A tubular stranding machine

Abstract

The present invention relates to a tubular stranding machine, comprising a cradle bracket, a tube, a guiding device and a wire pay-off drum, wherein the wire pay-off drum is installed in the cradle bracket, the cradle bracket is arranged in sequence in the tube, two wire pay-off drums are installed in one cradle bracket, the two wire pay-off drums are arranged adjacent to each other in the middle of the cradle bracket, and a guiding device is respectively arranged between the wire pay-off drum and the end of the cradle bracket. Due to the combination of the improvement of the layout of each component of the present invention and the improvement of the guiding device, the tube can be short in length, cost can be saved, the angle of the wire routing is small, and the phenomenon of wire collapse or wire pressing of the wire pay-off drum does not occur, thereby ensuring smooth wire output of the wire pay-off drum.

Description

Technical Field

[0001] The invention relates to the technical field of equipment for processing cables, in particular to a tubular stranding machine. Background Art

[0002] The tubular stranding machine is one of the important equipment for processing cables. It can twist multiple conductors into one strand to meet the needs of use. The traditional tubular stranding machine is large in size, heavy in weight, and has a long tube. Taking the processing of six-plus-one cable cores as an example, usually a cradle bracket is installed with a wire drum. The tube of the equipment must be composed of 6 cradles arranged in sequence and connected. The total length of the tube is 7.2 meters. Due to the weight of the tube itself and the weight of the internal wire drum, the middle section of the tube will bend. In order to ensure the supporting force, a support wheel or bearing frame must be installed in the middle of the tube. The support wheel or bearing frame is expensive, which increases the cost of the entire equipment.

[0003] In addition, when the wire is discharged from the pay-off drum of the traditional tubular stranding machine, when the wire is located on both sides of the pay-off drum, the wire has a large inclination angle when it is discharged, and the friction is large, which is easy to squeeze the wire layer, causing wire collapse or wire compression, affecting the efficiency of the wire discharge. In order to solve this technical problem, the Chinese patent with publication number: 105047326 sets a bracket on the rear side of the pay-off drum and installs a guide roller on the upper part of the bracket. When the wire is discharged, the wire first passes through the guide roller on the rear side and then enters the wire outlet hole. This structure requires the guide roller to be set higher than the pay-off drum to achieve this, which will increase the length of the cradle and the space of the entire pay-off device. Figure 3 Although part a solves the problem of wire collapse or wire pressing, it cannot solve the technical problem of large tube length. Summary of the invention

[0004] In order to overcome the above defects, the present invention provides a tubular stranding machine, which can not only solve the problem of wire collapse or wire compression, but also reduce the length of the tube, save the supporting wheel or bearing frame, and thus reduce the equipment cost.

[0005] The technical scheme adopted by the present invention is: a tubular stranding machine, comprising a cradle bracket, a tube, a guiding device and a pay-off drum, the pay-off drum is installed in the cradle bracket, the cradle bracket is arranged in sequence in the tube, the cradle bracket is movably connected to the tube through a mounting frame with bearings at both ends, and the tube rotates under the drive of a motor, and is characterized in that: two pay-off drums are installed in one cradle bracket, the two pay-off drums are arranged adjacent to each other in the middle of the cradle bracket, a guiding device is respectively arranged between the pay-off drum and the end of the cradle bracket, and a fixing frame is vertically arranged on the side near the two ends of the cradle bracket; the guiding device comprises a guiding roller, a rotating roller and a pulley, the guiding roller and the rotating roller are respectively arranged at the upper and lower parts of one side of the pay-off drum, the pulley is arranged on the mounting frame and is located on the outer side of the bearing of the mounting frame, the length of the guiding roller corresponds to the length of the pay-off drum, the length of the rotating roller is shorter than that of the guiding roller, the guiding roller and the rotating roller are installed on the fixing frame through an axis, and the wire on the pay-off drum passes through the inner hole of the bearing after passing through the guiding roller, the rotating roller and the pulley in sequence.

[0006] As a preferred structure of the present invention, the length of the rotating roller is half the length of the guiding roller.

[0007] Furthermore, three cradle brackets are arranged in the tube.

[0008] The present invention improves the arrangement of the components in the tube and changes the structure of the guide device. Two pay-off drums are arranged in a cradle bracket and the guide device is installed outside the two pay-off drums, so that the space outside the pay-off drums is fully utilized, the spacing between the pay-off drums is shortened, and the length of the cradle bracket is reduced, so that the layout structure of the components in the entire tube is compact and the length of the tube can be shortened by nearly half. Therefore, the supporting wheel or bearing frame used to support the tube in the traditional equipment is omitted, and the equipment cost is reduced.

