A cord constant tension pay-off device

Abstract

The present invention relates to the technical field of wire-paying devices, and in particular to a cord constant tension wire-paying device, comprising a roller frame and a core rod fixed inside, the outer side of the core rod being detachably rotatably connected with a wire-paying roller, one end of the wire-paying roller being fixed with a damping plate 1, and one end of the core rod being movably provided with a damping plate 2, and further comprising: a tension sensing mechanism and a tension holding mechanism for adjusting the damping in real time according to the tension. The present invention can detect the tension of the steel wire in real time through the tension sensing mechanism, and as the diameter of the wire wheel gradually decreases, the tension of the steel wire increases, and the damping of the wire-paying roller is reduced through the tension holding mechanism, and after the damping of the wire-paying roller is reduced, the tension of the steel wire can be reduced to restore to the original tension, so that the tension of the steel wire also fluctuates up and down within a very small range, so that the tension of the steel wire is always close to the specified value, and large fluctuations in the tension of the steel wire are avoided, thereby ensuring that the tension of the steel wire is kept constant during wire-paying.

Description

Technical Field

[0001] The invention relates to the technical field of wire-paying devices, in particular to a cord constant-tension wire-paying device. Background Art

[0002] During the production and twisting process of steel cord, the core wire and the surface wire need to be paid out simultaneously, and then the core wire and the surface wire are twisted through twisting equipment to form a multi-layer steel cord. The core wire and the surface wire are usually steel wires. In order to ensure the quality of the steel cord, the core wire and the surface wire need to maintain a constant tension when paying out, so that the equal tightening force can be maintained at each section between the core wire and the surface wire.

[0003] As the steel wire on the outside of the pay-off roller is continuously released, the diameter of the wire roll will gradually decrease, while the damping of the pay-off roller remains unchanged. Therefore, the steel wire with reduced diameter requires greater pulling force to overcome the damping of the pay-off roller, which causes the tension of the steel wire to gradually increase, resulting in uneven tightening force between the core wire and the surface wire of the multi-layer steel cord, reducing the twisting quality of the steel cord.

[0004] After searching, a Chinese patent with publication number: CN221295731U discloses a constant tension pay-off device, including: a fixed frame and a pay-off, wherein two magnetic tensioners corresponding to the two pay-off shafts are installed on the fixed frame, respectively, for controlling the pay-off tension of the pay-off shafts, and the two magnetic tensioners are provided with adjustment gears for adjusting their own damping force; a tension adjuster is arranged on the fixed frame, and the detection end of the tension adjuster can detect the wheel diameter of the pay-off wheel in real time, and according to the real-time wheel diameter, drive the adjustment gear to rotate through the output end, thereby adjusting the self-damping force of the magnetic tensioner, and finally make the pay-off tension of the pay-off wheel always keep balanced, and the output end of the tension adjuster can synchronously drive the adjustment gears of the two magnetic tensioners to rotate and adjust, and adjust the self-damping force of the two magnetic tensioners to be completely consistent, thereby making the pay-off tension of the two pay-off wheels always consistent.

[0005] Based on the above search and combined with actual problems, it was found that: the device detects the change in the wheel diameter of the pay-off wheel and adjusts the damping of the magnetic tensioner to adjust the tension of the steel wire. However, this method adjusts the damping by detecting the wheel diameter of the pay-off wheel instead of directly detecting the tension of the steel wire. In actual use, the rate of change of the damping adjustment of the steel wire and the rate of change of the tension exerted on the steel wire are not completely equal, so the damping adjustment is not accurate, and the tension exerted on the steel wire will still increase or decrease to a certain extent, resulting in the tension of the steel wire being not constant when the wire is paid off. Therefore, there will still be large errors in actual use. Summary of the invention

[0006] The object of the present invention is to provide a cord constant tension pay-off device to solve the problems raised in the above background technology.

