Non-rotating air inlet structure and servo tension control centralized upper disc frame type stranding machine

Abstract

The invention relates to the technical field of conductor manufacturing, in particular to a non-rotating air inlet structure and servo tension control centralized upper disc frame type stranding machine, which comprises a fixed base and a rotating body above the fixed base, a plurality of compartments for accommodating a wire coil to rotationally pay off are arranged in the rotating body, and the compartments are arranged around a main shaft. An air pressure-spring ejector pin mechanism and a tension control ejector pin mechanism are arranged in the compartment, and the air pressure-spring ejector pin mechanism is communicated with an external air source; the distance between the air pressure-spring ejector pin mechanisms and the tension control ejector pin mechanisms is variable, and the opposite ends of the air pressure-spring ejector pin mechanisms and the tension control ejector pin mechanisms are rotating parts; the tension control ejector pin mechanism comprises a synchronous wheel disc which is fixedly connected with a second ejector pin rotating based on a fixed shaft and is driven by a servo motor to rotate; by means of the air bag-free structure, the failure rate of elements such as a rotary sliding ring and a connector in an air path system is reduced, jacking force is guaranteed through an air pressure-spring combined mechanism, rotation and air supply do not need to be conducted at the same time, and an air source continuous supply mechanism and closed-loop precise tension control based on a tension servo motor are omitted.

Description

Technical Field

[0001] The present invention relates to the technical field of conductor manufacturing, and particularly relates to a non-rotating air intake structure and a servo tension control centralized upper-disk frame stranding machine. Background Art

[0002] The wire and cable industry is a basic industrial industry in China. The frame stranding machine is currently the main type of stranding process in the wire and cable field, especially widely used in the medium and high voltage cable field. The centralized upper-disk frame stranding machine is the largest-configured characteristic model among the current frame stranding machine models, and it has the following two major problems:

[0003] On the one hand, the currently common structure is the pneumatic thimble series type. Through the rotating air intake device (abbreviated as air bag in the industry), the air source air pressure supply for the conventional up and down disk preparation of each row of thimbles in a rotating frame body and the continuous air pressure maintenance supply during the production rotation operation are realized. The rotating air intake device is arranged at the central axis of the wire inlet end of the stranding body, and is positioned in a suspended or fixed manner. The conventional structure: the air inlet is located on its non-rotating outer shell, and the air outlet is located on the shaft core that can rotate synchronously with the stranding body. Inside, it is sealed by plane friction or circumferential friction. When the frame stranding machine operates, the rotating part of the air bag rotates synchronously, and the air source maintains the air pressure supply to the thimbles and tension demand units in the stranding body. Its maintenance cost is high: Since the rotating part of the air bag is always rotating at a high speed within the working cycle, the friction loss of the sealing mechanism and the internal corrosion and oxidation damage caused by the air source quality will cause the sealing parts and related sealing accessory parts to need to be replaced within a relatively short period; at the same time, its energy consumption cost is relatively large: the air bag body is used to provide air pressure maintenance to the rotating stranding body. When all the pneumatic components are in good sealing states, the required air source flow is not overly high. However, there are many pneumatic thimble groups and other pneumatic components inside the frame stranding machine. After a certain production cycle, air leakage and air leakage are likely to occur, and the air bag body itself will also have air leakage and air leakage irregularly (in addition, when the air bag rotates, due to friction heat, additional air source is needed to blow for cooling). In daily applications, maintenance and repair are usually carried out only when relatively large problems occur. The actual daily air consumption of this structure often significantly exceeds the design value, so the load of the air supply station supporting the workshop of the user factory is relatively large; in addition, considering the uneven quality of the air source supply supporting the cable enterprises (many have problems such as high moisture content and excessive impurities), due to the configuration of all-pneumatic components in the thimbles and tension systems of the rotating body, after long-term cyclic use, the damage rate of the components is quite high.

[0004] On the other hand, the tension control method currently configured in frame stranding machines with centralized winding mechanisms is passive friction tension with pneumatic or mechanical structures. The tension control of pulling and releasing the wire is achieved by friction between the friction plate and the plane of the circular tension disc. This tension mechanism has a simple structure and can basically meet the requirements of stranding environments where the tension requirements are not very strict. However, if the tension value fluctuates due to factors such as the floating of the coil and the cleanliness of the component surface, there will be some fluctuations, and there will be phenomena such as sudden release and sudden stop. It is difficult to meet the requirements of processes with high requirements for conductor strand tension. Summary of the Invention

[0005] The purpose of this invention is to provide a non-rotating air intake structure and a servo tension control centralized upper frame stranding machine, which achieves the following core advantages through technical means: simplified configuration architecture of the air supply system, reduced maintenance costs of the rotating air supply structure, precise control of the tension of each pay-off reel, and reverse tightening function.

