阅读说明：本技术 一种浆染机纱线回潮率控制装置及其方法 (Yarn moisture regain control device and method of sizing and dyeing machine ) 是由 王宗文 梁汉锋 程锋 郑立辉 柯文博 于 2020-12-17 设计创作，主要内容包括：本发明提供了一种浆染机纱线回潮率控制装置及其方法,通过回潮率检测仪获取纱线的回潮率；计算所述回潮率与预设的目标回潮率之间的偏差值；判断所述偏差值是否在预设的允差范围内；若否,则保持浆染机的车速不变,并根据所述偏差值调节烘筒的温度以使所述偏差值落入所述预设的允差范围内；从而实现纱线回潮率的自动控制,使控制效果不再受限于技术人员的经验,有利于纱线回潮率的稳定。(The invention provides a device and a method for controlling the yarn moisture regain of a sizing and dyeing machine, wherein the moisture regain of the yarn is obtained through a moisture regain detector; calculating a deviation value between the moisture regain and a preset target moisture regain; judging whether the deviation value is within a preset tolerance range; if not, keeping the speed of the pulp dyeing machine unchanged, and adjusting the temperature of the drying cylinder according to the deviation value so that the deviation value falls into the preset tolerance range; therefore, the automatic control of the yarn moisture regain is realized, the control effect is not limited by the experience of technicians, and the stability of the yarn moisture regain is facilitated.)

1. A yarn moisture regain control method of a sizing and dyeing machine is applied to a controller of the sizing and dyeing machine and is characterized by comprising the following steps:

A1. acquiring the moisture regain of the yarn through a moisture regain detector;

A2. calculating a deviation value between the moisture regain and a preset target moisture regain;

A3. judging whether the deviation value is within a preset tolerance range;

A4. if not, keeping the speed of the pulp dyeing machine unchanged, and adjusting the temperature of the drying cylinder according to the deviation value so that the deviation value falls into the preset tolerance range.

2. The method for controlling the yarn moisture regain of the size dyeing machine according to claim 1, wherein the step a4 includes:

if the deviation value is larger than the upper limit value of the preset tolerance range, increasing the flow of the steam entering the drying cylinder;

and if the deviation value is smaller than the lower limit value of the preset tolerance range, reducing the steam flow entering the drying cylinder, and injecting condensed water into the drying cylinder.

3. The method for controlling the yarn moisture regain of the size dyeing machine according to claim 1, wherein the step a1 includes:

acquiring the resistance value of the yarn;

and acquiring the moisture regain of the yarn according to the resistance value.

4. The method for controlling the yarn moisture regain of the size dyeing machine according to claim 1, wherein the step a1 includes:

acquiring the moisture regain of the yarns at a plurality of different positions in the width direction;

and calculating the average value of the moisture regain of the yarns at the plurality of different positions as the effective moisture regain.

5. The yarn moisture regain control method of the size dyeing machine according to claim 4, wherein the step A2 is preceded by the steps of:

A5. calculating the difference between every two of the moisture regain rates of the yarns at the different positions;

A6. judging whether at least one of the difference values exceeds a preset deviation range;

A7. if yes, a first alarm signal is sent out.

6. A sizing and dyeing machine yarn moisture regain control device is characterized by comprising a moisture regain detector and a controller;

the moisture regain detector is used for detecting the moisture regain of the yarn;

the controller is used for executing the yarn moisture regain control method of the sizing and dyeing machine according to any one of claims 1 to 5.

7. The yarn moisture regain control device of the size dyeing machine according to claim 6, wherein the moisture regain detector comprises a resistance detection circuit module and a plurality of detection heads, each detection head comprises a conductive detection wheel pressed on a conductive size dyeing machine yarn roller, a yarn to be detected passes through between the conductive size dyeing machine yarn roller and the conductive detection wheel, and the conductive size dyeing machine yarn roller and the conductive detection wheel are respectively electrically connected with two detection electrodes of the resistance detection circuit module.

8. The yarn moisture regain control device of the size dyeing machine according to claim 7, wherein the detection head further comprises a first detection wheel box, a second detection wheel box and a detection wheel fixing frame, the conductive detection wheel is rotatably arranged in the detection wheel fixing frame, the detection wheel fixing frame is rotatably connected to one end of the second detection wheel box, and the other end of the second detection wheel box is rotatably connected to one end of the first detection wheel box;

the detection head further comprises a first adjusting mechanism for adjusting the rotation angle of the detection wheel fixing frame and a second adjusting mechanism for adjusting the rotation angle of the second detection wheel box.

