CN111613387A - Threading device for through ground wire production and through ground wire production process - Google Patents

Threading device for through ground wire production and through ground wire production process Download PDF

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Publication number
CN111613387A
CN111613387A CN202010483776.9A CN202010483776A CN111613387A CN 111613387 A CN111613387 A CN 111613387A CN 202010483776 A CN202010483776 A CN 202010483776A CN 111613387 A CN111613387 A CN 111613387A
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CN
China
Prior art keywords
threading groove
rotating roller
threading
vertical rotating
groove
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
CN202010483776.9A
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Chinese (zh)
Inventor
成路
王伟强
王天顺
刘香磊
尚爱民
杨永谦
吕秀武
王永青
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.)
Jiaozuo Railway Cable Co Ltd
Original Assignee
Jiaozuo Railway 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 Jiaozuo Railway Cable Co Ltd filed Critical Jiaozuo Railway Cable Co Ltd
Priority to CN202010483776.9A priority Critical patent/CN111613387A/en
Publication of CN111613387A publication Critical patent/CN111613387A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/0036Details
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/22Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/0006Apparatus or processes specially adapted for manufacturing conductors or cables for reducing the size of conductors or cables
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/004Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing rigid-tube cables
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/224Sheathing; Armouring; Screening; Applying other protective layers by drawing a cable core into an oversized tube by means of a tow line

Abstract

The invention belongs to the technical field of railway cable production equipment, and particularly relates to a threading device for producing a through ground wire and a production process of the through ground wire. The device comprises a threading groove and a support frame arranged at the bottom of the threading groove and used for supporting the threading groove; a plurality of strip-shaped pores are formed in the bottom of the threading groove in parallel and are vertical to the plane where the side wall of the threading groove is located; a first horizontal rotating roller is arranged in the strip-shaped pore; a partition board is fixedly arranged in the threading groove and divides the threading groove into a plurality of threading groove units; a left vertical rotating roller and a right vertical rotating roller are respectively arranged on the left side and the right side of the threading groove; the left vertical rotating roller is positioned on the outer side of the left side wall of the threading groove; the right vertical rotating roller is positioned on the outer side of the right side wall of the threading groove; the bottom ends of the rotating shafts of the left and right vertical rotating rollers are connected with the supporting frame. The device can simultaneously carry out the drawing forming of copper pipe and the processes of pipe arrangement and cable core threading, improves the overall production efficiency by nearly one time, and obviously improves the production efficiency.

