CN111675052A - Laying device for communication wire - Google Patents

Laying device for communication wire Download PDF

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Publication number
CN111675052A
CN111675052A CN202010394924.XA CN202010394924A CN111675052A CN 111675052 A CN111675052 A CN 111675052A CN 202010394924 A CN202010394924 A CN 202010394924A CN 111675052 A CN111675052 A CN 111675052A
Authority
CN
China
Prior art keywords
plate
bottom end
mounting
limiting
driving box
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
CN202010394924.XA
Other languages
Chinese (zh)
Inventor
孙梓超
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.)
Shenzhen Choseal Industrial Co ltd
Original Assignee
Shenzhen Choseal Industrial 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 Shenzhen Choseal Industrial Co ltd filed Critical Shenzhen Choseal Industrial Co ltd
Priority to CN202010394924.XA priority Critical patent/CN111675052A/en
Publication of CN111675052A publication Critical patent/CN111675052A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/34Cores, 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
    • B65H75/38Cores, 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
    • B65H75/44Constructional details
    • B65H75/4481Arrangements or adaptations for driving the reel or the material
    • B65H75/4486Electric motors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/34Cores, 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
    • B65H75/38Cores, 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
    • B65H75/40Cores, 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
    • B65H75/42Cores, 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
    • B65H75/425Cores, 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/34Cores, 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
    • B65H75/38Cores, 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
    • B65H75/44Constructional details
    • B65H75/4457Arrangements of the frame or housing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00Handled material; Storage means
    • B65H2701/30Handled filamentary material
    • B65H2701/34Handled filamentary material electric cords or electric power cables

Landscapes

  • Photovoltaic Devices (AREA)

Abstract

The invention discloses a laying device for communication wires, which comprises a mounting rack; a control panel is arranged on one side of the mounting rack; a connecting plate is arranged on the other side of the mounting rack; a fixed shaft is arranged at the bottom end of the connecting plate; the fixed shaft is connected with the geometric center of the wire connecting wheel through a coupler; the bottom end of the wire wheel is fixedly connected with the turntable; the rotary table is arranged on the mounting plate; a second driving box is arranged at the bottom end of the mounting plate corresponding to the rotary disc; the mounting frame is provided with an adjusting mechanism corresponding to the mounting plate; the bottom end of the connecting plate is provided with a protective device corresponding to the wire wheel; the bottom end of the mounting plate is fixedly connected with the base through a positioning column; and a pulling handle is arranged at the top of the base. The invention has convenient use and high working efficiency.

