Broken thread detection device and textile processing equipment

Abstract

The invention relates to a broken line detection device and textile processing equipment. The broken line detection device comprises a fixed seat, a swing frame, a first infrared correlation sensor, a second infrared correlation sensor and a first controller, the swing frame comprises a rotating shaft, a connecting rod and a balance weight rod, the rotating shaft is rotationally connected with the fixing base, the balance weight rod is in an L shape, the lower end of the balance weight rod and the lower end of the connecting rod are both fixed to the rotating shaft, a first guide roller parallel to the rotating shaft is arranged at the upper end of the connecting rod, and a second guide roller parallel to the rotating shaft is arranged at the upper end of the balance weight rod. The first infrared correlation sensor is used for detecting the position of the yarn in the horizontal state, and the second infrared correlation sensor is used for detecting the position of the yarn in the inclined loose state. According to the invention, the timeliness of broken line detection can be improved.

Description

Technical Field

[0001] This application relates to the field of spinning equipment, and in particular to a broken yarn detection device and textile processing equipment. Background Art

[0002] During the working process of yarn processing equipment, due to the complex action of various tension and pulling forces on the yarn, the yarn may break. In order to detect the broken yarn in time to reduce unnecessary losses, a broken yarn detection device is often required.

[0003] Existing broken yarn detection devices often use infrared opposed sensors for detection, that is, to detect whether there is a yarn passing through. When it is detected that there is no yarn passing through, the textile equipment is controlled to stop running.

[0004] However, when the yarn breaks at the rear position of the broken yarn detection device, the yarn can maintain its position unchanged for a certain period of time. It is necessary to wait for the textile equipment to run for a while longer until the yarn has more room for movement before the change in the yarn position can trigger the broken yarn detection. That is, this detection method has a delay and it is difficult to detect in time. Summary of the Invention

[0005] In order to improve the timeliness of detection, this application provides a broken yarn detection device and textile processing equipment.

[0006] A broken yarn detection device provided by this application adopts the following technical solution: A broken yarn detection device includes a fixed seat, a swing frame, a first infrared opposed sensor, a second infrared opposed sensor, and a first controller. The fixed seat is provided with a vertical plate. The first infrared opposed sensor and the second infrared opposed sensor are both arranged on the vertical plate, and the first infrared opposed sensor is higher than the second infrared opposed sensor. The swing frame includes a rotating shaft, a connecting rod, and a counterweight rod. The rotating shaft is rotatably connected to the fixed seat. The counterweight rod is L-shaped. The lower ends of the counterweight rod and the connecting rod are both fixed to the rotating shaft. The upper end of the connecting rod is provided with a first guide roller parallel to the rotating shaft. The upper end of the counterweight rod is provided with a second guide roller parallel to the rotating shaft. The yarn passes horizontally through the first guide roller and the second guide roller. The distance between the second guide roller and the rotating shaft is greater than the distance between the first guide roller and the rotating shaft. The top of the first guide roller abuts against the yarn, and the bottom of the second guide roller abuts against the yarn. The first infrared opposed sensor is used to detect the position of the horizontally placed yarn, and the second infrared opposed sensor is used to detect the position of the inclined and slack yarn. The second infrared opposed sensor is electrically connected to the first controller.

[0007] By adopting the above technical solution, the gravity of the counterweight rod is greater than that of the connecting rod. The counterweight rod applies a certain pressure to the yarn under the action of gravity, forming the tension of the yarn and ensuring that the yarn is at the detection position of the first infrared counter-radiation sensor. When the yarn breaks and becomes loose, under the action of the gravity of the counterweight rod, the swing frame deflects, and the first guide roller and the second guide roller drive the yarn to deflect downward, and the yarn leaves the first infrared counter-radiation sensor. When the second infrared counter-radiation sensor detects the deflected yarn, it transmits a signal to the first controller, and the first controller controls the processing equipment to stop, thereby reducing the loss caused by untimely detection.

[0008] By setting the first infrared counter-radiation sensor and the second infrared counter-radiation sensor, when the yarn is relaxed due to insufficient traction during conveying, that is, the relaxation is not caused by thread breakage, although it will trigger the induction of the first infrared counter-radiation sensor, the degree of relaxation is smaller and the yarn offset distance is limited, which cannot trigger the induction of the second infrared counter-radiation sensor, that is, it can greatly improve the detection accuracy and reduce false induction.

[0009] Secondly, by setting the specific shape of the swing frame and utilizing the lever principle to amplify the offset distance of the yarn, the distance between the first infrared sensor and the second infrared sensor is increased in disguise, thereby reducing the possibility of the yarn mistakenly triggering the induction of the second infrared sensor due to accidental relaxation of the yarn.

[0010] Optionally, it also includes a pressure component and a second controller, the second controller is electrically connected to the pressure component and the first infrared counter-radiation sensor, respectively, when the first infrared counter-radiation sensor fails to detect the yarn position after t1 time, the second controller starts the pressure component, the pressure component forces the swing frame to deflect along the downward direction of the second guide roller to drive the yarn to move toward the position of the second infrared counter-radiation sensor, when t2 time has passed since the pressure component was started and the second infrared counter-radiation sensor has not detected the yarn position, the second controller stops the pressure component; when t2 time has passed since the pressure component was started and the second infrared counter-radiation sensor detects the yarn position, the second controller stops the pressure component.

[0011] When the yarn breaks, the yarn is subjected to a certain traction or tension force as it passes through multiple conveyor rollers, making it difficult for the yarn to relax or only able to relax to a small extent. By adopting the above technical solution and setting a pressure component, when a small amplitude of the yarn is sensed, the pressure component is started to force the swing frame to deflect along the downward direction of the second guide roller, so as to drive the yarn to move toward the position of the second infrared counter-radiation sensor, that is, to force the yarn to deflect. If the yarn is indeed broken, when a large force is applied, the yarn will offset the traction or tension force of other conveyor rollers, and the yarn will deflect over a large distance, thereby triggering the induction of the second infrared counter-radiation sensor to complete the break detection.

[0012] When the yarn is not broken, that is, when it is loose due to non-breaking reasons, by limiting the starting time of the pressing component, within this starting time, the yarn stretches by its own elasticity, thus reducing the occurrence of the situation where the yarn is broken due to the continuous activation of the pressing component.

