Pay-off device for tubular strander

Abstract

The invention discloses a pay-off device for a tubular strander, and relates to the technical field of tubular strander pay-off, the pay-off device comprises a main frame and a pay-off reel, the pay-off reel is rotatably connected to one side of the main frame, the main frame is provided with a driving mechanism for driving the pay-off reel to rotate, and the pay-off device further comprises a tension control device, the tension control device comprises an elastic wire guiding mechanism and a pressure sensor. When the pay-off speed is larger than or smaller than the take-up speed, a metal wire body can compress or release the main spring when passing through the swing guide wheel, the main spring generates certain acting force on the pressure sensor through the ejector block, and therefore the pay-off and take-up speed can be adjusted and balanced in time according to signals fed back by the pressure sensor; therefore, the tension of the metal wire body is kept constant.

Description

Technical Field

[0001] The invention relates to the technical field of tubular stranding machine pay-off, and in particular to a pay-off device for a tubular stranding machine. Background Art

[0002] Tubular stranding machine is a tubular stranding machine. It is widely used in the fields of wire and cable, communication, data transmission, etc. It is an indispensable production equipment in these industries. It mainly completes the stranding function of metal wire through the rotational motion of the tubular rotor.

[0003] When the existing tubular stranding machine is performing the metal wire stranding operation, the metal wire is released through a wire-releasing device arranged at one end. Since the metal wire needs to be continuously released, a wire-receiving device must be arranged at the other end to pull the metal wire, so as to facilitate the metal wire to be continuously stranded through the stranding position.

[0004] The disadvantage of the existing tubular stranding machine is that when the tubular stranding machine processes metal wires with smaller diameters, the tension required for production is very small. Due to the inherent properties of the mechanical structure, the mechanical damping cannot meet the small tension. Even if the speed of the drive motor for paying out the wire and the drive motor for taking up the wire are set to be the same at the beginning, the irregular arrangement of the metal wires on the wire drum easily causes fluctuations in the pay-out speed, which can easily lead to excessive or insufficient tension of the metal wires, which is not stable enough, and thus easily affects the quality of the stranded products. Summary of the invention

[0005] The purpose of the present invention is to provide a wire-paying device for a tubular stranding machine, so as to solve the technical problem in the prior art that during the wire-paying process of the tubular stranding machine, it is difficult to maintain stable tension of the wire body due to the irregular arrangement of the metal wire on the wire reel and the inherent properties of the mechanical structure, thus affecting the product production quality.

[0006] The technical problem to be solved by the present invention can be achieved by the following technical solutions:

[0007] A wire-paying device for a tubular stranding machine comprises a main frame and a wire-paying drum, wherein the wire-paying drum is rotatably connected to one side of the main frame, a driving mechanism for driving the wire-paying drum to rotate is arranged on the main frame, a wire-passing hole is arranged on one side of the main frame away from the wire-paying drum, and further comprises:

[0008] The 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 squeeze the pressure sensor. The pressure sensor is also electrically connected to the driving mechanism.

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

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

[0011] As a further solution of the present invention: a steering wire rack is also installed on one side of the main frame close to the elastic wire mechanism, and the steering wire rack includes a fixed bracket, a wire wheel and a limiter. The fixed bracket is fixedly connected to the main frame, the wire wheel is rotatably connected to the fixed bracket, and the limiter cooperates with the wire wheel.

[0012] As a further solution of the present invention: the position limiting member comprises a wire clamping column, the wire clamping column is rotatably connected to the fixed bracket, and the wire clamping column is symmetrically distributed in two groups.

[0013] As a further solution of the present invention: the elastic wire mechanism also includes a temporary tension auxiliary mechanism, the temporary tension auxiliary mechanism includes an auxiliary spring, a piston pushing mechanism and a limit trigger mechanism, the piston pushing mechanism is arranged on the top block, the auxiliary spring is cooperated and connected to the pushing end of the piston pushing mechanism, a mounting seat is fixedly connected in the main frame, the limit trigger mechanism is installed on the mounting seat, the limit trigger mechanism cooperates with the slider, and the limit trigger mechanism is also electrically connected to the piston pushing mechanism.