Description

Threading device for through ground wire production and through ground wire production process
Technical Field
The invention belongs to the technical field of railway cable production equipment, and particularly relates to a threading device for producing a through ground wire and a production process of the through ground wire.
Background
The railway through ground wire is a unified grounding cable which integrates a traction power supply backflow system, an electric power supply system, a signal system, a communication and other electronic information system, a building, a track bed, a platform, a bridge, a sound barrier and the like along the railway, can ensure that the grounding potentials of all working points of a railway electrical appliance system used in a large range are basically kept consistent, ensures that system equipment is grounded safely and reliably, eliminates unbalanced current caused by potential differences among different equipment, and realizes effective and reliable protection on personnel and equipment.
The current process for producing the railway through ground wire mainly comprises the following steps: pipe distribution, steel wire blowing, stranded wire traction, drawing and forming; the process of pipe distribution comprises the steps of firstly distributing a copper pipe into a threading device, then blowing a traction steel wire rope into the copper pipe and drawing a copper stranded wire, and finally drawing and forming the copper pipe in the threading device through a copper pipe drawing machine. For example, patent CN107785122B discloses a process for preparing a seamless through ground wire, which comprises the steps of straightening a sheath, threading a cable core, rolling, annealing, post-processing and the like, and the outer diameter of the sheath is reduced by adopting a rolling process, so that the occupied area of equipment is small, the problem of fracture caused by a drawing process is effectively avoided, and compared with the drawing process, the rolling process has higher speed and improves the processing efficiency. However, the process has the disadvantages that the threading device is a single-layer threading groove, when rolling operation is carried out in the threading groove, pipe distribution, steel wire blowing and stranded wire traction cannot be carried out simultaneously, and the production process can be carried out after the pipe distribution is finished, so that the improvement degree of the processing efficiency is limited.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a threading device for producing a through ground wire, which can simultaneously carry out wiring and production and improve the production efficiency by nearly one time; based on a general inventive concept, the invention also comprises a process for producing the through ground wire by using the device.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a threading device for producing a through ground wire comprises a threading groove and a support frame arranged at the bottom of the threading groove and used for supporting the threading groove;
a plurality of strip-shaped pores are formed in the bottom of the threading groove in parallel, and the strip-shaped pores are perpendicular to the plane where the side wall of the threading groove is located; a first horizontal rotating roller is arranged in the strip-shaped hole, and two ends of a rotating shaft of the first horizontal rotating roller are connected with the supporting frame;
a partition board is fixedly arranged in the threading groove and divides the threading groove into a plurality of threading groove units;
a left vertical rotating roller and a right vertical rotating roller are respectively arranged on the left side and the right side of the threading groove; the left vertical rotating roller is positioned on the outer side of the left side wall of the threading groove; the right vertical rotating roller is positioned on the outer side of the right side wall of the threading groove; the bottom ends of the rotating shafts of the left and right vertical rotating rollers are connected with the supporting frame.
Preferably, a partition board is arranged in the threading groove along the horizontal direction, and two sides of the partition board are fixedly connected with the side wall of the threading groove; the inside threading groove that will pass through the line groove is divided into to the baffle goes up threading groove and lower threading groove.
Preferably, the partition plate is also provided with a plurality of strip-shaped pores; a second horizontal rotating roller is arranged in the strip-shaped pore; the second horizontal rotating roller and the first horizontal rotating roller are arranged in parallel; two ends of a rotating shaft of the second horizontal rotating roller are connected with the side wall of the upper threading groove.
Preferably, the left vertical rotating roller comprises an upper left vertical rotating roller positioned outside the upper threading groove and a lower left vertical rotating roller positioned outside the lower threading groove; the bottom end of the rotating shaft of the upper left vertical rotating roller is connected with the top end of the rotating shaft of the lower left vertical rotating roller; the bottom end of the rotating shaft of the lower left vertical rotating roller is connected with the supporting frame.
Preferably, the right vertical rotating roller comprises a right upper vertical rotating roller positioned outside the upper threading groove and a right lower vertical rotating roller positioned outside the lower threading groove; the bottom end of the rotating shaft of the upper right vertical rotating roller is connected with the top end of the rotating shaft of the lower right vertical rotating roller; the bottom end of the rotating shaft of the lower right vertical rotating roller is connected with the supporting frame.
Preferably, the top of the threading groove is provided with a cover plate; the cover plate is arranged to prevent dust and sundries from falling into the threading groove to affect the pipe arrangement.
Preferably, the bottom of support frame is equipped with the pulley, the threading device bulk movement of being convenient for.
Based on a general inventive concept, the invention also comprises a process for producing the through ground wire by using the threading device, and the process specifically comprises the following steps:
