Detection device for preparation and feeding of light, thin and soft multi-fiber-component composite fabric

Abstract

The invention discloses a light, thin and soft multi-fiber component composite fabric preparation feeding detection device, and relates to the technical field of yarn tension detection, the detection device comprises a guide wheel assembly capable of moving up and down, the bottom of the guide wheel assembly is connected with a pressure sensor through a spring, and the pressure sensor is used for monitoring yarn tension in real time; a sealing box is arranged outside the guide wheel assembly, a centrifugal fan is installed in the sealing box, an air inlet of the centrifugal fan right faces a friction area of the guide wheel assembly, an air outlet of the centrifugal fan faces a piezoelectric sensor, and the piezoelectric sensor calculates the concentration of the flying catkins by detecting the impact frequency of the flying catkins. The problems that in the prior art, when silk threads are fed, single contact type tension detection is prone to being affected by factors such as friction force, and the accuracy of tension detection is affected are solved. The yarn tension detection device has the advantages that double monitoring is carried out through contact type detection of the pressure sensor and non-contact type detection of the piezoelectric sensor, and the yarn tension detection stability and accuracy are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of yarn tension detection, and particularly to a detection device for feeding in the preparation of a light, thin, soft and multi-fiber component composite fabric. Background Art

[0002] In the preparation of composite fabrics, wire feeding is required. When feeding the wire, in order to ensure the feeding direction of the yarn, generally, guide wheels are used to guide the yarn, and at the same time, the tension of the yarn is adjusted through the guide wheels.

[0003] In the prior art, when feeding the yarn, when the tension increases abnormally, the yarn is prone to shrink and break at the knitting interface, resulting in production interruption and equipment damage; when the tension is too small, the knitted product becomes loose, affecting the overall quality. Therefore, it is necessary to monitor the tension of the yarn in real time. Then, when the tension shows an abnormal situation, the operator can respond in time. However, the existing detection structures generally monitor the tension through contact sensors. For example, for a yarn tension detection device with the application number 202421023495.5, when in use, the yarn bypasses three rollers in sequence. When the yarn presses the second roller downward, it will move downward, and when the second roller moves downward, it will squeeze the spring, causing the spring to deform. At this time, the force acting on the spring will be transmitted to the connecting plate and detected by the pressure sensor, thereby detecting the tension of the yarn. By using this method to monitor the tension, it is easily affected by other factors. For example, the frictional force of the downward movement of the second roller affects the pressure data of the pressure sensor.

[0004] Aiming at the above technical problems, the present invention discloses a detection device for feeding in the preparation of a light, thin, soft and multi-fiber component composite fabric. The present invention has the advantages of improving the stability and accuracy of yarn tension detection through dual monitoring by a pressure sensor and a piezoelectric sensor. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a detection device for feeding in the preparation of a light, thin, soft and multi-fiber component composite fabric, so as to solve the technical problems in the prior art that when feeding the wire, through single-contact tension detection, it is easily affected by factors such as friction and affects the accuracy of tension detection. The present invention has the advantages of improving the stability and accuracy of yarn tension detection through dual monitoring by contact detection of a pressure sensor and non-contact detection of a piezoelectric sensor.

[0006] The present invention is realized through the following technical solutions: The present invention discloses a detection device for feeding in the preparation of a light, thin, soft and multi-fiber component composite fabric, including a guide wheel assembly that can move up and down. The bottom of the guide wheel assembly is connected to a pressure sensor through a spring, which is used to monitor the yarn tension in real time; An external sealing box is provided for the guide wheel assembly. A centrifugal fan is installed inside the sealing box, and the air inlet of the centrifugal fan faces the friction area of the guide wheel assembly. The air outlet of the centrifugal fan faces the piezoelectric sensor. The piezoelectric sensor calculates the concentration of flying flocs by detecting the impact frequency of the flying flocs. An air vent is provided on the top wall of the sealing box.

[0007] Furthermore, the guide wheel assembly includes a mounting frame and a guide wheel. The mounting frame includes a bottom block and connecting blocks fixed on both sides above the bottom block. The guide wheel is arranged between the two connecting blocks, and movable blocks are longitudinally movably arranged on the connecting blocks. The wheel shaft of the guide wheel is rotatably connected to the movable blocks.

[0008] Furthermore, an activity groove for the up-and-down movement of the movable block is formed inside the connecting block. The pressure sensor is embedded and installed on the bottom wall of the activity groove. A spring is arranged below the movable block, and a pressure ring is arranged below the spring. The bottom surface of the pressure ring contacts the sensing surface of the pressure sensor.

