A wire feeding device for a tube stranding machine

Abstract

This invention discloses a wire-feeding device for a tube stranding machine, relating to the field of tube stranding machine wire-feeding technology. It includes a main frame and a wire-feeding reel, the reel being rotatably connected to one side of the main frame. The main frame is equipped with a drive mechanism for rotating the wire-feeding reel. It also includes a tension control device, comprising an elastic conductor mechanism and a pressure sensor. When the wire-feeding speed is greater than or less than the take-up speed, the metal wire compresses or releases the main spring as it passes the oscillating guide wheel. The main spring then exerts a certain force on the pressure sensor through a top block, facilitating timely adjustment of the balance between the wire-feeding and take-up speeds based on the feedback signal from the pressure sensor, thereby maintaining a constant tension in the metal wire.

Description

Technical Field

[0001] This invention relates to the field of wire feeding technology for tube stranding machines, and more specifically to a wire feeding device for tube stranding machines. Background Technology

[0002] A tubular stranding machine is a type of wire stranding machine. Tubular stranding machines are widely used in fields such as wire and cable, communications, and data transmission. They are an indispensable piece of production equipment in these industries. They mainly use the rotational motion of a tubular rotating body to complete the stranding function of metal wires.

[0003] When existing tube stranding machines are performing metal wire stranding operations, the metal wire is released through a wire release device at one end. Since the metal wire needs to be continuously released, a wire take-up device must be set up at the other end to pull the metal wire, so that the metal wire can be continuously stranded through the stranding position.

[0004] The shortcomings of existing tube stranding machines are as follows: when processing small-diameter metal wires, the required tension is very small, and due to the inherent properties of the mechanical structure, the mechanical damping cannot meet the requirements of low tension. Even if the speeds of the pay-off drive motor and the take-up drive motor are set to the same at the beginning, the irregular arrangement of the metal wires on the spool can easily lead to fluctuations in the pay-off speed. This can easily result in excessively high or low wire tension, making it unstable and thus affecting the quality of the stranded product. Summary of the Invention

[0005] The purpose of this invention is to provide a wire-feeding device for a tube stranding machine, so as to solve the technical problem in the prior art that the irregular arrangement of the wires on the spool and the inherent properties of the mechanical structure make it difficult to maintain stable tension of the wire during the wire-feeding process of the tube stranding machine, thus affecting the product production quality.

[0006] The technical problem to be solved by this invention can be achieved through the following technical solution:

[0007] A wire feeding device for a tube stranding machine includes a main frame and a wire feeding reel, the wire feeding reel being rotatably connected to one side of the main frame. The main frame is provided with a drive mechanism for rotating the wire feeding reel. A wire-passing hole is provided on the side of the main frame away from the wire feeding reel. The device also includes:

[0008] A tension control device includes an elastic wire mechanism and a pressure sensor. The elastic wire mechanism is installed on the other side of the main frame. The pressure sensor cooperates with the elastic wire mechanism, and the elastic wire mechanism is used to compress the pressure sensor. The pressure sensor is also electrically connected to the drive mechanism.

[0009] As a further embodiment of the present invention: the elastic conductor mechanism includes a linear guide rail, a conductor slide, a main spring, a main guide rod, and a top block. The linear guide rail is fixedly disposed on the inner side of the main frame. The conductor slide is slidably connected to the linear guide rail. A support plate is fixedly connected to one end of the linear guide rail. The main guide rod is horizontally fixedly connected to the support plate. The pressure sensor is mounted on the support plate. The top block is slidably connected to the main guide rod. The main spring is connected between the conductor slide and the top block.

[0010] As a further embodiment of the present invention: the guide slide includes a slider and a swing guide wheel, the slider is slidably connected to the main guide rod, and the swing guide wheel is rotatably connected to the slider.

[0011] As a further embodiment of the present invention: a steering guide frame is also installed on the side of the main frame near the elastic guide mechanism. The steering guide frame includes a fixed bracket, a guide wheel and a limiting member. The fixed bracket is fixedly connected to the main frame, the guide wheel is rotatably connected to the fixed bracket, and the limiting member cooperates with the guide wheel.

[0012] As a further aspect of the present invention: the limiting member includes a wire clamping post, which is rotatably connected to a fixed bracket, and two sets of wire clamping posts are symmetrically distributed.