1) pipe distribution: straightening the disc-shaped copper pipe, and guiding the straightened copper pipe into any threading groove unit of the threading device; 2) threading a cable core: a cable core formed by the copper stranded wire is penetrated into the copper pipe which is finished with pipe distribution by using a winding device; 3) drawing and forming: simultaneously placing the cable core and the copper pipe in a drawing machine for drawing and molding; 4) and in the drawing forming process of the step 3), performing the pipe arrangement operation of the step 1) in other threading groove units of the threading device at the same time.
Preferably, in the process of penetrating the cable core in the step 2), the steel wire rope is firstly led into the copper pipe; the end part of the steel wire rope firstly penetrating out of the copper pipe is connected with the copper stranded wire, and the steel wire rope is twisted by a winch to lead the copper stranded wire in and out of the copper pipe.
The invention has the beneficial effects that:
when any threading groove in the threading device is subjected to drawing forming operation after the completion of the pipe distribution and the cable core threading of the copper pipe, other threading groove units can simultaneously perform the pipe distribution and the cable core threading of the copper pipe, namely the threading device can simultaneously produce at least two through ground wires. Compared with the prior threading groove which can only produce one through ground wire at the same time, the process of arranging the copper pipe and threading the cable core can only be respectively carried out with the drawing production process, the overall production efficiency of the invention is improved by more than one time.
Drawings
Fig. 1 is a schematic view of the structure of the threading device of the present invention;
fig. 2 is a schematic view of a through ground wire production line formed by the threading device;
FIG. 3 is an enlarged view taken at A in FIG. 2;
fig. 4 is an enlarged view at B in fig. 2.
In the figure, 1, a threading device, 2, a first horizontal rotating roller, 3, a partition board, 4, an upper threading groove, 5, a lower threading groove, 6, a second horizontal rotating roller, 7, an upper left vertical rotating roller, 8, a lower left vertical rotating roller, 9, an upper right vertical rotating roller, 10, a lower right vertical rotating roller, 11, a left support, 12, a right support, 13, a cover plate, 14, a top support, 15, a pulley, 16, a support frame, 20, a copper pipe unreeling machine, 21, a pinch roller, 22, a straightening machine, 30, a winch, 31, a copper stranded wire unreeling machine, 40, No. 1 drawing machine, 41, a linear type loop buffer device, 42, No. 2 drawing machine, 43, No. 3 drawing machine, 44, a portal frame reeling machine, 46 and a heading machine.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments. It should be noted that the terms "upper", "lower", "left", "right", "inner" and "outer" in the embodiments are only used to clarify the relative positional relationship of the respective structures, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical contents.
Examples
A threading device for producing a through ground wire is disclosed, as shown in figures 1-3, and comprises a threading groove and a support frame 16 arranged at the bottom of the threading groove and used for supporting the threading groove.
In this embodiment, the longitudinal section of the threading slot is in a U-shaped structure. A plurality of strip-shaped pores are formed in the bottom of the threading groove in parallel and are vertical to the plane where the side wall of the threading groove is located; a first horizontal rotating roller 2 is arranged in the strip-shaped hole, and two ends of a rotating shaft of the first horizontal rotating roller 2 are connected with a support frame 16 positioned at the bottom of the threading groove. In order to facilitate disassembly, a left bracket 11 and a right bracket 12 are respectively welded on the left side and the right side of the top of the support frame 16, and the left end of the rotating shaft of the first horizontal rotating roller 2 is detachably connected with the left bracket 11 through a bolt; the right end of the rotating shaft of the first horizontal rotating roller 2 is detachably connected with the right bracket 12 through a bolt.
The partition plate 3 is arranged in the threading groove along the horizontal direction, and the two sides of the partition plate 3 are integrally welded with the side wall of the threading groove. The partition board 3 divides the inside of the threading groove into an upper threading groove 4 and a lower threading groove 5. The partition board 3 is also provided with a plurality of strip-shaped pores; a second horizontal rotating roller 6 is arranged in the strip-shaped pore. The second horizontal rotating roller 6 is arranged in parallel with the first horizontal rotating roller 2; two ends of a rotating shaft of the second horizontal rotating roller 6 are fixedly connected with the side wall of the upper threading groove 4.
The first horizontal rotating roller 2 is a galvanized unpowered carrier roller with the diameter of 50mm and the length of 150mm, and is arranged at the bottom of the tank every 3 meters; the second horizontal rotating roller 6 is a galvanized unpowered carrier roller with the diameter of 25mm and the length of 135mm, and is arranged on the partition plate 3 every 3 meters; the friction of the copper pipe on the partition plate 3 or the bottom of the threading groove during pipe distribution, steel wire blowing and drawing production can be reduced by arranging the horizontal rotating roller.
And a left vertical rotating roller and a right vertical rotating roller are respectively arranged on the left side and the right side of the threading groove. The left vertical rotating roller comprises an upper left vertical rotating roller 7 positioned outside the upper threading groove 4 and a lower left vertical rotating roller 8 positioned outside the lower threading groove 5; the bottom end of the rotating shaft of the upper left vertical rotating roller 7 is welded with the top end of the rotating shaft of the lower left vertical rotating roller 8; the bottom end of the rotating shaft of the lower left vertical rotating roller 8 is welded with the support frame 16;
the right vertical rotating roller comprises a right upper vertical rotating roller 9 positioned outside the upper threading groove 4 and a right lower vertical rotating roller 10 positioned outside the lower threading groove 5; the bottom end of the rotating shaft of the upper right vertical rotating roller 9 is welded with the top end of the rotating shaft of the lower right vertical rotating roller 10; the bottom end of the rotating shaft of the lower right vertical rotating roller 10 is welded with a support frame 16;