[0009] Furthermore, the mounting frame is installed on the guide wheel frame, and an electric push rod is arranged below the mounting frame. The guide wheel is lifted and lowered by the electric push rod to adjust the wire tension.

[0010] Furthermore, a filter screen is installed at the air inlet of the centrifugal fan.

[0011] Furthermore, the air outlet of the centrifugal fan extends outside the sealing box. The piezoelectric sensor is installed outside the sealing box and is located downstream of the air outlet of the centrifugal fan.

[0012] Furthermore, a ceramic coating is sprayed on the surface of the blades of the centrifugal fan.

[0013] Furthermore, the guide wheel frame includes a base. A vertical plate is fixedly arranged above the base. One side of the vertical plate is longitudinally movably provided with a movable plate through a linear slide rail.

[0014] Furthermore, wire grooves are respectively formed on the outer walls at both ends of the sealing box.

[0015] The present invention has the following advantages: (1) By providing a pressure sensor and a piezoelectric sensor, the present invention detects the longitudinal displacement of the guide wheel through the pressure sensor. When guiding the wire through the guide wheel, when the tension of the wire changes, the change in the wire tension causes the guide wheel to have a longitudinal displacement, and the pressure sensor detects the longitudinal displacement amount thereof to judge the wire tension. In addition, the piezoelectric sensor detects the amount of flying flocs generated by the friction between the wire and the guide wheel. When the wire tension changes, the friction force between the wire and the guide wheel changes accordingly, and when the friction force changes, the amount of flying flocs generated by the friction between the wire and the guide wheel changes. Therefore, by detecting the concentration of flying flocs per unit time to judge the wire tension, the double detection of the wire tension is carried out through the contact detection of the pressure sensor and the non-contact detection of the piezoelectric sensor, improving the detection accuracy of the wire tension and reducing the error caused by the influence of other factors.

[0016] (2) By providing a sealed box and a centrifugal fan, the present invention can effectively isolate external vibrations and pollutants, ensuring that the piezoelectric sensor only responds to the flying floc impact signal from the exhaust port and improving the detection accuracy. Description of the Drawings

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the sealed box structure of the present invention; Figure 3 is a schematic diagram of the guide wheel structure of the present invention; Figure 4 is the present invention Figure 3 partial enlarged structure schematic diagram of part A.

[0018] In the figure: 1, guide wheel assembly; 2, electric push rod; 3, guide wheel frame; 4, slide rail; 5, slide seat; 6, activity groove; 7, activity block; 8, insertion shaft; 9, spring; 10, pressure ring; 11, pressure sensor; 12, piezoelectric sensor; 13, sealed box; 14, wire groove; 15, centrifugal fan; 16, filter screen; 17, air outlet; 101, mounting frame; 102, guide wheel; 301, base; 302, vertical plate; 303, activity plate; 111, bottom block; 112, connection block. Detailed Embodiment

[0019] The following is a detailed description of the embodiments of the present invention. These embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation manners and specific operation processes are given. However, the protection scope of the present invention is not limited to the following embodiments. In the description of the present invention, words indicating orientation or position relationships such as "front", "rear", "left", and "right" are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0020] The embodiment discloses a detection device for feeding in the preparation of a thin, light, soft and multi-fiber component composite fabric. As Figures 1 - 4 shown, it includes a guide wheel assembly 1 for guiding the silk thread. An electric push rod 2 is provided so that the guide wheel assembly 1 can be lifted and lowered by controlling the electric push rod 2. By lifting and lowering the guide wheel assembly 1, one section of the silk thread is raised or lowered, thereby controlling the tension of the silk thread during wire feeding.

[0021] Specifically, as Figure 1 and Figure 2 shown, the guide wheel assembly 1 is arranged on a guide wheel frame 3. The guide wheel frame 3 includes a base 301, a vertical plate 302 and a movable plate 303. Among them, a vertical plate 302 is fixedly arranged above the base 301, and a movable plate 303 is movably arranged on one side of the vertical plate 302. The movable plate 303 can move up and down along the height direction of the vertical plate 302; As Figure 1 shown, in order to improve the lifting stability of the movable plate 303, a slide rail 4 is fixedly arranged on one side of the vertical plate 302, and a slide seat 5 is fixedly arranged on one side of the movable plate 303 facing the vertical plate 302. The slide seat 5 is slidably matched with the slide rail 4, and the stability and accuracy of the lifting of the movable plate 303 are improved through the sliding match of the linear slide rail.