[0013] As a further embodiment of the present invention: the elastic conductor mechanism further includes a temporary tension auxiliary mechanism, which includes an auxiliary spring, a piston pushing mechanism, and a limit triggering mechanism. The piston pushing mechanism is disposed on the top block, and the auxiliary spring is connected to the pushing end of the piston pushing mechanism. A mounting base is fixedly connected inside the main frame, and the limit triggering mechanism is mounted on the mounting base. The limit triggering mechanism cooperates with the slider, and is also electrically connected to the piston pushing mechanism.

[0014] As a further embodiment of the present invention: the piston pushing mechanism includes a piston cylinder, a piston slide, and an air pump. The piston cylinder is fixedly connected to the top block near the slider. The piston slide is slidably connected inside the piston cylinder. The side of the piston slide near the slider is fixedly connected to an auxiliary spring. A docking block is fixedly connected to the end of the auxiliary spring near the slider. A secondary guide rod is fixedly connected to the top block, and the secondary guide rod passes through the docking block and the slider in sequence. The air pump is fixedly installed on the mounting base. A connecting air passage is opened inside the top block. An electromagnetic valve is fixedly installed on the outer wall of the top block. The electromagnetic valve is connected to the piston cylinder through the connecting air passage. The air port end of the air pump is connected to the electromagnetic valve. Both the air pump and the electromagnetic valve are electrically connected to a pressure sensor.

[0015] As a further embodiment of the present invention: the limit triggering mechanism includes a limit block and a pressure sensing switch, the mounting base is provided with a connecting groove, the limit block is slidably connected in the connecting groove, and a limit spring is connected between the limit block and the connecting groove, the pressure sensing switch is installed on the limit block, and the pressure sensing switch is electrically connected to the air pump.

[0016] As a further aspect of the present invention: the support plate is threaded with a safety screw that mates with the top block.

[0017] As a further embodiment of the present invention: the driving mechanism includes a servo motor, a transmission gear, an intermediate gear and a linkage gear. The servo motor is fixedly connected to the bottom of the main frame and is electrically connected to the pressure sensor. The transmission gear is fixedly connected to the main shaft end of the servo motor. The linkage gear is coaxially connected to the wire feeding reel. The intermediate gear is rotatably connected to the main frame and meshes between the transmission gear and the linkage gear.

[0018] The beneficial effects of this invention are:

[0019] 1. When the wire feeding speed is less than the wire take-up speed, the metal wire compresses the main spring as it passes the oscillating guide wheel. The main spring then increases the force exerted by the top block on the pressure sensor, which in turn sends a signal. The PLC then controls the wire feeding reel speed to increase. When the wire feeding speed exceeds the take-up speed, the main spring is released, causing the force exerted by the top block on the pressure sensor to decrease. The pressure sensor then sends a signal, which in turn controls the wire feeding reel speed to decrease. In other words, the tension of the metal wire is fed back in real time through the main spring, oscillating guide wheel, top block, and pressure sensor, allowing for timely adjustment and balancing of the wire feeding and take-up speeds, thereby facilitating the maintenance of constant tension in the metal wire.

[0020] 2. When the main spring is compressed or released for a long time, causing the main spring to become fatigued or damaged, the swing guide wheel will easily move continuously along the compression direction of the main spring under the traction of the metal wire. During this process, the swing guide wheel can be limited by the set limit block, and the pressure sensing switch on the limit block will make the air pump run. The air pressure will act on the piston slide in the piston cylinder, thereby pushing out the spare auxiliary spring to abut against the slider connected to the swing guide wheel. In this way, the swing guide wheel can temporarily maintain a certain tension by relying on the elastic force of the auxiliary spring, avoiding the metal wire from breaking, and at the same time providing a certain maintenance time. Attached Figure Description

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 3 This is a schematic diagram of the structure of the metal wire passing through the guide wheel, the oscillating guide wheel and the wire hole in this invention;

[0025] Figure 4 This is a schematic diagram of the structure in which the servo motor and the pay-off reel are connected in this invention;

[0026] Figure 5 This is a schematic diagram of the clamping post structure in this invention;

[0027] Figure 6 This is a top view of the relative positions of the slider, swing guide wheel, top block and pressure sensor in this invention.