9. The yarn moisture regain control device of the size dyeing machine according to claim 8, wherein the detection wheel holder and the conductive detection wheel are rotatable into the second detection wheel box; the second detection wheel box can rotate into the first detection wheel box.

10. The yarn moisture regain control device of the size dyeing machine according to claim 7, wherein the moisture regain detector further comprises a fixing rod parallel to the conductive size dyeing machine yarn roller; the detection head is arranged on the fixed rod, and the detection head can carry out position adjustment along the axial direction of the fixed rod.

Technical Field

The invention relates to the technical field of size dyeing, in particular to a device and a method for controlling the yarn moisture regain of a size dyeing machine.

Background

In the weaving process, a sizing process is a key process before weaving, and the weaving efficiency and quality are directly influenced by the sizing quality. The sizing quality is not good, can cause when weaving the broken ends many, and production efficiency is low, and output is little, can cause the piece cloth crosspiece that weaves to be many because of the yarn broken ends simultaneously, and the cloth cover style is poor to cause the quality of surface fabric poor, consequently every textile mill technical staff very much pay attention to the quality of sizing.

The main key indicators affecting the slashing quality are: sizing percentage, sizing elongation, sizing moisture regain and the like, and the sizing moisture regain control is one of the key points in sizing process parameter control. The moisture regain of the slashing has great influence on the elongation, the flexibility and the strength of the yarn, and meanwhile, the moisture regain of the slashing can cause other influences, such as low moisture regain of the slashing, easy breakage at a slashing dry split-twist part, stopping due to the breakage, and breakage of the slashing due to the breakage, so that the weaving is difficult, the quality and the production efficiency of the fabric are influenced, and a serious static phenomenon can be caused; when the moisture regain of the sizing is high, yarns in a sizing shaft are easy to stick together, particularly on edges, the sticking together of the yarns can cause elastic warps on the cloth surface and broken warps due to the sticking and tightness, and therefore the moisture regain of the yarns is very important in the sizing process.

At present, production technicians generally determine the yarn moisture regain by touching yarns with hand feeling and then control the yarn moisture regain by controlling the vehicle speed according to experience, the control effect is limited by the experience of the technicians, frequent vehicle speed adjustment is often carried out in a slasher, the vehicle speed is fast and slow for a moment, the stability of the yarn moisture regain is not facilitated, and meanwhile, the sizing rate between yarn sections is not uniform.

Thus, the prior art is in need of improvement and advancement.

Disclosure of Invention

In view of the defects of the prior art, the invention aims to provide a device and a method for controlling the yarn moisture regain of a sizing and dyeing machine, which can realize the automatic control of the yarn moisture regain, enable the control effect not to be limited by the experience of technicians and are beneficial to the stability of the yarn moisture regain.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method for controlling the yarn moisture regain of a sizing and dyeing machine is applied to a controller of the sizing and dyeing machine and comprises the following steps:

A1. acquiring the moisture regain of the yarn through a moisture regain detector;

A2. calculating a deviation value between the moisture regain and a preset target moisture regain;

A3. judging whether the deviation value is within a preset tolerance range;

A4. if not, keeping the speed of the pulp dyeing machine unchanged, and adjusting the temperature of the drying cylinder according to the deviation value so that the deviation value falls into the preset tolerance range.

In the method for controlling the yarn moisture regain of the sizing and dyeing machine, the step A4 comprises the following steps:

if the deviation value is larger than the upper limit value of the preset tolerance range, increasing the flow of the steam entering the drying cylinder;

and if the deviation value is smaller than the lower limit value of the preset tolerance range, reducing the steam flow entering the drying cylinder, and injecting condensed water into the drying cylinder.

In the method for controlling the yarn moisture regain of the sizing and dyeing machine, the step A1 comprises the following steps:

acquiring the resistance value of the yarn;

and acquiring the moisture regain of the yarn according to the resistance value.

In the method for controlling the yarn moisture regain of the sizing and dyeing machine, the step A1 comprises the following steps:

acquiring the moisture regain of the yarns at a plurality of different positions in the width direction;

and calculating the average value of the moisture regain of the yarns at the plurality of different positions as the effective moisture regain.