[0014] As a further solution 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 a side of the top block close to the slider, the piston slide is slidably connected in the piston cylinder, the side of the piston slide close to the slider is fixedly connected to an auxiliary spring, the end of the auxiliary spring close to the slider is fixedly connected to a docking block, the top block is fixedly connected to a secondary guide rod, and the secondary guide rod passes through the docking block and the slider in sequence, the air pump is fixedly installed on the mounting seat, a connecting air channel is opened in 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 channel, the air port end of the air pump is connected to the electromagnetic valve, and the air pump and the electromagnetic valve are both electrically connected to a pressure sensor.

[0015] As a further solution of the present invention: the limit trigger mechanism includes a limit block and a pressure sensing switch, the mounting seat 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 solution of the present invention: a safety screw matching with the top block is threadedly connected to the support plate.

[0017] As a further solution 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 the servo motor 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 pay-off reel, the intermediate gear is rotatably connected to the main frame, and the intermediate gear is meshed between the transmission gear and the linkage gear.

[0018] Beneficial effects of the present invention:

[0019] 1. When the pay-out speed of the present invention is lower than the take-up speed, the metal wire will compress the main spring when passing through the swinging guide wheel, and the main spring will increase the force of the top block on the pressure sensor, and the pressure sensor will feedback a signal, and the speed of the pay-out reel will be increased by relying on the PLC control. When the pay-out speed is higher than the take-up speed, the main spring will be released, resulting in a decrease in the force of the top block on the pressure sensor, and the pressure sensor will feedback a signal, and the speed of the pay-out reel will be reduced by relying on the PLC control. That is, the tension of the metal wire is fed back in real time through the main spring, the swinging guide wheel, the top block and the pressure sensor, so that the balance of the pay-out speed and the take-up speed can be adjusted in time, thereby facilitating the maintenance of a constant tension of the metal wire.

[0020] 2. When the swing guide wheel of the present invention compresses or releases the main spring for a long time, causing elastic fatigue or damage of the main spring, the swing guide wheel will easily continue to move along the compression direction of the main spring under the traction of the metal wire. In this process, the swing guide wheel can be limited by the set limit block, and the pressure sensing switch on the limit block enables the air pump to operate, relying on the air pressure to act on the piston slide in the piston cylinder, thereby pushing the spare auxiliary spring out to contact the slider connected to the swing guide wheel. In this way, the swing guide wheel can temporarily rely on the elastic force of the auxiliary spring to maintain a certain tension, avoid the metal wire from being broken, and at the same time provide a certain maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

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

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

[0024] Figure 3 It is a schematic diagram of the structure of the metal wire body passing through the wire wheel, the swing guide wheel and the wire hole in the present invention;

[0025] Figure 4 It is a structural schematic diagram of the servo motor and the pay-off drum in the present invention;

[0026] Figure 5 It is a structural schematic diagram of the wire clamping column in the present invention;

[0027] Figure 6 It is a top view structural schematic diagram of the relative position distribution of the slider, the swing guide wheel, the top block and the pressure sensor in the present invention;

[0028] Figure 7 yes Figure 6 A schematic diagram of the enlarged structure at B in the middle;

[0029] Figure 8 This is a top view of the structure of the auxiliary spring in the present invention, which is connected with the slider and the top block.

