CN115312269A

CN115312269A - Intermittent stranding process

Info

Publication number: CN115312269A
Application number: CN202211142958.5A
Authority: CN
Inventors: 徐升
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-09-20
Filing date: 2022-09-20
Publication date: 2022-11-08

Abstract

The invention relates to a stranding process of a plurality of strands of single wires in a cable, in particular to an intermittent stranding process, which is characterized in that a stranding device is arranged between a front doubling die and a rear doubling die, a plurality of strands of wires with set lengths are drawn between the front doubling die and the rear doubling die each time for static fixation, SZ stranding is carried out through the stranding device in a static fixation state, and the next section of wire is drawn after stranding until the stranding of all the wires is completed. The invention has the advantages that: replace dynamic, continuation system with static, intermittent type nature system of twisting, broken through the rotatory traditional handicraft of hank cage or pay-off that need utilize heavy weight among the prior art, simplified structure and operation, only need less equipment inertia, improved production safety, promoted pay-off's wire storage volume, provide longer transposition length demand, very big saving equipment cost and power consumption cost, effective power and energy saving.

Description

Intermittent stranding process

Technical Field

The invention relates to a stranding process of a plurality of strands of single wires in a cable, in particular to an intermittent stranding process.

Background

In the prior art, stranding of multiple strands of wires (or cable cores wrapped with insulating layers, or single wires of conductors without wrapping) is generally performed by using a tube stranding machine, a frame stranding machine, a cage stranding machine, a disc stranding machine and other large stranding cage equipment, wherein the tube stranding machine, the frame stranding machine and the cage stranding machine are formed by sequentially arranging a plurality of pay-off reels as single wires on a stranding cage, paying off the multiple strands of single wires along with rotation of the pay-off reels and rotation of the stranding cage, for example, referring to fig. 1 of a process structure diagram of stranding of the cage stranding machine, the cage stranding machine comprises a stranding machine support 21 and a stranding machine rotating shaft 22, a plurality of pay-off reels 1 are mounted on the stranding machine support 21, the wires 2 on each pay-off reel 1 rotate along with the pay-off reels and are spread along the direction of the twisting machine rotating shaft 22, after combination, the stranded cable cores 13 are stranded along the same direction, the stranded cable cores are conveyed to a lapping machine 7 through a stranding die 6 to be wound, and finally, and take-up is sequentially performed through a traction machine 12 and a take-up machine 14. The twist machine twists by rotating the whole take-up device, and the weight of the twist machine can reach dozens of tons, so the rotation speed is very slow.

Therefore, the stranded conductor is driven to be unidirectionally twisted based on the rotation of the stranding cage with the pay-off reel so as to complete the stranding process, and the stranding cage and the pay-off reel need to be continuously and rotationally matched in the whole stranding process to form continuous and dynamic transmission, twisting and take-up. However, this continuous stranding process has the following disadvantages: firstly, the stranding cage serving as stranding equipment is large-sized and heavy-duty equipment and is complex in structure, inconvenient to operate and tedious to install, and secondly, the large stranding cage and the pay-off reel can generate large moment of inertia during continuous rotation, so that certain safety risk exists, the rotation speed is greatly limited, and particularly, the production efficiency is low due to the fact that the stranding cage is a disc stranding machine; thirdly, pay-off reels arranged on the stranding cage are limited by the installation of the stranding cage and the rotational inertia, and the storage amount of the wires on each pay-off reel is also limited, so that the stranding length is also limited.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides the intermittent stranding process which is simple in structure, convenient to operate, capable of reducing safety risk and avoiding limitation of the storage capacity and the stranding length of a pay-off device.

