Broken yarn detection device

Abstract

The utility model discloses a broken yarn detection device, which is applied to the technical field of textile equipment and comprises a shell, air cylinders are bolted to two sides of the top of the shell, push plates are bolted to the output ends of the two air cylinders, first thread wheels are rotatably connected to the bottoms of the two push plates, a sliding sleeve is slidably connected to the bottom of an inner cavity of the shell, and the sliding sleeve is connected to the bottom of the inner cavity of the shell. And a first spring is fixedly connected to the interior of the sliding sleeve, a second thread wheel is rotationally connected to the top of the sliding sleeve, and yarn penetrating openings are formed in the two sides of the shell in a penetrating mode. The second thread wheel is driven to overcome the elastic force of the first spring through the pressing force generated by pushing the yarn through the air cylinder, so that the sliding sleeve slides downwards. When the yarn is broken, resilience force of the first spring can drive the pressing plate to make contact with the button switch to open the button switch, and the alarm on the top gives an alarm. Therefore, whether the yarn is broken or not can be accurately judged, and the situation of false alarm easily caused by infrared induction is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of textile equipment, and particularly relates to a broken yarn detection device. Background Technique

[0002] During the weaving process of a warp knitting machine, if the yarn of the produced cloth has broken filaments, it will affect the quality of the cloth. In order to reduce the defect points on the cloth surface during the production process, it is necessary to detect the textile yarn.

[0003] At present, the Chinese utility model with the publication number of CN208167250U discloses a broken yarn detection device. It includes a broken yarn detection mechanism and a tensioning mechanism. The broken yarn detection mechanism combines with the tensioning mechanism to ensure that the yarn is kept tense during the conveying process, which is beneficial to improving the sensitivity of the broken yarn detection operation. The overall structure of the broken yarn detection mechanism is simple and the operation is convenient, effectively solving the problems of tediousness and fatigue in manually detecting broken yarns. The threading rod moves up and down in the rod tube, which can prevent the loss of the threading rod after the yarn breaks. When the threading rod drops, it triggers a microswitch, making the circuit where the microswitch is located form a closed loop, and turning on the buzzer for alarm.

[0004] In the prior art, for broken yarn detection, many use infrared induction, and judge whether the yarn is broken by using situations such as infrared occlusion. This kind of detection device is greatly affected by external factors. During long-term twisting, dust and fine hairs on the yarn will adsorb on the probe of the sensor, reducing the sensitivity of the sensor. When the infrared induction is not sensitive and the yarn fluctuates, false alarms are likely to occur, affecting the normal operation of the equipment. And because it uses the infrared induction method, its practicability is relatively low. Content of the Utility Model

[0005] The purpose of the utility model is to provide a broken yarn detection device, the advantage of which is that it uses a mechanical structure to accurately judge whether the yarn is broken, reduces the situation of false alarms, and can automatically protect the alarm when the machine stops, avoiding false alarms caused by accidental touch.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: A broken yarn detection device includes a housing. On both sides of the top of the housing, cylinders are bolted. The output ends of both cylinders are bolted with push plates. The bottoms of the two push plates are rotatably connected with a first wire wheel. The bottom of the inner cavity of the housing is slidably connected with a sliding sleeve. A first spring is fixedly connected inside the sliding sleeve. The top of the sliding sleeve is rotatably connected with a second wire wheel. Through holes for threading are respectively opened through both sides of the housing. Inside the through holes for threading, yarns that are respectively slidably connected with the first wire wheel and the second wire wheel are penetrated. A button switch is bolted to the top of the inner cavity of the housing. An alarm that is electrically connected to the button switch is bolted to the top of the housing. A pressing plate fixedly connected with the sliding sleeve is arranged at the top of the second wire wheel.