[0013] Optionally, the pressing component includes a servo motor and a rubber roller. A rubber sleeve is sleeved and fixed on the rotating shaft. The servo motor is used to drive the rubber roller to rotate. The outer peripheral surface of the rubber roller includes a flat part and an arc part. The arc part is used to abut against the outer peripheral surface of the rubber sleeve, and the flat part forms a movable gap with the outer peripheral surface of the rubber roller.

[0014] By adopting the above technical solution, first of all, through the cooperation of the arc part and the rubber sleeve, the friction force is used to drive the swing frame to deflect. This friction force is relatively gentle and will not damage the yarn too much. And when the yarn is loose due to non-breaking reasons, the elastic pulling of the yarn to a certain extent will offset the friction force between the arc part and the rubber sleeve, thereby preventing the deflection of the swing frame, that is, further reducing the damage to the yarn.

[0015] Secondly, by setting the flat part and using the movable gap, the rotating shaft is in a free state. Therefore, in the non-pressing state, the swing frame is only affected by gravity, and the yarn also undergoes the tension converted from gravity. The force on the yarn is small, the damage degree of the yarn is small, and the traction smoothness of the yarn is large.

[0016] Secondly, when the pressing component stops, the flat part faces the rubber sleeve, which also makes the rotating shaft in a free state. At this time, in the case of the elastic recovery of the yarn, the elastic force of the yarn will drive the swing frame to reset, thus facilitating the normal traction and conveying of the yarn.

[0017] Optionally, it further includes a yarn speed detection component, which includes a cylinder, an intake pipe, and a third infrared pair emission sensor. The cylinder is horizontally penetrated with a first through hole and a second through hole for the yarn to pass through. An air outlet pipe is provided on the side wall where the second through hole of the cylinder is located. The aperture of the second through hole is smaller than that of the air outlet pipe. The intake pipe communicates with the side wall where the first through hole of the cylinder is located. The cross-section of the air outlet pipe is semi-circular. A semi-circular light plate adapted to the inner peripheral surface of the air outlet pipe is provided in the air outlet pipe. The upper side of the light plate is hinged to the inner peripheral surface of the air outlet pipe. The third infrared pair emission sensor includes a transmitting part and a receiving part. The transmitting part is located on the inner top surface of the air outlet pipe, and the receiving part is located on the inner bottom surface of the air outlet pipe. When the light plate is blown by the air flow and deflected to the area between the transmitting part and the receiving part, the light plate blocks the infrared rays of the transmitting part. The receiving part is electrically connected to the second controller. When the receiving part does not receive the infrared rays of the transmitting part for t3 time, the second controller starts the pressure applying component. The pressure applying component forces the swing frame to deflect along the downward movement direction of the second guide roller, so as to drive the yarn to move towards the position of the second infrared pair emission sensor. When the pressure applying component starts for t2 time and the second infrared pair emission sensor does not detect the position of the yarn, the second controller stops the pressure applying component. When the pressure applying component starts for t2 time and the second infrared pair emission sensor detects the position of the yarn, the second controller stops the pressure applying component.

[0018] By adopting the above technical solution, when the yarn is normally traction-transported, the receiving part continuously receives the infrared rays from the transmitting part, and the intake pipe continuously blows a small flow of air into the cylinder. Since when the yarn is traction-transported, the yarn moves rapidly in the second through hole, which drives the air flow rate near it to increase, and the pressure at the position with a large flow rate is small. Therefore, the pressure difference in the second through hole is smaller than that in the cylinder, and the air flow blown by the intake pipe is discharged from the second through hole, and will not or only slightly trigger the offset of the light plate.

[0019] When the yarn breaks or temporarily stops being transported during the processing, that is, the yarn stops being transported. At this time, the pressure in the second through hole is generally the same as the pressure in the cylinder, and most of the air flow in the intake pipe enters the air outlet pipe. The air flow blows the light plate, causing the light plate to deflect. After the light plate deflects by a large angle, the light plate blocks the infrared rays emitted by the transmitting part. When the receiving part does not receive the infrared rays of the transmitting part for t3 time, the second controller starts the pressure applying component. The pressure applying component forces the swing frame to deflect along the downward movement direction of the second guide roller, so as to drive the yarn to move towards the position of the second infrared pair emission sensor, that is, to apply tension to the yarn. If the yarn stops being transported due to non-breaking reasons, when the pressure applying component starts for t2 time and the second infrared pair emission sensor does not detect the position of the yarn (the non-breaking yarn maintains a large elastic force and is not likely to have a large offset), at this time, the second controller stops the pressure applying component, and then waits for the yarn to continue to start transporting to restore the tension and position.

[0020] If the yarn stops being conveyed due to a broken yarn, the yarn has a large offset. When the pressing component is started for t2 time, the swing frame can move the yarn to the second infrared pair sensor. When the second infrared pair sensor detects the position of the yarn, the second controller stops the pressing component.

[0021] Optionally, the air cylinder is fixedly connected to the first guide roller.

[0022] By adopting the above technical solution, when there is a suspected broken yarn situation, the swing frame starts to deflect, and at the same time the air cylinder follows the deflection, the inclination angle of the light board increases, so that the blocking of the light board for the infrared ray is more stable, to reduce the small amplitude shaking of the light board caused by vibration and resulting in incorrect reception of the infrared ray.

[0023] Optionally, it further includes a yarn speed detection component. The yarn speed detection component includes an air cylinder, an air inlet pipe and a third infrared pair sensor. The air cylinder is horizontally arranged and fixedly connected to the fixed seat. The air cylinder is located in front of the first guide roller. The air cylinder is horizontally penetrated with a first through hole and a second through hole for the yarn to pass through. An air outlet pipe is provided on the side wall where the second through hole of the air cylinder is located. The aperture of the second through hole is smaller than that of the air outlet pipe. The air inlet pipe is communicated with the side wall where the first through hole of the air cylinder is located. The cross section of the air outlet pipe is semicircular. A semicircular light board with a shape adapted to the inner peripheral surface of the air outlet pipe is provided in the air outlet pipe. The upper side of the light board is hingedly connected to the inner peripheral surface of the air outlet pipe. A reflective layer is provided on the surface of the light board facing the air outlet direction of the air outlet pipe. The third infrared pair sensor includes a transmitting part and a receiving part. Both the transmitting part and the receiving part are located in the air outlet pipe. The receiving part is electrically connected to the second controller. The infrared ray of the transmitting part is projected on the reflective layer. When the light board is deflected by the air flow so that the infrared ray of the reflective layer is reflected to the receiving part, and when the receiving part receives the infrared ray of the transmitting part for t3 time, the second controller starts the pressing component. The pressing component forces the swing frame to deflect along the downward movement direction of the second guide roller to drive the yarn to move towards the position of the second infrared pair sensor. When the pressing component is started for t2 time and the second infrared pair sensor does not detect the position of the yarn, the second controller stops the pressing component; when the pressing component is started for t2 time and the second infrared pair sensor detects the position of the yarn, the second controller stops the pressing component.

