A broken line detection device and a textile processing equipment

Abstract

The application relates to a broken line detection device and textile processing equipment, which comprises a fixing base, a swing frame, a first infrared opposite radiation sensor, a second infrared opposite radiation sensor and a first controller; the swing frame comprises a rotating shaft, a connecting rod and a counterweight rod, the rotating shaft is rotationally connected with the fixing base, the counterweight rod is in an L shape, the lower ends of the counterweight rod and the connecting rod are fixed on the rotating shaft, the upper end of the connecting rod is provided with a first guide roller parallel to the rotating shaft, and the upper end of the counterweight rod is provided with a second guide roller parallel to the rotating shaft; the first infrared opposite radiation sensor is used for detecting the position of yarn in a horizontal state, and the second infrared opposite radiation sensor is used for detecting the position of yarn in a slanting and slack state. The application can improve the timeliness of broken line detection.

Description

Technical Field

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

[0002] During the operation of yarn processing equipment, the yarn may break due to the complex effects of various tension and pulling forces. In order to detect yarn breakage in time and reduce unnecessary losses, it is often necessary to install a yarn breakage detection device.

[0003] Existing yarn breakage detection devices often use infrared beam sensors to detect whether a yarn has passed through. When no yarn is detected, the textile equipment is stopped.

[0004] However, when the yarn breaks at the rear of the yarn breakage detection device, the yarn can remain in the same position for a certain period of time. The yarn can only be detected after the textile equipment has been running for a while and the yarn has more room to move. In other words, this detection method is delayed and it is difficult to detect in a timely manner. Summary of the Invention

[0005] To improve the timeliness of detection, this application provides a thread breakage detection device and textile processing equipment.

[0006] This application provides a wire breakage detection device, which adopts the following technical solution: A yarn breakage detection device includes a fixed base, a swing frame, a first infrared beam sensor, a second infrared beam sensor, and a first controller. The fixed base has a vertical plate, and both the first and second infrared beam sensors are mounted on the vertical plate, with the first infrared beam sensor higher than the second infrared beam sensor. The swing frame includes a rotating shaft, a connecting rod, and a counterweight rod. The rotating shaft is rotatably connected to the fixed base. The counterweight rod is L-shaped, and the lower ends of both the counterweight rod and the connecting rod are fixed to the rotating shaft. The upper end of the connecting rod has a first guide roller parallel to the rotating shaft, and the upper end of the counterweight rod has a second guide roller parallel to the rotating shaft. The yarn passes horizontally through the first and second guide rollers. 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 beam sensor is used to detect the position of the yarn in a horizontal state, and the second infrared beam sensor is used to detect the position of the yarn in a tilted or slack state. The second infrared beam sensor is electrically connected to the first controller.

[0007] By adopting the above technical solution, the weight of the counterweight rod is greater than that of the connecting rod. Under the action of gravity, the counterweight rod applies a certain pressure to the yarn, forming yarn tension and ensuring that the yarn is at the detection position of the first infrared through-beam sensor. When the yarn breaks and slackens, under the action of the counterweight rod, the swing frame deflects, and the first and second guide rollers drive the yarn downwards, causing the yarn to leave the first infrared through-beam sensor. The second infrared through-beam sensor detects the deviated yarn and transmits a signal to the first controller. The first controller then controls the processing equipment to stop, thereby reducing losses caused by untimely detection.

[0008] By setting up a first infrared beam sensor and a second infrared beam sensor, when the yarn becomes slack due to insufficient traction during the yarn transport process (i.e., slack caused by reasons other than yarn breakage), although the first infrared beam sensor will be triggered, the degree of slack caused by reasons other than yarn breakage is small, and the yarn offset distance is limited, so it cannot trigger the second infrared beam sensor. This can greatly improve the detection accuracy and reduce false sensing.

[0009] Secondly, by setting the specific shape of the swing frame and utilizing the lever principle, the offset distance of the yarn is amplified, thereby indirectly increasing the distance between the first infrared beam sensor and the second infrared beam sensor, thus reducing the likelihood of the yarn accidentally triggering the second infrared beam sensor due to accidental slackness.

[0010] Optionally, the system also includes a pressure application component and a second controller. The second controller is electrically connected to both the pressure application component and the first infrared photoelectric sensor. After time t1 when the first infrared photoelectric sensor fails to detect the yarn position, the second controller activates the pressure application component. The pressure application component forces the swing frame to deflect along the downward direction of the second guide roller, thereby moving the yarn toward the position of the second infrared photoelectric sensor. After time t2 when the pressure application component is activated, and the second infrared photoelectric sensor fails to detect the yarn position, the second controller stops the pressure application component. If the pressure application component is activated within time t2 and the second infrared photoelectric sensor detects the yarn position, the second controller stops the pressure application component.

[0011] When a yarn breaks, it is subjected to traction or tension forces as it passes through multiple conveyor rollers, making it difficult or only slightly loose. By employing the above-mentioned technical solution and setting up a pressure-applying component, when a small amplitude of yarn movement is detected, the pressure-applying component is activated to force the swing frame to deflect in the downward direction of the second guide roller, thereby moving the yarn toward the position of the second infrared beam sensor. In other words, the yarn is forced to deflect. If the yarn is indeed broken, under the application of a large force, the yarn will counteract the traction or tension forces of other conveyor rollers, causing the yarn to deflect a large distance, thus triggering the detection of the second infrared beam sensor to complete the yarn breakage detection.

