Device for detecting size of yarn balloon

Abstract

The utility model provides a device for detecting the size of yarn ballooning, which comprises a photoelectric emission head and a photoelectric receiving head which are respectively arranged on two sides of a spindle tank, and a detection light beam is a light beam with a certain width or diameter, so that when the yarn ballooning is in contact with the detection light beam, the yarn ballooning influences the illumination intensity received by the photoelectric receiving head; and the width or the diameter of the cross section of the detection light beam is 0.5-10 mm. The maximum corner angle corresponding to the tangent intersection point of the detection light beam and the yarn ballooning is smaller than 90 degrees. According to the utility model, the light source is shaped, and the photoelectric emission head emits a shaped detection light beam, so that the detection light beam has enough width, the photoelectric receiving head can generate a signal according to the illumination intensity, and the diameter of the projection of the yarn balloon on the horizontal plane is calculated in real time according to the duration of the signal.

Description

Technical Field

[0001] The utility model relates to the field of twisting machine control, in particular to a device for detecting the size of a yarn balloon. Background Art

[0002] The yarn in a twisting machine is driven by the twisting assembly outside the spindle tank at 4,000 to 12,000 rpm to form a balloon. The size of the balloon has a significant impact on energy consumption and finished product quality. An excessively large balloon diameter can dramatically increase the twister's energy consumption by up to 30%. Furthermore, an overly large balloon may contact wallboard or yarn separators, causing increased yarn strength loss or even yarn breakage. An undersized balloon, on the other hand, can cause friction between the yarn and the spindle tank, resulting in fuzz and yarn breakage, affecting finished product quality and the machine's full spindle rate. Maintaining a stable balloon shape is essential for ensuring normal production of the twisting machine.

[0003] The balloon of the yarn refers to the virtual curved sphere that is externally connected to the outer yarn during its rotation. The tension controller is a mechanism that controls the yarn tension through a friction device using magnetic force or electricity. Overfeeding is a yarn feeding device used in production fields such as spinning and twisting. The yarn is wound on an overfeed roller with a specially treated surface. The overfeed roller is rotated by a transmission device to transport the yarn to the wire arrangement device, and then the wire arrangement device winds the yarn onto a yarn drum driven to rotate by the winding roller of the winding device. Chinese Patent 201910712746.8 records a device and method for detecting the distance from the balloon to the spindle tank. The distance from the yarn balloon to the spindle tank is detected by detecting the pulses generated by the yarn cutting light beam. The problem with this solution is that the adjustment of the yarn balloon is prone to repeated overshoot due to system delays, such as Figures 5-6 As shown in . Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a device for detecting the size of a yarn balloon, which can accurately detect the size of the balloon online and can smoothly control the size of the balloon.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a device for detecting the size of a yarn balloon, comprising a photoelectric transmitter and a photoelectric receiver respectively arranged on both sides of a spindle tank, a detection light beam between the photoelectric transmitter and the photoelectric receiver being arranged at a position where the circumscribed circle of the yarn balloon is tangent to the spindle tank when the distance therebetween is appropriate, and a detection light beam having a certain width or diameter, so that when the yarn balloon intersects the detection light beam, the yarn balloon affects the light intensity received by the photoelectric receiver;

[0006] The width or diameter of the cross section of the detection beam is 0.5 to 10 mm.

[0007] In a preferred solution, the maximum rotation angle corresponding to the intersection point between the detection light beam and the yarn balloon is less than 90°.

[0008] In a preferred solution, the detection light beam is a parallel light band composed of an array light source, and the cross section of the detection light beam is rectangular or circular.

[0009] In a preferred solution, an aperture is provided in the optical path of the photoelectric emission head, and the width or diameter of the detection light beam is adjusted by the aperture.

[0010] In a preferred embodiment, the detection light beam is tilted compared to the axis of the spindle pot so that the detection light beam is nearly perpendicular to the rotating outer yarn.

[0011] In the preferred solution, a main control device is further provided, which is electrically connected to the photoelectric transmitter and the photoelectric receiver, and supplies power to the photoelectric transmitter and the photoelectric receiver, and receives signals sent by the photoelectric receiver;

[0012] The main control device controls the tension controller, overfeed device, spindle motor and take-up device to adjust the tension of the yarn balloon individually or in combination.