In the method for controlling the yarn moisture regain of the size dyeing machine, before the step A2, the method further comprises the following steps:

A5. calculating the difference between every two of the moisture regain rates of the yarns at the different positions;

A6. judging whether at least one of the difference values exceeds a preset deviation range;

A7. if yes, a first alarm signal is sent out.

A sizing and dyeing machine yarn moisture regain control device comprises a moisture regain detector and a controller;

the moisture regain detector is used for detecting the moisture regain of the yarn;

the controller is used for executing the yarn moisture regain control method of the size dyeing machine.

In the yarn moisture regain control device of the size dyeing machine, the moisture regain detector comprises a resistance detection circuit module and a plurality of detection heads, each detection head comprises a conductive detection wheel pressed on a conductive size dyeing machine yarn roller, yarns to be detected penetrate through the conductive size dyeing machine yarn roller and the conductive detection wheels, and the conductive size dyeing machine yarn roller and the conductive detection wheels are respectively electrically connected with two detection electrodes of the resistance detection circuit module.

In the yarn moisture regain control device of the size dyeing machine, the detection head further comprises a first detection wheel box, a second detection wheel box and a detection wheel fixing frame, the conductive detection wheel is rotatably arranged in the detection wheel fixing frame, the detection wheel fixing frame is rotatably connected to one end of the second detection wheel box, and the other end of the second detection wheel box is rotatably connected with one end of the first detection wheel box;

the detection head further comprises a first adjusting mechanism for adjusting the rotation angle of the detection wheel fixing frame and a second adjusting mechanism for adjusting the rotation angle of the second detection wheel box.

In the yarn moisture regain control device of the size dyeing machine, the detection wheel fixing frame and the conductive detection wheel can rotate into the second detection wheel box; the second detection wheel box can rotate into the first detection wheel box.

In the yarn moisture regain control device of the size dyeing machine, the moisture regain detector also comprises a fixed rod parallel to the yarn roller of the conductive size dyeing machine; the detection head is arranged on the fixed rod, and the detection head can carry out position adjustment along the axial direction of the fixed rod.

Has the advantages that:

the invention provides a device and a method for controlling the yarn moisture regain of a sizing and dyeing machine, wherein the moisture regain of the yarn is obtained through a moisture regain detector; calculating a deviation value between the moisture regain and a preset target moisture regain; judging whether the deviation value is within a preset tolerance range; if not, keeping the speed of the pulp dyeing machine unchanged, and adjusting the temperature of the drying cylinder according to the deviation value so that the deviation value falls into the preset tolerance range; therefore, the automatic control of the yarn moisture regain is realized, the control effect is not limited by the experience of technicians, and the stability of the yarn moisture regain is facilitated.

Drawings

FIG. 1 is a flow chart of a method for controlling the yarn moisture regain of a size dyeing machine provided by the invention.

Fig. 2 is a schematic structural diagram of a yarn moisture regain control device of a size dyeing machine provided by the invention.

Fig. 3 is a schematic structural diagram of a moisture regain detector in the yarn moisture regain control device of the size dyeing machine provided by the invention.

Fig. 4 is an enlarged view of a portion S in fig. 3.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The following disclosure provides embodiments or examples for implementing different configurations of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

Referring to fig. 1, the method for controlling the yarn moisture regain of the sizing and dyeing machine according to the present invention is applied to a controller of the sizing and dyeing machine, and includes:

A1. acquiring the moisture regain of the yarn through a moisture regain detector;

A2. calculating a deviation value between the moisture regain and a preset target moisture regain;

A3. judging whether the deviation value is within a preset tolerance range;

A4. if not, keeping the speed of the pulp dyeing machine unchanged, and adjusting the temperature of the drying cylinder according to the deviation value so that the deviation value falls within a preset tolerance range.

In the step A4, the speed of the size dyeing machine is kept unchanged, and the speed of the size dyeing machine is prevented from being fast and slow at any time, so that the problem of uneven sizing rate between yarn sections is avoided, and the yarn is ensured to be uniformly sized. There are many ways to adjust the temperature of the drying cylinder.

For example, in some embodiments, step a4 includes:

A401. if the deviation value is larger than the upper limit value of the preset tolerance range, the steam flow entering the drying cylinder is increased;

A402. if the deviation value is smaller than the lower limit value of the preset tolerance range, the steam flow entering the drying cylinder is reduced, and condensed water is injected into the drying cylinder.