[0028] Figure 7 yes Figure 6 Enlarged structural diagram at point B;

[0029] Figure 8 This is a top view schematic diagram of the auxiliary spring's engagement and connection between the slider and the top block in this invention.

[0030] In the diagram: 1. Main frame; 2. Cable reel; 3. Cable guide hole; 4. Linear guide rail; 5. Support plate; 6. Slider; 7. Swing guide wheel; 8. Main spring; 9. Main rod; 10. Top block; 11. Cable clamping post; 12. Fixed bracket; 13. Wire guide wheel; 14. Servo motor; 15. Transmission gear; 16. Intermediate gear; 17. Linkage gear; 18. Pressure sensor; 19. Safety screw; 20. Solenoid valve; 21. Air pump; 22. Limit stop; 23. Connecting slide; 24. Pressure sensing switch; 25. Connecting air passage; 26. Piston cylinder; 27. Piston slide; 28. Auxiliary spring; 29. ​​Connecting block; 30. Secondary guide rod; 31. Mounting base. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figures 1-8As shown, a wire feeding device for a tube stranding machine includes a main frame 1 and a wire feeding reel 2. The wire feeding reel 2 is rotatably connected to one side of the main frame 1 via a rotating shaft. A metal wire to be stranded is wound on the wire feeding reel 2. The main frame 1 is equipped with a drive mechanism for rotating the wire feeding reel 2. A wire-passing hole 3 is provided on the side of the main frame 1 away from the wire feeding reel 2 for the metal wire to pass through. The passed-through metal wire is connected to a take-up mechanism. Through the combined action of wire feeding and take-up, the metal wire moves. The device also includes a tension control device; the tension control device includes an elastic conductor mechanism and a pressure sensor 18. The elastic wire guide mechanism is installed on the other side inside the main frame 1. The pressure sensor 18 cooperates with the elastic wire guide mechanism, and the elastic wire guide mechanism is used to squeeze the pressure sensor 18. The pressure sensor 18 is also electrically connected to the drive mechanism. The metal wire released from the wire reel 2 passes around the elastic wire guide mechanism and exits through the wire hole 3. When the metal wire arrangement on the reel is irregular or the inherent properties of some mechanical structures cause the wire release speed to be less than the wire take-up speed, the metal wire becomes taut and the tension is greater. When passing through the elastic wire guide mechanism, it will exert a greater squeezing force on the elastic wire guide mechanism. The mechanism exerts a significant force on the pressure sensor 18. When the pressure sensor 18 detects a pressure value exceeding a certain threshold, it sends a signal to the PLC controller. The PLC controller then increases the rotational speed of the drive mechanism's feed reel 2 according to a pre-set program, increasing the feed speed. As the feed and take-up speeds gradually balance, the elastic conductor mechanism rebounds the metal wire, restoring the wire tension to the corresponding value and preventing excessive tension. When the feed speed exceeds the take-up speed, the wire tension decreases, causing it to compress the elastic conductor mechanism as it passes through. The force is relatively small, resulting in a smaller force exerted by the elastic wire mechanism on the pressure sensor 18. At this time, the pressure sensor 18 detects that the pressure value is less than the set value and will feed back a signal to the matching PLC controller. The PLC controller will reduce the rotation speed of the drive mechanism driving the wire feeding reel 2 according to the set program, thereby reducing the wire feeding speed and gradually balancing the wire feeding and reeling speeds, thereby increasing the tension. In this way, the tension can be kept stable. That is, the elastic wire mechanism and the pressure sensor 18 work together to detect and feedback the tension of the metal wire during the wire feeding process, which can be easily adjusted in a timely manner according to the situation.

[0033] In some specific implementation plans, such as Figure 2As shown, the elastic conductor mechanism includes a linear guide rail 4, a conductor slide, a main spring 8, a main guide rod 9, and a top block 10. The linear guide rail 4 is fixedly installed inside the main frame 1, with two symmetrically distributed components. The conductor slide is slidably connected to the linear guide rail 4. One end of the linear guide rail 4 is fixedly connected to a support plate 5. The main guide rod 9 is horizontally fixedly connected to the support plate 5, with two symmetrically distributed components. The main guide rod 9 exists parallel to the linear guide rail 4. A pressure sensor 18 is mounted on the support plate 5. The top block 10 is slidably connected to the main guide rod 9, which passes through... The top block 10 is set up, and the main spring 8 is connected between the wire slide and the top block 10. The main spring 8 is also sleeved on the main guide rod 9. When the metal wire passes through the wire slide and maintains an appropriate constant tension, the main spring 8 is in a semi-compressed state. It can be further compressed when the tension increases. The pressure sensor 18 is detected and fed back by the pressure action of the top block 10. When the tension decreases, the main spring 8 releases the rebound force to push the wire slide, and the wire slide holds the metal wire in place to prevent it from loosening and falling off. During this process, the force of the top block 10 on the pressure sensor 18 decreases.

