Patent Grant
10533280
This application claims priority to Chinese Patent Application No. 201710392497.X, filed May 27, 2017, entitled Special-shaped Cable Core Forming Mechanism, which is incorporated herein by reference in its entirety.
The present invention relates to the manufacturing field of special-shaped cable cores, in particular to a special-shaped cable core forming mechanism.
With the advancement of the processing technology for wires and cables, overhead wires and power cable conductors begin to develop toward the molded stranded wire structure. A molded stranded conductor is characterized by small outer diameter and smooth appearance. Application of molded wire stranding in the overhead wires has the characteristics of slow icing, reduced wind load and improved resistance to high-voltage corona.
The application of molded wire stranding in the power cable conductor is characterized by reduced cable breakdown rate, saved insulation and sheathing materials, increased fill factor of conductor as well as good radial and longitudinal waterproof characteristics. The cables widely applying the molded wire structure comprise aluminum alloy cable, medium and high voltage submarine cables and overhead insulated cable.
The conventional multi-core stranded cable is that the stranding direction of each single wire layer is opposite to that of the previous layer, and the outermost layer is generally stranded leftward. As the conventional single core is cylindrical, positive and negative alternation can increase the strength of cable cores. Meanwhile, the positive and negative alternation is still used in the process of stranding special-shaped cable cores in the prior art. If only one layer of cores is stranded, there is no difference from the conventional production process, and the time consumption is almost the same. It is only required to change the wire-drawing mold into the mold corresponding to the special-shaped wire. However, if there are two or more layers (generally, special-shaped wires have single layer, double layers or three layers), when the original mechanism and the raw material production method are still used for producing two or three layers of stranded special-shaped cable cores, two stranding steps are required to realize such purpose, which increases the processing time.
The present invention is provided for the problem that the existing cable core forming device can be only used to strand a layer of single wires at one time, one-time stranding is impossible when the wires are in multi-layer structure, and the stranded cable cores are not tight enough. In particular to a special-shaped cable core, a mechanism for stranding a plurality of cable cores at one time is provided, and the pre-stranding design enables the cable cores to strand layer by layer, which increases the tightness of the cable cores. Meanwhile, when the special-shaped cable cores are guided, the cross section is not easy to deform, thereby further ensuring tightness of the cable cores. The specific technical solution is as follows:
A special-shaped cable core forming mechanism comprises a guide assembly, a first pre-stranding assembly and a main stranding mold which are arranged successively at a same horizontal axis;
The utility model is realized as follows: a special-shaped single wire passes through the guide assembly and is guided by the guide assembly into the first pre-stranding assembly for preliminary stranding, and then passes through the main stranding mold for stranding on the last layer and the final tightening of the whole cross section. When the special-shaped single wire passes through the guide assembly, the special-shaped single wire passes through the first tampered support along the horizontal axis, then passes through the stranded through hole layer and the first strand cylinder; and then the first tapered support rotates with the guide assembly, and the rotating connector rotates also. However, the first strand cylinder does not rotate due to the structure of the first annular hollow. When the special-shaped single wire passes through the stranded through hole layer, the wire is preliminarily stranded on the support conductor. When the special-shaped single wire passes through the first strand cylinder, the wire is further tightened and stranded. The special-shaped single wire is stranded on the support conductor to form a layer of stranded cable cores. Two stranding steps increase the tightness of the stranded cable cores.
As further defined, the special-shaped cable core forming mechanism also comprises a second pre-stranding assembly, wherein the second pre-stranding assembly comprises a second tapered support, a second rotating connector, a second pull rod and a second strand cylinder; the horizontal axis passes through the second tapered support, the second rotating connector and the second strand cylinder successively, and the second pull rod is connected with the second rotating connector and the second strand cylinder;
A layer of stranded cores pass through the second strand cylinder, so that two layers of special-shaped single wires are stranded on a layer of stranded cable cores; the two layers of special-shaped single wires are guided by the guide assembly to pass through the gap between the first tapered support and the second tapered support, then pass through the gap between the first strand cylinder and the second strand cylinder, and finally enter the second strand cylinder to joint with the orderly stranded cable cores, thus forming two layers of stranded cable cores.
As further defined, an inner hole of the first strand cylinder is tapered, a large-diameter end of the inner hole of the first strand cylinder is an incoming end, and a small-diameter end of the inner hole of the first strand cylinder is an outgoing end.
As further defined, an inner hole of the second strand cylinder is tapered, a large-diameter end of the inner hole of the second strand cylinder is an incoming end, and a small-diameter end of the inner hole of the second strand cylinder is an outgoing end.
The tapered hole enables the stranded special-shaped single wire to be extruded gradually.
As further defined, guide rollers are arranged on the small-diameter end of the inner hole of the first tapered support, and the number of the guide rollers is consistent with that of single wires on the same strand layer.
As further defined, guide rollers are arranged on the small-diameter end of the inner hole of the second tapered support, and the number of the guide rollers is consistent with that of single wires on the same strand layer.
The single wire is further guided, thus avoiding the single wire from being scratched.
As further defined, the guide assembly comprises a drum and a turntable; both ends of the drum are communicated, and the turntable is fixedly sheathed on the drum; both the first tapered support and the second tapered support are fixed to the turntable, and receiving through holes are arranged on the turntable in a manner of annular array; the receiving through holes pass through two end faces of the turntable; the number of the receiving through holes on the same annular array is consistent with that of the single wires on the same strand layer, and the number of the annular arrays of the receiving through holes is consistent with that of stranded cable core layers; and
The drum drives the turntable to rotate synchronously, and each of the single wires passes through the receiving through holes, and is guided by the guide roller to rotate with the turntable. An outer circumference of the guide roller matches with an outer circumference of the single wire, so that the cross section shape of the special-shaped wire will not deform due to stress concentration when the guide roller guides the special-shaped single wire, thus avoiding the insufficiently tight stranding caused by the deformation during guide.