Specifically, the steam flow is adjusted to the aperture of the electromagnetic flow control valve on the accessible control steam input pipe, and when steam flow increases, the temperature of drying cylinder can rise to reduce the moisture regain of yarn, when steam flow reduces, the temperature of drying cylinder can descend, thereby increases the moisture regain of yarn. In step a402, the cooling can be achieved more quickly by injecting condensed water into the drying cylinder, thereby increasing the adjustment speed.

The tolerance range can be set according to actual needs, and is [ -0.3, 0.3] (i.e., greater than or equal to-0.3 and less than or equal to 0.3).

In some preferred embodiments, a comparison table or a calculation formula may be preset according to the relationship between the deviation value and the steam flow rate and the amount (volume) of the injected condensed water, and the calculation formula is queried from the comparison table or input according to the specific value of the deviation value in step a4 to obtain the required steam flow rate and the amount of the condensed water, and the control is performed according to the query result or the calculation result. But is not limited thereto.

For example, the comparison table includes different deviation value ranges, and the steam flow and the amount of water into which the condensed water is injected, which correspond to the deviation value ranges (for the deviation value range in which the deviation value exceeds the upper limit value of the preset tolerance range, the amount of water into which the condensed water is injected is zero); when the query is performed in steps a401 and a402, it is first determined which deviation value range the deviation value belongs to, and then the steam flow rate and the amount of water of injected condensed water corresponding to the deviation value range are extracted as query results.

Preferably, step a4 may further include:

A403. if the deviation value is larger than the upper limit value of the preset tolerance range, a second alarm signal is sent;

A404. and if the deviation value is smaller than the lower limit value of the preset tolerance range, sending a third alarm signal.

The second and third alert signals may be acoustic and/or optical signals. For example, the second warning signal is that the warning lamp emits red light, and the third warning signal is that the warning lamp emits green light.

There are many ways to obtain the moisture regain of the yarn, for example, the moisture regain of the yarn can be measured by a resistance method, a capacitance method, an infrared absorption method, and a microwave method, but is not limited thereto.

In some embodiments, step a1 includes:

acquiring the resistance value of the yarn;

and acquiring the moisture regain of the yarn according to the resistance value.

For example, based on the moisture regain detector 100 shown in fig. 3, the moisture regain detector includes a resistance detection circuit module 1 and a plurality of detection heads 2, each detection head 2 includes a conductive detection wheel 3 pressed on a conductive size dyeing machine yarn roller 90, a yarn to be detected passes through between the conductive size dyeing machine yarn roller 90 and the conductive detection wheel 3, and the conductive size dyeing machine yarn roller 90 and the conductive detection wheel 3 are respectively electrically connected with two detection electrodes of the resistance detection circuit module 1. When wet yarns pass through the space between the yarn roller 90 of the conductive size dyeing machine and the conductive detection wheel 3, the resistance detection circuit is conducted to form a loop, so that the resistance value of the yarns between the yarn roller 90 of the conductive size dyeing machine and the conductive detection wheel 3 can be measured, a mapping table or a moisture regain calculation formula between different resistance values and yarn moisture regain can be obtained through tests in advance, and the corresponding moisture regain is obtained by inquiring in the mapping table according to the resistance value or by substituting the resistance value into the moisture regain calculation formula.

In some embodiments, only 1 detection head 2 is provided in the moisture regain detection apparatus 100, so that the moisture regain of the yarn at one position in the width direction (i.e., the direction along the axial direction of the conductive size dyeing machine yarn roll 90) is obtained in step a1. In the subsequent steps, the moisture regain is taken as the standard for control.

In other embodiments, a plurality of detection heads 2 are provided in the moisture regain detection apparatus 100, so that step a1 includes:

acquiring the moisture regain of the yarns at a plurality of different positions in the width direction;

and calculating the average value of the moisture regain of the yarns at a plurality of different positions as the effective moisture regain.

In the subsequent steps, the effective moisture regain is used as the standard for control. Compared with the method for acquiring the moisture regain of the yarns at one position, the method comprehensively considers the moisture regain conditions of the yarns at different positions, so that the accuracy is higher, and the control effect is better. Wherein, the number and the specific position distribution of the detection heads 2 can be set according to the actual requirement, for example, three positions are set and respectively aligned with the left, middle and right positions of the conductive size dyeing machine yarn roller 90, so that the steps are as follows:

acquiring the moisture regain of the yarns at the left position, the middle position and the right position;

the average of the moisture regain of the yarns at the three positions was calculated as the effective moisture regain.

