A threading device for producing through-ground wires and a production process for through-ground wires

Abstract

The present invention belongs to the technical field of railway cable production equipment, and specifically relates to a threading device for producing through-ground wires and a production process for through-ground wires. The device includes a threading trough and a support frame arranged at the bottom of the threading trough for supporting the threading trough; a plurality of strip-shaped pores are parallelly opened at the bottom of the threading trough, and the strip-shaped pores are perpendicular to the plane where the side walls of the threading trough are located; a first horizontal rotating roller is arranged in the strip-shaped pores; a partition is fixed in the threading trough, and the partition divides the threading trough into a plurality of threading trough units; a left vertical rotating roller and a right vertical rotating roller are respectively arranged on the left and right sides of the threading trough; the left vertical rotating roller is located on the outside of the left side wall of the threading trough; the right vertical rotating roller is located on the outside of the right side wall of the threading trough; the bottom ends of the rotating shafts of the left and right vertical rotating rollers are connected to the support frame. The device can simultaneously carry out the drawing and forming of copper tubes and the processes of laying tubes and threading cable cores, and the overall production efficiency is nearly doubled, which significantly improves the production efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of railway cable production equipment, and in particular relates to a threading device for producing a through-ground wire and a production process of the through-ground wire. Background Art

[0002] The railway through-ground wire is a unified grounding cable that connects the traction power supply return system, power supply system, signal system, communication and other electronic information systems, buildings, roadbeds, platforms, bridges, sound barriers, etc. along the railway. It can ensure that the grounding potential of each working point of the railway electrical system used in a wide range remains basically consistent, making the grounding of system equipment safe and reliable, eliminating the unbalanced current caused by the potential difference between different equipment, and realizing effective and reliable protection of personnel and equipment.

[0003] At present, the process steps for producing railway through-ground wires are mainly: pipe laying-blowing steel wire-pulling stranded wire-drawing and forming; wherein the pipe laying process is to first lay the copper pipe into the threading device, then blow the traction steel wire rope into the copper pipe and pull the copper stranded wire over, and finally draw the copper pipe in the threading device into shape through the copper pipe drawing machine. For example, patent CN107785122B discloses a preparation process for seamless through-ground wires, which uses a rolling process to reduce the outer diameter of the sheath through the steps of sheath straightening, cable core threading, rolling, annealing, post-processing, etc., so that the equipment occupies a small area and effectively avoids the problem of fracture caused by the drawing process. Compared with the drawing process, the rolling process used has a higher speed and improves the processing efficiency. However, the disadvantage of this process is that the threading device used is a single-layer threading groove. When the rolling operation is performed in the threading groove, it is impossible to lay the pipe, blow the steel wire, and pull the stranded wire at the same time, and the above production process needs to be carried out after the pipe laying is completed, so the degree of improvement in processing efficiency is limited. Summary of the invention

[0004] In order to solve the above-mentioned technical problems, the purpose of the present invention is to propose a threading device for the production of through-ground wires, which can perform wiring and production at the same time, thereby nearly doubling the production efficiency; based on a general inventive concept, the present invention also includes a process for producing through-ground wires using the device.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0006] A threading device for ground wire production, the device comprising a threading trough and a support frame arranged at the bottom of the threading trough for supporting the threading trough;

[0007] A plurality of strip-shaped pores are parallelly provided at the bottom of the threading groove, 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 provided in the strip-shaped pores, and both ends of the rotating shaft of the first horizontal rotating roller are connected to the support frame;

[0008] A partition is fixed in the threading trough, and the partition divides the threading trough into a plurality of threading trough units;

[0009] A left vertical rotating roller and a right vertical rotating roller are respectively provided on the left and right sides of the threading groove; the left vertical rotating roller is located on the outer side of the left side wall of the threading groove; the right vertical rotating roller is located 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 to the support frame.

[0010] Preferably, a partition is arranged in the horizontal direction in the wire threading groove, and two sides of the partition are fixedly connected to the side walls of the wire threading groove; the partition divides the inside of the wire threading groove into an upper wire threading groove and a lower wire threading groove.

[0011] Preferably, the partition is also provided with a plurality of strip-shaped pores; a second horizontal rotating roller is provided in the strip-shaped pores; the second horizontal rotating roller is arranged parallel to the first horizontal rotating roller; and both ends of the rotating shaft of the second horizontal rotating roller are connected to the side walls of the upper threading groove.

[0012] Preferably, the left vertical rotating roller includes an upper left vertical rotating roller located outside the upper threading groove and a lower left vertical rotating roller located outside the lower threading groove; the bottom end of the rotating shaft of the upper left vertical rotating roller is connected to 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 to the support frame.

