Contact type broken yarn sensor

Abstract

The invention relates to a contact type broken yarn sensor, and relates to the technical field of spinning. The device comprises a shell, a measuring frame, a balancing weight, a guide shaft, a linear guide sleeve, a wear-resistant guide sleeve and a sensor. During working, a yarn penetrates through the wear-resistant guide sleeve to restrain the guide shaft behind the measuring frame into the sensor to send a closing signal, and when the yarn is broken, the measuring frame slides forwards under the action of gravity, and the sensor sends a breaking signal. The invention provides a method for detecting the state of yarn, and aims to reduce the adverse effect of short fiber breakage on the quality of composite yarn in the composite spinning process and improve the automation level of rotor spinning.

Description

Technical Field

[0001] The invention relates to a contact type yarn break sensor and belongs to the technical field of spinning. Background Art

[0002] In the textile industry, spinning is a vital link. However, since the yarn moves in the high-speed rotating rotor during the spinning process, yarn breakage often occurs, causing great trouble to production. In order to ensure the smooth progress of the spinning process and improve production efficiency and product quality, it is crucial to use advanced detection technology to detect yarn breakage in real time during the spinning process.

[0003] Traditional solutions for detecting broken yarns are mostly based on photoelectric sensors, which have a light transmitter and a light receiver. The light transmitter is aimed at the moving yarn, and the yarn reflects the emitted light signal and is received by the light receiver; when the yarn breaks, no light reflection occurs. In this way, it is possible to detect in real time whether the yarn has broken. However, in actual use, this method is susceptible to the influence of environmental optics, resulting in false detection, and it will also affect the detection results when the yarn diameter is thin or the color is heavy. In response to the problem of false detection, a Chinese patent with publication number CN 108796711 A discloses a method for detecting broken yarns and a broken yarn sensor, which reduces the false detection rate to a certain extent by configuring at least two receivers with a transmitter, but this method is also costly and still cannot overcome the false detection problem caused by thin yarn diameter or heavy coloring.

[0004] The Chinese patent with publication number CN106205035A discloses a spandex core-spun yarn broken wire detection and alarm device, which uses a guide wheel arranged outside the box to connect a trigger device arranged inside the box through a movable lever arm to complete the detection and broken yarn. However, the structure of the device is non-open, which brings inconvenience to operators in practical application and subsequent maintenance.

[0005] Based on the above problems, the present invention designs a novel contact type yarn break sensor. Summary of the invention

[0006] In order to solve the problems existing in the above-mentioned prior art, the present application provides a contact type yarn break sensor, which converts whether the yarn is broken into a change in the position of the guide shaft by setting a guide shaft, and realizes whether the photoelectric signal is blocked according to the change in the position of the guide shaft, thereby timely and accurately detecting the yarn breakage and sending the yarn breakage signal.

[0007] The first object of the present invention is to provide a contact type yarn break sensor, which comprises a guide shaft housing 1, a measuring frame 2, a counterweight 3, a guide shaft 4, a linear guide sleeve 5, a wear-resistant guide sleeve 6, an optical sensor 7 and a base 8; the guide shaft housing 1 and the optical sensor 7 are arranged on the base 8; the optical sensor 7 comprises a light emitter and a light receiver, which are respectively arranged on two opposite support columns; the optical sensor 7 determines whether to issue a yarn break signal by detecting whether the light signal emitted by the light emitter is blocked by the guide shaft 4.

[0008] Optionally, the outer shell guide shaft 1 is a component provided with a through hole, in which a linear guide sleeve 5 is provided, and the guide shaft 4 can realize linear reciprocating motion in the linear guide sleeve 5, and the length of the guide shaft 4 is greater than the length of the through hole on the guide shaft outer shell 1, and one end of the guide shaft 4 is connected to the measuring frame 2, and the measuring frame 2 is provided with a counterweight block 3 and a wear-resistant guide sleeve 6.

[0009] Optionally, the contact type yarn break sensor is installed at a position where yarn breakage needs to be detected via a base 8. After installation, the guide shaft 4 has an inclined angle within a predetermined range with a horizontal plane.