Further, in some embodiments, step a2 is preceded by:

A5. calculating the difference between every two of the moisture regain rates of the yarns at the different positions;

A6. judging whether at least one of the difference values exceeds a preset deviation range;

A7. if yes, a first alarm signal is sent out.

When the difference between the moisture regain of the yarns at different positions exceeds a preset deviation range, the moisture regain of the yarns at each position in the width direction is not uniform, if no correction measure is taken, the quality of subsequent woven fabrics is affected, and here, a first alarm signal is sent out to inform technicians to correct the moisture regain. The first warning signal may be an acoustic signal and/or a light signal (e.g., a warning light flashing).

Sometimes, the moisture regain measured by the detection head 2 in the moisture regain detector 100 has a certain error, and if at least one of the differences is detected to be out of the preset deviation range, a first alarm signal is sent out, so that false alarm may be caused, and frequent alarm is easily caused; to this end, in other embodiments, step a2 is preceded by:

A8. calculating the difference between every two of the moisture regain rates of the yarns at the different positions;

A9. judging whether at least one of the difference values exceeds a preset deviation range or not, wherein the state duration time exceeding the preset deviation range reaches a preset first time threshold value;

A10. if yes, a first alarm signal is sent out.

The preset first time threshold may be set according to actual needs, for example, the preset first time threshold is 10s, but is not limited thereto.

Sometimes, the state duration time that the difference value between every two of the moisture regain rates of the yarns at different positions exceeds the preset deviation range may not reach the preset time threshold, but the state duration time may frequently exceed the preset deviation range, and when the state duration time is too frequent, an alarm should be given; for this reason, in some preferred embodiments, after step A8, the method further comprises:

A11. judging whether at least one of the difference values exceeds a preset deviation range for more than N times in a preset time period before the current moment; wherein N is a preset time threshold, and N is a positive integer;

A12. if yes, a first alarm signal is sent out.

The length of the preset time period and N may be set according to actual needs, for example, the preset time period is 2min, and N is 5, but not limited thereto.

The cause of the excessive variation in the moisture regain between the yarns in different positions may be generally non-uniform temperature of the cylinder, non-uniform yarn tension, etc.

Generally, the yarn has a high tension and a relatively low moisture regain, and therefore, in some embodiments, step a9 (and a 11) is followed by the steps of:

A13. and if so, acquiring tension data of each yarn, and adjusting the tension of each yarn according to the tension data.

For example, the tension data of each yarn can be obtained by a yarn tension detector, and the tension of each yarn can be adjusted by adjusting the damping of the unwinding mechanism of each yarn, but the invention is not limited thereto. During the adjustment, the tension of each yarn is first averaged and then adjusted to the average.

The general drying cylinder is only provided with one steam inlet and one steam outlet, steam can only flow from one end of the drying cylinder to the other end, and the temperature of the steam can be gradually reduced in the flowing process, so that the temperature of the drying cylinder is uneven, therefore, a plurality of steam input ports can be axially arranged in the drying cylinder, and each steam input port can be respectively subjected to flow regulation by different flow control valves; thus, in some embodiments, after step a9 (and a 11), the method further comprises the steps of:

A14. and if so, acquiring steam flow data of each steam input port of the drying cylinder, and adjusting the steam flow of each steam input port according to the steam flow data.

For example, steam flow data for each steam input port may be measured by a flow meter. During adjustment, the flow rate average value of each steam input port can be calculated, and then the steam flow rate of each steam input port is adjusted to the flow rate average value.

If the condition of uneven moisture regain cannot be improved after the adjustment of the steps A13 and A14, the machine is judged to have a fault, and the machine needs to be stopped for inspection, so that the problem of yarn quality is avoided, and the quality defect of the subsequently woven fabric is avoided. Therefore, after the steps a13 and a14, the method further comprises the steps of:

A15. if at least one of the differences between every two of the moisture regain rates of the yarns at the different positions exceeds the preset deviation range within the preset detection time, and the state duration time exceeding the preset deviation range reaches a preset second time threshold, stopping the machine.