Description

Laying device for communication wire
Technical Field
The invention relates to the technical field of communication, in particular to a laying device for a communication wire.
Background
Along with the development of society, the continuous progress of science and technology, the information age has accelerated the speed of information transfer, the infrastructure of communication is more and more perfect, communication equipment's installation needs to use the electric wire to communicate, guarantee circuit information's transmission, laying of electric wire needs to use the electric wire wheel to stretch the electric wire, length according to needs confirms specific electric wire length, but current communication electric wire receive and releases laying device, generally manual rotation, need operating personnel to pull, and be not convenient for the loading and unloading of wire wheel, operating personnel's intensity of labour has been increased.
Therefore, in view of the above situation, there is a strong need for a communication wire laying device.
Disclosure of Invention
The present invention is directed to a laying device for communication wires, which solves the above problems of the related art.
In order to achieve the purpose, the invention provides the following technical scheme:
a laying device for communication wires comprises a mounting rack; a control panel is arranged on one side of the mounting rack; a connecting plate is arranged on the other side of the mounting rack; a fixed shaft is arranged at the bottom end of the connecting plate; the fixed shaft is connected with the geometric center of the wire connecting wheel through a coupler; the bottom end of the wire wheel is fixedly connected with the turntable; the rotary table is arranged on the mounting plate; a second driving box is arranged at the bottom end of the mounting plate corresponding to the rotary disc; the mounting frame is provided with an adjusting mechanism corresponding to the mounting plate; the bottom end of the connecting plate is provided with a protective device corresponding to the wire wheel; the bottom end of the mounting plate is fixedly connected with the base through a positioning column; and a pulling handle is arranged at the top of the base.
As a further scheme of the invention: the adjusting mechanism comprises a first driving box and a second limiting rail; the first driving box and the second limiting rail are both arranged on the mounting frame; a servo motor is arranged in the first driving box; the servo motor is connected with a gear through a coupler; the gear is meshed with the ball nut; a lead screw is rotatably arranged on the ball nut; one end of the screw rod extends out of the driving box and extends into the second limiting rail and is connected with the mounting plate through the rolling bearing.
As a further scheme of the invention: the mounting plate comprises a bottom plate; the top of the bottom plate is provided with a damping plate; one side of the damping plate is provided with a sliding plate corresponding to the second limiting rail; one part of the sliding plate extends into the second limiting rail and is connected with the second limiting rail in a sliding manner; the shock absorption plate is provided with a mounting groove corresponding to the rotary disc.
As a further scheme of the invention: a rolling bearing is arranged at the joint of the fixed shaft and the connecting plate; one end of the connecting plate is provided with a limiting sliding plate; the limiting sliding plate is connected with a first limiting rail in a sliding manner; the first limit rail is arranged on the mounting frame.
As a further scheme of the invention: the positioning column comprises a fixed pipe and a movable pipe; the top end of the movable pipe is connected with the bottom end of the mounting plate; the bottom end of the movable pipe extends into the fixed pipe; the bottom end of the movable pipe is provided with a limiting block; and a pressure spring is adjusted on the movable pipe.
As a further scheme of the invention: the protection mechanism comprises a first partition plate and a second partition plate; a second driving box and a limiting channel are arranged on the second partition plate corresponding to the wire wheel; the second driving box is arranged on one side, close to the mounting frame, of the second partition plate; limiting rods are arranged on two sides of the top of the wire wheel; one end of the limiting rod, which is far away from the wire wheel, is provided with a ball; rolling tracks are arranged on the first partition plate and the second partition plate corresponding to the balls.
As a further scheme of the invention: and the solar photovoltaic power generation device is installed at the top end of the connecting plate.
As a further scheme of the invention: the bottom end of the base is provided with a moving mechanism; the moving mechanism comprises a supporting rod; at least four support rods are arranged; the bottom end of the supporting rod is provided with a lifting box; a lifting mechanism is arranged inside the lifting box; the bottom end of the lifting mechanism is correspondingly connected with universal wheels.
Compared with the prior art, the invention has the beneficial effects that: through the arrangement of the first driving box, the second limiting rail and the mounting plate, the height of the wire wheel can be adjusted, and the wire wheel is convenient for workers with different heights to use; through the arrangement of the positioning columns, the height of the adjusting mechanism is more stable when adjusted; through the arrangement of the first partition plate, the second driving box, the balls, the limiting rods and the rolling tracks, the stability of the wire wheel during rotation and the uniform winding and pulling-out of the cable can be ensured, so that workers are protected; energy can be saved through the solar photovoltaic power generation device; through the setting of elevating system, can receive the universal wheel inside the lifting cabinet, it is more convenient to use. In conclusion, the invention has the advantages of convenient use and high working efficiency.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic view of the structure of the mounting plate of the present invention.
In the figure: the solar photovoltaic power generation device comprises a mounting frame 1, a limiting rail 2, a limiting rail 3, a solar photovoltaic power generation device 4, a connecting plate 5, a control panel 6, a driving box 7, a partition plate 7, a fixing shaft 8, a wire wheel 9, a mounting plate 10, a turntable 11, a positioning column 12, a driving box 13, a pulling handle 14, a base 15, a moving mechanism 16, a limiting rail II 17, a bottom plate 18, a sliding plate 19 and a damping plate 20.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
Example 1
Referring to fig. 1-2, in an embodiment of the present invention, a laying device for communication wires includes an installation frame 1; a control panel 5 is arranged on one side of the mounting rack 1; the other side of the mounting rack 1 is provided with a connecting plate 4; a fixed shaft 8 is arranged at the bottom end of the connecting plate 4; the fixed shaft 8 is connected with the geometric center of the wire wheel 9 through a coupler; the bottom end of the wire wheel 9 is fixedly connected with a turntable 11; the rotary table 11 is arranged on the mounting plate 10; a second driving box 13 is arranged at the bottom end of the mounting plate 10 corresponding to the rotary table 11; an adjusting mechanism is arranged on the mounting rack 1 corresponding to the mounting plate 10; the bottom end of the connecting plate 4 is provided with a protective device corresponding to the wire wheel 9; the bottom end of the mounting plate 10 is fixedly connected with a base 15 through a positioning column; the top of the base 15 is provided with a pulling handle 14.
Further, the adjusting mechanism comprises a first driving box 6 and a second limiting rail 17; the first driving box 6 and the second limiting rail 17 are both arranged on the mounting frame 1; a servo motor is arranged in the first driving box 6; the servo motor is connected with a gear through a coupler; the gear is meshed with the ball nut; a lead screw is rotatably arranged on the ball nut; one end of the screw rod extends out of the driving box 6 and extends into the second limit rail 17 and is connected with the mounting plate 10 through a rolling bearing.
Further, the mounting plate 10 includes a base plate 18; the top of the bottom plate 18 is provided with a damping plate 20; one side of the damping plate 20 is provided with a sliding plate 19 corresponding to the second limit rail 17; one part of the sliding plate 19 extends into the second limiting rail 17 and is connected with the second limiting rail 17 in a sliding manner; the damping plate 20 is provided with a mounting groove corresponding to the rotary table 11; through the arrangement of the first driving box 6, the second limiting rail 17 and the mounting plate 10, the height of the wire wheel 9 can be adjusted, and the wire wheel is convenient for workers with different heights to use.
Furthermore, a rolling bearing is arranged at the joint of the fixed shaft 8 and the connecting plate 4; one end of the connecting plate 4 is provided with a limiting sliding plate; the limiting sliding plate is connected with a first limiting rail 2 in a sliding manner; no. one spacing rail 2 sets up on mounting bracket 1.
Further, the positioning column comprises a fixed pipe and a movable pipe; the top end of the movable tube is connected with the bottom end of the mounting plate 10; the bottom end of the movable pipe extends into the fixed pipe; the bottom end of the movable pipe is provided with a limiting block; a pressure spring is adjusted on the movable pipe; through the setting of reference column, more stable when adjustment mechanism height-adjusting.
Further, the protection mechanism comprises a first partition plate 7 and a second partition plate 12; a second driving box 13 and a limiting channel are arranged on the second partition plate 12 corresponding to the wire wheel 9; the second driving box 13 is arranged on one side, close to the mounting frame 1, of the second partition plate 12; limiting rods are arranged on two sides of the top of the wire wheel 9; one end of the limiting rod, which is far away from the wire wheel 9, is provided with a ball; rolling tracks are arranged on the first partition plate 7 and the second partition plate 12 corresponding to the balls; through setting up of a baffle 7, No. two baffles 12, No. two drive casees 13, ball, gag lever post and rolling track, stability when can guaranteeing wire wheel 9 and rotate, and the even rolling and the pulling-out of cable, and then protection staff promotes staff work efficiency.
Further, a solar photovoltaic power generation device 3 is mounted at the top end of the connecting plate 4; energy can be saved by the solar photovoltaic power generation device 3.
Example 2
Referring to fig. 1, a moving mechanism 16 is installed at the bottom end of the base 15; the moving mechanism 16 includes a support rod; at least four support rods are arranged; the bottom end of the supporting rod is provided with a lifting box; a lifting mechanism is arranged inside the lifting box; the bottom end of the lifting mechanism is correspondingly connected with a universal wheel; through the setting of elevating system, can receive the universal wheel inside the lifting cabinet, it is more convenient to use.
The working principle of the invention is as follows: through the arrangement of the first driving box 6, the second limiting rail 17 and the mounting plate 10, the height of the wire wheel 9 can be adjusted, and workers with different heights can use the wire wheel conveniently; through the arrangement of the positioning columns, the height of the adjusting mechanism is more stable when adjusted; through the arrangement of the first partition plate 7, the second partition plate 12, the second driving box 13, the balls, the limiting rods and the rolling tracks, the stability of the wire wheel 9 during rotation and the uniform winding and pulling-out of the cable can be ensured, so that workers are protected; energy can be saved through the solar photovoltaic power generation device 3; through the setting of elevating system, can receive the universal wheel inside the lifting cabinet, it is more convenient to use. In conclusion, the invention has the advantages of convenient use and high working efficiency.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (8)