[0022] As Figure 1 and Figure 2 shown, the guide wheel assembly 1 is installed on the movable plate 303. In addition, an electric push rod 2 is arranged below the movable plate 303. The electric push rod 2 is fixedly installed on the base 301, and the telescopic shaft of the electric push rod 2 extends upward. The top end of the telescopic shaft of the electric push rod 2 is fixedly connected to the movable plate 303. Thus, the lifting of the guide wheel assembly 1 can be controlled by controlling the extension and contraction of the telescopic shaft of the electric push rod 2.

[0023] With the above settings, when feeding the yarn, the guide wheel assembly 1 is arranged between the starting end and the terminal end of the silk thread in the yarn feeding line. Thus, when feeding the yarn, the lifting of the guide wheel assembly 1 can be controlled by controlling the extension and contraction of the telescopic shaft of the electric push rod 2. The lifting of the guide wheel assembly 1 controls the rise and fall of a section of the yarn, thereby controlling the tension of the silk thread so that the tension can reach the required range.

[0024] During actual operation, in order to accurately understand the tension of the silk thread, as Figures 2 - 3 shown, the guide wheel assembly 1 is set to include a mounting bracket 101 and a guide wheel 102. Among them, the mounting bracket 101 is located on the movable plate 303, so that the mounting bracket 101 can be lifted and lowered with the movable plate 303. Specifically, the mounting bracket 101 includes a bottom block 111 and connecting blocks 112 fixedly arranged on both sides above the bottom block 111. There is a spacing between the two connecting blocks 112, and the guide wheel 102 is arranged between the two connecting blocks 112. The two side wheel shafts of the guide wheel 102 are respectively rotatably connected to the connecting blocks 112. In addition, the guide wheel 102 is longitudinally movably installed between the two connecting blocks 112; More specifically, as Figures 2 - 4 shown, movable grooves 6 are respectively formed inside the two connecting blocks 112, and movable blocks 7 are longitudinally movably inserted into the movable grooves 6. A plug shaft 8 is fixedly arranged at the bottom of the movable block 7, and a hole for plugging and matching with the plug shaft 8 is formed in the bottom wall of the movable groove 6. The longitudinal movement of the movable block 7 is limited by the plugging and matching of the plug shaft 8 and the hole, so that the movable block 7 can be lifted and lowered inside the movable groove 6. The wheel shaft of the guide wheel 102 is rotatably connected to the movable block 7 through a bearing. Thus, the guide wheel 102 can rotate and move up and down at the same time. In addition, a spring 9 is arranged below the movable block 7, and the spring 9 is sleeved outside the plug shaft 8. A pressure ring 10 is fixedly arranged at the bottom of the spring 9, and a pressure sensor 11 is arranged below the pressure ring 10. The pressure sensor 11 is embedded and installed in the bottom wall of the movable groove 6, and the sensing surface of the pressure sensor 11 is in contact with the bottom wall of the pressure ring 10. The pressure sensor 11 is used to monitor the contact pressure of the pressure ring 10.

[0025] With the above settings, the tension of the silk thread guided by the guide wheel 102 is monitored by the pressure sensor 11. When the silk thread is guided through the upper wheel wall of the guide wheel 102, the tension of the silk thread will be reflected on the guide wheel 102. When the tension of the silk thread is too large, the silk thread will press down the guide wheel 102, and the compression of the spring 9 will be caused by the downward pressure of the guide wheel 102. The pressure sensor 11 below the pressure ring 10 monitors its pressure, and then the tension of the silk thread is real-time fed back through the pressure data of the pressure sensor 11.

[0026] During actual operation, first, the silk thread passes through the outer wall of the top of the guide pulley 102, and then is guided by the guide pulley 102. After that, the electric push rod 2 is used to raise the guide wheel assembly 1, and then the guide pulley 102 will rise to adjust the tension of the silk thread. According to the pressure data feedback of the pressure sensor 11, the silk thread tension is adjusted to the normal range as the reference tension for wire feeding. When the tension becomes abnormal later, the guide pulley 102 will move longitudinally under the influence of the tension. The longitudinal movement of the guide pulley 102 will cause the spring 9 to compress or stretch. At the same time, as the spring 9 compresses and stretches, the downward pressure of the pressure ring 10 at the bottom of the spring 9 will change. The pressure sensor 11 below the pressure ring 10 real-time feeds back the pressure data. The staff can obtain the tension of the silk thread based on the pressure data. Taking the pressure data detected by the pressure sensor 11 when the silk thread tension is the reference tension as the benchmark, when the pressure data is greater than the reference pressure data, it means that the spring 9 is compressed, indicating that the silk thread tension is too large, and vice versa, the tension is too small.