[0012] When the yarn is not broken, i.e. when it is relaxed due to reasons other than yarn breakage, the yarn is stretched by its own elasticity during the limited start time of the pressure component, thereby reducing the occurrence of yarn breakage due to the continuous start of the pressure component.

[0013] Optionally, the pressure application component includes a servo motor and a rubber roller. A rubber sleeve is fixedly fitted 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 an movable gap with the outer peripheral surface of the rubber roller.

[0014] By adopting the above technical solution, firstly, by setting the arc part and the rubber sleeve to cooperate, the friction force is used to drive the swing frame to shift. This friction force is relatively gentle and will not damage the yarn too much. Furthermore, when the yarn is loose due to reasons other than breakage, the elasticity of the yarn will stretch to a certain extent and offset the friction force between the arc part and the rubber sleeve, thereby preventing the swing frame from shifting, which further reduces the damage to the yarn.

[0015] Secondly, by setting up a flat section and utilizing the movable gap, the rotating shaft is in a free state. Therefore, in the unpressurized state, the swing frame is only subjected to gravity, and the yarn is also subjected to the tension converted from gravity. The yarn is subjected to less force, the yarn damage is less, and the yarn traction is smoother.

[0016] Secondly, when the pressure-applying component stops, the flat part is opposite to the rubber sleeve, which also puts the rotating shaft in a free state. At this time, under the elastic recovery of the yarn, the elastic force of the yarn will drive the swing frame to reset, thereby facilitating the normal traction and transportation of the yarn.

[0017] Optionally, a yarn speed detection component is also included. This component comprises an air cylinder, an air inlet pipe, and a third infrared through-beam sensor. The air cylinder has a first through-hole and a second through-hole for yarn passage. An air outlet pipe is located on the side wall of the second through-hole, with the diameter of the second through-hole being smaller than that of the air outlet pipe. The air inlet pipe communicates with the side wall of the first through-hole of the air cylinder. The air outlet pipe has a semi-circular cross-section and contains a semi-circular lightweight plate with a shape adapted to the inner circumference of the air outlet pipe. The upper side of the lightweight plate is hinged to the inner circumference of the air outlet pipe. The third infrared through-beam sensor includes a transmitter and a receiver. The transmitter is located on the inner top surface of the air outlet pipe, and the receiver is located on the inner bottom surface of the air outlet pipe. When the lightweight plate is... When the airflow is blown and deflected to the area between the emitting and receiving parts, the lightweight plate blocks the infrared rays from the emitting part. The receiving part is electrically connected to the second controller. After time t3 when the receiving part does not receive the infrared rays from the emitting part, the second controller activates the pressure application component. The pressure application component forces the swing frame to deflect along the downward direction of the second guide roller, thereby driving the yarn towards the position of the second infrared beam sensor. After time t2 when the pressure application component is activated, and the second infrared beam sensor does not detect the yarn position, the second controller stops the pressure application component. When time t2 when the pressure application component is activated and the second infrared beam sensor detects the yarn position, the second controller stops the pressure application component.

[0018] By adopting the above technical solution, when the yarn is being normally pulled and conveyed, the receiving part continuously receives infrared rays from the transmitting part, and the air inlet pipe continuously blows a small flow of air into the air cylinder. As the yarn moves rapidly in the second through hole during the pulling and conveying process, it increases the air velocity in the vicinity. Since the pressure is low at the location of high velocity, the pressure difference in the second through hole is smaller than that in the air cylinder. The airflow blown in by the air inlet pipe is discharged from the second through hole and will not or can only slightly trigger the displacement of the lightweight plate.

[0019] When the yarn stops feeding due to breakage or temporary cessation of the processing, the pressure inside the second through hole is roughly the same as the pressure inside the air cylinder. Most of the airflow in the inlet pipe enters the outlet pipe, blowing the lightweight plate and causing it to deflect. After the lightweight plate deflects to a large angle, it blocks the infrared rays emitted by the transmitter. After time t3 when the receiver stops receiving the infrared rays from the transmitter, the second controller activates the pressure application component. The pressure application component forces the swing frame to deflect along the downward direction of the second guide roller, thereby moving the yarn toward the position of the second infrared beam sensor, thus applying tension to the yarn. If the yarn stops feeding for reasons other than breakage, after time t2 when the pressure application component is activated and the second infrared beam sensor does not detect the yarn position (non-broken yarn maintains greater elasticity and is less prone to large-distance deviation), the second controller stops the pressure application component. Then, the yarn feeding resumes to restore tension and position.

[0020] If the yarn stops being fed due to a breakage, the yarn has a large displacement. When the pressure component starts, within t2 hours, the swing frame can move the yarn to the second infrared photoelectric sensor. When the second infrared photoelectric sensor detects the yarn position, the second controller stops the pressure 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 breakage in the yarn, the swing frame begins to shift, and the air cylinder shifts accordingly, increasing the tilt angle of the lightweight plate. This makes the lightweight plate's blocking of infrared rays more stable, reducing the small-amplitude swaying of the lightweight plate caused by vibration, which could lead to incorrect infrared reception.