[0010] Optionally, when the guide shaft 4 has an inclined angle within a predetermined range with the horizontal plane, the end connected to the measuring frame 2 is located at the bottom.

[0011] Optionally, the size of the inclined angle between the guide shaft 4 and the horizontal plane is set according to the weight of the counterweight 3 .

[0012] Optionally, the inclination angle between the guide shaft 4 and the horizontal plane ranges from 15° to 45°.

[0013] Optionally, when the yarn passes through the wear-resistant guide sleeve 6, the other end of the guide shaft 4 is located between the two support columns of the optical sensor 7 to achieve light signal blocking; when the yarn passing through the wear-resistant guide sleeve 6 is broken, the measuring frame 2 drives the guide shaft 4 to be pulled outward under the action of the gravity of the counterweight block 3, and then the other end located between the two support columns of the optical sensor 7 can no longer block the light signal, and the contact yarn break sensor sends a yarn break signal.

[0014] The second object of the present invention is to provide a yarn break detection device, which includes the above-mentioned contact yarn break sensor and a yarn guiding device, and the yarn guiding device includes one or more of a yarn guide hook, a yarn guide roller, a yarn guide roller, and a yarn guide rod yarn guide.

[0015] A third object of the present invention is to provide a spinning machine comprising the above-mentioned contact type yarn breakage sensor.

[0016] The beneficial effects of the present invention are:

[0017] The contact yarn break sensor provided by the present invention converts whether the yarn is broken into the change of the guide shaft position by setting a guide shaft, and realizes whether the photoelectric signal is blocked according to the change of the guide shaft position, thereby timely and accurately detecting the yarn break and sending the yarn break signal. After being interconnected with a yarn cutting device with a broken wire detection function, it can also be applied to the rotor composite spinning technology to detect whether the short fiber is broken in real time, cut the filament in time when the short fiber is broken, stop the filament feeding, reduce the adverse effect of the short fiber breakage on the composite yarn production during the composite spinning process, and improve the automation level of the rotor composite spinning. In addition, the device has low cost, small space occupation, high flexibility, convenient installation and maintenance, and is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 The present invention provides a schematic diagram of the overall structure of a contact-type yarn break sensor;

[0020] Figure 2 This is a schematic diagram of the working state of the contact type yarn break sensor proposed in the present invention.

[0021] Among them: 1. Guide shaft housing; 2. Measuring frame; 3. Counterweight; 4. Guide shaft; 5. Linear guide sleeve; 6. Wear-resistant guide sleeve; 7. Optical sensor; 8. Base. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0023] Embodiment 1:

[0024] This embodiment provides a contact type yarn break sensor, such as Figure 1 As shown, the contact type yarn break sensor includes a guide shaft housing 1, a measuring frame 2, a counterweight 3, a guide shaft 4, a linear guide sleeve 5, a wear-resistant guide sleeve 6, an optical sensor 7 and a base 8. The guide shaft housing 1 and the optical sensor 7 are arranged on the base 8, and the contact type yarn break sensor can be installed at the position where the yarn break needs to be detected through the base 8.

[0025] The optical sensor 7 includes a light transmitter and a light receiver, which are respectively arranged on two opposite support columns; the guide shaft housing 1 is a component provided with a through hole, in which a linear guide sleeve 5 is arranged, and the guide shaft 4 can realize linear reciprocating motion in the linear guide sleeve 5, and the length of the guide shaft 4 is slightly longer than the length of the through hole on the guide shaft housing 1; one end of the guide shaft 4 is connected to the measuring frame 2, and a counterweight block 3 and a wear-resistant guide sleeve 6 are arranged on the measuring frame 2. When the yarn passes through the wear-resistant guide sleeve 6, the other end of the guide shaft 4 can be located between the two support columns of the optical sensor 7 to achieve optical signal blocking; when the yarn in the wear-resistant guide sleeve 6 is broken, the measuring frame 2 drives the guide shaft 4 to be pulled outward under the action of the gravity of the counterweight block 3, and then the other end located between the two support columns of the optical sensor 7 can no longer block the optical signal, and the contact-type yarn break sensor sends a yarn break signal.