It should be noted that the preset target moisture regain in step a2 is set according to parameters such as the actual composition, proportion, yarn count and twist of the yarn, a specific target moisture regain value can be set in advance according to the parameters of the yarn to be processed, and the target moisture regain is directly read in step a 2; a target moisture regain calculation formula for calculating a target moisture regain by yarn count and twist of yarns of different compositions and ratios may be preset, so that the step a2 includes:

acquiring data of components, proportion, yarn count and twist of the yarn;

selecting a corresponding target moisture regain calculation formula according to the components and the proportion data of the yarns;

substituting the yarn count and twist data into the target moisture regain calculation formula, and calculating to obtain the target moisture regain as a preset target moisture regain.

According to the method for controlling the yarn moisture regain of the sizing and dyeing machine, the moisture regain of the yarn is obtained through the moisture regain detector; calculating a deviation value between the moisture regain and a preset target moisture regain; judging whether the deviation value is within a preset tolerance range; if not, keeping the speed of the pulp dyeing machine unchanged, and adjusting the temperature of the drying cylinder according to the deviation value so that the deviation value falls into the preset tolerance range; therefore, the automatic control of the yarn moisture regain is realized, the control effect is not limited by the experience of technicians, and the stability of the yarn moisture regain is facilitated.

Referring to fig. 2 and 3, the present invention further provides a yarn moisture regain control device of a size dyeing machine, including a moisture regain detector 100 and a controller 200;

the moisture regain detector 100 is used for detecting the moisture regain of the yarn;

the controller 200 is used for executing the yarn moisture regain control method of the size dyeing machine.

In some embodiments, see fig. 2 and 3, the moisture regain detector 100 includes a resistance detection circuit module 1 and a plurality of detection heads 2, the detection heads 2 include conductive detection wheels 3 pressed on the conductive size dyeing machine yarn roller 90, the yarn to be detected passes through between the conductive size dyeing machine yarn roller 90 and the conductive detection wheels 3, and the conductive size dyeing machine yarn roller 90 and the conductive detection wheels 3 are electrically connected to two detection electrodes of the resistance detection circuit module 1, respectively. When the yarn moisture regain tester works, when a yarn passes through between the yarn roller 90 of the conductive size dyeing machine and the conductive detection wheel 3, the resistance detection circuit is conducted to form a loop, so that the resistance value of the yarn between the yarn roller 90 of the conductive size dyeing machine and the conductive detection wheel 3 can be measured, the resistance value can be sent to the controller 200, and the moisture regain is calculated by the controller 200 according to the resistance value (a mapping table or a moisture regain calculation formula between different resistance values and yarn moisture regain can be obtained through tests in advance and is stored in the controller 200, so that the controller 200 inquires the corresponding moisture regain in the mapping table according to the resistance value, or substitutes the resistance value into the moisture regain calculation formula to obtain the corresponding moisture regain; alternatively, a processing chip MCU may be disposed in the moisture regain detector 100, and the moisture regain may be calculated by the processing chip MCU according to the resistance value (the specific calculation method refers to a method of calculating the moisture regain by the controller 200).

Further, as shown in fig. 3 and 4, the detection head 2 further includes a first detection wheel box 4, a second detection wheel box 5 and a detection wheel fixing frame 6, the conductive detection wheel 3 is rotatably disposed in the detection wheel fixing frame 6, the detection wheel fixing frame 6 is rotatably connected to one end of the second detection wheel box 5, and the other end of the second detection wheel box 5 is rotatably connected to one end of the first detection wheel box 4;

the detection head 2 further comprises a first adjusting mechanism 7 for adjusting the rotation angle of the detection wheel fixing frame 6 and a second adjusting mechanism 8 for adjusting the rotation angle of the second detection wheel box 5. The position of the conductive detection wheel 3 can be adjusted by adjusting the angle of the detection wheel fixing frame 6 and the angle of the second detection wheel box 5, so that the conductive detection wheel 3 is reliably pressed on the conductive size dyeing machine yarn roller 90. In order to avoid the electric conduction detection wheel 3 from being communicated with the frame of the size dyeing machine and avoid the mutual influence between the detection heads 2, the first detection wheel box 4 and/or the second detection wheel box 5 are insulated.