the left upper vertical rotating roller 7, the left lower vertical rotating roller 8, the right upper vertical rotating roller 9 and the right lower vertical rotating roller 10 are all galvanized unpowered carrier rollers with the diameter of 50mm and the length of 80 mm. The ends of the rotating shafts of the upper left vertical rotating roller and the lower left vertical rotating roller and the ends of the rotating shafts of the upper right vertical rotating roller and the lower right vertical rotating roller are welded to form two sections of rollers which can respectively and independently rotate, so that friction between a copper pipe or a steel wire rope and the side wall of the threading groove is reduced, and abrasion of the copper pipe and the threading groove is reduced.
In order to prevent dust and sundries from falling into the threading groove to influence the pipe arrangement, the top of the upper threading groove 4 is provided with a cover plate 13; the cover plate 13 is fixedly connected with a top support 14 arranged at the top of the upper threading groove 4 through a self-tapping screw, and the top support 14 is fixed at the top of the upper threading groove 4 through a bolt.
In this embodiment, the length of the threading groove is 6m or 9m, and a plurality of threading devices 1 are moved to end-to-end positions to form a through ground wire production line with a total length of 350-620 m, so as to produce through ground wires with different lengths. Since the overall length of the production line is long and limited by the space in the production workshop 50, the production line usually needs to go around a circle in the production workshop 50, and in order to facilitate the adjustment of the position of the threading device 1, the bottom of the supporting frame 16 can be provided with a pulley 15, and the threading device 1 with the pulley 15 is arranged near the turn or passage of the production workshop 50.
The production of the through ground wire by using the wire threading device in the embodiment specifically comprises the following steps:
1) pipe distribution: sending the disc-shaped copper pipe on the copper pipe unreeling machine 20 into a straightening machine 22 through a pinch roll 21 for straightening operation, and guiding the straightened copper pipe into a lower threading groove;
2) threading a cable core: after the pipe distribution is finished, guiding the steel wire rope on the winch 30 into the copper pipe; in the process of introducing the steel wire rope, firstly connecting a plastic guide head at the end part of the steel wire rope, and blowing air into the copper pipe by using an air compressor; because the end part of the plastic guide head is circular, the diameter of the plastic guide head is slightly smaller than that of the copper pipe, and after air is introduced into the copper pipe, the plastic guide head moves forwards under the action of the air, so that the steel wire rope is driven to move forwards until the steel wire rope penetrates out of the copper pipe; then removing the plastic guide head at the end part of the steel wire rope, connecting the end part of the steel wire rope with the copper stranded wire on the copper stranded wire unreeling machine 31, rotating the winch 30 to withdraw the steel wire rope, and introducing and guiding the copper stranded wire out of the copper pipe;
3) drawing and forming: placing the copper pipe with the cable core penetrated and the cable core into a head pressing machine 46 at the same time, and guiding the copper pipe and the cable core into a drawing machine through a pinch roll 21 for drawing forming; in the present embodiment, the copper tube is subjected to three drawing operations sequentially by a first drawing machine 40, a second drawing machine 42 and a third drawing machine 43; wherein the first drawing machine is an 8T drawing machine, the second and third drawing machines are 5T drawing machines, and linear loop buffer devices 41 are arranged between the first and second drawing machines and between the second and third drawing machines; finally, the through ground wire formed after the three-time drawing is wound into a disc by a portal frame winding machine 44;
4) and in the process of drawing and forming the copper pipe in the step 3), carrying out new pipe distribution and cable core penetrating operation in the upper threading groove.
The production process that goes on in the above-mentioned upper and lower threading groove can exchange each other, promptly, when drawing the shaping operation in last threading groove, can carry out stringing and tube cable core operation in the lower threading groove in the same period.
In the embodiment, the upper threading groove and the lower threading groove are arranged, and two through ground wires are produced simultaneously by using one set of production equipment, so that the processes of pipe distribution and cable core threading are synchronously performed with the process of drawing and forming a copper pipe; in the existing production process, the processes of pipe distribution and cable threading and the drawing and forming process of the copper pipe cannot be carried out simultaneously, namely one set of production equipment can only produce one through ground wire at the same time; and the drawing process of the copper pipe is long in time consumption, so that the production efficiency of the through ground wire is limited. Compared with the existing production process, the production efficiency of the through ground wire production process is doubled.
The above is only the best mode of the invention, the groove bottom and the side wall of the threading groove in the above embodiments are integrally formed by punching and forming the 304 stainless steel plate; the cover plate and the baffle plate are made of 304 stainless steel plates with the thickness of 3mm, and the used materials and the thickness can be other.
In addition, in the above embodiment, a horizontal partition plate is arranged in the threading groove, so that the threading groove is divided into an upper threading groove and a lower threading groove; the partition plate can also be arranged along the vertical direction, so that the threading groove is divided into a left threading groove and a right threading groove; the above embodiment can achieve the same technical effects as the above embodiment; any other modifications which do not depart from the spirit and concept of the invention are deemed to be within the scope of the invention as it may be practiced.

