecting wheel is installed, the anticreep wheel is arranged on the excircle of underground deflecting wheel lower section and anticreep wheel There is the space for being available for optical cable to pass through between the outer circumference surface of face and underground deflecting wheel.
9. a kind of duct optical cable the construction line-putting device according to claim 1, it is characterised in that between crane boom and dancing wheel Guiding clip wheel and metering measuring instrument are additionally provided with, being oriented to clip wheel includes two position-limited wheels and a horizontally disposed limit being vertically arranged Position wheel, horizontally disposed position-limited wheel is arranged between two position-limited wheels being vertically arranged, and optical cable passes through two position-limited wheels being vertically arranged Between spacing space, metering measuring instrument is fixedly mounted on limiting plate with being oriented to clip wheel, and metering measuring instrument is arranged on optical cable Pass or penetrate the position in spacing space.
10. a kind of duct optical cable the construction line-putting device according to claim 1, it is characterised in that the dancing wheel is gas Pressure type movable fixture, including upper wheel, lower whorl and the expansion link with cylinder, optical cable are respectively wound around on wheel and lower whorl, gas Cylinder is fixedly mounted on wheel, and the piston rod of cylinder is fixedly connected with the top of expansion link, and bottom and the lower whorl of expansion link are fixed Connection, moving up and down for expansion link can drive lower whorl to move up and down action, and moving up and down for lower whorl can control on upper wheel and lower whorl Optical cable laying tension and payingoff speed.
CN201710550012.5A 2017-07-07 2017-07-07 A kind of duct optical cable the construction line-putting device Pending CN107193094A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710550012.5A CN107193094A (en) 2017-07-07 2017-07-07 A kind of duct optical cable the construction line-putting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710550012.5A CN107193094A (en) 2017-07-07 2017-07-07 A kind of duct optical cable the construction line-putting device

Publications (1)

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CN107193094A true CN107193094A (en) 2017-09-22

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108773762A (en) * 2018-09-11 2018-11-09 杨光 A kind of geothermal well puts well pump auxiliary device
CN109592502A (en) * 2018-11-01 2019-04-09 上海市基础工程集团有限公司 Sea cable is deposited buried to set automatic tension control apparatus
CN111332860A (en) * 2020-03-13 2020-06-26 国网山东省电力公司桓台县供电公司 Power cable pay-off
CN111552047A (en) * 2020-06-15 2020-08-18 新三科技有限公司 Wall pipeline optical cable laying method
CN112859272A (en) * 2021-01-12 2021-05-28 江苏荣正通信科技有限公司 Pipeline optical cable paying-off power assisting device

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CH649657A5 (en) * 1980-11-11 1985-05-31 Rutschmann Ag Cable laying device
JP2000261925A (en) * 1999-03-09 2000-09-22 Shinwa:Kk Device for pull-out cable laid in conduit
CN101359815A (en) * 2008-10-07 2009-02-04 北京送变电公司 Scooter for tension stringing
CN201191731Y (en) * 2008-05-08 2009-02-04 宁波东方电力机具制造有限公司 Electric tackle
CN201541088U (en) * 2009-09-23 2010-08-04 中国电信股份有限公司泉州分公司 Portable cable laying auxiliary device
CN103588035A (en) * 2013-11-15 2014-02-19 天津长飞鑫茂光缆有限公司 Optical fiber pay-off device
CN104795765A (en) * 2015-05-09 2015-07-22 国网山东省电力公司潍坊供电公司 Cable laying and displacing frame
CN204515210U (en) * 2015-04-17 2015-07-29 赵圣杰 Intelligent optical cable laying construction car
CN204607270U (en) * 2015-05-22 2015-09-02 洛阳大元电缆有限公司 A kind of tension adjustable wire releasing device for extruding machine
CN105197686A (en) * 2015-08-31 2015-12-30 中天科技光纤有限公司 Novel multigroup re-winding device and control method thereof
CN105790165A (en) * 2016-05-04 2016-07-20 河北建筑工程学院 Wellhead cable dragging vehicle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH649657A5 (en) * 1980-11-11 1985-05-31 Rutschmann Ag Cable laying device
JP2000261925A (en) * 1999-03-09 2000-09-22 Shinwa:Kk Device for pull-out cable laid in conduit
CN201191731Y (en) * 2008-05-08 2009-02-04 宁波东方电力机具制造有限公司 Electric tackle
CN101359815A (en) * 2008-10-07 2009-02-04 北京送变电公司 Scooter for tension stringing
CN201541088U (en) * 2009-09-23 2010-08-04 中国电信股份有限公司泉州分公司 Portable cable laying auxiliary device
CN103588035A (en) * 2013-11-15 2014-02-19 天津长飞鑫茂光缆有限公司 Optical fiber pay-off device
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CN204607270U (en) * 2015-05-22 2015-09-02 洛阳大元电缆有限公司 A kind of tension adjustable wire releasing device for extruding machine
CN105197686A (en) * 2015-08-31 2015-12-30 中天科技光纤有限公司 Novel multigroup re-winding device and control method thereof
CN105790165A (en) * 2016-05-04 2016-07-20 河北建筑工程学院 Wellhead cable dragging vehicle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108773762A (en) * 2018-09-11 2018-11-09 杨光 A kind of geothermal well puts well pump auxiliary device
CN109592502A (en) * 2018-11-01 2019-04-09 上海市基础工程集团有限公司 Sea cable is deposited buried to set automatic tension control apparatus
CN111332860A (en) * 2020-03-13 2020-06-26 国网山东省电力公司桓台县供电公司 Power cable pay-off
CN111552047A (en) * 2020-06-15 2020-08-18 新三科技有限公司 Wall pipeline optical cable laying method
CN112859272A (en) * 2021-01-12 2021-05-28 江苏荣正通信科技有限公司 Pipeline optical cable paying-off power assisting device

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Application publication date: 20170922

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