[0013] The utility model provides a device for detecting the size of a yarn balloon, which has the following beneficial effects by adopting the above scheme:

[0014] 1. The utility model shapes the light source so that the photoelectric transmitter emits a shaped detection beam, so that the detection beam has a sufficient width, and the photoelectric receiver can generate a signal according to the light intensity, and calculate the diameter of the yarn balloon projected on the horizontal plane in real time according to the duration of the signal.

[0015] 2. This utility model can help reduce the energy consumption of equipment, improve enterprise production efficiency, reduce enterprise production costs, and improve product quality, which has a significant economic effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 It is a structural diagram of the present utility model.

[0018] Figure 2 It is a schematic structural diagram of the utility model when working.

[0019] Figure 3 This is a schematic diagram of the yarn balloon adjustment curve of the present utility model.

[0020] Figure 4 It is a structural schematic diagram of a yarn twisting machine of the present invention.

[0021] Figure 5 Schematic diagram of the detection method of the prior art.

[0022] Figure 6 Schematic diagram of yarn balloon adjustment curve in the prior art.

[0023] In the figure: spindle tank 1, yarn balloon 2, photoelectric transmitter 3, photoelectric receiver 4, main control device 5, detection beam 6, outer yarn 7, inner yarn 8, spindle motor 9, tension controller 10, twister 11, overfeed device 12, cable arranger 13, take-up device 14, distance L1 from spindle center to detection beam, detection beam width L2, balloon diameter R. DETAILED DESCRIPTION

[0024] Example 1:

[0025] like Figures 1-2 In the invention, a device for detecting the size of a yarn balloon comprises a photoelectric transmitter 3 and a photoelectric receiver 4 respectively arranged on both sides of a spindle tank 1, a detection light beam 6 between the photoelectric transmitter 3 and the photoelectric receiver 4 being arranged at a position where the circumscribed circle of the yarn balloon 2 is tangent to the spindle tank 1 when the distance L2 is appropriate, and the detection light beam 6 is a light beam with a certain width or diameter, so that when the yarn balloon 2 is in contact with the detection light beam 6, the yarn balloon 2 affects the light intensity received by the photoelectric receiver 4;

[0026] The yarn balloon 2 refers to a curved sphere circumscribed by the outer yarn 7 during rotation.

[0027] The width or diameter of the cross section of the detection beam 6 is 0.5 to 10 mm.

[0028] like Figure 2 As shown in , during the adjustment process, the diameter of the circumscribed circle of the yarn balloon is calculated using the following formula:

[0029]

[0030] cos(α+β)=L1 / R Formula 2;

[0031]

[0032] When the speed of the motor that drives the yarn is n, we have:

[0033] T / n=α / 2π Formula 4;

[0034] Right now:

[0035] α=2πT / n Formula 5;

[0036] Therefore:

[0037]

[0038] In the above formula, L1 is the distance from the edge of the detection beam to the center of the spindle tank, L2 is the detection beam width or diameter, R is the balloon diameter, T is the duration of the detection signal, α is the angle corresponding to when the yarn balloon blocks the detection beam, and β is 1 / 2 of the angle between the intersection of the yarn balloon and the detection beam when the detection beam is not blocked;

[0039] The size of the yarn balloon 2 is calculated using the above mathematical formula, and the photoelectric receiving head 4 determines whether the yarn balloon 2 is of appropriate size. Alternatively, the calculation of the present invention can also use a table lookup method. After calibrating the corresponding parameters, the corresponding parameters can be obtained by table lookup, thereby reducing the amount of calculation.

[0040] If the diameter of the circumscribed circle of the yarn balloon 2 on the horizontal projection plane is greater than the preset yarn balloon parameter, that is, the preset diameter parameter, the outer yarn tension begins to increase and the yarn balloon 2 shrinks. If the preset yarn balloon parameter of the yarn balloon 2 is greater than the preset yarn balloon parameter, the outer yarn tension begins to decrease and the yarn balloon 2 expands.