[0007] With the above technical solution, the pressing force generated by the cylinder pushing the yarn drives the second wire wheel to overcome the elastic force of the first spring, causing the sliding sleeve to slide downward. When the yarn breaks, the resilience of the first spring drives the pressing plate to contact the button switch and open it, causing the alarm at the top to give an alarm. Thus, it is possible to accurately determine whether the yarn breaks, reducing the situation of false alarms that are prone to occur in infrared sensing. When the cylinder drives the push plate to reset, the bottom of the button switch is closed by the elastic force of the second spring through the plug board, thus preventing the pressing plate from colliding with and opening the button switch. At the same time, during the normal opening and use of the device, the pressing plate can normally contact and open the button switch to give an alarm. Furthermore, the alarm can be automatically protected during shutdown to avoid false triggering of the alarm, improving the practicality.

[0008] The present utility model is further configured as: Plug boards slidably connected to the housing are provided on both sides of the bottom of the button switch. Pull ropes slidably penetrating through the housing are fixedly connected to the mutually remote sides of the two plug boards. One end of the pull rope remote from the plug board is fixedly connected to the push plate. Second springs fixedly connected to the plug board and the housing respectively are sleeved on the surface of the pull rope.

[0009] With the above technical solution, it is possible to prevent the pressing plate from colliding with and opening the button switch. At the same time, during the normal opening and use of the device, the pressing plate can normally contact and open the button switch to give an alarm.

[0010] The present utility model is further configured as: Support frames are bolted to both sides of the housing. A third wire wheel cooperating with the yarn is rotatably connected to the top of the support frame.

[0011] With the above technical solution, the yarn is supported, reducing the frictional force of the yarn sliding.

[0012] The present utility model is further configured as: Anti-slip sleeves are fixedly sleeved on the surfaces of the first wire wheel, the second wire wheel, and the third wire wheel.

[0013] With the above technical solution, the stability of the yarn sliding on the surfaces of the first wire wheel, the second wire wheel, and the third wire wheel is improved.

[0014] The present utility model is further configured as: A warning light electrically connected to the button switch is bolted to one side of the top of the alarm.

[0015] With the above technical solution, the light can keep flashing while giving an alarm, improving the alarm effect.

[0016] The present utility model is further configured as: An access door is bolted to one side of the outside of the housing.

[0017] With the above technical solution, it is convenient to open one side of the housing, so as to repair and replace the internal device parts.

[0018] The present utility model is further configured such that: rollers slidably connected to a same drawstring are rotatably connected to both sides inside the housing.

[0019] By adopting the above technical solution, the friction force of the drawstring sliding inside the housing is reduced, and the sliding stability is improved.

[0020] In summary, the present utility model has the following beneficial effects:

[0021] 1. The pressing force generated by the air cylinder pushing the yarn drives the second wire wheel to overcome the elastic force of the first spring, so that the sliding sleeve slides downward. When the yarn breaks, the resilience of the first spring will drive the pressing plate to contact the button switch and turn it on, causing the alarm at the top to give an alarm. Thus, it is possible to accurately judge whether the yarn breaks, reducing the situation of false alarms that are prone to occur in infrared induction;

[0022] 2. When the air cylinder drives the push plate to reset, the bottom of the button switch is closed by the elastic force of the second spring through the insertion plate, so that the pressing plate can be prevented from colliding with and turning on the button switch. At the same time, during the normal opening and use of the device, the pressing plate can normally contact and turn on the button switch for alarm. Furthermore, the alarm can be automatically protected during shutdown, avoiding false alarms caused by accidental touch and improving the practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the present utility model;

[0024] Figure 2 is a structural cross-sectional view of the present utility model;

[0025] Figure 3 is the present utility model Figure 2 enlarged view of point A in.

[0026] Reference numerals: 1. housing; 2. air cylinder; 3. yarn threading opening; 4. yarn; 5. push plate; 6. first wire wheel; 7. sliding sleeve; 8. first spring; 9. second wire wheel; 10. button switch; 11. pressing plate; 12. alarm; 13. insertion plate; 14. second spring; 15. support frame; 16. third wire wheel; 17. anti-slip sleeve; 18. warning light; 19. roller; 20. inspection door; 21. drawstring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0028] Embodiment 1:

[0029] Refer to Figure 1 、 Figure 2, A yarn breakage detection device, including a housing 1, both sides of the top of the housing 1 are bolted with cylinders 2, the output ends of the two cylinders 2 are bolted with push plates 5, the bottoms of the two push plates 5 are rotatably connected with a first wire wheel 6, the bottom of the inner cavity of the housing 1 is slidably connected with a sliding sleeve 7, a first spring 8 is fixedly connected inside the sliding sleeve 7, the top of the sliding sleeve 7 is rotatably connected with a second wire wheel 9, through holes 3 are respectively penetrated and opened on both sides of the housing 1, and yarns 4 respectively slidably connected with the first wire wheel 6 and the second wire wheel 9 are penetrated and arranged inside the through holes 3, a button switch 10 is bolted to the top of the inner cavity of the housing 1, an alarm 12 electrically connected to the button switch 10 is bolted to the top of the housing 1, and a pressing plate 11 fixedly connected with the sliding sleeve 7 is arranged on the top of the second wire wheel 9. The pressing force generated by the cylinder 2 pushing the yarn 4 drives the second wire wheel 9 to overcome the elastic force of the first spring 8, so that the sliding sleeve 7 slides downward. When the yarn 4 breaks, the elastic force of the first spring 8 will drive the pressing plate 11 to contact the button switch 10 and open it, so that the alarm 12 at the top generates an alarm. Thus, it can accurately judge whether the yarn breaks, reducing the situation of false alarms that are prone to occur in infrared induction.

[0030] Reference Figure 1 、 Figure 2 , Support frames 15 are bolted to both sides of the housing 1, and a third wire wheel 16 used in cooperation with the yarn 4 is rotatably connected to the top of the support frame 15. Support the yarn 4 to reduce the frictional force of the yarn 4 sliding.

[0031] Reference Figure 2 , Anti-slip sleeves 17 are fixedly sleeved on the surfaces of the first wire wheel 6, the second wire wheel 9, and the third wire wheel 16. Improve the sliding stability of the yarn 4 on the surfaces of the first wire wheel 6, the second wire wheel 9, and the third wire wheel 16.

[0032] Reference Figure 1 、 Figure 2 , A warning light 18 electrically connected to the button switch 10 is bolted to one side of the top of the alarm 12. The light can keep flashing while alarming, improving the alarm effect.

[0033] Brief description of the usage process: By passing the yarn 4 through the through hole 3 and tightening it, the yarn 4 slides at the bottom of the two first wire wheels 6 and the top of the second wire wheel 9. Then, by turning on the cylinder 2 to push the first wire wheel 6 downward, the pressing force generated by the first wire wheel 6 pushing the yarn 4 drives the second wire wheel 9 to overcome the elastic force of the first spring 8, so that the sliding sleeve 7 slides downward. When the yarn 4 breaks, the second wire wheel 9 lacks the pressing force of the yarn 4 and thus cannot overcome the elastic force of the first spring 8 anymore. Therefore, the first spring 8 will drive the sliding sleeve 7 to bounce up and down, and then drive the pressing plate 11 to contact and collide with the button switch 10, opening the button switch 10, so that the alarm 12 at the top generates an alarm.

[0034] Embodiment 2:

[0035] Reference Figure 1 、 Figure 2 、 Figure 3 A yarn breakage detection device. On both sides of the bottom of the push-button switch 10, there are inserted plates 13 slidably connected to the housing 1. On the side of each of the two inserted plates 13 away from each other, there is a pull rope 21 fixedly connected and slidably penetrating through the housing 1. One end of the pull rope 21 away from the inserted plate 13 is fixedly connected to the push plate 5. A second spring 14 fixedly connected to the inserted plate 13 and the housing 1 respectively is sleeved on the surface of the pull rope 21. When the inserted plate 13 uses the elastic force of the second spring 14 to close the bottom of the push-button switch 10 when the cylinder 2 drives the push plate 5 to reset, the collision of the pressing plate 11 to open the push-button switch 10 can be prevented. At the same time, during the normal opening and use of the device, the pressing plate 11 can normally contact and open the push-button switch 10 for alarm. Furthermore, the alarm can be automatically protected during shutdown to avoid false alarms caused by accidental touch, improving the practicability.