The invention is realized by the following ways:

the utility model provides an intermittent type formula stranding technology which the main points lie in, includes pay-off, tension cable holder, preceding doubling die, transposition device, back doubling die, compression device and the receipts line draw gear that arranges in proper order, and concrete step is as follows:

1) The paying-off devices are multiple and are respectively placed on the ground or a fixed platform, the twisting device comprises a hinging chuck, and a clamping opening is formed in the hinging chuck;

2) Drawing a plurality of strands of wires with set length from the pay-off device, wherein the plurality of strands of wires sequentially pass through a tension wire storage frame and a front doubling die, are bundled by the front doubling die, then pass through a clamping opening loosened by a stranding chuck, and then sequentially pass through a rear doubling die and a pressing device to be led to a take-up traction device; at the moment, two ends of the multi-strand wire with the set length are an A end and a B end which respectively correspond to the binding points of the front doubling die and the rear doubling die to the wire;

3) Starting a twisting chuck to clamp a clamping point on the multi-strand wire with the set length, and then rotating the twisting chuck around the clamping point to drive the multi-strand wire with the set length to be twisted until a set length section is twisted, wherein the multi-strand wire with the set length is twisted into a twisted conductor;

4) After stranding, stopping rotating the stranding chuck, starting the take-up traction device, and winding the stranded conductor onto a wire coil of the take-up traction device;

5) When the stranded conductor is wound, pulling out a next section of multi-strand wire with a set length from the pay-off device under the traction of the take-up traction device, and enabling an A end of the previous section of multi-strand wire with the set length to be pulled and fixed on the rear doubling die to become a B end of the next section of multi-strand wire with the set length;

6) And repeating the steps 3) -5) until the required twisting length is finished.

The tension wire storage frame is used for straightening the wires and keeping the wires in a tension state, and compensates the length difference of the wires in the stranding process, so that the condition that the wires are too thin and do not meet the standard requirement due to over-stretching is avoided, and the subsequent stranding processing is facilitated. Because the stranding device is located between the front doubling die and the rear doubling die, the stranded conductor is formed into two strands with opposite twisting directions, namely SZ strands, which are bounded by the clamping point. Therefore, the twisting work of all the wires is finished by twisting with a set length through repeated and intermittent operations of traction, small-segment twisting and wire taking-up, the wires of each segment are twisted in a static state, the twisting speed is high, the twisting work can be finished only by adopting a portable twisting device without adopting large and heavy equipment, the structure of twisting equipment is greatly simplified, the operation is more convenient, a wire releasing device or wire taking-up device does not need to rotate together with the twisting device, only static placement and wire outgoing as required are needed, and therefore, the problem of large rotational inertia is avoided, the safety risk is effectively reduced, the wire storage amount of the wire releasing device is not limited by the rotational inertia any more, and longer wire storage amount can be provided to meet the requirement of longer twisting length; in addition, because large and heavy equipment has high cost and large energy consumption, the invention can greatly save the equipment cost and the energy consumption cost and effectively save power energy.

The invention may further be embodied as:

the twisting device also comprises a circular ring-shaped bracket, one end of the twisting chuck is arranged on the circular ring-shaped bracket, and the other end of the twisting chuck is a clamping opening; the stranded chucks are at least two groups, the circular ring-shaped support and the motor synchronously rotate through the synchronous belt, and the lead penetrates through the inner ring space of the circular ring-shaped support.

The twisting chuck can be designed as follows:

one is that: each twisting chuck is connected to the driving device, and after the driving device is started, the plurality of twisting chucks move towards the central axis direction of the circular ring-shaped support until the wire is clamped.

The twisting chucks of the scheme are all movable chucks, namely each chuck can move towards the central point of the wire under the action of the driving device and clamp the wire.

The other is as follows: the twisting chucks are divided into two groups, one group is a dynamic pressure wheel chuck, and the other group is a static pressure wheel chuck; the static pressure wheel chuck is fixedly arranged on the supporting rod, the clamping point of the static pressure wheel chuck is positioned at the central position of the circular ring-shaped bracket, the supporting rod is fixed on one side of the circular ring-shaped bracket on the circular ring surface, the other symmetrical side of the circular ring surface is provided with a movable wheel carrier, the movable wheel carrier is a pair of flat rods parallel to the supporting rod, and the flat rods are perpendicular to the flat rods and penetrate through holes arranged on the flat rods; the movable pinch roller chuck is arranged in the middle of the movable wheel frame, two sides of the movable wheel frame are connected with the driving device fixed on the annular surface of the circular bracket, and the flat rod can move up and down along with the guide of the polished rod under the action of the driving device, so that the movable pinch roller chuck can be driven to approach the static pinch roller chuck until the movable pinch roller chuck and the static pinch roller chuck clamp a lead.