[0034] The guide slide includes a slider 6 and a swing guide wheel 7. The slider 6 is slidably connected to the main rod 9, which passes through the slider 6. The end of the main rod 9 away from the support plate 5 is threaded with a limit nut to prevent the slider 6 from falling off. The swing guide wheel 7 is rotatably connected to the slider 6 via a rotating shaft.

[0035] In addition, a steering guide frame is installed on the side of the main frame 1 near the elastic guide mechanism. The steering guide frame includes a fixed bracket 12, a guide wheel 13 and a limiting member. The fixed bracket 12 is fixedly connected to the main frame 1 by bolts. The guide wheel 13 is rotatably connected to the fixed bracket 12 by a rotating shaft. The limiting member cooperates with the guide wheel 13.

[0036] like Figure 5 As shown, the limiting component includes a wire clamping post 11, which is rotatably connected to the fixed bracket 12, and two sets of wire clamping posts 11 are symmetrically distributed.

[0037] like Figure 3 As shown, when the metal wire is released from the wire release reel 2, it first passes between the two wire clamping posts 11, then wraps around the guide wheel 13, and then around to the swing guide wheel 7, and finally passes through the wire hole 3. This makes it convenient for the metal wire to be acted upon by the swing guide wheel 7 and the main spring 8.

[0038] In some specific implementations, if the main spring 8 undergoes prolonged deformation and elastic fatigue, resulting in reduced elasticity, the top block 10 will be unable to effectively compress the pressure sensor 18. Even if the take-up speed is greater than the release speed, causing excessive tension in the metal wire, the oscillating guide wheel 7 will only experience significant displacement under the compression of the metal wire, but the actual force exerted on the top block 10 will not reach the corresponding magnitude. Therefore, the pressure sensor 18 cannot detect the corresponding force and cannot provide feedback to control the drive mechanism. To solve this problem, a temporary tension auxiliary mechanism is provided. The elastic wire mechanism also includes a temporary tension auxiliary mechanism, which includes an auxiliary spring 28, a piston pushing mechanism, and a limit triggering mechanism. The piston pushing mechanism is mounted on the top block 10, and the auxiliary spring 28 is connected to the pushing end of the piston pushing mechanism. A mounting base 31 is fixedly connected inside the main frame 1, located below the linear guide rail 4. The guide rail 4 is fixedly connected to the main frame 1 via the mounting base 31. The limit trigger mechanism is mounted on the mounting base 31 and cooperates with the slider 6. The limit trigger mechanism is also electrically connected to the piston pushing mechanism. When the metal wire generates a large tension due to excessive winding speed, it exerts a squeezing effect on the swing guide wheel 7, causing the swing guide wheel 7 to slide along the main guide rod 9 and compress the main spring 8 by relying on the slider 6. At this time, due to elastic fatigue or damage of the main spring 8, it cannot effectively generate the corresponding elastic force to make the top block 10 squeeze the pressure sensor 18. Therefore, the slider 6 will continue to move until it touches the limit trigger mechanism. Then, the limit trigger mechanism will activate the piston pushing mechanism. The piston pushing mechanism will drive the auxiliary spring 28 to move and touch the slider 6, pushing it up to reset. During this process, the auxiliary spring 28 will be compressed to generate a rebound force, which is convenient to rely on the piston pushing mechanism to react on the top block 10, so that the pressure sensor 18 is subjected to the corresponding pressure.