[0007] The technical solution of the present invention is: a cord constant tension pay-off device, comprising a roller frame and a core rod fixed inside the core rod, the outer side of the core rod is detachably connected to a pay-off roller, one end of the pay-off roller is fixed with a damping plate 1, and one end of the core rod is movably provided with a damping plate 2, and also includes: a tension sensing mechanism and a tension maintaining mechanism for adjusting the damping in real time according to the tension; the tension sensing mechanism comprises a shell, two guide cylinders are slidably inserted on one side of the upper end of the shell, the lower ends of the two guide cylinders are elastically connected to the lower end of the inner side of the shell through an induction spring, and the upper ends of the two guide cylinders are rotatably provided with a detection roller; the tension maintaining mechanism comprises a cylinder 1 movably arranged on one side of the shell through a calibration mechanism and a cylinder fixed to one end of the roller frame. Cylinder 2, a piston is slidably connected to the inner side of cylinder 2, an adjusting mechanism for adjusting the pressure of damping plate 2 is arranged between the piston and the core rod, a rotating disk is rotatably arranged on the inner side of cylinder 1, a variable speed drive mechanism is arranged between the rotating disk, the shell and the guide cylinder; an air guide mechanism is also arranged; the air guide mechanism comprises two air guide pipes connected to one side of cylinder 1, two exhaust ports opened on the upper and lower sides of cylinder 1, two air inlets opened on the other side of cylinder 1, two exhaust flow channels and one inlet flow channel opened inside the rotating disk, the two exhaust flow channels are symmetrically distributed on both sides of the inlet flow channel, one end of the two air guide pipes are respectively connected to the two end spaces of cylinder 2, and an air source device is arranged on the outside of the two air inlets.

[0008] Preferably, the adjusting mechanism includes a worm wheel rotatably connected to one end of the outer side of the core rod and a worm screw rotatably connected to one end of the roller frame, the worm screw is meshed with the worm wheel, an external threaded cylinder is fixed to one end of the worm wheel, the outer side of the external threaded cylinder is threadedly connected to an internal threaded cylinder, a pressing plate is fixed to one end of the internal threaded cylinder, a plurality of pressing cylinders are fixed to one end of the pressing plate, a pressure rod which passes through one end of the roller frame is slidably inserted at one end of each of the pressing cylinders, one end of each of the pressure rods is fixedly connected to one side of the damping plate 2, each of the pressing cylinders is elastically connected to each pressure rod through a pressure spring, and a transmission mechanism is arranged between the worm screw and the piston.

[0009] Preferably, the transmission mechanism includes two piston rods fixed on both sides of the piston and a gear fixed on one end of the worm, a rack is fixed between the ends of the two piston rods, and the rack is meshed with the gear through teeth.

[0010] Preferably, the gas source device includes a gas tank, an air pump and a gas collecting shell fixed to the outside of the cylinder and connected to two air inlets, the gas outlet end of the air pump is connected to the interior of the gas tank, and the gas outlet end of the gas tank is connected to the interior of the gas collecting shell through an air inlet pipe.

[0011] Preferably, the speed change drive mechanism includes a first sliding pin rotatably connected between the two guide cylinders, two sliding columns slidably connected to one side of the shell, an extension shaft fixed to one end of the rotating disk, and a transmission lever rotatably arranged on the inner side of the shell, a steering rod slidably connected to the interior of the extension shaft, a second sliding groove is provided at one end of the steering rod, a third sliding pin is rotatably connected between the two sliding columns, two first sliding grooves are provided at both ends of the transmission lever, the first sliding pin and the third sliding pin are respectively slidably connected to the inner sides of the two first sliding grooves, a second sliding pin located on the outer side of the shell is rotatably connected between the two sliding columns, and the second sliding pin is slidably connected to the inner side of the second sliding groove.

[0012] Preferably, the transmission lever is rotatably connected to the inner side of the housing via a support rod, and the distance between the support rod and the first sliding pin is smaller than the distance between the support rod and the third sliding pin.

[0013] Preferably, the calibration mechanism includes a threaded slider fixed on the outside of the cylinder, a screw rotatably connected to the outside of the shell, and a vertical rod fixed on the outside of the shell, the screw is threadably connected to the inside of the threaded slider, and the vertical rod is slidably inserted into the inside of the threaded slider.