The mode only needs one side to drive the other side, so that more moving parts are avoided, the driving structure is simplified, and clamping can be more accurate.

The driving device is either a cylinder driving device or a hydraulic driving device.

Since the twisting collet of the present invention drives a power element without much power, a cylinder driving device may be preferred.

The stranding device is disposed at an intermediate position between the front and rear doubling dies.

In this case, the twisted conductor will be formed by two twisted wires with opposite twisting directions, i.e. two-way twisting, which is different from the conventional one-way twisting structure, but the two-way twisting also meets the above requirement because the twisting is to make the multi-strand wires to be connected in the same length whether in a rolled state or a laid state.

The stranding devices are provided with a plurality of groups which are equidistantly distributed between A, B ends, each group of stranding devices correspondingly has a clamping point for a multi-strand wire with a set length, and the stranding directions of two adjacent stranding devices are opposite.

Therefore, a plurality of twisting points can be arranged at a long distance as far as possible, and the twisting section between two adjacent twisting devices is equivalent to twisting by two twisting devices, so that the set length of each twisting is increased, the twisting efficiency is improved, the twisting compactness is increased, and the twisting pitch is more balanced.

It should be noted that, when the end a of the previous hinge is regarded as the end B of the subsequent hinge, it is preferable that the two clamping points are completely corresponding without deviation, however, the process cannot be sufficiently ensured in actual application in a factory. As a product, there may be some error in the clamping point, but the smaller the error, the better. To what extent the tolerance level should be controlled, the skilled person can easily carry out the corresponding implementation on the basis of the production site.

The twisting chuck stops rotating, and when the twisting chuck is still in a clamping state of holding the clamping point, the front winding and binding device and the rear winding and binding device are started to tighten stranded multi-strand wires on two sides of the clamping point, and then the stranded multi-strand wires are compressed and taken up.

Due to the fact that the stranded conductor can be untwisted due to pulling of traction, the arrangement of the front and rear winding and binding devices can effectively prevent the stranded cable core from loosening and untwisting. The conductor comprises a conductor single wire and a cable core, the conductor single wire can generate a proper amount of plastic deformation when being twisted in a rotating mode, and the conductor single wire cannot rebound or loosen easily, so that the conductor single wire can be bound and tightened without adopting a front and back winding and binding device in the twisting process; and because the cable core is wrapped in the insulating adhesive layer, the surface friction of the insulating adhesive layer is insufficient during stranding, so that the cable is easy to rebound, loosen and untwist, and a front winding device and a rear winding device are preferably adopted for binding and tightening.

Compared with the prior art, the technical scheme of the invention has the following beneficial technical effects: through the repeated and intermittent operation of traction, small-segment twisting and take-up, the dynamic and continuous twisting is replaced by the static and intermittent twisting, the traditional process that a heavy twisting cage or a pay-off device needs to be utilized to rotate in the prior art is broken through, the structure and the operation are simplified, only small equipment rotational inertia is needed, the production safety is improved, the wire storage capacity of the pay-off device is improved, the longer twisting length requirement is provided, the equipment cost and the energy consumption cost are greatly saved, and the power energy is effectively saved.

Drawings

FIG. 1 is a schematic structural diagram of a stranding process of a drum stranding machine according to the background art of the present invention;

FIG. 2 is a schematic structural view of an intermittent stranding process according to the present invention;

fig. 3 is a schematic structural diagram of a twisting device according to an embodiment of the present invention.

Reference numerals: 1. a pay-off device; 2. a single conductor wire or cable core; 3. a filling rope (strip) wire storage rack; 4. a filling rope (strip); 5. a tension wire storage rack; 6. front doubling dies; 7. a front binding wrapping head; 8. a clamping twister; 9. a rear binding tape wrapping head; 10. a back doubling die; 11. rolling; 12. a crawler-type tractor; 13. cabling back cable cores; 14. provided is a wire rewinding machine.