[0023] Optionally, a yarn speed detection component is also included. This component comprises an air cylinder, an air inlet pipe, and a third infrared through-beam sensor. The air cylinder is horizontally positioned and fixedly connected to the fixed base. The air cylinder is located in front of the first guide roller. The air cylinder has a first through-hole and a second through-hole for yarn passage. An air outlet pipe is provided on the side wall where the second through-hole is located. The diameter of the second through-hole is smaller than that of the air outlet pipe. The air inlet pipe communicates with the side wall where the first through-hole is located. The air outlet pipe has a semi-circular cross-section. A semi-circular lightweight plate with a shape adapted to the inner circumference of the air outlet pipe is provided inside the air outlet pipe. The upper side of the lightweight plate is hinged to the inner circumference of the air outlet pipe. A reflective layer is provided on the surface of the lightweight plate facing the outlet direction of the air outlet pipe. The third infrared through-beam sensor includes a transmitter and a receiver. Both the transmitting and receiving parts are located inside the air outlet pipe. The receiving part is electrically connected to the second controller. The infrared rays from the transmitting part are projected onto the reflective layer. When the lightweight plate is deflected by the airflow, the infrared rays from the reflective layer are reflected onto the receiving part. After the receiving part receives the infrared rays from the transmitting part for time t3, the second controller activates the pressure application component. The pressure application component forces the swing frame to deflect along the downward direction of the second guide roller, thereby moving the yarn toward the position of the second infrared beam sensor. After the pressure application component is activated for time t2, and the second infrared beam sensor does not detect the yarn position, the second controller stops the pressure application component. If the pressure application component is activated within time t2 and the second infrared beam sensor detects the yarn position, the second controller stops the pressure application component.

[0024] By adopting the above technical solution, when the yarn is being normally pulled and conveyed, the lightweight plate is in a vertical state, and the receiving part cannot receive infrared rays from the transmitting part. The air inlet pipe continuously blows a small flow of air into the air cylinder. Because the yarn moves rapidly in the second through hole during the yarn pulling and conveying, it increases the air velocity in the vicinity. Since the pressure is low where the velocity is high, the pressure difference in the second through hole is smaller than that in the air cylinder. The airflow blown in by the air inlet pipe is discharged from the second through hole and will not or can only slightly trigger the displacement of the lightweight plate.

[0025] When the yarn stops feeding due to breakage or temporary cessation of the processing, the pressure inside the second through hole is roughly the same as the pressure inside the air cylinder. Most of the airflow in the inlet pipe enters the outlet pipe, blowing the lightweight plate and causing it to deflect. After the lightweight plate deflects to a large angle, the infrared rays from the emitting part hit the reflective layer, which reflects the infrared rays back to the receiving part. When the receiving part receives the infrared rays from the emitting part for time t3, the second controller activates the pressure application component. The pressure application component forces the swing frame to deflect along the downward direction of the second guide roller, thereby moving the yarn toward the position of the second infrared beam sensor, thus applying tension to the yarn. If the yarn stops feeding for reasons other than breakage, when the pressure application component is activated for time t2 and the second infrared beam sensor does not detect the yarn position (non-broken yarn maintains greater elasticity and is less prone to large-distance deviation), the second controller stops the pressure application component. Then, the yarn feeding resumes to restore tension and position.

[0026] If the yarn stops being fed due to a breakage, the yarn has a large displacement. When the pressure component starts, within t2 hours, the swing frame can move the yarn to the second infrared photoelectric sensor. When the second infrared photoelectric sensor detects the yarn position, the second controller stops the pressure component.

[0027] Optionally, the transmitting part is located on the inner top surface of the air outlet pipe, the receiving part is located on the inner top surface of the air outlet pipe, the transmitting part is disposed relative to the lightweight plate near the outlet of the air outlet pipe, and the receiving part is disposed relative to the transmitting part near the outlet of the air outlet pipe.

[0028] By adopting the above technical solution and setting the relative positions of the transmitter and receiver, it can be concluded that the infrared rays originally emitted by the transmitter are directed to the bottom of the outlet pipe. However, when reflected by the reflective layer of the deflected lightweight plate, the infrared rays will sweep from the bottom of the outlet pipe to the top. This means that the distance between the landing point and the infrared rays is magnified. Consequently, the position range of the receiver can be relatively large. This can be understood as follows: if the lightweight plate is accidentally deflected by a small angle, even if the infrared rays are reflected, the difference between the landing point of the infrared rays and the position of the receiver will be extremely large, thereby reducing the occurrence of accidental sensing by the receiver and greatly improving the detection accuracy.

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

[0030] By adopting the above technical solution, the light-absorbing properties of the black coating are utilized to reduce accidental reflection of infrared rays.

[0031] Optionally, it also includes a wire assembly located on the rear side of the fixing base. The wire assembly includes a bracket, a guide wheel, a magnet, and a magnetic ring. The guide wheel is horizontally arranged, and the middle part of the guide wheel is connected to the end ball of the bracket. The yarn passes around the guide wheel. The magnet is located directly above the part of the guide wheel where the yarn passes around. The magnetic ring is disposed on the guide wheel, and the magnet and the magnetic ring are magnetically connected.

[0032] By adopting the above technical solution, the conductor assembly is used to maintain the stability of 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, the pressure component will force the yarn to deflect. The yarn will also force the guide wheel to deflect around its own ball joint (the magnetic block and the magnetic ring separate). After the guide wheel deflects at a certain angle, the yarn will naturally detach from the guide wheel. At this time, the yarn has a larger margin of movement and the yarn is more likely to trigger the second infrared beam sensor.

[0033] When the yarn is intact, the traction resistance on the front and back sides of the yarn is extremely large, and the yarn can hardly overcome the magnetic attraction between the magnetic block and the magnetic ring. In other words, the yarn will not easily drive the guide wheel to deflect, and the yarn will not easily accidentally touch the second infrared photoelectric sensor.