[0030] In the figure: 1. main frame; 2. wire pay-off reel; 3. wire hole; 4. linear guide; 5. support plate; 6. slider; 7. swing guide wheel; 8. main spring; 9. main rod; 10. top block; 11. wire clamping column; 12. fixed bracket; 13. wire pulley; 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 block; 23. connecting slide; 24. pressure sensing switch; 25. connecting airway; 26. piston cylinder; 27. piston slide; 28. auxiliary spring; 29. ​​docking block; 30. auxiliary guide rod; 31. mounting seat. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figure 1-Figure 8As shown, a wire-paying device for a tubular stranding machine comprises a main frame 1 and a wire-paying drum 2, the wire-paying drum 2 is rotatably connected to one side of the main frame 1 via a rotating shaft, a metal wire to be twisted is wound on the wire-paying drum 2, a driving mechanism for driving the wire-paying drum 2 to rotate is arranged on the main frame 1, a wire-passing hole 3 for passing the metal wire is opened on one side of the main frame 1 away from the wire-paying drum 2, and the passed metal wire is connected to a wire-taking mechanism, and the metal wire is moved by the combined action of wire-paying and wire-taking, and the device also comprises a tension control device; the tension control device comprises 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 driving mechanism. The metal wire released from the wire reel 2 bypasses the elastic wire mechanism and passes through the wire hole 3. When the metal wire of the wire reel is arranged irregularly or the inherent properties of some mechanical structures cause the wire release speed to be lower than the wire take-up speed, the metal wire is tightened and the tension is large. When passing through the elastic wire mechanism, a large squeezing force is generated on the elastic wire mechanism, and the elastic wire mechanism The structure will generate a large force on the pressure sensor 18. When the pressure sensor 18 detects that the pressure value exceeds the corresponding value, it will feedback the signal to the PLC controller. The PLC controller increases the rotation speed of the drive mechanism to drive the pay-off reel 2 according to the set program, so that the pay-off speed is increased, and then the pay-off speed and the take-up speed are slowly balanced. The elastic wire mechanism relies on the rebound force to push back the metal wire body, and the tension of the metal wire body is restored to the corresponding value to avoid excessive tension. When the pay-off speed is greater than the take-up speed, the tension of the metal wire body will decrease, and when it passes through the elastic wire mechanism, it squeezes the elastic wire mechanism. The force is small, resulting in a small 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 it will feedback the signal to the matching PLC controller. The PLC controller reduces the rotation speed of the drive mechanism driving the pay-off reel 2 according to the set program, thereby reducing the pay-off speed, gradually balancing the speed of pay-off and take-up, thereby increasing the tension. In this way, it is possible to maintain a stable tension, that is, the elastic wire mechanism and the pressure sensor 18 cooperate with each other to detect and feedback the tension of the metal wire during the pay-off process, so as to make timely adjustments according to the situation.

[0033] In some specific embodiments, such as Figure 2As shown, the elastic wire mechanism includes a linear guide rail 4, a wire slide, a main spring 8, a main rod 9 and a top block 10. The linear guide rail 4 is fixedly arranged on the inner side of the main frame 1, and two are symmetrically distributed. The wire 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 rod 9 is horizontally fixedly connected to the support plate 5, and two main rods 9 are symmetrically distributed. The main rod 9 is parallel to the linear guide rail 4. The pressure sensor 18 is installed on the support plate 5. The top block 10 is slidably connected to the main rod 9. The main rod 9 passes through A top block 10 is provided, and a main spring 8 is connected between the wire slide and the top block 10, and the main spring 8 is also covered with a main 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, and can be further compressed when the tension increases, and the pressure sensor 18 is detected and fed back through the squeezing action of the top block 10. When the tension becomes smaller, the main spring 8 releases its rebound force to push the wire slide, and the wire slide holds the metal wire to prevent it from loosening and falling off. In this process, the force of the top block 10 on the pressure sensor 18 becomes smaller.

[0034] Among them, the wire slide includes a slider 6 and a swing guide wheel 7. The slider 6 is slidably connected to the main rod 9. The main rod 9 runs through the slider 6, and the end of the main rod 9 away from the support plate 5 is threadedly connected with a limiting nut to prevent the slider 6 from falling off. The swing guide wheel 7 is rotatably connected to the slider 6 through a rotating shaft.

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

[0036] like Figure 5 As shown, the limiting member includes a clamping column 11, which is rotatably connected to a fixed bracket 12, and the clamping column 11 is symmetrically distributed in two groups.

[0037] like Figure 3 As shown, when the metal wire is released from the pay-off drum 2, it first passes between the two clamping posts 11, then goes around the guide wheel 13, and goes around to the swing guide wheel 7, and finally passes through the wire hole 3, so that the metal wire is conveniently acted upon by the swing guide wheel 7 and the main spring 8.