[0006] To achieve the above technical objectives, the present invention adopts the following solution:

[0007] A non-rotating air intake structure and servo tension control centralized upper plate frame stranding machine includes a fixed base and a rotating body connected above it. The rotating body is provided with compartments for accommodating the rotating wire reel to release wire. Several compartments are arranged around the main shaft. Each compartment is provided with a pneumatic-spring pin mechanism and a tension control pin mechanism. The pneumatic-spring pin mechanism is independently connected to an external air source.

[0008] The distance between the pneumatic-spring ejector mechanism and the tension control ejector mechanism, which are assembled in pairs, is variable. Both of them are rotating parts at their opposite ends. The pneumatic-spring ejector mechanism has a first ejector pin facing the tension control ejector mechanism, and the tension control ejector mechanism has a second ejector pin facing the pneumatic-spring ejector mechanism. The first ejector pin is connected to a combination of a space-variable air chamber and an elastic element, and provides extrusion force towards the second ejector pin.

[0009] The tension control ejector mechanism includes a synchronous wheel, which is fixedly connected to a second ejector that rotates based on a fixed axis and is driven by a tension servo motor.

[0010] Furthermore, the outer circular surface of the main shaft is vertically connected to Y-shaped partitions and side flanges. Several Y-shaped partitions are arranged at equal angles. Two parallel side flanges clamp all the Y-shaped partitions in the middle. Each Y-shaped partition includes a main base plate and two inclined support plates connected in a V-shape to the outer edge of the main base plate. The root end of the main base plate is connected to the main shaft. The angle α between the two inclined support plates connected at the root end is equal to the angle β between two adjacent main base plates. The product of the number of Y-shaped partitions X and β is: X × β = 360°. The compartments are divided into staggered adjacent compartments A and B, surrounding the outer perimeter of the main shaft. The space formed between the plates is called compartment A, and the space formed between two inclined support plates on the same Y-shaped partition is called compartment B. The number of pneumatic-spring ejector mechanisms and tension control ejector mechanisms connected to each Y-shaped partition is equal. The wire coil is loaded / unloaded in compartment A. The inclined support plates on different Y-shaped partitions on both sides of each compartment A are arranged in parallel. In addition to the two side flanges, the two ends of the main shaft are respectively connected to a rotating conductive slip ring and a wire guide wheel assembly. The guide wheel assembly is provided with a pulley to guide the wire harness through. A lateral through-hole is provided on the side flange near the wire guide wheel assembly.

[0011] Furthermore, the pneumatic-spring ejector mechanism includes a connected air chamber seat and an end cap. A piston disc, piston rod, and piston sleeve, which share a common central axis, are arranged in the cavity formed between the two. One side of the piston disc and the piston sleeve are elastically connected, while on the opposite side, the piston disc and the piston rod are rigidly connected. A safety mechanism is provided on the outside of the end cap to interfere with the outward movement of the piston rod.

[0012] Furthermore, the outer diameter of the piston disc is greater than the outer diameter of the piston sleeve, which is greater than the outer diameter of the piston rod. The gas chamber seat is provided with a first cavity and a second cavity that are slidably connected to the piston disc and the piston sleeve respectively.

[0013] Furthermore, a stepped platform and a cavity are respectively provided on opposite sides of the piston disc and the piston sleeve. An elastic element is provided between the stepped platform and the cavity. The end of the piston sleeve away from the piston disc is connected to the first ejector pin through a bearing. A bushing is connected to the center of the end cover. The piston rod is movably inserted into the bushing. The air chamber seat is fixedly connected to the inclined support plate. A safety unit slot is provided on the outside of the bushing on the end cover.

[0014] Furthermore, an external air source is connected to the air chamber seat through a first quick connector. A solenoid valve is connected between the first quick connector and the air chamber seat. The first quick connector is also connected to a pin safety cylinder through another solenoid valve.