[0034] This application provides a textile processing equipment, which adopts the following technical solution: A textile processing device includes a thread feeding device, a thread breakage detection device, and a processing device, wherein the first controller is used to control the stopping of the processing device and the thread feeding device.

[0035] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up a first infrared through-beam sensor and a second infrared through-beam sensor, when the yarn loosens due to insufficient traction during the yarn conveying process, i.e., loosening caused by reasons other than yarn breakage, although it will trigger the first infrared through-beam sensor, the degree of loosening caused by reasons other than yarn breakage is small and the yarn offset distance is limited, so it cannot trigger the second infrared through-beam sensor. This can greatly improve the detection accuracy and reduce false sensing. 2. By setting up a pressure application component, when the yarn is sensed to move slightly, the pressure application component is activated to force the swing frame to deflect in the downward direction of the second guide roller, thereby driving the yarn toward the position of the second infrared beam sensor, that is, forcing the yarn to deflect. If the yarn is indeed broken, when a large force is applied, the yarn will counteract the traction or tension of other conveying rollers, and the yarn will deflect a large distance, thereby triggering the second infrared beam sensor to detect the yarn breakage. 3. By setting up a yarn speed detection component, the system can detect yarns that are not moving, including both yarn slack and yarn stoppage. Combined with secondary confirmation from the pressure application component, the system can further confirm the specific yarn breakage situation, thus greatly improving the accuracy of yarn breakage detection. Attached Figure Description

[0036] Figure 1 This is a cross-sectional view of the wire breakage detection device of Embodiment 1.

[0037] Figure 2 This is a schematic diagram of the yarn breakage detection device in Example 1 in the yarn offset state.

[0038] Figure 3 This is a cross-sectional view of the wire breakage detection device in Embodiment 2.

[0039] Figure 4 This is a schematic diagram of the yarn breakage detection device in Example 2 in the yarn offset state.

[0040] Figure 5 This is a cross-sectional view of the wire breakage detection device in Embodiment 3.

[0041] Figure 6 This is a cross-sectional view of the air cylinder in the yarn conveying state of Example 3.

[0042] Figure 7 yes Figure 6 A magnified view of a portion of point A in the middle.

[0043] Figure 8 This is a schematic diagram of the lightweight plate of Example 3.

[0044] Figure 9 This is a cross-sectional view of the air cylinder in the yarn-stopped feeding state of Example 3.

[0045] Figure 10 This is a cross-sectional view of the wire breakage detection device in Example 4.

[0046] Figure 11 This is a cross-sectional view of the air cylinder in the yarn-stopped feeding state of Example 4.

[0047] Figure 12 yes Figure 11 A magnified view of a section at point B.

[0048] Figure 13 This is a schematic diagram of the wire assembly in Embodiment 5.

[0049] Figure 14 This is a diagram showing the positional change of the guide wheel in Example 5 from a horizontal state to an inclined state.

[0050] Explanation of reference numerals in the attached drawings: 1. Fixed base; 3. Swing frame; 5. Rubber roller; 6. Air cylinder; 7. Wire assembly; 10. Yarn; 11. Vertical plate; 12. Clearance groove; 21. First infrared beam sensor; 22. Second infrared beam sensor; 23. Third infrared beam sensor; 231. Transmitter; 232. Receiver; 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. Lightweight plate; 66. Hinge; 71. Bracket; 72. Guide wheel; 73. Magnetic block; 74. Magnetic ring. Detailed Implementation

[0051] The following is in conjunction with the appendix Figure 1-14 This application will be described in further detail.

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

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

[0054] like Figure 1 , Figure 2 As shown, the system includes a fixed base 1, a swing frame 3, a first infrared beam sensor 21, a second infrared beam sensor 22, and a first controller (not shown). The top of the fixed base 1 has two opposing upright plates 11, forming an area between the two upright plates 11 for the yarn 10 to pass through. The first infrared beam sensor 21 and the second infrared beam sensor 22 are both located on the upright plates 11. Specifically, the emitting structure of the first infrared beam sensor 21 and the second infrared beam sensor 22 is located on one of the upright plates 11, and the receiving structure of the first infrared beam sensor 21 and the second infrared beam sensor 22 is located on the other upright plate 11. The infrared emission direction of the first infrared beam sensor 21 and the second infrared beam sensor 22 is the opposite direction of the two upright plates 11, and the first infrared beam sensor 21 is higher than the second infrared beam sensor 22.

[0055] The swing frame 3 includes a rotating shaft 35, a connecting rod 31, and a counterweight rod 32. The axis of the rotating shaft 35 is in the opposite direction of the two upright plates 11. The rotating shaft 35 is rotatably connected to the fixed base 1. The counterweight rod 32 is L-shaped. The lower ends of the counterweight rod 32 and the connecting rod 31 are both fixed to 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 distance is such that 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. Under normal conveying conditions, 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. Since the weight of the counterweight rod 32 is greater than the weight of the connecting rod 31, the counterweight rod 32 applies a certain pressure to the yarn 10 under the action of gravity, forming tension in the yarn 10 and ensuring that the yarn 10 is at the detection position of the first infrared beam sensor 21, which is used to detect the position of the horizontal yarn 10. Furthermore, 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 collision interference between the swing frame 3 and the fixed base 1, an avoidance groove 12 is also provided on the upper surface of the fixed base 1.

[0056] The second infrared through-beam sensor 22 is used to detect the position of the yarn 10 in a tilted and slack state. The second infrared through-beam sensor 22 is electrically connected to the first controller, which is used to control the stopping of the processing device and the yarn feeding device.