[0024] By adopting the above technical solution, when the yarn is normally traction-conveyed, the light board is in a vertical state, and the receiving part cannot receive the infrared ray from the transmitting part. The air inlet pipe continuously blows a small flow of air into the air cylinder. Since when the yarn is traction-conveyed, the yarn moves rapidly in the second through hole, driving the air flow rate near it to increase, and the pressure at the position with a large flow rate is small. Therefore, the pressure difference in the second through hole is smaller than that in the air cylinder, and the air flow blown in by the air inlet pipe is discharged from the second through hole and will not or only slightly trigger the deflection of the light board.

[0025] When the yarn stops being conveyed due to a broken thread or a temporary stop in the processing, that is, when the yarn stops being conveyed, at this time, the pressure in the second through-hole is generally the same as the pressure in the air cylinder, and most of the air flow in the intake pipe enters the outlet pipe. The air flow blows the light plate, causing the light plate to deflect. After the light plate deflects by a large angle, the infrared ray of the emitting part shines on the reflective layer, and the infrared ray of the reflective layer is reflected to the receiving part. When the receiving part receives the infrared ray of the emitting part after t3 time, the second controller starts the pressure-applying component. The pressure-applying component forces the swing frame to deflect along the downward movement direction of the second guide roller, so as to drive the yarn to move towards the position of the second infrared pair sensor, that is, to apply tension to the yarn. If the yarn stops being conveyed due to non-broken thread reasons, when the pressure-applying component starts for t2 time and the second infrared pair sensor does not detect the position of the yarn (non-broken yarns maintain a large elastic force and are not prone to large displacement), at this time, the second controller stops the pressure-applying component, and then waits for the yarn to continue to start conveying to restore the tension and position.

[0026] If the yarn stops being conveyed due to a broken thread, the yarn has a large displacement. Within t2 time after the pressure-applying component starts, the swing frame can move the yarn to the second infrared pair sensor. When the second infrared pair sensor detects the position of the yarn, the second controller stops the pressure-applying component.

[0027] Optionally, the emitting part is located on the inner top surface of the outlet pipe, the receiving part is located on the inner top surface of the outlet pipe, the emitting part is arranged closer to the outlet of the outlet pipe relative to the light plate, and the receiving part is arranged closer to the outlet of the outlet pipe relative to the emitting part.

[0028] By adopting the above technical solution, by setting the relative positions of the emitting part and the receiving part, it can be obtained that the infrared ray of the emitting part originally shines on the inner bottom of the outlet pipe. Under the reflection of the reflective layer of the deflected light plate, the infrared ray of the emitting part will sweep from the inner bottom of the outlet pipe to the inner top of the outlet pipe, that is, the distance of the landing position of the infrared ray is magnified. In other words, the setting range of the position of the receiving part can be relatively large. It can be understood that if the light plate deflects by a small angle accidentally, even if the infrared ray is reflected, the gap between the landing point of the infrared ray and the position of the receiving part is extremely large, thereby reducing the occurrence of accidental induction of the receiving part and greatly improving the detection accuracy.

[0029] Optionally, the inner peripheral surface of the outlet pipe is covered with a black coating.

[0030] By adopting the above technical solution, the light absorption property of the black coating is utilized to reduce the accidental reflection of infrared rays.

[0031] Optionally, it further includes a wire assembly located at the rear side of the fixed seat. The wire assembly includes a bracket, a guide wheel, a magnetic block and a magnetic ring. The guide wheel is horizontally arranged, and the middle part of the guide wheel is ball-head connected to the end of the bracket. The yarn bypasses the guide wheel. The magnetic block is located directly above the part of the guide wheel where the yarn bypasses, and the magnetic ring is arranged on the guide wheel. The magnetic block and the magnetic ring are magnetically connected.

[0032] By adopting the above technical solution, the wire assembly is used to maintain the smoothness of the normal traction and conveying of the yarn, that is, the magnetic block and the magnetic ring are stably matched, so that the guide wheel is in a horizontal state. When the yarn breaks and the resistance on the front and rear sides of the yarn is large, making it difficult for the yarn to have a large deviation amount, under the action of the pressing assembly, the yarn will be forced to deviate, and the yarn will also force the guide wheel to deflect around its ball-head connection (the magnetic block and the magnetic ring are separated). After the guide wheel deflects a certain angle, the yarn will smoothly break away from the guide wheel. At this time, the movement margin of the yarn is larger, and the yarn is more likely to trigger the second infrared pair sensor.

[0033] When the yarn is not broken, the traction resistance on the front and rear sides of the yarn is extremely large, and the yarn is difficult to overcome the magnetic attraction between the magnetic block and the magnetic ring, that is, the yarn is not easy to drive the guide wheel to deflect, and the yarn is not easy to accidentally touch the second infrared pair sensor.

[0034] A textile processing device provided by the present application adopts the following technical solution: A textile processing device includes a wire feeding device, a wire breakage detection device, and a processing device. The first controller is used to control the stop of the processing device and the wire feeding device.