[0039] Among them, such as Figure 7As shown, the piston pushing mechanism includes a piston cylinder 26, a piston slide 27, and an air pump 21. The piston cylinder 26 is fixedly connected to the top block 10 near the slider 6. The piston slide 27 is slidably connected inside the piston cylinder 26. The side of the piston slide 27 near the slider 6 is fixedly connected to an auxiliary spring 28. A docking block 29 is fixedly connected to the end of the auxiliary spring 28 near the slider 6. A secondary guide rod 30 is fixedly connected to the top block 10, and the secondary guide rod 30 passes through the docking block 29 and the slider 6 in sequence. The slider 6 can simultaneously move relative to the main guide rod 9 and the secondary guide rod 21. The guide rod 30 slides, and the docking block 29 can slide relative to the auxiliary guide rod 30. The air pump 21 is fixedly installed on the mounting base 31. A connecting air passage 25 is opened in the top block 10. A solenoid valve 20 is fixedly installed on the outer wall of the top block 10. The solenoid valve 20 is connected to the piston cylinder 26 through the connecting air passage 25. The air pump 21 is a dual-function pump that can both draw in air and inflate air. The air port end of the air pump 21 is connected to the solenoid valve 20 through a pipe. The solenoid valve 20 is normally in the open state. Both the air pump 21 and the solenoid valve 20 are electrically connected to the pressure sensor 18.

[0040] The limit triggering mechanism includes a limit block 22 and a pressure sensing switch 24. A connecting groove 23 is provided on the mounting base 31. The limit block 22 is slidably connected in the connecting groove 23, and a compressible limit spring is connected between the limit block 22 and the connecting groove 23. The pressure sensing switch 24 is installed on the limit block 22 and is electrically connected to the air pump 21.

[0041] When the metal wire generates significant tension due to excessive winding speed, it exerts a squeezing effect on the oscillating guide wheel 7. This causes the oscillating guide wheel 7 to compress the main spring 8 by sliding along the main guide rod 9 via the slider 6. At this point, due to elastic fatigue or damage to the main spring 8, it cannot effectively generate the corresponding elastic force to cause the top block 10 to squeeze the pressure sensor 18. Therefore, the slider 6 will continue to move until it touches the limit stop 22. Specifically, as shown... Figure 8 As shown, when the pressure sensor 24 is pressed, it is activated, causing the air pump 21 to start its inflation function, inflating the piston cylinder 26. Under this pressure, the piston slide 27 slides outward along the piston cylinder 26, and the piston slide 27, along with the auxiliary spring 28, extends out of the piston cylinder 26. The auxiliary spring 28 abuts against the slider 6 via the connecting block 29. During this process, the auxiliary spring 28 compresses, generating a rebound force that acts on the top block 10, allowing the top block 10 to effectively press the pressure sensor 18 again. Figure 8After the auxiliary spring 28 extends and abuts against the docking block 29, it is in a compressed state. When the pressure sensor 18 senses the corresponding value, it feeds back a control signal, which facilitates the adjustment of the speed of the drive mechanism driving the wire feeding reel 2. When the pressure sensor 18 senses the corresponding pressure value and feeds back, it also feeds back a control signal to close the solenoid valve 20 and stop the air pump 21, so that the piston cylinder 26 maintains the corresponding air pressure, that is, keeps the piston slide 27 in the corresponding position, effectively supporting the auxiliary spring 28 and facilitating its function.

[0042] In some specific implementations, a safety screw 19 is threaded onto the support plate 5 to engage with the top block 10. The safety screw 19 limits the minimum distance between the top block 10 and the support plate 5 to prevent the top block 10 from excessively squeezing the pressure sensor 18 and damaging it.

[0043] It should be noted that, in order to facilitate the reminder of staff, an alarm can also be installed that is electrically connected to the pressure sensing switch 24.

[0044] In some specific implementation plans, such as Figure 4 As shown, the drive mechanism includes a servo motor 14, a transmission gear 15, an intermediate gear 16, and a linkage gear 17. The servo motor 14 is fixedly connected to the bottom of the main frame 1, and is electrically connected to the pressure sensor 18 via a PLC controller. The transmission gear 15 is fixedly connected to the spindle end of the servo motor 14. The linkage gear 17 is coaxially connected to the pay-off reel 2. The intermediate gear 16 is rotatably connected to the main frame 1 via a rotating shaft, and meshes between the transmission gear 15 and the linkage gear 17. When the servo motor 14 starts, it drives the pay-off reel 2 to rotate through the transmission gear 15, intermediate gear 16, and linkage gear 17. When the pressure sensor 18 sends a feedback signal to the PLC controller, the PLC controller controls the servo motor 14 to increase or decrease its speed.