[0057] When the yarn 10 breaks and becomes loose, the swing frame 3 deflects under the gravity of the counterweight 32. The first guide roller 33 and the second guide roller 34 drive the yarn 10 to shift downward. The second infrared photoelectric sensor 22 detects the shifted yarn 10 and transmits a signal to the first controller. The first controller then controls the processing device and the yarn feeding device to stop, thereby reducing the loss caused by the failure to detect in time.

[0058] Secondly, by setting up a first infrared through-beam sensor 21 and a second infrared through-beam sensor 22, when the yarn 10 becomes slack due to insufficient traction during the conveying process, i.e. slack caused by reasons other than yarn breakage, although the first infrared through-beam sensor 21 will be triggered, the degree of slack caused by reasons other than yarn breakage is small, and the offset distance of the yarn 10 is limited, so it cannot trigger the second infrared through-beam sensor 22. This can greatly improve the detection accuracy and reduce false sensing.

[0059] Example 2 The difference between Example 2 and Example 1 is that, as Figure 3 , Figure 4 As shown, the wire breakage detection device also includes a pressure application component and a second controller (not shown in the figure). The pressure application 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 beam sensor 21, respectively.

[0060] A rubber sleeve 53 is fixedly fitted 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 part 52 and an arc part 51. The arc part 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, the flat part 52 of the rubber roller 5 and the outer peripheral surface of the rubber sleeve 53 form an active gap to ensure that the swing frame 3 is in a free and rotatable state.

[0061] When yarn 10 breaks, it is subjected to a certain traction or tension force due to passing through multiple conveying rollers. This makes it difficult for yarn 10 to loosen or only loosen to a small extent. In other words, if yarn 10 loosens so that the first infrared photoelectric sensor 21 cannot detect the position of yarn 10, there are two possibilities: one is that yarn 10 breaks and loosens, and the other is that yarn 10 loosens during conveying. In the second case, under the tension applied by the swing frame 3, yarn 10 is also difficult to loosen and thus cannot trigger the second infrared photoelectric sensor 22.

[0062] Therefore, when the yarn 10 is slack, after calculating time t1 from the point when the first infrared photoelectric sensor 21 can no longer detect the position of the yarn 10, t1 is 0.1-3s. The second controller starts the servo motor, the rubber roller 5 rotates, and the rubber roller 5 uses friction to drive the rotating shaft 35, thereby driving the swing frame 3 to deflect along the downward direction of the second guide roller 34, so as to drive the yarn 10 to move toward the position of the second infrared photoelectric sensor 22, that is, to force the yarn 10 to deflect, and the start-up duration t2 of the servo motor is limited, which is 2-5s.

[0063] If yarn 10 is indeed broken, when a large force is applied, yarn 10 will counteract the traction or tension of other conveying rollers, and yarn 10 will shift by a large distance, thereby triggering the second infrared photoelectric sensor 22 to detect the breakage. That is, when the servo motor starts within t2 time and the second infrared photoelectric sensor 22 detects the position of yarn 10, the second controller stops the servo motor.

[0064] If the servo motor continues to run for time t2 when the yarn 10 is not broken (i.e., when it is loose due to reasons other than yarn breakage), during this running time, although the swing frame 3 continuously increases the tension of the yarn 10, the yarn 10 is stretched by its own elasticity, thereby reducing the occurrence of the yarn 10 being torn due to the continuous running of the servo motor. Furthermore, the elasticity of the yarn 10 will offset the friction between the arc portion 51 and the rubber sleeve 53 to a certain extent, thereby preventing the swing frame 3 from deviating, that is, further reducing the damage to the yarn 10.

[0065] Therefore, when the servo motor starts for time t2 and the second infrared beam sensor 22 does not detect the position of the yarn 10, the second controller stops the servo motor. When the rubber roller 5 stops, the flat part 52 is opposite to the rubber sleeve 53, which also makes the rotating shaft 35 free. At this time, under the elastic recovery of the yarn 10, the elastic force of the yarn 10 will drive the swing frame 3 to reset, thereby facilitating the subsequent normal traction and conveying of the yarn 10.

[0066] Example 3 The difference between Example 3 and Example 2 is that, as Figure 5 , Figure 6 As shown, the yarn breakage detection device also includes a yarn speed detection component, which includes an air cylinder 6, an air inlet pipe 63, and a third infrared beam sensor 23. The air cylinder 6 is fixedly connected to the first guide roller 33. The air cylinder 6 has a first through hole 61 and a second through hole 62 through which the yarn 10 passes. 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 diameter of the second through hole 62 is smaller than that of the air outlet pipe 64. The air inlet pipe 63 is connected to the side wall where the first through hole 61 of the air cylinder 6 is located. The cross-section of the air outlet pipe 64 is semi-circular. Furthermore, the air outlet pipe 64 and the second through hole 62 are symmetrically arranged with the air inlet pipe 63 as the center.

[0067] like Figure 7 , Figure 8 As shown, a semi-circular lightweight plate 65 with a shape adapted to the inner circumference of the air outlet pipe 64 is provided inside the air outlet pipe 64. The upper side of the lightweight plate 65 is hinged to the inner top surface of the air outlet pipe 64 through a hinge 66. The lightweight plate 65 can be made of plastic sheet or cardboard.