[0035] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting the first infrared pair sensor and the second infrared pair sensor, when the yarn is slack during the conveying process due to insufficient traction force, that is, the slack caused by non-wire breakage reasons, although it will trigger the induction of the first infrared pair sensor, however, the slack degree caused by non-wire breakage reasons is small, and the deviation distance of the yarn is limited, which cannot trigger the induction of the second infrared pair sensor, that is, it can greatly improve the detection accuracy and reduce false induction; 2. By setting the pressing assembly, when it is sensed that the yarn is in a small amplitude, the pressing assembly is activated to force the swing frame to deflect along the downward movement direction of the second guide roller, so as to drive the yarn to move towards the position of the second infrared pair sensor, that is, to force the yarn to deviate. If the yarn does have a wire breakage situation, under the application of a large force, the yarn will offset the traction force or tension force of other conveying rollers, and the yarn will have a large distance deviation, thereby triggering the induction of the second infrared pair sensor to complete the wire breakage detection; 3. By setting up a yarn speed detection component to detect the stationary yarn, that is, both the slack condition of the yarn and the condition of the yarn stopping being conveyed can be detected. And through the secondary confirmation of the pressing component, the specific broken yarn condition can be further confirmed, that is, the accuracy of broken yarn detection is greatly improved. Description of the Drawings

[0036] Figure 1 is a cross-sectional view of the broken yarn detection device of Embodiment 1.

[0037] Figure 2 is a schematic diagram of the broken yarn detection device of Embodiment 1 in the state of yarn deviation.

[0038] Figure 3 is a cross-sectional view of the broken yarn detection device of Embodiment 2.

[0039] Figure 4 is a schematic diagram of the broken yarn detection device of Embodiment 2 in the state of yarn deviation.

[0040] Figure 5 is a cross-sectional view of the broken yarn detection device of Embodiment 3.

[0041] Figure 6 is a cross-sectional view of the air cylinder of Embodiment 3 in the state of yarn being conveyed.

[0042] Figure 7 is Figure 6 the partial enlarged view at A in

[0043] Figure 8 is a schematic diagram of the light board of Embodiment 3.

[0044] Figure 9 is a cross-sectional view of the air cylinder of Embodiment 3 in the state of yarn stopping being conveyed.

[0045] Figure 10 is a cross-sectional view of the broken yarn detection device of Embodiment 4.

[0046] Figure 11 is a cross-sectional view of the air cylinder of Embodiment 4 in the state of yarn stopping being conveyed.

[0047] Figure 12 is Figure 11 the partial enlarged view at B in

[0048] Figure 13 is a schematic diagram of the wire component of Embodiment 5.

[0049] Figure 14 is the position change diagram of the guide wheel of Embodiment 5 shifting from the horizontal state to the inclined state.

[0050] Description of reference numerals: 1, fixed seat; 3, swing frame; 5, rubber roller; 6, air cylinder; 7, wire assembly; 10, yarn; 11, vertical plate; 12, avoidance groove; 21, first infrared pair sensor; 22, second infrared pair sensor; 23, third infrared pair sensor; 231, transmitting part; 232, receiving part; 31, connecting rod; 32, counterweight rod; 33, first guide roller; 34, second guide roller; 35, rotating shaft; 51, arc part; 52, flat part; 53, rubber sleeve; 61, first through hole; 62, second through hole; 63, air inlet pipe; 64, air outlet pipe; 65, light plate; 66, hinge; 71, bracket; 72, guide wheel; 73, magnetic block; 74, magnetic ring. Detailed implementation manners

[0051] The following further elaborates on this application Figure 1-14 in conjunction with the attached drawings.

[0052] Embodiment 1 of this application discloses a textile processing device.

[0053] Referring to Figure 1 , the textile processing device includes a wire feeding device (not shown in the figure), a wire breakage detection device, and a processing device (not shown in the figure). The wire feeding device is used to feed the yarn 10 to the processing device, and the processing device is used to process the yarn 10. The wire breakage detection device is located between the wire feeding device and the processing device and is used to detect the wire breakage situation of the yarn 10. When the yarn 10 breaks, the feeding of the wire feeding device and the processing of the processing device are stopped.

[0054] As Figure 1 , Figure 2 shown, there are a fixed seat 1, a swing frame 3, a first infrared pair sensor 21, a second infrared pair sensor 22, and a first controller (not shown in the figure). At the top of the fixed seat 1, two relatively arranged vertical plates 11 are fixed. An area for the yarn 10 to pass through is formed between the two vertical plates 11. Both the first infrared pair sensor 21 and the second infrared pair sensor 22 are arranged on the vertical plates 11. Specifically, the transmitting structures of the first infrared pair sensor 21 and the second infrared pair sensor 22 are located on one of the vertical plates 11, and the receiving structures of the first infrared pair sensor 21 and the second infrared pair sensor 22 are located on the other vertical plate 11. The infrared emission directions of the first infrared pair sensor 21 and the second infrared pair sensor 22 are the relative directions of the two vertical plates 11, and the first infrared pair sensor 21 is higher than the second infrared pair sensor 22.

[0055] The swing frame 3 includes a rotating shaft 35, a connecting rod 31, and a counterweight rod 32. The axial direction of the rotating shaft 35 is the relative direction of the two vertical plates 11. The rotating shaft 35 is rotatably connected to the fixed seat 1. The counterweight rod 32 is L-shaped. The lower ends of the counterweight rod 32 and the connecting rod 31 are both fixed on the rotating shaft 35. The upper end of the connecting rod 31 is provided with a first guide roller 33 parallel to the rotating shaft 35. The upper end of the counterweight rod 32 is provided with a second guide roller 34 parallel to the rotating shaft 35. The yarn 10 passes horizontally through the first guide roller 33 and the second guide roller 34. The distance between the second guide roller 34 and the rotating shaft 35 is greater than the distance between the first guide roller 33 and the rotating shaft 35. The top of the first guide roller 33 abuts against the yarn 10, and the bottom of the second guide roller 34 abuts against the yarn 10. In the normal conveying state, the yarn 10 is in an approximately horizontal state. The yarn 10 passes through the first guide roller 33 and the second guide roller 34 in sequence. And because the gravity of the counterweight rod 32 is greater than the gravity of the connecting rod 31, the counterweight rod 32 applies a certain pressure to the yarn 10 under the action of gravity, forming the tension of the yarn 10 and ensuring that the yarn 10 is in the detection position of the first infrared pair sensor 21, and the first infrared pair sensor 21 is used to detect the position of the horizontally placed yarn 10. And, in order to increase the counterweight effect of the counterweight rod 32, additional counterweight blocks can be added to the counterweight rod 32 in other embodiments. Secondly, in order to avoid the collision interference between the swing frame 3 and the fixed seat 1, an avoidance groove 12 is also provided on the upper surface of the fixed seat 1.