[0041] Figure 3 In the figure, it is the fluctuation curve of the diameter of the yarn balloon 2 after adjustment. Because in the control process, the diameter of the yarn balloon 2 always fluctuates around the preset value by adjusting the tension of the outer yarn 7. Compared with the prior art represented by patent 201910712746.8, the structure of the utility model can realize PID-based adjustment, making the fluctuation of the diameter of the yarn balloon 2 smoother and more stable.

[0042] like Figure 1 、 2 As shown, in a preferred embodiment, the maximum rotation angle corresponding to the tangent intersection point between the detection light beam 6 and the yarn balloon 2 is less than 90°.

[0043] In a preferred solution, the detection light beam 6 is a parallel light band composed of an array light source, and the cross section of the detection light beam 6 is rectangular or circular.

[0044] In a preferred solution, an aperture is set in the optical path of the photoelectric transmitter head 3, and the light source in the optical path of the photoelectric transmitter head 3 is adjusted to an expanded collimated beam through a lens group, and then an aperture is set at a position close to the output, and the width or diameter of the detection beam 6 is adjusted to a preset value through the aperture.

[0045] Example 2:

[0046] The preferred solution is Figure 4 In the example, detection beam 6 is tilted relative to the axis of spindle pot 1, so that it is nearly perpendicular to rotating outer yarn 7. This structure makes the detection signal generated by outer yarn 7 cutting detection beam 6 clearer. The calculation process uses the horizontal projection parameters of yarn balloon 2.

[0047] Example 3:

[0048] The preferred solution is Figure 4 In the apparatus, a main control device 5 is also provided, which is electrically connected to the photoelectric transmitter 3 and the photoelectric receiver 4 and supplies power to the photoelectric transmitter 3 and the photoelectric receiver 4. The main control device 5 receives the signal sent by the photoelectric receiver 4;

[0049] The main control device 5 adjusts the tension of the yarn balloon 2 in a timely manner by controlling the tension controller 10 .

[0050] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The embodiments and features therein may be arbitrarily combined unless they conflict. The scope of protection of the present invention shall be the technical solutions described in the claims, including equivalent alternatives to the technical features of the technical solutions described in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A device for detecting the size of a yarn balloon, comprising a photoelectric transmitter (3) and a photoelectric receiver (4) respectively arranged on both sides of a spindle tank (1), wherein a detection light beam (6) between the photoelectric transmitter (3) and the photoelectric receiver (4) is arranged at a position where the circumscribed circle of the yarn balloon (2) and the spindle tank (1) are tangent when the circumscribed circle is at an appropriate distance (L2), and wherein: The detection light beam (6) is a light beam with a certain width or diameter, so that when the yarn balloon (2) is aligned with the detection light beam (6), the yarn balloon (2) affects the light intensity received by the photoelectric receiving head (4); The width or diameter of the cross section of the detection beam (6) is 0.5 to 10 mm.

2. The device for detecting the size of a yarn balloon according to claim 1, wherein: The maximum rotation angle corresponding to the tangent intersection point between the detection light beam (6) and the yarn balloon (2) is less than 90°.

3. The device for detecting the size of a yarn balloon according to claim 1, wherein: The detection light beam (6) is a parallel light band composed of an array light source, and the cross section of the detection light beam (6) is rectangular or circular.

4. The device for detecting the size of a yarn balloon according to claim 1, wherein: An aperture is provided in the optical path of the photoelectric emission head (3), and the width or diameter of the detection light beam (6) is adjusted by the aperture.

5. The device for detecting the size of a yarn balloon according to any one of claims 1 to 4, characterized in that: The detection light beam (6) is arranged tilted compared to the axis of the spindle pot (1) so that the detection light beam (6) is nearly perpendicular to the rotating outer yarn (7).

6. The device for detecting the size of a yarn balloon according to any one of claims 1 to 4, characterized in that: A main control device (5) is also provided. The main control device (5) is electrically connected to the photoelectric transmitter (3) and the photoelectric receiver (4), and supplies power to the photoelectric transmitter (3) and the photoelectric receiver (4). The main control device (5) receives signals sent by the photoelectric receiver (4); The main control device (5) controls the tension controller (10), the overfeeding device (12), the spindle motor (9) and the winding device (14) to adjust the tension of the yarn balloon (2) individually or in combination.

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