[0027] Considering that during actual operation, the pressure data of the pressure sensor 11 will be affected by the force of the spring 9 and the friction force of the movable block 7, which will affect the staff's judgment of the silk thread tension. For example, when the spring 9 is fatigued after long-term use, or when the movement of the movable block 7 is affected by flying flocs and the friction increases, in this case, it will affect the downward pressure of the pressure ring 10, and then affect the pressure data monitored by the pressure sensor 11. Therefore, in this embodiment, in order to further improve the monitoring accuracy of the silk thread tension, as Figure 1 shown, a piezoelectric sensor 12 is set to perform non-contact monitoring on the tension of the silk thread.

[0028] Specifically, as Figure 1 and Figure 2 shown, a piezoelectric sensor 12 is installed at the guide pulley 102 assembly to monitor the flying flocs. During the wire feeding operation of the silk thread, the silk thread contacts the outer wall of the guide pulley 102, and the silk thread will be conveyed on the outer wall of the guide pulley 102. Therefore, the silk thread will inevitably rub against the guide pulley 102. When the friction increases, it will exacerbate the mechanical wear between the guide pulley 102 and the yarn, resulting in more flying flocs. When the tension increases, the normal pressure in the contact area between the yarn and the guide pulley 102 increases accordingly. According to the friction formula F = μN, when the friction coefficient μ remains unchanged, the friction force F will increase linearly. Therefore, it can be understood that when the tension is too large, the probability of flying flocs falling off will be significantly increased, that is, the greater the tension, the more flying flocs will be generated.

[0029] Therefore, in this embodiment, by setting the piezoelectric sensor 12 to monitor the flying floc concentration, when the flying floc concentration rises significantly within a unit time, it can be judged that the silk thread tension is too large. Then, dual tension monitoring is carried out through the non-contact monitoring of the piezoelectric sensor 12 and the contact monitoring of the pressure sensor 11 to improve the accuracy.

[0030] Specifically, Figure 1 and Figure 2 As shown, a sealed box 13 is arranged outside the guide wheel 102, the guide wheel assembly 1 is arranged inside the sealed box 13, and wire grooves 14 are respectively opened at both ends of the sealed box 13, and the wires can enter and extend from the wire grooves 14 at both ends of the sealed box 13, and an air outlet 17 is also arranged on the top of the sealed box 13, the sealed box 13 is fixedly arranged on the movable plate 303, the piezoelectric sensor 12 is installed outside the sealed box 13, and a centrifugal fan 15 is also installed inside the sealed box 13, the air inlet of the centrifugal fan 15 faces the friction area of ​​the guide wheel 102, and the air outlet of the centrifugal fan 15 extends to the outside of the sealed box 13 and faces the piezoelectric sensor 12; It should be noted that the blade surface of the centrifugal fan 15 is sprayed with a ceramic coating to prevent the accumulation of flying catkins, and the piezoelectric sensor 12 is installed 10CM downstream of the exhaust port of the sealed chamber.

[0031] A filter 16 is also provided at the air inlet of the centrifugal fan 15, and is set to be a 40-mesh metal filter to intercept large particles of flying catkins and protect the piezoelectric sensor 12 from physical damage. A filter is also installed at the air outlet 17 to block external flying catkins and prevent them from entering the sealed box 13.

[0032] By providing the sealing box 13, external vibrations and pollutants can be effectively isolated, ensuring that the piezoelectric sensor 12 only responds to the flying catkin impact signal from the exhaust port.

[0033] Through the above arrangement, when the wire is fed, the flying catkins generated by the friction between the wire and the guide wheel 102 are sucked into the centrifugal fan 15, discharged from the exhaust port, and directly hit the piezoelectric sensor 12 located downstream. The staff obtains the flying catkins concentration based on the flying catkins impact frequency of the piezoelectric sensor 12, and then judges the tension of the wire.