Claims (9)

1. The utility model provides a threading device for lining up ground wire production which characterized in that: the device comprises a threading groove and a support frame arranged at the bottom of the threading groove and used for supporting the threading groove;
a plurality of strip-shaped pores are formed in the bottom of the threading groove in parallel, and the strip-shaped pores are perpendicular to the plane where the side wall of the threading groove is located; a first horizontal rotating roller is arranged in the strip-shaped hole, and two ends of a rotating shaft of the first horizontal rotating roller are connected with the supporting frame;
a partition board is fixedly arranged in the threading groove and divides the threading groove into a plurality of threading groove units;
a left vertical rotating roller and a right vertical rotating roller are respectively arranged on the left side and the right side of the threading groove; the left vertical rotating roller is positioned on the outer side of the left side wall of the threading groove; the right vertical rotating roller is positioned on the outer side of the right side wall of the threading groove; the bottom ends of the rotating shafts of the left and right vertical rotating rollers are connected with the supporting frame.
2. The threading device of claim 1, wherein: a partition board is arranged in the threading groove along the horizontal direction, and two sides of the partition board are fixedly connected with the side wall of the threading groove; the inside threading groove that will pass through the line groove is divided into to the baffle goes up threading groove and lower threading groove.
3. The threading device of claim 2, wherein: the partition plate is also provided with a plurality of strip-shaped pores; a second horizontal rotating roller is arranged in the strip-shaped pore; the second horizontal rotating roller and the first horizontal rotating roller are arranged in parallel; two ends of a rotating shaft of the second horizontal rotating roller are connected with the side wall of the upper threading groove.
4. The threading device of claim 2, wherein: the left vertical rotating roller comprises an upper left vertical rotating roller positioned outside the upper threading groove and a lower left vertical rotating roller positioned outside the lower threading groove; the bottom end of the rotating shaft of the upper left vertical rotating roller is connected with the top end of the rotating shaft of the lower left vertical rotating roller; the bottom end of the rotating shaft of the lower left vertical rotating roller is connected with the supporting frame.
5. The threading device of claim 2, wherein: the right vertical rotating roller comprises a right upper vertical rotating roller positioned outside the upper threading groove and a right lower vertical rotating roller positioned outside the lower threading groove; the bottom end of the rotating shaft of the upper right vertical rotating roller is connected with the top end of the rotating shaft of the lower right vertical rotating roller; the bottom end of the rotating shaft of the lower right vertical rotating roller is connected with the supporting frame.
6. The threading device of claim 1, wherein: and a cover plate is arranged at the top of the threading groove.
7. The threading device of claim 1, wherein: and pulleys are arranged at the bottom of the support frame.
8. The process for producing the through ground wire by using the threading device of claim 1 is characterized by comprising the following steps:
1) pipe distribution: straightening the disc-shaped copper pipe, and guiding the straightened copper pipe into any threading groove unit of the threading device; 2) threading a cable core: a cable core formed by the copper stranded wire is penetrated into the copper pipe which is finished with pipe distribution by using a winding device; 3) drawing and forming: simultaneously placing the cable core and the copper pipe in a drawing machine for drawing and molding; 4) and in the drawing forming process of the step 3), performing the pipe arrangement operation of the step 1) in other threading groove units of the threading device at the same time.
9. The process of claim 8, wherein: in the process of penetrating the cable core in the step 2), firstly, guiding the steel wire rope into the copper pipe; the end part of the steel wire rope firstly penetrating out of the copper pipe is connected with the copper stranded wire, and the steel wire rope is twisted by a winch to lead the copper stranded wire into and out of the copper pipe.
CN202010483776.9A 2020-06-01 2020-06-01 Threading device for through ground wire production and through ground wire production process Pending CN111613387A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010483776.9A CN111613387A (en) 2020-06-01 2020-06-01 Threading device for through ground wire production and through ground wire production process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010483776.9A CN111613387A (en) 2020-06-01 2020-06-01 Threading device for through ground wire production and through ground wire production process

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Publication Number Publication Date
CN111613387A true CN111613387A (en) 2020-09-01

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Application Number Title Priority Date Filing Date
CN202010483776.9A Pending CN111613387A (en) 2020-06-01 2020-06-01 Threading device for through ground wire production and through ground wire production process

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112571335A (en) * 2020-12-04 2021-03-30 中国科学院力学研究所 Internal pulling type processing and manufacturing device of coaxial thermocouple transient heat flow sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112571335A (en) * 2020-12-04 2021-03-30 中国科学院力学研究所 Internal pulling type processing and manufacturing device of coaxial thermocouple transient heat flow sensor

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