1. A laying device for communication wires comprises a mounting frame (1); the device is characterized in that a control panel (5) is installed on one side of the mounting rack (1); a connecting plate (4) is arranged on the other side of the mounting rack (1); a fixed shaft (8) is installed at the bottom end of the connecting plate (4); the fixed shaft (8) is connected with the geometric center of the wire connecting wheel (9) through a coupler; the bottom end of the wire wheel (9) is fixedly connected with a turntable (11); the rotary table (11) is arranged on the mounting plate (10); a second driving box (13) is arranged at the bottom end of the mounting plate (10) corresponding to the rotary table (11); an adjusting mechanism is arranged on the mounting rack (1) corresponding to the mounting plate (10); the bottom end of the connecting plate (4) is provided with a protective device corresponding to the wire wheel (9); the bottom end of the mounting plate (10) is fixedly connected with a base (15) through a positioning column; and a pulling handle (14) is arranged at the top of the base (15).
2. Laying device for communication wires according to claim 1, characterised in that said adjustment mechanism comprises a first driving box (6) and a second limit rail (17); the first driving box (6) and the second limiting rail (17) are both arranged on the mounting frame (1); a servo motor is arranged in the first driving box (6); the servo motor is connected with a gear through a coupler; the gear is meshed with the ball nut; a lead screw is rotatably arranged on the ball nut; one end of the screw rod extends out of the driving box (6) and extends into the second limiting rail (17) and is connected with the mounting plate (10) through a rolling bearing.
3. Laying device for telecommunication wires according to claim 2, characterized in that said mounting plate (10) comprises a base plate (18); the top of the bottom plate (18) is provided with a damping plate (20); one side of the damping plate (20) is provided with a sliding plate (19) corresponding to the second limit rail (17); one part of the sliding plate (19) extends into the second limiting rail (17) and is connected with the second limiting rail (17) in a sliding manner; the damping plate (20) is provided with a mounting groove corresponding to the rotary disc (11).
4. The laying device for communication wires according to claim 1, characterized in that a rolling bearing is mounted at the junction of the fixed shaft (8) and the connection plate (4); one end of the connecting plate (4) is provided with a limiting sliding plate; the limiting sliding plate is connected with a first limiting rail (2) in a sliding manner; the first limiting rail (2) is arranged on the mounting frame (1).
5. The laying device for communication wires according to claim 1, wherein the positioning post comprises a fixed pipe and a movable pipe; the top end of the movable pipe is connected with the bottom end of the mounting plate (10); the bottom end of the movable pipe extends into the fixed pipe; the bottom end of the movable pipe is provided with a limiting block; and a pressure spring is adjusted on the movable pipe.
6. The laying device for communication wires according to claim 1, characterized in that said protection means comprise a first (7) and a second (12) bulkhead; a second driving box (13) and a limiting channel are arranged on the second partition plate (12) corresponding to the wire wheel (9); the second driving box (13) is arranged on one side, close to the mounting frame (1), of the second partition plate (12); limiting rods are arranged on two sides of the top of the wire wheel (9); one end of the limiting rod, which is far away from the wire wheel (9), is provided with a ball; rolling tracks are arranged on the first partition plate (7) and the second partition plate (12) corresponding to the balls.
7. The laying device for communication wires according to claim 1, characterized in that a solar photovoltaic power generation device (3) is mounted on the top end of the connection plate (4).
8. The laying device for communication wires according to claim 1, characterized in that a moving mechanism (16) is mounted to the bottom end of the base (15); the moving mechanism (16) comprises a support bar; at least four support rods are arranged; the bottom end of the supporting rod is provided with a lifting box; a lifting mechanism is arranged inside the lifting box; the bottom end of the lifting mechanism is correspondingly connected with universal wheels.
CN202010394924.XA 2020-05-12 2020-05-12 Laying device for communication wire Pending CN111675052A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010394924.XA CN111675052A (en) 2020-05-12 2020-05-12 Laying device for communication wire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010394924.XA CN111675052A (en) 2020-05-12 2020-05-12 Laying device for communication wire