[0014] Preferably, guide rods are slidably inserted into the lower ends of the two guide cylinders, and the lower ends of the two guide rods are fixedly connected to the inner bottom end of the shell.

[0015] Preferably, it also includes a base plate placed on the ground, the roller frame and the shell are fixed on the upper side of the base plate, four side plates are fixed on the upper side of the base plate at both sides of the detection roller, and the upper ends of the two side plates on the same side are rotatably connected to guide rollers.

[0016] The present invention provides a cord constant tension pay-off device by improvement, which has the following improvements and advantages compared with the prior art:

[0017] First, the present invention can detect the tension of the steel wire in real time through the tension sensing mechanism. As the diameter of the wire wheel gradually decreases, the tension of the steel wire increases, and the pressure between the damping plate 1 and the damping plate 2 is reduced through the tension maintaining mechanism, thereby reducing the friction between the damping plate 1 and the damping plate 2, thereby reducing the damping of the pay-off roller. After the damping of the pay-off roller is reduced, the tension of the steel wire can be reduced to restore to the original tension, and the tension of the steel wire can also fluctuate up and down within a very small range, so that the tension of the steel wire is always close to the specified value, avoiding large fluctuations in the tension of the steel wire, thereby ensuring that the tension of the steel wire is constant during pay-off, and improving the twisting quality of the steel cord.

[0018] Secondly: the present invention adjusts the self-locking effect between the worm wheel and the worm in the mechanism, and the worm wheel will not change after being adjusted to a specified angle. Therefore, the pressure between the damping plate 1 and the damping plate 2 can be kept stable, thereby ensuring the stability of the friction force between the damping plate 1 and the damping plate 2, further ensuring the damping stability of the pay-off roller, thereby further avoiding large fluctuations in the wire tension. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the adjustment mechanism and the transmission mechanism in the present invention;

[0022] Figure 3 It is a first cross-sectional structural schematic diagram of the present invention;

[0023] Figure 4 It is a second cross-sectional structural schematic diagram of the present invention;

[0024] Figure 5 For the present invention Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0025] Figure 6 For the present invention Figure 4 A schematic diagram of the enlarged structure at B in the middle;

[0026] Figure 7 For the present invention Figure 1 Schematic diagram of the enlarged structure at C in the middle;

[0027] Figure 8 It is a schematic diagram of the structure after the rotating disk in the present invention rotates.

[0028] Reference numerals:

[0029] 1. Roller frame; 2. Core rod; 3. Pay-off roller; 4. Damping plate 1; 5. Damping plate 2; 6. Bottom plate; 7. Side plate; 8. Guide roller; 101. Shell; 102. Guide cylinder; 103. Detection roller; 104. Guide rod; 105. Induction spring; 201. Cylinder 1; 202. Cylinder 2; 203. Piston rod; 204. Piston; 205. Rotating plate; 206. Intake channel; 207. Exhaust channel; 208. Air guide pipe; 209. Exhaust port; 210. Intake port; 211. Gas collecting shell; 212. Intake pipe; 213. Gas tank; 214. 4. Air pump; 301. Rack; 302. Worm gear; 303. Worm; 304. Pressure rod; 305. External threaded cylinder; 306. Internal threaded cylinder; 307. Pressing plate; 308. Pressing cylinder; 309. Pressure spring; 310. Gear; 401. Sliding column; 402. First sliding pin; 403. Support rod; 404. Transmission lever; 405. First sliding groove; 406. Second sliding pin; 407. Extension shaft; 408. Steering rod; 409. Second sliding groove; 410. Third sliding pin; 501. Threaded slider; 502. Screw; 503. Vertical rod. DETAILED DESCRIPTION

[0030] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. 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.