[0068] The third infrared beam sensor 23 includes a transmitter 231 and a receiver 232. The transmitter 231 is located on the inner top surface of the exhaust pipe 64, and the receiver 232 is located on the inner bottom surface of the exhaust pipe 64. The receiver 232 is electrically connected to the second controller. The transmitter 231 emits infrared rays vertically downward, and the receiver 232 continuously receives infrared rays.

[0069] like Figure 6As shown, when the yarn 10 is being normally pulled and conveyed, the receiving unit 232 continuously receives infrared rays from the transmitting unit 231, and the air inlet pipe 63 continuously blows a small flow of air into the air cylinder 6. Because the yarn 10 moves rapidly in the second through hole 62 when it is being pulled and conveyed, it increases the air velocity in the vicinity. Since the pressure is low at the location with high velocity, the pressure difference in the second through hole 62 is smaller than that in the air cylinder 6. The airflow blown in by the air inlet pipe 63 is discharged from the second through hole 62 and will not or can only slightly trigger the offset of the lightweight plate 65.

[0070] like Figure 9 As shown, when the yarn 10 stops feeding due to breakage or temporary cessation of the processing, the pressure inside the second through hole 62 is roughly the same as the pressure inside the air cylinder 6. Most of the airflow in the air inlet pipe 63 enters the air outlet pipe 64. The airflow blows the lightweight plate 65, causing it to deflect. After the lightweight plate 65 deflects at a large angle, it blocks the infrared rays emitted by the transmitter 231. After the receiver 232 has not received the infrared rays from the transmitter 231 for a time t3 (0.1-3s), the second controller activates the pressure application component. The pressure application component forces the swing frame 3 to deflect along the downward direction of the second guide roller 34, thereby moving the yarn 10 toward the position of the second infrared beam sensor 22, i.e., applying tension to the yarn 10.

[0071] If the yarn 10 stops feeding due to reasons other than a broken yarn, after the pressure component starts for time t2 and the second infrared photoelectric sensor 22 does not detect the position of the yarn 10 (the non-broken yarn 10 maintains a large elasticity and is not prone to large displacement), the second controller stops the pressure component and then waits for the yarn 10 to start feeding again to restore tension and position.

[0072] It should be noted that both the third infrared photoelectric sensor 23 and the first infrared photoelectric sensor 21 can send on / off start signals to the second controller. The servo motor is started primarily by the signal sent first by either the third infrared photoelectric sensor 23 or the first infrared photoelectric sensor 21. Once the servo motor is started, any subsequent signal sent by either the third infrared photoelectric sensor 23 or the first infrared photoelectric sensor 21 will not prolong the duration of the servo motor, thereby avoiding excessive tension in the yarn 10 due to the servo motor running for too long.

[0073] If the yarn 10 stops feeding due to a breakage, it means that the yarn 10 has a large displacement. Therefore, within t2 time after the pressure component starts, the swing frame 3 can move the yarn 10 to the second infrared photoelectric sensor 22. When the second infrared photoelectric sensor 22 detects the position of the yarn 10, the second controller stops the pressure component.

[0074] In summary, through the combined detection of the first infrared beam sensor 21 and the yarn speed detection component, both the slack condition and the stoppage of the yarn 10 can be detected. Furthermore, by combining the secondary confirmation of the pressure application component, the specific yarn breakage condition of the yarn 10 can be further confirmed, thus greatly improving the accuracy of yarn breakage detection.

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

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

[0077] like Figure 11 , Figure 12 As shown, the transmitter 231 is located on the inner top surface of the exhaust pipe 64, and the receiver 232 is located on the inner top surface of the exhaust pipe 64. The transmitter 231 is disposed relative to the lightweight plate 65 near the outlet of the exhaust pipe 64, and the receiver 232 is disposed relative to the transmitter 231 near the outlet of the exhaust pipe 64.

[0078] When the yarn 10 is being normally pulled and conveyed, the lightweight plate 65 is in a vertical position, and the receiving part 232 cannot receive the infrared rays from the transmitting part 231. The air inlet pipe 63 continuously blows a small flow of air into the air cylinder 6. Because the yarn 10 moves rapidly in the second through hole 62 when it is being pulled and conveyed, it increases the air velocity in the vicinity. Since the pressure is low at the location of high velocity, the pressure difference in the second through hole 62 is smaller than that in the air cylinder 6. The airflow blown in by the air inlet pipe 63 is discharged from the second through hole 62 and will not or can only slightly trigger the offset of the lightweight plate 65.

[0079] When the yarn 10 stops feeding due to breakage or temporary cessation of the processing, the pressure inside the second through hole 62 is roughly the same as the pressure inside the air cylinder 6. Most of the airflow in the air inlet pipe 63 enters the air outlet pipe 64. The airflow blows the lightweight plate 65, causing it to deflect. After the lightweight plate 65 deflects at a large angle, the infrared rays from the emitting part 231 hit the reflective layer, and the infrared rays from the reflective layer are reflected to the receiving part 232. When the receiving part 232 receives the infrared rays from the emitting part 231 for a time t3, the second controller activates the pressure application component. The pressure application component forces the swing frame 3 to deflect in the downward direction of the second guide roller 34, thereby moving the yarn 10 toward the position of the second infrared beam sensor 22, that is, applying tension to the yarn 10.

[0080] If the yarn 10 stops feeding due to reasons other than a broken yarn, after the pressure component starts for time t2 and the second infrared photoelectric sensor 22 does not detect the position of the yarn 10 (the non-broken yarn 10 maintains a large elasticity and is not prone to large displacement), the second controller stops the pressure component and then waits for the yarn 10 to start feeding again to restore tension and position.