[0034] The principle of the present invention is as follows: The present invention is provided with a guide wheel assembly 1 and controls the lifting movement of the guide wheel assembly 1 through an electric push rod 2. Therefore, when the silk thread is fed, the silk thread passes through the outer wall of the top of the guide wheel 102, and then is guided by the guide wheel 102. After that, the guide wheel assembly 1 is lifted by the electric push rod 2, and then the guide wheel 102 will rise to adjust the tension of the silk thread. According to the pressure data feedback of the pressure sensor 11, the silk thread tension is adjusted to the normal range as the reference tension. After that, when the tension is abnormal, the guide wheel 102 will move longitudinally under the influence of the tension, and the longitudinal movement of the guide wheel 102 will cause the spring 9 to compress or stretch. At the same time, as the spring 9 compresses and stretches, the downward pressure of the pressure ring 10 at the bottom of the spring 9 will change, and the pressure sensor 11 below the pressure ring 10 will feedback the pressure data in real time. The staff can obtain the tension of the silk thread according to the pressure data. By setting the piezoelectric sensor 12 and the sealed box 13, when the yarn tension increases, the friction force between the guide wheel 102 and the yarn increases, resulting in an increase in the amount of flying flocs generated. After the centrifugal fan 15 accelerates and discharges the flying flocs, the impact frequency received by the piezoelectric sensor 12 will increase significantly. The staff judges the silk thread tension situation at this time, and conducts double tension detection through contact monitoring and non-contact monitoring, thereby improving the accuracy of the tension change of the silk thread during the wire feeding process.

[0035] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A detection device for preparing and feeding a thin, soft, multi-fiber composite fabric, comprising a guide wheel assembly (1) that can move up and down, characterized in that: The bottom of the guide wheel assembly (1) is connected to a pressure sensor (11) via a spring (9), which is used to monitor the yarn tension in real time; A sealing box (13) is provided outside the guide wheel assembly (1), a centrifugal fan (15) is installed inside the sealing box (13), and an air inlet of the centrifugal fan (15) faces the friction area of ​​the guide wheel assembly (1), and an exhaust port of the centrifugal fan (15) faces the piezoelectric sensor (12); The piezoelectric sensor (12) calculates the concentration of flying catkins by detecting the impact frequency of flying catkins, and the top wall of the sealed box (13) is provided with an air outlet (17).

2. A detection device for preparing and feeding a thin, soft, multi-fiber composite fabric as claimed in claim 1, characterized in that: The guide wheel assembly (1) comprises a mounting frame (101) and a guide wheel (102); the mounting frame (101) comprises a bottom block (111) and connecting blocks (112) fixed on both sides above the bottom block (111); the guide wheel (102) is arranged between the two connecting blocks (112); a movable block (7) is longitudinally movable on the connecting block (112); and the wheel axle of the guide wheel (102) is rotatably connected to the movable block (7).

3. A detection device for preparing and feeding a thin, soft, multi-fiber composite fabric as claimed in claim 2, characterized in that: The connection block (112) is provided with a movable groove (6) for the movable block (7) to move up and down. The pressure sensor (11) is embedded and installed in the bottom wall of the movable groove (6). The spring (9) is arranged below the movable block (7), and a pressure ring (10) is arranged below the spring (9). The bottom surface of the pressure ring (10) contacts the sensing surface of the pressure sensor (11).

4. A detection device for preparing and feeding a thin, soft, multi-fiber composite fabric as claimed in claim 2, characterized in that: The mounting frame (101) is mounted on the guide wheel frame (3), and an electric push rod (2) is arranged below the mounting frame (101). The guide wheel (102) is lifted and lowered by the electric push rod (2) to adjust the tension of the thread.

5. A detection device for preparing and feeding a thin, soft, multi-fiber composite fabric as claimed in claim 2, characterized in that: A filter screen (16) is installed at the air inlet of the centrifugal fan (15).

6. A detection device for preparing and feeding a thin, soft, multi-fiber composite fabric as claimed in claim 2, characterized in that: The exhaust port of the centrifugal fan (15) extends to the outside of the sealed box (13), and the piezoelectric sensor (12) is installed outside the sealed box (13) and is located downstream of the exhaust port of the centrifugal fan (15).

7. A detection device for preparing and feeding a thin, soft, multi-fiber composite fabric as claimed in claim 2, characterized in that: The blade surface of the centrifugal fan (15) is sprayed with a ceramic coating.

8. A detection device for preparing and feeding a thin, soft, multi-fiber composite fabric as claimed in claim 4, characterized in that: The guide wheel frame (3) comprises a base (301), a vertical plate (302) is fixedly arranged above the base (301), and a movable plate (303) is longitudinally movable on one side of the vertical plate (302) via a linear slide rail.

9. A detection device for preparing and feeding a thin, soft, multi-fiber composite fabric as claimed in claim 1, characterized in that: The outer walls at both ends of the sealing box (13) are respectively provided with wire grooves (14).

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