[0031] The present invention provides a cord constant tension pay-off device through improvement. The technical solution of the present invention is:

[0032] like Figures 1 to 8 As shown, an embodiment of the present invention provides a cord constant tension pay-off device, comprising a roller frame 1 and a core rod 2 fixed inside the roller frame 1, a pay-off roller 3 is detachably and rotatably connected to the outer side of the core rod 2, a damping plate 1 4 is fixed to one end of the pay-off roller 3, and a damping plate 2 5 is movably provided at one end of the core rod 2, and further comprising: a tension sensing mechanism and a tension holding mechanism for adjusting the damping in real time according to the tension; the tension sensing mechanism comprises a shell 101, two guide cylinders 102 are slidably inserted on one side of the upper end of the shell 101, and the lower ends of the two guide cylinders 102 are elastically connected to the lower end of the inner side of the shell 101 through a sensing spring 105 (such as Figure 5As shown), and the upper ends of the two guide cylinders 102 are rotatably provided with detection rollers 103; the tension holding mechanism includes a cylinder 1 201 movably provided on one side of the shell 101 through a calibration mechanism and a cylinder 2 202 fixed on one end of the roller frame 1, a piston 204 is slidably connected to the inner side of the cylinder 202, and an adjustment mechanism for adjusting the pressure of the damping plate 2 5 is provided between the piston 204 and the core rod 2, a rotating disk 205 is rotatably provided on the inner side of the cylinder 1 201, and a variable speed drive mechanism is provided between the rotating disk 205, the shell 101, and the guide cylinder 102; an air guide mechanism is also provided; the air guide mechanism includes two air guide pipes 208 (as shown in FIG. 1 ) connected to one side of the cylinder 1 201 Figure 8 As shown), two exhaust ports 209 opened on the upper and lower sides of the cylinder 1 201, two air inlets 210 opened on the other side of the cylinder 1 201, and two exhaust flow channels 207 and an inlet flow channel 206 opened inside the rotating disk 205, the two exhaust flow channels 207 are symmetrically distributed on both sides of the inlet flow channel 206, one end of the two air guide pipes 208 is respectively connected to the two end spaces of the cylinder 202, and an air source device is arranged outside the two air inlets 210, the air source device includes an air tank 213, an air pump 214 and an air collecting shell 211 fixed on the outside of the cylinder 1 201 and connected to the two air inlets 210, the air outlet end of the air pump 214 is connected to the inside of the air tank 213, and the air outlet end of the air tank 213 is connected to the inside of the air collecting shell 211 through the air inlet pipe 212;

[0033] The air guide mechanism intermittently introduces high-pressure air to one end of the cylinder 202 in the tension holding mechanism, thereby pushing the piston 204 to move intermittently, and the piston 204 then intermittently adjusts the pressure between the damping plate 1 4 and the damping plate 2 5 through the transmission mechanism;

[0034] The calibration mechanism includes a threaded slider 501 (such as Figure 7 As shown), a screw rod 502 rotatably connected to the outside of the housing 101 and a vertical rod 503 fixed to the outside of the housing 101, the screw rod 502 is threadedly connected to the inside of the threaded slider 501, and the vertical rod 503 is inserted into the inside of the threaded slider 501 through sliding.

[0035] Furthermore, the adjustment mechanism includes a worm wheel 302 rotatably connected to one end of the outer side of the core rod 2 and a worm 303 rotatably connected to one end of the roller frame 1, the worm 303 meshes with the worm wheel 302, one end of the worm wheel 302 is fixed with an external threaded cylinder 305, the outer side of the external threaded cylinder 305 is threadedly connected with an internal threaded cylinder 306, one end of the internal threaded cylinder 306 is fixed with a pressing plate 307, one end of the pressing plate 307 is fixed with a plurality of pressing cylinders 308, one end of each pressing cylinder 308 is slidably inserted with a A pressure rod 304, one end of each pressure rod 304 is fixedly connected to one side of the damping plate 25, each pressing cylinder 308 is elastically connected to each pressure rod 304 through a pressure spring 309, a transmission mechanism is provided between the worm 303 and the piston 204, the transmission mechanism includes two piston rods 203 fixed on both sides of the piston 204 and a gear 310 fixed at one end of the worm 303, a rack 301 is fixed between the ends of the two piston rods 203, and the rack 301 is meshed with the gear 310 through teeth;

[0036] The adjusting mechanism is used to adjust the pressure between the damping plate 1 4 and the damping plate 2 5, thereby adjusting the friction between the two, and then adjusting the rotation damping of the pay-off roller 3, so as to maintain a constant tension of the steel wire.