[0015] Furthermore, the extension and retraction actuator of the ejector pin safety cylinder is connected to a safety plug and controls its movement in and out of the safety unit slot. When the safety plug is moved into the corresponding safety unit slot, it blocks the piston rod at the corresponding position from moving outwards towards the end cover.

[0016] Furthermore, the inner circumference of the second ejector pin is connected to a support shaft via a bearing, and both the support shaft and the tension servo motor are vertically fixed to the inclined support plate.

[0017] Furthermore, the tension servo motor is connected to the synchronous pulley via a synchronous belt and employs closed-loop torque control.

[0018] Furthermore, the compartment and the components installed in the compartment rotate synchronously with the horizontally placed main shaft. The main shaft is connected to the fixed base on both sides outside the compartment through main bearings. Rotary conductive slip rings and line guide wheel assemblies are respectively connected to the two ends of the main shaft outside the main bearings. At least one side flange is coaxially connected to a brake disc.

[0019] Furthermore, the synchronization wheel, the first ejector pin, and the second ejector pin are all located in cell A.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. The present invention discloses a non-rotating air intake structure and a servo tension control centralized upper frame stranding machine. The air tank-less structure is more suitable for the continuous improvement of production speed and efficiency of stranding equipment, and reduces the failure rate of related components such as rotating slip rings and air pipe joints. It is superior to the configuration of the rotating air tank air supply structure system of traditional frame stranding machines.

[0022] 2. The present invention discloses a non-rotating air intake structure and a servo tension control centralized upper plate frame stranding machine, which uses an external air source for upper and lower plate operation. The air pressure-spring combined with the pin mechanism ensures the pushing force of the movable pin on the coil, eliminating the structure of simultaneous "rotation-air supply" and eliminating the need for continuous consumption and supply from an air compressor station.

[0023] 3. The present invention discloses a non-rotating air intake structure and a servo tension control centralized upper frame stranding machine, which is designed based on high-precision closed-loop control of tension servo motor to achieve the effect of real-time compensation for tension fluctuations, ensuring that the wire speed meets the standard and the tension of the stranded wire is stable. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present invention;

[0025] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of section A_A;

[0026] Figure 3for Figure 1 Schematic diagram of the cross-sectional structure of section B_B;

[0027] Figure 4 This is a front view structural diagram of Embodiment 1 of the present invention;

[0028] Figure 5 This is a top view of the structure of Embodiment 1 of the present invention;

[0029] Figure 6 This is a schematic diagram of the aerodynamic principle structure in Embodiment 1 of the present invention;

[0030] Figure 7 This is a cross-sectional structural schematic diagram of the pneumatic-spring ejector mechanism in Embodiment 1 of the present invention;

[0031] Figure 8 This is a cross-sectional structural diagram of the tension control ejector pin mechanism in Embodiment 1 of the present invention;

[0032] Figure 9 This is a schematic diagram of the pneumatic principle structure in Embodiment 2 of the present invention;

[0033] Figure 10 This is a cross-sectional structural diagram of the tension control ejector pin mechanism in Embodiment 2 of the present invention;

[0034] The markings in the image are as follows:

[0035] 1. Fixed base; 2. Main shaft; 3. Pneumatic-spring ejector mechanism; 4. Tension-controlled ejector mechanism; 5. Air storage mechanism; 6. Gearbox; 7. Rotary conductive slip ring; 8. Line guide wheel assembly; 9. Y-type partition; 10. Side flange; 11. A compartment; 12. B compartment; 13. First quick connector; 14. Second quick connector; 15. Ejector safety cylinder; 16. Check valve; 17. Pressure switch; 18. Pressure regulating valve; 19. Pressure regulating proportional valve; 20. Safety plug; 21. Main motor; 22. Main bearing;

[0036] 3-1, First ejector pin; 3-2, Air chamber seat; 3-3, End cap; 3-4, Piston disc; 3-5, Piston column; 3-6, Piston sleeve; 3-7, Elastic element; 3-8, Bushing; 3-9, Safety unit slot;

[0037] 4-1. Second ejector pin; 4-2. Support shaft; 4-3. Synchronous pulley; 4-4. Friction disc; 4-5. Tension servo motor; 4-6. Wire feeding tension cylinder; 4-7. Friction assembly; 4-8. Tension servo motor controller; 4-9. Synchronous belt;

[0038] 9-1. Main base plate; 9-2. Inclined support plate;