[0081] If the yarn 10 stops feeding due to a breakage, it means that the yarn 10 has a large displacement. Therefore, within t2 time after the pressure component starts, the swing frame 3 can move the yarn 10 to the second infrared photoelectric sensor 22. When the second infrared photoelectric sensor 22 detects the position of the yarn 10, the second controller stops the pressure component.

[0082] Compared to Embodiment 3, this embodiment mainly changes the matching position and matching logic of the emitting unit 231 and the receiving unit 232. Its advantage is that, in the absence of reflection from the light-emitting layer, the infrared rays of the emitting unit 231 originally hit the inner bottom of the exhaust pipe 64. However, when reflected by the reflective layer of the deflected lightweight plate 65, as the angle of the reflective layer deflects larger, the infrared rays of the emitting unit 231 will sweep from the inner bottom of the exhaust pipe 64 to the inner top of the exhaust pipe 64. That is, the distance of the landing point of the infrared rays is amplified. In effect, the position setting range of the receiving unit 232 can be relatively large. It can be understood that if the lightweight plate 65 is deflected by a small angle due to accident, even if the infrared rays are reflected by the lightweight plate 65, the landing point of the infrared rays will be far from the position of the receiving unit 232, thereby reducing the occurrence of accidental sensing by the receiving unit 232 and greatly improving the detection accuracy.

[0083] Example 5 The difference between Example 5 and Example 2 is that, as Figure 13 , Figure 14 As shown, the yarn breakage detection device also includes a wire assembly 7, which is located on the rear side of the fixed base 1. That is, the yarn 10 enters the wire assembly 7 after being guided by the second guide roller 34. The wire assembly 7 is used to guide and change the horizontal angle of the yarn 10.

[0084] The conductor assembly 7 includes a bracket 71, a guide wheel 72, a magnet 73, and a magnetic ring 74. The guide wheel 72 is horizontally positioned, and its middle part is connected to the ball end of the bracket 71. The guide wheel 72 can deflect relative to the bracket 71, and the yarn 10 passes around the guide wheel 72. The magnetic block 73 is fixed on the bracket 71 and is located directly above the part of the guide wheel 72 where the yarn 10 passes. The magnetic ring 74 is located on the upper surface of the guide wheel 72. The magnetic block 73 and the magnetic ring 74 are magnetically connected so that the guide wheel 72 remains horizontal so as to guide the yarn 10 normally.

[0085] When yarn 10 breaks and the resistance on the front and rear sides of yarn 10 is large, making it difficult for yarn 10 to deviate significantly, the pressure-applying component will force yarn 10 to deviate. Yarn 10 will also force guide wheel 72 to deflect around its own ball joint (magnetic block 73 and magnetic ring 74 separate). After guide wheel 72 deflects at a certain angle (see...), Figure 14 When the yarn 10 disengages from the guide wheel 72, the yarn 10 has a greater margin of movement, and the swing frame 3 can more easily drive the yarn 10 to trigger the second infrared beam sensor 22.

[0086] When the yarn 10 is intact, the front and rear traction resistance of the yarn 10 is extremely large. Even if the swing frame 3 causes the yarn 10 to deflect, the yarn 10 will deflect by a small amount due to its own tension and resistance. Furthermore, the yarn 10 will find it difficult to overcome the magnetic attraction between the magnetic block 73 and the magnetic ring 74. In other words, the intact yarn 10 will not easily drive the guide wheel 72 to deflect, and the yarn 10 will not easily accidentally touch the second infrared beam sensor 22.

[0087] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A wire breakage detection device, characterized in that: The system includes a fixed base (1), a swing frame (3), a first infrared beam sensor (21), a second infrared beam sensor (22), a first controller, a pressure application component, and a second controller. The fixed base (1) is provided with a vertical plate (11). The first infrared beam sensor (21) and the second infrared beam sensor (22) are both located on the vertical plate (11), and the first infrared beam sensor (21) is higher than the second infrared beam sensor (22). The swing frame (3) includes a rotating shaft (35), a connecting rod (31), and a counterweight rod (32). The rotating shaft (35) is rotatably connected to the fixed base (1). The counterweight rod (32) is L-shaped. The lower ends of the counterweight rod (32) and the connecting rod (31) are both fixed to the rotating shaft (35). The connecting rod (31) is rotatably connected to the fixed base (1). The counterweight rod (32) is L-shaped. The lower ends of the counterweight rod (32) and the connecting rod (31) are both fixed to the rotating shaft (35). The upper end of the counterweight rod (31) is provided with a first guide roller (33) parallel to the rotating shaft (35), and 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). The first infrared beam sensor (21) is used to detect the position of the yarn (10) in a horizontal state, and the second infrared beam sensor (22) is used to detect the position of the yarn (10) in a tilted and slack state. The second infrared through-beam sensor (22) is electrically connected to the first controller; the second controller is electrically connected to the pressure application component and the first infrared through-beam sensor (21) respectively; when the yarn (10) is slack, after time t1 from when the first infrared through-beam sensor (21) can no longer detect the position of the yarn (10), the second controller starts the pressure application component, which forces the swing frame (3) to deflect along the downward direction of the second guide roller (34) to drive the yarn (10) toward the position of the second infrared through-beam sensor (22); when the yarn (10) is broken, the yarn (10) will deviate by a large distance, thereby triggering the sensing of the second infrared through-beam sensor (22) to complete the break detection, that is, starting from the pressure application component. When the second infrared beam sensor (22) detects the position of the yarn (10) within the time t2, the second controller stops the pressure application component; when the yarn (10) becomes loose due to reasons other than yarn breakage, after the time t2 from the start of the pressure application component, and when the second infrared beam sensor (22) does not detect the position of the yarn (10), the second controller stops the pressure application component; the pressure application component includes a servo motor and a rubber roller (5), a rubber sleeve (53) is fixedly fitted 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) includes a flat part (52) and an arc part (51), the arc part (51) is used to abut against the outer peripheral surface of the rubber sleeve (53), and the flat part (52) forms an active gap with the outer peripheral surface of the rubber roller (5);It also includes a wire assembly (7), which is located behind the fixing base (1). The wire assembly (7) includes a bracket (71), a guide wheel (72), a magnetic block (73), and a magnetic ring (74). The guide wheel (72) is horizontally arranged, and the middle part of the guide wheel (72) is connected to the end ball 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) where the yarn (10) passes. The magnetic ring (74) is provided on the guide wheel (72), and the magnetic block (73) and the magnetic ring (74) are magnetically connected.