[0036] Reference Figure 1 On one side of the outside of the housing 1, there is a maintenance door 20 bolted. It is convenient to open one side of the housing 1, so as to repair and replace the internal equipment parts.

[0037] Reference Figure 3 On both sides inside the housing 1, there are rollers 19 rotatably connected and slidably connected to the pull rope 21. The friction of the pull rope 21 sliding inside the housing 1 is reduced, and the sliding stability is improved.

[0038] Brief description of the use process: When the cylinder 2 drives the push plate 5 to move downward, the pull rope 21 will be used to pull the inserted plate 13 to overcome the elastic force of the second spring 14, so that the inserted plate 13 slides from the bottom of the push-button switch 10 to both sides, opening the bottom of the push-button switch 10, so that when the yarn 4 breaks and the pressing plate 11 can collide with the push-button switch 10 to open it. At the same time, when the cylinder 2 drives the push plate 5 to reset, the inserted plate 13 can also be reset through the resilience of the second spring 14, so as to close the bottom of the push-button switch 10 to prevent the pressing plate 11 from colliding with the push-button switch 10 to open it. Since after the cylinder 2 pushes the push plate 5 to move downward, the inserted plate 13 will be opened, and at this time, even if the yarn 4 breaks, the push plate 5 will not be displaced. Therefore, during the opening and use of the cylinder 2, the pressing plate 11 can normally collide with the push-button switch 10. On the contrary, during the closing and resetting of the cylinder 2 when not in use, the pressing plate 11 cannot collide with the push-button switch 10.

[0039] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications without creative contributions to this embodiment according to needs after reading this specification, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A yarn break detection device, comprising a housing (1), characterized in that: Cylinders (2) are bolted to both sides of the top of the shell (1), push plates (5) are bolted to the output ends of the two cylinders (2), the bottoms of the two push plates (5) are rotatably connected to a first wire wheel (6), a sliding sleeve (7) is slidably connected to the bottom of the inner cavity of the shell (1), a first spring (8) is fixedly connected inside the sliding sleeve (7), and a second wire wheel (9) is rotatably connected to the top of the sliding sleeve (7), a yarn threading port (3) is penetrated through both sides of the shell (1), and a yarn (4) slidably connected to the first wire wheel (6) and the second wire wheel (9) is respectively arranged inside the yarn threading port (3), a button switch (10) is bolted to the top of the inner cavity of the shell (1), an alarm (12) electrically connected to the button switch (10) is bolted to the top of the shell (1), and a pressing plate (11) fixedly connected to the sliding sleeve (7) is arranged on the top of the second wire wheel (9).

2. A yarn break detection device according to claim 1, characterized in that: Both sides of the bottom of the push button switch (10) are provided with plug plates (13) slidably connected to the housing (1); the two plug plates (13) are fixedly connected to the sides away from each other with pull ropes (21) that penetrate and slide through the housing (1); one end of the pull rope (21) away from the plug plate (13) is fixedly connected to the push plate (5); and a second spring (14) is sleeved on the surface of the pull rope (21) and is respectively fixedly connected to the plug plate (13) and the housing (1).

3. A yarn breakage detection device according to claim 1, characterized in that: Support frames (15) are bolted to both sides of the housing (1), and the top of the support frame (15) is rotatably connected to a third wire wheel (16) used in conjunction with the yarn (4).

4. A yarn breakage detection device according to claim 3, characterized in that: The surfaces of the first wire wheel (6), the second wire wheel (9) and the third wire wheel (16) are all fixedly sleeved with anti-slip sleeves (17).

5. A yarn breakage detection device according to claim 1, characterized in that: A warning light (18) electrically connected to the push button switch (10) is bolted to one side of the top of the alarm (12).

6. A yarn breakage detection device according to claim 1, characterized in that: An inspection door (20) is bolted to one side of the exterior of the housing (1).

7. A yarn breakage detection device according to claim 2, characterized in that: Rollers (19) slidably connected to the pull rope (21) are rotatably connected to both sides of the interior of the housing (1).

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