[0038] In some specific implementation schemes, if the main spring 8 is deformed for a long time and produces elastic fatigue, resulting in reduced elasticity, the top block 10 will not be able to effectively squeeze the pressure sensor 18. At this time, even if the winding speed is greater than the unwinding speed, resulting in excessive tension of the metal wire, the swing guide wheel 7 only produces a large displacement under the squeezing action of the metal wire, but the actual force on the top block 10 does not reach the corresponding size. At this time, the pressure sensor 18 cannot detect the corresponding force, and thus cannot feedback control the drive mechanism. In order to solve this problem, a temporary tension auxiliary mechanism is set. The elastic wire mechanism also includes a temporary tension auxiliary mechanism. The temporary tension auxiliary mechanism includes an auxiliary spring 28, a piston pushing mechanism and a limit trigger mechanism. The piston pushing mechanism is arranged on the top block 10, and the auxiliary spring 28 is connected to the pushing end of the piston pushing mechanism. A mounting seat 31 is fixedly connected to the main frame 1, and the mounting seat 31 is located below the linear guide rail 4. The guide rail 4 is fixedly connected to the main frame 1 through the mounting seat 31, and the limit trigger mechanism is installed on the mounting seat 31. The limit trigger mechanism cooperates with the slider 6, and the limit trigger mechanism is also electrically connected to the piston pushing mechanism. When the metal wire generates a large tension due to the excessive winding speed, it produces an extrusion effect on the swing guide wheel 7, causing the swing guide wheel 7 to slide along the main rod 9 by relying on the slider 6 to compress the main spring 8. At this time, due to the elastic fatigue or damage of the main spring 8, it is impossible to effectively generate the corresponding elastic force to make the top block 10 squeeze the pressure sensor 18, so the slider 6 will continue to move until it hits the limit trigger mechanism, and then the limit trigger mechanism will start the piston pushing mechanism, and the piston pushing mechanism will drive the auxiliary spring 28 to move and hit the slider 6, pushing the top to reset. In this process, the auxiliary spring 28 will be compressed to generate a rebound force, which is convenient for relying on the piston pushing mechanism to react to the top block 10, so that the pressure sensor 18 is subjected to a corresponding pressure.

[0039] Among them, 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 side of the top block 10 close to the slider 6. The piston slide 27 is slidably connected in the piston cylinder 26. The side of the piston slide 27 close to the slider 6 is fixedly connected to the auxiliary spring 28. The end of the auxiliary spring 28 close to the slider 6 is fixedly connected to the docking block 29. The top block 10 is fixedly connected to a secondary guide rod 30, and the secondary guide rod 30 passes through the docking block 29 and the slider 6 in sequence. The slider 6 can be simultaneously relative to the main rod 9 and the secondary guide rod 30. 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 seat 31. A connecting airway 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 airway 25. The air pump 21 is a dual-function pump, which can both inhale and inflate. The air port end of the air pump 21 is connected to the solenoid valve 20 through a pipeline. The solenoid valve 20 is in an open state under normal circumstances. The air pump 21 and the solenoid valve 20 are both electrically connected to the pressure sensor 18.

[0040] Among them, the limit trigger mechanism includes a limit block 22 and a pressure sensing switch 24, a connecting groove 23 is opened on the mounting seat 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 the pressure sensing switch 24 is electrically connected to the air pump 21.

[0041] When the metal wire generates a large tension due to the excessive speed of winding, it squeezes the swing guide wheel 7, causing the swing guide wheel 7 to slide along the main rod 9 by relying on the slider 6 to compress the main spring 8. 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, so the slider 6 will continue to move until it hits the limit stopper 22. Figure 8 As shown, at this time, the pressure sensing switch 24 is squeezed and induced, so that the air pump 21 starts the inflation function and inflates the piston cylinder 26. In this way, the piston slide 27 slides outward along the piston cylinder 26 under the action of air pressure, and the piston slide 27 extends out of the piston cylinder 26 with the auxiliary spring 28, and the auxiliary spring 28 contacts the slider 6 through the docking block 29. In this process, the auxiliary spring 28 is compressed to generate a rebound force, which is convenient for reacting to the top block 10, so that the top block 10 can effectively squeeze the pressure sensor 18 again. Figure 8After the auxiliary spring 28 in the assembly extends out and contacts the docking block 29, it is in a compressed state. In this way, when the pressure sensor 18 senses the corresponding value, it feeds back a control signal, thereby facilitating the adjustment of the speed at which the drive mechanism drives the pay-off 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 at the same time, so that the corresponding air pressure is maintained inside the piston cylinder 26, that is, the piston slide 27 is maintained in the corresponding position, effectively supporting the auxiliary spring 28 and facilitating its function.

[0042] In some specific embodiments, a safety screw 19 that cooperates with the top block 10 is threadedly connected to the support plate 5. 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 reminding the staff, an alarm electrically connected to the pressure sensing switch 24 may also be provided.