2. The wire breakage detection device according to claim 1, characterized in that: It also includes a yarn speed detection component, which includes an air cylinder (6), an air inlet pipe (63), and a third infrared beam sensor (23). The air cylinder (6) has a first through hole (61) and a second through hole (62) through which the yarn (10) passes. 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 diameter of the second through hole (62) is smaller than that of the air outlet pipe (64). The air inlet pipe (63) and the third through hole (63) of the air cylinder (6) are connected. The side wall where the through hole (61) is located is connected. The cross-section of the air outlet pipe (64) is semi-circular. A semi-circular lightweight plate (65) with a shape adapted to the inner circumferential surface of the air outlet pipe (64) is provided inside the air outlet pipe (64). The upper side of the lightweight plate (65) is hinged to the inner circumferential surface of the air outlet pipe (64). The third infrared beam sensor (23) includes a transmitter (231) and a receiver (232). The transmitter (231) is located on the inner top surface of the air outlet pipe (64), and the receiver (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 lightweight plate (65) is blown by the airflow and deflected to the area between the emitting part (231) and the receiving part (232), the lightweight plate (65) blocks the infrared rays of the emitting part (231); the receiving part (232) is electrically connected to the second controller. When the receiving part (232) does not receive the infrared rays of the emitting part (231) for time t3, the second controller starts the pressure application component. The pressure application component forces the swing frame (3) to deflect along the downward direction of the second guide roller (34) to drive the yarn (10) toward the position of the second infrared beam sensor (22). When the pressure application component starts for time t2 and the second infrared beam sensor (22) does not detect the position of the yarn (10), the second controller stops the pressure application component. When the pressure application component starts for time t2 and the second infrared beam sensor (22) detects the position of the yarn (10), the second controller stops the pressure application component.

3. The wire breakage detection device according to claim 2, characterized in that: The air cylinder (6) is fixedly connected to the first guide roller (33).

4. The wire breakage detection device according to claim 1, characterized in that: It also includes a yarn speed detection component, which includes an air cylinder (6), an air inlet pipe (63), and a third infrared beam sensor (23). The air cylinder (6) is horizontally positioned and fixedly connected to the fixed base (1). The air cylinder (6) is located in front of the first guide roller (33). The air cylinder (6) has a first through hole (61) and a second through hole (62) through which the yarn (10) passes. 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 diameter of the second through hole (62) is smaller than that of the air outlet pipe (64). The air inlet pipe (63) is connected to the side wall where the first through hole (61) of the air cylinder (6) is located. The cross-section of the air outlet pipe (64) is semi-circular. A semi-circular lightweight plate (65) with a shape adapted to the inner circumference of the air outlet pipe (64) is provided inside the air outlet pipe (64). The upper side of the lightweight plate (65) is hinged to the inner circumference of the air outlet pipe (64). A reflective layer is provided on the surface of the lightweight plate (65) facing the outlet of the air outlet pipe (64). The third infrared beam sensor (23) The device includes a transmitter (231) and a receiver (232), both located inside the exhaust pipe (64). The receiver (232) is electrically connected to the second controller. The infrared rays emitted by the transmitter (231) strike the reflective layer. When the lightweight plate (65) is deflected by the airflow, the infrared rays from the reflective layer are reflected onto the receiver (232). After the receiver (232) receives the infrared rays from the transmitter (231) for a time t3, the second controller activates the pressure application component. The pressure application component forces the swing frame (3) to deflect in the downward direction of the second guide roller (34) to drive the yarn (10) toward the position of the second infrared beam sensor (22). When the pressure application component starts for time t2 and the second infrared beam sensor (22) does not detect the position of the yarn (10), the second controller stops the pressure application component. When the pressure application component starts for time t2 and the second infrared beam sensor (22) detects the position of the yarn (10), the second controller stops the pressure application component.

5. The wire breakage detection device according to claim 4, characterized in that: 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). The transmitting part (231) is disposed relative to the lightweight plate (65) near the outlet of the air outlet pipe (64), and the receiving part (232) is disposed relative to the transmitting part (231) near the outlet of the air outlet pipe (64).

6. The wire breakage detection device according to claim 4, characterized in that: The inner circumferential surface of the vent pipe (64) is covered with a black coating.

7. A textile processing equipment, characterized in that: It includes a wire feeding device, a wire breakage detection device as described in 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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