[0013] Preferably, the right vertical rotating roller includes a right upper vertical rotating roller located outside the upper threading groove and a right lower vertical rotating roller located outside the lower threading groove; the bottom end of the rotating shaft of the right upper vertical rotating roller is connected to the top end of the rotating shaft of the right lower vertical rotating roller; the bottom end of the rotating shaft of the right lower vertical rotating roller is connected to the support frame.

[0014] Preferably, a cover plate is provided on the top of the wire threading trough; the cover plate can prevent dust and debris from falling into the wire threading trough and affecting the pipe laying.

[0015] Preferably, a pulley is provided at the bottom of the support frame to facilitate the overall movement of the threading device.

[0016] Based on a general inventive concept, the present invention also includes a process for producing a through-ground wire using the above-mentioned threading device, and the process specifically includes the following steps:

[0017] 1) Pipe laying: straighten the disc-shaped copper tube, and then introduce the straightened copper tube into any threading slot unit of the threading device; 2) Cable core threading: insert the cable core formed by copper strands into the copper tube that has been laid by using a winding device; 3) Drawing and forming: place the cable core and the copper tube in a drawing machine at the same time for drawing and forming; 4) During the drawing and forming process in step 3), the pipe laying operation described in step 1) is simultaneously performed in other threading slot units of the threading device.

[0018] Preferably, in the process of threading the cable core in step 2), the steel wire rope is first introduced into the copper tube; the end of the steel wire rope first passes through the copper tube and is connected to the copper stranded wire, and the steel wire rope is twisted by a winch to introduce the copper stranded wire into and pass through the copper tube.

[0019] The beneficial effects of the present invention are:

[0020] When any threading trough in the threading device of the present invention performs a drawing and forming operation after completing the laying of the copper tube and the threading of the cable core, other threading trough units can simultaneously perform the laying of the copper tube and the threading of the cable core, that is, the threading device of the present invention can simultaneously produce at least two through-ground wires. Compared with the existing threading troughs that can only produce one through-ground wire at the same time, and the laying of the copper tube, the threading of the cable core and the drawing production process can only be performed separately, the overall production efficiency of the present invention is more than doubled. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a threading device according to the present invention;

[0022] Figure 2 A schematic diagram of a through-ground wire production line composed of the threading device;

[0023] Figure 3 for Figure 2 Magnified view at A in the middle;

[0024] Figure 4 for Figure 2 Magnified view at B.

[0025] In the figure, 1. threading device, 2. first horizontal rotating roller, 3. partition, 4. upper threading groove, 5. lower threading groove, 6. second horizontal rotating roller, 7. upper left vertical rotating roller, 8. lower left vertical rotating roller, 9. upper right vertical rotating roller, 10. lower right vertical rotating roller, 11. left bracket, 12. right bracket, 13. cover plate, 14. top bracket, 15. pulley, 16. support frame, 20. copper tube unwinding machine, 21. pinch roller, 22. straightening machine, 30. winch, 31. copper stranded wire unwinding machine, 40. No. 1 drawing machine, 41. linear loop buffer device, 42. No. 2 drawing machine, 43. No. 3 drawing machine, 44. gantry winder, 46. pressing machine. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with specific embodiments. It should be noted that the terms "upper", "lower", "left", "right", "inner", "outer" and the like described in the embodiments are only used to illustrate the relative positional relationship of each structure, and are not used to limit the scope of the present invention. The change or adjustment of the relative relationship shall also be regarded as the scope of the present invention without substantially changing the technical content. Example

[0027] A threading device for through-ground wire production, such as Figure 1-3 As shown, the device includes a wire threading trough and a support frame 16 disposed at the bottom of the wire threading trough for supporting the wire threading trough.

[0028] In this example, the longitudinal section of the threading groove is a U-shaped structure. The bottom of the threading groove is provided with a plurality of strip-shaped pores 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 2 is provided in the strip-shaped pores, and both ends of the rotating shaft of the first horizontal rotating roller 2 are connected to the support frame 16 located at the bottom of the threading groove. In order to facilitate disassembly, a left bracket 11 and a right bracket 12 are welded to the left and right sides of the top of the support frame 16, respectively, and the left end of the rotating shaft of the first horizontal rotating roller 2 is detachably connected to the left bracket 11 by bolts; the right end of the rotating shaft of the first horizontal rotating roller 2 is detachably connected to the right bracket 12 by bolts.

[0029] A partition 3 is arranged in the horizontal direction in the threading groove, and the two sides of the partition 3 are integrally welded with the side wall of the threading groove. The partition 3 divides the inside of the threading groove into an upper threading groove 4 and a lower threading groove 5. The partition 3 is also provided with a plurality of strip-shaped pores; a second horizontal rotating roller 6 is arranged in the strip-shaped pores. The second horizontal rotating roller 6 is arranged parallel to the first horizontal rotating roller 2; the two ends of the rotating shaft of the second horizontal rotating roller 6 are fixedly connected with the side wall of the upper threading groove 4.