[0037] Further, the speed-changing drive mechanism includes a first sliding pin 402 (such as Figure 5 As shown in the figure, two sliding columns 401 that are slidably connected to one side of the interior of the housing 101, an extension shaft 407 fixed to one end of the rotating disk 205, and a transmission lever 404 that is rotatably arranged on the inner side of the housing 101, a steering rod 408 is slidably connected to the interior of the extension shaft 407, a second sliding groove 409 is provided at one end of the steering rod 408, a third sliding pin 410 is rotatably connected between the two sliding columns 401, two first sliding grooves 405 are provided at both ends of the transmission lever 404, the first sliding pin 402 and the third sliding pin 410 are respectively slidably connected to the inner sides of the two first sliding grooves 405, a second sliding pin 406 located on the outer side of the housing 101 is rotatably connected between the two sliding columns 401, the second sliding pin 406 is slidably connected to the inner side of the second sliding groove 409, the transmission lever 404 is rotatably connected to the inner side of the housing 101 through a support rod 403, and the distance between the support rod 403 and the first sliding pin 402 is smaller than the distance between the support rod 403 and the third sliding pin 410;

[0038] Through the speed-changing drive mechanism, when the wire tension changes, the guide cylinder 102 will be driven to move up and down, and the distance between the support rod 403 and the first sliding pin 402 is smaller than the distance between the support rod 403 and the third sliding pin 410. Therefore, when the guide cylinder 102 moves up and down with a very small amplitude, the transmission lever 404 can be used to drive the two sliding columns 401 to move up and down with a larger amplitude, thereby improving the sensitivity of the tension sensing mechanism, and allowing the tension maintaining mechanism to more accurately control the adjustment mechanism therein, so that the adjustment mechanism can more accurately adjust the pressure between the damping plate 1 4 and the damping plate 2 5, thereby improving the accuracy of the damping adjustment of the pay-off roller 3.

[0039] Furthermore, guide rods 104 are slidably inserted into the lower ends of the two guide cylinders 102, and the lower ends of the two guide rods 104 are fixedly connected to the inner bottom end of the housing 101;

[0040] The guide tube 102 is guided by the guide rod 104 so that the guide tube 102 can move up and down while maintaining a vertical angle, thereby improving the accuracy of sensing the tension of the steel wire.

[0041] Furthermore, it also includes a bottom plate 6 placed on the ground, the roller frame 1 and the shell 101 are fixed on the upper side of the bottom plate 6, four side plates 7 are fixed on the upper side of the bottom plate 6 at the positions on both sides of the detection roller 103, and the upper ends of the two side plates 7 on the same side are rotatably connected to the guide rollers 8;

[0042] The heights of the two guide rollers 8 remain unchanged. When the steel wire is subjected to different pulling forces, the tension thereof changes, thereby driving the detection roller 103 to move up and down, thereby changing the height of the detection roller 103, and thus sensing the tension of the steel wire.

[0043] Working principle: When the steel wire outside the pay-off roller 3 is filled, the diameter of the steel wire roll outside the pay-off roller 3 is the largest. When the friction between the damping plate 1 4 and the damping plate 2 5 remains unchanged, the tension on the steel wire outside the pay-off roller 3 is the smallest. When the steel wire outside the pay-off roller 3 is fully wound, the multiple pressure springs 309 of the adjustment mechanism will be initially compressed, thereby applying an initial thrust to each pressure rod 304, so that the initial friction force is generated between the damping plate 2 5 and the damping plate 1 4, so that the pay-off roller 3 and the steel wire outside it have a certain damping when rotating, ensuring that the steel wire is subjected to a constant tension;