[0056] The second infrared pair sensor 22 is used to detect the position of the inclined and slack state of the yarn 10. The second infrared pair sensor 22 is electrically connected to the first controller, and the first controller is used to control the stop of the processing device and the wire feeding device.

[0057] When the yarn 10 breaks and becomes slack, under the action of the gravity of the counterweight rod 32, the swing frame 3 deflects, and the first guide roller 33 and the second guide roller 34 drive the yarn 10 to deflect downward. The second infrared pair sensor 22 detects the deflected yarn 10 and then transmits a signal to the first controller, and the first controller controls the stop of the processing device and the wire feeding device, thereby reducing the loss caused by untimely detection.

[0058] Secondly, by setting the first infrared pair sensor 21 and the second infrared pair sensor 22, when the yarn 10 becomes slack due to insufficient traction during the conveying process, that is, the slack caused by non-breaking reasons, although it will trigger the induction of the first infrared pair sensor 21, however, the slack degree caused by non-breaking reasons is relatively small, and the deflection distance of the yarn 10 is limited, which cannot trigger the induction of the second infrared pair sensor 22, that is, it can greatly improve the detection accuracy and reduce false induction.

[0059] Embodiment 2 The difference between Embodiment 2 and Embodiment 1 is that, as Figure 3 、Figure 4 As shown, the broken wire detection device further includes a pressing component and a second controller (not shown in the figure). The pressing component includes a rubber roller 5 and a servo motor (not shown in the figure). The servo motor is used to drive the rubber roller 5 to rotate. The second controller is electrically connected to the servo motor and the first infrared pair sensor 21 respectively.

[0060] A rubber sleeve 53 is sleeved and fixed on the rotating shaft 35. The rubber roller 5 is parallel to the rotating shaft 35. The outer peripheral surface of the rubber roller 5 includes a flat portion 52 and an arc portion 51. The arc portion 51 is used to abut against the outer peripheral surface of the rubber sleeve 53. Under normal conditions, that is, when the servo motor does not start the rubber roller 5, a movable gap is formed between the flat portion 52 of the rubber roller 5 and the outer peripheral surface of the rubber sleeve 53 to ensure that the swing frame 3 is in a freely rotatable state.

[0061] When the yarn 10 is broken, since the yarn 10 passes through multiple conveying rollers, the yarn 10 is also subjected to a certain traction force or tension force, so that the yarn 10 is not easily relaxed or can only be relaxed to a small extent. That is, when the yarn 10 is relaxed and the first infrared pair sensor 21 cannot detect the position of the yarn 10, there are two situations. One is that the yarn 10 is broken and relaxed, and the other is that the yarn 10 is relaxed during conveying. In the second case, under the tension applied by the swing frame 3, the yarn 10 is also not easily relaxed and difficult to trigger the second infrared pair sensor 22.

[0062] Therefore, when the yarn 10 is relaxed, after calculating a t1 time from when the first infrared pair sensor 21 cannot detect the position of the yarn 10, t1 is 0.1 - 3 s, the second controller starts the servo motor, the rubber roller 5 rotates, and the rubber roller 5 drives the rotating shaft 35 by friction, thereby driving the swing frame 3 to deflect along the downward movement direction of the second guide roller 34, so as to drive the yarn 10 to move towards the position of the second infrared pair sensor 22, that is, to force the yarn 10 to deflect, and the start duration t2 of the servo motor is defined, t2 is 2 - 5 s.

[0063] If the yarn 10 is indeed broken, when a large force is applied, the yarn 10 will offset the traction force or tension force of other conveying rollers, and the yarn 10 will have a large distance offset, thereby triggering the induction of the second infrared pair sensor 22 to complete the broken wire detection. That is, when the second infrared pair sensor 22 detects the position of the yarn 10 within the t2 time after the servo motor starts, the second controller stops the servo motor.

[0064] If the servo motor still starts and lasts for a time t2 when the yarn 10 is not broken, that is, when there is slack not caused by a broken line, during this starting time, although the swing frame 3 continuously increases the tension of the yarn 10, the yarn 10 stretches using its own elasticity, thereby reducing the occurrence of the situation where the yarn 10 is broken due to the continuous starting of the servo motor. Moreover, when the elastic pulling of the yarn 10 reaches a certain extent, it will offset the frictional force between the arc portion 51 and the rubber sleeve 53, thereby preventing the offset of the swing frame 3, that is, further reducing the damage to the yarn 10.

[0065] Therefore, after the servo motor starts for a time t2 and the second infrared pair of light sensors 22 do not detect the position of the yarn 10, the second controller stops the servo motor. And when the rubber roller 5 stops, the flat portion 52 faces the rubber sleeve 53, which also makes the rotating shaft 35 in a free state. At this time, in the case of the elastic recovery of the yarn 10, the elastic force of the yarn 10 will drive the swing frame 3 to reset, thus facilitating the subsequent normal traction and conveying of the yarn 10.

[0066] Embodiment 3 The difference between Embodiment 3 and Embodiment 2 is that, as Figure 5 、 Figure 6 shown, the broken line detection device further includes a yarn speed detection component. The yarn speed detection component includes an air cylinder 6, an air inlet pipe 63, and a third infrared pair of light sensors 23. Among them, the air cylinder 6 is fixedly connected to the first guide roller 33 relatively. The air cylinder 6 is horizontally penetrated with a first through hole 61 and a second through hole 62 for the yarn 10 to pass through. An air outlet pipe 64 is provided on the side wall of the air cylinder 6 where the second through hole 62 is located. The aperture of the second through hole 62 is smaller than that of the air outlet pipe 64. The air inlet pipe 63 is communicated with the side wall of the air cylinder 6 where the first through hole 61 is located. The cross-section of the air outlet pipe 64 is semicircular, and the air outlet pipe 64 and the second through hole 62 are symmetrically arranged with the air inlet pipe 63 as the center.

[0067] As Figure 7 、 Figure 8 shown, a semicircular light-weight plate 65 whose shape fits the inner peripheral surface of the air outlet pipe 64 is provided in the air outlet pipe 64. The upper side of the light-weight plate 65 is hinged to the inner top surface of the air outlet pipe 64 through a hinge 66. The light-weight plate 65 can be made of a plastic thin plate or a cardboard.