81. A motor; 82. a synchronous belt; 83. a frame 84, a rotary air bag; 85. a circular bracket; 86. a polish rod; 87. a movable wheel carrier; 88. a cylinder; 89. a dynamic pressure wheel chuck; 810. a hydrostatic wheel cartridge; 811. a support rod.

Detailed Description

The invention is described in more detail below with reference to the accompanying drawings.

The intermittent stranding process of the invention involves the following: the device comprises a pay-off device 1 (or a wire storage device or a wire coil configured according to requirements), a tension wire storage frame 5, a front doubling die 6, a front ribbon wrapping head 7 serving as a front winding device, a clamping type twister 8 serving as a twisting device, a rear ribbon wrapping head 9 serving as a rear winding device, a rear doubling die 10, a roller 12 serving as a pressing device, and a crawler-type tractor 12 and a take-up 14 serving as a take-up traction device which are sequentially arranged.

The structure of the clamping type twister 8 refers to the attached figure 3, the clamping type twister 8 comprises a circular ring-shaped support 85 and at least two groups of twisting chucks, the circular ring-shaped support is installed on a rack, a rotary air bag 84 is arranged on the rack and used for wrapping and protecting wires, and an inner ring of the circular ring-shaped support is coaxially arranged with and communicated with an inner cavity of the rotary air bag; the motor 81 is installed at one side of the frame and is connected with the circular ring-shaped bracket 85 through the synchronous belt 82 to realize synchronous rotation.

The twisting chucks are divided into two groups, one group is dynamic pressure wheel chucks 89, and the other group is static pressure wheel chucks 810; the static pressure wheel chuck 810 is fixedly arranged on the supporting rod 811, the clamping point of the static pressure wheel chuck 810 is positioned at the central position of the circular bracket 85, the supporting rod 811 is fixed at one side of the circular surface of the circular bracket 85, the other symmetrical side of the circular surface is provided with a movable wheel carrier 87, the movable wheel carrier 87 is a pair of flat rods parallel to the supporting rod 811, and the polished rod 86 is vertical to the flat rods and passes through holes arranged on the flat rods; the movable pinch roller chuck 89 is arranged in the middle of the movable wheel frame 87, two sides of the movable wheel frame 87 are connected with the cylinder driving device 88 fixed on the annular surface of the circular bracket, and under the action of the cylinder driving device, the flat rod (the movable wheel frame) can move up and down along with the guide of the polished rod 86, so that the movable pinch roller chuck 89 is driven to approach towards the static pinch roller chuck 810 until the static pinch roller chuck 810 clamps the lead.

Firstly, drawing conductor single wires or cable cores 2 on a pay-off device or a wire coil 1 through a tension wire storage frame 5, then drawing the conductor single wires or cable cores through a front doubling die 6, (if the process is cable core cabling, the filling ropes (strips) 4 on a filling rope (strip) wire storage frame 3 can be simultaneously drawn through the front doubling die 6 together, if conductor single wires are twisted, fillers are generally not needed), then drawing the conductor single wires or cable cores together and sequentially passing through a clamping type twister 8 and a rear doubling die 10, and then drawing the conductor single wires or cable cores through a roller 11 until a crawler-type tractor 12; then, the clamping type twister 8 starts to rotate to drive the conductor or the cable core to perform twisting work, when the preset length, namely the lead between A, B reaches the twisting requirement, the clamping type twister 8 stops rotating, the front ribbon wrapping head 7 and the rear ribbon wrapping head 9 work simultaneously to tighten the twisted cable core to prevent rebound and loosening (if the conductor is twisted, the binding is not needed generally), and then the crawler-type tractor 12 pulls the twisted cable core to the take-up machine 14 to be stored on a wire coil; and in the wire rewinding process, the next twisting section with a set length is simultaneously pulled to the right position, when the position of the next clamping point reaches the clamping type twister 8, the clamping type twister 8 clamps and rotates the twisting cable core again until the twisting reaches the preset length, and the twisting work of the whole section of conductor or cable core is completed in a circulating reciprocating manner through the repeated and intermittent operation of pulling, small section twisting and wire rewinding.