In some preferred embodiments, the detection wheel holder 6 and the conductive detection wheel 3 are rotatable into the second detection wheel cartridge 5; the second detection wheel cartridge 5 is rotatable into the first detection wheel cartridge 4. In practical applications, there are impurities such as dust and cloth-covered hair in the air in a production workshop, and when the impurities adhere to the conductive detection wheel 3, the detection sensitivity is affected, so that the impurities need to be cleaned regularly. Here, when the moisture regain detector 100 is not in use, the conductive detection wheel 3 may be accommodated in the second detection wheel case 5, and the second detection wheel case 5 may be accommodated in the first detection wheel case 4, thereby reducing the adhesion of impurities such as dust and hairiness to the conductive detection wheel 3 and extending the cleaning cycle.

In this embodiment, as shown in fig. 3, the first detection wheel box 4 and the second detection wheel box 5 are both U-shaped grooves with downward notches, so that the detection wheel fixing frame 6 can rotate from below into the second detection wheel box 5, and the second detection wheel box 5 can rotate from below into the first detection wheel box 4.

In some embodiments, see fig. 4, the first adjusting mechanism 7 includes a first circular arc-shaped guiding hole 701 formed in a side wall of the second detection wheel box 5, a first stud 702 disposed on a side surface of the detection wheel fixing frame 6, and a first nut 703 fitted over the first stud 702; the first arc-shaped guide hole 701 is concentrically arranged with the rotating shaft of the detection wheel fixing frame 6, the first stud 702 penetrates through the first arc-shaped guide hole 701, and the first nut 703 is used for locking the first stud 702 in the first arc-shaped guide hole 701. When needing to adjust, unscrew first nut 703, can rotate and detect wheel mount 6 and adjust, screw up first nut 703 again after adjusting.

Similarly, the second adjusting mechanism 8 includes a second arc-shaped guide hole 801 formed in the side wall of the first detection wheel box 4, a second stud 802 disposed on the side surface of the second detection wheel box 5, and a second nut 803 fitted over the second stud 802; the second circular arc-shaped guide hole 801 and the rotating shaft of the second detection wheel box 5 are concentrically arranged, the second stud 802 penetrates through the second circular arc-shaped guide hole 801, and the second nut 803 is used for locking the second stud 802 in the second circular arc-shaped guide hole 801.

In some embodiments, see fig. 3, the moisture regain detector 100 further comprises a fixed bar 9 parallel to the conductive size dyeing machine yarn roller 90; the detection head 2 is arranged on the fixing rod 9, and the detection head 2 can be adjusted in position along the axial direction of the fixing rod 9. The position adjustment of the detection head 2 can be performed according to the position to be detected.

In this embodiment, a sleeve 401 is disposed at an end of the first testing wheel box 4 away from the second testing wheel box 5, and is sleeved on the fixing rod 9 through the sleeve 401 and locked by a locking screw 402. The fixing rod 9 may be provided in a prism shape, and the sleeve hole of the sleeve 401 may be provided in a corresponding prism shape, so that the detection head 2 may be prevented from transmitting rotation.

In some embodiments, referring to fig. 2, the yarn moisture regain control device of the size dyeing machine further comprises an alarm device 300, and the alarm device 300 is electrically connected with the controller 200. The alarm device 300 may include a buzzer and/or a warning light, wherein an acoustic alarm signal may be emitted through the buzzer and an optical alarm signal may be emitted through the warning light.

In some embodiments, referring to fig. 2, the yarn moisture regain control device of the size dyeing machine further includes a display device 400, and the display device 400 is electrically connected to the controller 200. The display device 400 is used for displaying the moisture regain detection results corresponding to the detection heads 2 in real time.

In some embodiments, referring to fig. 2, the yarn moisture regain control device of the size dyeing machine further includes a communication module 500, and the communication module 500 is electrically connected with the controller 200. The yarn moisture regain control device of the sizing and dyeing machine is in communication connection with the server through the communication module 500 so as to send the detection data to the server for storage and backup.

According to the sizing and dyeing machine yarn moisture regain control device, the moisture regain of the yarn is obtained through the moisture regain detector; calculating a deviation value between the moisture regain and a preset target moisture regain; judging whether the deviation value is within a preset tolerance range; if not, keeping the speed of the pulp dyeing machine unchanged, and adjusting the temperature of the drying cylinder according to the deviation value so that the deviation value falls into the preset tolerance range; therefore, the automatic control of the yarn moisture regain is realized, the control effect is not limited by the experience of technicians, and the stability of the yarn moisture regain is facilitated.

In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, which are substantially the same as the present invention.