[0044] When the end of the steel wire is pulled by the twisting device, the steel wire is guided by the lower side of the two guide rollers 8 and then wound on the upper side of the detection roller 103. Figure 1In the state shown, when the steel wire is subjected to tension, it will apply a vertical downward thrust to the detection roller 103, and the thrust will be transmitted to the two guide cylinders 102 through the detection roller 103. The two guide cylinders 102 respectively apply pressure to the two induction springs 105, and the two induction springs 105 are compressed. The greater the tension on the steel wire, the greater its tension, and therefore the greater the compression on the induction spring 105. When the steel wire outside the pay-off roller 3 is fully wound, the steel wire is subjected to the smallest tension, and therefore its tension is the smallest, and therefore the compression on the induction spring 105 is also the smallest. When the steel wire outside the pay-off roller 3 is fully wound, the pay-off At the beginning of the time period, by rotating the screw rod 502 of the calibration mechanism, the screw rod 502 drives the threaded slider 501 to move vertically up and down, thereby driving the cylinder 1 201 and the rotating disk 205 of the tension holding mechanism to move up and down. When the extension shaft 407 of the speed change driving mechanism is aligned with the second sliding pin 406, the sliding steering rod 408 moves toward the direction of the second sliding pin 406, so that the second sliding groove 409 moves to the outside of the second sliding pin 406. At this time, the steering rod 408 maintains a horizontal angle, and both ends of the intake flow channel 206 and the two exhaust flow channels 207 are closed by the cylinder 1 201;

[0045] As the steel wire on the outer side of the pay-off roller 3 is gradually released, the diameter of the wire wheel will become smaller. In order to overcome the damping of the pay-off roller 3, the pulling force on the steel wire will increase, so the tension of the steel wire will gradually increase. Therefore, the guide cylinder 102 will gradually move downward, and the first sliding pin 402 and the third sliding pin 410 will respectively cooperate with the two first sliding grooves 405. When the two guide cylinders 102 move downward, the transmission lever 404 can be driven to rotate, and the transmission lever 404 drives the two sliding columns 401 to move upward in the opposite direction. The two sliding columns 401 drive the second sliding pin 406 to move upward, and then through the active cooperation between the second sliding pin 406 and the second sliding groove 409, the steering rod 408 is driven to rotate, and the steering rod 408 drives the rotating disk 205 of the tension holding mechanism to rotate, and the rotating disk 205 drives the two exhaust flow channels 207 and an intake flow channel 206 therein to rotate, so that one end of the intake flow channel 206 is connected to one of the air guide pipes 208, and the intake flow channel 206 is connected to the air guide pipe 208. The other end is connected to one of the air inlets 210, and one of the exhaust channels 207 connects the other air duct 208 to the outside through the exhaust port 209 at the corresponding position. The air pump 214 of the air source device keeps running to pump high-pressure air into the air tank 213. The high-pressure air in the air tank 213 is introduced into the inner side of the air collecting shell 211 through the air inlet pipe 212, and then flows into the inner side of one of the air ducts 208 through the air inlet channel 206, and then flows into the space at one end of the inner side of the cylinder 202 through this air duct 208. After the high-pressure air flows into the inner side of the cylinder 202, it pushes the piston 204 to move toward the other end of the cylinder 202. The movement of the piston 204 can squeeze the air at the other end of the cylinder 202 into the inner side of the other air duct 208, and then through an exhaust channel 207 and the exhaust port 209 connected with this air duct 208, the piston 204 can discharge the air at the other end of the cylinder 202 to the outside.