[0009] The guide device in the present invention improves the original long horizontal routing of the wire into a very short horizontal plus a long vertical routing. The function of the guide roller is to extend the turning point of the released wire outward, so that the angle of the connection between the turning point and the threading hole becomes smaller, and then the wire is rotated around the outer circle of the rotating roller and the pulley. The angle of the released wire will become smaller after several turns. Therefore, although the distance between the pay-off drum and the threading hole is short, the angle of the wire routing remains small. Therefore, the improved guide device can meet the condition that the length of the tube is short, the angle of the wire routing is small, and the phenomenon of wire collapse or wire pressing on the pay-off drum does not occur, ensuring smooth wire discharge from the pay-off drum;

[0010] Since the tube length of the present invention is greatly shortened and combined with the improved guiding device, not only the supporting wheel or the bearing frame is omitted to reduce the cost, but also the following can be achieved: the motor for driving the tube to rotate uses a low-power one, which saves electricity and reduces consumption; since the weight of the tube is reduced, the rotation speed of the tube can be increased from the original 500 rpm to 680 rpm, and the finished product outlet speed is increased from 120 m / min to 160 m / min, thereby increasing the output. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the present invention.

[0012] Figure 2 for Figure 1 Enlarged view of part A.

[0013] Figure 3 It is a schematic diagram comparing the wiring in the prior art and the wiring in the present invention. DETAILED DESCRIPTION

[0014] The present invention will now be further described with reference to the accompanying drawings. Figure 1 An embodiment of the present invention includes a cradle bracket 1, a tube 2, a guiding device, a wire pay-off drum 3 and a guiding device, etc. The wire pay-off drum 3 is installed in the cradle bracket 1, and the cradle bracket 1 is arranged in the tube 2 in sequence. The cradle bracket 1 is movably connected to the tube 2 through a mounting frame 4 with bearings at both ends. The tube 2 rotates around the cradle bracket 1 and the wire pay-off drum 3 driven by a motor. An opening is opened on the tube 2 for convenient installation and removal of the wire pay-off drum 3. Two wire pay-off drums 3 are installed in one cradle bracket 1. The two wire pay-off drums 3 are arranged adjacent to each other in the middle of the cradle bracket 1, and the axis of the wire pay-off drum 3 is perpendicular to the axis of the tube 2. A guiding device is provided between each end of the wire pay-off drum 3 and the cradle bracket 1, and one guiding device is provided for each wire pay-off drum 3. Fixed frames 5 are vertically provided on the sides close to the two ends of the cradle bracket 1. The fixed frames 5 can be two long strips of plates vertically installed on both sides of the cradle bracket 1, see Figure 2 It can also be a vertically arranged rectangular frame, whose two vertical plates are fixedly connected to the two sides of the cradle bracket 1, that is, the fixing frame 5 and the cradle bracket 1 are vertical.

[0015] The guiding device comprises a guiding roller 11, a rotating roller 12 and a pulley 13. The guiding roller 11 and the rotating roller 12 are respectively arranged at the upper and lower parts of one side of the pay-off drum 3. The pulley 13 is arranged on the mounting frame 4 and is located outside the bearing of the mounting frame 4. The rotating roller 12 and the guiding roller 11 are parallel to the axis of the pay-off drum 3. From the cross section of the tube 2, the pulley 13, the rotating roller 12 and the guiding roller 11 are arranged vertically and centrally relative to the pay-off drum 3. Figure 3b part in the drawing. The length of the guide roller 11 corresponds to the length of the pay-off drum 3, and the length of the rotating roller 12 is shorter than the guide roller 11. In this embodiment, three cradle brackets 1 are arranged in the tube 2, and the cradle brackets 1 are arranged horizontally in sequence. The length of the rotating roller 12 is half the length of the guide roller 11. The guide roller 11 and the rotating roller 12 are installed on the fixed frame 5 through the shaft, and the wire on the pay-off drum 3 passes through the inner hole of the bearing after passing through the guide roller 11, the rotating roller 12 and the pulley 13 in sequence. After passing through the inner hole of the bearing, the wire is guided to a position close to the wall of the tube 2 through the guide device, and then extends to the front end of the tube 2. Compared with the traditional six cradle bracket 1 structure, the structure of the three cradle brackets 1 reduces the support points of the entire tube 2, reduces the pressure on the tube 2, and the force point is not in the middle part of the tube 2. The middle part does not sag, the friction is small, and the rotation of the tube 2 is not affected, and the rotation speed of the tube 2 can be increased.

[0016] The guide device includes a guide wheel 21 and a wire wheel 22. The guide wheel 21 is installed on the mounting frame 4. The rear side of the bearing, that is, the side opposite to the pulley 13, and the wire wheel 22 is installed on the wall of the tube 2. In this embodiment, the guide device arranged between two adjacent cradle frames is arranged opposite to each other up and down, that is, arranged in a mirror image up and down. This arrangement can maximize the use of space and shorten the length distance, thereby providing conditions for shortening the length of the tube 2. The wire passing through the bearing hole first passes through the guide wheel 21 and then around the wire wheel 22 to extend to the front end of the tube 2, and then the multi-strand wire is twisted.