[0039] 10-1, Wire passage hole. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. In the description of the present invention, it should be noted that if the terms "upper", "lower", "middle", "inner", "outer" are used to indicate the direction or positional relationship based on the direction or positional relationship shown in the accompanying drawings, they are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0041] Currently, traditional ejector cylinders have the following characteristics: 1. The ejector uses the operating structure of a common piston cylinder, moving in both directions. It relies on air pressure to push back and maintain pressure. The outer safety pressure plate group and the piston rod are maintained by a gap. Under the influence of insufficient air pressure and air leakage in the cylinder, the weight of the coil plus the centrifugal force of rotation will cause the piston to retract, and the safety plate will then block the excessive displacement. 2. As a rotating consumable component, the rotating air tank requires frequent replacement of vulnerable parts, resulting in high component and labor costs. 3. The pneumatic-mechanical structure controlled pay-off system has the problem of unstable tension fluctuation, which has a negative impact on conductor quality.

[0042] Example 1: Please refer to the following for details. Figures 1 to 8 A non-rotating air intake structure and servo tension control centralized upper frame stranding machine includes a fixed base 1 and a horizontally movably connected rotating body above it. The rotating body has compartments for accommodating multiple wire reels, with several compartments arranged around a horizontally positioned main shaft 2. The main shaft 2 is driven to rotate by a main motor 21 via a gearbox 6. The speed ratio of the gearbox 6 is adjustable to ensure a strict proportional relationship between the stranding speed and the traction speed. The main motor 21 is a YVP series B3 type variable frequency three-phase asynchronous motor. A pneumatic-spring ejector mechanism 3 and a tension control ejector mechanism are installed in the compartments. 4; The compartments and components installed within them rotate synchronously with the horizontally positioned main shaft 2. The main shaft 2 is connected to the fixed base 1 on both sides outside the compartments via main bearings 22. Rotary conductive slip rings 7 and line guide wheel assemblies 8 are respectively connected to the two ends of the main shaft 2 outside the main bearings 22. The rotating conductive slip rings 7 continuously supply power to the electrical components installed on the main shaft 2 and within the compartments, such as tension sensors, speed sensors, and vibration sensors in the rotating area, preventing the power supply wires from becoming tangled or damaged due to the rotation of the main shaft, and enabling signal interaction between the rotating area and the stationary control system; Reference Figure 2 As shown, the main shaft 2 has a hollow channel inside for the wiring to pass through to the grid.

[0043] The outer circular surface of the main shaft 2 is vertically connected to a Y-shaped partition 9 and a side flange 10. Several Y-shaped partitions 9 are arranged at equal angles. Two parallel side flanges 10 clamp all the Y-shaped partitions 9 in the middle. Each Y-shaped partition 9 includes a main base plate 9-1 and two V-shaped inclined support plates 9-2 connected to the outer edge of the main base plate 9-1. The root end of the main base plate 9-1 is connected to the main shaft 2. (See reference for details.) Figure 3 Based on the frontal view from the transverse end of the main shaft 2, the included angle α between the two inclined support plates 9-2 connected at the root end is equal to the included angle β between two adjacent main base plates 9-1. The product relationship between the number of Y-shaped partition plates 9 X and the included angle β is: X×β=360°. The grid is divided into staggered adjacent A grid 11 and B grid 12. Around the periphery of the main shaft 2, the space formed between two adjacent Y-shaped partition plates 9 is A grid 11, and the space formed between two inclined support plates 9-2 on the same Y-shaped partition plate 9 is B grid 12. The number of pneumatic-spring ejector pin mechanisms 3 and tension control ejector pin mechanisms 4 connected to each Y-shaped partition plate 9 is equal. The wire coil is loaded / unloaded in A grid 11. The inclined support plates 9-2 on different Y-shaped partition plates 9 on both sides of each A grid 11 are arranged in parallel. The side flange 10 of the near-line guide wheel assembly 8 is provided with a lateral through-hole 10-1. At least one side flange 10 is coaxially connected to a brake disc. In normal production shutdown scenarios (such as replacing the wire reel, shift handover shutdown, equipment debugging), the brake disc and the braking device can quickly and smoothly brake the spindle 2. When the equipment experiences abnormal operating conditions (such as wire breakage, abnormal spindle vibration, control system alarm), the brake disc and the braking device can lock the spindle 2 in a very short time and forcibly stop the rotation of the spindle 2.