As further defined, the number of the turntables is three, and the three turntables are strung by the drum into one; the turntable comprises a first turntable, a second turntable and a third turntable in order; both the first tapered support and the second tapered support are fixed to the third turntable; each of the single wires passes through the first turntable, the second turntable, and the third turntable in order, and each of the single wires offsets toward the drum at the second turntable.
The single wire passes through the first turntable, second turntable and third turntable in order.
As further defined, a wire entry of the stranded through hole layer is flared.
The single wire is protected from damage, so that the single wire can be pressed and stranded gradually.
As further defined, the first rotating connector and the first tapered support are fixedly connected in a detachable manner, and the second rotating connector and the second tapered support are fixedly connected in a detachable manner.
At the time of installation, the first pull rod is first inserted into the first rotating connector to be seized by the first seizing ball, and then the other end is fixedly connected with the first strand cylinder, and the fixed connection can be welding or detachable fixed connection with screw fit. The installation of the second pull rod is the same.
The beneficial effects of the present invention are as follows: a layer of wires are preliminarily stranded by a layer of strand through holes, and the first strand cylinder is used for the second pressing and stranding, so that the structure is more compact. The next layer of special-shaped single wires are stranded through the second pre-stranding assembly, and then the last layer of wires are stranded through the main stranding mold, thus realizing the stranding of a plurality of layers at the same time and compact structure. The outer circumference of the guide roller is redesigned to match with that of the special-shaped single wire, which avoids the reduced quality of stranded cable cores due to the deformation of the special-shaped single wire as caused by stress concentration during guide. The key point of the present invention is the design of the rotating connector, in particular to that the first rotating connector is bowl-shaped and is provided with a layer of strand through holes together with a structure in which the first pull rod is in fit with the rotating connector and a structure in which the second pull rod is in fit with the rotating connector.
The preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention will be more readily understood by those skilled in the art, thereby clearly defining the protection scope of the present invention.
As shown in
As shown in
The present utility model is realized as follows: a special-shaped single wire passes through the guide assembly 1 and is guided by the guide assembly 1 into the first pre-stranding assembly 2 for preliminary stranding, and then passes through the main stranding mold 3 for stranding on the last layer and the final tightening of the whole cross section. When the special-shaped single wire passes through the guide assembly 1, the special-shaped single wire passes through the first tampered support 21 along the horizontal axis, then passes through the stranded through hole layer 221 and the first strand cylinder 24; and then the first tapered support 21 rotates with the guide assembly 1, and the rotating connector rotates also. However, the first strand cylinder 24 does not rotate due to the structure of the first annular hollow 223. When the special-shaped single wire passes through the stranded through hole layer 221, the wire is preliminarily stranded on the support conductor 51. When the special-shaped single wire passes through the first strand cylinder 24, the wire is further tightened and stranded. The special-shaped single wire is stranded on the support conductor 51 to form a layer of stranded cable cores. Two stranding steps increase the tightness of the stranded cable cores.
As shown in
As shown in
As shown in
The tapered hole enables the stranded special-shaped single wire to be extruded gradually.
As shown in
As shown in
A layer of stranded cores pass through a second strand cylinder 44, so that two layers of special-shaped single wires are stranded on a layer of stranded cable cores; the two layers of special-shaped single wires are guided by the guide assembly 1 to pass through the gap between the first tapered support 21 and the second tapered support 41, then pass through the gap between the first strand cylinder 24 and the second strand cylinder 44, and finally enter the second strand cylinder 44 to join with the orderly stranded cable cores, thus forming two layers of stranded cable cores.
As shown in
As shown in
The single wire is further guided, thus avoiding the single wire from being scratched.
As shown in
As shown in
The drum 11 drives the turntable 12 to rotate synchronously, and each of the single wires passes through the receiving through holes 121, and is guided by the guide roller 211 to rotate with the turntable 12. An outer circumference of the guide roller 211 matches with an outer circumference of the single wire, so that the cross section shape of the special-shaped wire will not deform due to stress concentration when the guide roller 211 guides the special-shaped single wire, thus avoiding the insufficiently tight stranding caused by the deformation during guide.
As shown in
The single wire passes through the first turntable 121, second turntable 122 and third turntable 123 in order.
As shown in
The single wire is protected from damage, so that the single wire can be pressed and stranded gradually
| Number | Date | Country | Kind |
|---|---|---|---|
| 2017 1 0392497 | May 2017 | CN | national |
| Number | Name | Date | Kind |
|---|---|---|---|
| 2124864 | Weller | Jul 1938 | A |
| 2277134 | Nelson | Mar 1942 | A |
| 3789596 | Richley | Feb 1974 | A |
| 20050015978 | Andersen | Jan 2005 | A1 |
| 20120291414 | Mackey | Nov 2012 | A1 |
| 20180340295 | Zeng | Nov 2018 | A1 |
| Number | Date | Country |
|---|---|---|
| 699485 | Nov 1940 | DE |
| Number | Date | Country | |
|---|---|---|---|
| 20180340295 A1 | Nov 2018 | US |