[0017] The present invention improves the arrangement of the components in the tube 2 and changes the structure of the guiding device. Two wire-paying drums 3 are arranged in a cradle bracket 1, and the guiding device is installed on the outside of the two wire-paying drums 3, so that the space outside the wire-paying drums 3 is fully utilized, the distance between the wire-paying drums 3 is shortened, and the length of the cradle bracket 1 is reduced, so that the component layout structure in the entire tube 2 is compact, and the length of the tube 2 can be shortened by nearly half. The original tube 2 is 7.2 meters long, and the tube 2 of the present invention can be realized as 3.9 meters, thereby eliminating the support wheel or bearing frame used to support the tube 2 in traditional equipment, thereby reducing the equipment cost. In addition, since the length of the tube 2 of the present invention is greatly shortened and combined with the improved guiding device, it can also be achieved that: the motor that drives the tube 2 to rotate uses a low-power motor. Originally, a 22KW motor with a main power was required. After the improvement, the present invention only needs to use a 7.5KW motor to meet general work needs, saving electricity and reducing consumption; due to the reduction in weight of the tube 2, the rotation speed of the tube 2 can be increased from the original 500 rpm to 680 rpm, and the finished product outlet speed is increased from 120 m / min to 160 m / min, thereby increasing production.

[0018] Since the present invention improves the guiding device, the original long horizontal line of the wire is improved into a very short horizontal plus a long vertical line. The function of the guide roller 11 is to extend the turning point of the released wire outward, so that the angle of the line between the turning point and the threading hole becomes smaller. In another place, the wire is then turned around the outer circle of the rotating roller 12 and the pulley 13. In this way, the angle of the released wire will become smaller after several turns. Figure 3 , part a is the wiring diagram of the prior art, and part b is the wiring diagram of the present invention. It can be seen from the comparison diagram that the wiring angles of the prior art and the present application are similar, but the length distance L required for the wiring is quite different. The length distance L required for the wiring of the present application is shorter and larger than the distance L of the prior art, so the length of the cradle bracket 1 can be greatly shortened, thereby greatly reducing the length of the entire tube 2. In other words, compared with the prior art, although the distance between the wire tray 3 and the threading hole is shorter in the present application, the wire wiring angle can maintain the original smaller angle.

[0019] Therefore, due to the combination of the improvement in the layout of the components of the present application and the improvement in the guiding device, it is possible to simultaneously meet the requirements of a shorter tube length, cost savings, a smaller angle for the wire routing, and no collapse or compression of the wire on the pay-off reel, thereby ensuring smooth wire output from the pay-off reel.

Claims

1. A tube stranding machine, comprising a cradle support, a tube barrel, a guiding device and a pay-off reel. The pay-off reel is installed inside the cradle support, and the cradle supports are arranged in sequence inside the tube barrel. The cradle support is movably connected to the tube barrel through a mounting frame with bearings at both ends. The tube barrel rotates driven by a motor. It is characterized in that: Two pay-off reels are installed inside one cradle support. The two pay-off reels are arranged adjacent to each other in the middle of the cradle support. The axes of the two pay-off reels are parallel. Guiding devices are respectively arranged between the pay-off reel and the end of the cradle support. Fixed frames are vertically arranged on the sides near the two ends of the cradle support. The guiding device includes a guiding roller, a rotating roller and a pulley. The guiding roller and the rotating roller are respectively arranged at the upper and lower parts on one side of the pay-off reel. The pulley is arranged on the mounting frame and outside the bearing of the mounting frame. The length of the guiding roller corresponds to the length of the pay-off reel. The length of the rotating roller is shorter than that of the guiding roller. The guiding roller and the rotating roller are installed on the fixed frame through shafts. The wire on the pay-off reel passes through the inner hole of the bearing after passing through the guiding roller, the rotating roller and the pulley in sequence. The tube stranding machine further includes a guiding device. The guiding device includes a guiding wheel and a wire guiding wheel. The guiding wheel is installed on the mounting frame, at the rear side of the bearing, that is, the side opposite to the pulley. The wire guiding wheel is installed on the wall of the tube barrel. The guiding devices arranged between adjacent two cradle supports are arranged vertically opposite to each other.

2. The tube stranding machine according to claim 1, It is characterized in that: The length of the rotating roller is half of the length of the guiding roller.

3. The tube stranding machine according to claim 1 or 2, It is characterized in that: Three cradle supports are arranged inside the tube barrel.

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