[0068] The third infrared pair of light sensors 23 includes a transmitting part 231 and a receiving part 232. The transmitting part 231 is located on the inner top surface of the air outlet pipe 64, and the receiving part 232 is located on the inner bottom surface of the air outlet pipe 64. The receiving part 232 is electrically connected to the second controller. The transmitting part 231 emits infrared rays vertically downward, and the receiving part 232 continuously receives the infrared rays.

[0069] As Figure 6As shown, when the yarn 10 is being normally traction-transported, the receiving part 232 continuously receives the infrared rays from the transmitting part 231, and the air inlet pipe 63 continuously blows a small flow of air into the air cylinder 6. Since when the yarn 10 is traction-transported, the yarn 10 moves rapidly in the second through-hole 62, which drives the air flow rate in the vicinity to increase, and the pressure at the position with a large flow rate is small. Therefore, the pressure difference in the second through-hole 62 is smaller than that in the air cylinder 6, and the air flow blown in by the air inlet pipe 63 is discharged from the second through-hole 62, and will not or only slightly trigger the deflection of the light-weight plate 65.

[0070] As Figure 9 shown, when the yarn 10 stops being transported due to yarn breakage or a temporary stop in the processing process, that is, the yarn 10 stops being transported. At this time, the pressure in the second through-hole 62 is generally the same as the pressure in the air cylinder 6, and most of the air flow in the air inlet pipe 63 enters the air outlet pipe 64. The air flow blows the light-weight plate 65, causing the light-weight plate 65 to deflect. After the light-weight plate 65 deflects by a large angle, the light-weight plate 65 blocks the infrared rays emitted by the transmitting part 231. When the receiving part 232 does not receive the infrared rays from the transmitting part 231 after a time t3, where t3 is 0.1 - 3 s, the second controller starts the pressure-applying component, and the pressure-applying component forces the swing frame 3 to deflect along the downward movement direction of the second guide roller 34, so as to drive the yarn 10 to move towards the position of the second infrared pair sensor 22, that is, to apply tension to the yarn 10.

[0071] If the yarn 10 stops being transported for reasons other than yarn breakage, when the pressure-applying component has been started for a time t2 and the second infrared pair sensor 22 does not detect the position of the yarn 10 (the non-broken yarn 10 maintains a large elastic force and is not likely to have a large displacement), at this time, the second controller stops the pressure-applying component, and then waits for the yarn 10 to continue to start being transported to restore the tension and position.

[0072] It should be noted that both the third infrared pair sensor 23 and the first infrared pair sensor 21 can send on-off start signals to the second controller, and the start of the servo motor is mainly based on the signal sent first by either the third infrared pair sensor 23 or the first infrared pair sensor 21. After the servo motor starts, any signal sent later by the third infrared pair sensor 23 or the first infrared pair sensor 21 will not extend the continuous time of the servo motor, thus avoiding the situation of excessive tension of the yarn 10 caused by the servo motor lasting for too long.

[0073] If the yarn 10 stops being transported due to yarn breakage, it means that the yarn 10 has a large displacement amount. Therefore, within the time t2 after the pressure-applying component is started, the swing frame 3 can move the yarn 10 to the position of the second infrared pair sensor 22. When the second infrared pair sensor 22 detects the position of the yarn 10, the second controller stops the pressure-applying component.

[0074] In summary, through the comprehensive detection of the first infrared pair sensor 21 and the yarn speed detection component, both the slack condition and the stopped conveying condition of the yarn 10 can be detected. Moreover, with the secondary confirmation of the pressing component, the specific breakage condition of the yarn 10 can be further confirmed, that is, the detection accuracy of the breakage of the yarn 10 is greatly improved.

[0075] Embodiment 4 The difference between Embodiment 4 and Embodiment 3 is that, as Figure 10 shown, the air cylinder 6 is horizontally arranged and fixedly connected to the fixed seat 1, and the air cylinder 6 is located on the front side of the first guide roller 33.

[0076] The inner peripheral surface of the air outlet pipe 64 is covered with a black coating, and the surface of the light plate 65 facing the outlet direction of the air outlet pipe 64 is provided with a reflective layer (not shown in the figure).

[0077] As Figure 11 、 Figure 12 shown, the transmitting part 231 is located on the inner top surface of the air outlet pipe 64, the receiving part 232 is located on the inner top surface of the air outlet pipe 64, the transmitting part 231 is arranged closer to the outlet of the air outlet pipe 64 relative to the light plate 65, and the receiving part 232 is arranged closer to the outlet of the air outlet pipe 64 relative to the transmitting part 231.

[0078] When the yarn 10 is normally traction-conveyed, the light plate 65 is in a vertical state, the receiving part 232 cannot receive the infrared rays from the transmitting part 231, and the air inlet pipe 63 continuously blows a small flow of air into the air cylinder 6. Since when the yarn 10 is traction-conveyed, the yarn 10 moves rapidly in the second through hole 62, driving the air flow rate in the vicinity to increase, and the pressure at the position with a large flow rate is small. Therefore, the pressure difference in the second through hole 62 is smaller than that in the air cylinder 6, and the air flow blown in by the air inlet pipe 63 is discharged from the second through hole 62, and will not or only slightly trigger the deflection of the light plate 65.

[0079] When the yarn 10 breaks or temporarily stops conveying during the processing, that is, the yarn 10 stops conveying. At this time, the pressure in the second through hole 62 is substantially the same as the pressure in the air cylinder 6, and most of the air flow in the air inlet pipe 63 enters the air outlet pipe 64. The air flow blows the light plate 65, causing the light plate 65 to deflect. After the light plate 65 deflects by a large angle, the infrared rays of the transmitting part 231 are irradiated on the reflective layer, and the infrared rays of the reflective layer are reflected to the receiving part 232. When the receiving part 232 receives the infrared rays of the transmitting part 231 for t3 time, the second controller starts the pressing component, and the pressing component forces the swing frame 3 to deflect along the downward movement direction of the second guide roller 34, so as to drive the yarn 10 to move towards the position of the second infrared pair sensor 22, that is, to apply tension to the yarn 10.

[0080] If the yarn 10 stops being conveyed due to non-breaking reasons, when the pressing component starts for t2 time and the second infrared pair sensor 22 does not detect the position of the yarn 10 (the non-breaking yarn 10 maintains a large elastic force and is not prone to large displacement), at this time, the second controller stops the pressing component, and then waits for the yarn 10 to continue to start conveying to restore the tension and position.