[0026] In actual usage scenarios, the contact yarn break sensor can be fixed at the position where the yarn break needs to be detected through the base 8. In order to facilitate the guide shaft 4 to be pulled out under the gravity of the counterweight 3, the base 8 can be fixed so that the guide shaft has a certain inclination angle with the horizontal plane. The angle range can be set according to the weight of the counterweight 3, for example, it can be set within the range of 15 to 45°.

[0027] like Figure 2 As shown, Figure 2 a in the figure is the position of the yarn and the status of the sensor during normal operation. Figure 2 In the middle, b is the state of the sensor when the yarn is broken; during normal operation, the yarn passes through the wear-resistant guide sleeve 6 to constrain the guide shaft 4 behind the measuring frame 2 to the optical sensor 7. At this time, the sensor detects the guide shaft 4 and sends a closing signal. When the yarn is broken, the measuring frame 2 slides forward under the gravity of the counterweight block 3, driving the guide shaft 4 to slide outward from the linear guide sleeve 5. The sensor detects that the guide shaft 4 slides out of the monitoring range of the sensor, and the optical sensor 7 sends a disconnection signal, thereby realizing real-time detection of the yarn state during the working process.

[0028] Some steps in the embodiments of the present invention may be implemented using software, and the corresponding software program may be stored in a readable storage medium, such as a CD or a hard disk.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A contact type yarn break sensor, characterized in that: The contact-type yarn break sensor comprises a guide shaft housing (1), a measuring frame (2), a counterweight (3), a guide shaft (4), a linear guide sleeve (5), a wear-resistant guide sleeve (6), an optical sensor (7) and a base (8); the guide shaft housing (1) and the optical sensor (7) are arranged on the base (8); the optical sensor (7) comprises a light emitter and a light receiver, which are respectively arranged on two opposite support columns; the optical sensor (7) determines whether a yarn break signal is issued by detecting whether a light signal emitted by the light emitter is blocked by the guide shaft (4).

2. The contact type yarn break sensor according to claim 1, characterized in that: The housing guide shaft (1) is a component provided with a through hole, a linear guide sleeve (5) is provided in the through hole, the guide shaft (4) can realize linear reciprocating motion in the linear guide sleeve (5), and the length of the guide shaft (4) is greater than the length of the through hole on the guide shaft housing (1), one end of the guide shaft (4) is connected to the measuring frame (2), and a counterweight block (3) and a wear-resistant guide sleeve (6) are provided on the measuring frame (2).

3. The contact type yarn break sensor according to claim 2, characterized in that: The contact-type yarn break sensor is installed at a position where yarn break detection is required via a base (8); after installation, the guide shaft (4) has an inclined angle within a predetermined range with the horizontal plane.

4. The contact type yarn break sensor according to claim 3, characterized in that: When the guide shaft (4) has an inclined angle within a predetermined range with the horizontal plane, the end connected to the measuring frame (2) is located at the bottom.

5. The contact type yarn break sensor according to claim 4, characterized in that: The size of the inclined angle between the guide shaft (4) and the horizontal plane is set according to the weight of the counterweight (3).

6. The contact type yarn break sensor according to claim 5, characterized in that: The inclination angle between the guide shaft (4) and the horizontal plane ranges from 15 to 45 degrees.

7. The contact type yarn break sensor according to claim 6, characterized in that: When the yarn passes through the wear-resistant guide sleeve (6), the other end of the guide shaft (4) is located between the two support columns of the optical sensor (7) to achieve light signal blocking; when the yarn passing through the wear-resistant guide sleeve (6) is broken, the measuring frame (2) drives the guide shaft (4) to be pulled outward under the action of the gravity of the counterweight block (3), and then the other end located between the two support columns of the optical sensor (7) can no longer block the light signal, and the contact-type yarn break sensor sends a yarn break signal.

8. A yarn break detection device, characterized in that: The yarn break detection device comprises the contact yarn break sensor and the yarn guiding device according to any one of claims 1 to 7, and the yarn guiding device comprises one or more of a yarn guide hook, a yarn guide roller, a yarn guide roller, and a yarn guide rod yarn guide.

9. A spinning machine, characterized in that: The spinning machine comprises the contact type yarn break sensor according to any one of claims 1 to 7.

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