[0045] To facilitate understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution will now be briefly explained in conjunction with specific application scenarios:

[0046] First, when the metal wire is released from the wire release reel 2, it passes between the two wire clamping posts 11, then around the guide wheel 13, and then around to the swing guide wheel 7, and finally passes through the wire hole 3.

[0047] When the oscillating guide wheel 7 is in normal working condition, it is at an origin position, which is the origin of the set tension. At this time, the main spring 8 is in a semi-compressed state. When the take-up speed is greater than the unwinding speed, the metal wire is further tightened, and the tension is greater, which exerts a squeezing effect on the oscillating guide wheel 7. This causes the oscillating guide wheel 7 to slide along the main guide rod 9 with the slider 6 to compress the main spring 8. The rebound force generated by the compression of the main spring 8 acts on the top block 10, causing the top block 10 to squeeze the pressure sensor 18. When the pressure sensor 18 detects that the pressure value exceeds the corresponding value, it feeds back a signal to the PLC controller. The PLC controller increases the rotation speed of the drive mechanism driving the unwinding reel 2 according to the set program, thereby increasing the unwinding speed. As the winding speed and take-up speed gradually balance, the tension of the metal wire returns to the corresponding value, preventing excessive tension. When the take-up speed is less than the take-up speed, the tension of the metal wire decreases. At this time, the semi-compressed main spring 8 gradually returns to its original state and pushes the slider 6 to move the swing guide wheel 7 away from the top block 10. Since the rebound force of the main spring 8 decreases, the force exerted by the top block 10 on the pressure sensor 18 is also smaller. At this time, the pressure sensor 18 detects that the pressure value is less than the set value and sends a signal to the matching PLC controller. The PLC controller reduces the rotation speed of the drive mechanism driving the take-up reel 2 according to the set program, thereby reducing the take-up speed and gradually balancing the take-up and take-up speeds, thus increasing the tension. In this way, the tension can be kept constant.

[0048] When the metal wire generates significant tension due to excessive winding speed, it exerts a squeezing effect on the oscillating guide wheel 7. This causes the oscillating guide wheel 7 to slide along the main guide rod 9 via the slider 6, compressing the main spring 8. At this point, due to elastic fatigue or damage to the main spring 8, it cannot effectively generate the corresponding elastic force to cause the top block 10 to squeeze the pressure sensor 18. Therefore, the slider 6 will continue to move until it touches the limit stop 22. At this time, the pressure sensing switch 24 is activated by the pressure, causing the air pump 21 to start its inflation function, inflating the piston cylinder 26. Thus, the piston slide 27 slides outward along the piston cylinder 26 under air pressure. The piston slide 27, along with the auxiliary spring 28, extends out of the piston cylinder 26. The auxiliary spring 28 abuts against the slider 6 through the docking block 29. During this process, the auxiliary spring 28 is compressed to generate a rebound force, which is convenient to react on the top block 10, so that the top block 10 can effectively squeeze the pressure sensor 18 again. When the pressure sensor 18 senses the corresponding value, it feeds back a control signal, which is convenient to adjust the speed of the drive mechanism driving the wire feeding reel 2. When the pressure sensor 18 senses the corresponding pressure value and feeds back, it also feeds back a control signal to close the solenoid valve 20 and stop the air pump 21, so that the piston cylinder 26 maintains the corresponding air pressure, that is, keeps the piston slider 27 in the corresponding position, effectively supporting the auxiliary spring 28 so that it can play its role.