[0081] If the yarn 10 stops being conveyed due to breaking reasons, it means that the yarn 10 has a large displacement. Therefore, within the t2 time when the pressing component starts, the swing frame 3 can move the yarn 10 to the position of the second infrared pair sensor 22. When the second infrared pair sensor 22 detects the position of the yarn 10, the second controller stops the pressing component.

[0082] Compared with Embodiment 3, in this embodiment, the cooperation position and cooperation logic between the emitting part 231 and the receiving part 232 are mainly changed. Its advantage is that in the case of no reflection of the light-emitting layer, the infrared ray of the emitting part 231 originally hits the inner bottom of the air outlet pipe 64. When reflected by the reflective layer of the deflected lightweight plate 65, as the angle of the reflective layer deflects more and more, the infrared ray of the emitting part 231 will sweep from the inner bottom of the air outlet pipe 64 to the inner top of the air outlet pipe 64, that is, the distance of the landing position of the infrared ray is magnified. In other words, the position setting range of the receiving part 232 can be relatively large. It can be understood that if the lightweight plate 65 deflects a small angle accidentally, even if the infrared ray is reflected by the lightweight plate 65, the distance between the landing point of the infrared ray and the position of the receiving part 232 is extremely large, thus reducing the occurrence of accidental induction of the receiving part 232 and greatly improving the detection accuracy.

[0083] Embodiment 5 The difference between Embodiment 5 and Embodiment 2 is that, as Figure 13 、 Figure 14 shown, the wire breakage detection device further includes a wire component 7. The wire component 7 is located at the rear side of the fixed seat 1, that is, the yarn 10 enters the wire component 7 after being guided by the second guide roller 34. The wire component 7 is used to guide and change the horizontal angle of the yarn 10.

[0084] The wire component 7 includes a bracket 71, a guide wheel 72, a magnetic block 73 and a magnetic ring 74. Among them, the guide wheel 72 is horizontally arranged, the middle part of the guide wheel 72 is connected to the end of the bracket 71 by a ball head, and the guide wheel 72 can deflect relative to the bracket 71. The yarn 10 bypasses the guide wheel 72. The magnetic block 73 is fixed on the bracket 71, and the magnetic block 73 is located directly above the part of the guide wheel 72 where the yarn 10 bypasses. The magnetic ring 74 is arranged on the upper surface of the guide wheel 72. The magnetic block 73 and the magnetic ring 74 are magnetically connected to keep the guide wheel 72 in a horizontal state for facilitating the normal guiding of the yarn 10.

[0085] When the yarn 10 breaks and the resistance on the front and back sides of the yarn 10 is large, making it difficult for the yarn 10 to have a large offset, under the action of the pressing component, the yarn 10 will be forced to offset, and the yarn 10 will also force the guide wheel 72 to deflect around its ball joint connection (the magnetic block 73 is separated from the magnetic ring 74). After the guide wheel 72 deflects a certain angle (see Figure 14 ), the yarn 10 will smoothly disengage from the guide wheel 72. At this time, the movement margin of the yarn 10 is larger, and the swing frame 3 can more easily drive the yarn 10 to trigger the second infrared pair sensor 22.

[0086] When the yarn 10 is not broken, the traction resistance on the front and back sides of the yarn 10 is extremely large. Even if the swing frame 3 drives the yarn 10 to offset, due to the tension and resistance of the yarn 10 itself, the offset of the yarn 10 is small and it is difficult for the yarn 10 to overcome the magnetic attraction between the magnetic block 73 and the magnetic ring 74. That is, the unbroken yarn 10 is not easy to drive the guide wheel 72 to deflect, and the yarn 10 is not easy to accidentally touch the second infrared pair sensor 22.

[0087] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A wire break detection device, characterized in that: The invention comprises a fixed seat (1), a swing frame (3), a first infrared counter-radiation sensor (21), a second infrared counter-radiation sensor (22) and a first controller, wherein the fixed seat (1) is provided with a vertical plate (11), the first infrared counter-radiation sensor (21) and the second infrared counter-radiation sensor (22) are both arranged on the vertical plate (11), and the first infrared counter-radiation sensor (21) is higher than the second infrared counter-radiation sensor (22); the swing frame (3) comprises a rotating shaft (35), a connecting rod (31) and a counterweight rod (32), the rotating shaft (35) is rotatably connected to the fixed seat (1), the counterweight rod (32) is L-shaped, the lower ends of the counterweight rod (32) and the connecting rod (31) are both fixed on the rotating shaft (35), and the upper end of the connecting rod (31) is provided with a The first guide roller (33) is provided on the upper end of the counterweight rod (32), and the second guide roller (34) is parallel to the rotating shaft (35). The yarn (10) passes horizontally through the first guide roller (33) and the second guide roller (34). The distance between the second guide roller (34) and the rotating shaft (35) is greater than the distance between the first guide roller (33) and the rotating shaft (35). The top of the first guide roller (33) abuts against the yarn (10), and the bottom of the second guide roller (34) abuts against the yarn (10). The first infrared counter-radiation sensor (21) is used to detect the position of the yarn (10) in a horizontal state, and the second infrared counter-radiation sensor (22) is used to detect the position of the yarn (10) in an inclined and relaxed state. The second infrared counter-radiation sensor (22) is electrically connected to the first controller.

2. The wire breakage detection device according to claim 1, characterized in that: The device also comprises a pressure component and a second controller, wherein the second controller is electrically connected to the pressure component and the first infrared counter-radiation sensor (21), respectively. When the first infrared counter-radiation sensor (21) fails to detect the position of the yarn (10) after a time t1, the second controller starts the pressure component, and the pressure component forces the swing frame (3) to deflect along the downward movement direction of the second guide roller (34) to drive the yarn (10) to move toward the position of the second infrared counter-radiation sensor (22). When the pressure component is started after a time t2 and the second infrared counter-radiation sensor (22) fails to detect the position of the yarn (10), the second controller stops the pressure component; when the pressure component is started after a time t2 and the second infrared counter-radiation sensor (22) detects the position of the yarn (10), the second controller stops the pressure component.