The above process replaces dynamic and continuous stranding with static and intermittent stranding by traction-small segment stranding-winding repeated and intermittent operation, breaks through the traditional process that a heavy stranding cage or a pay-off device needs to be utilized to rotate in the prior art, simplifies the structure and operation, only needs smaller equipment moment of inertia, improves the production safety, improves the wire storage capacity of the pay-off device, provides longer stranding length requirement, greatly saves equipment cost and energy consumption cost, and effectively saves power energy.

Claims

1. An intermittent stranding process is characterized in that: the device comprises a pay-off device, a tension wire storage frame, a front doubling die, a twisting device, a rear doubling die, a pressing device and a take-up traction device which are arranged in sequence, and comprises the following specific steps:

1) The paying-off devices are multiple and are respectively placed on the ground or a fixed platform, each twisting device comprises a twisting chuck, and a clamping opening is formed in each twisting chuck;

3) Starting the twisting chuck to clamp a clamping point on the multi-strand wire with the set length, and then rotating the twisting chuck around the clamping point to drive the multi-strand wire with the set length to be twisted until a set length section is twisted, wherein the multi-strand wire with the set length is twisted into a twisted conductor;

4) After the stranding is finished, stopping rotating the stranding chuck, starting the take-up traction device, and winding the stranded conductor onto a wire coil of the take-up traction device;

5) When the stranded conductor is wound, pulling out a next section of multi-strand wire with a set length from the pay-off device under the traction of the take-up traction device, and enabling the A end of the previous section of multi-strand wire with the set length to be pulled and fixed on the rear doubling die to become the B end of the next section of multi-strand wire with the set length;

2. A batch-wise stranding process according to claim 1, characterised in that: the twisting device also comprises a circular ring-shaped bracket, one end of the twisting chuck is arranged on the circular ring-shaped bracket, and the other end of the twisting chuck is a clamping opening; the stranded chucks are at least two groups, the circular ring-shaped support and the motor synchronously rotate through the synchronous belt, and the lead penetrates through the inner ring space of the circular ring-shaped support.

3. A batch-wise stranding process according to claim 2, characterised in that: each twisting chuck is connected to the driving device, and after the driving device is started, the plurality of twisting chucks move towards the central axis direction of the circular ring-shaped support until the wire is clamped.

4. A batch-wise stranding process according to claim 1 characterised in that: the twisting chucks are divided into two groups, one group is a dynamic pressure wheel chuck, and the other group is a static pressure wheel chuck; the static pressure wheel chuck is fixedly arranged on the supporting rod, the clamping point of the static pressure wheel chuck is positioned at the central position of the circular ring-shaped bracket, the supporting rod is fixed on one side of the circular ring-shaped bracket on the circular ring surface, the other symmetrical side of the circular ring surface is provided with a movable wheel carrier, the movable wheel carrier is a pair of flat rods parallel to the supporting rod, and the flat rods are perpendicular to the flat rods and penetrate through holes arranged on the flat rods; the movable pinch roller chuck is arranged in the middle of the movable wheel frame, two sides of the movable wheel frame are connected with the driving device fixed on the annular surface of the circular bracket, and the flat rod can move up and down along with the guide of the polished rod under the action of the driving device, so that the movable pinch roller chuck can be driven to approach the static pinch roller chuck until the movable pinch roller chuck and the static pinch roller chuck clamp a lead.

5. A batch-wise stranding process according to claim 1 characterised in that: the stranding devices are in one group and are arranged in the middle between the front doubling die and the rear doubling die.

6. A batch-wise stranding process according to claim 1, characterised in that: the stranding devices are provided with a plurality of groups which are equidistantly distributed between A, B ends, each group of stranding devices correspondingly has a clamping point for a multi-strand wire with a set length, and the stranding directions of two adjacent stranding devices are opposite.

7. A batch-wise stranding process according to claim 1 characterised in that: the twisting chuck stops rotating, and when the twisting chuck is still in a clamping state of holding the clamping point, the front winding and binding device and the rear winding and binding device are started to tighten stranded multi-strand wires on two sides of the clamping point, and then the stranded multi-strand wires are compressed and taken up.