[0044] In some specific embodiments, such as Figure 4 As shown, the driving 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 the servo motor 14 is electrically connected to the pressure sensor 18 through the PLC controller. The transmission gear 15 is fixedly connected to the main shaft end of the servo motor 14, the linkage gear 17 is coaxially connected to the pay-off reel 2, and the intermediate gear 16 is rotatably connected to the main frame 1 through a rotating shaft, and the intermediate gear 16 is meshed between the transmission gear 15 and the linkage gear 17. When the servo motor 14 is started, it drives the pay-off reel 2 to rotate through the transmission gear 15, the intermediate gear 16 and the linkage gear 17, and when the pressure sensor 18 feeds back a signal to the PLC controller, the PLC controller controls the servo motor 14 to speed up or slow down.

[0045] In order to facilitate the understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution is briefly described in combination with specific application scenarios:

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

[0047] When the swing guide wheel 7 is in normal working state, 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 wire-reeling speed is greater than the wire-releasing speed, the metal wire body is further tightened, and the tension is greater, which produces an extrusion effect on the swing guide wheel 7, causing the swing guide wheel 7 to slide along the main rod 9 by relying on the slider 6 to compress the main spring 8. The rebound force generated by the compression of the main spring 8 reacts 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, and the PLC controller increases the rotation speed of the drive mechanism to drive the wire-releasing drum 2 according to the set program, so that the wire-releasing speed is increased, and then the wire-releasing speed is increased. The degree and the take-up speed are slowly balanced, and the tension of the metal wire body returns to the corresponding value to avoid excessive tension. When the take-up speed is lower than the pay-out speed, the tension of the metal wire body decreases. At this time, the semi-compressed main spring 8 gradually recovers and pushes the slider 6 to drive the swing guide wheel 7 away from the top block 10. Since the rebound force of the main spring 8 decreases, the force of the top block 10 on the pressure sensor 18 is smaller. At this time, the pressure sensor 18 detects that the pressure value is lower than the set value, and it will feedback the signal to the matching PLC controller. The PLC controller reduces the rotation speed of the pay-off reel 2 driven by the drive mechanism according to the set program, thereby reducing the pay-out speed and gradually balancing the pay-out and take-up speeds, thereby increasing the tension, so that the tension can be kept constant.

[0048] When the metal wire generates a large tension due to the excessive speed of winding, it squeezes the swing guide wheel 7, causing the swing guide wheel 7 to slide along the main rod 9 by relying on the slider 6 to compress the main spring 8. At this time, due to the 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, so the slider 6 will continue to move until it hits the limit stopper 22. At this time, the pressure sensing switch 24 is squeezed and sensed, causing the air pump 21 to start the inflation function and inflate the piston cylinder 26. In this way, the piston slide 27 slides outward along the piston cylinder 26 under the action of air pressure, and the piston slide 27 extends out of the piston cylinder 26 with the auxiliary spring 28, and the auxiliary spring 28 extends out of the piston cylinder 26. The auxiliary spring 28 contacts 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 for reacting to the top block 10, so that the top block 10 can effectively squeeze the pressure sensor 18 again. In this way, when the pressure sensor 18 senses the corresponding value, it will feedback the control signal, so as to facilitate the adjustment of the speed of the drive mechanism to drive the pay-off reel 2, and when the pressure sensor 18 senses the corresponding pressure value and feedbacks, it also feedbacks the control signal to close the solenoid valve 20 and stop the air pump 21 at the same time, so that the corresponding air pressure is maintained inside the piston cylinder 26, that is, the piston slide 27 is maintained in the corresponding position, and the auxiliary spring 28 is effectively supported to facilitate its function.

[0049] Several embodiments of the present invention are described in detail above, but the embodiments of the present invention are not limited thereto and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A wire pay-off device for a tubular stranding machine, comprising a main frame (1) and a wire pay-off drum (2), wherein the wire pay-off drum (2) is rotatably connected to one side of the main frame (1), and a driving mechanism for driving the wire pay-off drum (2) to rotate is provided on the main frame (1), and a wire passing hole (3) is provided on a side of the main frame (1) away from the wire pay-off drum (2), characterized in that: Also includes: A tension control device, the tension control device comprising an elastic wire mechanism and a pressure sensor (18), the elastic wire mechanism being mounted on the other side of the main frame (1), the pressure sensor (18) being matched with the elastic wire mechanism, and the elastic wire mechanism being used to squeeze the pressure sensor (18), and the pressure sensor (18) being also electrically connected to the driving mechanism.