3. The wire breakage detection device according to claim 2, characterized in that: The pressure-applying assembly comprises a servo motor and a rubber roller (5). A rubber sleeve (53) is fixedly mounted on the rotating shaft (35). The servo motor is used to drive the rubber roller (5) to rotate. The outer peripheral surface of the rubber roller (5) comprises a flat surface portion (52) and an arc portion (51). The arc portion (51) is used to abut against the outer peripheral surface of the rubber sleeve (53). A movable gap is formed between the flat surface portion (52) and the outer peripheral surface of the rubber roller (5).

4. The wire breakage detection device according to claim 2 or 3, characterized in that: The yarn speed detection assembly also includes a yarn speed detection assembly, which includes an air cylinder (6), an air inlet pipe (63) and a third infrared radiation sensor (23), wherein the air cylinder (6) is horizontally penetrated by a first through hole (61) and a second through hole (62) for the yarn (10) to pass through, an air outlet pipe (64) is provided on the side wall where the second through hole (62) of the air cylinder (6) is located, the aperture of the second through hole (62) is smaller than that of the air outlet pipe (64), and the air inlet pipe (63) is connected to the first through hole (61) of the air cylinder (6). The side wall where the through hole (61) is located is connected, the cross section of the air outlet pipe (64) is semicircular, and a semicircular lightweight plate (65) whose shape is adapted to the inner peripheral surface of the air outlet pipe (64) is provided in the air outlet pipe (64), and the upper side of the lightweight plate (65) is hingedly connected to the inner peripheral surface of the air outlet pipe (64); the third infrared counter-radiation sensor (23) includes a transmitting part (231) and a receiving part (232), the transmitting part (231) is located on the inner top surface of the air outlet pipe (64), and the receiving part (232) is located on the inner top surface of the air outlet pipe (64). On the inner bottom surface of the air outlet pipe (64), when the light plate (65) is blown by the air flow and deflected to the area between the transmitting part (231) and the receiving part (232), the light plate (65) blocks the infrared rays of the transmitting part (231); the receiving part (232) is electrically connected to the second controller; when the receiving part (232) fails to receive the infrared rays of the transmitting part (231) after a time t3, the second controller starts the pressure component, and the pressure component forces the swing frame (3) to deflect along the downward movement direction of the second guide roller (34) to drive the yarn (10) to move toward the position of the second infrared counter-radiation sensor (22); when the pressure component is started after a time t2 and the second infrared counter-radiation sensor (22) fails to detect the position of the yarn (10), the second controller stops the pressure component; when the pressure component is started after a time t2 and the second infrared counter-radiation sensor (22) detects the position of the yarn (10), the second controller stops the pressure component.

5. The wire breakage detection device according to claim 4, characterized in that: The air cylinder (6) is fixedly connected to the first guide roller (33).

6. The wire breakage detection device according to claim 2 or 3, characterized in that: The yarn speed detection assembly also includes a yarn speed detection assembly, which includes an air cylinder (6), an air inlet pipe (63) and a third infrared radiation sensor (23), wherein the air cylinder (6) is arranged horizontally and is fixedly connected to the fixing seat (1), the air cylinder (6) is located in front of the first guide roller (33), and the air cylinder (6) is horizontally penetrated by a first through hole (61) and a second through hole (62) for the yarn (10) to pass through, and an air outlet pipe (64) is provided on the side wall where the second through hole (62) of the air cylinder (6) is located. The second through hole (62) has a smaller aperture than the air outlet pipe (64), the air inlet pipe (63) is connected to the side wall of the air cylinder (6) where the first through hole (61) is located, the cross section of the air outlet pipe (64) is semicircular, a semicircular light plate (65) whose shape matches the inner circumference of the air outlet pipe (64) is provided in the air outlet pipe (64), the upper side of the light plate (65) is hingedly connected to the inner circumference of the air outlet pipe (64), and a reflective layer is provided on the surface of the light plate (65) facing the outlet direction of the air outlet pipe (64); the third infrared counter-radiation sensor (23 ) comprises a transmitting part (231) and a receiving part (232), the transmitting part (231) and the receiving part (232) are both located in the air outlet pipe (64), the receiving part (232) is electrically connected to the second controller, the infrared rays of the transmitting part (231) are projected onto the reflective layer, when the lightweight plate (65) is blown by the airflow and deflected so that the infrared rays of the reflective layer are reflected onto the receiving part (232), and when the receiving part (232) receives the infrared rays of the transmitting part (231) for a period of time t3, the second controller starts the pressure applying component, The pressure component forces the swing frame (3) to deflect along the downward movement direction of the second guide roller (34) to drive the yarn (10) to move toward the position of the second infrared counter-radiation sensor (22); when the pressure component is started for a period of time t2 and the second infrared counter-radiation sensor (22) does not detect the position of the yarn (10), the second controller stops the pressure component; when the pressure component is started for a period of time t2 and the second infrared counter-radiation sensor (22) detects the position of the yarn (10), the second controller stops the pressure component.

7. The wire breakage detection device according to claim 6, characterized in that: The transmitting portion (231) is located on the inner top surface of the air outlet pipe (64), and the receiving portion (232) is located on the inner top surface of the air outlet pipe (64). The transmitting portion (231) is arranged close to the outlet of the air outlet pipe (64) relative to the lightweight plate (65), and the receiving portion (232) is arranged close to the outlet of the air outlet pipe (64) relative to the transmitting portion (231).

8. The wire breakage detection device according to claim 6, characterized in that: The inner circumferential surface of the air outlet pipe (64) is covered with a black coating.

9. The wire breakage detection device according to claim 2 or 3, characterized in that: The invention also comprises a conductor assembly (7), the conductor assembly (7) being located at the rear side of the fixing seat (1), the conductor assembly (7) comprising a bracket (71), a guide wheel (72), a magnetic block (73) and a magnetic ring (74), wherein the guide wheel (72) is arranged horizontally, the middle part of the guide wheel (72) is connected to the end ball head of the bracket (71), the yarn (10) passes around the guide wheel (72), the magnetic block (73) is located directly above the part of the guide wheel (72) through which the yarn (10) passes, the magnetic ring (74) is arranged on the guide wheel (72), and the magnetic block (73) and the magnetic ring (74) are connected by magnetic attraction.

10. A textile processing equipment, characterized in that: It comprises a wire feeding device, the wire breakage detection device according to claim 1, and a processing device, wherein the first controller is used to control the stopping of the processing device and the wire feeding device.

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