[0044] The pneumatic-spring ejector mechanism 3 is connected to an external air source through an air passage. The distance between the pneumatic-spring ejector mechanism 3 and the tension control ejector mechanism 4, which are installed in pairs, is variable. Both of them are rotating parts at their opposite ends. The pneumatic-spring ejector mechanism 3 is provided with a first ejector 3-1 that is passively rotated without power on the side facing the tension control ejector mechanism 4. The tension control ejector mechanism 4 is provided with a second ejector 4-1 that is connected to power and actively rotates on the side facing the pneumatic-spring ejector mechanism 3. A wire reel is installed between each pair of first ejector 3-1 and second ejector 4-1. The first ejector 3-1 provides a squeezing force toward the second ejector 4-1, performing a movement toward / away from the second ejector 4-1.

[0045] Specifically, in combination Figure 7As shown, the pneumatic-spring ejector mechanism 3 includes a connected air chamber seat 3-2 and an end cap 3-3. Within the cavity formed by these two components are a piston disc 3-4, a piston rod 3-5, and a piston sleeve 3-6, all aligned along a central axis. The outer diameter of the piston disc 3-4 is greater than that of the piston sleeve 3-6, which is greater than that of the piston rod 3-5. The air chamber seat 3-2 contains a first cavity and a second cavity that are slidably connected to and communicate with the piston disc 3-4 and piston sleeve 3-6, respectively. The first ejector pin 3-1 can be retracted into the second cavity. One side of the piston disc 3-4 is elastically connected to the piston sleeve 3-6, while on the opposite side, the piston disc 3-4 and piston rod 3-5 are rigidly connected and relatively stationary. The air chamber seat 3-2 is connected to an external air pipe, with the air inlet and outlet respectively connected. On both sides of the piston disc 3-4, the air intake direction is switched by a solenoid valve to control the air chamber and change the position of the piston disc 3-4. The piston disc 3-4 and the piston sleeve 3-6 are respectively provided with a stepped platform and a cavity on opposite sides. An elastic element 3-7 is provided between the stepped platform and the cavity. The elastic element 3-7 is a multi-stage butterfly spring. Its combined elastic force can just meet the clamping requirement of a coil full of conductor material. The end of the piston sleeve 3-6 away from the piston disc 3-4 is connected to the first ejector pin 3-1 through a bearing. The center of the end cover 3-3 is connected to the bushing 3-8. The piston column 3-5 is movably inserted into the bushing 3-8. The air chamber seat 3-2 is fixedly connected to the inclined support plate 9-2. On the end cover 3-3, the outer side of the bushing 3-8 is provided with a safety unit slot 3-9.

[0046] Reference Figure 8 The tension control pin mechanism 4 includes a synchronous wheel 4-3. The inner center of the synchronous wheel 4-3 is fixedly connected to a second pin 4-1 that rotates based on a fixed axis, and is also connected to a tension servo motor 4-5. Specifically, the synchronous wheel 4-3 is connected to the tension servo motor 4-5 via a synchronous belt 4-9. The tension servo motor 4-5 is driven by a tension servo motor controller 4-8, which is located in compartment B 12. The support shaft 4-2 and the tension servo motor 4-5 are both fixedly connected to the inclined support plate 9-2. The synchronous wheel 4-3, the first pin 3-1, and the second pin 4-1 are all located in compartment A 11. The tension servo motor 4-5 adopts closed-loop torque control. The PLC, based on its calculated real-time roll diameter, reduces the torque value opposite to the wire feeding direction proportionally with the roll diameter and supplies it to the tension servo motor 4-5 to achieve constant tension control during wire feeding.

[0047] In the design of the gas path system, combined with Figure 6As shown, the external air source is connected to the air chamber seat 3-2 through the first quick connector 13. A two-position solenoid valve is connected between the first quick connector 13 and the air chamber seat 3-2. The first quick connector 13 is also connected to the ejector pin safety cylinder 15 through another two-position solenoid valve. In addition to the above scheme, filters should be installed in necessary parts of the air circuit. The function of the filter is to filter out condensate and impurities in the compressed air, prevent impurities from accumulating in the air circuit pipes and valves and causing air circuit blockage, ensure stable compressed air flow and pressure, and avoid problems such as lag or insufficient stroke of pneumatic components (such as air pressure-spring ejector pin mechanism and ejector pin safety cylinder).