[0030] The above-mentioned first horizontal rotating roller 2 is a galvanized non-powered roller with a diameter of 50 mm and a length of 150 mm, and is arranged one every 3 meters at the bottom of the groove; the second horizontal rotating roller 6 is a galvanized non-powered roller with a diameter of 25 mm and a length of 135 mm, and is arranged one every 3 meters on the partition 3; by arranging horizontal rotating rollers, the friction of copper pipes on the partition 3 or the bottom of the wire threading groove can be reduced during pipe laying, wire blowing, and drawing production.

[0031] The left and right sides of the threading groove are respectively provided with a left vertical rotating roller and a right vertical rotating roller. The left vertical rotating roller includes an upper left vertical rotating roller 7 located outside the upper threading groove 4 and a lower left vertical rotating roller 8 located outside the lower threading groove 5; the bottom end of the rotating shaft of the upper left vertical rotating roller 7 is welded to 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 to the support frame 16;

[0032] The right vertical rotating roller includes a right upper vertical rotating roller 9 located outside the upper threading groove 4 and a right lower vertical rotating roller 10 located outside the lower threading groove 5; the bottom end of the rotating shaft of the right upper vertical rotating roller 9 is welded to the top end of the rotating shaft of the right lower vertical rotating roller 10; the bottom end of the rotating shaft of the right lower vertical rotating roller 10 is welded to the supporting frame 16;

[0033] The upper left vertical rotating roller 7, the lower left vertical rotating roller 8, the upper right vertical rotating roller 9 and the lower right vertical rotating roller 10 are all galvanized non-powered rollers with a diameter of 50 mm and a length of 80 mm. The ends of the rotating shafts of the upper left and lower left vertical rotating rollers and the upper right and lower right vertical rotating rollers are welded to form two sections of rollers that can rotate independently, thereby reducing the friction between the copper tube or wire rope and the side wall of the threading trough, thereby reducing the wear of the copper tube and the threading trough.

[0034] In order to prevent dust and debris from falling into the wire trough and affecting the pipe laying, a cover plate 13 is provided on the top of the upper wire trough 4; the cover plate 13 is fixedly connected to the top bracket 14 provided on the top of the upper wire trough 4 by self-tapping screws, and the top bracket 14 is fixed to the top of the upper wire trough 4 by bolts.

[0035] In this embodiment, the length of the threading groove is 6m or 9m. By moving a plurality of threading devices 1 to a position where they are connected end to end, a through-ground wire production line with a total length of 350m to 620m can be formed to produce through-ground wires of different lengths. Since the total length of the production line is relatively long, and subject to the space limitation in the production workshop 50, the production line usually needs to make a detour in the production workshop 50. In order to facilitate the adjustment of the position of the threading device 1, a pulley 15 can be provided at the bottom of the support frame 16, and the threading device 1 with the pulley 15 is provided at a turning point or near a passage in the production workshop 50.

[0036] The production of through-ground wires using the threading device in this embodiment specifically includes the following steps:

[0037] 1) Pipe laying: The disc-shaped copper pipe on the copper pipe unwinding machine 20 is sent to the straightening machine 22 through the pinch roller 21 for straightening operation. After straightening, the copper pipe is guided into the lower threading groove;

[0038] 2) Cable core threading: After the pipe laying is completed, the steel wire rope on the winch 30 is introduced into the copper tube; during the steel wire rope introduction process, a plastic guide head is first connected to the end of the steel wire rope, and air is blown into the copper tube using an air compressor; since the end of the plastic guide head is round and its diameter is slightly smaller than the diameter of the copper tube, when air is introduced into the copper tube, the plastic guide head moves forward under the action of the air, thereby driving the steel wire rope to move forward until it passes through the copper tube; then the plastic guide head at the end of the steel wire rope is removed, the end of the steel wire rope is connected to the copper stranded wire on the copper stranded wire unwinding machine 31, the winch 30 is rotated to retract the steel wire rope, and the copper stranded wire is introduced into and led out of the copper tube;

[0039] 3) Drawing and forming: The copper tube and the cable core that have been threaded with the cable core are placed in the head press 46 at the same time, and introduced into the drawing machine through the pinch roller 21 for drawing and forming; in this embodiment, the copper tube is sequentially drawn three times by the No. 1 drawing machine 40, the No. 2 drawing machine 42 and the No. 3 drawing machine 43; the No. 1 drawing machine is an 8T drawing machine, and the No. 2 and No. 3 drawing machines are 5T drawing machines. A linear loop buffer device 41 is provided between the No. 1 and No. 2 drawing machines, and between the No. 2 and No. 3 drawing machines; finally, the through ground wire formed after three drawing operations is wound into a coil by the gantry winder 44;

[0040] 4) During the process of drawing and forming the copper tube in step 3), new tube laying and cable core threading operations are simultaneously performed in the upper threading trough.