[0046] At the same time, when the piston 204 moves, it drives the two piston rods 203 of the transmission mechanism to move, and the two piston rods 203 drive the rack 301 to move. The rack 301 drives the gear 310 to rotate through the teeth, thereby driving the worm 303 of the adjustment mechanism to rotate, and the worm 303 drives the worm wheel 302 to rotate, and the worm wheel 302 drives the external threaded cylinder 305 to rotate. The external threaded cylinder 305 drives the internal threaded cylinder 306 and the pressing plate 307 to move toward the worm wheel 302 through the thread, and the pressing plate 307 drives multiple pressing cylinders 308 away from the roller frame 1, thereby reducing the pressure on multiple pressure springs 309, thereby reducing the pressure on multiple pressure rods 304, and thereby reducing the pressure between the damping plate 2 5 and the damping plate 1 4, so that the friction between the damping plate 2 5 and the damping plate 1 4 can be reduced, thereby reducing the release The rotation damping of the wire roller 3 and the steel wire on its outer side can reduce the pulling force on the steel wire, and then reduce the tension of the steel wire, so that the tension of the steel wire is reduced and restored to the original tension. When the tension on the steel wire is reduced, the pressure on the sensing spring 105 can be reduced. Under the action of the sensing spring 105, the guide cylinder 102 is pushed to gradually move upward, thereby driving the detection roller 103 to move upward, and at the same time, the rotating disk 205 of the tension holding mechanism is driven to rotate in the opposite direction through the transmission mechanism, so that the inlet flow channel 206 and the two exhaust flow channels 207 are closed by the cylinder 1 201 again, so that the inlet flow channel 206 and the two exhaust flow channels 207 are not connected to the two air guide pipes 208. At this time, the pressure between the damping plate 1 4 and the damping plate 2 5 is reduced and remains unchanged again, thereby reducing the rotation damping of the wire pay-off roller 3;

[0047] Through the continuous cycle of the above principle, as the diameter of the wire wheel of the steel wire outside the pay-off roller 3 is further reduced, the pulling force on the steel wire increases again, and the tension of the steel wire also increases again. Therefore, by repeating the above action again, the pressure between the damping plate 1 4 and the damping plate 2 5 can be further reduced, thereby reducing the rotation damping of the pay-off roller 3, so that the tension of the steel wire can be reduced again to restore to the original tension size. The tension of the steel wire is continuously detected by the tension sensing mechanism, and the damping of the pay-off roller 3 is intermittently adjusted by the tension holding mechanism. The damping can be reduced by a smaller force each time, so that the pulling force on the steel wire can fluctuate up and down within a very small range, so that the steel wire tension also fluctuates up and down within a very small range, so that the steel wire tension is always close to the specified value, avoiding large fluctuations in the steel wire tension, thereby ensuring that the steel wire maintains a constant tension during pay-off and improving the twisting quality of the steel cord.

[0048] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cord constant tension pay-off device, comprising a roller frame (1) and a core rod (2) fixed inside the roller frame, wherein the outer side of the core rod (2) is detachably and rotatably connected to a pay-off roller (3), characterized in that: A damping plate 1 (4) is fixed to one end of the pay-off roller (3), a damping plate 2 (5) is movably provided to one end of the core rod (2), and further comprises: A tension sensing mechanism and a tension holding mechanism for adjusting damping in real time according to the tension; The tension sensing mechanism comprises a housing (101), two guide cylinders (102) are slidably inserted into one side of the upper end of the housing (101), the lower ends of the two guide cylinders (102) are elastically connected to the inner lower end of the housing (101) via a sensing spring (105), and detection rollers (103) are rotatably provided at the upper ends of the two guide cylinders (102); The tension holding mechanism comprises a cylinder 1 (201) movably arranged on one side of the shell (101) through a calibration mechanism and a cylinder 2 (202) fixed on one end of the roller frame (1); a piston (204) is slidably connected to the inner side of the cylinder 2 (202); an adjustment mechanism for adjusting the pressure of the damping plate 2 (5) is arranged between the piston (204) and the core rod (2); a rotating disk (205) is rotatably arranged on the inner side of the cylinder 1 (201); and a speed-changing drive mechanism is arranged between the rotating disk (205), the shell (101) and the guide cylinder (102); An air guide mechanism is also provided; The air guide mechanism comprises two air guide pipes (208) connected to one side of cylinder one (201), two exhaust ports (209) opened on the upper and lower sides of cylinder one (201), two air inlets (210) opened on the other side of cylinder one (201), and two exhaust flow channels (207) and one inlet flow channel (206) opened inside the rotating disk (205), the two exhaust flow channels (207) being symmetrically distributed on both sides of the inlet flow channel (206), one end of the two air guide pipes (208) being respectively connected to the spaces at both ends of cylinder two (202), and an air source device being arranged outside the two air inlets (210).