[0048] The extension and retraction actuator of the ejector pin safety cylinder 15 is connected to a safety plug 20 and controls its movement into / out of the safety unit slot 3-9. When the first ejector pin 3-1 moves toward the corresponding second ejector pin 4-1 to clamp the wire coil, after the safety plug 20 moves into the corresponding safety unit slot 3-9, the piston pin 3-5 at the corresponding position is blocked from moving outward toward the end cover 3-3, preventing the distance between the first ejector pin 3-1 and the corresponding second ejector pin 4-1 from widening, thus realizing the ejector pin safety function.

[0049] After all components on the rotating body are installed, an overall dynamic balance test is required. The air chamber in the pneumatic-spring pin mechanism 3 needs to be sealed, and the butterfly spring assembly needs to be pressure tested. The compression action can be performed if the conventional air source pressure of 0.45~0.5Mpa is met, and the elastic reset clamping pressure can be maintained at 0.4MPa or above.

[0050] In application, an external air source is used to fix and tighten the wire coil. The piston disc 3-4 pushes the first ejector pin 3-1 forward. After it reaches the position, the air source pressure is greater than the elastic force of the elastic element 3-7. The piston disc 3-4 and the piston sleeve 3-6 can maintain the compressed state of the butterfly spring. At this time, the first ejector pin 3-1 and the corresponding second ejector pin 4-1 position the wire coil in place. The control ejector pin safety cylinder 15 is activated to close the safety plug 20 in the safety unit slot 3-9. Then, the quick-connect air source is removed, the butterfly spring assembly springs back to its original position, and the piston column 3-5 abuts against the external safety plug 20. At this time, the entire pneumatic-spring ejector pin mechanism 3 achieves mechanical tightening without a continuous air source supply.

[0051] Example 2: Referring to the reference Figure 9 and Figure 10 As shown, the difference from Embodiment 1 is that: a pneumatic-spring ejector mechanism 3, a tension control ejector mechanism 4, and an air storage mechanism 5 are provided in the compartment; the pneumatic-spring ejector mechanism 3 and the air storage mechanism 5 are each provided with an air passage connected to an external air source, and the air storage mechanism 5 supplies air to the tension control ejector mechanism 4.

[0052] Specifically, the tension control pin mechanism 4 includes a double-layer tension disc assembly, a wire feeding tension cylinder 4-6, and a friction assembly 4-7. The inner center of the tension disc assembly is fixedly connected to the second pin 4-1. The inner circumference of the second pin 4-1 is connected to a support shaft 4-2 via a bearing. The tension disc assembly includes a synchronous wheel 4-3 and a friction disc 4-4 stacked coaxially. The synchronous wheel 4-3 is connected to a tension servo motor 4-5 via a synchronous belt 4-9. The tension servo motor 4-5 is driven by a tension servo motor controller 4-8, which is located in compartment B 12. The extension and retraction execution end of the wire feeding tension cylinder 4-6 is connected to the friction assembly 4-7 and controls whether it contacts the friction disc 4-4. When the wire feeding bundle is too loose, the friction assembly 4-7 contacts the friction disc 4-4. The support shaft 4-2 and the tension servo motor 4-5 are both fixedly connected to the inclined support plate 9-2. The tension disc assembly, the first pin 3-1, and the second pin 4-1 are all located in compartment A 11.

[0053] In this embodiment, the gas system design includes: the gas storage mechanism 5 comprising a gas storage tank; an external gas source is connected to the gas chamber seat 3-2 and the gas storage tank via a first quick connector 13 and a second quick connector 14, respectively; a two-position solenoid valve connects the first quick connector 13 and the gas chamber seat 3-2; the first quick connector 13 is also connected to a pin safety cylinder 15 via another two-position solenoid valve; and a one-way valve 16 connects the second quick connector 14 and the gas storage tank. The one-way valve 16 (also known as a pneumatic check valve / non-return valve) is a control element that allows gas to flow in only one direction and automatically prevents reverse flow. It automatically opens and closes based on gas pressure difference without external power. The positive flow direction is towards the air reservoir. The air reservoir is also connected to a pressure switch 17 and a pressure regulating valve 18. The pressure switch 17 is electrically connected to the pressure regulating valve 18 and controls its pressure release process, ensuring that the pressure in the air reservoir is at the set value. A pressure regulating proportional valve 19 is connected between the air reservoir and the wire tension cylinders 4-6. The pressure regulating proportional valve 19 is an "electromechanical-fluid" conversion element, which converts the input analog electrical signal (usually 0-10V voltage, 4-20mA current) into a fixed proportional relationship with the output pressure: when the electrical signal changes continuously, the output pressure will change continuously and steplessly proportionally, thereby continuously adjusting the pressure to achieve wire tension control. Filters should be installed in necessary parts of the air circuit. The function of the filters is to filter condensate and impurities, preventing impurities from accumulating in the air circuit pipes and valves and causing blockages, ensuring stable compressed air flow and pressure, and avoiding problems such as lag and force fluctuations in pneumatic components (such as tension cylinders and safety cylinders), thereby ensuring the consistency of the strand pitch and tension stability.