Publications (1)

Publication Number Publication Date
CN111675052A true CN111675052A (en) 2020-09-18

Family

ID=72434012

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010394924.XA Pending CN111675052A (en) 2020-05-12 2020-05-12 Laying device for communication wire

Country Status (1)

Country Link
CN (1) CN111675052A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206232247U (en) * 2016-11-30 2017-06-09 中建七局第四建筑有限公司 A kind of removable cable pulling rope device
US20180282108A1 (en) * 2017-03-30 2018-10-04 Triple C Manufacturing, Inc. Hydraulic Truck Bed Reel Lift Apparatus
CN109850696A (en) * 2018-11-27 2019-06-07 国网山东省电力公司烟台供电公司 A kind of dress table wiring actinobacillus device
CN209275893U (en) * 2018-09-07 2019-08-20 宝胜(宁夏)线缆科技有限公司 A kind of cable draw off gear with draw-in and draw-off function
CN110817568A (en) * 2019-11-20 2020-02-21 刘涛 Electric wire unwinding device for electric power grid line laying
US20200114799A1 (en) * 2018-10-12 2020-04-16 Trinity Bay Equipment Holdings, LLC Installation trailer for coiled flexible pipe and method of utilizing same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206232247U (en) * 2016-11-30 2017-06-09 中建七局第四建筑有限公司 A kind of removable cable pulling rope device
US20180282108A1 (en) * 2017-03-30 2018-10-04 Triple C Manufacturing, Inc. Hydraulic Truck Bed Reel Lift Apparatus
CN209275893U (en) * 2018-09-07 2019-08-20 宝胜(宁夏)线缆科技有限公司 A kind of cable draw off gear with draw-in and draw-off function
US20200114799A1 (en) * 2018-10-12 2020-04-16 Trinity Bay Equipment Holdings, LLC Installation trailer for coiled flexible pipe and method of utilizing same
CN109850696A (en) * 2018-11-27 2019-06-07 国网山东省电力公司烟台供电公司 A kind of dress table wiring actinobacillus device
CN110817568A (en) * 2019-11-20 2020-02-21 刘涛 Electric wire unwinding device for electric power grid line laying

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Application publication date: 20200918