2. The cord constant tension pay-off device according to claim 1, characterized in that: The adjusting mechanism comprises a worm wheel (302) rotatably connected to one end of the outer side of the core rod (2) and a worm (303) rotatably connected to one end of the roller frame (1); the worm (303) meshes with the worm wheel (302); an external threaded barrel (305) is fixed to one end of the worm wheel (302); an external threaded barrel (306) is threadedly connected to the outer side of the external threaded barrel (305); a pressing plate (307) is fixed to one end of the internal threaded barrel (306); and the pressing plate (307) is fixed to one end of the internal threaded barrel (306). 07) is fixed with a plurality of pressing cylinders (308) at one end, and a pressure rod (304) penetrating one end of the roller frame (1) is slidably inserted at one end of each of the pressing cylinders (308), and one end of each of the pressure rods (304) is fixedly connected to one side of the damping plate (5), and each of the pressing cylinders (308) is elastically connected to each of the pressure rods (304) via a pressure spring (309), and a transmission mechanism is provided between the worm (303) and the piston (204).

3. The cord constant tension pay-off device according to claim 2, characterized in that: The transmission mechanism comprises two piston rods (203) fixed on both sides of the piston (204) and a gear (310) fixed on one end of the worm (303); a rack (301) is fixed between the ends of the two piston rods (203); the rack (301) meshes with the gear (310) via teeth.

4. The cord constant tension pay-off device according to claim 1, characterized in that: The gas source device comprises a gas tank (213), an air pump (214), and a gas collecting shell (211) fixed to the outside of cylinder one (201) and connected to two gas inlets (210); the gas outlet end of the air pump (214) is connected to the inside of the gas tank (213); and the gas outlet end of the gas tank (213) is connected to the inside of the gas collecting shell (211) via an air inlet pipe (212).

5. The cord constant tension pay-off device according to claim 1, characterized in that: The speed change drive mechanism comprises a first sliding pin (402) rotatably connected between two guide cylinders (102), two sliding columns (401) penetrating and slidably connected to one side of the interior of the housing (101), an extension shaft (407) fixed to one end of the rotating disk (205), and a transmission lever (404) rotatably arranged on the inner side of the housing (101), a steering rod (408) penetrating and slidably connected to the interior of the extension shaft (407), and a second sliding groove (409) is provided at one end of the steering rod (408). A third sliding pin (410) is rotatably connected between the two sliding columns (401), two first sliding grooves (405) are provided at both ends of the transmission lever (404), the first sliding pin (402) and the third sliding pin (410) are respectively slidably connected to the inner sides of the two first sliding grooves (405), a second sliding pin (406) located outside the housing (101) is rotatably connected between the two sliding columns (401), and the second sliding pin (406) is slidably connected to the inner side of the second sliding groove (409).

6. The cord constant tension pay-off device according to claim 5, characterized in that: The transmission lever (404) is rotatably connected to the inner side of the housing (101) via a support rod (403), and the distance between the support rod (403) and the first sliding pin (402) is smaller than the distance between the support rod (403) and the third sliding pin (410).

7. The cord constant tension pay-off device according to claim 1, characterized in that: The calibration mechanism comprises a threaded slider (501) fixed on the outside of the cylinder (201), a screw rod (502) rotatably connected to the outside of the shell (101), and a vertical rod (503) fixed on the outside of the shell (101), wherein the screw rod (502) is threadably connected to the inside of the threaded slider (501), and the vertical rod (503) is inserted into and slidably penetrates the inside of the threaded slider (501).

8. The cord constant tension pay-off device according to claim 1, characterized in that: A guide rod (104) is slidably inserted into the lower ends of the two guide cylinders (102), and the lower ends of the two guide rods (104) are fixedly connected to the inner bottom end of the shell (101).

9. The cord constant tension pay-off device according to claim 1, characterized in that: It also includes a bottom plate (6) placed on the ground, the roller frame (1) and the shell (101) are fixed on the upper side of the bottom plate (6), four side plates (7) are fixed on the upper side of the bottom plate (6) at positions on both sides of the detection roller (103), and the upper ends of the two side plates (7) located on the same side are rotatably connected to guide rollers (8).

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