[0049] The foregoing has described several embodiments of the present invention in detail, but these embodiments are not limited thereto and should not be considered as limiting the scope of the invention. All equivalent variations and improvements made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A wire feeding device for a tube stranding machine, comprising a main frame (1) and a wire feeding reel (2), wherein the wire feeding reel (2) is rotatably connected to one side of the main frame (1), and the main frame (1) is provided with a driving mechanism for driving the wire feeding reel (2) to rotate, wherein a wire-passing hole (3) is provided on the side of the main frame (1) away from the wire feeding reel (2), characterized in that, Also includes: Tension control device, the tension control device includes an elastic wire mechanism and a pressure sensor (18), the elastic wire mechanism is installed on the other side of the main frame (1), the pressure sensor (18) cooperates with the elastic wire mechanism, and the elastic wire mechanism is used to squeeze the pressure sensor (18), the pressure sensor (18) is also electrically connected to the drive mechanism; The elastic conductor mechanism includes a linear guide rail (4), a conductor slide, a main spring (8), a main guide rod (9), and a top block (10). The linear guide rail (4) is fixedly installed on the inner side of the main frame (1). The conductor slide is slidably connected to the linear guide rail (4). One end of the linear guide rail (4) is fixedly connected to a support plate (5). The main guide rod (9) is horizontally fixedly connected to the support plate (5). The pressure sensor (18) is installed on the support plate (5). The top block (10) is slidably connected to the main guide rod (9). The main spring (8) is connected between the conductor slide and the top block (10). The guide slide includes a slider (6) and a swing guide wheel (7). The slider (6) is slidably connected to the main rod (9), and the swing guide wheel (7) is rotatably connected to the slider (6). The elastic conductor mechanism also includes a temporary tension auxiliary mechanism, which includes an auxiliary spring (28), a piston pushing mechanism and a limit triggering mechanism. The piston pushing mechanism is set on the top block (10), and the auxiliary spring (28) is connected to the pushing end of the piston pushing mechanism. A mounting base (31) is fixedly connected inside the main frame (1). The limit triggering mechanism is installed on the mounting base (31). The limit triggering mechanism cooperates with the slider (6) and is also electrically connected to the piston pushing mechanism. The piston pushing mechanism includes a piston cylinder (26), a piston slide (27), and an air pump (21). The piston cylinder (26) is fixedly connected to the top block (10) on the side near the slider (6). The piston slide (27) is slidably connected inside the piston cylinder (26). The side of the piston slide (27) near the slider (6) is fixedly connected to an auxiliary spring (28). A docking block (29) is fixedly connected to one end of the auxiliary spring (28) near the slider (6). A secondary guide rod (30) is fixedly connected to the top block (10). The auxiliary guide rod (30) passes through the docking block (29) and the slider (6) in sequence. The air pump (21) is fixedly installed on the mounting base (31). A connecting air passage (25) is opened in the top block (10). A solenoid valve (20) is fixedly installed on the outer wall of the top block (10). The solenoid valve (20) is connected to the piston cylinder (26) through the connecting air passage (25). The air port end of the air pump (21) is connected to the solenoid valve (20). The air pump (21) and the solenoid valve (20) are both electrically connected to the pressure sensor (18). The limit triggering mechanism includes a limit block (22) and a pressure sensing switch (24). A connecting groove (23) is provided on the mounting base (31). The limit block (22) is slidably connected in the connecting groove (23), and a limit spring is connected between the limit block (22) and the connecting groove (23). The pressure sensing switch (24) is installed on the limit block (22), and the pressure sensing switch (24) is electrically connected to the air pump (21).

2. The wire-feeding device for a tube stranding machine according to claim 1, characterized in that, The main frame (1) is also equipped with a steering guide frame on the side near the elastic guide mechanism. The steering guide frame includes a fixed bracket (12), a guide wheel (13) and a limiting member. The fixed bracket (12) is fixedly connected to the main frame (1), the guide wheel (13) is rotatably connected to the fixed bracket (12), and the limiting member cooperates with the guide wheel (13).

3. The wire-feeding device for a tube stranding machine according to claim 2, characterized in that, The limiting component includes a wire clamp (11), which is rotatably connected to a fixed bracket (12), and two sets of wire clamps (11) are symmetrically distributed.

4. The wire-feeding device for a tube stranding machine according to claim 1, characterized in that, The support plate (5) is threaded with a safety screw (19) that mates with the top block (10).

5. The wire-feeding device for a tube stranding machine according to claim 1, characterized in that, The drive mechanism includes a servo motor (14), a transmission gear (15), an intermediate gear (16), and a linkage gear (17). The servo motor (14) is fixedly connected to the bottom of the main frame (1) and is electrically connected to the pressure sensor (18). The transmission gear (15) is fixedly connected to the spindle end of the servo motor (14). The linkage gear (17) is coaxially connected to the wire feeding reel (2). The intermediate gear (16) is rotatably connected to the main frame (1) and meshes between the transmission gear (15) and the linkage gear (17).

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