2. A wire pay-off device for a tubular stranding machine according to claim 1, characterized in that: The elastic wire mechanism comprises a linear guide rail (4), a wire slide, a main spring (8), a main rod (9) and a top block (10); the linear guide rail (4) is fixedly arranged on the inner side of the main frame (1); the wire 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 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 rod (9); and the main spring (8) is connected between the wire slide and the top block (10).

3. A wire pay-off device for a tubular stranding machine according to claim 2, characterized in that: The wire slide comprises a slider (6) and a swing guide wheel (7); the slider (6) is slidably connected to the main guide rod (9); and the swing guide wheel (7) is rotatably connected to the slider (6).

4. A wire pay-off device for a tubular stranding machine according to claim 1, characterized in that: A steering wire frame is also installed on one side of the main frame (1) close to the elastic wire mechanism, and the steering wire frame comprises a fixed bracket (12), a wire wheel (13) and a limiter, the fixed bracket (12) is fixedly connected to the main frame (1), the wire wheel (13) is rotatably connected to the fixed bracket (12), and the limiter cooperates with the wire wheel (13).

5. A wire pay-off device for a tubular stranding machine according to claim 4, characterized in that: The limiting member comprises a wire clamping column (11), the wire clamping column (11) is rotatably connected to a fixed bracket (12), and the wire clamping column (11) is symmetrically distributed in two groups.

6. A wire pay-off device for a tubular stranding machine according to claim 3, characterized in that: The elastic wire mechanism also includes a temporary tension auxiliary mechanism, which includes an auxiliary spring (28), a piston pushing mechanism and a limit trigger mechanism. The piston pushing mechanism is arranged on the top block (10), and the auxiliary spring (28) is connected to the pushing end of the piston pushing mechanism. A mounting seat (31) is fixedly connected inside the main frame (1), and the limit trigger mechanism is installed on the mounting seat (31). The limit trigger mechanism cooperates with the slider (6), and the limit trigger mechanism is also electrically connected to the piston pushing mechanism.

7. A wire pay-off device for a tubular stranding machine according to claim 6, characterized in that: The piston pushing mechanism comprises a piston cylinder (26), a piston slide (27) and an air pump (21); the piston cylinder (26) is fixedly connected to a side of the top block (10) close to the slider (6); the piston slide (27) is slidably connected in the piston cylinder (26); the side of the piston slide (27) close to the slider (6) is fixedly connected to an auxiliary spring (28); one end of the auxiliary spring (28) close to the slider (6) is fixedly connected to a docking block (29); and the top block (10) is fixedly connected to a secondary guide rod (30). , and the secondary guide rod (30) passes through the docking block (29) and the slider (6) in sequence, the air pump (21) is fixedly mounted on the mounting seat (31), a communicating air passage (25) is provided in the top block (10), an electromagnetic valve (20) is fixedly mounted on the outer wall of the top block (10), the electromagnetic valve (20) is connected to the piston cylinder (26) through the communicating air passage (25), the air port end of the air pump (21) is connected to the electromagnetic valve (20), and the air pump (21) and the electromagnetic valve (20) are both electrically connected to the pressure sensor (18).

8. A wire pay-off device for a tubular stranding machine according to claim 7, characterized in that: The limit trigger mechanism comprises a limit block (22) and a pressure sensing switch (24); a connecting slide groove (23) is provided on the mounting seat (31); the limit block (22) is slidably connected in the connecting slide groove (23); a limit spring is connected between the limit block (22) and the connecting slide groove (23); the pressure sensing switch (24) is mounted on the limit block (22); and the pressure sensing switch (24) is electrically connected to the air pump (21).

9. A wire pay-off device for a tubular stranding machine according to claim 3, characterized in that: The support plate (5) is threadedly connected with a safety screw (19) that matches the top block (10).

10. A wire pay-off device for a tubular stranding machine according to claim 1, characterized in that: The driving mechanism comprises 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 the servo motor (14) is electrically connected to a pressure sensor (18); the transmission gear (15) is fixedly connected to the main shaft 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), and the intermediate gear (16) is meshed between the transmission gear (15) and the linkage gear (17).

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