[0041] The production processes carried out in the upper and lower threading troughs can be interchanged, that is, when the drawing and forming operation is carried out in the upper threading trough, the pipe laying and cable core operation can be carried out in the lower threading trough at the same time.

[0042] In this embodiment, by setting the upper and lower threading grooves, a set of production equipment is used to simultaneously produce two through-ground wires, that is, the pipe laying, cable core threading process and the copper tube drawing and forming process are synchronized; in the existing production process, the pipe laying, cable threading process and the copper tube drawing and forming process cannot be carried out at the same time, that is, a set of production equipment can only produce one through-ground wire at the same time; and the copper tube drawing process is time-consuming, which limits the production efficiency of the through-ground wire. Compared with the existing production process, the through-ground wire production process of this embodiment doubles the production efficiency.

[0043] The above is only the best implementation mode of the present invention. In the above embodiment, the bottom and side wall of the threading groove are integrally stamped from 304 stainless steel plate; the cover plate and partition plate used are 3mm thick 304 stainless steel plate, and the material and thickness used can also be other.

[0044] In addition, in the above embodiment, a horizontal partition is provided in the wire threading trough, thereby dividing the wire threading trough into an upper wire threading trough and a lower wire threading trough; the partition can also be arranged in the vertical direction, thereby dividing the wire threading trough into a left wire threading trough and a right wire threading trough; the above implementation method can achieve the same technical effect as the above embodiment; any other adjustments that do not deviate from the design ideas and concepts of the present invention should also be regarded as the scope of the implementation of the present invention.

Claims

1. A threading device for through-ground wire production, characterized in that: The device comprises a wire threading trough and a support frame arranged at the bottom of the wire threading trough for supporting the wire threading trough; A plurality of strip-shaped pores are parallelly provided at the bottom of the threading groove, 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 provided in the strip-shaped pores, and both ends of the rotating shaft of the first horizontal rotating roller are connected to the support frame; The left and right sides of the threading slot are respectively provided with a left vertical rotating roller and a right vertical rotating roller; the left vertical rotating roller is located on the outer side of the left side wall of the threading slot; the right vertical rotating roller is located on the outer side of the right side wall of the threading slot; the bottom ends of the rotating shafts of the left and right vertical rotating rollers are connected to the support frame; A partition is arranged in the horizontal direction in the threading groove, and the two sides of the partition are fixedly connected to the side walls of the threading groove; the partition divides the inside of the threading groove into an upper threading groove and a lower threading groove; A cover plate is provided on the top of the wire threading groove.

2. The threading device according to claim 1, characterized in that: The partition is also provided with a plurality of strip-shaped pores; a second horizontal rotating roller is provided in the strip-shaped pores; the second horizontal rotating roller is arranged parallel to the first horizontal rotating roller; and both ends of the rotating shaft of the second horizontal rotating roller are connected to the side walls of the upper threading groove.

3. The threading device according to claim 1, characterized in that: The left vertical rotating roller includes an upper left vertical rotating roller located outside the upper threading groove and a lower left vertical rotating roller located outside the lower threading groove; the bottom end of the rotating shaft of the upper left vertical rotating roller is connected to 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 to the support frame.

4. The threading device according to claim 1, characterized in that: The right vertical rotating roller includes a right upper vertical rotating roller located outside the upper threading groove and a right lower vertical rotating roller located outside the lower threading groove; the bottom end of the rotating shaft of the right upper vertical rotating roller is connected to the top end of the rotating shaft of the right lower vertical rotating roller; the bottom end of the rotating shaft of the right lower vertical rotating roller is connected to the support frame.

5. The threading device according to claim 1, characterized in that: A pulley is arranged at the bottom of the supporting frame.

6. A process for producing through-ground wires using the threading device according to claim 1, characterized in that: The specific steps include: 1) Pipe laying: straighten the disc-shaped copper tube, and then introduce the straightened copper tube into any threading slot unit of the threading device; 2) Cable core threading: insert the cable core formed by copper strands into the copper tube that has been laid by using a winding device; 3) Drawing and forming: place the cable core and the copper tube in a drawing machine at the same time for drawing and forming; 4) During the drawing and forming process in step 3), the pipe laying operation described in step 1) is simultaneously performed in other threading slot units of the threading device.

7. The process according to claim 6, characterized in that: In the process of threading the cable core in step 2), the steel wire rope is first introduced into the copper tube; the end of the steel wire rope first passes through the copper tube and is connected to the copper stranded wire, and the steel wire rope is twisted by a winch to allow the copper stranded wire to be introduced into and passed through the copper tube.

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