[0054] The present invention, based on the above technical solution, provides a static air path connection for the rotating auger through a quick-connect air source, ensuring the movement of the upper and lower plates of the ejector pin and the execution of the ejector pin safety mechanism within the rotating auger. An independent air storage tank structure is configured on the tension control air supply line, simultaneously filling the air storage tank during quick-connect inflation. After the upper and lower plates move and the safety cylinder reaches its stroke position, the quick-connect air source is removed, allowing the auger to independently supply air during rotation, eliminating the need for a system that supplies air while rotating. The tension air source is a non-continuously consumed air supply method, and the air volume and pressure in the air storage tank are sufficient to maintain the supply. The ejector pin safety cylinder 15 operates safely without requiring further action. This air-tank-less air supply system reduces the investment in rotating air supply components, lowers the maintenance cost of the rotating air tank, reduces energy consumption in the air supply process, and extends the service life of the matching ejector pin assembly by 50% compared to conventional purely pneumatic ejector pins, while reducing maintenance frequency by 50%.

[0055] This technical solution also develops and applies servo tension control technology. Based on the high-precision closed-loop control of the tension servo motor, its advantage lies in real-time compensation for tension fluctuations in the pneumatic mechanical control structure. It changes the mechanism that can only passively prevent the tension plate from rotating in the same direction, and actively drives the tension plate to rotate in both directions, achieving more precise tension control and adjustment. This ensures that the line speed meets the standard, the wire tension is stable, reduces material and daily defect losses, simplifies the equipment structure, and can meet more working conditions.

[0056] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. For those skilled in the art, various changes, modifications or additions made without departing from the concept of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A non-rotating air intake structure and servo tension control centralized upper frame stranding machine, comprising a fixed base (1) and a rotating body connected above it, wherein the rotating body is provided with a compartment for accommodating wire reels, characterized in that: Several compartments are arranged around the main shaft (2), and each compartment is equipped with a pneumatic-spring ejector mechanism (3) and a tension control ejector mechanism (4). The pneumatic-spring ejector mechanism (3) is independently connected to an external air source. The pneumatic-spring ejector mechanism (3) and the tension control ejector mechanism (4) are mounted in a V-shape with a variable spacing. Both of them are configured as rotating parts at their opposite ends. The pneumatic-spring ejector mechanism (3) is provided with a first ejector (3-1) facing the tension control ejector mechanism (4), and the tension control ejector mechanism (4) is provided with a second ejector (4-1) facing the pneumatic-spring ejector mechanism (3). The first ejector (3-1) is connected to a combination of a space-variable air chamber and an elastic element (3-7) and provides extrusion force towards the second ejector (4-1). The tension control pin mechanism (4) includes a synchronous wheel (4-3), which is fixedly connected to a second pin (4-1) that rotates based on a fixed axis, and is driven by a tension servo motor (4-5).

2. The non-rotating air intake structure and servo tension control centralized upper frame stranding machine according to claim 1, characterized in that: The outer circular surface of the main shaft (2) is vertically connected to Y-shaped partitions (9) and side flanges (10). Several Y-shaped partitions (9) are arranged at equal angles. Two parallel side flanges (10) clamp all the Y-shaped partitions (9) in the middle. The Y-shaped partition (9) includes a main base plate (9-1) and two inclined support plates (9-2) connected to the outer edge of the main base plate (9-1) in a V-shape. The root end of the main base plate (9-1) is connected to the main shaft (2). The angle α between the two inclined support plates (9-2) connected at the root end is equal to the angle β between two adjacent main base plates (9-1). The product relationship between the number of Y-shaped partitions (9) X and β is: X×β=360°. The grid is divided into staggered adjacent A grids (11) and B grids (12). The space formed between the plates (9) is the A-cell (11), and the space formed between the two inclined support plates (9-2) on the same Y-shaped partition (9) is the B-cell (12). Each Y-shaped partition (9) is equipped with an equal number of pneumatic-spring ejector mechanisms (3) and tension control ejector mechanisms (4). The wire coil is loaded / unloaded in the A-cell (11). The inclined support plates (9-2) on both sides of each A-cell (11) are arranged in parallel. Outside the two side flanges (10), the two ends of the main shaft (2) are respectively connected to a rotating conductive slip ring (7) and a wire guide wheel assembly (8). The guide wheel assembly (8) is provided with a pulley to guide the wire harness through. The side flange (10) near the wire guide wheel assembly (8) is provided with a wire hole (10-1).

3. The non-rotating air intake structure and servo tension control centralized upper frame stranding machine according to claim 2, characterized in that: The pneumatic-spring ejector mechanism (3) includes a connected air chamber seat (3-2) and an end cap (3-3). A piston disc (3-4), a piston rod (3-5), and a piston sleeve (3-6) with a common central axis are arranged in the cavity formed between the two. One side of the piston disc (3-4) and the piston sleeve (3-6) are elastically connected. On the opposite side, the piston disc (3-4) and the piston rod (3-5) are rigidly connected. A safety mechanism is provided on the outside of the end cap (3-3) to interfere with the outward movement of the piston rod (3-5).

4. The non-rotating air intake structure and servo tension control centralized upper frame stranding machine according to claim 3, characterized in that: The outer diameter of the piston disc (3-4) is greater than the outer diameter of the piston sleeve (3-6) and the outer diameter of the piston column (3-5). The gas chamber seat (3-2) is provided with a first cavity and a second cavity that are slidably connected to the piston disc (3-4) and the piston sleeve (3-6) respectively.

5. The non-rotating air intake structure and servo tension control centralized upper frame stranding machine according to claim 4, characterized in that: The piston disc (3-4) and piston sleeve (3-6) are respectively provided with a stepped platform and a cavity on opposite sides. An elastic element (3-7) is provided between the stepped platform and the cavity. The end of the piston sleeve (3-6) away from the piston disc (3-4) is connected to the first ejector pin (3-1). The center of the end cover (3-3) is connected to the bushing (3-8). The piston rod (3-5) is inserted into the bushing (3-8). The air chamber seat (3-2) is fixedly connected to the inclined support plate (9-2). A safety unit slot (3-9) is provided on the outside of the bushing (3-8) on the end cover (3-3).

6. The non-rotating air intake structure and servo tension control centralized upper frame stranding machine according to claim 5, characterized in that: An external air source is connected to the air chamber seat (3-2) through the first quick connector (13). A solenoid valve is connected between the first quick connector (13) and the air chamber seat (3-2). The first quick connector (13) is also connected to the ejector pin safety cylinder (15) through another solenoid valve.

7. The non-rotating air intake structure and servo tension control centralized upper frame stranding machine according to claim 6, characterized in that: The extension and retraction actuator of the ejector pin safety cylinder (15) is connected to the safety plug (20) and controls it to move in / out of the safety unit slot (3-9). When the safety plug (20) moves into the corresponding safety unit slot (3-9) and is in place, the blocking piston (3-5) moves to the outside of the end cover (3-3).

8. The non-rotating air intake structure and servo tension control centralized upper frame stranding machine according to claim 2, characterized in that: The inner circumference of the second ejector pin (4-1) is connected to a support shaft (4-2) via a bearing. The support shaft (4-2) and the tension servo motor (4-5) are both fixedly connected to the inclined support plate (9-2).

9. A non-rotating air intake structure and servo tension control centralized upper frame stranding machine according to claim 8, characterized in that: The tension servo motor (4-5) adopts closed-loop torque control and is connected to the synchronous pulley (4-3) via a synchronous belt (4-9).

10. A non-rotating air intake structure and servo tension control centralized upper frame stranding machine according to claim 2, characterized in that: The compartment rotates synchronously with the main shaft (2). The main shaft (2) is connected to the fixed base (1) on both sides outside the compartment through the main bearing (22). The main shaft (2) is connected to the rotating conductive slip ring (7) and the line guide wheel assembly (8) at both ends outside the main bearing (22).

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